/usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86/X86InstrInfo.cpp

Bug Summary

File:	src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86/X86InstrInfo.cpp
Warning:	line 7776, column 18 Array access (from variable 'table') results in a null pointer dereference
Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name X86InstrInfo.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/clang/libLLVM/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/AMDGPU -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Analysis -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ASMParser -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/BinaryFormat -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Bitcode -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Bitcode -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Bitstream -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /include/llvm/CodeGen -I /include/llvm/CodeGen/PBQP -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/IR -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/IR -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Coroutines -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ProfileData/Coverage -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/CodeView -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/DWARF -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/MSF -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/PDB -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Demangle -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ExecutionEngine -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ExecutionEngine/JITLink -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ExecutionEngine/Orc -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend/OpenACC -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Frontend/OpenMP -I /include/llvm/CodeGen/GlobalISel -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/IRReader -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/InstCombine -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/Transforms/InstCombine -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/LTO -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Linker -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/MC -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/MC/MCParser -I /include/llvm/CodeGen/MIRParser -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Object -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Option -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Passes -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ProfileData -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Scalar -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/ADT -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Support -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/DebugInfo/Symbolize -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Target -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Utils -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/Vectorize -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include/llvm/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86 -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/Transforms/IPO -I /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/libLLVM/../include -I /usr/src/gnu/usr.bin/clang/libLLVM/obj -I /usr/src/gnu/usr.bin/clang/libLLVM/obj/../include -D NDEBUG -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D LLVM_PREFIX="/usr" -internal-isystem /usr/include/c++/v1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/usr/src/gnu/usr.bin/clang/libLLVM/obj -ferror-limit 19 -fvisibility-inlines-hidden -fwrapv -stack-protector 2 -fno-rtti -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c++ /usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/Target/X86/X86InstrInfo.cpp
1//===-- X86InstrInfo.cpp - X86 Instruction Information --------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file contains the X86 implementation of the TargetInstrInfo class.
10//
11//===----------------------------------------------------------------------===//

13#include "X86InstrInfo.h"
14#include "X86.h"
15#include "X86InstrBuilder.h"
16#include "X86InstrFoldTables.h"
17#include "X86MachineFunctionInfo.h"
18#include "X86Subtarget.h"
19#include "X86TargetMachine.h"
20#include "llvm/ADT/STLExtras.h"
21#include "llvm/ADT/Sequence.h"
22#include "llvm/CodeGen/LivePhysRegs.h"
23#include "llvm/CodeGen/LiveVariables.h"
24#include "llvm/CodeGen/MachineConstantPool.h"
25#include "llvm/CodeGen/MachineDominators.h"
26#include "llvm/CodeGen/MachineFrameInfo.h"
27#include "llvm/CodeGen/MachineInstrBuilder.h"
28#include "llvm/CodeGen/MachineModuleInfo.h"
29#include "llvm/CodeGen/MachineRegisterInfo.h"
30#include "llvm/CodeGen/StackMaps.h"
31#include "llvm/IR/DebugInfoMetadata.h"
32#include "llvm/IR/DerivedTypes.h"
33#include "llvm/IR/Function.h"
34#include "llvm/MC/MCAsmInfo.h"
35#include "llvm/MC/MCExpr.h"
36#include "llvm/MC/MCInst.h"
37#include "llvm/Support/CommandLine.h"
38#include "llvm/Support/Debug.h"
39#include "llvm/Support/ErrorHandling.h"
40#include "llvm/Support/raw_ostream.h"
41#include "llvm/Target/TargetOptions.h"

43using namespace llvm;

45#define DEBUG_TYPE"x86-instr-info" "x86-instr-info"

47#define GET_INSTRINFO_CTOR_DTOR
48#include "X86GenInstrInfo.inc"

50static cl::opt<bool>
  NoFusing("disable-spill-fusing",
           cl::desc("Disable fusing of spill code into instructions"),
           cl::Hidden);
54static cl::opt<bool>
55PrintFailedFusing("print-failed-fuse-candidates",
                cl::desc("Print instructions that the allocator wants to"
                         " fuse, but the X86 backend currently can't"),
                cl::Hidden);
59static cl::opt<bool>
60ReMatPICStubLoad("remat-pic-stub-load",
               cl::desc("Re-materialize load from stub in PIC mode"),
               cl::init(false), cl::Hidden);
63static cl::opt<unsigned>
64PartialRegUpdateClearance("partial-reg-update-clearance",
                        cl::desc("Clearance between two register writes "
                                 "for inserting XOR to avoid partial "
                                 "register update"),
                        cl::init(64), cl::Hidden);
69static cl::opt<unsigned>
70UndefRegClearance("undef-reg-clearance",
                cl::desc("How many idle instructions we would like before "
                         "certain undef register reads"),
                cl::init(128), cl::Hidden);


76// Pin the vtable to this file.
77void X86InstrInfo::anchor() {}

79X86InstrInfo::X86InstrInfo(X86Subtarget &STI)
  : X86GenInstrInfo((STI.isTarget64BitLP64() ? X86::ADJCALLSTACKDOWN64
                                             : X86::ADJCALLSTACKDOWN32),
                    (STI.isTarget64BitLP64() ? X86::ADJCALLSTACKUP64
                                             : X86::ADJCALLSTACKUP32),
                    X86::CATCHRET,
                    (STI.is64Bit() ? X86::RETQ : X86::RETL)),
    Subtarget(STI), RI(STI.getTargetTriple()) {
87}

89bool
90X86InstrInfo::isCoalescableExtInstr(const MachineInstr &MI,
                                  Register &SrcReg, Register &DstReg,
                                  unsigned &SubIdx) const {
switch (MI.getOpcode()) {
default: break;
case X86::MOVSX16rr8:
case X86::MOVZX16rr8:
case X86::MOVSX32rr8:
case X86::MOVZX32rr8:
case X86::MOVSX64rr8:
  if (!Subtarget.is64Bit())
    // It's not always legal to reference the low 8-bit of the larger
    // register in 32-bit mode.
    return false;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case X86::MOVSX32rr16:
case X86::MOVZX32rr16:
case X86::MOVSX64rr16:
case X86::MOVSX64rr32: {
  if (MI.getOperand(0).getSubReg() || MI.getOperand(1).getSubReg())
    // Be conservative.
    return false;
  SrcReg = MI.getOperand(1).getReg();
  DstReg = MI.getOperand(0).getReg();
  switch (MI.getOpcode()) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::MOVSX16rr8:
  case X86::MOVZX16rr8:
  case X86::MOVSX32rr8:
  case X86::MOVZX32rr8:
  case X86::MOVSX64rr8:
    SubIdx = X86::sub_8bit;
    break;
  case X86::MOVSX32rr16:
  case X86::MOVZX32rr16:
  case X86::MOVSX64rr16:
    SubIdx = X86::sub_16bit;
    break;
  case X86::MOVSX64rr32:
    SubIdx = X86::sub_32bit;
    break;
  }
  return true;
}
}
return false;
136}

138bool X86InstrInfo::isDataInvariant(MachineInstr &MI) {
switch (MI.getOpcode()) {
default:
  // By default, assume that the instruction is not data invariant.
  return false;

  // Some target-independent operations that trivially lower to data-invariant
  // instructions.
case TargetOpcode::COPY:
case TargetOpcode::INSERT_SUBREG:
case TargetOpcode::SUBREG_TO_REG:
  return true;

// On x86 it is believed that imul is constant time w.r.t. the loaded data.
// However, they set flags and are perhaps the most surprisingly constant
// time operations so we call them out here separately.
case X86::IMUL16rr:
case X86::IMUL16rri8:
case X86::IMUL16rri:
case X86::IMUL32rr:
case X86::IMUL32rri8:
case X86::IMUL32rri:
case X86::IMUL64rr:
case X86::IMUL64rri32:
case X86::IMUL64rri8:

// Bit scanning and counting instructions that are somewhat surprisingly
// constant time as they scan across bits and do other fairly complex
// operations like popcnt, but are believed to be constant time on x86.
// However, these set flags.
case X86::BSF16rr:
case X86::BSF32rr:
case X86::BSF64rr:
case X86::BSR16rr:
case X86::BSR32rr:
case X86::BSR64rr:
case X86::LZCNT16rr:
case X86::LZCNT32rr:
case X86::LZCNT64rr:
case X86::POPCNT16rr:
case X86::POPCNT32rr:
case X86::POPCNT64rr:
case X86::TZCNT16rr:
case X86::TZCNT32rr:
case X86::TZCNT64rr:

// Bit manipulation instructions are effectively combinations of basic
// arithmetic ops, and should still execute in constant time. These also
// set flags.
case X86::BLCFILL32rr:
case X86::BLCFILL64rr:
case X86::BLCI32rr:
case X86::BLCI64rr:
case X86::BLCIC32rr:
case X86::BLCIC64rr:
case X86::BLCMSK32rr:
case X86::BLCMSK64rr:
case X86::BLCS32rr:
case X86::BLCS64rr:
case X86::BLSFILL32rr:
case X86::BLSFILL64rr:
case X86::BLSI32rr:
case X86::BLSI64rr:
case X86::BLSIC32rr:
case X86::BLSIC64rr:
case X86::BLSMSK32rr:
case X86::BLSMSK64rr:
case X86::BLSR32rr:
case X86::BLSR64rr:
case X86::TZMSK32rr:
case X86::TZMSK64rr:

// Bit extracting and clearing instructions should execute in constant time,
// and set flags.
case X86::BEXTR32rr:
case X86::BEXTR64rr:
case X86::BEXTRI32ri:
case X86::BEXTRI64ri:
case X86::BZHI32rr:
case X86::BZHI64rr:

// Shift and rotate.
case X86::ROL8r1:
case X86::ROL16r1:
case X86::ROL32r1:
case X86::ROL64r1:
case X86::ROL8rCL:
case X86::ROL16rCL:
case X86::ROL32rCL:
case X86::ROL64rCL:
case X86::ROL8ri:
case X86::ROL16ri:
case X86::ROL32ri:
case X86::ROL64ri:
case X86::ROR8r1:
case X86::ROR16r1:
case X86::ROR32r1:
case X86::ROR64r1:
case X86::ROR8rCL:
case X86::ROR16rCL:
case X86::ROR32rCL:
case X86::ROR64rCL:
case X86::ROR8ri:
case X86::ROR16ri:
case X86::ROR32ri:
case X86::ROR64ri:
case X86::SAR8r1:
case X86::SAR16r1:
case X86::SAR32r1:
case X86::SAR64r1:
case X86::SAR8rCL:
case X86::SAR16rCL:
case X86::SAR32rCL:
case X86::SAR64rCL:
case X86::SAR8ri:
case X86::SAR16ri:
case X86::SAR32ri:
case X86::SAR64ri:
case X86::SHL8r1:
case X86::SHL16r1:
case X86::SHL32r1:
case X86::SHL64r1:
case X86::SHL8rCL:
case X86::SHL16rCL:
case X86::SHL32rCL:
case X86::SHL64rCL:
case X86::SHL8ri:
case X86::SHL16ri:
case X86::SHL32ri:
case X86::SHL64ri:
case X86::SHR8r1:
case X86::SHR16r1:
case X86::SHR32r1:
case X86::SHR64r1:
case X86::SHR8rCL:
case X86::SHR16rCL:
case X86::SHR32rCL:
case X86::SHR64rCL:
case X86::SHR8ri:
case X86::SHR16ri:
case X86::SHR32ri:
case X86::SHR64ri:
case X86::SHLD16rrCL:
case X86::SHLD32rrCL:
case X86::SHLD64rrCL:
case X86::SHLD16rri8:
case X86::SHLD32rri8:
case X86::SHLD64rri8:
case X86::SHRD16rrCL:
case X86::SHRD32rrCL:
case X86::SHRD64rrCL:
case X86::SHRD16rri8:
case X86::SHRD32rri8:
case X86::SHRD64rri8:

// Basic arithmetic is constant time on the input but does set flags.
case X86::ADC8rr:
case X86::ADC8ri:
case X86::ADC16rr:
case X86::ADC16ri:
case X86::ADC16ri8:
case X86::ADC32rr:
case X86::ADC32ri:
case X86::ADC32ri8:
case X86::ADC64rr:
case X86::ADC64ri8:
case X86::ADC64ri32:
case X86::ADD8rr:
case X86::ADD8ri:
case X86::ADD16rr:
case X86::ADD16ri:
case X86::ADD16ri8:
case X86::ADD32rr:
case X86::ADD32ri:
case X86::ADD32ri8:
case X86::ADD64rr:
case X86::ADD64ri8:
case X86::ADD64ri32:
case X86::AND8rr:
case X86::AND8ri:
case X86::AND16rr:
case X86::AND16ri:
case X86::AND16ri8:
case X86::AND32rr:
case X86::AND32ri:
case X86::AND32ri8:
case X86::AND64rr:
case X86::AND64ri8:
case X86::AND64ri32:
case X86::OR8rr:
case X86::OR8ri:
case X86::OR16rr:
case X86::OR16ri:
case X86::OR16ri8:
case X86::OR32rr:
case X86::OR32ri:
case X86::OR32ri8:
case X86::OR64rr:
case X86::OR64ri8:
case X86::OR64ri32:
case X86::SBB8rr:
case X86::SBB8ri:
case X86::SBB16rr:
case X86::SBB16ri:
case X86::SBB16ri8:
case X86::SBB32rr:
case X86::SBB32ri:
case X86::SBB32ri8:
case X86::SBB64rr:
case X86::SBB64ri8:
case X86::SBB64ri32:
case X86::SUB8rr:
case X86::SUB8ri:
case X86::SUB16rr:
case X86::SUB16ri:
case X86::SUB16ri8:
case X86::SUB32rr:
case X86::SUB32ri:
case X86::SUB32ri8:
case X86::SUB64rr:
case X86::SUB64ri8:
case X86::SUB64ri32:
case X86::XOR8rr:
case X86::XOR8ri:
case X86::XOR16rr:
case X86::XOR16ri:
case X86::XOR16ri8:
case X86::XOR32rr:
case X86::XOR32ri:
case X86::XOR32ri8:
case X86::XOR64rr:
case X86::XOR64ri8:
case X86::XOR64ri32:
// Arithmetic with just 32-bit and 64-bit variants and no immediates.
case X86::ADCX32rr:
case X86::ADCX64rr:
case X86::ADOX32rr:
case X86::ADOX64rr:
case X86::ANDN32rr:
case X86::ANDN64rr:
// Unary arithmetic operations.
case X86::DEC8r:
case X86::DEC16r:
case X86::DEC32r:
case X86::DEC64r:
case X86::INC8r:
case X86::INC16r:
case X86::INC32r:
case X86::INC64r:
case X86::NEG8r:
case X86::NEG16r:
case X86::NEG32r:
case X86::NEG64r:

// Unlike other arithmetic, NOT doesn't set EFLAGS.
case X86::NOT8r:
case X86::NOT16r:
case X86::NOT32r:
case X86::NOT64r:

// Various move instructions used to zero or sign extend things. Note that we
// intentionally don't support the _NOREX variants as we can't handle that
// register constraint anyways.
case X86::MOVSX16rr8:
case X86::MOVSX32rr8:
case X86::MOVSX32rr16:
case X86::MOVSX64rr8:
case X86::MOVSX64rr16:
case X86::MOVSX64rr32:
case X86::MOVZX16rr8:
case X86::MOVZX32rr8:
case X86::MOVZX32rr16:
case X86::MOVZX64rr8:
case X86::MOVZX64rr16:
case X86::MOV32rr:

// Arithmetic instructions that are both constant time and don't set flags.
case X86::RORX32ri:
case X86::RORX64ri:
case X86::SARX32rr:
case X86::SARX64rr:
case X86::SHLX32rr:
case X86::SHLX64rr:
case X86::SHRX32rr:
case X86::SHRX64rr:

// LEA doesn't actually access memory, and its arithmetic is constant time.
case X86::LEA16r:
case X86::LEA32r:
case X86::LEA64_32r:
case X86::LEA64r:
  return true;
}
431}

433bool X86InstrInfo::isDataInvariantLoad(MachineInstr &MI) {
switch (MI.getOpcode()) {
default:
  // By default, assume that the load will immediately leak.
  return false;

// On x86 it is believed that imul is constant time w.r.t. the loaded data.
// However, they set flags and are perhaps the most surprisingly constant
// time operations so we call them out here separately.
case X86::IMUL16rm:
case X86::IMUL16rmi8:
case X86::IMUL16rmi:
case X86::IMUL32rm:
case X86::IMUL32rmi8:
case X86::IMUL32rmi:
case X86::IMUL64rm:
case X86::IMUL64rmi32:
case X86::IMUL64rmi8:

// Bit scanning and counting instructions that are somewhat surprisingly
// constant time as they scan across bits and do other fairly complex
// operations like popcnt, but are believed to be constant time on x86.
// However, these set flags.
case X86::BSF16rm:
case X86::BSF32rm:
case X86::BSF64rm:
case X86::BSR16rm:
case X86::BSR32rm:
case X86::BSR64rm:
case X86::LZCNT16rm:
case X86::LZCNT32rm:
case X86::LZCNT64rm:
case X86::POPCNT16rm:
case X86::POPCNT32rm:
case X86::POPCNT64rm:
case X86::TZCNT16rm:
case X86::TZCNT32rm:
case X86::TZCNT64rm:

// Bit manipulation instructions are effectively combinations of basic
// arithmetic ops, and should still execute in constant time. These also
// set flags.
case X86::BLCFILL32rm:
case X86::BLCFILL64rm:
case X86::BLCI32rm:
case X86::BLCI64rm:
case X86::BLCIC32rm:
case X86::BLCIC64rm:
case X86::BLCMSK32rm:
case X86::BLCMSK64rm:
case X86::BLCS32rm:
case X86::BLCS64rm:
case X86::BLSFILL32rm:
case X86::BLSFILL64rm:
case X86::BLSI32rm:
case X86::BLSI64rm:
case X86::BLSIC32rm:
case X86::BLSIC64rm:
case X86::BLSMSK32rm:
case X86::BLSMSK64rm:
case X86::BLSR32rm:
case X86::BLSR64rm:
case X86::TZMSK32rm:
case X86::TZMSK64rm:

// Bit extracting and clearing instructions should execute in constant time,
// and set flags.
case X86::BEXTR32rm:
case X86::BEXTR64rm:
case X86::BEXTRI32mi:
case X86::BEXTRI64mi:
case X86::BZHI32rm:
case X86::BZHI64rm:

// Basic arithmetic is constant time on the input but does set flags.
case X86::ADC8rm:
case X86::ADC16rm:
case X86::ADC32rm:
case X86::ADC64rm:
case X86::ADCX32rm:
case X86::ADCX64rm:
case X86::ADD8rm:
case X86::ADD16rm:
case X86::ADD32rm:
case X86::ADD64rm:
case X86::ADOX32rm:
case X86::ADOX64rm:
case X86::AND8rm:
case X86::AND16rm:
case X86::AND32rm:
case X86::AND64rm:
case X86::ANDN32rm:
case X86::ANDN64rm:
case X86::OR8rm:
case X86::OR16rm:
case X86::OR32rm:
case X86::OR64rm:
case X86::SBB8rm:
case X86::SBB16rm:
case X86::SBB32rm:
case X86::SBB64rm:
case X86::SUB8rm:
case X86::SUB16rm:
case X86::SUB32rm:
case X86::SUB64rm:
case X86::XOR8rm:
case X86::XOR16rm:
case X86::XOR32rm:
case X86::XOR64rm:

// Integer multiply w/o affecting flags is still believed to be constant
// time on x86. Called out separately as this is among the most surprising
// instructions to exhibit that behavior.
case X86::MULX32rm:
case X86::MULX64rm:

// Arithmetic instructions that are both constant time and don't set flags.
case X86::RORX32mi:
case X86::RORX64mi:
case X86::SARX32rm:
case X86::SARX64rm:
case X86::SHLX32rm:
case X86::SHLX64rm:
case X86::SHRX32rm:
case X86::SHRX64rm:

// Conversions are believed to be constant time and don't set flags.
case X86::CVTTSD2SI64rm:
case X86::VCVTTSD2SI64rm:
case X86::VCVTTSD2SI64Zrm:
case X86::CVTTSD2SIrm:
case X86::VCVTTSD2SIrm:
case X86::VCVTTSD2SIZrm:
case X86::CVTTSS2SI64rm:
case X86::VCVTTSS2SI64rm:
case X86::VCVTTSS2SI64Zrm:
case X86::CVTTSS2SIrm:
case X86::VCVTTSS2SIrm:
case X86::VCVTTSS2SIZrm:
case X86::CVTSI2SDrm:
case X86::VCVTSI2SDrm:
case X86::VCVTSI2SDZrm:
case X86::CVTSI2SSrm:
case X86::VCVTSI2SSrm:
case X86::VCVTSI2SSZrm:
case X86::CVTSI642SDrm:
case X86::VCVTSI642SDrm:
case X86::VCVTSI642SDZrm:
case X86::CVTSI642SSrm:
case X86::VCVTSI642SSrm:
case X86::VCVTSI642SSZrm:
case X86::CVTSS2SDrm:
case X86::VCVTSS2SDrm:
case X86::VCVTSS2SDZrm:
case X86::CVTSD2SSrm:
case X86::VCVTSD2SSrm:
case X86::VCVTSD2SSZrm:
// AVX512 added unsigned integer conversions.
case X86::VCVTTSD2USI64Zrm:
case X86::VCVTTSD2USIZrm:
case X86::VCVTTSS2USI64Zrm:
case X86::VCVTTSS2USIZrm:
case X86::VCVTUSI2SDZrm:
case X86::VCVTUSI642SDZrm:
case X86::VCVTUSI2SSZrm:
case X86::VCVTUSI642SSZrm:

// Loads to register don't set flags.
case X86::MOV8rm:
case X86::MOV8rm_NOREX:
case X86::MOV16rm:
case X86::MOV32rm:
case X86::MOV64rm:
case X86::MOVSX16rm8:
case X86::MOVSX32rm16:
case X86::MOVSX32rm8:
case X86::MOVSX32rm8_NOREX:
case X86::MOVSX64rm16:
case X86::MOVSX64rm32:
case X86::MOVSX64rm8:
case X86::MOVZX16rm8:
case X86::MOVZX32rm16:
case X86::MOVZX32rm8:
case X86::MOVZX32rm8_NOREX:
case X86::MOVZX64rm16:
case X86::MOVZX64rm8:
  return true;
}
621}

623int X86InstrInfo::getSPAdjust(const MachineInstr &MI) const {
const MachineFunction *MF = MI.getParent()->getParent();
const TargetFrameLowering *TFI = MF->getSubtarget().getFrameLowering();

if (isFrameInstr(MI)) {
  int SPAdj = alignTo(getFrameSize(MI), TFI->getStackAlign());
  SPAdj -= getFrameAdjustment(MI);
  if (!isFrameSetup(MI))
    SPAdj = -SPAdj;
  return SPAdj;
}

// To know whether a call adjusts the stack, we need information
// that is bound to the following ADJCALLSTACKUP pseudo.
// Look for the next ADJCALLSTACKUP that follows the call.
if (MI.isCall()) {
  const MachineBasicBlock *MBB = MI.getParent();
  auto I = ++MachineBasicBlock::const_iterator(MI);
  for (auto E = MBB->end(); I != E; ++I) {
    if (I->getOpcode() == getCallFrameDestroyOpcode() ||
        I->isCall())
      break;
  }

  // If we could not find a frame destroy opcode, then it has already
  // been simplified, so we don't care.
  if (I->getOpcode() != getCallFrameDestroyOpcode())
    return 0;

  return -(I->getOperand(1).getImm());
}

// Currently handle only PUSHes we can reasonably expect to see
// in call sequences
switch (MI.getOpcode()) {
default:
  return 0;
case X86::PUSH32i8:
case X86::PUSH32r:
case X86::PUSH32rmm:
case X86::PUSH32rmr:
case X86::PUSHi32:
  return 4;
case X86::PUSH64i8:
case X86::PUSH64r:
case X86::PUSH64rmm:
case X86::PUSH64rmr:
case X86::PUSH64i32:
  return 8;
}
673}

675/// Return true and the FrameIndex if the specified
676/// operand and follow operands form a reference to the stack frame.
677bool X86InstrInfo::isFrameOperand(const MachineInstr &MI, unsigned int Op,
                                int &FrameIndex) const {
if (MI.getOperand(Op + X86::AddrBaseReg).isFI() &&
    MI.getOperand(Op + X86::AddrScaleAmt).isImm() &&
    MI.getOperand(Op + X86::AddrIndexReg).isReg() &&
    MI.getOperand(Op + X86::AddrDisp).isImm() &&
    MI.getOperand(Op + X86::AddrScaleAmt).getImm() == 1 &&
    MI.getOperand(Op + X86::AddrIndexReg).getReg() == 0 &&
    MI.getOperand(Op + X86::AddrDisp).getImm() == 0) {
  FrameIndex = MI.getOperand(Op + X86::AddrBaseReg).getIndex();
  return true;
}
return false;
690}

692static bool isFrameLoadOpcode(int Opcode, unsigned &MemBytes) {
switch (Opcode) {
default:
  return false;
case X86::MOV8rm:
case X86::KMOVBkm:
  MemBytes = 1;
  return true;
case X86::MOV16rm:
case X86::KMOVWkm:
  MemBytes = 2;
  return true;
case X86::MOV32rm:
case X86::MOVSSrm:
case X86::MOVSSrm_alt:
case X86::VMOVSSrm:
case X86::VMOVSSrm_alt:
case X86::VMOVSSZrm:
case X86::VMOVSSZrm_alt:
case X86::KMOVDkm:
  MemBytes = 4;
  return true;
case X86::MOV64rm:
case X86::LD_Fp64m:
case X86::MOVSDrm:
case X86::MOVSDrm_alt:
case X86::VMOVSDrm:
case X86::VMOVSDrm_alt:
case X86::VMOVSDZrm:
case X86::VMOVSDZrm_alt:
case X86::MMX_MOVD64rm:
case X86::MMX_MOVQ64rm:
case X86::KMOVQkm:
  MemBytes = 8;
  return true;
case X86::MOVAPSrm:
case X86::MOVUPSrm:
case X86::MOVAPDrm:
case X86::MOVUPDrm:
case X86::MOVDQArm:
case X86::MOVDQUrm:
case X86::VMOVAPSrm:
case X86::VMOVUPSrm:
case X86::VMOVAPDrm:
case X86::VMOVUPDrm:
case X86::VMOVDQArm:
case X86::VMOVDQUrm:
case X86::VMOVAPSZ128rm:
case X86::VMOVUPSZ128rm:
case X86::VMOVAPSZ128rm_NOVLX:
case X86::VMOVUPSZ128rm_NOVLX:
case X86::VMOVAPDZ128rm:
case X86::VMOVUPDZ128rm:
case X86::VMOVDQU8Z128rm:
case X86::VMOVDQU16Z128rm:
case X86::VMOVDQA32Z128rm:
case X86::VMOVDQU32Z128rm:
case X86::VMOVDQA64Z128rm:
case X86::VMOVDQU64Z128rm:
  MemBytes = 16;
  return true;
case X86::VMOVAPSYrm:
case X86::VMOVUPSYrm:
case X86::VMOVAPDYrm:
case X86::VMOVUPDYrm:
case X86::VMOVDQAYrm:
case X86::VMOVDQUYrm:
case X86::VMOVAPSZ256rm:
case X86::VMOVUPSZ256rm:
case X86::VMOVAPSZ256rm_NOVLX:
case X86::VMOVUPSZ256rm_NOVLX:
case X86::VMOVAPDZ256rm:
case X86::VMOVUPDZ256rm:
case X86::VMOVDQU8Z256rm:
case X86::VMOVDQU16Z256rm:
case X86::VMOVDQA32Z256rm:
case X86::VMOVDQU32Z256rm:
case X86::VMOVDQA64Z256rm:
case X86::VMOVDQU64Z256rm:
  MemBytes = 32;
  return true;
case X86::VMOVAPSZrm:
case X86::VMOVUPSZrm:
case X86::VMOVAPDZrm:
case X86::VMOVUPDZrm:
case X86::VMOVDQU8Zrm:
case X86::VMOVDQU16Zrm:
case X86::VMOVDQA32Zrm:
case X86::VMOVDQU32Zrm:
case X86::VMOVDQA64Zrm:
case X86::VMOVDQU64Zrm:
  MemBytes = 64;
  return true;
}
786}

788static bool isFrameStoreOpcode(int Opcode, unsigned &MemBytes) {
switch (Opcode) {
default:
  return false;
case X86::MOV8mr:
case X86::KMOVBmk:
  MemBytes = 1;
  return true;
case X86::MOV16mr:
case X86::KMOVWmk:
  MemBytes = 2;
  return true;
case X86::MOV32mr:
case X86::MOVSSmr:
case X86::VMOVSSmr:
case X86::VMOVSSZmr:
case X86::KMOVDmk:
  MemBytes = 4;
  return true;
case X86::MOV64mr:
case X86::ST_FpP64m:
case X86::MOVSDmr:
case X86::VMOVSDmr:
case X86::VMOVSDZmr:
case X86::MMX_MOVD64mr:
case X86::MMX_MOVQ64mr:
case X86::MMX_MOVNTQmr:
case X86::KMOVQmk:
  MemBytes = 8;
  return true;
case X86::MOVAPSmr:
case X86::MOVUPSmr:
case X86::MOVAPDmr:
case X86::MOVUPDmr:
case X86::MOVDQAmr:
case X86::MOVDQUmr:
case X86::VMOVAPSmr:
case X86::VMOVUPSmr:
case X86::VMOVAPDmr:
case X86::VMOVUPDmr:
case X86::VMOVDQAmr:
case X86::VMOVDQUmr:
case X86::VMOVUPSZ128mr:
case X86::VMOVAPSZ128mr:
case X86::VMOVUPSZ128mr_NOVLX:
case X86::VMOVAPSZ128mr_NOVLX:
case X86::VMOVUPDZ128mr:
case X86::VMOVAPDZ128mr:
case X86::VMOVDQA32Z128mr:
case X86::VMOVDQU32Z128mr:
case X86::VMOVDQA64Z128mr:
case X86::VMOVDQU64Z128mr:
case X86::VMOVDQU8Z128mr:
case X86::VMOVDQU16Z128mr:
  MemBytes = 16;
  return true;
case X86::VMOVUPSYmr:
case X86::VMOVAPSYmr:
case X86::VMOVUPDYmr:
case X86::VMOVAPDYmr:
case X86::VMOVDQUYmr:
case X86::VMOVDQAYmr:
case X86::VMOVUPSZ256mr:
case X86::VMOVAPSZ256mr:
case X86::VMOVUPSZ256mr_NOVLX:
case X86::VMOVAPSZ256mr_NOVLX:
case X86::VMOVUPDZ256mr:
case X86::VMOVAPDZ256mr:
case X86::VMOVDQU8Z256mr:
case X86::VMOVDQU16Z256mr:
case X86::VMOVDQA32Z256mr:
case X86::VMOVDQU32Z256mr:
case X86::VMOVDQA64Z256mr:
case X86::VMOVDQU64Z256mr:
  MemBytes = 32;
  return true;
case X86::VMOVUPSZmr:
case X86::VMOVAPSZmr:
case X86::VMOVUPDZmr:
case X86::VMOVAPDZmr:
case X86::VMOVDQU8Zmr:
case X86::VMOVDQU16Zmr:
case X86::VMOVDQA32Zmr:
case X86::VMOVDQU32Zmr:
case X86::VMOVDQA64Zmr:
case X86::VMOVDQU64Zmr:
  MemBytes = 64;
  return true;
}
return false;
878}

880unsigned X86InstrInfo::isLoadFromStackSlot(const MachineInstr &MI,
                                         int &FrameIndex) const {
unsigned Dummy;
return X86InstrInfo::isLoadFromStackSlot(MI, FrameIndex, Dummy);
884}

886unsigned X86InstrInfo::isLoadFromStackSlot(const MachineInstr &MI,
                                         int &FrameIndex,
                                         unsigned &MemBytes) const {
if (isFrameLoadOpcode(MI.getOpcode(), MemBytes))
  if (MI.getOperand(0).getSubReg() == 0 && isFrameOperand(MI, 1, FrameIndex))
    return MI.getOperand(0).getReg();
return 0;
893}

895unsigned X86InstrInfo::isLoadFromStackSlotPostFE(const MachineInstr &MI,
                                               int &FrameIndex) const {
unsigned Dummy;
if (isFrameLoadOpcode(MI.getOpcode(), Dummy)) {
  unsigned Reg;
  if ((Reg = isLoadFromStackSlot(MI, FrameIndex)))
    return Reg;
  // Check for post-frame index elimination operations
  SmallVector<const MachineMemOperand *, 1> Accesses;
  if (hasLoadFromStackSlot(MI, Accesses)) {
    FrameIndex =
        cast<FixedStackPseudoSourceValue>(Accesses.front()->getPseudoValue())
            ->getFrameIndex();
    return MI.getOperand(0).getReg();
  }
}
return 0;
912}

914unsigned X86InstrInfo::isStoreToStackSlot(const MachineInstr &MI,
                                        int &FrameIndex) const {
unsigned Dummy;
return X86InstrInfo::isStoreToStackSlot(MI, FrameIndex, Dummy);
918}

920unsigned X86InstrInfo::isStoreToStackSlot(const MachineInstr &MI,
                                        int &FrameIndex,
                                        unsigned &MemBytes) const {
if (isFrameStoreOpcode(MI.getOpcode(), MemBytes))
  if (MI.getOperand(X86::AddrNumOperands).getSubReg() == 0 &&
      isFrameOperand(MI, 0, FrameIndex))
    return MI.getOperand(X86::AddrNumOperands).getReg();
return 0;
928}

930unsigned X86InstrInfo::isStoreToStackSlotPostFE(const MachineInstr &MI,
                                              int &FrameIndex) const {
unsigned Dummy;
if (isFrameStoreOpcode(MI.getOpcode(), Dummy)) {
  unsigned Reg;
  if ((Reg = isStoreToStackSlot(MI, FrameIndex)))
    return Reg;
  // Check for post-frame index elimination operations
  SmallVector<const MachineMemOperand *, 1> Accesses;
  if (hasStoreToStackSlot(MI, Accesses)) {
    FrameIndex =
        cast<FixedStackPseudoSourceValue>(Accesses.front()->getPseudoValue())
            ->getFrameIndex();
    return MI.getOperand(X86::AddrNumOperands).getReg();
  }
}
return 0;
947}

949/// Return true if register is PIC base; i.e.g defined by X86::MOVPC32r.
950static bool regIsPICBase(Register BaseReg, const MachineRegisterInfo &MRI) {
// Don't waste compile time scanning use-def chains of physregs.
if (!BaseReg.isVirtual())
  return false;
bool isPICBase = false;
for (MachineRegisterInfo::def_instr_iterator I = MRI.def_instr_begin(BaseReg),
       E = MRI.def_instr_end(); I != E; ++I) {
  MachineInstr *DefMI = &*I;
  if (DefMI->getOpcode() != X86::MOVPC32r)
    return false;
  assert(!isPICBase && "More than one PIC base?")((void)0);
  isPICBase = true;
}
return isPICBase;
964}

966bool X86InstrInfo::isReallyTriviallyReMaterializable(const MachineInstr &MI,
                                                   AAResults *AA) const {
switch (MI.getOpcode()) {
default:
  // This function should only be called for opcodes with the ReMaterializable
  // flag set.
  llvm_unreachable("Unknown rematerializable operation!")__builtin_unreachable();
  break;

case X86::LOAD_STACK_GUARD:
case X86::AVX1_SETALLONES:
case X86::AVX2_SETALLONES:
case X86::AVX512_128_SET0:
case X86::AVX512_256_SET0:
case X86::AVX512_512_SET0:
case X86::AVX512_512_SETALLONES:
case X86::AVX512_FsFLD0SD:
case X86::AVX512_FsFLD0SS:
case X86::AVX512_FsFLD0F128:
case X86::AVX_SET0:
case X86::FsFLD0SD:
case X86::FsFLD0SS:
case X86::FsFLD0F128:
case X86::KSET0D:
case X86::KSET0Q:
case X86::KSET0W:
case X86::KSET1D:
case X86::KSET1Q:
case X86::KSET1W:
case X86::MMX_SET0:
case X86::MOV32ImmSExti8:
case X86::MOV32r0:
case X86::MOV32r1:
case X86::MOV32r_1:
case X86::MOV32ri64:
case X86::MOV64ImmSExti8:
case X86::V_SET0:
case X86::V_SETALLONES:
case X86::MOV16ri:
case X86::MOV32ri:
case X86::MOV64ri:
case X86::MOV64ri32:
case X86::MOV8ri:
case X86::PTILEZEROV:
  return true;

case X86::MOV8rm:
case X86::MOV8rm_NOREX:
case X86::MOV16rm:
case X86::MOV32rm:
case X86::MOV64rm:
case X86::MOVSSrm:
case X86::MOVSSrm_alt:
case X86::MOVSDrm:
case X86::MOVSDrm_alt:
case X86::MOVAPSrm:
case X86::MOVUPSrm:
case X86::MOVAPDrm:
case X86::MOVUPDrm:
case X86::MOVDQArm:
case X86::MOVDQUrm:
case X86::VMOVSSrm:
case X86::VMOVSSrm_alt:
case X86::VMOVSDrm:
case X86::VMOVSDrm_alt:
case X86::VMOVAPSrm:
case X86::VMOVUPSrm:
case X86::VMOVAPDrm:
case X86::VMOVUPDrm:
case X86::VMOVDQArm:
case X86::VMOVDQUrm:
case X86::VMOVAPSYrm:
case X86::VMOVUPSYrm:
case X86::VMOVAPDYrm:
case X86::VMOVUPDYrm:
case X86::VMOVDQAYrm:
case X86::VMOVDQUYrm:
case X86::MMX_MOVD64rm:
case X86::MMX_MOVQ64rm:
// AVX-512
case X86::VMOVSSZrm:
case X86::VMOVSSZrm_alt:
case X86::VMOVSDZrm:
case X86::VMOVSDZrm_alt:
case X86::VMOVAPDZ128rm:
case X86::VMOVAPDZ256rm:
case X86::VMOVAPDZrm:
case X86::VMOVAPSZ128rm:
case X86::VMOVAPSZ256rm:
case X86::VMOVAPSZ128rm_NOVLX:
case X86::VMOVAPSZ256rm_NOVLX:
case X86::VMOVAPSZrm:
case X86::VMOVDQA32Z128rm:
case X86::VMOVDQA32Z256rm:
case X86::VMOVDQA32Zrm:
case X86::VMOVDQA64Z128rm:
case X86::VMOVDQA64Z256rm:
case X86::VMOVDQA64Zrm:
case X86::VMOVDQU16Z128rm:
case X86::VMOVDQU16Z256rm:
case X86::VMOVDQU16Zrm:
case X86::VMOVDQU32Z128rm:
case X86::VMOVDQU32Z256rm:
case X86::VMOVDQU32Zrm:
case X86::VMOVDQU64Z128rm:
case X86::VMOVDQU64Z256rm:
case X86::VMOVDQU64Zrm:
case X86::VMOVDQU8Z128rm:
case X86::VMOVDQU8Z256rm:
case X86::VMOVDQU8Zrm:
case X86::VMOVUPDZ128rm:
case X86::VMOVUPDZ256rm:
case X86::VMOVUPDZrm:
case X86::VMOVUPSZ128rm:
case X86::VMOVUPSZ256rm:
case X86::VMOVUPSZ128rm_NOVLX:
case X86::VMOVUPSZ256rm_NOVLX:
case X86::VMOVUPSZrm: {
  // Loads from constant pools are trivially rematerializable.
  if (MI.getOperand(1 + X86::AddrBaseReg).isReg() &&
      MI.getOperand(1 + X86::AddrScaleAmt).isImm() &&
      MI.getOperand(1 + X86::AddrIndexReg).isReg() &&
      MI.getOperand(1 + X86::AddrIndexReg).getReg() == 0 &&
      MI.isDereferenceableInvariantLoad(AA)) {
    Register BaseReg = MI.getOperand(1 + X86::AddrBaseReg).getReg();
    if (BaseReg == 0 || BaseReg == X86::RIP)
      return true;
    // Allow re-materialization of PIC load.
    if (!ReMatPICStubLoad && MI.getOperand(1 + X86::AddrDisp).isGlobal())
      return false;
    const MachineFunction &MF = *MI.getParent()->getParent();
    const MachineRegisterInfo &MRI = MF.getRegInfo();
    return regIsPICBase(BaseReg, MRI);
  }
  return false;
}

case X86::LEA32r:
case X86::LEA64r: {
  if (MI.getOperand(1 + X86::AddrScaleAmt).isImm() &&
      MI.getOperand(1 + X86::AddrIndexReg).isReg() &&
      MI.getOperand(1 + X86::AddrIndexReg).getReg() == 0 &&
      !MI.getOperand(1 + X86::AddrDisp).isReg()) {
    // lea fi#, lea GV, etc. are all rematerializable.
    if (!MI.getOperand(1 + X86::AddrBaseReg).isReg())
      return true;
    Register BaseReg = MI.getOperand(1 + X86::AddrBaseReg).getReg();
    if (BaseReg == 0)
      return true;
    // Allow re-materialization of lea PICBase + x.
    const MachineFunction &MF = *MI.getParent()->getParent();
    const MachineRegisterInfo &MRI = MF.getRegInfo();
    return regIsPICBase(BaseReg, MRI);
  }
  return false;
}
}
1123}

1125void X86InstrInfo::reMaterialize(MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator I,
                               Register DestReg, unsigned SubIdx,
                               const MachineInstr &Orig,
                               const TargetRegisterInfo &TRI) const {
bool ClobbersEFLAGS = Orig.modifiesRegister(X86::EFLAGS, &TRI);
if (ClobbersEFLAGS && MBB.computeRegisterLiveness(&TRI, X86::EFLAGS, I) !=
                          MachineBasicBlock::LQR_Dead) {
  // The instruction clobbers EFLAGS. Re-materialize as MOV32ri to avoid side
  // effects.
  int Value;
  switch (Orig.getOpcode()) {
  case X86::MOV32r0:  Value = 0; break;
  case X86::MOV32r1:  Value = 1; break;
  case X86::MOV32r_1: Value = -1; break;
  default:
    llvm_unreachable("Unexpected instruction!")__builtin_unreachable();
  }

  const DebugLoc &DL = Orig.getDebugLoc();
  BuildMI(MBB, I, DL, get(X86::MOV32ri))
      .add(Orig.getOperand(0))
      .addImm(Value);
} else {
  MachineInstr *MI = MBB.getParent()->CloneMachineInstr(&Orig);
  MBB.insert(I, MI);
}

MachineInstr &NewMI = *std::prev(I);
NewMI.substituteRegister(Orig.getOperand(0).getReg(), DestReg, SubIdx, TRI);
1155}

1157/// True if MI has a condition code def, e.g. EFLAGS, that is not marked dead.
1158bool X86InstrInfo::hasLiveCondCodeDef(MachineInstr &MI) const {
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
  MachineOperand &MO = MI.getOperand(i);
  if (MO.isReg() && MO.isDef() &&
      MO.getReg() == X86::EFLAGS && !MO.isDead()) {
    return true;
  }
}
return false;
1167}

1169/// Check whether the shift count for a machine operand is non-zero.
1170inline static unsigned getTruncatedShiftCount(const MachineInstr &MI,
                                            unsigned ShiftAmtOperandIdx) {
// The shift count is six bits with the REX.W prefix and five bits without.
unsigned ShiftCountMask = (MI.getDesc().TSFlags & X86II::REX_W) ? 63 : 31;
unsigned Imm = MI.getOperand(ShiftAmtOperandIdx).getImm();
return Imm & ShiftCountMask;
1176}

1178/// Check whether the given shift count is appropriate
1179/// can be represented by a LEA instruction.
1180inline static bool isTruncatedShiftCountForLEA(unsigned ShAmt) {
// Left shift instructions can be transformed into load-effective-address
// instructions if we can encode them appropriately.
// A LEA instruction utilizes a SIB byte to encode its scale factor.
// The SIB.scale field is two bits wide which means that we can encode any
// shift amount less than 4.
return ShAmt < 4 && ShAmt > 0;
1187}

1189bool X86InstrInfo::classifyLEAReg(MachineInstr &MI, const MachineOperand &Src,
                                unsigned Opc, bool AllowSP, Register &NewSrc,
                                bool &isKill, MachineOperand &ImplicitOp,
                                LiveVariables *LV) const {
MachineFunction &MF = *MI.getParent()->getParent();
const TargetRegisterClass *RC;
if (AllowSP) {
  RC = Opc != X86::LEA32r ? &X86::GR64RegClass : &X86::GR32RegClass;
} else {
  RC = Opc != X86::LEA32r ?
    &X86::GR64_NOSPRegClass : &X86::GR32_NOSPRegClass;
}
Register SrcReg = Src.getReg();

// For both LEA64 and LEA32 the register already has essentially the right
// type (32-bit or 64-bit) we may just need to forbid SP.
if (Opc != X86::LEA64_32r) {
  NewSrc = SrcReg;
  isKill = Src.isKill();
  assert(!Src.isUndef() && "Undef op doesn't need optimization")((void)0);

  if (NewSrc.isVirtual() && !MF.getRegInfo().constrainRegClass(NewSrc, RC))
    return false;

  return true;
}

// This is for an LEA64_32r and incoming registers are 32-bit. One way or
// another we need to add 64-bit registers to the final MI.
if (SrcReg.isPhysical()) {
  ImplicitOp = Src;
  ImplicitOp.setImplicit();

  NewSrc = getX86SubSuperRegister(Src.getReg(), 64);
  isKill = Src.isKill();
  assert(!Src.isUndef() && "Undef op doesn't need optimization")((void)0);
} else {
  // Virtual register of the wrong class, we have to create a temporary 64-bit
  // vreg to feed into the LEA.
  NewSrc = MF.getRegInfo().createVirtualRegister(RC);
  MachineInstr *Copy =
      BuildMI(*MI.getParent(), MI, MI.getDebugLoc(), get(TargetOpcode::COPY))
          .addReg(NewSrc, RegState::Define | RegState::Undef, X86::sub_32bit)
          .add(Src);

  // Which is obviously going to be dead after we're done with it.
  isKill = true;

  if (LV)
    LV->replaceKillInstruction(SrcReg, MI, *Copy);
}

// We've set all the parameters without issue.
return true;
1243}

1245MachineInstr *X86InstrInfo::convertToThreeAddressWithLEA(
  unsigned MIOpc, MachineFunction::iterator &MFI, MachineInstr &MI,
  LiveVariables *LV, bool Is8BitOp) const {
// We handle 8-bit adds and various 16-bit opcodes in the switch below.
MachineRegisterInfo &RegInfo = MFI->getParent()->getRegInfo();
assert((Is8BitOp || RegInfo.getTargetRegisterInfo()->getRegSizeInBits(((void)0)
            *RegInfo.getRegClass(MI.getOperand(0).getReg())) == 16) &&((void)0)
       "Unexpected type for LEA transform")((void)0);

// TODO: For a 32-bit target, we need to adjust the LEA variables with
// something like this:
//   Opcode = X86::LEA32r;
//   InRegLEA = RegInfo.createVirtualRegister(&X86::GR32_NOSPRegClass);
//   OutRegLEA =
//       Is8BitOp ? RegInfo.createVirtualRegister(&X86::GR32ABCD_RegClass)
//                : RegInfo.createVirtualRegister(&X86::GR32RegClass);
if (!Subtarget.is64Bit())
  return nullptr;

unsigned Opcode = X86::LEA64_32r;
Register InRegLEA = RegInfo.createVirtualRegister(&X86::GR64_NOSPRegClass);
Register OutRegLEA = RegInfo.createVirtualRegister(&X86::GR32RegClass);

// Build and insert into an implicit UNDEF value. This is OK because
// we will be shifting and then extracting the lower 8/16-bits.
// This has the potential to cause partial register stall. e.g.
//   movw    (%rbp,%rcx,2), %dx
//   leal    -65(%rdx), %esi
// But testing has shown this *does* help performance in 64-bit mode (at
// least on modern x86 machines).
MachineBasicBlock::iterator MBBI = MI.getIterator();
Register Dest = MI.getOperand(0).getReg();
Register Src = MI.getOperand(1).getReg();
bool IsDead = MI.getOperand(0).isDead();
bool IsKill = MI.getOperand(1).isKill();
unsigned SubReg = Is8BitOp ? X86::sub_8bit : X86::sub_16bit;
assert(!MI.getOperand(1).isUndef() && "Undef op doesn't need optimization")((void)0);
BuildMI(*MFI, MBBI, MI.getDebugLoc(), get(X86::IMPLICIT_DEF), InRegLEA);
MachineInstr *InsMI =
    BuildMI(*MFI, MBBI, MI.getDebugLoc(), get(TargetOpcode::COPY))
        .addReg(InRegLEA, RegState::Define, SubReg)
        .addReg(Src, getKillRegState(IsKill));

MachineInstrBuilder MIB =
    BuildMI(*MFI, MBBI, MI.getDebugLoc(), get(Opcode), OutRegLEA);
switch (MIOpc) {
default: llvm_unreachable("Unreachable!")__builtin_unreachable();
case X86::SHL8ri:
case X86::SHL16ri: {
  unsigned ShAmt = MI.getOperand(2).getImm();
  MIB.addReg(0).addImm(1ULL << ShAmt)
     .addReg(InRegLEA, RegState::Kill).addImm(0).addReg(0);
  break;
}
case X86::INC8r:
case X86::INC16r:
  addRegOffset(MIB, InRegLEA, true, 1);
  break;
case X86::DEC8r:
case X86::DEC16r:
  addRegOffset(MIB, InRegLEA, true, -1);
  break;
case X86::ADD8ri:
case X86::ADD8ri_DB:
case X86::ADD16ri:
case X86::ADD16ri8:
case X86::ADD16ri_DB:
case X86::ADD16ri8_DB:
  addRegOffset(MIB, InRegLEA, true, MI.getOperand(2).getImm());
  break;
case X86::ADD8rr:
case X86::ADD8rr_DB:
case X86::ADD16rr:
case X86::ADD16rr_DB: {
  Register Src2 = MI.getOperand(2).getReg();
  bool IsKill2 = MI.getOperand(2).isKill();
  assert(!MI.getOperand(2).isUndef() && "Undef op doesn't need optimization")((void)0);
  unsigned InRegLEA2 = 0;
  MachineInstr *InsMI2 = nullptr;
  if (Src == Src2) {
    // ADD8rr/ADD16rr killed %reg1028, %reg1028
    // just a single insert_subreg.
    addRegReg(MIB, InRegLEA, true, InRegLEA, false);
  } else {
    if (Subtarget.is64Bit())
      InRegLEA2 = RegInfo.createVirtualRegister(&X86::GR64_NOSPRegClass);
    else
      InRegLEA2 = RegInfo.createVirtualRegister(&X86::GR32_NOSPRegClass);
    // Build and insert into an implicit UNDEF value. This is OK because
    // we will be shifting and then extracting the lower 8/16-bits.
    BuildMI(*MFI, &*MIB, MI.getDebugLoc(), get(X86::IMPLICIT_DEF), InRegLEA2);
    InsMI2 = BuildMI(*MFI, &*MIB, MI.getDebugLoc(), get(TargetOpcode::COPY))
                 .addReg(InRegLEA2, RegState::Define, SubReg)
                 .addReg(Src2, getKillRegState(IsKill2));
    addRegReg(MIB, InRegLEA, true, InRegLEA2, true);
  }
  if (LV && IsKill2 && InsMI2)
    LV->replaceKillInstruction(Src2, MI, *InsMI2);
  break;
}
}

MachineInstr *NewMI = MIB;
MachineInstr *ExtMI =
    BuildMI(*MFI, MBBI, MI.getDebugLoc(), get(TargetOpcode::COPY))
        .addReg(Dest, RegState::Define | getDeadRegState(IsDead))
        .addReg(OutRegLEA, RegState::Kill, SubReg);

if (LV) {
  // Update live variables.
  LV->getVarInfo(InRegLEA).Kills.push_back(NewMI);
  LV->getVarInfo(OutRegLEA).Kills.push_back(ExtMI);
  if (IsKill)
    LV->replaceKillInstruction(Src, MI, *InsMI);
  if (IsDead)
    LV->replaceKillInstruction(Dest, MI, *ExtMI);
}

return ExtMI;
1364}

1366/// This method must be implemented by targets that
1367/// set the M_CONVERTIBLE_TO_3_ADDR flag.  When this flag is set, the target
1368/// may be able to convert a two-address instruction into a true
1369/// three-address instruction on demand.  This allows the X86 target (for
1370/// example) to convert ADD and SHL instructions into LEA instructions if they
1371/// would require register copies due to two-addressness.
1372///
1373/// This method returns a null pointer if the transformation cannot be
1374/// performed, otherwise it returns the new instruction.
1375///
1376MachineInstr *
1377X86InstrInfo::convertToThreeAddress(MachineFunction::iterator &MFI,
                                  MachineInstr &MI, LiveVariables *LV) const {
// The following opcodes also sets the condition code register(s). Only
// convert them to equivalent lea if the condition code register def's
// are dead!
if (hasLiveCondCodeDef(MI))
  return nullptr;

MachineFunction &MF = *MI.getParent()->getParent();
// All instructions input are two-addr instructions.  Get the known operands.
const MachineOperand &Dest = MI.getOperand(0);
const MachineOperand &Src = MI.getOperand(1);

// Ideally, operations with undef should be folded before we get here, but we
// can't guarantee it. Bail out because optimizing undefs is a waste of time.
// Without this, we have to forward undef state to new register operands to
// avoid machine verifier errors.
if (Src.isUndef())
  return nullptr;
if (MI.getNumOperands() > 2)
  if (MI.getOperand(2).isReg() && MI.getOperand(2).isUndef())
    return nullptr;

MachineInstr *NewMI = nullptr;
bool Is64Bit = Subtarget.is64Bit();

bool Is8BitOp = false;
unsigned MIOpc = MI.getOpcode();
switch (MIOpc) {
default: llvm_unreachable("Unreachable!")__builtin_unreachable();
case X86::SHL64ri: {
  assert(MI.getNumOperands() >= 3 && "Unknown shift instruction!")((void)0);
  unsigned ShAmt = getTruncatedShiftCount(MI, 2);
  if (!isTruncatedShiftCountForLEA(ShAmt)) return nullptr;

  // LEA can't handle RSP.
  if (Src.getReg().isVirtual() && !MF.getRegInfo().constrainRegClass(
                                      Src.getReg(), &X86::GR64_NOSPRegClass))
    return nullptr;

  NewMI = BuildMI(MF, MI.getDebugLoc(), get(X86::LEA64r))
              .add(Dest)
              .addReg(0)
              .addImm(1ULL << ShAmt)
              .add(Src)
              .addImm(0)
              .addReg(0);
  break;
}
case X86::SHL32ri: {
  assert(MI.getNumOperands() >= 3 && "Unknown shift instruction!")((void)0);
  unsigned ShAmt = getTruncatedShiftCount(MI, 2);
  if (!isTruncatedShiftCountForLEA(ShAmt)) return nullptr;

  unsigned Opc = Is64Bit ? X86::LEA64_32r : X86::LEA32r;

  // LEA can't handle ESP.
  bool isKill;
  Register SrcReg;
  MachineOperand ImplicitOp = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src, Opc, /*AllowSP=*/ false,
                      SrcReg, isKill, ImplicitOp, LV))
    return nullptr;

  MachineInstrBuilder MIB =
      BuildMI(MF, MI.getDebugLoc(), get(Opc))
          .add(Dest)
          .addReg(0)
          .addImm(1ULL << ShAmt)
          .addReg(SrcReg, getKillRegState(isKill))
          .addImm(0)
          .addReg(0);
  if (ImplicitOp.getReg() != 0)
    MIB.add(ImplicitOp);
  NewMI = MIB;

  break;
}
case X86::SHL8ri:
  Is8BitOp = true;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case X86::SHL16ri: {
  assert(MI.getNumOperands() >= 3 && "Unknown shift instruction!")((void)0);
  unsigned ShAmt = getTruncatedShiftCount(MI, 2);
  if (!isTruncatedShiftCountForLEA(ShAmt))
    return nullptr;
  return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp);
}
case X86::INC64r:
case X86::INC32r: {
  assert(MI.getNumOperands() >= 2 && "Unknown inc instruction!")((void)0);
  unsigned Opc = MIOpc == X86::INC64r ? X86::LEA64r :
      (Is64Bit ? X86::LEA64_32r : X86::LEA32r);
  bool isKill;
  Register SrcReg;
  MachineOperand ImplicitOp = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src, Opc, /*AllowSP=*/ false, SrcReg, isKill,
                      ImplicitOp, LV))
    return nullptr;

  MachineInstrBuilder MIB =
      BuildMI(MF, MI.getDebugLoc(), get(Opc))
          .add(Dest)
          .addReg(SrcReg, getKillRegState(isKill));
  if (ImplicitOp.getReg() != 0)
    MIB.add(ImplicitOp);

  NewMI = addOffset(MIB, 1);
  break;
}
case X86::DEC64r:
case X86::DEC32r: {
  assert(MI.getNumOperands() >= 2 && "Unknown dec instruction!")((void)0);
  unsigned Opc = MIOpc == X86::DEC64r ? X86::LEA64r
      : (Is64Bit ? X86::LEA64_32r : X86::LEA32r);

  bool isKill;
  Register SrcReg;
  MachineOperand ImplicitOp = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src, Opc, /*AllowSP=*/ false, SrcReg, isKill,
                      ImplicitOp, LV))
    return nullptr;

  MachineInstrBuilder MIB = BuildMI(MF, MI.getDebugLoc(), get(Opc))
                                .add(Dest)
                                .addReg(SrcReg, getKillRegState(isKill));
  if (ImplicitOp.getReg() != 0)
    MIB.add(ImplicitOp);

  NewMI = addOffset(MIB, -1);

  break;
}
case X86::DEC8r:
case X86::INC8r:
  Is8BitOp = true;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case X86::DEC16r:
case X86::INC16r:
  return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp);
case X86::ADD64rr:
case X86::ADD64rr_DB:
case X86::ADD32rr:
case X86::ADD32rr_DB: {
  assert(MI.getNumOperands() >= 3 && "Unknown add instruction!")((void)0);
  unsigned Opc;
  if (MIOpc == X86::ADD64rr || MIOpc == X86::ADD64rr_DB)
    Opc = X86::LEA64r;
  else
    Opc = Is64Bit ? X86::LEA64_32r : X86::LEA32r;

  bool isKill;
  Register SrcReg;
  MachineOperand ImplicitOp = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src, Opc, /*AllowSP=*/ true,
                      SrcReg, isKill, ImplicitOp, LV))
    return nullptr;

  const MachineOperand &Src2 = MI.getOperand(2);
  bool isKill2;
  Register SrcReg2;
  MachineOperand ImplicitOp2 = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src2, Opc, /*AllowSP=*/ false,
                      SrcReg2, isKill2, ImplicitOp2, LV))
    return nullptr;

  MachineInstrBuilder MIB = BuildMI(MF, MI.getDebugLoc(), get(Opc)).add(Dest);
  if (ImplicitOp.getReg() != 0)
    MIB.add(ImplicitOp);
  if (ImplicitOp2.getReg() != 0)
    MIB.add(ImplicitOp2);

  NewMI = addRegReg(MIB, SrcReg, isKill, SrcReg2, isKill2);
  if (LV && Src2.isKill())
    LV->replaceKillInstruction(SrcReg2, MI, *NewMI);
  break;
}
case X86::ADD8rr:
case X86::ADD8rr_DB:
  Is8BitOp = true;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case X86::ADD16rr:
case X86::ADD16rr_DB:
  return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp);
case X86::ADD64ri32:
case X86::ADD64ri8:
case X86::ADD64ri32_DB:
case X86::ADD64ri8_DB:
  assert(MI.getNumOperands() >= 3 && "Unknown add instruction!")((void)0);
  NewMI = addOffset(
      BuildMI(MF, MI.getDebugLoc(), get(X86::LEA64r)).add(Dest).add(Src),
      MI.getOperand(2));
  break;
case X86::ADD32ri:
case X86::ADD32ri8:
case X86::ADD32ri_DB:
case X86::ADD32ri8_DB: {
  assert(MI.getNumOperands() >= 3 && "Unknown add instruction!")((void)0);
  unsigned Opc = Is64Bit ? X86::LEA64_32r : X86::LEA32r;

  bool isKill;
  Register SrcReg;
  MachineOperand ImplicitOp = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src, Opc, /*AllowSP=*/ true,
                      SrcReg, isKill, ImplicitOp, LV))
    return nullptr;

  MachineInstrBuilder MIB = BuildMI(MF, MI.getDebugLoc(), get(Opc))
                                .add(Dest)
                                .addReg(SrcReg, getKillRegState(isKill));
  if (ImplicitOp.getReg() != 0)
    MIB.add(ImplicitOp);

  NewMI = addOffset(MIB, MI.getOperand(2));
  break;
}
case X86::ADD8ri:
case X86::ADD8ri_DB:
  Is8BitOp = true;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case X86::ADD16ri:
case X86::ADD16ri8:
case X86::ADD16ri_DB:
case X86::ADD16ri8_DB:
  return convertToThreeAddressWithLEA(MIOpc, MFI, MI, LV, Is8BitOp);
case X86::SUB8ri:
case X86::SUB16ri8:
case X86::SUB16ri:
  /// FIXME: Support these similar to ADD8ri/ADD16ri*.
  return nullptr;
case X86::SUB32ri8:
case X86::SUB32ri: {
  if (!MI.getOperand(2).isImm())
    return nullptr;
  int64_t Imm = MI.getOperand(2).getImm();
  if (!isInt<32>(-Imm))
    return nullptr;

  assert(MI.getNumOperands() >= 3 && "Unknown add instruction!")((void)0);
  unsigned Opc = Is64Bit ? X86::LEA64_32r : X86::LEA32r;

  bool isKill;
  Register SrcReg;
  MachineOperand ImplicitOp = MachineOperand::CreateReg(0, false);
  if (!classifyLEAReg(MI, Src, Opc, /*AllowSP=*/ true,
                      SrcReg, isKill, ImplicitOp, LV))
    return nullptr;

  MachineInstrBuilder MIB = BuildMI(MF, MI.getDebugLoc(), get(Opc))
                                .add(Dest)
                                .addReg(SrcReg, getKillRegState(isKill));
  if (ImplicitOp.getReg() != 0)
    MIB.add(ImplicitOp);

  NewMI = addOffset(MIB, -Imm);
  break;
}

case X86::SUB64ri8:
case X86::SUB64ri32: {
  if (!MI.getOperand(2).isImm())
    return nullptr;
  int64_t Imm = MI.getOperand(2).getImm();
  if (!isInt<32>(-Imm))
    return nullptr;

  assert(MI.getNumOperands() >= 3 && "Unknown sub instruction!")((void)0);

  MachineInstrBuilder MIB = BuildMI(MF, MI.getDebugLoc(),
                                    get(X86::LEA64r)).add(Dest).add(Src);
  NewMI = addOffset(MIB, -Imm);
  break;
}

case X86::VMOVDQU8Z128rmk:
case X86::VMOVDQU8Z256rmk:
case X86::VMOVDQU8Zrmk:
case X86::VMOVDQU16Z128rmk:
case X86::VMOVDQU16Z256rmk:
case X86::VMOVDQU16Zrmk:
case X86::VMOVDQU32Z128rmk: case X86::VMOVDQA32Z128rmk:
case X86::VMOVDQU32Z256rmk: case X86::VMOVDQA32Z256rmk:
case X86::VMOVDQU32Zrmk:    case X86::VMOVDQA32Zrmk:
case X86::VMOVDQU64Z128rmk: case X86::VMOVDQA64Z128rmk:
case X86::VMOVDQU64Z256rmk: case X86::VMOVDQA64Z256rmk:
case X86::VMOVDQU64Zrmk:    case X86::VMOVDQA64Zrmk:
case X86::VMOVUPDZ128rmk:   case X86::VMOVAPDZ128rmk:
case X86::VMOVUPDZ256rmk:   case X86::VMOVAPDZ256rmk:
case X86::VMOVUPDZrmk:      case X86::VMOVAPDZrmk:
case X86::VMOVUPSZ128rmk:   case X86::VMOVAPSZ128rmk:
case X86::VMOVUPSZ256rmk:   case X86::VMOVAPSZ256rmk:
case X86::VMOVUPSZrmk:      case X86::VMOVAPSZrmk:
case X86::VBROADCASTSDZ256rmk:
case X86::VBROADCASTSDZrmk:
case X86::VBROADCASTSSZ128rmk:
case X86::VBROADCASTSSZ256rmk:
case X86::VBROADCASTSSZrmk:
case X86::VPBROADCASTDZ128rmk:
case X86::VPBROADCASTDZ256rmk:
case X86::VPBROADCASTDZrmk:
case X86::VPBROADCASTQZ128rmk:
case X86::VPBROADCASTQZ256rmk:
case X86::VPBROADCASTQZrmk: {
  unsigned Opc;
  switch (MIOpc) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::VMOVDQU8Z128rmk:     Opc = X86::VPBLENDMBZ128rmk; break;
  case X86::VMOVDQU8Z256rmk:     Opc = X86::VPBLENDMBZ256rmk; break;
  case X86::VMOVDQU8Zrmk:        Opc = X86::VPBLENDMBZrmk;    break;
  case X86::VMOVDQU16Z128rmk:    Opc = X86::VPBLENDMWZ128rmk; break;
  case X86::VMOVDQU16Z256rmk:    Opc = X86::VPBLENDMWZ256rmk; break;
  case X86::VMOVDQU16Zrmk:       Opc = X86::VPBLENDMWZrmk;    break;
  case X86::VMOVDQU32Z128rmk:    Opc = X86::VPBLENDMDZ128rmk; break;
  case X86::VMOVDQU32Z256rmk:    Opc = X86::VPBLENDMDZ256rmk; break;
  case X86::VMOVDQU32Zrmk:       Opc = X86::VPBLENDMDZrmk;    break;
  case X86::VMOVDQU64Z128rmk:    Opc = X86::VPBLENDMQZ128rmk; break;
  case X86::VMOVDQU64Z256rmk:    Opc = X86::VPBLENDMQZ256rmk; break;
  case X86::VMOVDQU64Zrmk:       Opc = X86::VPBLENDMQZrmk;    break;
  case X86::VMOVUPDZ128rmk:      Opc = X86::VBLENDMPDZ128rmk; break;
  case X86::VMOVUPDZ256rmk:      Opc = X86::VBLENDMPDZ256rmk; break;
  case X86::VMOVUPDZrmk:         Opc = X86::VBLENDMPDZrmk;    break;
  case X86::VMOVUPSZ128rmk:      Opc = X86::VBLENDMPSZ128rmk; break;
  case X86::VMOVUPSZ256rmk:      Opc = X86::VBLENDMPSZ256rmk; break;
  case X86::VMOVUPSZrmk:         Opc = X86::VBLENDMPSZrmk;    break;
  case X86::VMOVDQA32Z128rmk:    Opc = X86::VPBLENDMDZ128rmk; break;
  case X86::VMOVDQA32Z256rmk:    Opc = X86::VPBLENDMDZ256rmk; break;
  case X86::VMOVDQA32Zrmk:       Opc = X86::VPBLENDMDZrmk;    break;
  case X86::VMOVDQA64Z128rmk:    Opc = X86::VPBLENDMQZ128rmk; break;
  case X86::VMOVDQA64Z256rmk:    Opc = X86::VPBLENDMQZ256rmk; break;
  case X86::VMOVDQA64Zrmk:       Opc = X86::VPBLENDMQZrmk;    break;
  case X86::VMOVAPDZ128rmk:      Opc = X86::VBLENDMPDZ128rmk; break;
  case X86::VMOVAPDZ256rmk:      Opc = X86::VBLENDMPDZ256rmk; break;
  case X86::VMOVAPDZrmk:         Opc = X86::VBLENDMPDZrmk;    break;
  case X86::VMOVAPSZ128rmk:      Opc = X86::VBLENDMPSZ128rmk; break;
  case X86::VMOVAPSZ256rmk:      Opc = X86::VBLENDMPSZ256rmk; break;
  case X86::VMOVAPSZrmk:         Opc = X86::VBLENDMPSZrmk;    break;
  case X86::VBROADCASTSDZ256rmk: Opc = X86::VBLENDMPDZ256rmbk; break;
  case X86::VBROADCASTSDZrmk:    Opc = X86::VBLENDMPDZrmbk;    break;
  case X86::VBROADCASTSSZ128rmk: Opc = X86::VBLENDMPSZ128rmbk; break;
  case X86::VBROADCASTSSZ256rmk: Opc = X86::VBLENDMPSZ256rmbk; break;
  case X86::VBROADCASTSSZrmk:    Opc = X86::VBLENDMPSZrmbk;    break;
  case X86::VPBROADCASTDZ128rmk: Opc = X86::VPBLENDMDZ128rmbk; break;
  case X86::VPBROADCASTDZ256rmk: Opc = X86::VPBLENDMDZ256rmbk; break;
  case X86::VPBROADCASTDZrmk:    Opc = X86::VPBLENDMDZrmbk;    break;
  case X86::VPBROADCASTQZ128rmk: Opc = X86::VPBLENDMQZ128rmbk; break;
  case X86::VPBROADCASTQZ256rmk: Opc = X86::VPBLENDMQZ256rmbk; break;
  case X86::VPBROADCASTQZrmk:    Opc = X86::VPBLENDMQZrmbk;    break;
  }

  NewMI = BuildMI(MF, MI.getDebugLoc(), get(Opc))
            .add(Dest)
            .add(MI.getOperand(2))
            .add(Src)
            .add(MI.getOperand(3))
            .add(MI.getOperand(4))
            .add(MI.getOperand(5))
            .add(MI.getOperand(6))
            .add(MI.getOperand(7));
  break;
}

case X86::VMOVDQU8Z128rrk:
case X86::VMOVDQU8Z256rrk:
case X86::VMOVDQU8Zrrk:
case X86::VMOVDQU16Z128rrk:
case X86::VMOVDQU16Z256rrk:
case X86::VMOVDQU16Zrrk:
case X86::VMOVDQU32Z128rrk: case X86::VMOVDQA32Z128rrk:
case X86::VMOVDQU32Z256rrk: case X86::VMOVDQA32Z256rrk:
case X86::VMOVDQU32Zrrk:    case X86::VMOVDQA32Zrrk:
case X86::VMOVDQU64Z128rrk: case X86::VMOVDQA64Z128rrk:
case X86::VMOVDQU64Z256rrk: case X86::VMOVDQA64Z256rrk:
case X86::VMOVDQU64Zrrk:    case X86::VMOVDQA64Zrrk:
case X86::VMOVUPDZ128rrk:   case X86::VMOVAPDZ128rrk:
case X86::VMOVUPDZ256rrk:   case X86::VMOVAPDZ256rrk:
case X86::VMOVUPDZrrk:      case X86::VMOVAPDZrrk:
case X86::VMOVUPSZ128rrk:   case X86::VMOVAPSZ128rrk:
case X86::VMOVUPSZ256rrk:   case X86::VMOVAPSZ256rrk:
case X86::VMOVUPSZrrk:      case X86::VMOVAPSZrrk: {
  unsigned Opc;
  switch (MIOpc) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::VMOVDQU8Z128rrk:  Opc = X86::VPBLENDMBZ128rrk; break;
  case X86::VMOVDQU8Z256rrk:  Opc = X86::VPBLENDMBZ256rrk; break;
  case X86::VMOVDQU8Zrrk:     Opc = X86::VPBLENDMBZrrk;    break;
  case X86::VMOVDQU16Z128rrk: Opc = X86::VPBLENDMWZ128rrk; break;
  case X86::VMOVDQU16Z256rrk: Opc = X86::VPBLENDMWZ256rrk; break;
  case X86::VMOVDQU16Zrrk:    Opc = X86::VPBLENDMWZrrk;    break;
  case X86::VMOVDQU32Z128rrk: Opc = X86::VPBLENDMDZ128rrk; break;
  case X86::VMOVDQU32Z256rrk: Opc = X86::VPBLENDMDZ256rrk; break;
  case X86::VMOVDQU32Zrrk:    Opc = X86::VPBLENDMDZrrk;    break;
  case X86::VMOVDQU64Z128rrk: Opc = X86::VPBLENDMQZ128rrk; break;
  case X86::VMOVDQU64Z256rrk: Opc = X86::VPBLENDMQZ256rrk; break;
  case X86::VMOVDQU64Zrrk:    Opc = X86::VPBLENDMQZrrk;    break;
  case X86::VMOVUPDZ128rrk:   Opc = X86::VBLENDMPDZ128rrk; break;
  case X86::VMOVUPDZ256rrk:   Opc = X86::VBLENDMPDZ256rrk; break;
  case X86::VMOVUPDZrrk:      Opc = X86::VBLENDMPDZrrk;    break;
  case X86::VMOVUPSZ128rrk:   Opc = X86::VBLENDMPSZ128rrk; break;
  case X86::VMOVUPSZ256rrk:   Opc = X86::VBLENDMPSZ256rrk; break;
  case X86::VMOVUPSZrrk:      Opc = X86::VBLENDMPSZrrk;    break;
  case X86::VMOVDQA32Z128rrk: Opc = X86::VPBLENDMDZ128rrk; break;
  case X86::VMOVDQA32Z256rrk: Opc = X86::VPBLENDMDZ256rrk; break;
  case X86::VMOVDQA32Zrrk:    Opc = X86::VPBLENDMDZrrk;    break;
  case X86::VMOVDQA64Z128rrk: Opc = X86::VPBLENDMQZ128rrk; break;
  case X86::VMOVDQA64Z256rrk: Opc = X86::VPBLENDMQZ256rrk; break;
  case X86::VMOVDQA64Zrrk:    Opc = X86::VPBLENDMQZrrk;    break;
  case X86::VMOVAPDZ128rrk:   Opc = X86::VBLENDMPDZ128rrk; break;
  case X86::VMOVAPDZ256rrk:   Opc = X86::VBLENDMPDZ256rrk; break;
  case X86::VMOVAPDZrrk:      Opc = X86::VBLENDMPDZrrk;    break;
  case X86::VMOVAPSZ128rrk:   Opc = X86::VBLENDMPSZ128rrk; break;
  case X86::VMOVAPSZ256rrk:   Opc = X86::VBLENDMPSZ256rrk; break;
  case X86::VMOVAPSZrrk:      Opc = X86::VBLENDMPSZrrk;    break;
  }

  NewMI = BuildMI(MF, MI.getDebugLoc(), get(Opc))
            .add(Dest)
            .add(MI.getOperand(2))
            .add(Src)
            .add(MI.getOperand(3));
  break;
}
}

if (!NewMI) return nullptr;

if (LV) {  // Update live variables
  if (Src.isKill())
    LV->replaceKillInstruction(Src.getReg(), MI, *NewMI);
  if (Dest.isDead())
    LV->replaceKillInstruction(Dest.getReg(), MI, *NewMI);
}

MFI->insert(MI.getIterator(), NewMI); // Insert the new inst
return NewMI;
1811}

1813/// This determines which of three possible cases of a three source commute
1814/// the source indexes correspond to taking into account any mask operands.
1815/// All prevents commuting a passthru operand. Returns -1 if the commute isn't
1816/// possible.
1817/// Case 0 - Possible to commute the first and second operands.
1818/// Case 1 - Possible to commute the first and third operands.
1819/// Case 2 - Possible to commute the second and third operands.
1820static unsigned getThreeSrcCommuteCase(uint64_t TSFlags, unsigned SrcOpIdx1,
                                     unsigned SrcOpIdx2) {
// Put the lowest index to SrcOpIdx1 to simplify the checks below.
if (SrcOpIdx1 > SrcOpIdx2)
  std::swap(SrcOpIdx1, SrcOpIdx2);

unsigned Op1 = 1, Op2 = 2, Op3 = 3;
if (X86II::isKMasked(TSFlags)) {
  Op2++;
  Op3++;
}

if (SrcOpIdx1 == Op1 && SrcOpIdx2 == Op2)
  return 0;
if (SrcOpIdx1 == Op1 && SrcOpIdx2 == Op3)
  return 1;
if (SrcOpIdx1 == Op2 && SrcOpIdx2 == Op3)
  return 2;
llvm_unreachable("Unknown three src commute case.")__builtin_unreachable();
1839}

1841unsigned X86InstrInfo::getFMA3OpcodeToCommuteOperands(
  const MachineInstr &MI, unsigned SrcOpIdx1, unsigned SrcOpIdx2,
  const X86InstrFMA3Group &FMA3Group) const {

unsigned Opc = MI.getOpcode();

// TODO: Commuting the 1st operand of FMA*_Int requires some additional
// analysis. The commute optimization is legal only if all users of FMA*_Int
// use only the lowest element of the FMA*_Int instruction. Such analysis are
// not implemented yet. So, just return 0 in that case.
// When such analysis are available this place will be the right place for
// calling it.
assert(!(FMA3Group.isIntrinsic() && (SrcOpIdx1 == 1 || SrcOpIdx2 == 1)) &&((void)0)
       "Intrinsic instructions can't commute operand 1")((void)0);

// Determine which case this commute is or if it can't be done.
unsigned Case = getThreeSrcCommuteCase(MI.getDesc().TSFlags, SrcOpIdx1,
                                       SrcOpIdx2);
assert(Case < 3 && "Unexpected case number!")((void)0);

// Define the FMA forms mapping array that helps to map input FMA form
// to output FMA form to preserve the operation semantics after
// commuting the operands.
const unsigned Form132Index = 0;
const unsigned Form213Index = 1;
const unsigned Form231Index = 2;
static const unsigned FormMapping[][3] = {
  // 0: SrcOpIdx1 == 1 && SrcOpIdx2 == 2;
  // FMA132 A, C, b; ==> FMA231 C, A, b;
  // FMA213 B, A, c; ==> FMA213 A, B, c;
  // FMA231 C, A, b; ==> FMA132 A, C, b;
  { Form231Index, Form213Index, Form132Index },
  // 1: SrcOpIdx1 == 1 && SrcOpIdx2 == 3;
  // FMA132 A, c, B; ==> FMA132 B, c, A;
  // FMA213 B, a, C; ==> FMA231 C, a, B;
  // FMA231 C, a, B; ==> FMA213 B, a, C;
  { Form132Index, Form231Index, Form213Index },
  // 2: SrcOpIdx1 == 2 && SrcOpIdx2 == 3;
  // FMA132 a, C, B; ==> FMA213 a, B, C;
  // FMA213 b, A, C; ==> FMA132 b, C, A;
  // FMA231 c, A, B; ==> FMA231 c, B, A;
  { Form213Index, Form132Index, Form231Index }
};

unsigned FMAForms[3];
FMAForms[0] = FMA3Group.get132Opcode();
FMAForms[1] = FMA3Group.get213Opcode();
FMAForms[2] = FMA3Group.get231Opcode();
unsigned FormIndex;
for (FormIndex = 0; FormIndex < 3; FormIndex++)
  if (Opc == FMAForms[FormIndex])
    break;

// Everything is ready, just adjust the FMA opcode and return it.
FormIndex = FormMapping[Case][FormIndex];
return FMAForms[FormIndex];
1897}

1899static void commuteVPTERNLOG(MachineInstr &MI, unsigned SrcOpIdx1,
                           unsigned SrcOpIdx2) {
// Determine which case this commute is or if it can't be done.
unsigned Case = getThreeSrcCommuteCase(MI.getDesc().TSFlags, SrcOpIdx1,
                                       SrcOpIdx2);
assert(Case < 3 && "Unexpected case value!")((void)0);

// For each case we need to swap two pairs of bits in the final immediate.
static const uint8_t SwapMasks[3][4] = {
  { 0x04, 0x10, 0x08, 0x20 }, // Swap bits 2/4 and 3/5.
  { 0x02, 0x10, 0x08, 0x40 }, // Swap bits 1/4 and 3/6.
  { 0x02, 0x04, 0x20, 0x40 }, // Swap bits 1/2 and 5/6.
};

uint8_t Imm = MI.getOperand(MI.getNumOperands()-1).getImm();
// Clear out the bits we are swapping.
uint8_t NewImm = Imm & ~(SwapMasks[Case][0] | SwapMasks[Case][1] |
                         SwapMasks[Case][2] | SwapMasks[Case][3]);
// If the immediate had a bit of the pair set, then set the opposite bit.
if (Imm & SwapMasks[Case][0]) NewImm |= SwapMasks[Case][1];
if (Imm & SwapMasks[Case][1]) NewImm |= SwapMasks[Case][0];
if (Imm & SwapMasks[Case][2]) NewImm |= SwapMasks[Case][3];
if (Imm & SwapMasks[Case][3]) NewImm |= SwapMasks[Case][2];
MI.getOperand(MI.getNumOperands()-1).setImm(NewImm);
1923}

1925// Returns true if this is a VPERMI2 or VPERMT2 instruction that can be
1926// commuted.
1927static bool isCommutableVPERMV3Instruction(unsigned Opcode) {
1928#define VPERM_CASES(Suffix) \
case X86::VPERMI2##Suffix##128rr:    case X86::VPERMT2##Suffix##128rr:    \
case X86::VPERMI2##Suffix##256rr:    case X86::VPERMT2##Suffix##256rr:    \
case X86::VPERMI2##Suffix##rr:       case X86::VPERMT2##Suffix##rr:       \
case X86::VPERMI2##Suffix##128rm:    case X86::VPERMT2##Suffix##128rm:    \
case X86::VPERMI2##Suffix##256rm:    case X86::VPERMT2##Suffix##256rm:    \
case X86::VPERMI2##Suffix##rm:       case X86::VPERMT2##Suffix##rm:       \
case X86::VPERMI2##Suffix##128rrkz:  case X86::VPERMT2##Suffix##128rrkz:  \
case X86::VPERMI2##Suffix##256rrkz:  case X86::VPERMT2##Suffix##256rrkz:  \
case X86::VPERMI2##Suffix##rrkz:     case X86::VPERMT2##Suffix##rrkz:     \
case X86::VPERMI2##Suffix##128rmkz:  case X86::VPERMT2##Suffix##128rmkz:  \
case X86::VPERMI2##Suffix##256rmkz:  case X86::VPERMT2##Suffix##256rmkz:  \
case X86::VPERMI2##Suffix##rmkz:     case X86::VPERMT2##Suffix##rmkz:

1942#define VPERM_CASES_BROADCAST(Suffix) \
VPERM_CASES(Suffix) \
case X86::VPERMI2##Suffix##128rmb:   case X86::VPERMT2##Suffix##128rmb:   \
case X86::VPERMI2##Suffix##256rmb:   case X86::VPERMT2##Suffix##256rmb:   \
case X86::VPERMI2##Suffix##rmb:      case X86::VPERMT2##Suffix##rmb:      \
case X86::VPERMI2##Suffix##128rmbkz: case X86::VPERMT2##Suffix##128rmbkz: \
case X86::VPERMI2##Suffix##256rmbkz: case X86::VPERMT2##Suffix##256rmbkz: \
case X86::VPERMI2##Suffix##rmbkz:    case X86::VPERMT2##Suffix##rmbkz:

switch (Opcode) {
default: return false;
VPERM_CASES(B)
VPERM_CASES_BROADCAST(D)
VPERM_CASES_BROADCAST(PD)
VPERM_CASES_BROADCAST(PS)
VPERM_CASES_BROADCAST(Q)
VPERM_CASES(W)
  return true;
}
1961#undef VPERM_CASES_BROADCAST
1962#undef VPERM_CASES
1963}

1965// Returns commuted opcode for VPERMI2 and VPERMT2 instructions by switching
1966// from the I opcode to the T opcode and vice versa.
1967static unsigned getCommutedVPERMV3Opcode(unsigned Opcode) {
1968#define VPERM_CASES(Orig, New) \
case X86::Orig##128rr:    return X86::New##128rr;   \
case X86::Orig##128rrkz:  return X86::New##128rrkz; \
case X86::Orig##128rm:    return X86::New##128rm;   \
case X86::Orig##128rmkz:  return X86::New##128rmkz; \
case X86::Orig##256rr:    return X86::New##256rr;   \
case X86::Orig##256rrkz:  return X86::New##256rrkz; \
case X86::Orig##256rm:    return X86::New##256rm;   \
case X86::Orig##256rmkz:  return X86::New##256rmkz; \
case X86::Orig##rr:       return X86::New##rr;      \
case X86::Orig##rrkz:     return X86::New##rrkz;    \
case X86::Orig##rm:       return X86::New##rm;      \
case X86::Orig##rmkz:     return X86::New##rmkz;

1982#define VPERM_CASES_BROADCAST(Orig, New) \
VPERM_CASES(Orig, New) \
case X86::Orig##128rmb:   return X86::New##128rmb;   \
case X86::Orig##128rmbkz: return X86::New##128rmbkz; \
case X86::Orig##256rmb:   return X86::New##256rmb;   \
case X86::Orig##256rmbkz: return X86::New##256rmbkz; \
case X86::Orig##rmb:      return X86::New##rmb;      \
case X86::Orig##rmbkz:    return X86::New##rmbkz;

switch (Opcode) {
VPERM_CASES(VPERMI2B, VPERMT2B)
VPERM_CASES_BROADCAST(VPERMI2D,  VPERMT2D)
VPERM_CASES_BROADCAST(VPERMI2PD, VPERMT2PD)
VPERM_CASES_BROADCAST(VPERMI2PS, VPERMT2PS)
VPERM_CASES_BROADCAST(VPERMI2Q,  VPERMT2Q)
VPERM_CASES(VPERMI2W, VPERMT2W)
VPERM_CASES(VPERMT2B, VPERMI2B)
VPERM_CASES_BROADCAST(VPERMT2D,  VPERMI2D)
VPERM_CASES_BROADCAST(VPERMT2PD, VPERMI2PD)
VPERM_CASES_BROADCAST(VPERMT2PS, VPERMI2PS)
VPERM_CASES_BROADCAST(VPERMT2Q,  VPERMI2Q)
VPERM_CASES(VPERMT2W, VPERMI2W)
}

llvm_unreachable("Unreachable!")__builtin_unreachable();
2007#undef VPERM_CASES_BROADCAST
2008#undef VPERM_CASES
2009}

2011MachineInstr *X86InstrInfo::commuteInstructionImpl(MachineInstr &MI, bool NewMI,
                                                 unsigned OpIdx1,
                                                 unsigned OpIdx2) const {
auto cloneIfNew = [NewMI](MachineInstr &MI) -> MachineInstr & {
  if (NewMI)
    return *MI.getParent()->getParent()->CloneMachineInstr(&MI);
  return MI;
};

switch (MI.getOpcode()) {
case X86::SHRD16rri8: // A = SHRD16rri8 B, C, I -> A = SHLD16rri8 C, B, (16-I)
case X86::SHLD16rri8: // A = SHLD16rri8 B, C, I -> A = SHRD16rri8 C, B, (16-I)
case X86::SHRD32rri8: // A = SHRD32rri8 B, C, I -> A = SHLD32rri8 C, B, (32-I)
case X86::SHLD32rri8: // A = SHLD32rri8 B, C, I -> A = SHRD32rri8 C, B, (32-I)
case X86::SHRD64rri8: // A = SHRD64rri8 B, C, I -> A = SHLD64rri8 C, B, (64-I)
case X86::SHLD64rri8:{// A = SHLD64rri8 B, C, I -> A = SHRD64rri8 C, B, (64-I)
  unsigned Opc;
  unsigned Size;
  switch (MI.getOpcode()) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::SHRD16rri8: Size = 16; Opc = X86::SHLD16rri8; break;
  case X86::SHLD16rri8: Size = 16; Opc = X86::SHRD16rri8; break;
  case X86::SHRD32rri8: Size = 32; Opc = X86::SHLD32rri8; break;
  case X86::SHLD32rri8: Size = 32; Opc = X86::SHRD32rri8; break;
  case X86::SHRD64rri8: Size = 64; Opc = X86::SHLD64rri8; break;
  case X86::SHLD64rri8: Size = 64; Opc = X86::SHRD64rri8; break;
  }
  unsigned Amt = MI.getOperand(3).getImm();
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.setDesc(get(Opc));
  WorkingMI.getOperand(3).setImm(Size - Amt);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::PFSUBrr:
case X86::PFSUBRrr: {
  // PFSUB  x, y: x = x - y
  // PFSUBR x, y: x = y - x
  unsigned Opc =
      (X86::PFSUBRrr == MI.getOpcode() ? X86::PFSUBrr : X86::PFSUBRrr);
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.setDesc(get(Opc));
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::BLENDPDrri:
case X86::BLENDPSrri:
case X86::VBLENDPDrri:
case X86::VBLENDPSrri:
  // If we're optimizing for size, try to use MOVSD/MOVSS.
  if (MI.getParent()->getParent()->getFunction().hasOptSize()) {
    unsigned Mask, Opc;
    switch (MI.getOpcode()) {
    default: llvm_unreachable("Unreachable!")__builtin_unreachable();
    case X86::BLENDPDrri:  Opc = X86::MOVSDrr;  Mask = 0x03; break;
    case X86::BLENDPSrri:  Opc = X86::MOVSSrr;  Mask = 0x0F; break;
    case X86::VBLENDPDrri: Opc = X86::VMOVSDrr; Mask = 0x03; break;
    case X86::VBLENDPSrri: Opc = X86::VMOVSSrr; Mask = 0x0F; break;
    }
    if ((MI.getOperand(3).getImm() ^ Mask) == 1) {
      auto &WorkingMI = cloneIfNew(MI);
      WorkingMI.setDesc(get(Opc));
      WorkingMI.RemoveOperand(3);
      return TargetInstrInfo::commuteInstructionImpl(WorkingMI,
                                                     /*NewMI=*/false,
                                                     OpIdx1, OpIdx2);
    }
  }
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case X86::PBLENDWrri:
case X86::VBLENDPDYrri:
case X86::VBLENDPSYrri:
case X86::VPBLENDDrri:
case X86::VPBLENDWrri:
case X86::VPBLENDDYrri:
case X86::VPBLENDWYrri:{
  int8_t Mask;
  switch (MI.getOpcode()) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::BLENDPDrri:    Mask = (int8_t)0x03; break;
  case X86::BLENDPSrri:    Mask = (int8_t)0x0F; break;
  case X86::PBLENDWrri:    Mask = (int8_t)0xFF; break;
  case X86::VBLENDPDrri:   Mask = (int8_t)0x03; break;
  case X86::VBLENDPSrri:   Mask = (int8_t)0x0F; break;
  case X86::VBLENDPDYrri:  Mask = (int8_t)0x0F; break;
  case X86::VBLENDPSYrri:  Mask = (int8_t)0xFF; break;
  case X86::VPBLENDDrri:   Mask = (int8_t)0x0F; break;
  case X86::VPBLENDWrri:   Mask = (int8_t)0xFF; break;
  case X86::VPBLENDDYrri:  Mask = (int8_t)0xFF; break;
  case X86::VPBLENDWYrri:  Mask = (int8_t)0xFF; break;
  }
  // Only the least significant bits of Imm are used.
  // Using int8_t to ensure it will be sign extended to the int64_t that
  // setImm takes in order to match isel behavior.
  int8_t Imm = MI.getOperand(3).getImm() & Mask;
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.getOperand(3).setImm(Mask ^ Imm);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::INSERTPSrr:
case X86::VINSERTPSrr:
case X86::VINSERTPSZrr: {
  unsigned Imm = MI.getOperand(MI.getNumOperands() - 1).getImm();
  unsigned ZMask = Imm & 15;
  unsigned DstIdx = (Imm >> 4) & 3;
  unsigned SrcIdx = (Imm >> 6) & 3;

  // We can commute insertps if we zero 2 of the elements, the insertion is
  // "inline" and we don't override the insertion with a zero.
  if (DstIdx == SrcIdx && (ZMask & (1 << DstIdx)) == 0 &&
      countPopulation(ZMask) == 2) {
    unsigned AltIdx = findFirstSet((ZMask | (1 << DstIdx)) ^ 15);
    assert(AltIdx < 4 && "Illegal insertion index")((void)0);
    unsigned AltImm = (AltIdx << 6) | (AltIdx << 4) | ZMask;
    auto &WorkingMI = cloneIfNew(MI);
    WorkingMI.getOperand(MI.getNumOperands() - 1).setImm(AltImm);
    return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                   OpIdx1, OpIdx2);
  }
  return nullptr;
}
case X86::MOVSDrr:
case X86::MOVSSrr:
case X86::VMOVSDrr:
case X86::VMOVSSrr:{
  // On SSE41 or later we can commute a MOVSS/MOVSD to a BLENDPS/BLENDPD.
  if (Subtarget.hasSSE41()) {
    unsigned Mask, Opc;
    switch (MI.getOpcode()) {
    default: llvm_unreachable("Unreachable!")__builtin_unreachable();
    case X86::MOVSDrr:  Opc = X86::BLENDPDrri;  Mask = 0x02; break;
    case X86::MOVSSrr:  Opc = X86::BLENDPSrri;  Mask = 0x0E; break;
    case X86::VMOVSDrr: Opc = X86::VBLENDPDrri; Mask = 0x02; break;
    case X86::VMOVSSrr: Opc = X86::VBLENDPSrri; Mask = 0x0E; break;
    }

    auto &WorkingMI = cloneIfNew(MI);
    WorkingMI.setDesc(get(Opc));
    WorkingMI.addOperand(MachineOperand::CreateImm(Mask));
    return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                   OpIdx1, OpIdx2);
  }

  // Convert to SHUFPD.
  assert(MI.getOpcode() == X86::MOVSDrr &&((void)0)
         "Can only commute MOVSDrr without SSE4.1")((void)0);

  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.setDesc(get(X86::SHUFPDrri));
  WorkingMI.addOperand(MachineOperand::CreateImm(0x02));
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::SHUFPDrri: {
  // Commute to MOVSD.
  assert(MI.getOperand(3).getImm() == 0x02 && "Unexpected immediate!")((void)0);
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.setDesc(get(X86::MOVSDrr));
  WorkingMI.RemoveOperand(3);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::PCLMULQDQrr:
case X86::VPCLMULQDQrr:
case X86::VPCLMULQDQYrr:
case X86::VPCLMULQDQZrr:
case X86::VPCLMULQDQZ128rr:
case X86::VPCLMULQDQZ256rr: {
  // SRC1 64bits = Imm[0] ? SRC1[127:64] : SRC1[63:0]
  // SRC2 64bits = Imm[4] ? SRC2[127:64] : SRC2[63:0]
  unsigned Imm = MI.getOperand(3).getImm();
  unsigned Src1Hi = Imm & 0x01;
  unsigned Src2Hi = Imm & 0x10;
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.getOperand(3).setImm((Src1Hi << 4) | (Src2Hi >> 4));
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::VPCMPBZ128rri:  case X86::VPCMPUBZ128rri:
case X86::VPCMPBZ256rri:  case X86::VPCMPUBZ256rri:
case X86::VPCMPBZrri:     case X86::VPCMPUBZrri:
case X86::VPCMPDZ128rri:  case X86::VPCMPUDZ128rri:
case X86::VPCMPDZ256rri:  case X86::VPCMPUDZ256rri:
case X86::VPCMPDZrri:     case X86::VPCMPUDZrri:
case X86::VPCMPQZ128rri:  case X86::VPCMPUQZ128rri:
case X86::VPCMPQZ256rri:  case X86::VPCMPUQZ256rri:
case X86::VPCMPQZrri:     case X86::VPCMPUQZrri:
case X86::VPCMPWZ128rri:  case X86::VPCMPUWZ128rri:
case X86::VPCMPWZ256rri:  case X86::VPCMPUWZ256rri:
case X86::VPCMPWZrri:     case X86::VPCMPUWZrri:
case X86::VPCMPBZ128rrik: case X86::VPCMPUBZ128rrik:
case X86::VPCMPBZ256rrik: case X86::VPCMPUBZ256rrik:
case X86::VPCMPBZrrik:    case X86::VPCMPUBZrrik:
case X86::VPCMPDZ128rrik: case X86::VPCMPUDZ128rrik:
case X86::VPCMPDZ256rrik: case X86::VPCMPUDZ256rrik:
case X86::VPCMPDZrrik:    case X86::VPCMPUDZrrik:
case X86::VPCMPQZ128rrik: case X86::VPCMPUQZ128rrik:
case X86::VPCMPQZ256rrik: case X86::VPCMPUQZ256rrik:
case X86::VPCMPQZrrik:    case X86::VPCMPUQZrrik:
case X86::VPCMPWZ128rrik: case X86::VPCMPUWZ128rrik:
case X86::VPCMPWZ256rrik: case X86::VPCMPUWZ256rrik:
case X86::VPCMPWZrrik:    case X86::VPCMPUWZrrik: {
  // Flip comparison mode immediate (if necessary).
  unsigned Imm = MI.getOperand(MI.getNumOperands() - 1).getImm() & 0x7;
  Imm = X86::getSwappedVPCMPImm(Imm);
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.getOperand(MI.getNumOperands() - 1).setImm(Imm);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::VPCOMBri: case X86::VPCOMUBri:
case X86::VPCOMDri: case X86::VPCOMUDri:
case X86::VPCOMQri: case X86::VPCOMUQri:
case X86::VPCOMWri: case X86::VPCOMUWri: {
  // Flip comparison mode immediate (if necessary).
  unsigned Imm = MI.getOperand(3).getImm() & 0x7;
  Imm = X86::getSwappedVPCOMImm(Imm);
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.getOperand(3).setImm(Imm);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::VCMPSDZrr:
case X86::VCMPSSZrr:
case X86::VCMPPDZrri:
case X86::VCMPPSZrri:
case X86::VCMPPDZ128rri:
case X86::VCMPPSZ128rri:
case X86::VCMPPDZ256rri:
case X86::VCMPPSZ256rri:
case X86::VCMPPDZrrik:
case X86::VCMPPSZrrik:
case X86::VCMPPDZ128rrik:
case X86::VCMPPSZ128rrik:
case X86::VCMPPDZ256rrik:
case X86::VCMPPSZ256rrik: {
  unsigned Imm =
              MI.getOperand(MI.getNumExplicitOperands() - 1).getImm() & 0x1f;
  Imm = X86::getSwappedVCMPImm(Imm);
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.getOperand(MI.getNumExplicitOperands() - 1).setImm(Imm);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::VPERM2F128rr:
case X86::VPERM2I128rr: {
  // Flip permute source immediate.
  // Imm & 0x02: lo = if set, select Op1.lo/hi else Op0.lo/hi.
  // Imm & 0x20: hi = if set, select Op1.lo/hi else Op0.lo/hi.
  int8_t Imm = MI.getOperand(3).getImm() & 0xFF;
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.getOperand(3).setImm(Imm ^ 0x22);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::MOVHLPSrr:
case X86::UNPCKHPDrr:
case X86::VMOVHLPSrr:
case X86::VUNPCKHPDrr:
case X86::VMOVHLPSZrr:
case X86::VUNPCKHPDZ128rr: {
  assert(Subtarget.hasSSE2() && "Commuting MOVHLP/UNPCKHPD requires SSE2!")((void)0);

  unsigned Opc = MI.getOpcode();
  switch (Opc) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::MOVHLPSrr:       Opc = X86::UNPCKHPDrr;      break;
  case X86::UNPCKHPDrr:      Opc = X86::MOVHLPSrr;       break;
  case X86::VMOVHLPSrr:      Opc = X86::VUNPCKHPDrr;     break;
  case X86::VUNPCKHPDrr:     Opc = X86::VMOVHLPSrr;      break;
  case X86::VMOVHLPSZrr:     Opc = X86::VUNPCKHPDZ128rr; break;
  case X86::VUNPCKHPDZ128rr: Opc = X86::VMOVHLPSZrr;     break;
  }
  auto &WorkingMI = cloneIfNew(MI);
  WorkingMI.setDesc(get(Opc));
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::CMOV16rr:  case X86::CMOV32rr:  case X86::CMOV64rr: {
  auto &WorkingMI = cloneIfNew(MI);
  unsigned OpNo = MI.getDesc().getNumOperands() - 1;
  X86::CondCode CC = static_cast<X86::CondCode>(MI.getOperand(OpNo).getImm());
  WorkingMI.getOperand(OpNo).setImm(X86::GetOppositeBranchCondition(CC));
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
case X86::VPTERNLOGDZrri:      case X86::VPTERNLOGDZrmi:
case X86::VPTERNLOGDZ128rri:   case X86::VPTERNLOGDZ128rmi:
case X86::VPTERNLOGDZ256rri:   case X86::VPTERNLOGDZ256rmi:
case X86::VPTERNLOGQZrri:      case X86::VPTERNLOGQZrmi:
case X86::VPTERNLOGQZ128rri:   case X86::VPTERNLOGQZ128rmi:
case X86::VPTERNLOGQZ256rri:   case X86::VPTERNLOGQZ256rmi:
case X86::VPTERNLOGDZrrik:
case X86::VPTERNLOGDZ128rrik:
case X86::VPTERNLOGDZ256rrik:
case X86::VPTERNLOGQZrrik:
case X86::VPTERNLOGQZ128rrik:
case X86::VPTERNLOGQZ256rrik:
case X86::VPTERNLOGDZrrikz:    case X86::VPTERNLOGDZrmikz:
case X86::VPTERNLOGDZ128rrikz: case X86::VPTERNLOGDZ128rmikz:
case X86::VPTERNLOGDZ256rrikz: case X86::VPTERNLOGDZ256rmikz:
case X86::VPTERNLOGQZrrikz:    case X86::VPTERNLOGQZrmikz:
case X86::VPTERNLOGQZ128rrikz: case X86::VPTERNLOGQZ128rmikz:
case X86::VPTERNLOGQZ256rrikz: case X86::VPTERNLOGQZ256rmikz:
case X86::VPTERNLOGDZ128rmbi:
case X86::VPTERNLOGDZ256rmbi:
case X86::VPTERNLOGDZrmbi:
case X86::VPTERNLOGQZ128rmbi:
case X86::VPTERNLOGQZ256rmbi:
case X86::VPTERNLOGQZrmbi:
case X86::VPTERNLOGDZ128rmbikz:
case X86::VPTERNLOGDZ256rmbikz:
case X86::VPTERNLOGDZrmbikz:
case X86::VPTERNLOGQZ128rmbikz:
case X86::VPTERNLOGQZ256rmbikz:
case X86::VPTERNLOGQZrmbikz: {
  auto &WorkingMI = cloneIfNew(MI);
  commuteVPTERNLOG(WorkingMI, OpIdx1, OpIdx2);
  return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                 OpIdx1, OpIdx2);
}
default: {
  if (isCommutableVPERMV3Instruction(MI.getOpcode())) {
    unsigned Opc = getCommutedVPERMV3Opcode(MI.getOpcode());
    auto &WorkingMI = cloneIfNew(MI);
    WorkingMI.setDesc(get(Opc));
    return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                   OpIdx1, OpIdx2);
  }

  const X86InstrFMA3Group *FMA3Group = getFMA3Group(MI.getOpcode(),
                                                    MI.getDesc().TSFlags);
  if (FMA3Group) {
    unsigned Opc =
      getFMA3OpcodeToCommuteOperands(MI, OpIdx1, OpIdx2, *FMA3Group);
    auto &WorkingMI = cloneIfNew(MI);
    WorkingMI.setDesc(get(Opc));
    return TargetInstrInfo::commuteInstructionImpl(WorkingMI, /*NewMI=*/false,
                                                   OpIdx1, OpIdx2);
  }

  return TargetInstrInfo::commuteInstructionImpl(MI, NewMI, OpIdx1, OpIdx2);
}
}
2356}

2358bool
2359X86InstrInfo::findThreeSrcCommutedOpIndices(const MachineInstr &MI,
                                          unsigned &SrcOpIdx1,
                                          unsigned &SrcOpIdx2,
                                          bool IsIntrinsic) const {
uint64_t TSFlags = MI.getDesc().TSFlags;

unsigned FirstCommutableVecOp = 1;
unsigned LastCommutableVecOp = 3;
unsigned KMaskOp = -1U;
if (X86II::isKMasked(TSFlags)) {
  // For k-zero-masked operations it is Ok to commute the first vector
  // operand. Unless this is an intrinsic instruction.
  // For regular k-masked operations a conservative choice is done as the
  // elements of the first vector operand, for which the corresponding bit
  // in the k-mask operand is set to 0, are copied to the result of the
  // instruction.
  // TODO/FIXME: The commute still may be legal if it is known that the
  // k-mask operand is set to either all ones or all zeroes.
  // It is also Ok to commute the 1st operand if all users of MI use only
  // the elements enabled by the k-mask operand. For example,
  //   v4 = VFMADD213PSZrk v1, k, v2, v3; // v1[i] = k[i] ? v2[i]*v1[i]+v3[i]
  //                                                     : v1[i];
  //   VMOVAPSZmrk <mem_addr>, k, v4; // this is the ONLY user of v4 ->
  //                                  // Ok, to commute v1 in FMADD213PSZrk.

  // The k-mask operand has index = 2 for masked and zero-masked operations.
  KMaskOp = 2;

  // The operand with index = 1 is used as a source for those elements for
  // which the corresponding bit in the k-mask is set to 0.
  if (X86II::isKMergeMasked(TSFlags) || IsIntrinsic)
    FirstCommutableVecOp = 3;

  LastCommutableVecOp++;
} else if (IsIntrinsic) {
  // Commuting the first operand of an intrinsic instruction isn't possible
  // unless we can prove that only the lowest element of the result is used.
  FirstCommutableVecOp = 2;
}

if (isMem(MI, LastCommutableVecOp))
  LastCommutableVecOp--;

// Only the first RegOpsNum operands are commutable.
// Also, the value 'CommuteAnyOperandIndex' is valid here as it means
// that the operand is not specified/fixed.
if (SrcOpIdx1 != CommuteAnyOperandIndex &&
    (SrcOpIdx1 < FirstCommutableVecOp || SrcOpIdx1 > LastCommutableVecOp ||
     SrcOpIdx1 == KMaskOp))
  return false;
if (SrcOpIdx2 != CommuteAnyOperandIndex &&
    (SrcOpIdx2 < FirstCommutableVecOp || SrcOpIdx2 > LastCommutableVecOp ||
     SrcOpIdx2 == KMaskOp))
  return false;

// Look for two different register operands assumed to be commutable
// regardless of the FMA opcode. The FMA opcode is adjusted later.
if (SrcOpIdx1 == CommuteAnyOperandIndex ||
    SrcOpIdx2 == CommuteAnyOperandIndex) {
  unsigned CommutableOpIdx2 = SrcOpIdx2;

  // At least one of operands to be commuted is not specified and
  // this method is free to choose appropriate commutable operands.
  if (SrcOpIdx1 == SrcOpIdx2)
    // Both of operands are not fixed. By default set one of commutable
    // operands to the last register operand of the instruction.
    CommutableOpIdx2 = LastCommutableVecOp;
  else if (SrcOpIdx2 == CommuteAnyOperandIndex)
    // Only one of operands is not fixed.
    CommutableOpIdx2 = SrcOpIdx1;

  // CommutableOpIdx2 is well defined now. Let's choose another commutable
  // operand and assign its index to CommutableOpIdx1.
  Register Op2Reg = MI.getOperand(CommutableOpIdx2).getReg();

  unsigned CommutableOpIdx1;
  for (CommutableOpIdx1 = LastCommutableVecOp;
       CommutableOpIdx1 >= FirstCommutableVecOp; CommutableOpIdx1--) {
    // Just ignore and skip the k-mask operand.
    if (CommutableOpIdx1 == KMaskOp)
      continue;

    // The commuted operands must have different registers.
    // Otherwise, the commute transformation does not change anything and
    // is useless then.
    if (Op2Reg != MI.getOperand(CommutableOpIdx1).getReg())
      break;
  }

  // No appropriate commutable operands were found.
  if (CommutableOpIdx1 < FirstCommutableVecOp)
    return false;

  // Assign the found pair of commutable indices to SrcOpIdx1 and SrcOpidx2
  // to return those values.
  if (!fixCommutedOpIndices(SrcOpIdx1, SrcOpIdx2,
                            CommutableOpIdx1, CommutableOpIdx2))
    return false;
}

return true;
2460}

2462bool X86InstrInfo::findCommutedOpIndices(const MachineInstr &MI,
                                       unsigned &SrcOpIdx1,
                                       unsigned &SrcOpIdx2) const {
const MCInstrDesc &Desc = MI.getDesc();
if (!Desc.isCommutable())
  return false;

switch (MI.getOpcode()) {
case X86::CMPSDrr:
case X86::CMPSSrr:
case X86::CMPPDrri:
case X86::CMPPSrri:
case X86::VCMPSDrr:
case X86::VCMPSSrr:
case X86::VCMPPDrri:
case X86::VCMPPSrri:
case X86::VCMPPDYrri:
case X86::VCMPPSYrri:
case X86::VCMPSDZrr:
case X86::VCMPSSZrr:
case X86::VCMPPDZrri:
case X86::VCMPPSZrri:
case X86::VCMPPDZ128rri:
case X86::VCMPPSZ128rri:
case X86::VCMPPDZ256rri:
case X86::VCMPPSZ256rri:
case X86::VCMPPDZrrik:
case X86::VCMPPSZrrik:
case X86::VCMPPDZ128rrik:
case X86::VCMPPSZ128rrik:
case X86::VCMPPDZ256rrik:
case X86::VCMPPSZ256rrik: {
  unsigned OpOffset = X86II::isKMasked(Desc.TSFlags) ? 1 : 0;

  // Float comparison can be safely commuted for
  // Ordered/Unordered/Equal/NotEqual tests
  unsigned Imm = MI.getOperand(3 + OpOffset).getImm() & 0x7;
  switch (Imm) {
  default:
    // EVEX versions can be commuted.
    if ((Desc.TSFlags & X86II::EncodingMask) == X86II::EVEX)
      break;
    return false;
  case 0x00: // EQUAL
  case 0x03: // UNORDERED
  case 0x04: // NOT EQUAL
  case 0x07: // ORDERED
    break;
  }

  // The indices of the commutable operands are 1 and 2 (or 2 and 3
  // when masked).
  // Assign them to the returned operand indices here.
  return fixCommutedOpIndices(SrcOpIdx1, SrcOpIdx2, 1 + OpOffset,
                              2 + OpOffset);
}
case X86::MOVSSrr:
  // X86::MOVSDrr is always commutable. MOVSS is only commutable if we can
  // form sse4.1 blend. We assume VMOVSSrr/VMOVSDrr is always commutable since
  // AVX implies sse4.1.
  if (Subtarget.hasSSE41())
    return TargetInstrInfo::findCommutedOpIndices(MI, SrcOpIdx1, SrcOpIdx2);
  return false;
case X86::SHUFPDrri:
  // We can commute this to MOVSD.
  if (MI.getOperand(3).getImm() == 0x02)
    return TargetInstrInfo::findCommutedOpIndices(MI, SrcOpIdx1, SrcOpIdx2);
  return false;
case X86::MOVHLPSrr:
case X86::UNPCKHPDrr:
case X86::VMOVHLPSrr:
case X86::VUNPCKHPDrr:
case X86::VMOVHLPSZrr:
case X86::VUNPCKHPDZ128rr:
  if (Subtarget.hasSSE2())
    return TargetInstrInfo::findCommutedOpIndices(MI, SrcOpIdx1, SrcOpIdx2);
  return false;
case X86::VPTERNLOGDZrri:      case X86::VPTERNLOGDZrmi:
case X86::VPTERNLOGDZ128rri:   case X86::VPTERNLOGDZ128rmi:
case X86::VPTERNLOGDZ256rri:   case X86::VPTERNLOGDZ256rmi:
case X86::VPTERNLOGQZrri:      case X86::VPTERNLOGQZrmi:
case X86::VPTERNLOGQZ128rri:   case X86::VPTERNLOGQZ128rmi:
case X86::VPTERNLOGQZ256rri:   case X86::VPTERNLOGQZ256rmi:
case X86::VPTERNLOGDZrrik:
case X86::VPTERNLOGDZ128rrik:
case X86::VPTERNLOGDZ256rrik:
case X86::VPTERNLOGQZrrik:
case X86::VPTERNLOGQZ128rrik:
case X86::VPTERNLOGQZ256rrik:
case X86::VPTERNLOGDZrrikz:    case X86::VPTERNLOGDZrmikz:
case X86::VPTERNLOGDZ128rrikz: case X86::VPTERNLOGDZ128rmikz:
case X86::VPTERNLOGDZ256rrikz: case X86::VPTERNLOGDZ256rmikz:
case X86::VPTERNLOGQZrrikz:    case X86::VPTERNLOGQZrmikz:
case X86::VPTERNLOGQZ128rrikz: case X86::VPTERNLOGQZ128rmikz:
case X86::VPTERNLOGQZ256rrikz: case X86::VPTERNLOGQZ256rmikz:
case X86::VPTERNLOGDZ128rmbi:
case X86::VPTERNLOGDZ256rmbi:
case X86::VPTERNLOGDZrmbi:
case X86::VPTERNLOGQZ128rmbi:
case X86::VPTERNLOGQZ256rmbi:
case X86::VPTERNLOGQZrmbi:
case X86::VPTERNLOGDZ128rmbikz:
case X86::VPTERNLOGDZ256rmbikz:
case X86::VPTERNLOGDZrmbikz:
case X86::VPTERNLOGQZ128rmbikz:
case X86::VPTERNLOGQZ256rmbikz:
case X86::VPTERNLOGQZrmbikz:
  return findThreeSrcCommutedOpIndices(MI, SrcOpIdx1, SrcOpIdx2);
case X86::VPDPWSSDYrr:
case X86::VPDPWSSDrr:
case X86::VPDPWSSDSYrr:
case X86::VPDPWSSDSrr:
case X86::VPDPWSSDZ128r:
case X86::VPDPWSSDZ128rk:
case X86::VPDPWSSDZ128rkz:
case X86::VPDPWSSDZ256r:
case X86::VPDPWSSDZ256rk:
case X86::VPDPWSSDZ256rkz:
case X86::VPDPWSSDZr:
case X86::VPDPWSSDZrk:
case X86::VPDPWSSDZrkz:
case X86::VPDPWSSDSZ128r:
case X86::VPDPWSSDSZ128rk:
case X86::VPDPWSSDSZ128rkz:
case X86::VPDPWSSDSZ256r:
case X86::VPDPWSSDSZ256rk:
case X86::VPDPWSSDSZ256rkz:
case X86::VPDPWSSDSZr:
case X86::VPDPWSSDSZrk:
case X86::VPDPWSSDSZrkz:
case X86::VPMADD52HUQZ128r:
case X86::VPMADD52HUQZ128rk:
case X86::VPMADD52HUQZ128rkz:
case X86::VPMADD52HUQZ256r:
case X86::VPMADD52HUQZ256rk:
case X86::VPMADD52HUQZ256rkz:
case X86::VPMADD52HUQZr:
case X86::VPMADD52HUQZrk:
case X86::VPMADD52HUQZrkz:
case X86::VPMADD52LUQZ128r:
case X86::VPMADD52LUQZ128rk:
case X86::VPMADD52LUQZ128rkz:
case X86::VPMADD52LUQZ256r:
case X86::VPMADD52LUQZ256rk:
case X86::VPMADD52LUQZ256rkz:
case X86::VPMADD52LUQZr:
case X86::VPMADD52LUQZrk:
case X86::VPMADD52LUQZrkz: {
  unsigned CommutableOpIdx1 = 2;
  unsigned CommutableOpIdx2 = 3;
  if (X86II::isKMasked(Desc.TSFlags)) {
    // Skip the mask register.
    ++CommutableOpIdx1;
    ++CommutableOpIdx2;
  }
  if (!fixCommutedOpIndices(SrcOpIdx1, SrcOpIdx2,
                            CommutableOpIdx1, CommutableOpIdx2))
    return false;
  if (!MI.getOperand(SrcOpIdx1).isReg() ||
      !MI.getOperand(SrcOpIdx2).isReg())
    // No idea.
    return false;
  return true;
}

default:
  const X86InstrFMA3Group *FMA3Group = getFMA3Group(MI.getOpcode(),
                                                    MI.getDesc().TSFlags);
  if (FMA3Group)
    return findThreeSrcCommutedOpIndices(MI, SrcOpIdx1, SrcOpIdx2,
                                         FMA3Group->isIntrinsic());

  // Handled masked instructions since we need to skip over the mask input
  // and the preserved input.
  if (X86II::isKMasked(Desc.TSFlags)) {
    // First assume that the first input is the mask operand and skip past it.
    unsigned CommutableOpIdx1 = Desc.getNumDefs() + 1;
    unsigned CommutableOpIdx2 = Desc.getNumDefs() + 2;
    // Check if the first input is tied. If there isn't one then we only
    // need to skip the mask operand which we did above.
    if ((MI.getDesc().getOperandConstraint(Desc.getNumDefs(),
                                           MCOI::TIED_TO) != -1)) {
      // If this is zero masking instruction with a tied operand, we need to
      // move the first index back to the first input since this must
      // be a 3 input instruction and we want the first two non-mask inputs.
      // Otherwise this is a 2 input instruction with a preserved input and
      // mask, so we need to move the indices to skip one more input.
      if (X86II::isKMergeMasked(Desc.TSFlags)) {
        ++CommutableOpIdx1;
        ++CommutableOpIdx2;
      } else {
        --CommutableOpIdx1;
      }
    }

    if (!fixCommutedOpIndices(SrcOpIdx1, SrcOpIdx2,
                              CommutableOpIdx1, CommutableOpIdx2))
      return false;

    if (!MI.getOperand(SrcOpIdx1).isReg() ||
        !MI.getOperand(SrcOpIdx2).isReg())
      // No idea.
      return false;
    return true;
  }

  return TargetInstrInfo::findCommutedOpIndices(MI, SrcOpIdx1, SrcOpIdx2);
}
return false;
2671}

2673static bool isConvertibleLEA(MachineInstr *MI) {
unsigned Opcode = MI->getOpcode();
if (Opcode != X86::LEA32r && Opcode != X86::LEA64r &&
    Opcode != X86::LEA64_32r)
  return false;

const MachineOperand &Scale = MI->getOperand(1 + X86::AddrScaleAmt);
const MachineOperand &Disp = MI->getOperand(1 + X86::AddrDisp);
const MachineOperand &Segment = MI->getOperand(1 + X86::AddrSegmentReg);

if (Segment.getReg() != 0 || !Disp.isImm() || Disp.getImm() != 0 ||
    Scale.getImm() > 1)
  return false;

return true;
2688}

2690bool X86InstrInfo::hasCommutePreference(MachineInstr &MI, bool &Commute) const {
// Currently we're interested in following sequence only.
//   r3 = lea r1, r2
//   r5 = add r3, r4
// Both r3 and r4 are killed in add, we hope the add instruction has the
// operand order
//   r5 = add r4, r3
// So later in X86FixupLEAs the lea instruction can be rewritten as add.
unsigned Opcode = MI.getOpcode();
if (Opcode != X86::ADD32rr && Opcode != X86::ADD64rr)
  return false;

const MachineRegisterInfo &MRI = MI.getParent()->getParent()->getRegInfo();
Register Reg1 = MI.getOperand(1).getReg();
Register Reg2 = MI.getOperand(2).getReg();

// Check if Reg1 comes from LEA in the same MBB.
if (MachineInstr *Inst = MRI.getUniqueVRegDef(Reg1)) {
  if (isConvertibleLEA(Inst) && Inst->getParent() == MI.getParent()) {
    Commute = true;
    return true;
  }
}

// Check if Reg2 comes from LEA in the same MBB.
if (MachineInstr *Inst = MRI.getUniqueVRegDef(Reg2)) {
  if (isConvertibleLEA(Inst) && Inst->getParent() == MI.getParent()) {
    Commute = false;
    return true;
  }
}

return false;
2723}

2725X86::CondCode X86::getCondFromBranch(const MachineInstr &MI) {
switch (MI.getOpcode()) {
default: return X86::COND_INVALID;
case X86::JCC_1:
  return static_cast<X86::CondCode>(
      MI.getOperand(MI.getDesc().getNumOperands() - 1).getImm());
}
2732}

2734/// Return condition code of a SETCC opcode.
2735X86::CondCode X86::getCondFromSETCC(const MachineInstr &MI) {
switch (MI.getOpcode()) {
default: return X86::COND_INVALID;
case X86::SETCCr: case X86::SETCCm:
  return static_cast<X86::CondCode>(
      MI.getOperand(MI.getDesc().getNumOperands() - 1).getImm());
}
2742}

2744/// Return condition code of a CMov opcode.
2745X86::CondCode X86::getCondFromCMov(const MachineInstr &MI) {
switch (MI.getOpcode()) {
default: return X86::COND_INVALID;
case X86::CMOV16rr: case X86::CMOV32rr: case X86::CMOV64rr:
case X86::CMOV16rm: case X86::CMOV32rm: case X86::CMOV64rm:
  return static_cast<X86::CondCode>(
      MI.getOperand(MI.getDesc().getNumOperands() - 1).getImm());
}
2753}

2755/// Return the inverse of the specified condition,
2756/// e.g. turning COND_E to COND_NE.
2757X86::CondCode X86::GetOppositeBranchCondition(X86::CondCode CC) {
switch (CC) {
default: llvm_unreachable("Illegal condition code!")__builtin_unreachable();
case X86::COND_E:  return X86::COND_NE;
case X86::COND_NE: return X86::COND_E;
case X86::COND_L:  return X86::COND_GE;
case X86::COND_LE: return X86::COND_G;
case X86::COND_G:  return X86::COND_LE;
case X86::COND_GE: return X86::COND_L;
case X86::COND_B:  return X86::COND_AE;
case X86::COND_BE: return X86::COND_A;
case X86::COND_A:  return X86::COND_BE;
case X86::COND_AE: return X86::COND_B;
case X86::COND_S:  return X86::COND_NS;
case X86::COND_NS: return X86::COND_S;
case X86::COND_P:  return X86::COND_NP;
case X86::COND_NP: return X86::COND_P;
case X86::COND_O:  return X86::COND_NO;
case X86::COND_NO: return X86::COND_O;
case X86::COND_NE_OR_P:  return X86::COND_E_AND_NP;
case X86::COND_E_AND_NP: return X86::COND_NE_OR_P;
}
2779}

2781/// Assuming the flags are set by MI(a,b), return the condition code if we
2782/// modify the instructions such that flags are set by MI(b,a).
2783static X86::CondCode getSwappedCondition(X86::CondCode CC) {
switch (CC) {
default: return X86::COND_INVALID;
case X86::COND_E:  return X86::COND_E;
case X86::COND_NE: return X86::COND_NE;
case X86::COND_L:  return X86::COND_G;
case X86::COND_LE: return X86::COND_GE;
case X86::COND_G:  return X86::COND_L;
case X86::COND_GE: return X86::COND_LE;
case X86::COND_B:  return X86::COND_A;
case X86::COND_BE: return X86::COND_AE;
case X86::COND_A:  return X86::COND_B;
case X86::COND_AE: return X86::COND_BE;
}
2797}

2799std::pair<X86::CondCode, bool>
2800X86::getX86ConditionCode(CmpInst::Predicate Predicate) {
X86::CondCode CC = X86::COND_INVALID;
bool NeedSwap = false;
switch (Predicate) {
default: break;
// Floating-point Predicates
case CmpInst::FCMP_UEQ: CC = X86::COND_E;       break;
case CmpInst::FCMP_OLT: NeedSwap = true;        LLVM_FALLTHROUGH[[gnu::fallthrough]];
case CmpInst::FCMP_OGT: CC = X86::COND_A;       break;
case CmpInst::FCMP_OLE: NeedSwap = true;        LLVM_FALLTHROUGH[[gnu::fallthrough]];
case CmpInst::FCMP_OGE: CC = X86::COND_AE;      break;
case CmpInst::FCMP_UGT: NeedSwap = true;        LLVM_FALLTHROUGH[[gnu::fallthrough]];
case CmpInst::FCMP_ULT: CC = X86::COND_B;       break;
case CmpInst::FCMP_UGE: NeedSwap = true;        LLVM_FALLTHROUGH[[gnu::fallthrough]];
case CmpInst::FCMP_ULE: CC = X86::COND_BE;      break;
case CmpInst::FCMP_ONE: CC = X86::COND_NE;      break;
case CmpInst::FCMP_UNO: CC = X86::COND_P;       break;
case CmpInst::FCMP_ORD: CC = X86::COND_NP;      break;
case CmpInst::FCMP_OEQ:                         LLVM_FALLTHROUGH[[gnu::fallthrough]];
case CmpInst::FCMP_UNE: CC = X86::COND_INVALID; break;

// Integer Predicates
case CmpInst::ICMP_EQ:  CC = X86::COND_E;       break;
case CmpInst::ICMP_NE:  CC = X86::COND_NE;      break;
case CmpInst::ICMP_UGT: CC = X86::COND_A;       break;
case CmpInst::ICMP_UGE: CC = X86::COND_AE;      break;
case CmpInst::ICMP_ULT: CC = X86::COND_B;       break;
case CmpInst::ICMP_ULE: CC = X86::COND_BE;      break;
case CmpInst::ICMP_SGT: CC = X86::COND_G;       break;
case CmpInst::ICMP_SGE: CC = X86::COND_GE;      break;
case CmpInst::ICMP_SLT: CC = X86::COND_L;       break;
case CmpInst::ICMP_SLE: CC = X86::COND_LE;      break;
}

return std::make_pair(CC, NeedSwap);
2835}

2837/// Return a setcc opcode based on whether it has memory operand.
2838unsigned X86::getSETOpc(bool HasMemoryOperand) {
return HasMemoryOperand ? X86::SETCCr : X86::SETCCm;
2840}

2842/// Return a cmov opcode for the given register size in bytes, and operand type.
2843unsigned X86::getCMovOpcode(unsigned RegBytes, bool HasMemoryOperand) {
switch(RegBytes) {
default: llvm_unreachable("Illegal register size!")__builtin_unreachable();
case 2: return HasMemoryOperand ? X86::CMOV16rm : X86::CMOV16rr;
case 4: return HasMemoryOperand ? X86::CMOV32rm : X86::CMOV32rr;
case 8: return HasMemoryOperand ? X86::CMOV64rm : X86::CMOV64rr;
}
2850}

2852/// Get the VPCMP immediate for the given condition.
2853unsigned X86::getVPCMPImmForCond(ISD::CondCode CC) {
switch (CC) {
default: llvm_unreachable("Unexpected SETCC condition")__builtin_unreachable();
case ISD::SETNE:  return 4;
case ISD::SETEQ:  return 0;
case ISD::SETULT:
case ISD::SETLT: return 1;
case ISD::SETUGT:
case ISD::SETGT: return 6;
case ISD::SETUGE:
case ISD::SETGE: return 5;
case ISD::SETULE:
case ISD::SETLE: return 2;
}
2867}

2869/// Get the VPCMP immediate if the operands are swapped.
2870unsigned X86::getSwappedVPCMPImm(unsigned Imm) {
switch (Imm) {
default: llvm_unreachable("Unreachable!")__builtin_unreachable();
case 0x01: Imm = 0x06; break; // LT  -> NLE
case 0x02: Imm = 0x05; break; // LE  -> NLT
case 0x05: Imm = 0x02; break; // NLT -> LE
case 0x06: Imm = 0x01; break; // NLE -> LT
case 0x00: // EQ
case 0x03: // FALSE
case 0x04: // NE
case 0x07: // TRUE
  break;
}

return Imm;
2885}

2887/// Get the VPCOM immediate if the operands are swapped.
2888unsigned X86::getSwappedVPCOMImm(unsigned Imm) {
switch (Imm) {
default: llvm_unreachable("Unreachable!")__builtin_unreachable();
case 0x00: Imm = 0x02; break; // LT -> GT
case 0x01: Imm = 0x03; break; // LE -> GE
case 0x02: Imm = 0x00; break; // GT -> LT
case 0x03: Imm = 0x01; break; // GE -> LE
case 0x04: // EQ
case 0x05: // NE
case 0x06: // FALSE
case 0x07: // TRUE
  break;
}

return Imm;
2903}

2905/// Get the VCMP immediate if the operands are swapped.
2906unsigned X86::getSwappedVCMPImm(unsigned Imm) {
// Only need the lower 2 bits to distinquish.
switch (Imm & 0x3) {
default: llvm_unreachable("Unreachable!")__builtin_unreachable();
case 0x00: case 0x03:
  // EQ/NE/TRUE/FALSE/ORD/UNORD don't change immediate when commuted.
  break;
case 0x01: case 0x02:
  // Need to toggle bits 3:0. Bit 4 stays the same.
  Imm ^= 0xf;
  break;
}

return Imm;
2920}

2922bool X86InstrInfo::isUnconditionalTailCall(const MachineInstr &MI) const {
switch (MI.getOpcode()) {
case X86::TCRETURNdi:
case X86::TCRETURNri:
case X86::TCRETURNmi:
case X86::TCRETURNdi64:
case X86::TCRETURNri64:
case X86::TCRETURNmi64:
  return true;
default:
  return false;
}
2934}

2936bool X86InstrInfo::canMakeTailCallConditional(
  SmallVectorImpl<MachineOperand> &BranchCond,
  const MachineInstr &TailCall) const {
if (TailCall.getOpcode() != X86::TCRETURNdi &&
    TailCall.getOpcode() != X86::TCRETURNdi64) {
  // Only direct calls can be done with a conditional branch.
  return false;
}

const MachineFunction *MF = TailCall.getParent()->getParent();
if (Subtarget.isTargetWin64() && MF->hasWinCFI()) {
  // Conditional tail calls confuse the Win64 unwinder.
  return false;
}

assert(BranchCond.size() == 1)((void)0);
if (BranchCond[0].getImm() > X86::LAST_VALID_COND) {
  // Can't make a conditional tail call with this condition.
  return false;
}

const X86MachineFunctionInfo *X86FI = MF->getInfo<X86MachineFunctionInfo>();
if (X86FI->getTCReturnAddrDelta() != 0 ||
    TailCall.getOperand(1).getImm() != 0) {
  // A conditional tail call cannot do any stack adjustment.
  return false;
}

return true;
2965}

2967void X86InstrInfo::replaceBranchWithTailCall(
  MachineBasicBlock &MBB, SmallVectorImpl<MachineOperand> &BranchCond,
  const MachineInstr &TailCall) const {
assert(canMakeTailCallConditional(BranchCond, TailCall))((void)0);

MachineBasicBlock::iterator I = MBB.end();
while (I != MBB.begin()) {
  --I;
  if (I->isDebugInstr())
    continue;
  if (!I->isBranch())
    assert(0 && "Can't find the branch to replace!")((void)0);

  X86::CondCode CC = X86::getCondFromBranch(*I);
  assert(BranchCond.size() == 1)((void)0);
  if (CC != BranchCond[0].getImm())
    continue;

  break;
}

unsigned Opc = TailCall.getOpcode() == X86::TCRETURNdi ? X86::TCRETURNdicc
                                                       : X86::TCRETURNdi64cc;

auto MIB = BuildMI(MBB, I, MBB.findDebugLoc(I), get(Opc));
MIB->addOperand(TailCall.getOperand(0)); // Destination.
MIB.addImm(0); // Stack offset (not used).
MIB->addOperand(BranchCond[0]); // Condition.
MIB.copyImplicitOps(TailCall); // Regmask and (imp-used) parameters.

// Add implicit uses and defs of all live regs potentially clobbered by the
// call. This way they still appear live across the call.
LivePhysRegs LiveRegs(getRegisterInfo());
LiveRegs.addLiveOuts(MBB);
SmallVector<std::pair<MCPhysReg, const MachineOperand *>, 8> Clobbers;
LiveRegs.stepForward(*MIB, Clobbers);
for (const auto &C : Clobbers) {
  MIB.addReg(C.first, RegState::Implicit);
  MIB.addReg(C.first, RegState::Implicit | RegState::Define);
}

I->eraseFromParent();
3009}

3011// Given a MBB and its TBB, find the FBB which was a fallthrough MBB (it may
3012// not be a fallthrough MBB now due to layout changes). Return nullptr if the
3013// fallthrough MBB cannot be identified.
3014static MachineBasicBlock *getFallThroughMBB(MachineBasicBlock *MBB,
                                          MachineBasicBlock *TBB) {
// Look for non-EHPad successors other than TBB. If we find exactly one, it
// is the fallthrough MBB. If we find zero, then TBB is both the target MBB
// and fallthrough MBB. If we find more than one, we cannot identify the
// fallthrough MBB and should return nullptr.
MachineBasicBlock *FallthroughBB = nullptr;
for (auto SI = MBB->succ_begin(), SE = MBB->succ_end(); SI != SE; ++SI) {
  if ((*SI)->isEHPad() || (*SI == TBB && FallthroughBB))
    continue;
  // Return a nullptr if we found more than one fallthrough successor.
  if (FallthroughBB && FallthroughBB != TBB)
    return nullptr;
  FallthroughBB = *SI;
}
return FallthroughBB;
3030}

3032bool X86InstrInfo::AnalyzeBranchImpl(
  MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB,
  SmallVectorImpl<MachineOperand> &Cond,
  SmallVectorImpl<MachineInstr *> &CondBranches, bool AllowModify) const {

// Start from the bottom of the block and work up, examining the
// terminator instructions.
MachineBasicBlock::iterator I = MBB.end();
MachineBasicBlock::iterator UnCondBrIter = MBB.end();
while (I != MBB.begin()) {
  --I;
  if (I->isDebugInstr())
    continue;

  // Working from the bottom, when we see a non-terminator instruction, we're
  // done.
  if (!isUnpredicatedTerminator(*I))
    break;

  // A terminator that isn't a branch can't easily be handled by this
  // analysis.
  if (!I->isBranch())
    return true;

  // Handle unconditional branches.
  if (I->getOpcode() == X86::JMP_1) {
    UnCondBrIter = I;

    if (!AllowModify) {
      TBB = I->getOperand(0).getMBB();
      continue;
    }

    // If the block has any instructions after a JMP, delete them.
    while (std::next(I) != MBB.end())
      std::next(I)->eraseFromParent();

    Cond.clear();
    FBB = nullptr;

    // Delete the JMP if it's equivalent to a fall-through.
    if (MBB.isLayoutSuccessor(I->getOperand(0).getMBB())) {
      TBB = nullptr;
      I->eraseFromParent();
      I = MBB.end();
      UnCondBrIter = MBB.end();
      continue;
    }

    // TBB is used to indicate the unconditional destination.
    TBB = I->getOperand(0).getMBB();
    continue;
  }

  // Handle conditional branches.
  X86::CondCode BranchCode = X86::getCondFromBranch(*I);
  if (BranchCode == X86::COND_INVALID)
    return true;  // Can't handle indirect branch.

  // In practice we should never have an undef eflags operand, if we do
  // abort here as we are not prepared to preserve the flag.
  if (I->findRegisterUseOperand(X86::EFLAGS)->isUndef())
    return true;

  // Working from the bottom, handle the first conditional branch.
  if (Cond.empty()) {
    MachineBasicBlock *TargetBB = I->getOperand(0).getMBB();
    if (AllowModify && UnCondBrIter != MBB.end() &&
        MBB.isLayoutSuccessor(TargetBB)) {
      // If we can modify the code and it ends in something like:
      //
      //     jCC L1
      //     jmp L2
      //   L1:
      //     ...
      //   L2:
      //
      // Then we can change this to:
      //
      //     jnCC L2
      //   L1:
      //     ...
      //   L2:
      //
      // Which is a bit more efficient.
      // We conditionally jump to the fall-through block.
      BranchCode = GetOppositeBranchCondition(BranchCode);
      MachineBasicBlock::iterator OldInst = I;

      BuildMI(MBB, UnCondBrIter, MBB.findDebugLoc(I), get(X86::JCC_1))
        .addMBB(UnCondBrIter->getOperand(0).getMBB())
        .addImm(BranchCode);
      BuildMI(MBB, UnCondBrIter, MBB.findDebugLoc(I), get(X86::JMP_1))
        .addMBB(TargetBB);

      OldInst->eraseFromParent();
      UnCondBrIter->eraseFromParent();

      // Restart the analysis.
      UnCondBrIter = MBB.end();
      I = MBB.end();
      continue;
    }

    FBB = TBB;
    TBB = I->getOperand(0).getMBB();
    Cond.push_back(MachineOperand::CreateImm(BranchCode));
    CondBranches.push_back(&*I);
    continue;
  }

  // Handle subsequent conditional branches. Only handle the case where all
  // conditional branches branch to the same destination and their condition
  // opcodes fit one of the special multi-branch idioms.
  assert(Cond.size() == 1)((void)0);
  assert(TBB)((void)0);

  // If the conditions are the same, we can leave them alone.
  X86::CondCode OldBranchCode = (X86::CondCode)Cond[0].getImm();
  auto NewTBB = I->getOperand(0).getMBB();
  if (OldBranchCode == BranchCode && TBB == NewTBB)
    continue;

  // If they differ, see if they fit one of the known patterns. Theoretically,
  // we could handle more patterns here, but we shouldn't expect to see them
  // if instruction selection has done a reasonable job.
  if (TBB == NewTBB &&
             ((OldBranchCode == X86::COND_P && BranchCode == X86::COND_NE) ||
              (OldBranchCode == X86::COND_NE && BranchCode == X86::COND_P))) {
    BranchCode = X86::COND_NE_OR_P;
  } else if ((OldBranchCode == X86::COND_NP && BranchCode == X86::COND_NE) ||
             (OldBranchCode == X86::COND_E && BranchCode == X86::COND_P)) {
    if (NewTBB != (FBB ? FBB : getFallThroughMBB(&MBB, TBB)))
      return true;

    // X86::COND_E_AND_NP usually has two different branch destinations.
    //
    // JP B1
    // JE B2
    // JMP B1
    // B1:
    // B2:
    //
    // Here this condition branches to B2 only if NP && E. It has another
    // equivalent form:
    //
    // JNE B1
    // JNP B2
    // JMP B1
    // B1:
    // B2:
    //
    // Similarly it branches to B2 only if E && NP. That is why this condition
    // is named with COND_E_AND_NP.
    BranchCode = X86::COND_E_AND_NP;
  } else
    return true;

  // Update the MachineOperand.
  Cond[0].setImm(BranchCode);
  CondBranches.push_back(&*I);
}

return false;
3196}

3198bool X86InstrInfo::analyzeBranch(MachineBasicBlock &MBB,
                               MachineBasicBlock *&TBB,
                               MachineBasicBlock *&FBB,
                               SmallVectorImpl<MachineOperand> &Cond,
                               bool AllowModify) const {
SmallVector<MachineInstr *, 4> CondBranches;
return AnalyzeBranchImpl(MBB, TBB, FBB, Cond, CondBranches, AllowModify);
3205}

3207bool X86InstrInfo::analyzeBranchPredicate(MachineBasicBlock &MBB,
                                        MachineBranchPredicate &MBP,
                                        bool AllowModify) const {
using namespace std::placeholders;

SmallVector<MachineOperand, 4> Cond;
SmallVector<MachineInstr *, 4> CondBranches;
if (AnalyzeBranchImpl(MBB, MBP.TrueDest, MBP.FalseDest, Cond, CondBranches,
                      AllowModify))
  return true;

if (Cond.size() != 1)
  return true;

assert(MBP.TrueDest && "expected!")((void)0);

if (!MBP.FalseDest)
  MBP.FalseDest = MBB.getNextNode();

const TargetRegisterInfo *TRI = &getRegisterInfo();

MachineInstr *ConditionDef = nullptr;
bool SingleUseCondition = true;

for (auto I = std::next(MBB.rbegin()), E = MBB.rend(); I != E; ++I) {
  if (I->modifiesRegister(X86::EFLAGS, TRI)) {
    ConditionDef = &*I;
    break;
  }

  if (I->readsRegister(X86::EFLAGS, TRI))
    SingleUseCondition = false;
}

if (!ConditionDef)
  return true;

if (SingleUseCondition) {
  for (auto *Succ : MBB.successors())
    if (Succ->isLiveIn(X86::EFLAGS))
      SingleUseCondition = false;
}

MBP.ConditionDef = ConditionDef;
MBP.SingleUseCondition = SingleUseCondition;

// Currently we only recognize the simple pattern:
//
//   test %reg, %reg
//   je %label
//
const unsigned TestOpcode =
    Subtarget.is64Bit() ? X86::TEST64rr : X86::TEST32rr;

if (ConditionDef->getOpcode() == TestOpcode &&
    ConditionDef->getNumOperands() == 3 &&
    ConditionDef->getOperand(0).isIdenticalTo(ConditionDef->getOperand(1)) &&
    (Cond[0].getImm() == X86::COND_NE || Cond[0].getImm() == X86::COND_E)) {
  MBP.LHS = ConditionDef->getOperand(0);
  MBP.RHS = MachineOperand::CreateImm(0);
  MBP.Predicate = Cond[0].getImm() == X86::COND_NE
                      ? MachineBranchPredicate::PRED_NE
                      : MachineBranchPredicate::PRED_EQ;
  return false;
}

return true;
3274}

3276unsigned X86InstrInfo::removeBranch(MachineBasicBlock &MBB,
                                  int *BytesRemoved) const {
assert(!BytesRemoved && "code size not handled")((void)0);

MachineBasicBlock::iterator I = MBB.end();
unsigned Count = 0;

while (I != MBB.begin()) {
  --I;
  if (I->isDebugInstr())
    continue;
  if (I->getOpcode() != X86::JMP_1 &&
      X86::getCondFromBranch(*I) == X86::COND_INVALID)
    break;
  // Remove the branch.
  I->eraseFromParent();
  I = MBB.end();
  ++Count;
}

return Count;
3297}

3299unsigned X86InstrInfo::insertBranch(MachineBasicBlock &MBB,
                                  MachineBasicBlock *TBB,
                                  MachineBasicBlock *FBB,
                                  ArrayRef<MachineOperand> Cond,
                                  const DebugLoc &DL,
                                  int *BytesAdded) const {
// Shouldn't be a fall through.
assert(TBB && "insertBranch must not be told to insert a fallthrough")((void)0);
assert((Cond.size() == 1 || Cond.size() == 0) &&((void)0)
       "X86 branch conditions have one component!")((void)0);
assert(!BytesAdded && "code size not handled")((void)0);

if (Cond.empty()) {
  // Unconditional branch?
  assert(!FBB && "Unconditional branch with multiple successors!")((void)0);
  BuildMI(&MBB, DL, get(X86::JMP_1)).addMBB(TBB);
  return 1;
}

// If FBB is null, it is implied to be a fall-through block.
bool FallThru = FBB == nullptr;

// Conditional branch.
unsigned Count = 0;
X86::CondCode CC = (X86::CondCode)Cond[0].getImm();
switch (CC) {
case X86::COND_NE_OR_P:
  // Synthesize NE_OR_P with two branches.
  BuildMI(&MBB, DL, get(X86::JCC_1)).addMBB(TBB).addImm(X86::COND_NE);
  ++Count;
  BuildMI(&MBB, DL, get(X86::JCC_1)).addMBB(TBB).addImm(X86::COND_P);
  ++Count;
  break;
case X86::COND_E_AND_NP:
  // Use the next block of MBB as FBB if it is null.
  if (FBB == nullptr) {
    FBB = getFallThroughMBB(&MBB, TBB);
    assert(FBB && "MBB cannot be the last block in function when the false "((void)0)
                  "body is a fall-through.")((void)0);
  }
  // Synthesize COND_E_AND_NP with two branches.
  BuildMI(&MBB, DL, get(X86::JCC_1)).addMBB(FBB).addImm(X86::COND_NE);
  ++Count;
  BuildMI(&MBB, DL, get(X86::JCC_1)).addMBB(TBB).addImm(X86::COND_NP);
  ++Count;
  break;
default: {
  BuildMI(&MBB, DL, get(X86::JCC_1)).addMBB(TBB).addImm(CC);
  ++Count;
}
}
if (!FallThru) {
  // Two-way Conditional branch. Insert the second branch.
  BuildMI(&MBB, DL, get(X86::JMP_1)).addMBB(FBB);
  ++Count;
}
return Count;
3356}

3358bool X86InstrInfo::canInsertSelect(const MachineBasicBlock &MBB,
                                 ArrayRef<MachineOperand> Cond,
                                 Register DstReg, Register TrueReg,
                                 Register FalseReg, int &CondCycles,
                                 int &TrueCycles, int &FalseCycles) const {
// Not all subtargets have cmov instructions.
if (!Subtarget.hasCMov())
  return false;
if (Cond.size() != 1)
  return false;
// We cannot do the composite conditions, at least not in SSA form.
if ((X86::CondCode)Cond[0].getImm() > X86::LAST_VALID_COND)
  return false;

// Check register classes.
const MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
const TargetRegisterClass *RC =
  RI.getCommonSubClass(MRI.getRegClass(TrueReg), MRI.getRegClass(FalseReg));
if (!RC)
  return false;

// We have cmov instructions for 16, 32, and 64 bit general purpose registers.
if (X86::GR16RegClass.hasSubClassEq(RC) ||
    X86::GR32RegClass.hasSubClassEq(RC) ||
    X86::GR64RegClass.hasSubClassEq(RC)) {
  // This latency applies to Pentium M, Merom, Wolfdale, Nehalem, and Sandy
  // Bridge. Probably Ivy Bridge as well.
  CondCycles = 2;
  TrueCycles = 2;
  FalseCycles = 2;
  return true;
}

// Can't do vectors.
return false;
3393}

3395void X86InstrInfo::insertSelect(MachineBasicBlock &MBB,
                              MachineBasicBlock::iterator I,
                              const DebugLoc &DL, Register DstReg,
                              ArrayRef<MachineOperand> Cond, Register TrueReg,
                              Register FalseReg) const {
MachineRegisterInfo &MRI = MBB.getParent()->getRegInfo();
const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();
const TargetRegisterClass &RC = *MRI.getRegClass(DstReg);
assert(Cond.size() == 1 && "Invalid Cond array")((void)0);
unsigned Opc = X86::getCMovOpcode(TRI.getRegSizeInBits(RC) / 8,
                                  false /*HasMemoryOperand*/);
BuildMI(MBB, I, DL, get(Opc), DstReg)
    .addReg(FalseReg)
    .addReg(TrueReg)
    .addImm(Cond[0].getImm());
3410}

3412/// Test if the given register is a physical h register.
3413static bool isHReg(unsigned Reg) {
return X86::GR8_ABCD_HRegClass.contains(Reg);
3415}

3417// Try and copy between VR128/VR64 and GR64 registers.
3418static unsigned CopyToFromAsymmetricReg(unsigned DestReg, unsigned SrcReg,
                                      const X86Subtarget &Subtarget) {
bool HasAVX = Subtarget.hasAVX();
bool HasAVX512 = Subtarget.hasAVX512();

// SrcReg(MaskReg) -> DestReg(GR64)
// SrcReg(MaskReg) -> DestReg(GR32)

// All KMASK RegClasses hold the same k registers, can be tested against anyone.
if (X86::VK16RegClass.contains(SrcReg)) {
  if (X86::GR64RegClass.contains(DestReg)) {
    assert(Subtarget.hasBWI())((void)0);
    return X86::KMOVQrk;
  }
  if (X86::GR32RegClass.contains(DestReg))
    return Subtarget.hasBWI() ? X86::KMOVDrk : X86::KMOVWrk;
}

// SrcReg(GR64) -> DestReg(MaskReg)
// SrcReg(GR32) -> DestReg(MaskReg)

// All KMASK RegClasses hold the same k registers, can be tested against anyone.
if (X86::VK16RegClass.contains(DestReg)) {
  if (X86::GR64RegClass.contains(SrcReg)) {
    assert(Subtarget.hasBWI())((void)0);
    return X86::KMOVQkr;
  }
  if (X86::GR32RegClass.contains(SrcReg))
    return Subtarget.hasBWI() ? X86::KMOVDkr : X86::KMOVWkr;
}


// SrcReg(VR128) -> DestReg(GR64)
// SrcReg(VR64)  -> DestReg(GR64)
// SrcReg(GR64)  -> DestReg(VR128)
// SrcReg(GR64)  -> DestReg(VR64)

if (X86::GR64RegClass.contains(DestReg)) {
  if (X86::VR128XRegClass.contains(SrcReg))
    // Copy from a VR128 register to a GR64 register.
    return HasAVX512 ? X86::VMOVPQIto64Zrr :
           HasAVX    ? X86::VMOVPQIto64rr  :
                       X86::MOVPQIto64rr;
  if (X86::VR64RegClass.contains(SrcReg))
    // Copy from a VR64 register to a GR64 register.
    return X86::MMX_MOVD64from64rr;
} else if (X86::GR64RegClass.contains(SrcReg)) {
  // Copy from a GR64 register to a VR128 register.
  if (X86::VR128XRegClass.contains(DestReg))
    return HasAVX512 ? X86::VMOV64toPQIZrr :
           HasAVX    ? X86::VMOV64toPQIrr  :
                       X86::MOV64toPQIrr;
  // Copy from a GR64 register to a VR64 register.
  if (X86::VR64RegClass.contains(DestReg))
    return X86::MMX_MOVD64to64rr;
}

// SrcReg(VR128) -> DestReg(GR32)
// SrcReg(GR32)  -> DestReg(VR128)

if (X86::GR32RegClass.contains(DestReg) &&
    X86::VR128XRegClass.contains(SrcReg))
  // Copy from a VR128 register to a GR32 register.
  return HasAVX512 ? X86::VMOVPDI2DIZrr :
         HasAVX    ? X86::VMOVPDI2DIrr  :
                     X86::MOVPDI2DIrr;

if (X86::VR128XRegClass.contains(DestReg) &&
    X86::GR32RegClass.contains(SrcReg))
  // Copy from a VR128 register to a VR128 register.
  return HasAVX512 ? X86::VMOVDI2PDIZrr :
         HasAVX    ? X86::VMOVDI2PDIrr  :
                     X86::MOVDI2PDIrr;
return 0;
3492}

3494void X86InstrInfo::copyPhysReg(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI,
                             const DebugLoc &DL, MCRegister DestReg,
                             MCRegister SrcReg, bool KillSrc) const {
// First deal with the normal symmetric copies.
bool HasAVX = Subtarget.hasAVX();
bool HasVLX = Subtarget.hasVLX();
unsigned Opc = 0;
if (X86::GR64RegClass.contains(DestReg, SrcReg))
  Opc = X86::MOV64rr;
else if (X86::GR32RegClass.contains(DestReg, SrcReg))
  Opc = X86::MOV32rr;
else if (X86::GR16RegClass.contains(DestReg, SrcReg))
  Opc = X86::MOV16rr;
else if (X86::GR8RegClass.contains(DestReg, SrcReg)) {
  // Copying to or from a physical H register on x86-64 requires a NOREX
  // move.  Otherwise use a normal move.
  if ((isHReg(DestReg) || isHReg(SrcReg)) &&
      Subtarget.is64Bit()) {
    Opc = X86::MOV8rr_NOREX;
    // Both operands must be encodable without an REX prefix.
    assert(X86::GR8_NOREXRegClass.contains(SrcReg, DestReg) &&((void)0)
           "8-bit H register can not be copied outside GR8_NOREX")((void)0);
  } else
    Opc = X86::MOV8rr;
}
else if (X86::VR64RegClass.contains(DestReg, SrcReg))
  Opc = X86::MMX_MOVQ64rr;
else if (X86::VR128XRegClass.contains(DestReg, SrcReg)) {
  if (HasVLX)
    Opc = X86::VMOVAPSZ128rr;
  else if (X86::VR128RegClass.contains(DestReg, SrcReg))
    Opc = HasAVX ? X86::VMOVAPSrr : X86::MOVAPSrr;
  else {
    // If this an extended register and we don't have VLX we need to use a
    // 512-bit move.
    Opc = X86::VMOVAPSZrr;
    const TargetRegisterInfo *TRI = &getRegisterInfo();
    DestReg = TRI->getMatchingSuperReg(DestReg, X86::sub_xmm,
                                       &X86::VR512RegClass);
    SrcReg = TRI->getMatchingSuperReg(SrcReg, X86::sub_xmm,
                                      &X86::VR512RegClass);
  }
} else if (X86::VR256XRegClass.contains(DestReg, SrcReg)) {
  if (HasVLX)
    Opc = X86::VMOVAPSZ256rr;
  else if (X86::VR256RegClass.contains(DestReg, SrcReg))
    Opc = X86::VMOVAPSYrr;
  else {
    // If this an extended register and we don't have VLX we need to use a
    // 512-bit move.
    Opc = X86::VMOVAPSZrr;
    const TargetRegisterInfo *TRI = &getRegisterInfo();
    DestReg = TRI->getMatchingSuperReg(DestReg, X86::sub_ymm,
                                       &X86::VR512RegClass);
    SrcReg = TRI->getMatchingSuperReg(SrcReg, X86::sub_ymm,
                                      &X86::VR512RegClass);
  }
} else if (X86::VR512RegClass.contains(DestReg, SrcReg))
  Opc = X86::VMOVAPSZrr;
// All KMASK RegClasses hold the same k registers, can be tested against anyone.
else if (X86::VK16RegClass.contains(DestReg, SrcReg))
  Opc = Subtarget.hasBWI() ? X86::KMOVQkk : X86::KMOVWkk;
if (!Opc)
  Opc = CopyToFromAsymmetricReg(DestReg, SrcReg, Subtarget);

if (Opc) {
  BuildMI(MBB, MI, DL, get(Opc), DestReg)
    .addReg(SrcReg, getKillRegState(KillSrc));
  return;
}

if (SrcReg == X86::EFLAGS || DestReg == X86::EFLAGS) {
  // FIXME: We use a fatal error here because historically LLVM has tried
  // lower some of these physreg copies and we want to ensure we get
  // reasonable bug reports if someone encounters a case no other testing
  // found. This path should be removed after the LLVM 7 release.
  report_fatal_error("Unable to copy EFLAGS physical register!");
}

LLVM_DEBUG(dbgs() << "Cannot copy " << RI.getName(SrcReg) << " to "do { } while (false)
                  << RI.getName(DestReg) << '\n')do { } while (false);
report_fatal_error("Cannot emit physreg copy instruction");
3577}

3579Optional<DestSourcePair>
3580X86InstrInfo::isCopyInstrImpl(const MachineInstr &MI) const {
if (MI.isMoveReg())
  return DestSourcePair{MI.getOperand(0), MI.getOperand(1)};
return None;
3584}

3586static unsigned getLoadStoreRegOpcode(Register Reg,
                                    const TargetRegisterClass *RC,
                                    bool IsStackAligned,
                                    const X86Subtarget &STI, bool load) {
bool HasAVX = STI.hasAVX();
bool HasAVX512 = STI.hasAVX512();
bool HasVLX = STI.hasVLX();

switch (STI.getRegisterInfo()->getSpillSize(*RC)) {
default:
  llvm_unreachable("Unknown spill size")__builtin_unreachable();
case 1:
  assert(X86::GR8RegClass.hasSubClassEq(RC) && "Unknown 1-byte regclass")((void)0);
  if (STI.is64Bit())
    // Copying to or from a physical H register on x86-64 requires a NOREX
    // move.  Otherwise use a normal move.
    if (isHReg(Reg) || X86::GR8_ABCD_HRegClass.hasSubClassEq(RC))
      return load ? X86::MOV8rm_NOREX : X86::MOV8mr_NOREX;
  return load ? X86::MOV8rm : X86::MOV8mr;
case 2:
  if (X86::VK16RegClass.hasSubClassEq(RC))
    return load ? X86::KMOVWkm : X86::KMOVWmk;
  assert(X86::GR16RegClass.hasSubClassEq(RC) && "Unknown 2-byte regclass")((void)0);
  return load ? X86::MOV16rm : X86::MOV16mr;
case 4:
  if (X86::GR32RegClass.hasSubClassEq(RC))
    return load ? X86::MOV32rm : X86::MOV32mr;
  if (X86::FR32XRegClass.hasSubClassEq(RC))
    return load ?
      (HasAVX512 ? X86::VMOVSSZrm_alt :
       HasAVX    ? X86::VMOVSSrm_alt :
                   X86::MOVSSrm_alt) :
      (HasAVX512 ? X86::VMOVSSZmr :
       HasAVX    ? X86::VMOVSSmr :
                   X86::MOVSSmr);
  if (X86::RFP32RegClass.hasSubClassEq(RC))
    return load ? X86::LD_Fp32m : X86::ST_Fp32m;
  if (X86::VK32RegClass.hasSubClassEq(RC)) {
    assert(STI.hasBWI() && "KMOVD requires BWI")((void)0);
    return load ? X86::KMOVDkm : X86::KMOVDmk;
  }
  // All of these mask pair classes have the same spill size, the same kind
  // of kmov instructions can be used with all of them.
  if (X86::VK1PAIRRegClass.hasSubClassEq(RC) ||
      X86::VK2PAIRRegClass.hasSubClassEq(RC) ||
      X86::VK4PAIRRegClass.hasSubClassEq(RC) ||
      X86::VK8PAIRRegClass.hasSubClassEq(RC) ||
      X86::VK16PAIRRegClass.hasSubClassEq(RC))
    return load ? X86::MASKPAIR16LOAD : X86::MASKPAIR16STORE;
  llvm_unreachable("Unknown 4-byte regclass")__builtin_unreachable();
case 8:
  if (X86::GR64RegClass.hasSubClassEq(RC))
    return load ? X86::MOV64rm : X86::MOV64mr;
  if (X86::FR64XRegClass.hasSubClassEq(RC))
    return load ?
      (HasAVX512 ? X86::VMOVSDZrm_alt :
       HasAVX    ? X86::VMOVSDrm_alt :
                   X86::MOVSDrm_alt) :
      (HasAVX512 ? X86::VMOVSDZmr :
       HasAVX    ? X86::VMOVSDmr :
                   X86::MOVSDmr);
  if (X86::VR64RegClass.hasSubClassEq(RC))
    return load ? X86::MMX_MOVQ64rm : X86::MMX_MOVQ64mr;
  if (X86::RFP64RegClass.hasSubClassEq(RC))
    return load ? X86::LD_Fp64m : X86::ST_Fp64m;
  if (X86::VK64RegClass.hasSubClassEq(RC)) {
    assert(STI.hasBWI() && "KMOVQ requires BWI")((void)0);
    return load ? X86::KMOVQkm : X86::KMOVQmk;
  }
  llvm_unreachable("Unknown 8-byte regclass")__builtin_unreachable();
case 10:
  assert(X86::RFP80RegClass.hasSubClassEq(RC) && "Unknown 10-byte regclass")((void)0);
  return load ? X86::LD_Fp80m : X86::ST_FpP80m;
case 16: {
  if (X86::VR128XRegClass.hasSubClassEq(RC)) {
    // If stack is realigned we can use aligned stores.
    if (IsStackAligned)
      return load ?
        (HasVLX    ? X86::VMOVAPSZ128rm :
         HasAVX512 ? X86::VMOVAPSZ128rm_NOVLX :
         HasAVX    ? X86::VMOVAPSrm :
                     X86::MOVAPSrm):
        (HasVLX    ? X86::VMOVAPSZ128mr :
         HasAVX512 ? X86::VMOVAPSZ128mr_NOVLX :
         HasAVX    ? X86::VMOVAPSmr :
                     X86::MOVAPSmr);
    else
      return load ?
        (HasVLX    ? X86::VMOVUPSZ128rm :
         HasAVX512 ? X86::VMOVUPSZ128rm_NOVLX :
         HasAVX    ? X86::VMOVUPSrm :
                     X86::MOVUPSrm):
        (HasVLX    ? X86::VMOVUPSZ128mr :
         HasAVX512 ? X86::VMOVUPSZ128mr_NOVLX :
         HasAVX    ? X86::VMOVUPSmr :
                     X86::MOVUPSmr);
  }
  if (X86::BNDRRegClass.hasSubClassEq(RC)) {
    if (STI.is64Bit())
      return load ? X86::BNDMOV64rm : X86::BNDMOV64mr;
    else
      return load ? X86::BNDMOV32rm : X86::BNDMOV32mr;
  }
  llvm_unreachable("Unknown 16-byte regclass")__builtin_unreachable();
}
case 32:
  assert(X86::VR256XRegClass.hasSubClassEq(RC) && "Unknown 32-byte regclass")((void)0);
  // If stack is realigned we can use aligned stores.
  if (IsStackAligned)
    return load ?
      (HasVLX    ? X86::VMOVAPSZ256rm :
       HasAVX512 ? X86::VMOVAPSZ256rm_NOVLX :
                   X86::VMOVAPSYrm) :
      (HasVLX    ? X86::VMOVAPSZ256mr :
       HasAVX512 ? X86::VMOVAPSZ256mr_NOVLX :
                   X86::VMOVAPSYmr);
  else
    return load ?
      (HasVLX    ? X86::VMOVUPSZ256rm :
       HasAVX512 ? X86::VMOVUPSZ256rm_NOVLX :
                   X86::VMOVUPSYrm) :
      (HasVLX    ? X86::VMOVUPSZ256mr :
       HasAVX512 ? X86::VMOVUPSZ256mr_NOVLX :
                   X86::VMOVUPSYmr);
case 64:
  assert(X86::VR512RegClass.hasSubClassEq(RC) && "Unknown 64-byte regclass")((void)0);
  assert(STI.hasAVX512() && "Using 512-bit register requires AVX512")((void)0);
  if (IsStackAligned)
    return load ? X86::VMOVAPSZrm : X86::VMOVAPSZmr;
  else
    return load ? X86::VMOVUPSZrm : X86::VMOVUPSZmr;
}
3718}

3720Optional<ExtAddrMode>
3721X86InstrInfo::getAddrModeFromMemoryOp(const MachineInstr &MemI,
                                    const TargetRegisterInfo *TRI) const {
const MCInstrDesc &Desc = MemI.getDesc();
int MemRefBegin = X86II::getMemoryOperandNo(Desc.TSFlags);
if (MemRefBegin < 0)
  return None;

MemRefBegin += X86II::getOperandBias(Desc);

auto &BaseOp = MemI.getOperand(MemRefBegin + X86::AddrBaseReg);
if (!BaseOp.isReg()) // Can be an MO_FrameIndex
  return None;

const MachineOperand &DispMO = MemI.getOperand(MemRefBegin + X86::AddrDisp);
// Displacement can be symbolic
if (!DispMO.isImm())
  return None;

ExtAddrMode AM;
AM.BaseReg = BaseOp.getReg();
AM.ScaledReg = MemI.getOperand(MemRefBegin + X86::AddrIndexReg).getReg();
AM.Scale = MemI.getOperand(MemRefBegin + X86::AddrScaleAmt).getImm();
AM.Displacement = DispMO.getImm();
return AM;
3745}

3747bool X86InstrInfo::getConstValDefinedInReg(const MachineInstr &MI,
                                         const Register Reg,
                                         int64_t &ImmVal) const {
if (MI.getOpcode() != X86::MOV32ri && MI.getOpcode() != X86::MOV64ri)
  return false;
// Mov Src can be a global address.
if (!MI.getOperand(1).isImm() || MI.getOperand(0).getReg() != Reg)
  return false;
ImmVal = MI.getOperand(1).getImm();
return true;
3757}

3759bool X86InstrInfo::preservesZeroValueInReg(
  const MachineInstr *MI, const Register NullValueReg,
  const TargetRegisterInfo *TRI) const {
if (!MI->modifiesRegister(NullValueReg, TRI))
  return true;
switch (MI->getOpcode()) {
// Shift right/left of a null unto itself is still a null, i.e. rax = shl rax
// X.
case X86::SHR64ri:
case X86::SHR32ri:
case X86::SHL64ri:
case X86::SHL32ri:
  assert(MI->getOperand(0).isDef() && MI->getOperand(1).isUse() &&((void)0)
         "expected for shift opcode!")((void)0);
  return MI->getOperand(0).getReg() == NullValueReg &&
         MI->getOperand(1).getReg() == NullValueReg;
// Zero extend of a sub-reg of NullValueReg into itself does not change the
// null value.
case X86::MOV32rr:
  return llvm::all_of(MI->operands(), [&](const MachineOperand &MO) {
    return TRI->isSubRegisterEq(NullValueReg, MO.getReg());
  });
default:
  return false;
}
llvm_unreachable("Should be handled above!")__builtin_unreachable();
3785}

3787bool X86InstrInfo::getMemOperandsWithOffsetWidth(
  const MachineInstr &MemOp, SmallVectorImpl<const MachineOperand *> &BaseOps,
  int64_t &Offset, bool &OffsetIsScalable, unsigned &Width,
  const TargetRegisterInfo *TRI) const {
const MCInstrDesc &Desc = MemOp.getDesc();
int MemRefBegin = X86II::getMemoryOperandNo(Desc.TSFlags);
if (MemRefBegin < 0)
  return false;

MemRefBegin += X86II::getOperandBias(Desc);

const MachineOperand *BaseOp =
    &MemOp.getOperand(MemRefBegin + X86::AddrBaseReg);
if (!BaseOp->isReg()) // Can be an MO_FrameIndex
  return false;

if (MemOp.getOperand(MemRefBegin + X86::AddrScaleAmt).getImm() != 1)
  return false;

if (MemOp.getOperand(MemRefBegin + X86::AddrIndexReg).getReg() !=
    X86::NoRegister)
  return false;

const MachineOperand &DispMO = MemOp.getOperand(MemRefBegin + X86::AddrDisp);

// Displacement can be symbolic
if (!DispMO.isImm())
  return false;

Offset = DispMO.getImm();

if (!BaseOp->isReg())
  return false;

OffsetIsScalable = false;
// FIXME: Relying on memoperands() may not be right thing to do here. Check
// with X86 maintainers, and fix it accordingly. For now, it is ok, since
// there is no use of `Width` for X86 back-end at the moment.
Width =
    !MemOp.memoperands_empty() ? MemOp.memoperands().front()->getSize() : 0;
BaseOps.push_back(BaseOp);
return true;
3829}

3831static unsigned getStoreRegOpcode(Register SrcReg,
                                const TargetRegisterClass *RC,
                                bool IsStackAligned,
                                const X86Subtarget &STI) {
return getLoadStoreRegOpcode(SrcReg, RC, IsStackAligned, STI, false);
3836}

3838static unsigned getLoadRegOpcode(Register DestReg,
                               const TargetRegisterClass *RC,
                               bool IsStackAligned, const X86Subtarget &STI) {
return getLoadStoreRegOpcode(DestReg, RC, IsStackAligned, STI, true);
3842}

3844void X86InstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
                                     MachineBasicBlock::iterator MI,
                                     Register SrcReg, bool isKill, int FrameIdx,
                                     const TargetRegisterClass *RC,
                                     const TargetRegisterInfo *TRI) const {
const MachineFunction &MF = *MBB.getParent();
const MachineFrameInfo &MFI = MF.getFrameInfo();
assert(MFI.getObjectSize(FrameIdx) >= TRI->getSpillSize(*RC) &&((void)0)
       "Stack slot too small for store")((void)0);
if (RC->getID() == X86::TILERegClassID) {
  unsigned Opc = X86::TILESTORED;
  // tilestored %tmm, (%sp, %idx)
  MachineRegisterInfo &RegInfo = MBB.getParent()->getRegInfo();
  Register VirtReg = RegInfo.createVirtualRegister(&X86::GR64_NOSPRegClass);
  BuildMI(MBB, MI, DebugLoc(), get(X86::MOV64ri), VirtReg).addImm(64);
  MachineInstr *NewMI =
      addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc)), FrameIdx)
          .addReg(SrcReg, getKillRegState(isKill));
  MachineOperand &MO = NewMI->getOperand(2);
  MO.setReg(VirtReg);
  MO.setIsKill(true);
} else {
  unsigned Alignment = std::max<uint32_t>(TRI->getSpillSize(*RC), 16);
  bool isAligned =
      (Subtarget.getFrameLowering()->getStackAlign() >= Alignment) ||
      (RI.canRealignStack(MF) && !MFI.isFixedObjectIndex(FrameIdx));
  unsigned Opc = getStoreRegOpcode(SrcReg, RC, isAligned, Subtarget);
  addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc)), FrameIdx)
      .addReg(SrcReg, getKillRegState(isKill));
}
3874}

3876void X86InstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
                                      MachineBasicBlock::iterator MI,
                                      Register DestReg, int FrameIdx,
                                      const TargetRegisterClass *RC,
                                      const TargetRegisterInfo *TRI) const {
if (RC->getID() == X86::TILERegClassID) {
  unsigned Opc = X86::TILELOADD;
  // tileloadd (%sp, %idx), %tmm
  MachineRegisterInfo &RegInfo = MBB.getParent()->getRegInfo();
  Register VirtReg = RegInfo.createVirtualRegister(&X86::GR64_NOSPRegClass);
  MachineInstr *NewMI =
      BuildMI(MBB, MI, DebugLoc(), get(X86::MOV64ri), VirtReg).addImm(64);
  NewMI = addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc), DestReg),
                            FrameIdx);
  MachineOperand &MO = NewMI->getOperand(3);
  MO.setReg(VirtReg);
  MO.setIsKill(true);
} else {
  const MachineFunction &MF = *MBB.getParent();
  const MachineFrameInfo &MFI = MF.getFrameInfo();
  unsigned Alignment = std::max<uint32_t>(TRI->getSpillSize(*RC), 16);
  bool isAligned =
      (Subtarget.getFrameLowering()->getStackAlign() >= Alignment) ||
      (RI.canRealignStack(MF) && !MFI.isFixedObjectIndex(FrameIdx));
  unsigned Opc = getLoadRegOpcode(DestReg, RC, isAligned, Subtarget);
  addFrameReference(BuildMI(MBB, MI, DebugLoc(), get(Opc), DestReg),
                    FrameIdx);
}
3904}

3906bool X86InstrInfo::analyzeCompare(const MachineInstr &MI, Register &SrcReg,
                                Register &SrcReg2, int &CmpMask,
                                int &CmpValue) const {
switch (MI.getOpcode()) {
default: break;
case X86::CMP64ri32:
case X86::CMP64ri8:
case X86::CMP32ri:
case X86::CMP32ri8:
case X86::CMP16ri:
case X86::CMP16ri8:
case X86::CMP8ri:
  SrcReg = MI.getOperand(0).getReg();
  SrcReg2 = 0;
  if (MI.getOperand(1).isImm()) {
    CmpMask = ~0;
    CmpValue = MI.getOperand(1).getImm();
  } else {
    CmpMask = CmpValue = 0;
  }
  return true;
// A SUB can be used to perform comparison.
case X86::SUB64rm:
case X86::SUB32rm:
case X86::SUB16rm:
case X86::SUB8rm:
  SrcReg = MI.getOperand(1).getReg();
  SrcReg2 = 0;
  CmpMask = 0;
  CmpValue = 0;
  return true;
case X86::SUB64rr:
case X86::SUB32rr:
case X86::SUB16rr:
case X86::SUB8rr:
  SrcReg = MI.getOperand(1).getReg();
  SrcReg2 = MI.getOperand(2).getReg();
  CmpMask = 0;
  CmpValue = 0;
  return true;
case X86::SUB64ri32:
case X86::SUB64ri8:
case X86::SUB32ri:
case X86::SUB32ri8:
case X86::SUB16ri:
case X86::SUB16ri8:
case X86::SUB8ri:
  SrcReg = MI.getOperand(1).getReg();
  SrcReg2 = 0;
  if (MI.getOperand(2).isImm()) {
    CmpMask = ~0;
    CmpValue = MI.getOperand(2).getImm();
  } else {
    CmpMask = CmpValue = 0;
  }
  return true;
case X86::CMP64rr:
case X86::CMP32rr:
case X86::CMP16rr:
case X86::CMP8rr:
  SrcReg = MI.getOperand(0).getReg();
  SrcReg2 = MI.getOperand(1).getReg();
  CmpMask = 0;
  CmpValue = 0;
  return true;
case X86::TEST8rr:
case X86::TEST16rr:
case X86::TEST32rr:
case X86::TEST64rr:
  SrcReg = MI.getOperand(0).getReg();
  if (MI.getOperand(1).getReg() != SrcReg)
    return false;
  // Compare against zero.
  SrcReg2 = 0;
  CmpMask = ~0;
  CmpValue = 0;
  return true;
}
return false;
3985}

3987/// Check whether the first instruction, whose only
3988/// purpose is to update flags, can be made redundant.
3989/// CMPrr can be made redundant by SUBrr if the operands are the same.
3990/// This function can be extended later on.
3991/// SrcReg, SrcRegs: register operands for FlagI.
3992/// ImmValue: immediate for FlagI if it takes an immediate.
3993inline static bool isRedundantFlagInstr(const MachineInstr &FlagI,
                                      Register SrcReg, Register SrcReg2,
                                      int ImmMask, int ImmValue,
                                      const MachineInstr &OI) {
if (((FlagI.getOpcode() == X86::CMP64rr && OI.getOpcode() == X86::SUB64rr) ||
     (FlagI.getOpcode() == X86::CMP32rr && OI.getOpcode() == X86::SUB32rr) ||
     (FlagI.getOpcode() == X86::CMP16rr && OI.getOpcode() == X86::SUB16rr) ||
     (FlagI.getOpcode() == X86::CMP8rr && OI.getOpcode() == X86::SUB8rr)) &&
    ((OI.getOperand(1).getReg() == SrcReg &&
      OI.getOperand(2).getReg() == SrcReg2) ||
     (OI.getOperand(1).getReg() == SrcReg2 &&
      OI.getOperand(2).getReg() == SrcReg)))
  return true;

if (ImmMask != 0 &&
    ((FlagI.getOpcode() == X86::CMP64ri32 &&
      OI.getOpcode() == X86::SUB64ri32) ||
     (FlagI.getOpcode() == X86::CMP64ri8 &&
      OI.getOpcode() == X86::SUB64ri8) ||
     (FlagI.getOpcode() == X86::CMP32ri && OI.getOpcode() == X86::SUB32ri) ||
     (FlagI.getOpcode() == X86::CMP32ri8 &&
      OI.getOpcode() == X86::SUB32ri8) ||
     (FlagI.getOpcode() == X86::CMP16ri && OI.getOpcode() == X86::SUB16ri) ||
     (FlagI.getOpcode() == X86::CMP16ri8 &&
      OI.getOpcode() == X86::SUB16ri8) ||
     (FlagI.getOpcode() == X86::CMP8ri && OI.getOpcode() == X86::SUB8ri)) &&
    OI.getOperand(1).getReg() == SrcReg &&
    OI.getOperand(2).getImm() == ImmValue)
  return true;
return false;
4023}

4025/// Check whether the definition can be converted
4026/// to remove a comparison against zero.
4027inline static bool isDefConvertible(const MachineInstr &MI, bool &NoSignFlag,
                                  bool &ClearsOverflowFlag) {
NoSignFlag = false;
ClearsOverflowFlag = false;

switch (MI.getOpcode()) {
default: return false;

// The shift instructions only modify ZF if their shift count is non-zero.
// N.B.: The processor truncates the shift count depending on the encoding.
case X86::SAR8ri:    case X86::SAR16ri:  case X86::SAR32ri:case X86::SAR64ri:
case X86::SHR8ri:    case X86::SHR16ri:  case X86::SHR32ri:case X86::SHR64ri:
   return getTruncatedShiftCount(MI, 2) != 0;

// Some left shift instructions can be turned into LEA instructions but only
// if their flags aren't used. Avoid transforming such instructions.
case X86::SHL8ri:    case X86::SHL16ri:  case X86::SHL32ri:case X86::SHL64ri:{
  unsigned ShAmt = getTruncatedShiftCount(MI, 2);
  if (isTruncatedShiftCountForLEA(ShAmt)) return false;
  return ShAmt != 0;
}

case X86::SHRD16rri8:case X86::SHRD32rri8:case X86::SHRD64rri8:
case X86::SHLD16rri8:case X86::SHLD32rri8:case X86::SHLD64rri8:
   return getTruncatedShiftCount(MI, 3) != 0;

case X86::SUB64ri32: case X86::SUB64ri8: case X86::SUB32ri:
case X86::SUB32ri8:  case X86::SUB16ri:  case X86::SUB16ri8:
case X86::SUB8ri:    case X86::SUB64rr:  case X86::SUB32rr:
case X86::SUB16rr:   case X86::SUB8rr:   case X86::SUB64rm:
case X86::SUB32rm:   case X86::SUB16rm:  case X86::SUB8rm:
case X86::DEC64r:    case X86::DEC32r:   case X86::DEC16r: case X86::DEC8r:
case X86::ADD64ri32: case X86::ADD64ri8: case X86::ADD32ri:
case X86::ADD32ri8:  case X86::ADD16ri:  case X86::ADD16ri8:
case X86::ADD8ri:    case X86::ADD64rr:  case X86::ADD32rr:
case X86::ADD16rr:   case X86::ADD8rr:   case X86::ADD64rm:
case X86::ADD32rm:   case X86::ADD16rm:  case X86::ADD8rm:
case X86::INC64r:    case X86::INC32r:   case X86::INC16r: case X86::INC8r:
case X86::ADC64ri32: case X86::ADC64ri8: case X86::ADC32ri:
case X86::ADC32ri8:  case X86::ADC16ri:  case X86::ADC16ri8:
case X86::ADC8ri:    case X86::ADC64rr:  case X86::ADC32rr:
case X86::ADC16rr:   case X86::ADC8rr:   case X86::ADC64rm:
case X86::ADC32rm:   case X86::ADC16rm:  case X86::ADC8rm:
case X86::SBB64ri32: case X86::SBB64ri8: case X86::SBB32ri:
case X86::SBB32ri8:  case X86::SBB16ri:  case X86::SBB16ri8:
case X86::SBB8ri:    case X86::SBB64rr:  case X86::SBB32rr:
case X86::SBB16rr:   case X86::SBB8rr:   case X86::SBB64rm:
case X86::SBB32rm:   case X86::SBB16rm:  case X86::SBB8rm:
case X86::NEG8r:     case X86::NEG16r:   case X86::NEG32r: case X86::NEG64r:
case X86::SAR8r1:    case X86::SAR16r1:  case X86::SAR32r1:case X86::SAR64r1:
case X86::SHR8r1:    case X86::SHR16r1:  case X86::SHR32r1:case X86::SHR64r1:
case X86::SHL8r1:    case X86::SHL16r1:  case X86::SHL32r1:case X86::SHL64r1:
case X86::LZCNT16rr: case X86::LZCNT16rm:
case X86::LZCNT32rr: case X86::LZCNT32rm:
case X86::LZCNT64rr: case X86::LZCNT64rm:
case X86::POPCNT16rr:case X86::POPCNT16rm:
case X86::POPCNT32rr:case X86::POPCNT32rm:
case X86::POPCNT64rr:case X86::POPCNT64rm:
case X86::TZCNT16rr: case X86::TZCNT16rm:
case X86::TZCNT32rr: case X86::TZCNT32rm:
case X86::TZCNT64rr: case X86::TZCNT64rm:
  return true;
case X86::AND64ri32:   case X86::AND64ri8:  case X86::AND32ri:
case X86::AND32ri8:    case X86::AND16ri:   case X86::AND16ri8:
case X86::AND8ri:      case X86::AND64rr:   case X86::AND32rr:
case X86::AND16rr:     case X86::AND8rr:    case X86::AND64rm:
case X86::AND32rm:     case X86::AND16rm:   case X86::AND8rm:
case X86::XOR64ri32:   case X86::XOR64ri8:  case X86::XOR32ri:
case X86::XOR32ri8:    case X86::XOR16ri:   case X86::XOR16ri8:
case X86::XOR8ri:      case X86::XOR64rr:   case X86::XOR32rr:
case X86::XOR16rr:     case X86::XOR8rr:    case X86::XOR64rm:
case X86::XOR32rm:     case X86::XOR16rm:   case X86::XOR8rm:
case X86::OR64ri32:    case X86::OR64ri8:   case X86::OR32ri:
case X86::OR32ri8:     case X86::OR16ri:    case X86::OR16ri8:
case X86::OR8ri:       case X86::OR64rr:    case X86::OR32rr:
case X86::OR16rr:      case X86::OR8rr:     case X86::OR64rm:
case X86::OR32rm:      case X86::OR16rm:    case X86::OR8rm:
case X86::ANDN32rr:    case X86::ANDN32rm:
case X86::ANDN64rr:    case X86::ANDN64rm:
case X86::BLSI32rr:    case X86::BLSI32rm:
case X86::BLSI64rr:    case X86::BLSI64rm:
case X86::BLSMSK32rr:  case X86::BLSMSK32rm:
case X86::BLSMSK64rr:  case X86::BLSMSK64rm:
case X86::BLSR32rr:    case X86::BLSR32rm:
case X86::BLSR64rr:    case X86::BLSR64rm:
case X86::BLCFILL32rr: case X86::BLCFILL32rm:
case X86::BLCFILL64rr: case X86::BLCFILL64rm:
case X86::BLCI32rr:    case X86::BLCI32rm:
case X86::BLCI64rr:    case X86::BLCI64rm:
case X86::BLCIC32rr:   case X86::BLCIC32rm:
case X86::BLCIC64rr:   case X86::BLCIC64rm:
case X86::BLCMSK32rr:  case X86::BLCMSK32rm:
case X86::BLCMSK64rr:  case X86::BLCMSK64rm:
case X86::BLCS32rr:    case X86::BLCS32rm:
case X86::BLCS64rr:    case X86::BLCS64rm:
case X86::BLSFILL32rr: case X86::BLSFILL32rm:
case X86::BLSFILL64rr: case X86::BLSFILL64rm:
case X86::BLSIC32rr:   case X86::BLSIC32rm:
case X86::BLSIC64rr:   case X86::BLSIC64rm:
case X86::BZHI32rr:    case X86::BZHI32rm:
case X86::BZHI64rr:    case X86::BZHI64rm:
case X86::T1MSKC32rr:  case X86::T1MSKC32rm:
case X86::T1MSKC64rr:  case X86::T1MSKC64rm:
case X86::TZMSK32rr:   case X86::TZMSK32rm:
case X86::TZMSK64rr:   case X86::TZMSK64rm:
  // These instructions clear the overflow flag just like TEST.
  // FIXME: These are not the only instructions in this switch that clear the
  // overflow flag.
  ClearsOverflowFlag = true;
  return true;
case X86::BEXTR32rr:   case X86::BEXTR64rr:
case X86::BEXTR32rm:   case X86::BEXTR64rm:
case X86::BEXTRI32ri:  case X86::BEXTRI32mi:
case X86::BEXTRI64ri:  case X86::BEXTRI64mi:
  // BEXTR doesn't update the sign flag so we can't use it. It does clear
  // the overflow flag, but that's not useful without the sign flag.
  NoSignFlag = true;
  return true;
}
4146}

4148/// Check whether the use can be converted to remove a comparison against zero.
4149static X86::CondCode isUseDefConvertible(const MachineInstr &MI) {
switch (MI.getOpcode()) {
default: return X86::COND_INVALID;
case X86::NEG8r:
case X86::NEG16r:
case X86::NEG32r:
case X86::NEG64r:
  return X86::COND_AE;
case X86::LZCNT16rr:
case X86::LZCNT32rr:
case X86::LZCNT64rr:
  return X86::COND_B;
case X86::POPCNT16rr:
case X86::POPCNT32rr:
case X86::POPCNT64rr:
  return X86::COND_E;
case X86::TZCNT16rr:
case X86::TZCNT32rr:
case X86::TZCNT64rr:
  return X86::COND_B;
case X86::BSF16rr:
case X86::BSF32rr:
case X86::BSF64rr:
case X86::BSR16rr:
case X86::BSR32rr:
case X86::BSR64rr:
  return X86::COND_E;
case X86::BLSI32rr:
case X86::BLSI64rr:
  return X86::COND_AE;
case X86::BLSR32rr:
case X86::BLSR64rr:
case X86::BLSMSK32rr:
case X86::BLSMSK64rr:
  return X86::COND_B;
// TODO: TBM instructions.
}
4186}

4188/// Check if there exists an earlier instruction that
4189/// operates on the same source operands and sets flags in the same way as
4190/// Compare; remove Compare if possible.
4191bool X86InstrInfo::optimizeCompareInstr(MachineInstr &CmpInstr, Register SrcReg,
                                      Register SrcReg2, int CmpMask,
                                      int CmpValue,
                                      const MachineRegisterInfo *MRI) const {
// Check whether we can replace SUB with CMP.
switch (CmpInstr.getOpcode()) {
default: break;
case X86::SUB64ri32:
case X86::SUB64ri8:
case X86::SUB32ri:
case X86::SUB32ri8:
case X86::SUB16ri:
case X86::SUB16ri8:
case X86::SUB8ri:
case X86::SUB64rm:
case X86::SUB32rm:
case X86::SUB16rm:
case X86::SUB8rm:
case X86::SUB64rr:
case X86::SUB32rr:
case X86::SUB16rr:
case X86::SUB8rr: {
  if (!MRI->use_nodbg_empty(CmpInstr.getOperand(0).getReg()))
    return false;
  // There is no use of the destination register, we can replace SUB with CMP.
  unsigned NewOpcode = 0;
  switch (CmpInstr.getOpcode()) {
  default: llvm_unreachable("Unreachable!")__builtin_unreachable();
  case X86::SUB64rm:   NewOpcode = X86::CMP64rm;   break;
  case X86::SUB32rm:   NewOpcode = X86::CMP32rm;   break;
  case X86::SUB16rm:   NewOpcode = X86::CMP16rm;   break;
  case X86::SUB8rm:    NewOpcode = X86::CMP8rm;    break;
  case X86::SUB64rr:   NewOpcode = X86::CMP64rr;   break;
  case X86::SUB32rr:   NewOpcode = X86::CMP32rr;   break;
  case X86::SUB16rr:   NewOpcode = X86::CMP16rr;   break;
  case X86::SUB8rr:    NewOpcode = X86::CMP8rr;    break;
  case X86::SUB64ri32: NewOpcode = X86::CMP64ri32; break;
  case X86::SUB64ri8:  NewOpcode = X86::CMP64ri8;  break;
  case X86::SUB32ri:   NewOpcode = X86::CMP32ri;   break;
  case X86::SUB32ri8:  NewOpcode = X86::CMP32ri8;  break;
  case X86::SUB16ri:   NewOpcode = X86::CMP16ri;   break;
  case X86::SUB16ri8:  NewOpcode = X86::CMP16ri8;  break;
  case X86::SUB8ri:    NewOpcode = X86::CMP8ri;    break;
  }
  CmpInstr.setDesc(get(NewOpcode));
  CmpInstr.RemoveOperand(0);
  // Mutating this instruction invalidates any debug data associated with it.
  CmpInstr.dropDebugNumber();
  // Fall through to optimize Cmp if Cmp is CMPrr or CMPri.
  if (NewOpcode == X86::CMP64rm || NewOpcode == X86::CMP32rm ||
      NewOpcode == X86::CMP16rm || NewOpcode == X86::CMP8rm)
    return false;
}
}

// Get the unique definition of SrcReg.
MachineInstr *MI = MRI->getUniqueVRegDef(SrcReg);
if (!MI) return false;

// CmpInstr is the first instruction of the BB.
MachineBasicBlock::iterator I = CmpInstr, Def = MI;

// If we are comparing against zero, check whether we can use MI to update
// EFLAGS. If MI is not in the same BB as CmpInstr, do not optimize.
bool IsCmpZero = (CmpMask != 0 && CmpValue == 0);
if (IsCmpZero && MI->getParent() != CmpInstr.getParent())
  return false;

// If we have a use of the source register between the def and our compare
// instruction we can eliminate the compare iff the use sets EFLAGS in the
// right way.
bool ShouldUpdateCC = false;
bool NoSignFlag = false;
bool ClearsOverflowFlag = false;
X86::CondCode NewCC = X86::COND_INVALID;
if (IsCmpZero && !isDefConvertible(*MI, NoSignFlag, ClearsOverflowFlag)) {
  // Scan forward from the use until we hit the use we're looking for or the
  // compare instruction.
  for (MachineBasicBlock::iterator J = MI;; ++J) {
    // Do we have a convertible instruction?
    NewCC = isUseDefConvertible(*J);
    if (NewCC != X86::COND_INVALID && J->getOperand(1).isReg() &&
        J->getOperand(1).getReg() == SrcReg) {
      assert(J->definesRegister(X86::EFLAGS) && "Must be an EFLAGS def!")((void)0);
      ShouldUpdateCC = true; // Update CC later on.
      // This is not a def of SrcReg, but still a def of EFLAGS. Keep going
      // with the new def.
      Def = J;
      MI = &*Def;
      break;
    }

    if (J == I)
      return false;
  }
}

// We are searching for an earlier instruction that can make CmpInstr
// redundant and that instruction will be saved in Sub.
MachineInstr *Sub = nullptr;
const TargetRegisterInfo *TRI = &getRegisterInfo();

// We iterate backward, starting from the instruction before CmpInstr and
// stop when reaching the definition of a source register or done with the BB.
// RI points to the instruction before CmpInstr.
// If the definition is in this basic block, RE points to the definition;
// otherwise, RE is the rend of the basic block.
MachineBasicBlock::reverse_iterator
    RI = ++I.getReverse(),
    RE = CmpInstr.getParent() == MI->getParent()
             ? Def.getReverse() /* points to MI */
             : CmpInstr.getParent()->rend();
MachineInstr *Movr0Inst = nullptr;
for (; RI != RE; ++RI) {
  MachineInstr &Instr = *RI;
  // Check whether CmpInstr can be made redundant by the current instruction.
  if (!IsCmpZero && isRedundantFlagInstr(CmpInstr, SrcReg, SrcReg2, CmpMask,
                                         CmpValue, Instr)) {
    Sub = &Instr;
    break;
  }

  if (Instr.modifiesRegister(X86::EFLAGS, TRI) ||
      Instr.readsRegister(X86::EFLAGS, TRI)) {
    // This instruction modifies or uses EFLAGS.

    // MOV32r0 etc. are implemented with xor which clobbers condition code.
    // They are safe to move up, if the definition to EFLAGS is dead and
    // earlier instructions do not read or write EFLAGS.
    if (!Movr0Inst && Instr.getOpcode() == X86::MOV32r0 &&
        Instr.registerDefIsDead(X86::EFLAGS, TRI)) {
      Movr0Inst = &Instr;
      continue;
    }

    // We can't remove CmpInstr.
    return false;
  }
}

// Return false if no candidates exist.
if (!IsCmpZero && !Sub)
  return false;

bool IsSwapped =
    (SrcReg2 != 0 && Sub && Sub->getOperand(1).getReg() == SrcReg2 &&
     Sub->getOperand(2).getReg() == SrcReg);

// Scan forward from the instruction after CmpInstr for uses of EFLAGS.
// It is safe to remove CmpInstr if EFLAGS is redefined or killed.
// If we are done with the basic block, we need to check whether EFLAGS is
// live-out.
bool IsSafe = false;
SmallVector<std::pair<MachineInstr*, X86::CondCode>, 4> OpsToUpdate;
MachineBasicBlock::iterator E = CmpInstr.getParent()->end();
for (++I; I != E; ++I) {
  const MachineInstr &Instr = *I;
  bool ModifyEFLAGS = Instr.modifiesRegister(X86::EFLAGS, TRI);
  bool UseEFLAGS = Instr.readsRegister(X86::EFLAGS, TRI);
  // We should check the usage if this instruction uses and updates EFLAGS.
  if (!UseEFLAGS && ModifyEFLAGS) {
    // It is safe to remove CmpInstr if EFLAGS is updated again.
    IsSafe = true;
    break;
  }
  if (!UseEFLAGS && !ModifyEFLAGS)
    continue;

  // EFLAGS is used by this instruction.
  X86::CondCode OldCC = X86::COND_INVALID;
  if (IsCmpZero || IsSwapped) {
    // We decode the condition code from opcode.
    if (Instr.isBranch())
      OldCC = X86::getCondFromBranch(Instr);
    else {
      OldCC = X86::getCondFromSETCC(Instr);
      if (OldCC == X86::COND_INVALID)
        OldCC = X86::getCondFromCMov(Instr);
    }
    if (OldCC == X86::COND_INVALID) return false;
  }
  X86::CondCode ReplacementCC = X86::COND_INVALID;
  if (IsCmpZero) {
    switch (OldCC) {
    default: break;
    case X86::COND_A: case X86::COND_AE:
    case X86::COND_B: case X86::COND_BE:
      // CF is used, we can't perform this optimization.
      return false;
    case X86::COND_G: case X86::COND_GE:
    case X86::COND_L: case X86::COND_LE:
    case X86::COND_O: case X86::COND_NO:
      // If OF is used, the instruction needs to clear it like CmpZero does.
      if (!ClearsOverflowFlag)
        return false;
      break;
    case X86::COND_S: case X86::COND_NS:
      // If SF is used, but the instruction doesn't update the SF, then we
      // can't do the optimization.
      if (NoSignFlag)
        return false;
      break;
    }

    // If we're updating the condition code check if we have to reverse the
    // condition.
    if (ShouldUpdateCC)
      switch (OldCC) {
      default:
        return false;
      case X86::COND_E:
        ReplacementCC = NewCC;
        break;
      case X86::COND_NE:
        ReplacementCC = GetOppositeBranchCondition(NewCC);
        break;
      }
  } else if (IsSwapped) {
    // If we have SUB(r1, r2) and CMP(r2, r1), the condition code needs
    // to be changed from r2 > r1 to r1 < r2, from r2 < r1 to r1 > r2, etc.
    // We swap the condition code and synthesize the new opcode.
    ReplacementCC = getSwappedCondition(OldCC);
    if (ReplacementCC == X86::COND_INVALID) return false;
  }

  if ((ShouldUpdateCC || IsSwapped) && ReplacementCC != OldCC) {
    // Push the MachineInstr to OpsToUpdate.
    // If it is safe to remove CmpInstr, the condition code of these
    // instructions will be modified.
    OpsToUpdate.push_back(std::make_pair(&*I, ReplacementCC));
  }
  if (ModifyEFLAGS || Instr.killsRegister(X86::EFLAGS, TRI)) {
    // It is safe to remove CmpInstr if EFLAGS is updated again or killed.
    IsSafe = true;
    break;
  }
}

// If EFLAGS is not killed nor re-defined, we should check whether it is
// live-out. If it is live-out, do not optimize.
if ((IsCmpZero || IsSwapped) && !IsSafe) {
  MachineBasicBlock *MBB = CmpInstr.getParent();
  for (MachineBasicBlock *Successor : MBB->successors())
    if (Successor->isLiveIn(X86::EFLAGS))
      return false;
}

// The instruction to be updated is either Sub or MI.
Sub = IsCmpZero ? MI : Sub;
// Move Movr0Inst to the appropriate place before Sub.
if (Movr0Inst) {
  // Look backwards until we find a def that doesn't use the current EFLAGS.
  Def = Sub;
  MachineBasicBlock::reverse_iterator InsertI = Def.getReverse(),
                                      InsertE = Sub->getParent()->rend();
  for (; InsertI != InsertE; ++InsertI) {
    MachineInstr *Instr = &*InsertI;
    if (!Instr->readsRegister(X86::EFLAGS, TRI) &&
        Instr->modifiesRegister(X86::EFLAGS, TRI)) {
      Sub->getParent()->remove(Movr0Inst);
      Instr->getParent()->insert(MachineBasicBlock::iterator(Instr),
                                 Movr0Inst);
      break;
    }
  }
  if (InsertI == InsertE)
    return false;
}

// Make sure Sub instruction defines EFLAGS and mark the def live.
MachineOperand *FlagDef = Sub->findRegisterDefOperand(X86::EFLAGS);
assert(FlagDef && "Unable to locate a def EFLAGS operand")((void)0);
FlagDef->setIsDead(false);

CmpInstr.eraseFromParent();

// Modify the condition code of instructions in OpsToUpdate.
for (auto &Op : OpsToUpdate) {
  Op.first->getOperand(Op.first->getDesc().getNumOperands() - 1)
      .setImm(Op.second);
}
return true;
4473}

4475/// Try to remove the load by folding it to a register
4476/// operand at the use. We fold the load instructions if load defines a virtual
4477/// register, the virtual register is used once in the same BB, and the
4478/// instructions in-between do not load or store, and have no side effects.
4479MachineInstr *X86InstrInfo::optimizeLoadInstr(MachineInstr &MI,
                                            const MachineRegisterInfo *MRI,
                                            Register &FoldAsLoadDefReg,
                                            MachineInstr *&DefMI) const {
// Check whether we can move DefMI here.
DefMI = MRI->getVRegDef(FoldAsLoadDefReg);
assert(DefMI)((void)0);
bool SawStore = false;
if (!DefMI->isSafeToMove(nullptr, SawStore))
  return nullptr;

// Collect information about virtual register operands of MI.
SmallVector<unsigned, 1> SrcOperandIds;
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
  MachineOperand &MO = MI.getOperand(i);
  if (!MO.isReg())
    continue;
  Register Reg = MO.getReg();
  if (Reg != FoldAsLoadDefReg)
    continue;
  // Do not fold if we have a subreg use or a def.
  if (MO.getSubReg() || MO.isDef())
    return nullptr;
  SrcOperandIds.push_back(i);
}
if (SrcOperandIds.empty())
  return nullptr;

// Check whether we can fold the def into SrcOperandId.
if (MachineInstr *FoldMI = foldMemoryOperand(MI, SrcOperandIds, *DefMI)) {
  FoldAsLoadDefReg = 0;
  return FoldMI;
}

return nullptr;
4514}

4516/// Expand a single-def pseudo instruction to a two-addr
4517/// instruction with two undef reads of the register being defined.
4518/// This is used for mapping:
4519///   %xmm4 = V_SET0
4520/// to:
4521///   %xmm4 = PXORrr undef %xmm4, undef %xmm4
4522///
4523static bool Expand2AddrUndef(MachineInstrBuilder &MIB,
                           const MCInstrDesc &Desc) {
assert(Desc.getNumOperands() == 3 && "Expected two-addr instruction.")((void)0);
Register Reg = MIB.getReg(0);
MIB->setDesc(Desc);

// MachineInstr::addOperand() will insert explicit operands before any
// implicit operands.
MIB.addReg(Reg, RegState::Undef).addReg(Reg, RegState::Undef);
// But we don't trust that.
assert(MIB.getReg(1) == Reg &&((void)0)
       MIB.getReg(2) == Reg && "Misplaced operand")((void)0);
return true;
4536}

4538/// Expand a single-def pseudo instruction to a two-addr
4539/// instruction with two %k0 reads.
4540/// This is used for mapping:
4541///   %k4 = K_SET1
4542/// to:
4543///   %k4 = KXNORrr %k0, %k0
4544static bool Expand2AddrKreg(MachineInstrBuilder &MIB, const MCInstrDesc &Desc,
                          Register Reg) {
assert(Desc.getNumOperands() == 3 && "Expected two-addr instruction.")((void)0);
MIB->setDesc(Desc);
MIB.addReg(Reg, RegState::Undef).addReg(Reg, RegState::Undef);
return true;
4550}

4552static bool expandMOV32r1(MachineInstrBuilder &MIB, const TargetInstrInfo &TII,
                        bool MinusOne) {
MachineBasicBlock &MBB = *MIB->getParent();
const DebugLoc &DL = MIB->getDebugLoc();
Register Reg = MIB.getReg(0);

// Insert the XOR.
BuildMI(MBB, MIB.getInstr(), DL, TII.get(X86::XOR32rr), Reg)
    .addReg(Reg, RegState::Undef)
    .addReg(Reg, RegState::Undef);

// Turn the pseudo into an INC or DEC.
MIB->setDesc(TII.get(MinusOne ? X86::DEC32r : X86::INC32r));
MIB.addReg(Reg);

return true;
4568}

4570static bool ExpandMOVImmSExti8(MachineInstrBuilder &MIB,
                             const TargetInstrInfo &TII,
                             const X86Subtarget &Subtarget) {
MachineBasicBlock &MBB = *MIB->getParent();
const DebugLoc &DL = MIB->getDebugLoc();
int64_t Imm = MIB->getOperand(1).getImm();
assert(Imm != 0 && "Using push/pop for 0 is not efficient.")((void)0);
MachineBasicBlock::iterator I = MIB.getInstr();

int StackAdjustment;

if (Subtarget.is64Bit()) {
  assert(MIB->getOpcode() == X86::MOV64ImmSExti8 ||((void)0)
         MIB->getOpcode() == X86::MOV32ImmSExti8)((void)0);

  // Can't use push/pop lowering if the function might write to the red zone.
  X86MachineFunctionInfo *X86FI =
      MBB.getParent()->getInfo<X86MachineFunctionInfo>();
  if (X86FI->getUsesRedZone()) {
    MIB->setDesc(TII.get(MIB->getOpcode() ==
                         X86::MOV32ImmSExti8 ? X86::MOV32ri : X86::MOV64ri));
    return true;
  }

  // 64-bit mode doesn't have 32-bit push/pop, so use 64-bit operations and
  // widen the register if necessary.
  StackAdjustment = 8;
  BuildMI(MBB, I, DL, TII.get(X86::PUSH64i8)).addImm(Imm);
  MIB->setDesc(TII.get(X86::POP64r));
  MIB->getOperand(0)
      .setReg(getX86SubSuperRegister(MIB.getReg(0), 64));
} else {
  assert(MIB->getOpcode() == X86::MOV32ImmSExti8)((void)0);
  StackAdjustment = 4;
  BuildMI(MBB, I, DL, TII.get(X86::PUSH32i8)).addImm(Imm);
  MIB->setDesc(TII.get(X86::POP32r));
}
MIB->RemoveOperand(1);
MIB->addImplicitDefUseOperands(*MBB.getParent());

// Build CFI if necessary.
MachineFunction &MF = *MBB.getParent();
const X86FrameLowering *TFL = Subtarget.getFrameLowering();
bool IsWin64Prologue = MF.getTarget().getMCAsmInfo()->usesWindowsCFI();
bool NeedsDwarfCFI = !IsWin64Prologue && MF.needsFrameMoves();
bool EmitCFI = !TFL->hasFP(MF) && NeedsDwarfCFI;
if (EmitCFI) {
  TFL->BuildCFI(MBB, I, DL,
      MCCFIInstruction::createAdjustCfaOffset(nullptr, StackAdjustment));
  TFL->BuildCFI(MBB, std::next(I), DL,
      MCCFIInstruction::createAdjustCfaOffset(nullptr, -StackAdjustment));
}

return true;
4624}

4626// LoadStackGuard has so far only been implemented for 64-bit MachO. Different
4627// code sequence is needed for other targets.
4628static void expandLoadStackGuard(MachineInstrBuilder &MIB,
                               const TargetInstrInfo &TII) {
MachineBasicBlock &MBB = *MIB->getParent();
const DebugLoc &DL = MIB->getDebugLoc();
Register Reg = MIB.getReg(0);
const GlobalValue *GV =
    cast<GlobalValue>((*MIB->memoperands_begin())->getValue());
auto Flags = MachineMemOperand::MOLoad |
             MachineMemOperand::MODereferenceable |
             MachineMemOperand::MOInvariant;
MachineMemOperand *MMO = MBB.getParent()->getMachineMemOperand(
    MachinePointerInfo::getGOT(*MBB.getParent()), Flags, 8, Align(8));
MachineBasicBlock::iterator I = MIB.getInstr();

BuildMI(MBB, I, DL, TII.get(X86::MOV64rm), Reg).addReg(X86::RIP).addImm(1)
    .addReg(0).addGlobalAddress(GV, 0, X86II::MO_GOTPCREL).addReg(0)
    .addMemOperand(MMO);
MIB->setDebugLoc(DL);
MIB->setDesc(TII.get(X86::MOV64rm));
MIB.addReg(Reg, RegState::Kill).addImm(1).addReg(0).addImm(0).addReg(0);
4648}

4650static bool expandXorFP(MachineInstrBuilder &MIB, const TargetInstrInfo &TII) {
MachineBasicBlock &MBB = *MIB->getParent();
MachineFunction &MF = *MBB.getParent();
const X86Subtarget &Subtarget = MF.getSubtarget<X86Subtarget>();
const X86RegisterInfo *TRI = Subtarget.getRegisterInfo();
unsigned XorOp =
    MIB->getOpcode() == X86::XOR64_FP ? X86::XOR64rr : X86::XOR32rr;
MIB->setDesc(TII.get(XorOp));
MIB.addReg(TRI->getFrameRegister(MF), RegState::Undef);
return true;
4660}

4662// This is used to handle spills for 128/256-bit registers when we have AVX512,
4663// but not VLX. If it uses an extended register we need to use an instruction
4664// that loads the lower 128/256-bit, but is available with only AVX512F.
4665static bool expandNOVLXLoad(MachineInstrBuilder &MIB,
                          const TargetRegisterInfo *TRI,
                          const MCInstrDesc &LoadDesc,
                          const MCInstrDesc &BroadcastDesc,
                          unsigned SubIdx) {
Register DestReg = MIB.getReg(0);
// Check if DestReg is XMM16-31 or YMM16-31.
if (TRI->getEncodingValue(DestReg) < 16) {
  // We can use a normal VEX encoded load.
  MIB->setDesc(LoadDesc);
} else {
  // Use a 128/256-bit VBROADCAST instruction.
  MIB->setDesc(BroadcastDesc);
  // Change the destination to a 512-bit register.
  DestReg = TRI->getMatchingSuperReg(DestReg, SubIdx, &X86::VR512RegClass);
  MIB->getOperand(0).setReg(DestReg);
}
return true;
4683}

4685// This is used to handle spills for 128/256-bit registers when we have AVX512,
4686// but not VLX. If it uses an extended register we need to use an instruction
4687// that stores the lower 128/256-bit, but is available with only AVX512F.
4688static bool expandNOVLXStore(MachineInstrBuilder &MIB,
                           const TargetRegisterInfo *TRI,
                           const MCInstrDesc &StoreDesc,
                           const MCInstrDesc &ExtractDesc,
                           unsigned SubIdx) {
Register SrcReg = MIB.getReg(X86::AddrNumOperands);
// Check if DestReg is XMM16-31 or YMM16-31.
if (TRI->getEncodingValue(SrcReg) < 16) {
  // We can use a normal VEX encoded store.
  MIB->setDesc(StoreDesc);
} else {
  // Use a VEXTRACTF instruction.
  MIB->setDesc(ExtractDesc);
  // Change the destination to a 512-bit register.
  SrcReg = TRI->getMatchingSuperReg(SrcReg, SubIdx, &X86::VR512RegClass);
  MIB->getOperand(X86::AddrNumOperands).setReg(SrcReg);
  MIB.addImm(0x0); // Append immediate to extract from the lower bits.
}

return true;
4708}

4710static bool expandSHXDROT(MachineInstrBuilder &MIB, const MCInstrDesc &Desc) {
MIB->setDesc(Desc);
int64_t ShiftAmt = MIB->getOperand(2).getImm();
// Temporarily remove the immediate so we can add another source register.
MIB->RemoveOperand(2);
// Add the register. Don't copy the kill flag if there is one.
MIB.addReg(MIB.getReg(1),
           getUndefRegState(MIB->getOperand(1).isUndef()));
// Add back the immediate.
MIB.addImm(ShiftAmt);
return true;
4721}

4723bool X86InstrInfo::expandPostRAPseudo(MachineInstr &MI) const {
bool HasAVX = Subtarget.hasAVX();
MachineInstrBuilder MIB(*MI.getParent()->getParent(), MI);
switch (MI.getOpcode()) {
case X86::MOV32r0:
  return Expand2AddrUndef(MIB, get(X86::XOR32rr));
case X86::MOV32r1:
  return expandMOV32r1(MIB, *this, /*MinusOne=*/ false);
case X86::MOV32r_1:
  return expandMOV32r1(MIB, *this, /*MinusOne=*/ true);
case X86::MOV32ImmSExti8:
case X86::MOV64ImmSExti8:
  return ExpandMOVImmSExti8(MIB, *this, Subtarget);
case X86::SETB_C32r:
  return Expand2AddrUndef(MIB, get(X86::SBB32rr));
case X86::SETB_C64r:
  return Expand2AddrUndef(MIB, get(X86::SBB64rr));
case X86::MMX_SET0:
  return Expand2AddrUndef(MIB, get(X86::MMX_PXORirr));
case X86::V_SET0:
case X86::FsFLD0SS:
case X86::FsFLD0SD:
case X86::FsFLD0F128:
  return Expand2AddrUndef(MIB, get(HasAVX ? X86::VXORPSrr : X86::XORPSrr));
case X86::AVX_SET0: {
  assert(HasAVX && "AVX not supported")((void)0);
  const TargetRegisterInfo *TRI = &getRegisterInfo();
  Register SrcReg = MIB.getReg(0);
  Register XReg = TRI->getSubReg(SrcReg, X86::sub_xmm);
  MIB->getOperand(0).setReg(XReg);
  Expand2AddrUndef(MIB, get(X86::VXORPSrr));
  MIB.addReg(SrcReg, RegState::ImplicitDefine);
  return true;
}
case X86::AVX512_128_SET0:
case X86::AVX512_FsFLD0SS:
case X86::AVX512_FsFLD0SD:
case X86::AVX512_FsFLD0F128: {
  bool HasVLX = Subtarget.hasVLX();
  Register SrcReg = MIB.getReg(0);
  const TargetRegisterInfo *TRI = &getRegisterInfo();
  if (HasVLX || TRI->getEncodingValue(SrcReg) < 16)
    return Expand2AddrUndef(MIB,
                            get(HasVLX ? X86::VPXORDZ128rr : X86::VXORPSrr));
  // Extended register without VLX. Use a larger XOR.
  SrcReg =
      TRI->getMatchingSuperReg(SrcReg, X86::sub_xmm, &X86::VR512RegClass);
  MIB->getOperand(0).setReg(SrcReg);
  return Expand2AddrUndef(MIB, get(X86::VPXORDZrr));
}
case X86::AVX512_256_SET0:
case X86::AVX512_512_SET0: {
  bool HasVLX = Subtarget.hasVLX();
  Register SrcReg = MIB.getReg(0);
  const TargetRegisterInfo *TRI = &getRegisterInfo();
  if (HasVLX || TRI->getEncodingValue(SrcReg) < 16) {
    Register XReg = TRI->getSubReg(SrcReg, X86::sub_xmm);
    MIB->getOperand(0).setReg(XReg);
    Expand2AddrUndef(MIB,
                     get(HasVLX ? X86::VPXORDZ128rr : X86::VXORPSrr));
    MIB.addReg(SrcReg, RegState::ImplicitDefine);
    return true;
  }
  if (MI.getOpcode() == X86::AVX512_256_SET0) {
    // No VLX so we must reference a zmm.
    unsigned ZReg =
      TRI->getMatchingSuperReg(SrcReg, X86::sub_ymm, &X86::VR512RegClass);
    MIB->getOperand(0).setReg(ZReg);
  }
  return Expand2AddrUndef(MIB, get(X86::VPXORDZrr));
}
case X86::V_SETALLONES:
  return Expand2AddrUndef(MIB, get(HasAVX ? X86::VPCMPEQDrr : X86::PCMPEQDrr));
case X86::AVX2_SETALLONES:
  return Expand2AddrUndef(MIB, get(X86::VPCMPEQDYrr));
case X86::AVX1_SETALLONES: {
  Register Reg = MIB.getReg(0);
  // VCMPPSYrri with an immediate 0xf should produce VCMPTRUEPS.
  MIB->setDesc(get(X86::VCMPPSYrri));
  MIB.addReg(Reg, RegState::Undef).addReg(Reg, RegState::Undef).addImm(0xf);
  return true;
}
case X86::AVX512_512_SETALLONES: {
  Register Reg = MIB.getReg(0);
  MIB->setDesc(get(X86::VPTERNLOGDZrri));
  // VPTERNLOGD needs 3 register inputs and an immediate.
  // 0xff will return 1s for any input.
  MIB.addReg(Reg, RegState::Undef).addReg(Reg, RegState::Undef)
     .addReg(Reg, RegState::Undef).addImm(0xff);
  return true;
}
case X86::AVX512_512_SEXT_MASK_32:
case X86::AVX512_512_SEXT_MASK_64: {
  Register Reg = MIB.getReg(0);
  Register MaskReg = MIB.getReg(1);
  unsigned MaskState = getRegState(MIB->getOperand(1));
  unsigned Opc = (MI.getOpcode() == X86::AVX512_512_SEXT_MASK_64) ?
                 X86::VPTERNLOGQZrrikz : X86::VPTERNLOGDZrrikz;
  MI.RemoveOperand(1);
  MIB->setDesc(get(Opc));
  // VPTERNLOG needs 3 register inputs and an immediate.
  // 0xff will return 1s for any input.
  MIB.addReg(Reg, RegState::Undef).addReg(MaskReg, MaskState)
     .addReg(Reg, RegState::Undef).addReg(Reg, RegState::Undef).addImm(0xff);
  return true;
}
case X86::VMOVAPSZ128rm_NOVLX:
  return expandNOVLXLoad(MIB, &getRegisterInfo(), get(X86::VMOVAPSrm),
                         get(X86::VBROADCASTF32X4rm), X86::sub_xmm);
case X86::VMOVUPSZ128rm_NOVLX:
  return expandNOVLXLoad(MIB, &getRegisterInfo(), get(X86::VMOVUPSrm),
                         get(X86::VBROADCASTF32X4rm), X86::sub_xmm);
case X86::VMOVAPSZ256rm_NOVLX:
  return expandNOVLXLoad(MIB, &getRegisterInfo(), get(X86::VMOVAPSYrm),
                         get(X86::VBROADCASTF64X4rm), X86::sub_ymm);
case X86::VMOVUPSZ256rm_NOVLX:
  return expandNOVLXLoad(MIB, &getRegisterInfo(), get(X86::VMOVUPSYrm),
                         get(X86::VBROADCASTF64X4rm), X86::sub_ymm);
case X86::VMOVAPSZ128mr_NOVLX:
  return expandNOVLXStore(MIB, &getRegisterInfo(), get(X86::VMOVAPSmr),
                          get(X86::VEXTRACTF32x4Zmr), X86::sub_xmm);
case X86::VMOVUPSZ128mr_NOVLX:
  return expandNOVLXStore(MIB, &getRegisterInfo(), get(X86::VMOVUPSmr),
                          get(X86::VEXTRACTF32x4Zmr), X86::sub_xmm);
case X86::VMOVAPSZ256mr_NOVLX:
  return expandNOVLXStore(MIB, &getRegisterInfo(), get(X86::VMOVAPSYmr),
                          get(X86::VEXTRACTF64x4Zmr), X86::sub_ymm);
case X86::VMOVUPSZ256mr_NOVLX:
  return expandNOVLXStore(MIB, &getRegisterInfo(), get(X86::VMOVUPSYmr),
                          get(X86::VEXTRACTF64x4Zmr), X86::sub_ymm);
case X86::MOV32ri64: {
  Register Reg = MIB.getReg(0);
  Register Reg32 = RI.getSubReg(Reg, X86::sub_32bit);
  MI.setDesc(get(X86::MOV32ri));
  MIB->getOperand(0).setReg(Reg32);
  MIB.addReg(Reg, RegState::ImplicitDefine);
  return true;
}

// KNL does not recognize dependency-breaking idioms for mask registers,
// so kxnor %k1, %k1, %k2 has a RAW dependence on %k1.
// Using %k0 as the undef input register is a performance heuristic based
// on the assumption that %k0 is used less frequently than the other mask
// registers, since it is not usable as a write mask.
// FIXME: A more advanced approach would be to choose the best input mask
// register based on context.
case X86::KSET0W: return Expand2AddrKreg(MIB, get(X86::KXORWrr), X86::K0);
case X86::KSET0D: return Expand2AddrKreg(MIB, get(X86::KXORDrr), X86::K0);
case X86::KSET0Q: return Expand2AddrKreg(MIB, get(X86::KXORQrr), X86::K0);
case X86::KSET1W: return Expand2AddrKreg(MIB, get(X86::KXNORWrr), X86::K0);
case X86::KSET1D: return Expand2AddrKreg(MIB, get(X86::KXNORDrr), X86::K0);
case X86::KSET1Q: return Expand2AddrKreg(MIB, get(X86::KXNORQrr), X86::K0);
case TargetOpcode::LOAD_STACK_GUARD:
  expandLoadStackGuard(MIB, *this);
  return true;
case X86::XOR64_FP:
case X86::XOR32_FP:
  return expandXorFP(MIB, *this);
case X86::SHLDROT32ri: return expandSHXDROT(MIB, get(X86::SHLD32rri8));
case X86::SHLDROT64ri: return expandSHXDROT(MIB, get(X86::SHLD64rri8));
case X86::SHRDROT32ri: return expandSHXDROT(MIB, get(X86::SHRD32rri8));
case X86::SHRDROT64ri: return expandSHXDROT(MIB, get(X86::SHRD64rri8));
case X86::ADD8rr_DB:    MIB->setDesc(get(X86::OR8rr));    break;
case X86::ADD16rr_DB:   MIB->setDesc(get(X86::OR16rr));   break;
case X86::ADD32rr_DB:   MIB->setDesc(get(X86::OR32rr));   break;
case X86::ADD64rr_DB:   MIB->setDesc(get(X86::OR64rr));   break;
case X86::ADD8ri_DB:    MIB->setDesc(get(X86::OR8ri));    break;
case X86::ADD16ri_DB:   MIB->setDesc(get(X86::OR16ri));   break;
case X86::ADD32ri_DB:   MIB->setDesc(get(X86::OR32ri));   break;
case X86::ADD64ri32_DB: MIB->setDesc(get(X86::OR64ri32)); break;
case X86::ADD16ri8_DB:  MIB->setDesc(get(X86::OR16ri8));  break;
case X86::ADD32ri8_DB:  MIB->setDesc(get(X86::OR32ri8));  break;
case X86::ADD64ri8_DB:  MIB->setDesc(get(X86::OR64ri8));  break;
}
return false;
4898}

4900/// Return true for all instructions that only update
4901/// the first 32 or 64-bits of the destination register and leave the rest
4902/// unmodified. This can be used to avoid folding loads if the instructions
4903/// only update part of the destination register, and the non-updated part is
4904/// not needed. e.g. cvtss2sd, sqrtss. Unfolding the load from these
4905/// instructions breaks the partial register dependency and it can improve
4906/// performance. e.g.:
4907///
4908///   movss (%rdi), %xmm0
4909///   cvtss2sd %xmm0, %xmm0
4910///
4911/// Instead of
4912///   cvtss2sd (%rdi), %xmm0
4913///
4914/// FIXME: This should be turned into a TSFlags.
4915///
4916static bool hasPartialRegUpdate(unsigned Opcode,
                              const X86Subtarget &Subtarget,
                              bool ForLoadFold = false) {
switch (Opcode) {
case X86::CVTSI2SSrr:
case X86::CVTSI2SSrm:
case X86::CVTSI642SSrr:
case X86::CVTSI642SSrm:
case X86::CVTSI2SDrr:
case X86::CVTSI2SDrm:
case X86::CVTSI642SDrr:
case X86::CVTSI642SDrm:
  // Load folding won't effect the undef register update since the input is
  // a GPR.
  return !ForLoadFold;
case X86::CVTSD2SSrr:
case X86::CVTSD2SSrm:
case X86::CVTSS2SDrr:
case X86::CVTSS2SDrm:
case X86::MOVHPDrm:
case X86::MOVHPSrm:
case X86::MOVLPDrm:
case X86::MOVLPSrm:
case X86::RCPSSr:
case X86::RCPSSm:
case X86::RCPSSr_Int:
case X86::RCPSSm_Int:
case X86::ROUNDSDr:
case X86::ROUNDSDm:
case X86::ROUNDSSr:
case X86::ROUNDSSm:
case X86::RSQRTSSr:
case X86::RSQRTSSm:
case X86::RSQRTSSr_Int:
case X86::RSQRTSSm_Int:
case X86::SQRTSSr:
case X86::SQRTSSm:
case X86::SQRTSSr_Int:
case X86::SQRTSSm_Int:
case X86::SQRTSDr:
case X86::SQRTSDm:
case X86::SQRTSDr_Int:
case X86::SQRTSDm_Int:
  return true;
// GPR
case X86::POPCNT32rm:
case X86::POPCNT32rr:
case X86::POPCNT64rm:
case X86::POPCNT64rr:
  return Subtarget.hasPOPCNTFalseDeps();
case X86::LZCNT32rm:
case X86::LZCNT32rr:
case X86::LZCNT64rm:
case X86::LZCNT64rr:
case X86::TZCNT32rm:
case X86::TZCNT32rr:
case X86::TZCNT64rm:
case X86::TZCNT64rr:
  return Subtarget.hasLZCNTFalseDeps();
}

return false;
4978}

4980/// Inform the BreakFalseDeps pass how many idle
4981/// instructions we would like before a partial register update.
4982unsigned X86InstrInfo::getPartialRegUpdateClearance(
  const MachineInstr &MI, unsigned OpNum,
  const TargetRegisterInfo *TRI) const {
if (OpNum != 0 || !hasPartialRegUpdate(MI.getOpcode(), Subtarget))
  return 0;

// If MI is marked as reading Reg, the partial register update is wanted.
const MachineOperand &MO = MI.getOperand(0);
Register Reg = MO.getReg();
if (Reg.isVirtual()) {
  if (MO.readsReg() || MI.readsVirtualRegister(Reg))
    return 0;
} else {
  if (MI.readsRegister(Reg, TRI))
    return 0;
}

// If any instructions in the clearance range are reading Reg, insert a
// dependency breaking instruction, which is inexpensive and is likely to
// be hidden in other instruction's cycles.
return PartialRegUpdateClearance;
5003}

5005// Return true for any instruction the copies the high bits of the first source
5006// operand into the unused high bits of the destination operand.
5007// Also returns true for instructions that have two inputs where one may
5008// be undef and we want it to use the same register as the other input.
5009static bool hasUndefRegUpdate(unsigned Opcode, unsigned OpNum,
                            bool ForLoadFold = false) {
// Set the OpNum parameter to the first source operand.
switch (Opcode) {
case X86::MMX_PUNPCKHBWirr:
case X86::MMX_PUNPCKHWDirr:
case X86::MMX_PUNPCKHDQirr:
case X86::MMX_PUNPCKLBWirr:
case X86::MMX_PUNPCKLWDirr:
case X86::MMX_PUNPCKLDQirr:
case X86::MOVHLPSrr:
case X86::PACKSSWBrr:
case X86::PACKUSWBrr:
case X86::PACKSSDWrr:
case X86::PACKUSDWrr:
case X86::PUNPCKHBWrr:
case X86::PUNPCKLBWrr:
case X86::PUNPCKHWDrr:
case X86::PUNPCKLWDrr:
case X86::PUNPCKHDQrr:
case X86::PUNPCKLDQrr:
case X86::PUNPCKHQDQrr:
case X86::PUNPCKLQDQrr:
case X86::SHUFPDrri:
case X86::SHUFPSrri:
  // These instructions are sometimes used with an undef first or second
  // source. Return true here so BreakFalseDeps will assign this source to the
  // same register as the first source to avoid a false dependency.
  // Operand 1 of these instructions is tied so they're separate from their
  // VEX counterparts.
  return OpNum == 2 && !ForLoadFold;

case X86::VMOVLHPSrr:
case X86::VMOVLHPSZrr:
case X86::VPACKSSWBrr:
case X86::VPACKUSWBrr:
case X86::VPACKSSDWrr:
case X86::VPACKUSDWrr:
case X86::VPACKSSWBZ128rr:
case X86::VPACKUSWBZ128rr:
case X86::VPACKSSDWZ128rr:
case X86::VPACKUSDWZ128rr:
case X86::VPERM2F128rr:
case X86::VPERM2I128rr:
case X86::VSHUFF32X4Z256rri:
case X86::VSHUFF32X4Zrri:
case X86::VSHUFF64X2Z256rri:
case X86::VSHUFF64X2Zrri:
case X86::VSHUFI32X4Z256rri:
case X86::VSHUFI32X4Zrri:
case X86::VSHUFI64X2Z256rri:
case X86::VSHUFI64X2Zrri:
case X86::VPUNPCKHBWrr:
case X86::VPUNPCKLBWrr:
case X86::VPUNPCKHBWYrr:
case X86::VPUNPCKLBWYrr:
case X86::VPUNPCKHBWZ128rr:
case X86::VPUNPCKLBWZ128rr:
case X86::VPUNPCKHBWZ256rr:
case X86::VPUNPCKLBWZ256rr:
case X86::VPUNPCKHBWZrr:
case X86::VPUNPCKLBWZrr:
case X86::VPUNPCKHWDrr:
case X86::VPUNPCKLWDrr:
case X86::VPUNPCKHWDYrr:
case X86::VPUNPCKLWDYrr:
case X86::VPUNPCKHWDZ128rr:
case X86::VPUNPCKLWDZ128rr:
case X86::VPUNPCKHWDZ256rr:
case X86::VPUNPCKLWDZ256rr:
case X86::VPUNPCKHWDZrr:
case X86::VPUNPCKLWDZrr:
case X86::VPUNPCKHDQrr:
case X86::VPUNPCKLDQrr:
case X86::VPUNPCKHDQYrr:
case X86::VPUNPCKLDQYrr:
case X86::VPUNPCKHDQZ128rr:
case X86::VPUNPCKLDQZ128rr:
case X86::VPUNPCKHDQZ256rr:
case X86::VPUNPCKLDQZ256rr:
case X86::VPUNPCKHDQZrr:
case X86::VPUNPCKLDQZrr:
case X86::VPUNPCKHQDQrr:
case X86::VPUNPCKLQDQrr:
case X86::VPUNPCKHQDQYrr:
case X86::VPUNPCKLQDQYrr:
case X86::VPUNPCKHQDQZ128rr:
case X86::VPUNPCKLQDQZ128rr:
case X86::VPUNPCKHQDQZ256rr:
case X86::VPUNPCKLQDQZ256rr:
case X86::VPUNPCKHQDQZrr:
case X86::VPUNPCKLQDQZrr:
  // These instructions are sometimes used with an undef first or second
  // source. Return true here so BreakFalseDeps will assign this source to the
  // same register as the first source to avoid a false dependency.
  return (OpNum == 1 || OpNum == 2) && !ForLoadFold;

case X86::VCVTSI2SSrr:
case X86::VCVTSI2SSrm:
case X86::VCVTSI2SSrr_Int:
case X86::VCVTSI2SSrm_Int:
case X86::VCVTSI642SSrr:
case X86::VCVTSI642SSrm:
case X86::VCVTSI642SSrr_Int:
case X86::VCVTSI642SSrm_Int:
case X86::VCVTSI2SDrr:
case X86::VCVTSI2SDrm:
case X86::VCVTSI2SDrr_Int:
case X86::VCVTSI2SDrm_Int:
case X86::VCVTSI642SDrr:
case X86::VCVTSI642SDrm:
case X86::VCVTSI642SDrr_Int:
case X86::VCVTSI642SDrm_Int:
// AVX-512
case X86::VCVTSI2SSZrr:
case X86::VCVTSI2SSZrm:
case X86::VCVTSI2SSZrr_Int:
case X86::VCVTSI2SSZrrb_Int:
case X86::VCVTSI2SSZrm_Int:
case X86::VCVTSI642SSZrr:
case X86::VCVTSI642SSZrm:
case X86::VCVTSI642SSZrr_Int:
case X86::VCVTSI642SSZrrb_Int:
case X86::VCVTSI642SSZrm_Int:
case X86::VCVTSI2SDZrr:
case X86::VCVTSI2SDZrm:
case X86::VCVTSI2SDZrr_Int:
case X86::VCVTSI2SDZrm_Int:
case X86::VCVTSI642SDZrr:
case X86::VCVTSI642SDZrm:
case X86::VCVTSI642SDZrr_Int:
case X86::VCVTSI642SDZrrb_Int:
case X86::VCVTSI642SDZrm_Int:
case X86::VCVTUSI2SSZrr:
case X86::VCVTUSI2SSZrm:
case X86::VCVTUSI2SSZrr_Int:
case X86::VCVTUSI2SSZrrb_Int:
case X86::VCVTUSI2SSZrm_Int:
case X86::VCVTUSI642SSZrr:
case X86::VCVTUSI642SSZrm:
case X86::VCVTUSI642SSZrr_Int:
case X86::VCVTUSI642SSZrrb_Int:
case X86::VCVTUSI642SSZrm_Int:
case X86::VCVTUSI2SDZrr:
case X86::VCVTUSI2SDZrm:
case X86::VCVTUSI2SDZrr_Int:
case X86::VCVTUSI2SDZrm_Int:
case X86::VCVTUSI642SDZrr:
case X86::VCVTUSI642SDZrm:
case X86::VCVTUSI642SDZrr_Int:
case X86::VCVTUSI642SDZrrb_Int:
case X86::VCVTUSI642SDZrm_Int:
  // Load folding won't effect the undef register update since the input is
  // a GPR.
  return OpNum == 1 && !ForLoadFold;
case X86::VCVTSD2SSrr:
case X86::VCVTSD2SSrm:
case X86::VCVTSD2SSrr_Int:
case X86::VCVTSD2SSrm_Int:
case X86::VCVTSS2SDrr:
case X86::VCVTSS2SDrm:
case X86::VCVTSS2SDrr_Int:
case X86::VCVTSS2SDrm_Int:
case X86::VRCPSSr:
case X86::VRCPSSr_Int:
case X86::VRCPSSm:
case X86::VRCPSSm_Int:
case X86::VROUNDSDr:
case X86::VROUNDSDm:
case X86::VROUNDSDr_Int:
case X86::VROUNDSDm_Int:
case X86::VROUNDSSr:
case X86::VROUNDSSm:
case X86::VROUNDSSr_Int:
case X86::VROUNDSSm_Int:
case X86::VRSQRTSSr:
case X86::VRSQRTSSr_Int:
case X86::VRSQRTSSm:
case X86::VRSQRTSSm_Int:
case X86::VSQRTSSr:
case X86::VSQRTSSr_Int:
case X86::VSQRTSSm:
case X86::VSQRTSSm_Int:
case X86::VSQRTSDr:
case X86::VSQRTSDr_Int:
case X86::VSQRTSDm:
case X86::VSQRTSDm_Int:
// AVX-512
case X86::VCVTSD2SSZrr:
case X86::VCVTSD2SSZrr_Int:
case X86::VCVTSD2SSZrrb_Int:
case X86::VCVTSD2SSZrm:
case X86::VCVTSD2SSZrm_Int:
case X86::VCVTSS2SDZrr:
case X86::VCVTSS2SDZrr_Int:
case X86::VCVTSS2SDZrrb_Int:
case X86::VCVTSS2SDZrm:
case X86::VCVTSS2SDZrm_Int:
case X86::VGETEXPSDZr:
case X86::VGETEXPSDZrb:
case X86::VGETEXPSDZm:
case X86::VGETEXPSSZr:
case X86::VGETEXPSSZrb:
case X86::VGETEXPSSZm:
case X86::VGETMANTSDZrri:
case X86::VGETMANTSDZrrib:
case X86::VGETMANTSDZrmi:
case X86::VGETMANTSSZrri:
case X86::VGETMANTSSZrrib:
case X86::VGETMANTSSZrmi:
case X86::VRNDSCALESDZr:
case X86::VRNDSCALESDZr_Int:
case X86::VRNDSCALESDZrb_Int:
case X86::VRNDSCALESDZm:
case X86::VRNDSCALESDZm_Int:
case X86::VRNDSCALESSZr:
case X86::VRNDSCALESSZr_Int:
case X86::VRNDSCALESSZrb_Int:
case X86::VRNDSCALESSZm:
case X86::VRNDSCALESSZm_Int:
case X86::VRCP14SDZrr:
case X86::VRCP14SDZrm:
case X86::VRCP14SSZrr:
case X86::VRCP14SSZrm:
case X86::VRCP28SDZr:
case X86::VRCP28SDZrb:
case X86::VRCP28SDZm:
case X86::VRCP28SSZr:
case X86::VRCP28SSZrb:
case X86::VRCP28SSZm:
case X86::VREDUCESSZrmi:
case X86::VREDUCESSZrri:
case X86::VREDUCESSZrrib:
case X86::VRSQRT14SDZrr:
case X86::VRSQRT14SDZrm:
case X86::VRSQRT14SSZrr:
case X86::VRSQRT14SSZrm:
case X86::VRSQRT28SDZr:
case X86::VRSQRT28SDZrb:
case X86::VRSQRT28SDZm:
case X86::VRSQRT28SSZr:
case X86::VRSQRT28SSZrb:
case X86::VRSQRT28SSZm:
case X86::VSQRTSSZr:
case X86::VSQRTSSZr_Int:
case X86::VSQRTSSZrb_Int:
case X86::VSQRTSSZm:
case X86::VSQRTSSZm_Int:
case X86::VSQRTSDZr:
case X86::VSQRTSDZr_Int:
case X86::VSQRTSDZrb_Int:
case X86::VSQRTSDZm:
case X86::VSQRTSDZm_Int:
  return OpNum == 1;
case X86::VMOVSSZrrk:
case X86::VMOVSDZrrk:
  return OpNum == 3 && !ForLoadFold;
case X86::VMOVSSZrrkz:
case X86::VMOVSDZrrkz:
  return OpNum == 2 && !ForLoadFold;
}

return false;
5272}

5274/// Inform the BreakFalseDeps pass how many idle instructions we would like
5275/// before certain undef register reads.
5276///
5277/// This catches the VCVTSI2SD family of instructions:
5278///
5279/// vcvtsi2sdq %rax, undef %xmm0, %xmm14
5280///
5281/// We should to be careful *not* to catch VXOR idioms which are presumably
5282/// handled specially in the pipeline:
5283///
5284/// vxorps undef %xmm1, undef %xmm1, %xmm1
5285///
5286/// Like getPartialRegUpdateClearance, this makes a strong assumption that the
5287/// high bits that are passed-through are not live.
5288unsigned
5289X86InstrInfo::getUndefRegClearance(const MachineInstr &MI, unsigned OpNum,
                                 const TargetRegisterInfo *TRI) const {
const MachineOperand &MO = MI.getOperand(OpNum);
if (Register::isPhysicalRegister(MO.getReg()) &&
    hasUndefRegUpdate(MI.getOpcode(), OpNum))
  return UndefRegClearance;

return 0;
5297}

5299void X86InstrInfo::breakPartialRegDependency(
  MachineInstr &MI, unsigned OpNum, const TargetRegisterInfo *TRI) const {
Register Reg = MI.getOperand(OpNum).getReg();
// If MI kills this register, the false dependence is already broken.
if (MI.killsRegister(Reg, TRI))
  return;

if (X86::VR128RegClass.contains(Reg)) {
  // These instructions are all floating point domain, so xorps is the best
  // choice.
  unsigned Opc = Subtarget.hasAVX() ? X86::VXORPSrr : X86::XORPSrr;
  BuildMI(*MI.getParent(), MI, MI.getDebugLoc(), get(Opc), Reg)
      .addReg(Reg, RegState::Undef)
      .addReg(Reg, RegState::Undef);
  MI.addRegisterKilled(Reg, TRI, true);
} else if (X86::VR256RegClass.contains(Reg)) {
  // Use vxorps to clear the full ymm register.
  // It wants to read and write the xmm sub-register.
  Register XReg = TRI->getSubReg(Reg, X86::sub_xmm);
  BuildMI(*MI.getParent(), MI, MI.getDebugLoc(), get(X86::VXORPSrr), XReg)
      .addReg(XReg, RegState::Undef)
      .addReg(XReg, RegState::Undef)
      .addReg(Reg, RegState::ImplicitDefine);
  MI.addRegisterKilled(Reg, TRI, true);
} else if (X86::GR64RegClass.contains(Reg)) {
  // Using XOR32rr because it has shorter encoding and zeros up the upper bits
  // as well.
  Register XReg = TRI->getSubReg(Reg, X86::sub_32bit);
  BuildMI(*MI.getParent(), MI, MI.getDebugLoc(), get(X86::XOR32rr), XReg)
      .addReg(XReg, RegState::Undef)
      .addReg(XReg, RegState::Undef)
      .addReg(Reg, RegState::ImplicitDefine);
  MI.addRegisterKilled(Reg, TRI, true);
} else if (X86::GR32RegClass.contains(Reg)) {
  BuildMI(*MI.getParent(), MI, MI.getDebugLoc(), get(X86::XOR32rr), Reg)
      .addReg(Reg, RegState::Undef)
      .addReg(Reg, RegState::Undef);
  MI.addRegisterKilled(Reg, TRI, true);
}
5338}

5340static void addOperands(MachineInstrBuilder &MIB, ArrayRef<MachineOperand> MOs,
                      int PtrOffset = 0) {
unsigned NumAddrOps = MOs.size();

if (NumAddrOps < 4) {
  // FrameIndex only - add an immediate offset (whether its zero or not).
  for (unsigned i = 0; i != NumAddrOps; ++i)
    MIB.add(MOs[i]);
  addOffset(MIB, PtrOffset);
} else {
  // General Memory Addressing - we need to add any offset to an existing
  // offset.
  assert(MOs.size() == 5 && "Unexpected memory operand list length")((void)0);
  for (unsigned i = 0; i != NumAddrOps; ++i) {
    const MachineOperand &MO = MOs[i];
    if (i == 3 && PtrOffset != 0) {
      MIB.addDisp(MO, PtrOffset);
    } else {
      MIB.add(MO);
    }
  }
}
5362}

5364static void updateOperandRegConstraints(MachineFunction &MF,
                                      MachineInstr &NewMI,
                                      const TargetInstrInfo &TII) {
MachineRegisterInfo &MRI = MF.getRegInfo();
const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();

for (int Idx : llvm::seq<int>(0, NewMI.getNumOperands())) {
  MachineOperand &MO = NewMI.getOperand(Idx);
  // We only need to update constraints on virtual register operands.
  if (!MO.isReg())
    continue;
  Register Reg = MO.getReg();
  if (!Reg.isVirtual())
    continue;

  auto *NewRC = MRI.constrainRegClass(
      Reg, TII.getRegClass(NewMI.getDesc(), Idx, &TRI, MF));
  if (!NewRC) {
    LLVM_DEBUG(do { } while (false)
        dbgs() << "WARNING: Unable to update register constraint for operand "do { } while (false)
               << Idx << " of instruction:\n";do { } while (false)
        NewMI.dump(); dbgs() << "\n")do { } while (false);
  }
}
5388}

5390static MachineInstr *FuseTwoAddrInst(MachineFunction &MF, unsigned Opcode,
                                   ArrayRef<MachineOperand> MOs,
                                   MachineBasicBlock::iterator InsertPt,
                                   MachineInstr &MI,
                                   const TargetInstrInfo &TII) {
// Create the base instruction with the memory operand as the first part.
// Omit the implicit operands, something BuildMI can't do.
MachineInstr *NewMI =
    MF.CreateMachineInstr(TII.get(Opcode), MI.getDebugLoc(), true);
MachineInstrBuilder MIB(MF, NewMI);
addOperands(MIB, MOs);

// Loop over the rest of the ri operands, converting them over.
unsigned NumOps = MI.getDesc().getNumOperands() - 2;
for (unsigned i = 0; i != NumOps; ++i) {
  MachineOperand &MO = MI.getOperand(i + 2);
  MIB.add(MO);
}
for (unsigned i = NumOps + 2, e = MI.getNumOperands(); i != e; ++i) {
  MachineOperand &MO = MI.getOperand(i);
  MIB.add(MO);
}

updateOperandRegConstraints(MF, *NewMI, TII);

MachineBasicBlock *MBB = InsertPt->getParent();
MBB->insert(InsertPt, NewMI);

return MIB;
5419}

5421static MachineInstr *FuseInst(MachineFunction &MF, unsigned Opcode,
                            unsigned OpNo, ArrayRef<MachineOperand> MOs,
                            MachineBasicBlock::iterator InsertPt,
                            MachineInstr &MI, const TargetInstrInfo &TII,
                            int PtrOffset = 0) {
// Omit the implicit operands, something BuildMI can't do.
MachineInstr *NewMI =
    MF.CreateMachineInstr(TII.get(Opcode), MI.getDebugLoc(), true);
MachineInstrBuilder MIB(MF, NewMI);

for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
  MachineOperand &MO = MI.getOperand(i);
  if (i == OpNo) {
    assert(MO.isReg() && "Expected to fold into reg operand!")((void)0);
    addOperands(MIB, MOs, PtrOffset);
  } else {
    MIB.add(MO);
  }
}

updateOperandRegConstraints(MF, *NewMI, TII);

// Copy the NoFPExcept flag from the instruction we're fusing.
if (MI.getFlag(MachineInstr::MIFlag::NoFPExcept))
  NewMI->setFlag(MachineInstr::MIFlag::NoFPExcept);

MachineBasicBlock *MBB = InsertPt->getParent();
MBB->insert(InsertPt, NewMI);

return MIB;
5451}

5453static MachineInstr *MakeM0Inst(const TargetInstrInfo &TII, unsigned Opcode,
                              ArrayRef<MachineOperand> MOs,
                              MachineBasicBlock::iterator InsertPt,
                              MachineInstr &MI) {
MachineInstrBuilder MIB = BuildMI(*InsertPt->getParent(), InsertPt,
                                  MI.getDebugLoc(), TII.get(Opcode));
addOperands(MIB, MOs);
return MIB.addImm(0);
5461}

5463MachineInstr *X86InstrInfo::foldMemoryOperandCustom(
  MachineFunction &MF, MachineInstr &MI, unsigned OpNum,
  ArrayRef<MachineOperand> MOs, MachineBasicBlock::iterator InsertPt,
  unsigned Size, Align Alignment) const {
switch (MI.getOpcode()) {
case X86::INSERTPSrr:
case X86::VINSERTPSrr:
case X86::VINSERTPSZrr:
  // Attempt to convert the load of inserted vector into a fold load
  // of a single float.
  if (OpNum == 2) {
    unsigned Imm = MI.getOperand(MI.getNumOperands() - 1).getImm();
    unsigned ZMask = Imm & 15;
    unsigned DstIdx = (Imm >> 4) & 3;
    unsigned SrcIdx = (Imm >> 6) & 3;

    const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
    const TargetRegisterClass *RC = getRegClass(MI.getDesc(), OpNum, &RI, MF);
    unsigned RCSize = TRI.getRegSizeInBits(*RC) / 8;
    if ((Size == 0 || Size >= 16) && RCSize >= 16 && Alignment >= Align(4)) {
      int PtrOffset = SrcIdx * 4;
      unsigned NewImm = (DstIdx << 4) | ZMask;
      unsigned NewOpCode =
          (MI.getOpcode() == X86::VINSERTPSZrr) ? X86::VINSERTPSZrm :
          (MI.getOpcode() == X86::VINSERTPSrr)  ? X86::VINSERTPSrm  :
                                                  X86::INSERTPSrm;
      MachineInstr *NewMI =
          FuseInst(MF, NewOpCode, OpNum, MOs, InsertPt, MI, *this, PtrOffset);
      NewMI->getOperand(NewMI->getNumOperands() - 1).setImm(NewImm);
      return NewMI;
    }
  }
  break;
case X86::MOVHLPSrr:
case X86::VMOVHLPSrr:
case X86::VMOVHLPSZrr:
  // Move the upper 64-bits of the second operand to the lower 64-bits.
  // To fold the load, adjust the pointer to the upper and use (V)MOVLPS.
  // TODO: In most cases AVX doesn't have a 8-byte alignment requirement.
  if (OpNum == 2) {
    const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
    const TargetRegisterClass *RC = getRegClass(MI.getDesc(), OpNum, &RI, MF);
    unsigned RCSize = TRI.getRegSizeInBits(*RC) / 8;
    if ((Size == 0 || Size >= 16) && RCSize >= 16 && Alignment >= Align(8)) {
      unsigned NewOpCode =
          (MI.getOpcode() == X86::VMOVHLPSZrr) ? X86::VMOVLPSZ128rm :
          (MI.getOpcode() == X86::VMOVHLPSrr)  ? X86::VMOVLPSrm     :
                                                 X86::MOVLPSrm;
      MachineInstr *NewMI =
          FuseInst(MF, NewOpCode, OpNum, MOs, InsertPt, MI, *this, 8);
      return NewMI;
    }
  }
  break;
case X86::UNPCKLPDrr:
  // If we won't be able to fold this to the memory form of UNPCKL, use
  // MOVHPD instead. Done as custom because we can't have this in the load
  // table twice.
  if (OpNum == 2) {
    const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
    const TargetRegisterClass *RC = getRegClass(MI.getDesc(), OpNum, &RI, MF);
    unsigned RCSize = TRI.getRegSizeInBits(*RC) / 8;
    if ((Size == 0 || Size >= 16) && RCSize >= 16 && Alignment < Align(16)) {
      MachineInstr *NewMI =
          FuseInst(MF, X86::MOVHPDrm, OpNum, MOs, InsertPt, MI, *this);
      return NewMI;
    }
  }
  break;
}

return nullptr;
5535}

5537static bool shouldPreventUndefRegUpdateMemFold(MachineFunction &MF,
                                             MachineInstr &MI) {
if (!hasUndefRegUpdate(MI.getOpcode(), 1, /*ForLoadFold*/true) ||
    !MI.getOperand(1).isReg())
  return false;

// The are two cases we need to handle depending on where in the pipeline
// the folding attempt is being made.
// -Register has the undef flag set.
// -Register is produced by the IMPLICIT_DEF instruction.

if (MI.getOperand(1).isUndef())
  return true;

MachineRegisterInfo &RegInfo = MF.getRegInfo();
MachineInstr *VRegDef = RegInfo.getUniqueVRegDef(MI.getOperand(1).getReg());
return VRegDef && VRegDef->isImplicitDef();
5554}

5556MachineInstr *X86InstrInfo::foldMemoryOperandImpl(
  MachineFunction &MF, MachineInstr &MI, unsigned OpNum,
  ArrayRef<MachineOperand> MOs, MachineBasicBlock::iterator InsertPt,
  unsigned Size, Align Alignment, bool AllowCommute) const {
bool isSlowTwoMemOps = Subtarget.slowTwoMemOps();
bool isTwoAddrFold = false;

// For CPUs that favor the register form of a call or push,
// do not fold loads into calls or pushes, unless optimizing for size
// aggressively.
if (isSlowTwoMemOps && !MF.getFunction().hasMinSize() &&
    (MI.getOpcode() == X86::CALL32r || MI.getOpcode() == X86::CALL64r ||
     MI.getOpcode() == X86::PUSH16r || MI.getOpcode() == X86::PUSH32r ||
     MI.getOpcode() == X86::PUSH64r))
  return nullptr;

// Avoid partial and undef register update stalls unless optimizing for size.
if (!MF.getFunction().hasOptSize() &&
    (hasPartialRegUpdate(MI.getOpcode(), Subtarget, /*ForLoadFold*/true) ||
     shouldPreventUndefRegUpdateMemFold(MF, MI)))
  return nullptr;

unsigned NumOps = MI.getDesc().getNumOperands();
bool isTwoAddr =
    NumOps > 1 && MI.getDesc().getOperandConstraint(1, MCOI::TIED_TO) != -1;

// FIXME: AsmPrinter doesn't know how to handle
// X86II::MO_GOT_ABSOLUTE_ADDRESS after folding.
if (MI.getOpcode() == X86::ADD32ri &&
    MI.getOperand(2).getTargetFlags() == X86II::MO_GOT_ABSOLUTE_ADDRESS)
  return nullptr;

// GOTTPOFF relocation loads can only be folded into add instructions.
// FIXME: Need to exclude other relocations that only support specific
// instructions.
if (MOs.size() == X86::AddrNumOperands &&
    MOs[X86::AddrDisp].getTargetFlags() == X86II::MO_GOTTPOFF &&
    MI.getOpcode() != X86::ADD64rr)
  return nullptr;

MachineInstr *NewMI = nullptr;

// Attempt to fold any custom cases we have.
if (MachineInstr *CustomMI = foldMemoryOperandCustom(
        MF, MI, OpNum, MOs, InsertPt, Size, Alignment))
  return CustomMI;

const X86MemoryFoldTableEntry *I = nullptr;

// Folding a memory location into the two-address part of a two-address
// instruction is different than folding it other places.  It requires
// replacing the *two* registers with the memory location.
if (isTwoAddr && NumOps >= 2 && OpNum < 2 && MI.getOperand(0).isReg() &&
    MI.getOperand(1).isReg() &&
    MI.getOperand(0).getReg() == MI.getOperand(1).getReg()) {
  I = lookupTwoAddrFoldTable(MI.getOpcode());
  isTwoAddrFold = true;
} else {
  if (OpNum == 0) {
    if (MI.getOpcode() == X86::MOV32r0) {
      NewMI = MakeM0Inst(*this, X86::MOV32mi, MOs, InsertPt, MI);
      if (NewMI)
        return NewMI;
    }
  }

  I = lookupFoldTable(MI.getOpcode(), OpNum);
}

if (I != nullptr) {
  unsigned Opcode = I->DstOp;
  bool FoldedLoad =
      isTwoAddrFold || (OpNum == 0 && I->Flags & TB_FOLDED_LOAD) || OpNum > 0;
  bool FoldedStore =
      isTwoAddrFold || (OpNum == 0 && I->Flags & TB_FOLDED_STORE);
  MaybeAlign MinAlign =
      decodeMaybeAlign((I->Flags & TB_ALIGN_MASK) >> TB_ALIGN_SHIFT);
  if (MinAlign && Alignment < *MinAlign)
    return nullptr;
  bool NarrowToMOV32rm = false;
  if (Size) {
    const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
    const TargetRegisterClass *RC = getRegClass(MI.getDesc(), OpNum,
                                                &RI, MF);
    unsigned RCSize = TRI.getRegSizeInBits(*RC) / 8;
    // Check if it's safe to fold the load. If the size of the object is
    // narrower than the load width, then it's not.
    // FIXME: Allow scalar intrinsic instructions like ADDSSrm_Int.
    if (FoldedLoad && Size < RCSize) {
      // If this is a 64-bit load, but the spill slot is 32, then we can do
      // a 32-bit load which is implicitly zero-extended. This likely is
      // due to live interval analysis remat'ing a load from stack slot.
      if (Opcode != X86::MOV64rm || RCSize != 8 || Size != 4)
        return nullptr;
      if (MI.getOperand(0).getSubReg() || MI.getOperand(1).getSubReg())
        return nullptr;
      Opcode = X86::MOV32rm;
      NarrowToMOV32rm = true;
    }
    // For stores, make sure the size of the object is equal to the size of
    // the store. If the object is larger, the extra bits would be garbage. If
    // the object is smaller we might overwrite another object or fault.
    if (FoldedStore && Size != RCSize)
      return nullptr;
  }

  if (isTwoAddrFold)
    NewMI = FuseTwoAddrInst(MF, Opcode, MOs, InsertPt, MI, *this);
  else
    NewMI = FuseInst(MF, Opcode, OpNum, MOs, InsertPt, MI, *this);

  if (NarrowToMOV32rm) {
    // If this is the special case where we use a MOV32rm to load a 32-bit
    // value and zero-extend the top bits. Change the destination register
    // to a 32-bit one.
    Register DstReg = NewMI->getOperand(0).getReg();
    if (DstReg.isPhysical())
      NewMI->getOperand(0).setReg(RI.getSubReg(DstReg, X86::sub_32bit));
    else
      NewMI->getOperand(0).setSubReg(X86::sub_32bit);
  }
  return NewMI;
}

// If the instruction and target operand are commutable, commute the
// instruction and try again.
if (AllowCommute) {
  unsigned CommuteOpIdx1 = OpNum, CommuteOpIdx2 = CommuteAnyOperandIndex;
  if (findCommutedOpIndices(MI, CommuteOpIdx1, CommuteOpIdx2)) {
    bool HasDef = MI.getDesc().getNumDefs();
    Register Reg0 = HasDef ? MI.getOperand(0).getReg() : Register();
    Register Reg1 = MI.getOperand(CommuteOpIdx1).getReg();
    Register Reg2 = MI.getOperand(CommuteOpIdx2).getReg();
    bool Tied1 =
        0 == MI.getDesc().getOperandConstraint(CommuteOpIdx1, MCOI::TIED_TO);
    bool Tied2 =
        0 == MI.getDesc().getOperandConstraint(CommuteOpIdx2, MCOI::TIED_TO);

    // If either of the commutable operands are tied to the destination
    // then we can not commute + fold.
    if ((HasDef && Reg0 == Reg1 && Tied1) ||
        (HasDef && Reg0 == Reg2 && Tied2))
      return nullptr;

    MachineInstr *CommutedMI =
        commuteInstruction(MI, false, CommuteOpIdx1, CommuteOpIdx2);
    if (!CommutedMI) {
      // Unable to commute.
      return nullptr;
    }
    if (CommutedMI != &MI) {
      // New instruction. We can't fold from this.
      CommutedMI->eraseFromParent();
      return nullptr;
    }

    // Attempt to fold with the commuted version of the instruction.
    NewMI = foldMemoryOperandImpl(MF, MI, CommuteOpIdx2, MOs, InsertPt, Size,
                                  Alignment, /*AllowCommute=*/false);
    if (NewMI)
      return NewMI;

    // Folding failed again - undo the commute before returning.
    MachineInstr *UncommutedMI =
        commuteInstruction(MI, false, CommuteOpIdx1, CommuteOpIdx2);
    if (!UncommutedMI) {
      // Unable to commute.
      return nullptr;
    }
    if (UncommutedMI != &MI) {
      // New instruction. It doesn't need to be kept.
      UncommutedMI->eraseFromParent();
      return nullptr;
    }

    // Return here to prevent duplicate fuse failure report.
    return nullptr;
  }
}

// No fusion
if (PrintFailedFusing && !MI.isCopy())
  dbgs() << "We failed to fuse operand " << OpNum << " in " << MI;
return nullptr;
5740}

5742MachineInstr *
5743X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF, MachineInstr &MI,
                                  ArrayRef<unsigned> Ops,
                                  MachineBasicBlock::iterator InsertPt,
                                  int FrameIndex, LiveIntervals *LIS,
                                  VirtRegMap *VRM) const {
// Check switch flag
if (NoFusing)
  return nullptr;

// Avoid partial and undef register update stalls unless optimizing for size.
if (!MF.getFunction().hasOptSize() &&
    (hasPartialRegUpdate(MI.getOpcode(), Subtarget, /*ForLoadFold*/true) ||
     shouldPreventUndefRegUpdateMemFold(MF, MI)))
  return nullptr;

// Don't fold subreg spills, or reloads that use a high subreg.
for (auto Op : Ops) {
  MachineOperand &MO = MI.getOperand(Op);
  auto SubReg = MO.getSubReg();
  if (SubReg && (MO.isDef() || SubReg == X86::sub_8bit_hi))
    return nullptr;
}

const MachineFrameInfo &MFI = MF.getFrameInfo();
unsigned Size = MFI.getObjectSize(FrameIndex);
Align Alignment = MFI.getObjectAlign(FrameIndex);
// If the function stack isn't realigned we don't want to fold instructions
// that need increased alignment.
if (!RI.hasStackRealignment(MF))
  Alignment =
      std::min(Alignment, Subtarget.getFrameLowering()->getStackAlign());
if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
  unsigned NewOpc = 0;
  unsigned RCSize = 0;
  switch (MI.getOpcode()) {
  default: return nullptr;
  case X86::TEST8rr:  NewOpc = X86::CMP8ri; RCSize = 1; break;
  case X86::TEST16rr: NewOpc = X86::CMP16ri8; RCSize = 2; break;
  case X86::TEST32rr: NewOpc = X86::CMP32ri8; RCSize = 4; break;
  case X86::TEST64rr: NewOpc = X86::CMP64ri8; RCSize = 8; break;
  }
  // Check if it's safe to fold the load. If the size of the object is
  // narrower than the load width, then it's not.
  if (Size < RCSize)
    return nullptr;
  // Change to CMPXXri r, 0 first.
  MI.setDesc(get(NewOpc));
  MI.getOperand(1).ChangeToImmediate(0);
} else if (Ops.size() != 1)
  return nullptr;

return foldMemoryOperandImpl(MF, MI, Ops[0],
                             MachineOperand::CreateFI(FrameIndex), InsertPt,
                             Size, Alignment, /*AllowCommute=*/true);
5797}

5799/// Check if \p LoadMI is a partial register load that we can't fold into \p MI
5800/// because the latter uses contents that wouldn't be defined in the folded
5801/// version.  For instance, this transformation isn't legal:
5802///   movss (%rdi), %xmm0
5803///   addps %xmm0, %xmm0
5804/// ->
5805///   addps (%rdi), %xmm0
5806///
5807/// But this one is:
5808///   movss (%rdi), %xmm0
5809///   addss %xmm0, %xmm0
5810/// ->
5811///   addss (%rdi), %xmm0
5812///
5813static bool isNonFoldablePartialRegisterLoad(const MachineInstr &LoadMI,
                                           const MachineInstr &UserMI,
                                           const MachineFunction &MF) {
unsigned Opc = LoadMI.getOpcode();
unsigned UserOpc = UserMI.getOpcode();
const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
const TargetRegisterClass *RC =
    MF.getRegInfo().getRegClass(LoadMI.getOperand(0).getReg());
unsigned RegSize = TRI.getRegSizeInBits(*RC);

if ((Opc == X86::MOVSSrm || Opc == X86::VMOVSSrm || Opc == X86::VMOVSSZrm ||
     Opc == X86::MOVSSrm_alt || Opc == X86::VMOVSSrm_alt ||
     Opc == X86::VMOVSSZrm_alt) &&
    RegSize > 32) {
  // These instructions only load 32 bits, we can't fold them if the
  // destination register is wider than 32 bits (4 bytes), and its user
  // instruction isn't scalar (SS).
  switch (UserOpc) {
  case X86::CVTSS2SDrr_Int:
  case X86::VCVTSS2SDrr_Int:
  case X86::VCVTSS2SDZrr_Int:
  case X86::VCVTSS2SDZrr_Intk:
  case X86::VCVTSS2SDZrr_Intkz:
  case X86::CVTSS2SIrr_Int:     case X86::CVTSS2SI64rr_Int:
  case X86::VCVTSS2SIrr_Int:    case X86::VCVTSS2SI64rr_Int:
  case X86::VCVTSS2SIZrr_Int:   case X86::VCVTSS2SI64Zrr_Int:
  case X86::CVTTSS2SIrr_Int:    case X86::CVTTSS2SI64rr_Int:
  case X86::VCVTTSS2SIrr_Int:   case X86::VCVTTSS2SI64rr_Int:
  case X86::VCVTTSS2SIZrr_Int:  case X86::VCVTTSS2SI64Zrr_Int:
  case X86::VCVTSS2USIZrr_Int:  case X86::VCVTSS2USI64Zrr_Int:
  case X86::VCVTTSS2USIZrr_Int: case X86::VCVTTSS2USI64Zrr_Int:
  case X86::RCPSSr_Int:   case X86::VRCPSSr_Int:
  case X86::RSQRTSSr_Int: case X86::VRSQRTSSr_Int:
  case X86::ROUNDSSr_Int: case X86::VROUNDSSr_Int:
  case X86::COMISSrr_Int: case X86::VCOMISSrr_Int: case X86::VCOMISSZrr_Int:
  case X86::UCOMISSrr_Int:case X86::VUCOMISSrr_Int:case X86::VUCOMISSZrr_Int:
  case X86::ADDSSrr_Int: case X86::VADDSSrr_Int: case X86::VADDSSZrr_Int:
  case X86::CMPSSrr_Int: case X86::VCMPSSrr_Int: case X86::VCMPSSZrr_Int:
  case X86::DIVSSrr_Int: case X86::VDIVSSrr_Int: case X86::VDIVSSZrr_Int:
  case X86::MAXSSrr_Int: case X86::VMAXSSrr_Int: case X86::VMAXSSZrr_Int:
  case X86::MINSSrr_Int: case X86::VMINSSrr_Int: case X86::VMINSSZrr_Int:
  case X86::MULSSrr_Int: case X86::VMULSSrr_Int: case X86::VMULSSZrr_Int:
  case X86::SQRTSSr_Int: case X86::VSQRTSSr_Int: case X86::VSQRTSSZr_Int:
  case X86::SUBSSrr_Int: case X86::VSUBSSrr_Int: case X86::VSUBSSZrr_Int:
  case X86::VADDSSZrr_Intk: case X86::VADDSSZrr_Intkz:
  case X86::VCMPSSZrr_Intk:
  case X86::VDIVSSZrr_Intk: case X86::VDIVSSZrr_Intkz:
  case X86::VMAXSSZrr_Intk: case X86::VMAXSSZrr_Intkz:
  case X86::VMINSSZrr_Intk: case X86::VMINSSZrr_Intkz:
  case X86::VMULSSZrr_Intk: case X86::VMULSSZrr_Intkz:
  case X86::VSQRTSSZr_Intk: case X86::VSQRTSSZr_Intkz:
  case X86::VSUBSSZrr_Intk: case X86::VSUBSSZrr_Intkz:
  case X86::VFMADDSS4rr_Int:   case X86::VFNMADDSS4rr_Int:
  case X86::VFMSUBSS4rr_Int:   case X86::VFNMSUBSS4rr_Int:
  case X86::VFMADD132SSr_Int:  case X86::VFNMADD132SSr_Int:
  case X86::VFMADD213SSr_Int:  case X86::VFNMADD213SSr_Int:
  case X86::VFMADD231SSr_Int:  case X86::VFNMADD231SSr_Int:
  case X86::VFMSUB132SSr_Int:  case X86::VFNMSUB132SSr_Int:
  case X86::VFMSUB213SSr_Int:  case X86::VFNMSUB213SSr_Int:
  case X86::VFMSUB231SSr_Int:  case X86::VFNMSUB231SSr_Int:
  case X86::VFMADD132SSZr_Int: case X86::VFNMADD132SSZr_Int:
  case X86::VFMADD213SSZr_Int: case X86::VFNMADD213SSZr_Int:
  case X86::VFMADD231SSZr_Int: case X86::VFNMADD231SSZr_Int:
  case X86::VFMSUB132SSZr_Int: case X86::VFNMSUB132SSZr_Int:
  case X86::VFMSUB213SSZr_Int: case X86::VFNMSUB213SSZr_Int:
  case X86::VFMSUB231SSZr_Int: case X86::VFNMSUB231SSZr_Int:
  case X86::VFMADD132SSZr_Intk: case X86::VFNMADD132SSZr_Intk:
  case X86::VFMADD213SSZr_Intk: case X86::VFNMADD213SSZr_Intk:
  case X86::VFMADD231SSZr_Intk: case X86::VFNMADD231SSZr_Intk:
  case X86::VFMSUB132SSZr_Intk: case X86::VFNMSUB132SSZr_Intk:
  case X86::VFMSUB213SSZr_Intk: case X86::VFNMSUB213SSZr_Intk:
  case X86::VFMSUB231SSZr_Intk: case X86::VFNMSUB231SSZr_Intk:
  case X86::VFMADD132SSZr_Intkz: case X86::VFNMADD132SSZr_Intkz:
  case X86::VFMADD213SSZr_Intkz: case X86::VFNMADD213SSZr_Intkz:
  case X86::VFMADD231SSZr_Intkz: case X86::VFNMADD231SSZr_Intkz:
  case X86::VFMSUB132SSZr_Intkz: case X86::VFNMSUB132SSZr_Intkz:
  case X86::VFMSUB213SSZr_Intkz: case X86::VFNMSUB213SSZr_Intkz:
  case X86::VFMSUB231SSZr_Intkz: case X86::VFNMSUB231SSZr_Intkz:
  case X86::VFIXUPIMMSSZrri:
  case X86::VFIXUPIMMSSZrrik:
  case X86::VFIXUPIMMSSZrrikz:
  case X86::VFPCLASSSSZrr:
  case X86::VFPCLASSSSZrrk:
  case X86::VGETEXPSSZr:
  case X86::VGETEXPSSZrk:
  case X86::VGETEXPSSZrkz:
  case X86::VGETMANTSSZrri:
  case X86::VGETMANTSSZrrik:
  case X86::VGETMANTSSZrrikz:
  case X86::VRANGESSZrri:
  case X86::VRANGESSZrrik:
  case X86::VRANGESSZrrikz:
  case X86::VRCP14SSZrr:
  case X86::VRCP14SSZrrk:
  case X86::VRCP14SSZrrkz:
  case X86::VRCP28SSZr:
  case X86::VRCP28SSZrk:
  case X86::VRCP28SSZrkz:
  case X86::VREDUCESSZrri:
  case X86::VREDUCESSZrrik:
  case X86::VREDUCESSZrrikz:
  case X86::VRNDSCALESSZr_Int:
  case X86::VRNDSCALESSZr_Intk:
  case X86::VRNDSCALESSZr_Intkz:
  case X86::VRSQRT14SSZrr:
  case X86::VRSQRT14SSZrrk:
  case X86::VRSQRT14SSZrrkz:
  case X86::VRSQRT28SSZr:
  case X86::VRSQRT28SSZrk:
  case X86::VRSQRT28SSZrkz:
  case X86::VSCALEFSSZrr:
  case X86::VSCALEFSSZrrk:
  case X86::VSCALEFSSZrrkz:
    return false;
  default:
    return true;
  }
}

if ((Opc == X86::MOVSDrm || Opc == X86::VMOVSDrm || Opc == X86::VMOVSDZrm ||
     Opc == X86::MOVSDrm_alt || Opc == X86::VMOVSDrm_alt ||
     Opc == X86::VMOVSDZrm_alt) &&
    RegSize > 64) {
  // These instructions only load 64 bits, we can't fold them if the
  // destination register is wider than 64 bits (8 bytes), and its user
  // instruction isn't scalar (SD).
  switch (UserOpc) {
  case X86::CVTSD2SSrr_Int:
  case X86::VCVTSD2SSrr_Int:
  case X86::VCVTSD2SSZrr_Int:
  case X86::VCVTSD2SSZrr_Intk:
  case X86::VCVTSD2SSZrr_Intkz:
  case X86::CVTSD2SIrr_Int:     case X86::CVTSD2SI64rr_Int:
  case X86::VCVTSD2SIrr_Int:    case X86::VCVTSD2SI64rr_Int:
  case X86::VCVTSD2SIZrr_Int:   case X86::VCVTSD2SI64Zrr_Int:
  case X86::CVTTSD2SIrr_Int:    case X86::CVTTSD2SI64rr_Int:
  case X86::VCVTTSD2SIrr_Int:   case X86::VCVTTSD2SI64rr_Int:
  case X86::VCVTTSD2SIZrr_Int:  case X86::VCVTTSD2SI64Zrr_Int:
  case X86::VCVTSD2USIZrr_Int:  case X86::VCVTSD2USI64Zrr_Int:
  case X86::VCVTTSD2USIZrr_Int: case X86::VCVTTSD2USI64Zrr_Int:
  case X86::ROUNDSDr_Int: case X86::VROUNDSDr_Int:
  case X86::COMISDrr_Int: case X86::VCOMISDrr_Int: case X86::VCOMISDZrr_Int:
  case X86::UCOMISDrr_Int:case X86::VUCOMISDrr_Int:case X86::VUCOMISDZrr_Int:
  case X86::ADDSDrr_Int: case X86::VADDSDrr_Int: case X86::VADDSDZrr_Int:
  case X86::CMPSDrr_Int: case X86::VCMPSDrr_Int: case X86::VCMPSDZrr_Int:
  case X86::DIVSDrr_Int: case X86::VDIVSDrr_Int: case X86::VDIVSDZrr_Int:
  case X86::MAXSDrr_Int: case X86::VMAXSDrr_Int: case X86::VMAXSDZrr_Int:
  case X86::MINSDrr_Int: case X86::VMINSDrr_Int: case X86::VMINSDZrr_Int:
  case X86::MULSDrr_Int: case X86::VMULSDrr_Int: case X86::VMULSDZrr_Int:
  case X86::SQRTSDr_Int: case X86::VSQRTSDr_Int: case X86::VSQRTSDZr_Int:
  case X86::SUBSDrr_Int: case X86::VSUBSDrr_Int: case X86::VSUBSDZrr_Int:
  case X86::VADDSDZrr_Intk: case X86::VADDSDZrr_Intkz:
  case X86::VCMPSDZrr_Intk:
  case X86::VDIVSDZrr_Intk: case X86::VDIVSDZrr_Intkz:
  case X86::VMAXSDZrr_Intk: case X86::VMAXSDZrr_Intkz:
  case X86::VMINSDZrr_Intk: case X86::VMINSDZrr_Intkz:
  case X86::VMULSDZrr_Intk: case X86::VMULSDZrr_Intkz:
  case X86::VSQRTSDZr_Intk: case X86::VSQRTSDZr_Intkz:
  case X86::VSUBSDZrr_Intk: case X86::VSUBSDZrr_Intkz:
  case X86::VFMADDSD4rr_Int:   case X86::VFNMADDSD4rr_Int:
  case X86::VFMSUBSD4rr_Int:   case X86::VFNMSUBSD4rr_Int:
  case X86::VFMADD132SDr_Int:  case X86::VFNMADD132SDr_Int:
  case X86::VFMADD213SDr_Int:  case X86::VFNMADD213SDr_Int:
  case X86::VFMADD231SDr_Int:  case X86::VFNMADD231SDr_Int:
  case X86::VFMSUB132SDr_Int:  case X86::VFNMSUB132SDr_Int:
  case X86::VFMSUB213SDr_Int:  case X86::VFNMSUB213SDr_Int:
  case X86::VFMSUB231SDr_Int:  case X86::VFNMSUB231SDr_Int:
  case X86::VFMADD132SDZr_Int: case X86::VFNMADD132SDZr_Int:
  case X86::VFMADD213SDZr_Int: case X86::VFNMADD213SDZr_Int:
  case X86::VFMADD231SDZr_Int: case X86::VFNMADD231SDZr_Int:
  case X86::VFMSUB132SDZr_Int: case X86::VFNMSUB132SDZr_Int:
  case X86::VFMSUB213SDZr_Int: case X86::VFNMSUB213SDZr_Int:
  case X86::VFMSUB231SDZr_Int: case X86::VFNMSUB231SDZr_Int:
  case X86::VFMADD132SDZr_Intk: case X86::VFNMADD132SDZr_Intk:
  case X86::VFMADD213SDZr_Intk: case X86::VFNMADD213SDZr_Intk:
  case X86::VFMADD231SDZr_Intk: case X86::VFNMADD231SDZr_Intk:
  case X86::VFMSUB132SDZr_Intk: case X86::VFNMSUB132SDZr_Intk:
  case X86::VFMSUB213SDZr_Intk: case X86::VFNMSUB213SDZr_Intk:
  case X86::VFMSUB231SDZr_Intk: case X86::VFNMSUB231SDZr_Intk:
  case X86::VFMADD132SDZr_Intkz: case X86::VFNMADD132SDZr_Intkz:
  case X86::VFMADD213SDZr_Intkz: case X86::VFNMADD213SDZr_Intkz:
  case X86::VFMADD231SDZr_Intkz: case X86::VFNMADD231SDZr_Intkz:
  case X86::VFMSUB132SDZr_Intkz: case X86::VFNMSUB132SDZr_Intkz:
  case X86::VFMSUB213SDZr_Intkz: case X86::VFNMSUB213SDZr_Intkz:
  case X86::VFMSUB231SDZr_Intkz: case X86::VFNMSUB231SDZr_Intkz:
  case X86::VFIXUPIMMSDZrri:
  case X86::VFIXUPIMMSDZrrik:
  case X86::VFIXUPIMMSDZrrikz:
  case X86::VFPCLASSSDZrr:
  case X86::VFPCLASSSDZrrk:
  case X86::VGETEXPSDZr:
  case X86::VGETEXPSDZrk:
  case X86::VGETEXPSDZrkz:
  case X86::VGETMANTSDZrri:
  case X86::VGETMANTSDZrrik:
  case X86::VGETMANTSDZrrikz:
  case X86::VRANGESDZrri:
  case X86::VRANGESDZrrik:
  case X86::VRANGESDZrrikz:
  case X86::VRCP14SDZrr:
  case X86::VRCP14SDZrrk:
  case X86::VRCP14SDZrrkz:
  case X86::VRCP28SDZr:
  case X86::VRCP28SDZrk:
  case X86::VRCP28SDZrkz:
  case X86::VREDUCESDZrri:
  case X86::VREDUCESDZrrik:
  case X86::VREDUCESDZrrikz:
  case X86::VRNDSCALESDZr_Int:
  case X86::VRNDSCALESDZr_Intk:
  case X86::VRNDSCALESDZr_Intkz:
  case X86::VRSQRT14SDZrr:
  case X86::VRSQRT14SDZrrk:
  case X86::VRSQRT14SDZrrkz:
  case X86::VRSQRT28SDZr:
  case X86::VRSQRT28SDZrk:
  case X86::VRSQRT28SDZrkz:
  case X86::VSCALEFSDZrr:
  case X86::VSCALEFSDZrrk:
  case X86::VSCALEFSDZrrkz:
    return false;
  default:
    return true;
  }
}

return false;
6040}

6042MachineInstr *X86InstrInfo::foldMemoryOperandImpl(
  MachineFunction &MF, MachineInstr &MI, ArrayRef<unsigned> Ops,
  MachineBasicBlock::iterator InsertPt, MachineInstr &LoadMI,
  LiveIntervals *LIS) const {

// TODO: Support the case where LoadMI loads a wide register, but MI
// only uses a subreg.
for (auto Op : Ops) {
  if (MI.getOperand(Op).getSubReg())
    return nullptr;
}

// If loading from a FrameIndex, fold directly from the FrameIndex.
unsigned NumOps = LoadMI.getDesc().getNumOperands();
int FrameIndex;
if (isLoadFromStackSlot(LoadMI, FrameIndex)) {
  if (isNonFoldablePartialRegisterLoad(LoadMI, MI, MF))
    return nullptr;
  return foldMemoryOperandImpl(MF, MI, Ops, InsertPt, FrameIndex, LIS);
}

// Check switch flag
if (NoFusing) return nullptr;

// Avoid partial and undef register update stalls unless optimizing for size.
if (!MF.getFunction().hasOptSize() &&
    (hasPartialRegUpdate(MI.getOpcode(), Subtarget, /*ForLoadFold*/true) ||
     shouldPreventUndefRegUpdateMemFold(MF, MI)))
  return nullptr;

// Determine the alignment of the load.
Align Alignment;
if (LoadMI.hasOneMemOperand())
  Alignment = (*LoadMI.memoperands_begin())->getAlign();
else
  switch (LoadMI.getOpcode()) {
  case X86::AVX512_512_SET0:
  case X86::AVX512_512_SETALLONES:
    Alignment = Align(64);
    break;
  case X86::AVX2_SETALLONES:
  case X86::AVX1_SETALLONES:
  case X86::AVX_SET0:
  case X86::AVX512_256_SET0:
    Alignment = Align(32);
    break;
  case X86::V_SET0:
  case X86::V_SETALLONES:
  case X86::AVX512_128_SET0:
  case X86::FsFLD0F128:
  case X86::AVX512_FsFLD0F128:
    Alignment = Align(16);
    break;
  case X86::MMX_SET0:
  case X86::FsFLD0SD:
  case X86::AVX512_FsFLD0SD:
    Alignment = Align(8);
    break;
  case X86::FsFLD0SS:
  case X86::AVX512_FsFLD0SS:
    Alignment = Align(4);
    break;
  default:
    return nullptr;
  }
if (Ops.size() == 2 && Ops[0] == 0 && Ops[1] == 1) {
  unsigned NewOpc = 0;
  switch (MI.getOpcode()) {
  default: return nullptr;
  case X86::TEST8rr:  NewOpc = X86::CMP8ri; break;
  case X86::TEST16rr: NewOpc = X86::CMP16ri8; break;
  case X86::TEST32rr: NewOpc = X86::CMP32ri8; break;
  case X86::TEST64rr: NewOpc = X86::CMP64ri8; break;
  }
  // Change to CMPXXri r, 0 first.
  MI.setDesc(get(NewOpc));
  MI.getOperand(1).ChangeToImmediate(0);
} else if (Ops.size() != 1)
  return nullptr;

// Make sure the subregisters match.
// Otherwise we risk changing the size of the load.
if (LoadMI.getOperand(0).getSubReg() != MI.getOperand(Ops[0]).getSubReg())
  return nullptr;

SmallVector<MachineOperand,X86::AddrNumOperands> MOs;
switch (LoadMI.getOpcode()) {
case X86::MMX_SET0:
case X86::V_SET0:
case X86::V_SETALLONES:
case X86::AVX2_SETALLONES:
case X86::AVX1_SETALLONES:
case X86::AVX_SET0:
case X86::AVX512_128_SET0:
case X86::AVX512_256_SET0:
case X86::AVX512_512_SET0:
case X86::AVX512_512_SETALLONES:
case X86::FsFLD0SD:
case X86::AVX512_FsFLD0SD:
case X86::FsFLD0SS:
case X86::AVX512_FsFLD0SS:
case X86::FsFLD0F128:
case X86::AVX512_FsFLD0F128: {
  // Folding a V_SET0 or V_SETALLONES as a load, to ease register pressure.
  // Create a constant-pool entry and operands to load from it.

  // Medium and large mode can't fold loads this way.
  if (MF.getTarget().getCodeModel() != CodeModel::Small &&
      MF.getTarget().getCodeModel() != CodeModel::Kernel)
    return nullptr;

  // x86-32 PIC requires a PIC base register for constant pools.
  unsigned PICBase = 0;
  // Since we're using Small or Kernel code model, we can always use
  // RIP-relative addressing for a smaller encoding.
  if (Subtarget.is64Bit()) {
    PICBase = X86::RIP;
  } else if (MF.getTarget().isPositionIndependent()) {
    // FIXME: PICBase = getGlobalBaseReg(&MF);
    // This doesn't work for several reasons.
    // 1. GlobalBaseReg may have been spilled.
    // 2. It may not be live at MI.
    return nullptr;
  }

  // Create a constant-pool entry.
  MachineConstantPool &MCP = *MF.getConstantPool();
  Type *Ty;
  unsigned Opc = LoadMI.getOpcode();
  if (Opc == X86::FsFLD0SS || Opc == X86::AVX512_FsFLD0SS)
    Ty = Type::getFloatTy(MF.getFunction().getContext());
  else if (Opc == X86::FsFLD0SD || Opc == X86::AVX512_FsFLD0SD)
    Ty = Type::getDoubleTy(MF.getFunction().getContext());
  else if (Opc == X86::FsFLD0F128 || Opc == X86::AVX512_FsFLD0F128)
    Ty = Type::getFP128Ty(MF.getFunction().getContext());
  else if (Opc == X86::AVX512_512_SET0 || Opc == X86::AVX512_512_SETALLONES)
    Ty = FixedVectorType::get(Type::getInt32Ty(MF.getFunction().getContext()),
                              16);
  else if (Opc == X86::AVX2_SETALLONES || Opc == X86::AVX_SET0 ||
           Opc == X86::AVX512_256_SET0 || Opc == X86::AVX1_SETALLONES)
    Ty = FixedVectorType::get(Type::getInt32Ty(MF.getFunction().getContext()),
                              8);
  else if (Opc == X86::MMX_SET0)
    Ty = FixedVectorType::get(Type::getInt32Ty(MF.getFunction().getContext()),
                              2);
  else
    Ty = FixedVectorType::get(Type::getInt32Ty(MF.getFunction().getContext()),
                              4);

  bool IsAllOnes = (Opc == X86::V_SETALLONES || Opc == X86::AVX2_SETALLONES ||
                    Opc == X86::AVX512_512_SETALLONES ||
                    Opc == X86::AVX1_SETALLONES);
  const Constant *C = IsAllOnes ? Constant::getAllOnesValue(Ty) :
                                  Constant::getNullValue(Ty);
  unsigned CPI = MCP.getConstantPoolIndex(C, Alignment);

  // Create operands to load from the constant pool entry.
  MOs.push_back(MachineOperand::CreateReg(PICBase, false));
  MOs.push_back(MachineOperand::CreateImm(1));
  MOs.push_back(MachineOperand::CreateReg(0, false));
  MOs.push_back(MachineOperand::CreateCPI(CPI, 0));
  MOs.push_back(MachineOperand::CreateReg(0, false));
  break;
}
default: {
  if (isNonFoldablePartialRegisterLoad(LoadMI, MI, MF))
    return nullptr;

  // Folding a normal load. Just copy the load's address operands.
  MOs.append(LoadMI.operands_begin() + NumOps - X86::AddrNumOperands,
             LoadMI.operands_begin() + NumOps);
  break;
}
}
return foldMemoryOperandImpl(MF, MI, Ops[0], MOs, InsertPt,
                             /*Size=*/0, Alignment, /*AllowCommute=*/true);
6218}

6220static SmallVector<MachineMemOperand *, 2>
6221extractLoadMMOs(ArrayRef<MachineMemOperand *> MMOs, MachineFunction &MF) {
SmallVector<MachineMemOperand *, 2> LoadMMOs;

for (MachineMemOperand *MMO : MMOs) {
  if (!MMO->isLoad())
    continue;

  if (!MMO->isStore()) {
    // Reuse the MMO.
    LoadMMOs.push_back(MMO);
  } else {
    // Clone the MMO and unset the store flag.
    LoadMMOs.push_back(MF.getMachineMemOperand(
        MMO, MMO->getFlags() & ~MachineMemOperand::MOStore));
  }
}

return LoadMMOs;
6239}

6241static SmallVector<MachineMemOperand *, 2>
6242extractStoreMMOs(ArrayRef<MachineMemOperand *> MMOs, MachineFunction &MF) {
SmallVector<MachineMemOperand *, 2> StoreMMOs;

for (MachineMemOperand *MMO : MMOs) {
  if (!MMO->isStore())
    continue;

  if (!MMO->isLoad()) {
    // Reuse the MMO.
    StoreMMOs.push_back(MMO);
  } else {
    // Clone the MMO and unset the load flag.
    StoreMMOs.push_back(MF.getMachineMemOperand(
        MMO, MMO->getFlags() & ~MachineMemOperand::MOLoad));
  }
}

return StoreMMOs;
6260}

6262static unsigned getBroadcastOpcode(const X86MemoryFoldTableEntry *I,
                                 const TargetRegisterClass *RC,
                                 const X86Subtarget &STI) {
assert(STI.hasAVX512() && "Expected at least AVX512!")((void)0);
unsigned SpillSize = STI.getRegisterInfo()->getSpillSize(*RC);
assert((SpillSize == 64 || STI.hasVLX()) &&((void)0)
       "Can't broadcast less than 64 bytes without AVX512VL!")((void)0);

switch (I->Flags & TB_BCAST_MASK) {
default: llvm_unreachable("Unexpected broadcast type!")__builtin_unreachable();
case TB_BCAST_D:
  switch (SpillSize) {
  default: llvm_unreachable("Unknown spill size")__builtin_unreachable();
  case 16: return X86::VPBROADCASTDZ128rm;
  case 32: return X86::VPBROADCASTDZ256rm;
  case 64: return X86::VPBROADCASTDZrm;
  }
  break;
case TB_BCAST_Q:
  switch (SpillSize) {
  default: llvm_unreachable("Unknown spill size")__builtin_unreachable();
  case 16: return X86::VPBROADCASTQZ128rm;
  case 32: return X86::VPBROADCASTQZ256rm;
  case 64: return X86::VPBROADCASTQZrm;
  }
  break;
case TB_BCAST_SS:
  switch (SpillSize) {
  default: llvm_unreachable("Unknown spill size")__builtin_unreachable();
  case 16: return X86::VBROADCASTSSZ128rm;
  case 32: return X86::VBROADCASTSSZ256rm;
  case 64: return X86::VBROADCASTSSZrm;
  }
  break;
case TB_BCAST_SD:
  switch (SpillSize) {
  default: llvm_unreachable("Unknown spill size")__builtin_unreachable();
  case 16: return X86::VMOVDDUPZ128rm;
  case 32: return X86::VBROADCASTSDZ256rm;
  case 64: return X86::VBROADCASTSDZrm;
  }
  break;
}
6305}

6307bool X86InstrInfo::unfoldMemoryOperand(
  MachineFunction &MF, MachineInstr &MI, unsigned Reg, bool UnfoldLoad,
  bool UnfoldStore, SmallVectorImpl<MachineInstr *> &NewMIs) const {
const X86MemoryFoldTableEntry *I = lookupUnfoldTable(MI.getOpcode());
if (I == nullptr)
  return false;
unsigned Opc = I->DstOp;
unsigned Index = I->Flags & TB_INDEX_MASK;
bool FoldedLoad = I->Flags & TB_FOLDED_LOAD;
bool FoldedStore = I->Flags & TB_FOLDED_STORE;
bool FoldedBCast = I->Flags & TB_FOLDED_BCAST;
if (UnfoldLoad && !FoldedLoad)
  return false;
UnfoldLoad &= FoldedLoad;
if (UnfoldStore && !FoldedStore)
  return false;
UnfoldStore &= FoldedStore;

const MCInstrDesc &MCID = get(Opc);

const TargetRegisterClass *RC = getRegClass(MCID, Index, &RI, MF);
const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
// TODO: Check if 32-byte or greater accesses are slow too?
if (!MI.hasOneMemOperand() && RC == &X86::VR128RegClass &&
    Subtarget.isUnalignedMem16Slow())
  // Without memoperands, loadRegFromAddr and storeRegToStackSlot will
  // conservatively assume the address is unaligned. That's bad for
  // performance.
  return false;
SmallVector<MachineOperand, X86::AddrNumOperands> AddrOps;
SmallVector<MachineOperand,2> BeforeOps;
SmallVector<MachineOperand,2> AfterOps;
SmallVector<MachineOperand,4> ImpOps;
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
  MachineOperand &Op = MI.getOperand(i);
  if (i >= Index && i < Index + X86::AddrNumOperands)
    AddrOps.push_back(Op);
  else if (Op.isReg() && Op.isImplicit())
    ImpOps.push_back(Op);
  else if (i < Index)
    BeforeOps.push_back(Op);
  else if (i > Index)
    AfterOps.push_back(Op);
}

// Emit the load or broadcast instruction.
if (UnfoldLoad) {
  auto MMOs = extractLoadMMOs(MI.memoperands(), MF);

  unsigned Opc;
  if (FoldedBCast) {
    Opc = getBroadcastOpcode(I, RC, Subtarget);
  } else {
    unsigned Alignment = std::max<uint32_t>(TRI.getSpillSize(*RC), 16);
    bool isAligned = !MMOs.empty() && MMOs.front()->getAlign() >= Alignment;
    Opc = getLoadRegOpcode(Reg, RC, isAligned, Subtarget);
  }

  DebugLoc DL;
  MachineInstrBuilder MIB = BuildMI(MF, DL, get(Opc), Reg);
  for (unsigned i = 0, e = AddrOps.size(); i != e; ++i)
    MIB.add(AddrOps[i]);
  MIB.setMemRefs(MMOs);
  NewMIs.push_back(MIB);

  if (UnfoldStore) {
    // Address operands cannot be marked isKill.
    for (unsigned i = 1; i != 1 + X86::AddrNumOperands; ++i) {
      MachineOperand &MO = NewMIs[0]->getOperand(i);
      if (MO.isReg())
        MO.setIsKill(false);
    }
  }
}

// Emit the data processing instruction.
MachineInstr *DataMI = MF.CreateMachineInstr(MCID, MI.getDebugLoc(), true);
MachineInstrBuilder MIB(MF, DataMI);

if (FoldedStore)
  MIB.addReg(Reg, RegState::Define);
for (MachineOperand &BeforeOp : BeforeOps)
  MIB.add(BeforeOp);
if (FoldedLoad)
  MIB.addReg(Reg);
for (MachineOperand &AfterOp : AfterOps)
  MIB.add(AfterOp);
for (MachineOperand &ImpOp : ImpOps) {
  MIB.addReg(ImpOp.getReg(),
             getDefRegState(ImpOp.isDef()) |
             RegState::Implicit |
             getKillRegState(ImpOp.isKill()) |
             getDeadRegState(ImpOp.isDead()) |
             getUndefRegState(ImpOp.isUndef()));
}
// Change CMP32ri r, 0 back to TEST32rr r, r, etc.
switch (DataMI->getOpcode()) {
default: break;
case X86::CMP64ri32:
case X86::CMP64ri8:
case X86::CMP32ri:
case X86::CMP32ri8:
case X86::CMP16ri:
case X86::CMP16ri8:
case X86::CMP8ri: {
  MachineOperand &MO0 = DataMI->getOperand(0);
  MachineOperand &MO1 = DataMI->getOperand(1);
  if (MO1.isImm() && MO1.getImm() == 0) {
    unsigned NewOpc;
    switch (DataMI->getOpcode()) {
    default: llvm_unreachable("Unreachable!")__builtin_unreachable();
    case X86::CMP64ri8:
    case X86::CMP64ri32: NewOpc = X86::TEST64rr; break;
    case X86::CMP32ri8:
    case X86::CMP32ri:   NewOpc = X86::TEST32rr; break;
    case X86::CMP16ri8:
    case X86::CMP16ri:   NewOpc = X86::TEST16rr; break;
    case X86::CMP8ri:    NewOpc = X86::TEST8rr; break;
    }
    DataMI->setDesc(get(NewOpc));
    MO1.ChangeToRegister(MO0.getReg(), false);
  }
}
}
NewMIs.push_back(DataMI);

// Emit the store instruction.
if (UnfoldStore) {
  const TargetRegisterClass *DstRC = getRegClass(MCID, 0, &RI, MF);
  auto MMOs = extractStoreMMOs(MI.memoperands(), MF);
  unsigned Alignment = std::max<uint32_t>(TRI.getSpillSize(*DstRC), 16);
  bool isAligned = !MMOs.empty() && MMOs.front()->getAlign() >= Alignment;
  unsigned Opc = getStoreRegOpcode(Reg, DstRC, isAligned, Subtarget);
  DebugLoc DL;
  MachineInstrBuilder MIB = BuildMI(MF, DL, get(Opc));
  for (unsigned i = 0, e = AddrOps.size(); i != e; ++i)
    MIB.add(AddrOps[i]);
  MIB.addReg(Reg, RegState::Kill);
  MIB.setMemRefs(MMOs);
  NewMIs.push_back(MIB);
}

return true;
6450}

6452bool
6453X86InstrInfo::unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N,
                                SmallVectorImpl<SDNode*> &NewNodes) const {
if (!N->isMachineOpcode())
  return false;

const X86MemoryFoldTableEntry *I = lookupUnfoldTable(N->getMachineOpcode());
if (I == nullptr)
  return false;
unsigned Opc = I->DstOp;
unsigned Index = I->Flags & TB_INDEX_MASK;
bool FoldedLoad = I->Flags & TB_FOLDED_LOAD;
bool FoldedStore = I->Flags & TB_FOLDED_STORE;
bool FoldedBCast = I->Flags & TB_FOLDED_BCAST;
const MCInstrDesc &MCID = get(Opc);
MachineFunction &MF = DAG.getMachineFunction();
const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
const TargetRegisterClass *RC = getRegClass(MCID, Index, &RI, MF);
unsigned NumDefs = MCID.NumDefs;
std::vector<SDValue> AddrOps;
std::vector<SDValue> BeforeOps;
std::vector<SDValue> AfterOps;
SDLoc dl(N);
unsigned NumOps = N->getNumOperands();
for (unsigned i = 0; i != NumOps-1; ++i) {
  SDValue Op = N->getOperand(i);
  if (i >= Index-NumDefs && i < Index-NumDefs + X86::AddrNumOperands)
    AddrOps.push_back(Op);
  else if (i < Index-NumDefs)
    BeforeOps.push_back(Op);
  else if (i > Index-NumDefs)
    AfterOps.push_back(Op);
}
SDValue Chain = N->getOperand(NumOps-1);
AddrOps.push_back(Chain);

// Emit the load instruction.
SDNode *Load = nullptr;
if (FoldedLoad) {
  EVT VT = *TRI.legalclasstypes_begin(*RC);
  auto MMOs = extractLoadMMOs(cast<MachineSDNode>(N)->memoperands(), MF);
  if (MMOs.empty() && RC == &X86::VR128RegClass &&
      Subtarget.isUnalignedMem16Slow())
    // Do not introduce a slow unaligned load.
    return false;
  // FIXME: If a VR128 can have size 32, we should be checking if a 32-byte
  // memory access is slow above.

  unsigned Opc;
  if (FoldedBCast) {
    Opc = getBroadcastOpcode(I, RC, Subtarget);
  } else {
    unsigned Alignment = std::max<uint32_t>(TRI.getSpillSize(*RC), 16);
    bool isAligned = !MMOs.empty() && MMOs.front()->getAlign() >= Alignment;
    Opc = getLoadRegOpcode(0, RC, isAligned, Subtarget);
  }

  Load = DAG.getMachineNode(Opc, dl, VT, MVT::Other, AddrOps);
  NewNodes.push_back(Load);

  // Preserve memory reference information.
  DAG.setNodeMemRefs(cast<MachineSDNode>(Load), MMOs);
}

// Emit the data processing instruction.
std::vector<EVT> VTs;
const TargetRegisterClass *DstRC = nullptr;
if (MCID.getNumDefs() > 0) {
  DstRC = getRegClass(MCID, 0, &RI, MF);
  VTs.push_back(*TRI.legalclasstypes_begin(*DstRC));
}
for (unsigned i = 0, e = N->getNumValues(); i != e; ++i) {
  EVT VT = N->getValueType(i);
  if (VT != MVT::Other && i >= (unsigned)MCID.getNumDefs())
    VTs.push_back(VT);
}
if (Load)
  BeforeOps.push_back(SDValue(Load, 0));
llvm::append_range(BeforeOps, AfterOps);
// Change CMP32ri r, 0 back to TEST32rr r, r, etc.
switch (Opc) {
  default: break;
  case X86::CMP64ri32:
  case X86::CMP64ri8:
  case X86::CMP32ri:
  case X86::CMP32ri8:
  case X86::CMP16ri:
  case X86::CMP16ri8:
  case X86::CMP8ri:
    if (isNullConstant(BeforeOps[1])) {
      switch (Opc) {
        default: llvm_unreachable("Unreachable!")__builtin_unreachable();
        case X86::CMP64ri8:
        case X86::CMP64ri32: Opc = X86::TEST64rr; break;
        case X86::CMP32ri8:
        case X86::CMP32ri:   Opc = X86::TEST32rr; break;
        case X86::CMP16ri8:
        case X86::CMP16ri:   Opc = X86::TEST16rr; break;
        case X86::CMP8ri:    Opc = X86::TEST8rr; break;
      }
      BeforeOps[1] = BeforeOps[0];
    }
}
SDNode *NewNode= DAG.getMachineNode(Opc, dl, VTs, BeforeOps);
NewNodes.push_back(NewNode);

// Emit the store instruction.
if (FoldedStore) {
  AddrOps.pop_back();
  AddrOps.push_back(SDValue(NewNode, 0));
  AddrOps.push_back(Chain);
  auto MMOs = extractStoreMMOs(cast<MachineSDNode>(N)->memoperands(), MF);
  if (MMOs.empty() && RC == &X86::VR128RegClass &&
      Subtarget.isUnalignedMem16Slow())
    // Do not introduce a slow unaligned store.
    return false;
  // FIXME: If a VR128 can have size 32, we should be checking if a 32-byte
  // memory access is slow above.
  unsigned Alignment = std::max<uint32_t>(TRI.getSpillSize(*RC), 16);
  bool isAligned = !MMOs.empty() && MMOs.front()->getAlign() >= Alignment;
  SDNode *Store =
      DAG.getMachineNode(getStoreRegOpcode(0, DstRC, isAligned, Subtarget),
                         dl, MVT::Other, AddrOps);
  NewNodes.push_back(Store);

  // Preserve memory reference information.
  DAG.setNodeMemRefs(cast<MachineSDNode>(Store), MMOs);
}

return true;
6582}

6584unsigned X86InstrInfo::getOpcodeAfterMemoryUnfold(unsigned Opc,
                                    bool UnfoldLoad, bool UnfoldStore,
                                    unsigned *LoadRegIndex) const {
const X86MemoryFoldTableEntry *I = lookupUnfoldTable(Opc);
if (I == nullptr)
  return 0;
bool FoldedLoad = I->Flags & TB_FOLDED_LOAD;
bool FoldedStore = I->Flags & TB_FOLDED_STORE;
if (UnfoldLoad && !FoldedLoad)
  return 0;
if (UnfoldStore && !FoldedStore)
  return 0;
if (LoadRegIndex)
  *LoadRegIndex = I->Flags & TB_INDEX_MASK;
return I->DstOp;
6599}

6601bool
6602X86InstrInfo::areLoadsFromSameBasePtr(SDNode *Load1, SDNode *Load2,
                                   int64_t &Offset1, int64_t &Offset2) const {
if (!Load1->isMachineOpcode() || !Load2->isMachineOpcode())
  return false;
unsigned Opc1 = Load1->getMachineOpcode();
unsigned Opc2 = Load2->getMachineOpcode();
switch (Opc1) {
default: return false;
case X86::MOV8rm:
case X86::MOV16rm:
case X86::MOV32rm:
case X86::MOV64rm:
case X86::LD_Fp32m:
case X86::LD_Fp64m:
case X86::LD_Fp80m:
case X86::MOVSSrm:
case X86::MOVSSrm_alt:
case X86::MOVSDrm:
case X86::MOVSDrm_alt:
case X86::MMX_MOVD64rm:
case X86::MMX_MOVQ64rm:
case X86::MOVAPSrm:
case X86::MOVUPSrm:
case X86::MOVAPDrm:
case X86::MOVUPDrm:
case X86::MOVDQArm:
case X86::MOVDQUrm:
// AVX load instructions
case X86::VMOVSSrm:
case X86::VMOVSSrm_alt:
case X86::VMOVSDrm:
case X86::VMOVSDrm_alt:
case X86::VMOVAPSrm:
case X86::VMOVUPSrm:
case X86::VMOVAPDrm:
case X86::VMOVUPDrm:
case X86::VMOVDQArm:
case X86::VMOVDQUrm:
case X86::VMOVAPSYrm:
case X86::VMOVUPSYrm:
case X86::VMOVAPDYrm:
case X86::VMOVUPDYrm:
case X86::VMOVDQAYrm:
case X86::VMOVDQUYrm:
// AVX512 load instructions
case X86::VMOVSSZrm:
case X86::VMOVSSZrm_alt:
case X86::VMOVSDZrm:
case X86::VMOVSDZrm_alt:
case X86::VMOVAPSZ128rm:
case X86::VMOVUPSZ128rm:
case X86::VMOVAPSZ128rm_NOVLX:
case X86::VMOVUPSZ128rm_NOVLX:
case X86::VMOVAPDZ128rm:
case X86::VMOVUPDZ128rm:
case X86::VMOVDQU8Z128rm:
case X86::VMOVDQU16Z128rm:
case X86::VMOVDQA32Z128rm:
case X86::VMOVDQU32Z128rm:
case X86::VMOVDQA64Z128rm:
case X86::VMOVDQU64Z128rm:
case X86::VMOVAPSZ256rm:
case X86::VMOVUPSZ256rm:
case X86::VMOVAPSZ256rm_NOVLX:
case X86::VMOVUPSZ256rm_NOVLX:
case X86::VMOVAPDZ256rm:
case X86::VMOVUPDZ256rm:
case X86::VMOVDQU8Z256rm:
case X86::VMOVDQU16Z256rm:
case X86::VMOVDQA32Z256rm:
case X86::VMOVDQU32Z256rm:
case X86::VMOVDQA64Z256rm:
case X86::VMOVDQU64Z256rm:
case X86::VMOVAPSZrm:
case X86::VMOVUPSZrm:
case X86::VMOVAPDZrm:
case X86::VMOVUPDZrm:
case X86::VMOVDQU8Zrm:
case X86::VMOVDQU16Zrm:
case X86::VMOVDQA32Zrm:
case X86::VMOVDQU32Zrm:
case X86::VMOVDQA64Zrm:
case X86::VMOVDQU64Zrm:
case X86::KMOVBkm:
case X86::KMOVWkm:
case X86::KMOVDkm:
case X86::KMOVQkm:
  break;
}
switch (Opc2) {
default: return false;
case X86::MOV8rm:
case X86::MOV16rm:
case X86::MOV32rm:
case X86::MOV64rm:
case X86::LD_Fp32m:
case X86::LD_Fp64m:
case X86::LD_Fp80m:
case X86::MOVSSrm:
case X86::MOVSSrm_alt:
case X86::MOVSDrm:
case X86::MOVSDrm_alt:
case X86::MMX_MOVD64rm:
case X86::MMX_MOVQ64rm:
case X86::MOVAPSrm:
case X86::MOVUPSrm:
case X86::MOVAPDrm:
case X86::MOVUPDrm:
case X86::MOVDQArm:
case X86::MOVDQUrm:
// AVX load instructions
case X86::VMOVSSrm:
case X86::VMOVSSrm_alt:
case X86::VMOVSDrm:
case X86::VMOVSDrm_alt:
case X86::VMOVAPSrm:
case X86::VMOVUPSrm:
case X86::VMOVAPDrm:
case X86::VMOVUPDrm:
case X86::VMOVDQArm:
case X86::VMOVDQUrm:
case X86::VMOVAPSYrm:
case X86::VMOVUPSYrm:
case X86::VMOVAPDYrm:
case X86::VMOVUPDYrm:
case X86::VMOVDQAYrm:
case X86::VMOVDQUYrm:
// AVX512 load instructions
case X86::VMOVSSZrm:
case X86::VMOVSSZrm_alt:
case X86::VMOVSDZrm:
case X86::VMOVSDZrm_alt:
case X86::VMOVAPSZ128rm:
case X86::VMOVUPSZ128rm:
case X86::VMOVAPSZ128rm_NOVLX:
case X86::VMOVUPSZ128rm_NOVLX:
case X86::VMOVAPDZ128rm:
case X86::VMOVUPDZ128rm:
case X86::VMOVDQU8Z128rm:
case X86::VMOVDQU16Z128rm:
case X86::VMOVDQA32Z128rm:
case X86::VMOVDQU32Z128rm:
case X86::VMOVDQA64Z128rm:
case X86::VMOVDQU64Z128rm:
case X86::VMOVAPSZ256rm:
case X86::VMOVUPSZ256rm:
case X86::VMOVAPSZ256rm_NOVLX:
case X86::VMOVUPSZ256rm_NOVLX:
case X86::VMOVAPDZ256rm:
case X86::VMOVUPDZ256rm:
case X86::VMOVDQU8Z256rm:
case X86::VMOVDQU16Z256rm:
case X86::VMOVDQA32Z256rm:
case X86::VMOVDQU32Z256rm:
case X86::VMOVDQA64Z256rm:
case X86::VMOVDQU64Z256rm:
case X86::VMOVAPSZrm:
case X86::VMOVUPSZrm:
case X86::VMOVAPDZrm:
case X86::VMOVUPDZrm:
case X86::VMOVDQU8Zrm:
case X86::VMOVDQU16Zrm:
case X86::VMOVDQA32Zrm:
case X86::VMOVDQU32Zrm:
case X86::VMOVDQA64Zrm:
case X86::VMOVDQU64Zrm:
case X86::KMOVBkm:
case X86::KMOVWkm:
case X86::KMOVDkm:
case X86::KMOVQkm:
  break;
}

// Lambda to check if both the loads have the same value for an operand index.
auto HasSameOp = [&](int I) {
  return Load1->getOperand(I) == Load2->getOperand(I);
};

// All operands except the displacement should match.
if (!HasSameOp(X86::AddrBaseReg) || !HasSameOp(X86::AddrScaleAmt) ||
    !HasSameOp(X86::AddrIndexReg) || !HasSameOp(X86::AddrSegmentReg))
  return false;

// Chain Operand must be the same.
if (!HasSameOp(5))
  return false;

// Now let's examine if the displacements are constants.
auto Disp1 = dyn_cast<ConstantSDNode>(Load1->getOperand(X86::AddrDisp));
auto Disp2 = dyn_cast<ConstantSDNode>(Load2->getOperand(X86::AddrDisp));
if (!Disp1 || !Disp2)
  return false;

Offset1 = Disp1->getSExtValue();
Offset2 = Disp2->getSExtValue();
return true;
6798}

6800bool X86InstrInfo::shouldScheduleLoadsNear(SDNode *Load1, SDNode *Load2,
                                         int64_t Offset1, int64_t Offset2,
                                         unsigned NumLoads) const {
assert(Offset2 > Offset1)((void)0);
if ((Offset2 - Offset1) / 8 > 64)
  return false;

unsigned Opc1 = Load1->getMachineOpcode();
unsigned Opc2 = Load2->getMachineOpcode();
if (Opc1 != Opc2)
  return false;  // FIXME: overly conservative?

switch (Opc1) {
default: break;
case X86::LD_Fp32m:
case X86::LD_Fp64m:
case X86::LD_Fp80m:
case X86::MMX_MOVD64rm:
case X86::MMX_MOVQ64rm:
  return false;
}

EVT VT = Load1->getValueType(0);
switch (VT.getSimpleVT().SimpleTy) {
default:
  // XMM registers. In 64-bit mode we can be a bit more aggressive since we
  // have 16 of them to play with.
  if (Subtarget.is64Bit()) {
    if (NumLoads >= 3)
      return false;
  } else if (NumLoads) {
    return false;
  }
  break;
case MVT::i8:
case MVT::i16:
case MVT::i32:
case MVT::i64:
case MVT::f32:
case MVT::f64:
  if (NumLoads)
    return false;
  break;
}

return true;
6846}

6848bool X86InstrInfo::isSchedulingBoundary(const MachineInstr &MI,
                                      const MachineBasicBlock *MBB,
                                      const MachineFunction &MF) const {

// ENDBR instructions should not be scheduled around.
unsigned Opcode = MI.getOpcode();
if (Opcode == X86::ENDBR64 || Opcode == X86::ENDBR32 ||
    Opcode == X86::LDTILECFG)
  return true;

return TargetInstrInfo::isSchedulingBoundary(MI, MBB, MF);
6859}

6861bool X86InstrInfo::
6862reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const {
assert(Cond.size() == 1 && "Invalid X86 branch condition!")((void)0);
X86::CondCode CC = static_cast<X86::CondCode>(Cond[0].getImm());
Cond[0].setImm(GetOppositeBranchCondition(CC));
return false;
6867}

6869bool X86InstrInfo::
6870isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const {
// FIXME: Return false for x87 stack register classes for now. We can't
// allow any loads of these registers before FpGet_ST0_80.
return !(RC == &X86::CCRRegClass || RC == &X86::DFCCRRegClass ||
         RC == &X86::RFP32RegClass || RC == &X86::RFP64RegClass ||
         RC == &X86::RFP80RegClass);
6876}

6878/// Return a virtual register initialized with the
6879/// the global base register value. Output instructions required to
6880/// initialize the register in the function entry block, if necessary.
6881///
6882/// TODO: Eliminate this and move the code to X86MachineFunctionInfo.
6883///
6884unsigned X86InstrInfo::getGlobalBaseReg(MachineFunction *MF) const {
assert((!Subtarget.is64Bit() ||((void)0)
        MF->getTarget().getCodeModel() == CodeModel::Medium ||((void)0)
        MF->getTarget().getCodeModel() == CodeModel::Large) &&((void)0)
       "X86-64 PIC uses RIP relative addressing")((void)0);

X86MachineFunctionInfo *X86FI = MF->getInfo<X86MachineFunctionInfo>();
Register GlobalBaseReg = X86FI->getGlobalBaseReg();
if (GlobalBaseReg != 0)
  return GlobalBaseReg;

// Create the register. The code to initialize it is inserted
// later, by the CGBR pass (below).
MachineRegisterInfo &RegInfo = MF->getRegInfo();
GlobalBaseReg = RegInfo.createVirtualRegister(
    Subtarget.is64Bit() ? &X86::GR64_NOSPRegClass : &X86::GR32_NOSPRegClass);
X86FI->setGlobalBaseReg(GlobalBaseReg);
return GlobalBaseReg;
6902}

6904// These are the replaceable SSE instructions. Some of these have Int variants
6905// that we don't include here. We don't want to replace instructions selected
6906// by intrinsics.
6907static const uint16_t ReplaceableInstrs[][3] = {
//PackedSingle     PackedDouble    PackedInt
{ X86::MOVAPSmr,   X86::MOVAPDmr,  X86::MOVDQAmr  },
{ X86::MOVAPSrm,   X86::MOVAPDrm,  X86::MOVDQArm  },
{ X86::MOVAPSrr,   X86::MOVAPDrr,  X86::MOVDQArr  },
{ X86::MOVUPSmr,   X86::MOVUPDmr,  X86::MOVDQUmr  },
{ X86::MOVUPSrm,   X86::MOVUPDrm,  X86::MOVDQUrm  },
{ X86::MOVLPSmr,   X86::MOVLPDmr,  X86::MOVPQI2QImr },
{ X86::MOVSDmr,    X86::MOVSDmr,   X86::MOVPQI2QImr },
{ X86::MOVSSmr,    X86::MOVSSmr,   X86::MOVPDI2DImr },
{ X86::MOVSDrm,    X86::MOVSDrm,   X86::MOVQI2PQIrm },
{ X86::MOVSDrm_alt,X86::MOVSDrm_alt,X86::MOVQI2PQIrm },
{ X86::MOVSSrm,    X86::MOVSSrm,   X86::MOVDI2PDIrm },
{ X86::MOVSSrm_alt,X86::MOVSSrm_alt,X86::MOVDI2PDIrm },
{ X86::MOVNTPSmr,  X86::MOVNTPDmr, X86::MOVNTDQmr },
{ X86::ANDNPSrm,   X86::ANDNPDrm,  X86::PANDNrm   },
{ X86::ANDNPSrr,   X86::ANDNPDrr,  X86::PANDNrr   },
{ X86::ANDPSrm,    X86::ANDPDrm,   X86::PANDrm    },
{ X86::ANDPSrr,    X86::ANDPDrr,   X86::PANDrr    },
{ X86::ORPSrm,     X86::ORPDrm,    X86::PORrm     },
{ X86::ORPSrr,     X86::ORPDrr,    X86::PORrr     },
{ X86::XORPSrm,    X86::XORPDrm,   X86::PXORrm    },
{ X86::XORPSrr,    X86::XORPDrr,   X86::PXORrr    },
{ X86::UNPCKLPDrm, X86::UNPCKLPDrm, X86::PUNPCKLQDQrm },
{ X86::MOVLHPSrr,  X86::UNPCKLPDrr, X86::PUNPCKLQDQrr },
{ X86::UNPCKHPDrm, X86::UNPCKHPDrm, X86::PUNPCKHQDQrm },
{ X86::UNPCKHPDrr, X86::UNPCKHPDrr, X86::PUNPCKHQDQrr },
{ X86::UNPCKLPSrm, X86::UNPCKLPSrm, X86::PUNPCKLDQrm },
{ X86::UNPCKLPSrr, X86::UNPCKLPSrr, X86::PUNPCKLDQrr },
{ X86::UNPCKHPSrm, X86::UNPCKHPSrm, X86::PUNPCKHDQrm },
{ X86::UNPCKHPSrr, X86::UNPCKHPSrr, X86::PUNPCKHDQrr },
{ X86::EXTRACTPSmr, X86::EXTRACTPSmr, X86::PEXTRDmr },
{ X86::EXTRACTPSrr, X86::EXTRACTPSrr, X86::PEXTRDrr },
// AVX 128-bit support
{ X86::VMOVAPSmr,  X86::VMOVAPDmr,  X86::VMOVDQAmr  },
{ X86::VMOVAPSrm,  X86::VMOVAPDrm,  X86::VMOVDQArm  },
{ X86::VMOVAPSrr,  X86::VMOVAPDrr,  X86::VMOVDQArr  },
{ X86::VMOVUPSmr,  X86::VMOVUPDmr,  X86::VMOVDQUmr  },
{ X86::VMOVUPSrm,  X86::VMOVUPDrm,  X86::VMOVDQUrm  },
{ X86::VMOVLPSmr,  X86::VMOVLPDmr,  X86::VMOVPQI2QImr },
{ X86::VMOVSDmr,   X86::VMOVSDmr,   X86::VMOVPQI2QImr },
{ X86::VMOVSSmr,   X86::VMOVSSmr,   X86::VMOVPDI2DImr },
{ X86::VMOVSDrm,   X86::VMOVSDrm,   X86::VMOVQI2PQIrm },
{ X86::VMOVSDrm_alt,X86::VMOVSDrm_alt,X86::VMOVQI2PQIrm },
{ X86::VMOVSSrm,   X86::VMOVSSrm,   X86::VMOVDI2PDIrm },
{ X86::VMOVSSrm_alt,X86::VMOVSSrm_alt,X86::VMOVDI2PDIrm },
{ X86::VMOVNTPSmr, X86::VMOVNTPDmr, X86::VMOVNTDQmr },
{ X86::VANDNPSrm,  X86::VANDNPDrm,  X86::VPANDNrm   },
{ X86::VANDNPSrr,  X86::VANDNPDrr,  X86::VPANDNrr   },
{ X86::VANDPSrm,   X86::VANDPDrm,   X86::VPANDrm    },
{ X86::VANDPSrr,   X86::VANDPDrr,   X86::VPANDrr    },
{ X86::VORPSrm,    X86::VORPDrm,    X86::VPORrm     },
{ X86::VORPSrr,    X86::VORPDrr,    X86::VPORrr     },
{ X86::VXORPSrm,   X86::VXORPDrm,   X86::VPXORrm    },
{ X86::VXORPSrr,   X86::VXORPDrr,   X86::VPXORrr    },
{ X86::VUNPCKLPDrm, X86::VUNPCKLPDrm, X86::VPUNPCKLQDQrm },
{ X86::VMOVLHPSrr,  X86::VUNPCKLPDrr, X86::VPUNPCKLQDQrr },
{ X86::VUNPCKHPDrm, X86::VUNPCKHPDrm, X86::VPUNPCKHQDQrm },
{ X86::VUNPCKHPDrr, X86::VUNPCKHPDrr, X86::VPUNPCKHQDQrr },
{ X86::VUNPCKLPSrm, X86::VUNPCKLPSrm, X86::VPUNPCKLDQrm },
{ X86::VUNPCKLPSrr, X86::VUNPCKLPSrr, X86::VPUNPCKLDQrr },
{ X86::VUNPCKHPSrm, X86::VUNPCKHPSrm, X86::VPUNPCKHDQrm },
{ X86::VUNPCKHPSrr, X86::VUNPCKHPSrr, X86::VPUNPCKHDQrr },
{ X86::VEXTRACTPSmr, X86::VEXTRACTPSmr, X86::VPEXTRDmr },
{ X86::VEXTRACTPSrr, X86::VEXTRACTPSrr, X86::VPEXTRDrr },
// AVX 256-bit support
{ X86::VMOVAPSYmr,   X86::VMOVAPDYmr,   X86::VMOVDQAYmr  },
{ X86::VMOVAPSYrm,   X86::VMOVAPDYrm,   X86::VMOVDQAYrm  },
{ X86::VMOVAPSYrr,   X86::VMOVAPDYrr,   X86::VMOVDQAYrr  },
{ X86::VMOVUPSYmr,   X86::VMOVUPDYmr,   X86::VMOVDQUYmr  },
{ X86::VMOVUPSYrm,   X86::VMOVUPDYrm,   X86::VMOVDQUYrm  },
{ X86::VMOVNTPSYmr,  X86::VMOVNTPDYmr,  X86::VMOVNTDQYmr },
{ X86::VPERMPSYrm,   X86::VPERMPSYrm,   X86::VPERMDYrm },
{ X86::VPERMPSYrr,   X86::VPERMPSYrr,   X86::VPERMDYrr },
{ X86::VPERMPDYmi,   X86::VPERMPDYmi,   X86::VPERMQYmi },
{ X86::VPERMPDYri,   X86::VPERMPDYri,   X86::VPERMQYri },
// AVX512 support
{ X86::VMOVLPSZ128mr,  X86::VMOVLPDZ128mr,  X86::VMOVPQI2QIZmr  },
{ X86::VMOVNTPSZ128mr, X86::VMOVNTPDZ128mr, X86::VMOVNTDQZ128mr },
{ X86::VMOVNTPSZ256mr, X86::VMOVNTPDZ256mr, X86::VMOVNTDQZ256mr },
{ X86::VMOVNTPSZmr,    X86::VMOVNTPDZmr,    X86::VMOVNTDQZmr    },
{ X86::VMOVSDZmr,      X86::VMOVSDZmr,      X86::VMOVPQI2QIZmr  },
{ X86::VMOVSSZmr,      X86::VMOVSSZmr,      X86::VMOVPDI2DIZmr  },
{ X86::VMOVSDZrm,      X86::VMOVSDZrm,      X86::VMOVQI2PQIZrm  },
{ X86::VMOVSDZrm_alt,  X86::VMOVSDZrm_alt,  X86::VMOVQI2PQIZrm  },
{ X86::VMOVSSZrm,      X86::VMOVSSZrm,      X86::VMOVDI2PDIZrm  },
{ X86::VMOVSSZrm_alt,  X86::VMOVSSZrm_alt,  X86::VMOVDI2PDIZrm  },
{ X86::VBROADCASTSSZ128rr,X86::VBROADCASTSSZ128rr,X86::VPBROADCASTDZ128rr },
{ X86::VBROADCASTSSZ128rm,X86::VBROADCASTSSZ128rm,X86::VPBROADCASTDZ128rm },
{ X86::VBROADCASTSSZ256rr,X86::VBROADCASTSSZ256rr,X86::VPBROADCASTDZ256rr },
{ X86::VBROADCASTSSZ256rm,X86::VBROADCASTSSZ256rm,X86::VPBROADCASTDZ256rm },
{ X86::VBROADCASTSSZrr,   X86::VBROADCASTSSZrr,   X86::VPBROADCASTDZrr },
{ X86::VBROADCASTSSZrm,   X86::VBROADCASTSSZrm,   X86::VPBROADCASTDZrm },
{ X86::VMOVDDUPZ128rr,    X86::VMOVDDUPZ128rr,    X86::VPBROADCASTQZ128rr },
{ X86::VMOVDDUPZ128rm,    X86::VMOVDDUPZ128rm,    X86::VPBROADCASTQZ128rm },
{ X86::VBROADCASTSDZ256rr,X86::VBROADCASTSDZ256rr,X86::VPBROADCASTQZ256rr },
{ X86::VBROADCASTSDZ256rm,X86::VBROADCASTSDZ256rm,X86::VPBROADCASTQZ256rm },
{ X86::VBROADCASTSDZrr,   X86::VBROADCASTSDZrr,   X86::VPBROADCASTQZrr },
{ X86::VBROADCASTSDZrm,   X86::VBROADCASTSDZrm,   X86::VPBROADCASTQZrm },
{ X86::VINSERTF32x4Zrr,   X86::VINSERTF32x4Zrr,   X86::VINSERTI32x4Zrr },
{ X86::VINSERTF32x4Zrm,   X86::VINSERTF32x4Zrm,   X86::VINSERTI32x4Zrm },
{ X86::VINSERTF32x8Zrr,   X86::VINSERTF32x8Zrr,   X86::VINSERTI32x8Zrr },
{ X86::VINSERTF32x8Zrm,   X86::VINSERTF32x8Zrm,   X86::VINSERTI32x8Zrm },
{ X86::VINSERTF64x2Zrr,   X86::VINSERTF64x2Zrr,   X86::VINSERTI64x2Zrr },
{ X86::VINSERTF64x2Zrm,   X86::VINSERTF64x2Zrm,   X86::VINSERTI64x2Zrm },
{ X86::VINSERTF64x4Zrr,   X86::VINSERTF64x4Zrr,   X86::VINSERTI64x4Zrr },
{ X86::VINSERTF64x4Zrm,   X86::VINSERTF64x4Zrm,   X86::VINSERTI64x4Zrm },
{ X86::VINSERTF32x4Z256rr,X86::VINSERTF32x4Z256rr,X86::VINSERTI32x4Z256rr },
{ X86::VINSERTF32x4Z256rm,X86::VINSERTF32x4Z256rm,X86::VINSERTI32x4Z256rm },
{ X86::VINSERTF64x2Z256rr,X86::VINSERTF64x2Z256rr,X86::VINSERTI64x2Z256rr },
{ X86::VINSERTF64x2Z256rm,X86::VINSERTF64x2Z256rm,X86::VINSERTI64x2Z256rm },
{ X86::VEXTRACTF32x4Zrr,   X86::VEXTRACTF32x4Zrr,   X86::VEXTRACTI32x4Zrr },
{ X86::VEXTRACTF32x4Zmr,   X86::VEXTRACTF32x4Zmr,   X86::VEXTRACTI32x4Zmr },
{ X86::VEXTRACTF32x8Zrr,   X86::VEXTRACTF32x8Zrr,   X86::VEXTRACTI32x8Zrr },
{ X86::VEXTRACTF32x8Zmr,   X86::VEXTRACTF32x8Zmr,   X86::VEXTRACTI32x8Zmr },
{ X86::VEXTRACTF64x2Zrr,   X86::VEXTRACTF64x2Zrr,   X86::VEXTRACTI64x2Zrr },
{ X86::VEXTRACTF64x2Zmr,   X86::VEXTRACTF64x2Zmr,   X86::VEXTRACTI64x2Zmr },
{ X86::VEXTRACTF64x4Zrr,   X86::VEXTRACTF64x4Zrr,   X86::VEXTRACTI64x4Zrr },
{ X86::VEXTRACTF64x4Zmr,   X86::VEXTRACTF64x4Zmr,   X86::VEXTRACTI64x4Zmr },
{ X86::VEXTRACTF32x4Z256rr,X86::VEXTRACTF32x4Z256rr,X86::VEXTRACTI32x4Z256rr },
{ X86::VEXTRACTF32x4Z256mr,X86::VEXTRACTF32x4Z256mr,X86::VEXTRACTI32x4Z256mr },
{ X86::VEXTRACTF64x2Z256rr,X86::VEXTRACTF64x2Z256rr,X86::VEXTRACTI64x2Z256rr },
{ X86::VEXTRACTF64x2Z256mr,X86::VEXTRACTF64x2Z256mr,X86::VEXTRACTI64x2Z256mr },
{ X86::VPERMILPSmi,        X86::VPERMILPSmi,        X86::VPSHUFDmi },
{ X86::VPERMILPSri,        X86::VPERMILPSri,        X86::VPSHUFDri },
{ X86::VPERMILPSZ128mi,    X86::VPERMILPSZ128mi,    X86::VPSHUFDZ128mi },
{ X86::VPERMILPSZ128ri,    X86::VPERMILPSZ128ri,    X86::VPSHUFDZ128ri },
{ X86::VPERMILPSZ256mi,    X86::VPERMILPSZ256mi,    X86::VPSHUFDZ256mi },
{ X86::VPERMILPSZ256ri,    X86::VPERMILPSZ256ri,    X86::VPSHUFDZ256ri },
{ X86::VPERMILPSZmi,       X86::VPERMILPSZmi,       X86::VPSHUFDZmi },
{ X86::VPERMILPSZri,       X86::VPERMILPSZri,       X86::VPSHUFDZri },
{ X86::VPERMPSZ256rm,      X86::VPERMPSZ256rm,      X86::VPERMDZ256rm },
{ X86::VPERMPSZ256rr,      X86::VPERMPSZ256rr,      X86::VPERMDZ256rr },
{ X86::VPERMPDZ256mi,      X86::VPERMPDZ256mi,      X86::VPERMQZ256mi },
{ X86::VPERMPDZ256ri,      X86::VPERMPDZ256ri,      X86::VPERMQZ256ri },
{ X86::VPERMPDZ256rm,      X86::VPERMPDZ256rm,      X86::VPERMQZ256rm },
{ X86::VPERMPDZ256rr,      X86::VPERMPDZ256rr,      X86::VPERMQZ256rr },
{ X86::VPERMPSZrm,         X86::VPERMPSZrm,         X86::VPERMDZrm },
{ X86::VPERMPSZrr,         X86::VPERMPSZrr,         X86::VPERMDZrr },
{ X86::VPERMPDZmi,         X86::VPERMPDZmi,         X86::VPERMQZmi },
{ X86::VPERMPDZri,         X86::VPERMPDZri,         X86::VPERMQZri },
{ X86::VPERMPDZrm,         X86::VPERMPDZrm,         X86::VPERMQZrm },
{ X86::VPERMPDZrr,         X86::VPERMPDZrr,         X86::VPERMQZrr },
{ X86::VUNPCKLPDZ256rm,    X86::VUNPCKLPDZ256rm,    X86::VPUNPCKLQDQZ256rm },
{ X86::VUNPCKLPDZ256rr,    X86::VUNPCKLPDZ256rr,    X86::VPUNPCKLQDQZ256rr },
{ X86::VUNPCKHPDZ256rm,    X86::VUNPCKHPDZ256rm,    X86::VPUNPCKHQDQZ256rm },
{ X86::VUNPCKHPDZ256rr,    X86::VUNPCKHPDZ256rr,    X86::VPUNPCKHQDQZ256rr },
{ X86::VUNPCKLPSZ256rm,    X86::VUNPCKLPSZ256rm,    X86::VPUNPCKLDQZ256rm },
{ X86::VUNPCKLPSZ256rr,    X86::VUNPCKLPSZ256rr,    X86::VPUNPCKLDQZ256rr },
{ X86::VUNPCKHPSZ256rm,    X86::VUNPCKHPSZ256rm,    X86::VPUNPCKHDQZ256rm },
{ X86::VUNPCKHPSZ256rr,    X86::VUNPCKHPSZ256rr,    X86::VPUNPCKHDQZ256rr },
{ X86::VUNPCKLPDZ128rm,    X86::VUNPCKLPDZ128rm,    X86::VPUNPCKLQDQZ128rm },
{ X86::VMOVLHPSZrr,        X86::VUNPCKLPDZ128rr,    X86::VPUNPCKLQDQZ128rr },
{ X86::VUNPCKHPDZ128rm,    X86::VUNPCKHPDZ128rm,    X86::VPUNPCKHQDQZ128rm },
{ X86::VUNPCKHPDZ128rr,    X86::VUNPCKHPDZ128rr,    X86::VPUNPCKHQDQZ128rr },
{ X86::VUNPCKLPSZ128rm,    X86::VUNPCKLPSZ128rm,    X86::VPUNPCKLDQZ128rm },
{ X86::VUNPCKLPSZ128rr,    X86::VUNPCKLPSZ128rr,    X86::VPUNPCKLDQZ128rr },
{ X86::VUNPCKHPSZ128rm,    X86::VUNPCKHPSZ128rm,    X86::VPUNPCKHDQZ128rm },
{ X86::VUNPCKHPSZ128rr,    X86::VUNPCKHPSZ128rr,    X86::VPUNPCKHDQZ128rr },
{ X86::VUNPCKLPDZrm,       X86::VUNPCKLPDZrm,       X86::VPUNPCKLQDQZrm },
{ X86::VUNPCKLPDZrr,       X86::VUNPCKLPDZrr,       X86::VPUNPCKLQDQZrr },
{ X86::VUNPCKHPDZrm,       X86::VUNPCKHPDZrm,       X86::VPUNPCKHQDQZrm },
{ X86::VUNPCKHPDZrr,       X86::VUNPCKHPDZrr,       X86::VPUNPCKHQDQZrr },
{ X86::VUNPCKLPSZrm,       X86::VUNPCKLPSZrm,       X86::VPUNPCKLDQZrm },
{ X86::VUNPCKLPSZrr,       X86::VUNPCKLPSZrr,       X86::VPUNPCKLDQZrr },
{ X86::VUNPCKHPSZrm,       X86::VUNPCKHPSZrm,       X86::VPUNPCKHDQZrm },
{ X86::VUNPCKHPSZrr,       X86::VUNPCKHPSZrr,       X86::VPUNPCKHDQZrr },
{ X86::VEXTRACTPSZmr,      X86::VEXTRACTPSZmr,      X86::VPEXTRDZmr },
{ X86::VEXTRACTPSZrr,      X86::VEXTRACTPSZrr,      X86::VPEXTRDZrr },
7076};

7078static const uint16_t ReplaceableInstrsAVX2[][3] = {
//PackedSingle       PackedDouble       PackedInt
{ X86::VANDNPSYrm,   X86::VANDNPDYrm,   X86::VPANDNYrm   },
{ X86::VANDNPSYrr,   X86::VANDNPDYrr,   X86::VPANDNYrr   },
{ X86::VANDPSYrm,    X86::VANDPDYrm,    X86::VPANDYrm    },
{ X86::VANDPSYrr,    X86::VANDPDYrr,    X86::VPANDYrr    },
{ X86::VORPSYrm,     X86::VORPDYrm,     X86::VPORYrm     },
{ X86::VORPSYrr,     X86::VORPDYrr,     X86::VPORYrr     },
{ X86::VXORPSYrm,    X86::VXORPDYrm,    X86::VPXORYrm    },
{ X86::VXORPSYrr,    X86::VXORPDYrr,    X86::VPXORYrr    },
{ X86::VPERM2F128rm,   X86::VPERM2F128rm,   X86::VPERM2I128rm },
{ X86::VPERM2F128rr,   X86::VPERM2F128rr,   X86::VPERM2I128rr },
{ X86::VBROADCASTSSrm, X86::VBROADCASTSSrm, X86::VPBROADCASTDrm},
{ X86::VBROADCASTSSrr, X86::VBROADCASTSSrr, X86::VPBROADCASTDrr},
{ X86::VMOVDDUPrm,     X86::VMOVDDUPrm,     X86::VPBROADCASTQrm},
{ X86::VMOVDDUPrr,     X86::VMOVDDUPrr,     X86::VPBROADCASTQrr},
{ X86::VBROADCASTSSYrr, X86::VBROADCASTSSYrr, X86::VPBROADCASTDYrr},
{ X86::VBROADCASTSSYrm, X86::VBROADCASTSSYrm, X86::VPBROADCASTDYrm},
{ X86::VBROADCASTSDYrr, X86::VBROADCASTSDYrr, X86::VPBROADCASTQYrr},
{ X86::VBROADCASTSDYrm, X86::VBROADCASTSDYrm, X86::VPBROADCASTQYrm},
{ X86::VBROADCASTF128,  X86::VBROADCASTF128,  X86::VBROADCASTI128 },
{ X86::VBLENDPSYrri,    X86::VBLENDPSYrri,    X86::VPBLENDDYrri },
{ X86::VBLENDPSYrmi,    X86::VBLENDPSYrmi,    X86::VPBLENDDYrmi },
{ X86::VPERMILPSYmi,    X86::VPERMILPSYmi,    X86::VPSHUFDYmi },
{ X86::VPERMILPSYri,    X86::VPERMILPSYri,    X86::VPSHUFDYri },
{ X86::VUNPCKLPDYrm,    X86::VUNPCKLPDYrm,    X86::VPUNPCKLQDQYrm },
{ X86::VUNPCKLPDYrr,    X86::VUNPCKLPDYrr,    X86::VPUNPCKLQDQYrr },
{ X86::VUNPCKHPDYrm,    X86::VUNPCKHPDYrm,    X86::VPUNPCKHQDQYrm },
{ X86::VUNPCKHPDYrr,    X86::VUNPCKHPDYrr,    X86::VPUNPCKHQDQYrr },
{ X86::VUNPCKLPSYrm,    X86::VUNPCKLPSYrm,    X86::VPUNPCKLDQYrm },
{ X86::VUNPCKLPSYrr,    X86::VUNPCKLPSYrr,    X86::VPUNPCKLDQYrr },
{ X86::VUNPCKHPSYrm,    X86::VUNPCKHPSYrm,    X86::VPUNPCKHDQYrm },
{ X86::VUNPCKHPSYrr,    X86::VUNPCKHPSYrr,    X86::VPUNPCKHDQYrr },
7111};

7113static const uint16_t ReplaceableInstrsFP[][3] = {
//PackedSingle         PackedDouble
{ X86::MOVLPSrm,       X86::MOVLPDrm,      X86::INSTRUCTION_LIST_END },
{ X86::MOVHPSrm,       X86::MOVHPDrm,      X86::INSTRUCTION_LIST_END },
{ X86::MOVHPSmr,       X86::MOVHPDmr,      X86::INSTRUCTION_LIST_END },
{ X86::VMOVLPSrm,      X86::VMOVLPDrm,     X86::INSTRUCTION_LIST_END },
{ X86::VMOVHPSrm,      X86::VMOVHPDrm,     X86::INSTRUCTION_LIST_END },
{ X86::VMOVHPSmr,      X86::VMOVHPDmr,     X86::INSTRUCTION_LIST_END },
{ X86::VMOVLPSZ128rm,  X86::VMOVLPDZ128rm, X86::INSTRUCTION_LIST_END },
{ X86::VMOVHPSZ128rm,  X86::VMOVHPDZ128rm, X86::INSTRUCTION_LIST_END },
{ X86::VMOVHPSZ128mr,  X86::VMOVHPDZ128mr, X86::INSTRUCTION_LIST_END },
7124};

7126static const uint16_t ReplaceableInstrsAVX2InsertExtract[][3] = {
//PackedSingle       PackedDouble       PackedInt
{ X86::VEXTRACTF128mr, X86::VEXTRACTF128mr, X86::VEXTRACTI128mr },
{ X86::VEXTRACTF128rr, X86::VEXTRACTF128rr, X86::VEXTRACTI128rr },
{ X86::VINSERTF128rm,  X86::VINSERTF128rm,  X86::VINSERTI128rm },
{ X86::VINSERTF128rr,  X86::VINSERTF128rr,  X86::VINSERTI128rr },
7132};

7134static const uint16_t ReplaceableInstrsAVX512[][4] = {
// Two integer columns for 64-bit and 32-bit elements.
//PackedSingle        PackedDouble        PackedInt             PackedInt
{ X86::VMOVAPSZ128mr, X86::VMOVAPDZ128mr, X86::VMOVDQA64Z128mr, X86::VMOVDQA32Z128mr  },
{ X86::VMOVAPSZ128rm, X86::VMOVAPDZ128rm, X86::VMOVDQA64Z128rm, X86::VMOVDQA32Z128rm  },
{ X86::VMOVAPSZ128rr, X86::VMOVAPDZ128rr, X86::VMOVDQA64Z128rr, X86::VMOVDQA32Z128rr  },
{ X86::VMOVUPSZ128mr, X86::VMOVUPDZ128mr, X86::VMOVDQU64Z128mr, X86::VMOVDQU32Z128mr  },
{ X86::VMOVUPSZ128rm, X86::VMOVUPDZ128rm, X86::VMOVDQU64Z128rm, X86::VMOVDQU32Z128rm  },
{ X86::VMOVAPSZ256mr, X86::VMOVAPDZ256mr, X86::VMOVDQA64Z256mr, X86::VMOVDQA32Z256mr  },
{ X86::VMOVAPSZ256rm, X86::VMOVAPDZ256rm, X86::VMOVDQA64Z256rm, X86::VMOVDQA32Z256rm  },
{ X86::VMOVAPSZ256rr, X86::VMOVAPDZ256rr, X86::VMOVDQA64Z256rr, X86::VMOVDQA32Z256rr  },
{ X86::VMOVUPSZ256mr, X86::VMOVUPDZ256mr, X86::VMOVDQU64Z256mr, X86::VMOVDQU32Z256mr  },
{ X86::VMOVUPSZ256rm, X86::VMOVUPDZ256rm, X86::VMOVDQU64Z256rm, X86::VMOVDQU32Z256rm  },
{ X86::VMOVAPSZmr,    X86::VMOVAPDZmr,    X86::VMOVDQA64Zmr,    X86::VMOVDQA32Zmr     },
{ X86::VMOVAPSZrm,    X86::VMOVAPDZrm,    X86::VMOVDQA64Zrm,    X86::VMOVDQA32Zrm     },
{ X86::VMOVAPSZrr,    X86::VMOVAPDZrr,    X86::VMOVDQA64Zrr,    X86::VMOVDQA32Zrr     },
{ X86::VMOVUPSZmr,    X86::VMOVUPDZmr,    X86::VMOVDQU64Zmr,    X86::VMOVDQU32Zmr     },
{ X86::VMOVUPSZrm,    X86::VMOVUPDZrm,    X86::VMOVDQU64Zrm,    X86::VMOVDQU32Zrm     },
7152};

7154static const uint16_t ReplaceableInstrsAVX512DQ[][4] = {
// Two integer columns for 64-bit and 32-bit elements.
//PackedSingle        PackedDouble        PackedInt           PackedInt
{ X86::VANDNPSZ128rm, X86::VANDNPDZ128rm, X86::VPANDNQZ128rm, X86::VPANDNDZ128rm },
{ X86::VANDNPSZ128rr, X86::VANDNPDZ128rr, X86::VPANDNQZ128rr, X86::VPANDNDZ128rr },
{ X86::VANDPSZ128rm,  X86::VANDPDZ128rm,  X86::VPANDQZ128rm,  X86::VPANDDZ128rm  },
{ X86::VANDPSZ128rr,  X86::VANDPDZ128rr,  X86::VPANDQZ128rr,  X86::VPANDDZ128rr  },
{ X86::VORPSZ128rm,   X86::VORPDZ128rm,   X86::VPORQZ128rm,   X86::VPORDZ128rm   },
{ X86::VORPSZ128rr,   X86::VORPDZ128rr,   X86::VPORQZ128rr,   X86::VPORDZ128rr   },
{ X86::VXORPSZ128rm,  X86::VXORPDZ128rm,  X86::VPXORQZ128rm,  X86::VPXORDZ128rm  },
{ X86::VXORPSZ128rr,  X86::VXORPDZ128rr,  X86::VPXORQZ128rr,  X86::VPXORDZ128rr  },
{ X86::VANDNPSZ256rm, X86::VANDNPDZ256rm, X86::VPANDNQZ256rm, X86::VPANDNDZ256rm },
{ X86::VANDNPSZ256rr, X86::VANDNPDZ256rr, X86::VPANDNQZ256rr, X86::VPANDNDZ256rr },
{ X86::VANDPSZ256rm,  X86::VANDPDZ256rm,  X86::VPANDQZ256rm,  X86::VPANDDZ256rm  },
{ X86::VANDPSZ256rr,  X86::VANDPDZ256rr,  X86::VPANDQZ256rr,  X86::VPANDDZ256rr  },
{ X86::VORPSZ256rm,   X86::VORPDZ256rm,   X86::VPORQZ256rm,   X86::VPORDZ256rm   },
{ X86::VORPSZ256rr,   X86::VORPDZ256rr,   X86::VPORQZ256rr,   X86::VPORDZ256rr   },
{ X86::VXORPSZ256rm,  X86::VXORPDZ256rm,  X86::VPXORQZ256rm,  X86::VPXORDZ256rm  },
{ X86::VXORPSZ256rr,  X86::VXORPDZ256rr,  X86::VPXORQZ256rr,  X86::VPXORDZ256rr  },
{ X86::VANDNPSZrm,    X86::VANDNPDZrm,    X86::VPANDNQZrm,    X86::VPANDNDZrm    },
{ X86::VANDNPSZrr,    X86::VANDNPDZrr,    X86::VPANDNQZrr,    X86::VPANDNDZrr    },
{ X86::VANDPSZrm,     X86::VANDPDZrm,     X86::VPANDQZrm,     X86::VPANDDZrm     },
{ X86::VANDPSZrr,     X86::VANDPDZrr,     X86::VPANDQZrr,     X86::VPANDDZrr     },
{ X86::VORPSZrm,      X86::VORPDZrm,      X86::VPORQZrm,      X86::VPORDZrm      },
{ X86::VORPSZrr,      X86::VORPDZrr,      X86::VPORQZrr,      X86::VPORDZrr      },
{ X86::VXORPSZrm,     X86::VXORPDZrm,     X86::VPXORQZrm,     X86::VPXORDZrm     },
{ X86::VXORPSZrr,     X86::VXORPDZrr,     X86::VPXORQZrr,     X86::VPXORDZrr     },
7181};

7183static const uint16_t ReplaceableInstrsAVX512DQMasked[][4] = {
// Two integer columns for 64-bit and 32-bit elements.
//PackedSingle          PackedDouble
//PackedInt             PackedInt
{ X86::VANDNPSZ128rmk,  X86::VANDNPDZ128rmk,
  X86::VPANDNQZ128rmk,  X86::VPANDNDZ128rmk  },
{ X86::VANDNPSZ128rmkz, X86::VANDNPDZ128rmkz,
  X86::VPANDNQZ128rmkz, X86::VPANDNDZ128rmkz },
{ X86::VANDNPSZ128rrk,  X86::VANDNPDZ128rrk,
  X86::VPANDNQZ128rrk,  X86::VPANDNDZ128rrk  },
{ X86::VANDNPSZ128rrkz, X86::VANDNPDZ128rrkz,
  X86::VPANDNQZ128rrkz, X86::VPANDNDZ128rrkz },
{ X86::VANDPSZ128rmk,   X86::VANDPDZ128rmk,
  X86::VPANDQZ128rmk,   X86::VPANDDZ128rmk   },
{ X86::VANDPSZ128rmkz,  X86::VANDPDZ128rmkz,
  X86::VPANDQZ128rmkz,  X86::VPANDDZ128rmkz  },
{ X86::VANDPSZ128rrk,   X86::VANDPDZ128rrk,
  X86::VPANDQZ128rrk,   X86::VPANDDZ128rrk   },
{ X86::VANDPSZ128rrkz,  X86::VANDPDZ128rrkz,
  X86::VPANDQZ128rrkz,  X86::VPANDDZ128rrkz  },
{ X86::VORPSZ128rmk,    X86::VORPDZ128rmk,
  X86::VPORQZ128rmk,    X86::VPORDZ128rmk    },
{ X86::VORPSZ128rmkz,   X86::VORPDZ128rmkz,
  X86::VPORQZ128rmkz,   X86::VPORDZ128rmkz   },
{ X86::VORPSZ128rrk,    X86::VORPDZ128rrk,
  X86::VPORQZ128rrk,    X86::VPORDZ128rrk    },
{ X86::VORPSZ128rrkz,   X86::VORPDZ128rrkz,
  X86::VPORQZ128rrkz,   X86::VPORDZ128rrkz   },
{ X86::VXORPSZ128rmk,   X86::VXORPDZ128rmk,
  X86::VPXORQZ128rmk,   X86::VPXORDZ128rmk   },
{ X86::VXORPSZ128rmkz,  X86::VXORPDZ128rmkz,
  X86::VPXORQZ128rmkz,  X86::VPXORDZ128rmkz  },
{ X86::VXORPSZ128rrk,   X86::VXORPDZ128rrk,
  X86::VPXORQZ128rrk,   X86::VPXORDZ128rrk   },
{ X86::VXORPSZ128rrkz,  X86::VXORPDZ128rrkz,
  X86::VPXORQZ128rrkz,  X86::VPXORDZ128rrkz  },
{ X86::VANDNPSZ256rmk,  X86::VANDNPDZ256rmk,
  X86::VPANDNQZ256rmk,  X86::VPANDNDZ256rmk  },
{ X86::VANDNPSZ256rmkz, X86::VANDNPDZ256rmkz,
  X86::VPANDNQZ256rmkz, X86::VPANDNDZ256rmkz },
{ X86::VANDNPSZ256rrk,  X86::VANDNPDZ256rrk,
  X86::VPANDNQZ256rrk,  X86::VPANDNDZ256rrk  },
{ X86::VANDNPSZ256rrkz, X86::VANDNPDZ256rrkz,
  X86::VPANDNQZ256rrkz, X86::VPANDNDZ256rrkz },
{ X86::VANDPSZ256rmk,   X86::VANDPDZ256rmk,
  X86::VPANDQZ256rmk,   X86::VPANDDZ256rmk   },
{ X86::VANDPSZ256rmkz,  X86::VANDPDZ256rmkz,
  X86::VPANDQZ256rmkz,  X86::VPANDDZ256rmkz  },
{ X86::VANDPSZ256rrk,   X86::VANDPDZ256rrk,
  X86::VPANDQZ256rrk,   X86::VPANDDZ256rrk   },
{ X86::VANDPSZ256rrkz,  X86::VANDPDZ256rrkz,
  X86::VPANDQZ256rrkz,  X86::VPANDDZ256rrkz  },
{ X86::VORPSZ256rmk,    X86::VORPDZ256rmk,
  X86::VPORQZ256rmk,    X86::VPORDZ256rmk    },
{ X86::VORPSZ256rmkz,   X86::VORPDZ256rmkz,
  X86::VPORQZ256rmkz,   X86::VPORDZ256rmkz   },
{ X86::VORPSZ256rrk,    X86::VORPDZ256rrk,
  X86::VPORQZ256rrk,    X86::VPORDZ256rrk    },
{ X86::VORPSZ256rrkz,   X86::VORPDZ256rrkz,
  X86::VPORQZ256rrkz,   X86::VPORDZ256rrkz   },
{ X86::VXORPSZ256rmk,   X86::VXORPDZ256rmk,
  X86::VPXORQZ256rmk,   X86::VPXORDZ256rmk   },
{ X86::VXORPSZ256rmkz,  X86::VXORPDZ256rmkz,
  X86::VPXORQZ256rmkz,  X86::VPXORDZ256rmkz  },
{ X86::VXORPSZ256rrk,   X86::VXORPDZ256rrk,
  X86::VPXORQZ256rrk,   X86::VPXORDZ256rrk   },
{ X86::VXORPSZ256rrkz,  X86::VXORPDZ256rrkz,
  X86::VPXORQZ256rrkz,  X86::VPXORDZ256rrkz  },
{ X86::VANDNPSZrmk,     X86::VANDNPDZrmk,
  X86::VPANDNQZrmk,     X86::VPANDNDZrmk     },
{ X86::VANDNPSZrmkz,    X86::VANDNPDZrmkz,
  X86::VPANDNQZrmkz,    X86::VPANDNDZrmkz    },
{ X86::VANDNPSZrrk,     X86::VANDNPDZrrk,
  X86::VPANDNQZrrk,     X86::VPANDNDZrrk     },
{ X86::VANDNPSZrrkz,    X86::VANDNPDZrrkz,
  X86::VPANDNQZrrkz,    X86::VPANDNDZrrkz    },
{ X86::VANDPSZrmk,      X86::VANDPDZrmk,
  X86::VPANDQZrmk,      X86::VPANDDZrmk      },
{ X86::VANDPSZrmkz,     X86::VANDPDZrmkz,
  X86::VPANDQZrmkz,     X86::VPANDDZrmkz     },
{ X86::VANDPSZrrk,      X86::VANDPDZrrk,
  X86::VPANDQZrrk,      X86::VPANDDZrrk      },
{ X86::VANDPSZrrkz,     X86::VANDPDZrrkz,
  X86::VPANDQZrrkz,     X86::VPANDDZrrkz     },
{ X86::VORPSZrmk,       X86::VORPDZrmk,
  X86::VPORQZrmk,       X86::VPORDZrmk       },
{ X86::VORPSZrmkz,      X86::VORPDZrmkz,
  X86::VPORQZrmkz,      X86::VPORDZrmkz      },
{ X86::VORPSZrrk,       X86::VORPDZrrk,
  X86::VPORQZrrk,       X86::VPORDZrrk       },
{ X86::VORPSZrrkz,      X86::VORPDZrrkz,
  X86::VPORQZrrkz,      X86::VPORDZrrkz      },
{ X86::VXORPSZrmk,      X86::VXORPDZrmk,
  X86::VPXORQZrmk,      X86::VPXORDZrmk      },
{ X86::VXORPSZrmkz,     X86::VXORPDZrmkz,
  X86::VPXORQZrmkz,     X86::VPXORDZrmkz     },
{ X86::VXORPSZrrk,      X86::VXORPDZrrk,
  X86::VPXORQZrrk,      X86::VPXORDZrrk      },
{ X86::VXORPSZrrkz,     X86::VXORPDZrrkz,
  X86::VPXORQZrrkz,     X86::VPXORDZrrkz     },
// Broadcast loads can be handled the same as masked operations to avoid
// changing element size.
{ X86::VANDNPSZ128rmb,  X86::VANDNPDZ128rmb,
  X86::VPANDNQZ128rmb,  X86::VPANDNDZ128rmb  },
{ X86::VANDPSZ128rmb,   X86::VANDPDZ128rmb,
  X86::VPANDQZ128rmb,   X86::VPANDDZ128rmb   },
{ X86::VORPSZ128rmb,    X86::VORPDZ128rmb,
  X86::VPORQZ128rmb,    X86::VPORDZ128rmb    },
{ X86::VXORPSZ128rmb,   X86::VXORPDZ128rmb,
  X86::VPXORQZ128rmb,   X86::VPXORDZ128rmb   },
{ X86::VANDNPSZ256rmb,  X86::VANDNPDZ256rmb,
  X86::VPANDNQZ256rmb,  X86::VPANDNDZ256rmb  },
{ X86::VANDPSZ256rmb,   X86::VANDPDZ256rmb,
  X86::VPANDQZ256rmb,   X86::VPANDDZ256rmb   },
{ X86::VORPSZ256rmb,    X86::VORPDZ256rmb,
  X86::VPORQZ256rmb,    X86::VPORDZ256rmb    },
{ X86::VXORPSZ256rmb,   X86::VXORPDZ256rmb,
  X86::VPXORQZ256rmb,   X86::VPXORDZ256rmb   },
{ X86::VANDNPSZrmb,     X86::VANDNPDZrmb,
  X86::VPANDNQZrmb,     X86::VPANDNDZrmb     },
{ X86::VANDPSZrmb,      X86::VANDPDZrmb,
  X86::VPANDQZrmb,      X86::VPANDDZrmb      },
{ X86::VANDPSZrmb,      X86::VANDPDZrmb,
  X86::VPANDQZrmb,      X86::VPANDDZrmb      },
{ X86::VORPSZrmb,       X86::VORPDZrmb,
  X86::VPORQZrmb,       X86::VPORDZrmb       },
{ X86::VXORPSZrmb,      X86::VXORPDZrmb,
  X86::VPXORQZrmb,      X86::VPXORDZrmb      },
{ X86::VANDNPSZ128rmbk, X86::VANDNPDZ128rmbk,
  X86::VPANDNQZ128rmbk, X86::VPANDNDZ128rmbk },
{ X86::VANDPSZ128rmbk,  X86::VANDPDZ128rmbk,
  X86::VPANDQZ128rmbk,  X86::VPANDDZ128rmbk  },
{ X86::VORPSZ128rmbk,   X86::VORPDZ128rmbk,
  X86::VPORQZ128rmbk,   X86::VPORDZ128rmbk   },
{ X86::VXORPSZ128rmbk,  X86::VXORPDZ128rmbk,
  X86::VPXORQZ128rmbk,  X86::VPXORDZ128rmbk  },
{ X86::VANDNPSZ256rmbk, X86::VANDNPDZ256rmbk,
  X86::VPANDNQZ256rmbk, X86::VPANDNDZ256rmbk },
{ X86::VANDPSZ256rmbk,  X86::VANDPDZ256rmbk,
  X86::VPANDQZ256rmbk,  X86::VPANDDZ256rmbk  },
{ X86::VORPSZ256rmbk,   X86::VORPDZ256rmbk,
  X86::VPORQZ256rmbk,   X86::VPORDZ256rmbk   },
{ X86::VXORPSZ256rmbk,  X86::VXORPDZ256rmbk,
  X86::VPXORQZ256rmbk,  X86::VPXORDZ256rmbk  },
{ X86::VANDNPSZrmbk,    X86::VANDNPDZrmbk,
  X86::VPANDNQZrmbk,    X86::VPANDNDZrmbk    },
{ X86::VANDPSZrmbk,     X86::VANDPDZrmbk,
  X86::VPANDQZrmbk,     X86::VPANDDZrmbk     },
{ X86::VANDPSZrmbk,     X86::VANDPDZrmbk,
  X86::VPANDQZrmbk,     X86::VPANDDZrmbk     },
{ X86::VORPSZrmbk,      X86::VORPDZrmbk,
  X86::VPORQZrmbk,      X86::VPORDZrmbk      },
{ X86::VXORPSZrmbk,     X86::VXORPDZrmbk,
  X86::VPXORQZrmbk,     X86::VPXORDZrmbk     },
{ X86::VANDNPSZ128rmbkz,X86::VANDNPDZ128rmbkz,
  X86::VPANDNQZ128rmbkz,X86::VPANDNDZ128rmbkz},
{ X86::VANDPSZ128rmbkz, X86::VANDPDZ128rmbkz,
  X86::VPANDQZ128rmbkz, X86::VPANDDZ128rmbkz },
{ X86::VORPSZ128rmbkz,  X86::VORPDZ128rmbkz,
  X86::VPORQZ128rmbkz,  X86::VPORDZ128rmbkz  },
{ X86::VXORPSZ128rmbkz, X86::VXORPDZ128rmbkz,
  X86::VPXORQZ128rmbkz, X86::VPXORDZ128rmbkz },
{ X86::VANDNPSZ256rmbkz,X86::VANDNPDZ256rmbkz,
  X86::VPANDNQZ256rmbkz,X86::VPANDNDZ256rmbkz},
{ X86::VANDPSZ256rmbkz, X86::VANDPDZ256rmbkz,
  X86::VPANDQZ256rmbkz, X86::VPANDDZ256rmbkz },
{ X86::VORPSZ256rmbkz,  X86::VORPDZ256rmbkz,
  X86::VPORQZ256rmbkz,  X86::VPORDZ256rmbkz  },
{ X86::VXORPSZ256rmbkz, X86::VXORPDZ256rmbkz,
  X86::VPXORQZ256rmbkz, X86::VPXORDZ256rmbkz },
{ X86::VANDNPSZrmbkz,   X86::VANDNPDZrmbkz,
  X86::VPANDNQZrmbkz,   X86::VPANDNDZrmbkz   },
{ X86::VANDPSZrmbkz,    X86::VANDPDZrmbkz,
  X86::VPANDQZrmbkz,    X86::VPANDDZrmbkz    },
{ X86::VANDPSZrmbkz,    X86::VANDPDZrmbkz,
  X86::VPANDQZrmbkz,    X86::VPANDDZrmbkz    },
{ X86::VORPSZrmbkz,     X86::VORPDZrmbkz,
  X86::VPORQZrmbkz,     X86::VPORDZrmbkz     },
{ X86::VXORPSZrmbkz,    X86::VXORPDZrmbkz,
  X86::VPXORQZrmbkz,    X86::VPXORDZrmbkz    },
7363};

7365// NOTE: These should only be used by the custom domain methods.
7366static const uint16_t ReplaceableBlendInstrs[][3] = {
//PackedSingle             PackedDouble             PackedInt
{ X86::BLENDPSrmi,         X86::BLENDPDrmi,         X86::PBLENDWrmi   },
{ X86::BLENDPSrri,         X86::BLENDPDrri,         X86::PBLENDWrri   },
{ X86::VBLENDPSrmi,        X86::VBLENDPDrmi,        X86::VPBLENDWrmi  },
{ X86::VBLENDPSrri,        X86::VBLENDPDrri,        X86::VPBLENDWrri  },
{ X86::VBLENDPSYrmi,       X86::VBLENDPDYrmi,       X86::VPBLENDWYrmi },
{ X86::VBLENDPSYrri,       X86::VBLENDPDYrri,       X86::VPBLENDWYrri },
7374};
7375static const uint16_t ReplaceableBlendAVX2Instrs[][3] = {
//PackedSingle             PackedDouble             PackedInt
{ X86::VBLENDPSrmi,        X86::VBLENDPDrmi,        X86::VPBLENDDrmi  },
{ X86::VBLENDPSrri,        X86::VBLENDPDrri,        X86::VPBLENDDrri  },
{ X86::VBLENDPSYrmi,       X86::VBLENDPDYrmi,       X86::VPBLENDDYrmi },
{ X86::VBLENDPSYrri,       X86::VBLENDPDYrri,       X86::VPBLENDDYrri },
7381};

7383// Special table for changing EVEX logic instructions to VEX.
7384// TODO: Should we run EVEX->VEX earlier?
7385static const uint16_t ReplaceableCustomAVX512LogicInstrs[][4] = {
// Two integer columns for 64-bit and 32-bit elements.
//PackedSingle     PackedDouble     PackedInt           PackedInt
{ X86::VANDNPSrm,  X86::VANDNPDrm,  X86::VPANDNQZ128rm, X86::VPANDNDZ128rm },
{ X86::VANDNPSrr,  X86::VANDNPDrr,  X86::VPANDNQZ128rr, X86::VPANDNDZ128rr },
{ X86::VANDPSrm,   X86::VANDPDrm,   X86::VPANDQZ128rm,  X86::VPANDDZ128rm  },
{ X86::VANDPSrr,   X86::VANDPDrr,   X86::VPANDQZ128rr,  X86::VPANDDZ128rr  },
{ X86::VORPSrm,    X86::VORPDrm,    X86::VPORQZ128rm,   X86::VPORDZ128rm   },
{ X86::VORPSrr,    X86::VORPDrr,    X86::VPORQZ128rr,   X86::VPORDZ128rr   },
{ X86::VXORPSrm,   X86::VXORPDrm,   X86::VPXORQZ128rm,  X86::VPXORDZ128rm  },
{ X86::VXORPSrr,   X86::VXORPDrr,   X86::VPXORQZ128rr,  X86::VPXORDZ128rr  },
{ X86::VANDNPSYrm, X86::VANDNPDYrm, X86::VPANDNQZ256rm, X86::VPANDNDZ256rm },
{ X86::VANDNPSYrr, X86::VANDNPDYrr, X86::VPANDNQZ256rr, X86::VPANDNDZ256rr },
{ X86::VANDPSYrm,  X86::VANDPDYrm,  X86::VPANDQZ256rm,  X86::VPANDDZ256rm  },
{ X86::VANDPSYrr,  X86::VANDPDYrr,  X86::VPANDQZ256rr,  X86::VPANDDZ256rr  },
{ X86::VORPSYrm,   X86::VORPDYrm,   X86::VPORQZ256rm,   X86::VPORDZ256rm   },
{ X86::VORPSYrr,   X86::VORPDYrr,   X86::VPORQZ256rr,   X86::VPORDZ256rr   },
{ X86::VXORPSYrm,  X86::VXORPDYrm,  X86::VPXORQZ256rm,  X86::VPXORDZ256rm  },
{ X86::VXORPSYrr,  X86::VXORPDYrr,  X86::VPXORQZ256rr,  X86::VPXORDZ256rr  },
7404};

7406// FIXME: Some shuffle and unpack instructions have equivalents in different
7407// domains, but they require a bit more work than just switching opcodes.

7409static const uint16_t *lookup(unsigned opcode, unsigned domain,
                            ArrayRef<uint16_t[3]> Table) {
for (const uint16_t (&Row)[3] : Table)
  if (Row[domain-1] == opcode)
    return Row;
return nullptr;
7415}

7417static const uint16_t *lookupAVX512(unsigned opcode, unsigned domain,
                                  ArrayRef<uint16_t[4]> Table) {
// If this is the integer domain make sure to check both integer columns.
for (const uint16_t (&Row)[4] : Table)
  if (Row[domain-1] == opcode || (domain == 3 && Row[3] == opcode))
    return Row;
return nullptr;
7424}

7426// Helper to attempt to widen/narrow blend masks.
7427static bool AdjustBlendMask(unsigned OldMask, unsigned OldWidth,
                          unsigned NewWidth, unsigned *pNewMask = nullptr) {
assert(((OldWidth % NewWidth) == 0 || (NewWidth % OldWidth) == 0) &&((void)0)
       "Illegal blend mask scale")((void)0);
unsigned NewMask = 0;

if ((OldWidth % NewWidth) == 0) {
  unsigned Scale = OldWidth / NewWidth;
  unsigned SubMask = (1u << Scale) - 1;
  for (unsigned i = 0; i != NewWidth; ++i) {
    unsigned Sub = (OldMask >> (i * Scale)) & SubMask;
    if (Sub == SubMask)
      NewMask |= (1u << i);
    else if (Sub != 0x0)
      return false;
  }
} else {
  unsigned Scale = NewWidth / OldWidth;
  unsigned SubMask = (1u << Scale) - 1;
  for (unsigned i = 0; i != OldWidth; ++i) {
    if (OldMask & (1 << i)) {
      NewMask |= (SubMask << (i * Scale));
    }
  }
}

if (pNewMask)
  *pNewMask = NewMask;
return true;
7456}

7458uint16_t X86InstrInfo::getExecutionDomainCustom(const MachineInstr &MI) const {
unsigned Opcode = MI.getOpcode();
unsigned NumOperands = MI.getDesc().getNumOperands();

auto GetBlendDomains = [&](unsigned ImmWidth, bool Is256) {
  uint16_t validDomains = 0;
  if (MI.getOperand(NumOperands - 1).isImm()) {
    unsigned Imm = MI.getOperand(NumOperands - 1).getImm();
    if (AdjustBlendMask(Imm, ImmWidth, Is256 ? 8 : 4))
      validDomains |= 0x2; // PackedSingle
    if (AdjustBlendMask(Imm, ImmWidth, Is256 ? 4 : 2))
      validDomains |= 0x4; // PackedDouble
    if (!Is256 || Subtarget.hasAVX2())
      validDomains |= 0x8; // PackedInt
  }
  return validDomains;
};

switch (Opcode) {
case X86::BLENDPDrmi:
case X86::BLENDPDrri:
case X86::VBLENDPDrmi:
case X86::VBLENDPDrri:
  return GetBlendDomains(2, false);
case X86::VBLENDPDYrmi:
case X86::VBLENDPDYrri:
  return GetBlendDomains(4, true);
case X86::BLENDPSrmi:
case X86::BLENDPSrri:
case X86::VBLENDPSrmi:
case X86::VBLENDPSrri:
case X86::VPBLENDDrmi:
case X86::VPBLENDDrri:
  return GetBlendDomains(4, false);
case X86::VBLENDPSYrmi:
case X86::VBLENDPSYrri:
case X86::VPBLENDDYrmi:
case X86::VPBLENDDYrri:
  return GetBlendDomains(8, true);
case X86::PBLENDWrmi:
case X86::PBLENDWrri:
case X86::VPBLENDWrmi:
case X86::VPBLENDWrri:
// Treat VPBLENDWY as a 128-bit vector as it repeats the lo/hi masks.
case X86::VPBLENDWYrmi:
case X86::VPBLENDWYrri:
  return GetBlendDomains(8, false);
case X86::VPANDDZ128rr:  case X86::VPANDDZ128rm:
case X86::VPANDDZ256rr:  case X86::VPANDDZ256rm:
case X86::VPANDQZ128rr:  case X86::VPANDQZ128rm:
case X86::VPANDQZ256rr:  case X86::VPANDQZ256rm:
case X86::VPANDNDZ128rr: case X86::VPANDNDZ128rm:
case X86::VPANDNDZ256rr: case X86::VPANDNDZ256rm:
case X86::VPANDNQZ128rr: case X86::VPANDNQZ128rm:
case X86::VPANDNQZ256rr: case X86::VPANDNQZ256rm:
case X86::VPORDZ128rr:   case X86::VPORDZ128rm:
case X86::VPORDZ256rr:   case X86::VPORDZ256rm:
case X86::VPORQZ128rr:   case X86::VPORQZ128rm:
case X86::VPORQZ256rr:   case X86::VPORQZ256rm:
case X86::VPXORDZ128rr:  case X86::VPXORDZ128rm:
case X86::VPXORDZ256rr:  case X86::VPXORDZ256rm:
case X86::VPXORQZ128rr:  case X86::VPXORQZ128rm:
case X86::VPXORQZ256rr:  case X86::VPXORQZ256rm:
  // If we don't have DQI see if we can still switch from an EVEX integer
  // instruction to a VEX floating point instruction.
  if (Subtarget.hasDQI())
    return 0;

  if (RI.getEncodingValue(MI.getOperand(0).getReg()) >= 16)
    return 0;
  if (RI.getEncodingValue(MI.getOperand(1).getReg()) >= 16)
    return 0;
  // Register forms will have 3 operands. Memory form will have more.
  if (NumOperands == 3 &&
      RI.getEncodingValue(MI.getOperand(2).getReg()) >= 16)
    return 0;

  // All domains are valid.
  return 0xe;
case X86::MOVHLPSrr:
  // We can swap domains when both inputs are the same register.
  // FIXME: This doesn't catch all the cases we would like. If the input
  // register isn't KILLed by the instruction, the two address instruction
  // pass puts a COPY on one input. The other input uses the original
  // register. This prevents the same physical register from being used by
  // both inputs.
  if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg() &&
      MI.getOperand(0).getSubReg() == 0 &&
      MI.getOperand(1).getSubReg() == 0 &&
      MI.getOperand(2).getSubReg() == 0)
    return 0x6;
  return 0;
case X86::SHUFPDrri:
  return 0x6;
}
return 0;
7554}

7556bool X86InstrInfo::setExecutionDomainCustom(MachineInstr &MI,
                                          unsigned Domain) const {
assert(Domain > 0 && Domain < 4 && "Invalid execution domain")((void)0);
uint16_t dom = (MI.getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
assert(dom && "Not an SSE instruction")((void)0);

unsigned Opcode = MI.getOpcode();
unsigned NumOperands = MI.getDesc().getNumOperands();

auto SetBlendDomain = [&](unsigned ImmWidth, bool Is256) {
  if (MI.getOperand(NumOperands - 1).isImm()) {
    unsigned Imm = MI.getOperand(NumOperands - 1).getImm() & 255;
    Imm = (ImmWidth == 16 ? ((Imm << 8) | Imm) : Imm);
    unsigned NewImm = Imm;

    const uint16_t *table = lookup(Opcode, dom, ReplaceableBlendInstrs);
    if (!table)
      table = lookup(Opcode, dom, ReplaceableBlendAVX2Instrs);

    if (Domain == 1) { // PackedSingle
      AdjustBlendMask(Imm, ImmWidth, Is256 ? 8 : 4, &NewImm);
    } else if (Domain == 2) { // PackedDouble
      AdjustBlendMask(Imm, ImmWidth, Is256 ? 4 : 2, &NewImm);
    } else if (Domain == 3) { // PackedInt
      if (Subtarget.hasAVX2()) {
        // If we are already VPBLENDW use that, else use VPBLENDD.
        if ((ImmWidth / (Is256 ? 2 : 1)) != 8) {
          table = lookup(Opcode, dom, ReplaceableBlendAVX2Instrs);
          AdjustBlendMask(Imm, ImmWidth, Is256 ? 8 : 4, &NewImm);
        }
      } else {
        assert(!Is256 && "128-bit vector expected")((void)0);
        AdjustBlendMask(Imm, ImmWidth, 8, &NewImm);
      }
    }

    assert(table && table[Domain - 1] && "Unknown domain op")((void)0);
    MI.setDesc(get(table[Domain - 1]));
    MI.getOperand(NumOperands - 1).setImm(NewImm & 255);
  }
  return true;
};

switch (Opcode) {
2
←
Control jumps to 'case UNPCKHPDrr:'  at line 7658→
case X86::BLENDPDrmi:
case X86::BLENDPDrri:
case X86::VBLENDPDrmi:
case X86::VBLENDPDrri:
  return SetBlendDomain(2, false);
case X86::VBLENDPDYrmi:
case X86::VBLENDPDYrri:
  return SetBlendDomain(4, true);
case X86::BLENDPSrmi:
case X86::BLENDPSrri:
case X86::VBLENDPSrmi:
case X86::VBLENDPSrri:
case X86::VPBLENDDrmi:
case X86::VPBLENDDrri:
  return SetBlendDomain(4, false);
case X86::VBLENDPSYrmi:
case X86::VBLENDPSYrri:
case X86::VPBLENDDYrmi:
case X86::VPBLENDDYrri:
  return SetBlendDomain(8, true);
case X86::PBLENDWrmi:
case X86::PBLENDWrri:
case X86::VPBLENDWrmi:
case X86::VPBLENDWrri:
  return SetBlendDomain(8, false);
case X86::VPBLENDWYrmi:
case X86::VPBLENDWYrri:
  return SetBlendDomain(16, true);
case X86::VPANDDZ128rr:  case X86::VPANDDZ128rm:
case X86::VPANDDZ256rr:  case X86::VPANDDZ256rm:
case X86::VPANDQZ128rr:  case X86::VPANDQZ128rm:
case X86::VPANDQZ256rr:  case X86::VPANDQZ256rm:
case X86::VPANDNDZ128rr: case X86::VPANDNDZ128rm:
case X86::VPANDNDZ256rr: case X86::VPANDNDZ256rm:
case X86::VPANDNQZ128rr: case X86::VPANDNQZ128rm:
case X86::VPANDNQZ256rr: case X86::VPANDNQZ256rm:
case X86::VPORDZ128rr:   case X86::VPORDZ128rm:
case X86::VPORDZ256rr:   case X86::VPORDZ256rm:
case X86::VPORQZ128rr:   case X86::VPORQZ128rm:
case X86::VPORQZ256rr:   case X86::VPORQZ256rm:
case X86::VPXORDZ128rr:  case X86::VPXORDZ128rm:
case X86::VPXORDZ256rr:  case X86::VPXORDZ256rm:
case X86::VPXORQZ128rr:  case X86::VPXORQZ128rm:
case X86::VPXORQZ256rr:  case X86::VPXORQZ256rm: {
  // Without DQI, convert EVEX instructions to VEX instructions.
  if (Subtarget.hasDQI())
    return false;

  const uint16_t *table = lookupAVX512(MI.getOpcode(), dom,
                                       ReplaceableCustomAVX512LogicInstrs);
  assert(table && "Instruction not found in table?")((void)0);
  // Don't change integer Q instructions to D instructions and
  // use D intructions if we started with a PS instruction.
  if (Domain == 3 && (dom == 1 || table[3] == MI.getOpcode()))
    Domain = 4;
  MI.setDesc(get(table[Domain - 1]));
  return true;
}
case X86::UNPCKHPDrr:
case X86::MOVHLPSrr:
  // We just need to commute the instruction which will switch the domains.
  if (Domain != dom && Domain != 3 &&
3
←
Assuming 'Domain' is equal to 'dom'→
4
←
Taking false branch→
      MI.getOperand(1).getReg() == MI.getOperand(2).getReg() &&
      MI.getOperand(0).getSubReg() == 0 &&
      MI.getOperand(1).getSubReg() == 0 &&
      MI.getOperand(2).getSubReg() == 0) {
    commuteInstruction(MI, false);
    return true;
  }
  // We must always return true for MOVHLPSrr.
  if (Opcode4.1
'Opcode' is not equal to MOVHLPSrr
 == X86::MOVHLPSrr)
5
←
Taking false branch→
    return true;
  break;
6
←
 Execution continues on line 7685→
case X86::SHUFPDrri: {
  if (Domain == 1) {
    unsigned Imm = MI.getOperand(3).getImm();
    unsigned NewImm = 0x44;
    if (Imm & 1) NewImm |= 0x0a;
    if (Imm & 2) NewImm |= 0xa0;
    MI.getOperand(3).setImm(NewImm);
    MI.setDesc(get(X86::SHUFPSrri));
  }
  return true;
}
}
return false;
7
←
Returning zero, which participates in a condition later→
7686}

7688std::pair<uint16_t, uint16_t>
7689X86InstrInfo::getExecutionDomain(const MachineInstr &MI) const {
uint16_t domain = (MI.getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
unsigned opcode = MI.getOpcode();
uint16_t validDomains = 0;
if (domain) {
  // Attempt to match for custom instructions.
  validDomains = getExecutionDomainCustom(MI);
  if (validDomains)
    return std::make_pair(domain, validDomains);

  if (lookup(opcode, domain, ReplaceableInstrs)) {
    validDomains = 0xe;
  } else if (lookup(opcode, domain, ReplaceableInstrsAVX2)) {
    validDomains = Subtarget.hasAVX2() ? 0xe : 0x6;
  } else if (lookup(opcode, domain, ReplaceableInstrsFP)) {
    validDomains = 0x6;
  } else if (lookup(opcode, domain, ReplaceableInstrsAVX2InsertExtract)) {
    // Insert/extract instructions should only effect domain if AVX2
    // is enabled.
    if (!Subtarget.hasAVX2())
      return std::make_pair(0, 0);
    validDomains = 0xe;
  } else if (lookupAVX512(opcode, domain, ReplaceableInstrsAVX512)) {
    validDomains = 0xe;
  } else if (Subtarget.hasDQI() && lookupAVX512(opcode, domain,
                                                ReplaceableInstrsAVX512DQ)) {
    validDomains = 0xe;
  } else if (Subtarget.hasDQI()) {
    if (const uint16_t *table = lookupAVX512(opcode, domain,
                                           ReplaceableInstrsAVX512DQMasked)) {
      if (domain == 1 || (domain == 3 && table[3] == opcode))
        validDomains = 0xa;
      else
        validDomains = 0xc;
    }
  }
}
return std::make_pair(domain, validDomains);
7727}

7729void X86InstrInfo::setExecutionDomain(MachineInstr &MI, unsigned Domain) const {
assert(Domain>0 && Domain<4 && "Invalid execution domain")((void)0);
uint16_t dom = (MI.getDesc().TSFlags >> X86II::SSEDomainShift) & 3;
assert(dom && "Not an SSE instruction")((void)0);

// Attempt to match for custom instructions.
if (setExecutionDomainCustom(MI, Domain))
1
Calling 'X86InstrInfo::setExecutionDomainCustom'→
8
←
Returning from 'X86InstrInfo::setExecutionDomainCustom'→
9
←
Taking false branch→
  return;

const uint16_t *table = lookup(MI.getOpcode(), dom, ReplaceableInstrs);
if (!table) { // try the other table
10
←
Assuming 'table' is null→
11
←
Taking true branch→
  assert((Subtarget.hasAVX2() || Domain < 3) &&((void)0)
         "256-bit vector operations only available in AVX2")((void)0);
  table = lookup(MI.getOpcode(), dom, ReplaceableInstrsAVX2);
}
if (!table) { // try the FP table
12
←
Assuming 'table' is null→
13
←
Taking true branch→
  table = lookup(MI.getOpcode(), dom, ReplaceableInstrsFP);
  assert((!table || Domain < 3) &&((void)0)
         "Can only select PackedSingle or PackedDouble")((void)0);
}
if (!table) { // try the other table
14
←
Assuming 'table' is null→
15
←
Taking true branch→
  assert(Subtarget.hasAVX2() &&((void)0)
         "256-bit insert/extract only available in AVX2")((void)0);
  table = lookup(MI.getOpcode(), dom, ReplaceableInstrsAVX2InsertExtract);
}
if (!table) { // try the AVX512 table
16
←
Assuming 'table' is null→
17
←
Taking true branch→
  assert(Subtarget.hasAVX512() && "Requires AVX-512")((void)0);
  table = lookupAVX512(MI.getOpcode(), dom, ReplaceableInstrsAVX512);
  // Don't change integer Q instructions to D instructions.
  if (table && Domain == 3 && table[3] == MI.getOpcode())
18
←
Assuming 'table' is null→
    Domain = 4;
}
if (!table18.1
'table' is null
) { // try the AVX512DQ table
19
←
Taking true branch→
  assert((Subtarget.hasDQI() || Domain >= 3) && "Requires AVX-512DQ")((void)0);
  table = lookupAVX512(MI.getOpcode(), dom, ReplaceableInstrsAVX512DQ);
  // Don't change integer Q instructions to D instructions and
  // use D instructions if we started with a PS instruction.
  if (table && Domain == 3 && (dom == 1 || table[3] == MI.getOpcode()))
20
←
Assuming 'table' is null→
    Domain = 4;
}
if (!table20.1
'table' is null
) { // try the AVX512DQMasked table
21
←
Taking true branch→
  assert((Subtarget.hasDQI() || Domain >= 3) && "Requires AVX-512DQ")((void)0);
  table = lookupAVX512(MI.getOpcode(), dom, ReplaceableInstrsAVX512DQMasked);
22
←
Value assigned to 'table'→
  if (table && Domain == 3 && (dom == 1 || table[3] == MI.getOpcode()))
23
←
Assuming 'table' is null→
    Domain = 4;
}
assert(table && "Cannot change domain")((void)0);
MI.setDesc(get(table[Domain - 1]));
24
←
Array access (from variable 'table') results in a null pointer dereference
7777}

7779/// Return the noop instruction to use for a noop.
7780MCInst X86InstrInfo::getNop() const {
MCInst Nop;
Nop.setOpcode(X86::NOOP);
return Nop;
7784}

7786bool X86InstrInfo::isHighLatencyDef(int opc) const {
switch (opc) {
default: return false;
case X86::DIVPDrm:
case X86::DIVPDrr:
case X86::DIVPSrm:
case X86::DIVPSrr:
case X86::DIVSDrm:
case X86::DIVSDrm_Int:
case X86::DIVSDrr:
case X86::DIVSDrr_Int:
case X86::DIVSSrm:
case X86::DIVSSrm_Int:
case X86::DIVSSrr:
case X86::DIVSSrr_Int:
case X86::SQRTPDm:
case X86::SQRTPDr:
case X86::SQRTPSm:
case X86::SQRTPSr:
case X86::SQRTSDm:
case X86::SQRTSDm_Int:
case X86::SQRTSDr:
case X86::SQRTSDr_Int:
case X86::SQRTSSm:
case X86::SQRTSSm_Int:
case X86::SQRTSSr:
case X86::SQRTSSr_Int:
// AVX instructions with high latency
case X86::VDIVPDrm:
case X86::VDIVPDrr:
case X86::VDIVPDYrm:
case X86::VDIVPDYrr:
case X86::VDIVPSrm:
case X86::VDIVPSrr:
case X86::VDIVPSYrm:
case X86::VDIVPSYrr:
case X86::VDIVSDrm:
case X86::VDIVSDrm_Int:
case X86::VDIVSDrr:
case X86::VDIVSDrr_Int:
case X86::VDIVSSrm:
case X86::VDIVSSrm_Int:
case X86::VDIVSSrr:
case X86::VDIVSSrr_Int:
case X86::VSQRTPDm:
case X86::VSQRTPDr:
case X86::VSQRTPDYm:
case X86::VSQRTPDYr:
case X86::VSQRTPSm:
case X86::VSQRTPSr:
case X86::VSQRTPSYm:
case X86::VSQRTPSYr:
case X86::VSQRTSDm:
case X86::VSQRTSDm_Int:
case X86::VSQRTSDr:
case X86::VSQRTSDr_Int:
case X86::VSQRTSSm:
case X86::VSQRTSSm_Int:
case X86::VSQRTSSr:
case X86::VSQRTSSr_Int:
// AVX512 instructions with high latency
case X86::VDIVPDZ128rm:
case X86::VDIVPDZ128rmb:
case X86::VDIVPDZ128rmbk:
case X86::VDIVPDZ128rmbkz:
case X86::VDIVPDZ128rmk:
case X86::VDIVPDZ128rmkz:
case X86::VDIVPDZ128rr:
case X86::VDIVPDZ128rrk:
case X86::VDIVPDZ128rrkz:
case X86::VDIVPDZ256rm:
case X86::VDIVPDZ256rmb:
case X86::VDIVPDZ256rmbk:
case X86::VDIVPDZ256rmbkz:
case X86::VDIVPDZ256rmk:
case X86::VDIVPDZ256rmkz:
case X86::VDIVPDZ256rr:
case X86::VDIVPDZ256rrk:
case X86::VDIVPDZ256rrkz:
case X86::VDIVPDZrrb:
case X86::VDIVPDZrrbk:
case X86::VDIVPDZrrbkz:
case X86::VDIVPDZrm:
case X86::VDIVPDZrmb:
case X86::VDIVPDZrmbk:
case X86::VDIVPDZrmbkz:
case X86::VDIVPDZrmk:
case X86::VDIVPDZrmkz:
case X86::VDIVPDZrr:
case X86::VDIVPDZrrk:
case X86::VDIVPDZrrkz:
case X86::VDIVPSZ128rm:
case X86::VDIVPSZ128rmb:
case X86::VDIVPSZ128rmbk:
case X86::VDIVPSZ128rmbkz:
case X86::VDIVPSZ128rmk:
case X86::VDIVPSZ128rmkz:
case X86::VDIVPSZ128rr:
case X86::VDIVPSZ128rrk:
case X86::VDIVPSZ128rrkz:
case X86::VDIVPSZ256rm:
case X86::VDIVPSZ256rmb:
case X86::VDIVPSZ256rmbk:
case X86::VDIVPSZ256rmbkz:
case X86::VDIVPSZ256rmk:
case X86::VDIVPSZ256rmkz:
case X86::VDIVPSZ256rr:
case X86::VDIVPSZ256rrk:
case X86::VDIVPSZ256rrkz:
case X86::VDIVPSZrrb:
case X86::VDIVPSZrrbk:
case X86::VDIVPSZrrbkz:
case X86::VDIVPSZrm:
case X86::VDIVPSZrmb:
case X86::VDIVPSZrmbk:
case X86::VDIVPSZrmbkz:
case X86::VDIVPSZrmk:
case X86::VDIVPSZrmkz:
case X86::VDIVPSZrr:
case X86::VDIVPSZrrk:
case X86::VDIVPSZrrkz:
case X86::VDIVSDZrm:
case X86::VDIVSDZrr:
case X86::VDIVSDZrm_Int:
case X86::VDIVSDZrm_Intk:
case X86::VDIVSDZrm_Intkz:
case X86::VDIVSDZrr_Int:
case X86::VDIVSDZrr_Intk:
case X86::VDIVSDZrr_Intkz:
case X86::VDIVSDZrrb_Int:
case X86::VDIVSDZrrb_Intk:
case X86::VDIVSDZrrb_Intkz:
case X86::VDIVSSZrm:
case X86::VDIVSSZrr:
case X86::VDIVSSZrm_Int:
case X86::VDIVSSZrm_Intk:
case X86::VDIVSSZrm_Intkz:
case X86::VDIVSSZrr_Int:
case X86::VDIVSSZrr_Intk:
case X86::VDIVSSZrr_Intkz:
case X86::VDIVSSZrrb_Int:
case X86::VDIVSSZrrb_Intk:
case X86::VDIVSSZrrb_Intkz:
case X86::VSQRTPDZ128m:
case X86::VSQRTPDZ128mb:
case X86::VSQRTPDZ128mbk:
case X86::VSQRTPDZ128mbkz:
case X86::VSQRTPDZ128mk:
case X86::VSQRTPDZ128mkz:
case X86::VSQRTPDZ128r:
case X86::VSQRTPDZ128rk:
case X86::VSQRTPDZ128rkz:
case X86::VSQRTPDZ256m:
case X86::VSQRTPDZ256mb:
case X86::VSQRTPDZ256mbk:
case X86::VSQRTPDZ256mbkz:
case X86::VSQRTPDZ256mk:
case X86::VSQRTPDZ256mkz:
case X86::VSQRTPDZ256r:
case X86::VSQRTPDZ256rk:
case X86::VSQRTPDZ256rkz:
case X86::VSQRTPDZm:
case X86::VSQRTPDZmb:
case X86::VSQRTPDZmbk:
case X86::VSQRTPDZmbkz:
case X86::VSQRTPDZmk:
case X86::VSQRTPDZmkz:
case X86::VSQRTPDZr:
case X86::VSQRTPDZrb:
case X86::VSQRTPDZrbk:
case X86::VSQRTPDZrbkz:
case X86::VSQRTPDZrk:
case X86::VSQRTPDZrkz:
case X86::VSQRTPSZ128m:
case X86::VSQRTPSZ128mb:
case X86::VSQRTPSZ128mbk:
case X86::VSQRTPSZ128mbkz:
case X86::VSQRTPSZ128mk:
case X86::VSQRTPSZ128mkz:
case X86::VSQRTPSZ128r:
case X86::VSQRTPSZ128rk:
case X86::VSQRTPSZ128rkz:
case X86::VSQRTPSZ256m:
case X86::VSQRTPSZ256mb:
case X86::VSQRTPSZ256mbk:
case X86::VSQRTPSZ256mbkz:
case X86::VSQRTPSZ256mk:
case X86::VSQRTPSZ256mkz:
case X86::VSQRTPSZ256r:
case X86::VSQRTPSZ256rk:
case X86::VSQRTPSZ256rkz:
case X86::VSQRTPSZm:
case X86::VSQRTPSZmb:
case X86::VSQRTPSZmbk:
case X86::VSQRTPSZmbkz:
case X86::VSQRTPSZmk:
case X86::VSQRTPSZmkz:
case X86::VSQRTPSZr:
case X86::VSQRTPSZrb:
case X86::VSQRTPSZrbk:
case X86::VSQRTPSZrbkz:
case X86::VSQRTPSZrk:
case X86::VSQRTPSZrkz:
case X86::VSQRTSDZm:
case X86::VSQRTSDZm_Int:
case X86::VSQRTSDZm_Intk:
case X86::VSQRTSDZm_Intkz:
case X86::VSQRTSDZr:
case X86::VSQRTSDZr_Int:
case X86::VSQRTSDZr_Intk:
case X86::VSQRTSDZr_Intkz:
case X86::VSQRTSDZrb_Int:
case X86::VSQRTSDZrb_Intk:
case X86::VSQRTSDZrb_Intkz:
case X86::VSQRTSSZm:
case X86::VSQRTSSZm_Int:
case X86::VSQRTSSZm_Intk:
case X86::VSQRTSSZm_Intkz:
case X86::VSQRTSSZr:
case X86::VSQRTSSZr_Int:
case X86::VSQRTSSZr_Intk:
case X86::VSQRTSSZr_Intkz:
case X86::VSQRTSSZrb_Int:
case X86::VSQRTSSZrb_Intk:
case X86::VSQRTSSZrb_Intkz:

case X86::VGATHERDPDYrm:
case X86::VGATHERDPDZ128rm:
case X86::VGATHERDPDZ256rm:
case X86::VGATHERDPDZrm:
case X86::VGATHERDPDrm:
case X86::VGATHERDPSYrm:
case X86::VGATHERDPSZ128rm:
case X86::VGATHERDPSZ256rm:
case X86::VGATHERDPSZrm:
case X86::VGATHERDPSrm:
case X86::VGATHERPF0DPDm:
case X86::VGATHERPF0DPSm:
case X86::VGATHERPF0QPDm:
case X86::VGATHERPF0QPSm:
case X86::VGATHERPF1DPDm:
case X86::VGATHERPF1DPSm:
case X86::VGATHERPF1QPDm:
case X86::VGATHERPF1QPSm:
case X86::VGATHERQPDYrm:
case X86::VGATHERQPDZ128rm:
case X86::VGATHERQPDZ256rm:
case X86::VGATHERQPDZrm:
case X86::VGATHERQPDrm:
case X86::VGATHERQPSYrm:
case X86::VGATHERQPSZ128rm:
case X86::VGATHERQPSZ256rm:
case X86::VGATHERQPSZrm:
case X86::VGATHERQPSrm:
case X86::VPGATHERDDYrm:
case X86::VPGATHERDDZ128rm:
case X86::VPGATHERDDZ256rm:
case X86::VPGATHERDDZrm:
case X86::VPGATHERDDrm:
case X86::VPGATHERDQYrm:
case X86::VPGATHERDQZ128rm:
case X86::VPGATHERDQZ256rm:
case X86::VPGATHERDQZrm:
case X86::VPGATHERDQrm:
case X86::VPGATHERQDYrm:
case X86::VPGATHERQDZ128rm:
case X86::VPGATHERQDZ256rm:
case X86::VPGATHERQDZrm:
case X86::VPGATHERQDrm:
case X86::VPGATHERQQYrm:
case X86::VPGATHERQQZ128rm:
case X86::VPGATHERQQZ256rm:
case X86::VPGATHERQQZrm:
case X86::VPGATHERQQrm:
case X86::VSCATTERDPDZ128mr:
case X86::VSCATTERDPDZ256mr:
case X86::VSCATTERDPDZmr:
case X86::VSCATTERDPSZ128mr:
case X86::VSCATTERDPSZ256mr:
case X86::VSCATTERDPSZmr:
case X86::VSCATTERPF0DPDm:
case X86::VSCATTERPF0DPSm:
case X86::VSCATTERPF0QPDm:
case X86::VSCATTERPF0QPSm:
case X86::VSCATTERPF1DPDm:
case X86::VSCATTERPF1DPSm:
case X86::VSCATTERPF1QPDm:
case X86::VSCATTERPF1QPSm:
case X86::VSCATTERQPDZ128mr:
case X86::VSCATTERQPDZ256mr:
case X86::VSCATTERQPDZmr:
case X86::VSCATTERQPSZ128mr:
case X86::VSCATTERQPSZ256mr:
case X86::VSCATTERQPSZmr:
case X86::VPSCATTERDDZ128mr:
case X86::VPSCATTERDDZ256mr:
case X86::VPSCATTERDDZmr:
case X86::VPSCATTERDQZ128mr:
case X86::VPSCATTERDQZ256mr:
case X86::VPSCATTERDQZmr:
case X86::VPSCATTERQDZ128mr:
case X86::VPSCATTERQDZ256mr:
case X86::VPSCATTERQDZmr:
case X86::VPSCATTERQQZ128mr:
case X86::VPSCATTERQQZ256mr:
case X86::VPSCATTERQQZmr:
  return true;
}
8094}

8096bool X86InstrInfo::hasHighOperandLatency(const TargetSchedModel &SchedModel,
                                       const MachineRegisterInfo *MRI,
                                       const MachineInstr &DefMI,
                                       unsigned DefIdx,
                                       const MachineInstr &UseMI,
                                       unsigned UseIdx) const {
return isHighLatencyDef(DefMI.getOpcode());
8103}

8105bool X86InstrInfo::hasReassociableOperands(const MachineInstr &Inst,
                                         const MachineBasicBlock *MBB) const {
assert(Inst.getNumExplicitOperands() == 3 && Inst.getNumExplicitDefs() == 1 &&((void)0)
       Inst.getNumDefs() <= 2 && "Reassociation needs binary operators")((void)0);

// Integer binary math/logic instructions have a third source operand:
// the EFLAGS register. That operand must be both defined here and never
// used; ie, it must be dead. If the EFLAGS operand is live, then we can
// not change anything because rearranging the operands could affect other
// instructions that depend on the exact status flags (zero, sign, etc.)
// that are set by using these particular operands with this operation.
const MachineOperand *FlagDef = Inst.findRegisterDefOperand(X86::EFLAGS);
assert((Inst.getNumDefs() == 1 || FlagDef) &&((void)0)
       "Implicit def isn't flags?")((void)0);
if (FlagDef && !FlagDef->isDead())
  return false;

return TargetInstrInfo::hasReassociableOperands(Inst, MBB);
8123}

8125// TODO: There are many more machine instruction opcodes to match:
8126//       1. Other data types (integer, vectors)
8127//       2. Other math / logic operations (xor, or)
8128//       3. Other forms of the same operation (intrinsics and other variants)
8129bool X86InstrInfo::isAssociativeAndCommutative(const MachineInstr &Inst) const {
switch (Inst.getOpcode()) {
case X86::AND8rr:
case X86::AND16rr:
case X86::AND32rr:
case X86::AND64rr:
case X86::OR8rr:
case X86::OR16rr:
case X86::OR32rr:
case X86::OR64rr:
case X86::XOR8rr:
case X86::XOR16rr:
case X86::XOR32rr:
case X86::XOR64rr:
case X86::IMUL16rr:
case X86::IMUL32rr:
case X86::IMUL64rr:
case X86::PANDrr:
case X86::PORrr:
case X86::PXORrr:
case X86::ANDPDrr:
case X86::ANDPSrr:
case X86::ORPDrr:
case X86::ORPSrr:
case X86::XORPDrr:
case X86::XORPSrr:
case X86::PADDBrr:
case X86::PADDWrr:
case X86::PADDDrr:
case X86::PADDQrr:
case X86::PMULLWrr:
case X86::PMULLDrr:
case X86::PMAXSBrr:
case X86::PMAXSDrr:
case X86::PMAXSWrr:
case X86::PMAXUBrr:
case X86::PMAXUDrr:
case X86::PMAXUWrr:
case X86::PMINSBrr:
case X86::PMINSDrr:
case X86::PMINSWrr:
case X86::PMINUBrr:
case X86::PMINUDrr:
case X86::PMINUWrr:
case X86::VPANDrr:
case X86::VPANDYrr:
case X86::VPANDDZ128rr:
case X86::VPANDDZ256rr:
case X86::VPANDDZrr:
case X86::VPANDQZ128rr:
case X86::VPANDQZ256rr:
case X86::VPANDQZrr:
case X86::VPORrr:
case X86::VPORYrr:
case X86::VPORDZ128rr:
case X86::VPORDZ256rr:
case X86::VPORDZrr:
case X86::VPORQZ128rr:
case X86::VPORQZ256rr:
case X86::VPORQZrr:
case X86::VPXORrr:
case X86::VPXORYrr:
case X86::VPXORDZ128rr:
case X86::VPXORDZ256rr:
case X86::VPXORDZrr:
case X86::VPXORQZ128rr:
case X86::VPXORQZ256rr:
case X86::VPXORQZrr:
case X86::VANDPDrr:
case X86::VANDPSrr:
case X86::VANDPDYrr:
case X86::VANDPSYrr:
case X86::VANDPDZ128rr:
case X86::VANDPSZ128rr:
case X86::VANDPDZ256rr:
case X86::VANDPSZ256rr:
case X86::VANDPDZrr:
case X86::VANDPSZrr:
case X86::VORPDrr:
case X86::VORPSrr:
case X86::VORPDYrr:
case X86::VORPSYrr:
case X86::VORPDZ128rr:
case X86::VORPSZ128rr:
case X86::VORPDZ256rr:
case X86::VORPSZ256rr:
case X86::VORPDZrr:
case X86::VORPSZrr:
case X86::VXORPDrr:
case X86::VXORPSrr:
case X86::VXORPDYrr:
case X86::VXORPSYrr:
case X86::VXORPDZ128rr:
case X86::VXORPSZ128rr:
case X86::VXORPDZ256rr:
case X86::VXORPSZ256rr:
case X86::VXORPDZrr:
case X86::VXORPSZrr:
case X86::KADDBrr:
case X86::KADDWrr:
case X86::KADDDrr:
case X86::KADDQrr:
case X86::KANDBrr:
case X86::KANDWrr:
case X86::KANDDrr:
case X86::KANDQrr:
case X86::KORBrr:
case X86::KORWrr:
case X86::KORDrr:
case X86::KORQrr:
case X86::KXORBrr:
case X86::KXORWrr:
case X86::KXORDrr:
case X86::KXORQrr:
case X86::VPADDBrr:
case X86::VPADDWrr:
case X86::VPADDDrr:
case X86::VPADDQrr:
case X86::VPADDBYrr:
case X86::VPADDWYrr:
case X86::VPADDDYrr:
case X86::VPADDQYrr:
case X86::VPADDBZ128rr:
case X86::VPADDWZ128rr:
case X86::VPADDDZ128rr:
case X86::VPADDQZ128rr:
case X86::VPADDBZ256rr:
case X86::VPADDWZ256rr:
case X86::VPADDDZ256rr:
case X86::VPADDQZ256rr:
case X86::VPADDBZrr:
case X86::VPADDWZrr:
case X86::VPADDDZrr:
case X86::VPADDQZrr:
case X86::VPMULLWrr:
case X86::VPMULLWYrr:
case X86::VPMULLWZ128rr:
case X86::VPMULLWZ256rr:
case X86::VPMULLWZrr:
case X86::VPMULLDrr:
case X86::VPMULLDYrr:
case X86::VPMULLDZ128rr:
case X86::VPMULLDZ256rr:
case X86::VPMULLDZrr:
case X86::VPMULLQZ128rr:
case X86::VPMULLQZ256rr:
case X86::VPMULLQZrr:
case X86::VPMAXSBrr:
case X86::VPMAXSBYrr:
case X86::VPMAXSBZ128rr:
case X86::VPMAXSBZ256rr:
case X86::VPMAXSBZrr:
case X86::VPMAXSDrr:
case X86::VPMAXSDYrr:
case X86::VPMAXSDZ128rr:
case X86::VPMAXSDZ256rr:
case X86::VPMAXSDZrr:
case X86::VPMAXSQZ128rr:
case X86::VPMAXSQZ256rr:
case X86::VPMAXSQZrr:
case X86::VPMAXSWrr:
case X86::VPMAXSWYrr:
case X86::VPMAXSWZ128rr:
case X86::VPMAXSWZ256rr:
case X86::VPMAXSWZrr:
case X86::VPMAXUBrr:
case X86::VPMAXUBYrr:
case X86::VPMAXUBZ128rr:
case X86::VPMAXUBZ256rr:
case X86::VPMAXUBZrr:
case X86::VPMAXUDrr:
case X86::VPMAXUDYrr:
case X86::VPMAXUDZ128rr:
case X86::VPMAXUDZ256rr:
case X86::VPMAXUDZrr:
case X86::VPMAXUQZ128rr:
case X86::VPMAXUQZ256rr:
case X86::VPMAXUQZrr:
case X86::VPMAXUWrr:
case X86::VPMAXUWYrr:
case X86::VPMAXUWZ128rr:
case X86::VPMAXUWZ256rr:
case X86::VPMAXUWZrr:
case X86::VPMINSBrr:
case X86::VPMINSBYrr:
case X86::VPMINSBZ128rr:
case X86::VPMINSBZ256rr:
case X86::VPMINSBZrr:
case X86::VPMINSDrr:
case X86::VPMINSDYrr:
case X86::VPMINSDZ128rr:
case X86::VPMINSDZ256rr:
case X86::VPMINSDZrr:
case X86::VPMINSQZ128rr:
case X86::VPMINSQZ256rr:
case X86::VPMINSQZrr:
case X86::VPMINSWrr:
case X86::VPMINSWYrr:
case X86::VPMINSWZ128rr:
case X86::VPMINSWZ256rr:
case X86::VPMINSWZrr:
case X86::VPMINUBrr:
case X86::VPMINUBYrr:
case X86::VPMINUBZ128rr:
case X86::VPMINUBZ256rr:
case X86::VPMINUBZrr:
case X86::VPMINUDrr:
case X86::VPMINUDYrr:
case X86::VPMINUDZ128rr:
case X86::VPMINUDZ256rr:
case X86::VPMINUDZrr:
case X86::VPMINUQZ128rr:
case X86::VPMINUQZ256rr:
case X86::VPMINUQZrr:
case X86::VPMINUWrr:
case X86::VPMINUWYrr:
case X86::VPMINUWZ128rr:
case X86::VPMINUWZ256rr:
case X86::VPMINUWZrr:
// Normal min/max instructions are not commutative because of NaN and signed
// zero semantics, but these are. Thus, there's no need to check for global
// relaxed math; the instructions themselves have the properties we need.
case X86::MAXCPDrr:
case X86::MAXCPSrr:
case X86::MAXCSDrr:
case X86::MAXCSSrr:
case X86::MINCPDrr:
case X86::MINCPSrr:
case X86::MINCSDrr:
case X86::MINCSSrr:
case X86::VMAXCPDrr:
case X86::VMAXCPSrr:
case X86::VMAXCPDYrr:
case X86::VMAXCPSYrr:
case X86::VMAXCPDZ128rr:
case X86::VMAXCPSZ128rr:
case X86::VMAXCPDZ256rr:
case X86::VMAXCPSZ256rr:
case X86::VMAXCPDZrr:
case X86::VMAXCPSZrr:
case X86::VMAXCSDrr:
case X86::VMAXCSSrr:
case X86::VMAXCSDZrr:
case X86::VMAXCSSZrr:
case X86::VMINCPDrr:
case X86::VMINCPSrr:
case X86::VMINCPDYrr:
case X86::VMINCPSYrr:
case X86::VMINCPDZ128rr:
case X86::VMINCPSZ128rr:
case X86::VMINCPDZ256rr:
case X86::VMINCPSZ256rr:
case X86::VMINCPDZrr:
case X86::VMINCPSZrr:
case X86::VMINCSDrr:
case X86::VMINCSSrr:
case X86::VMINCSDZrr:
case X86::VMINCSSZrr:
  return true;
case X86::ADDPDrr:
case X86::ADDPSrr:
case X86::ADDSDrr:
case X86::ADDSSrr:
case X86::MULPDrr:
case X86::MULPSrr:
case X86::MULSDrr:
case X86::MULSSrr:
case X86::VADDPDrr:
case X86::VADDPSrr:
case X86::VADDPDYrr:
case X86::VADDPSYrr:
case X86::VADDPDZ128rr:
case X86::VADDPSZ128rr:
case X86::VADDPDZ256rr:
case X86::VADDPSZ256rr:
case X86::VADDPDZrr:
case X86::VADDPSZrr:
case X86::VADDSDrr:
case X86::VADDSSrr:
case X86::VADDSDZrr:
case X86::VADDSSZrr:
case X86::VMULPDrr:
case X86::VMULPSrr:
case X86::VMULPDYrr:
case X86::VMULPSYrr:
case X86::VMULPDZ128rr:
case X86::VMULPSZ128rr:
case X86::VMULPDZ256rr:
case X86::VMULPSZ256rr:
case X86::VMULPDZrr:
case X86::VMULPSZrr:
case X86::VMULSDrr:
case X86::VMULSSrr:
case X86::VMULSDZrr:
case X86::VMULSSZrr:
  return Inst.getFlag(MachineInstr::MIFlag::FmReassoc) &&
         Inst.getFlag(MachineInstr::MIFlag::FmNsz);
default:
  return false;
}
8429}

8431/// If \p DescribedReg overlaps with the MOVrr instruction's destination
8432/// register then, if possible, describe the value in terms of the source
8433/// register.
8434static Optional<ParamLoadedValue>
8435describeMOVrrLoadedValue(const MachineInstr &MI, Register DescribedReg,
                       const TargetRegisterInfo *TRI) {
Register DestReg = MI.getOperand(0).getReg();
Register SrcReg = MI.getOperand(1).getReg();

auto Expr = DIExpression::get(MI.getMF()->getFunction().getContext(), {});

// If the described register is the destination, just return the source.
if (DestReg == DescribedReg)
  return ParamLoadedValue(MachineOperand::CreateReg(SrcReg, false), Expr);

// If the described register is a sub-register of the destination register,
// then pick out the source register's corresponding sub-register.
if (unsigned SubRegIdx = TRI->getSubRegIndex(DestReg, DescribedReg)) {
  Register SrcSubReg = TRI->getSubReg(SrcReg, SubRegIdx);
  return ParamLoadedValue(MachineOperand::CreateReg(SrcSubReg, false), Expr);
}

// The remaining case to consider is when the described register is a
// super-register of the destination register. MOV8rr and MOV16rr does not
// write to any of the other bytes in the register, meaning that we'd have to
// describe the value using a combination of the source register and the
// non-overlapping bits in the described register, which is not currently
// possible.
if (MI.getOpcode() == X86::MOV8rr || MI.getOpcode() == X86::MOV16rr ||
    !TRI->isSuperRegister(DestReg, DescribedReg))
  return None;

assert(MI.getOpcode() == X86::MOV32rr && "Unexpected super-register case")((void)0);
return ParamLoadedValue(MachineOperand::CreateReg(SrcReg, false), Expr);
8465}

8467Optional<ParamLoadedValue>
8468X86InstrInfo::describeLoadedValue(const MachineInstr &MI, Register Reg) const {
const MachineOperand *Op = nullptr;
DIExpression *Expr = nullptr;

const TargetRegisterInfo *TRI = &getRegisterInfo();

switch (MI.getOpcode()) {
case X86::LEA32r:
case X86::LEA64r:
case X86::LEA64_32r: {
  // We may need to describe a 64-bit parameter with a 32-bit LEA.
  if (!TRI->isSuperRegisterEq(MI.getOperand(0).getReg(), Reg))
    return None;

  // Operand 4 could be global address. For now we do not support
  // such situation.
  if (!MI.getOperand(4).isImm() || !MI.getOperand(2).isImm())
    return None;

  const MachineOperand &Op1 = MI.getOperand(1);
  const MachineOperand &Op2 = MI.getOperand(3);
  assert(Op2.isReg() && (Op2.getReg() == X86::NoRegister ||((void)0)
                         Register::isPhysicalRegister(Op2.getReg())))((void)0);

  // Omit situations like:
  // %rsi = lea %rsi, 4, ...
  if ((Op1.isReg() && Op1.getReg() == MI.getOperand(0).getReg()) ||
      Op2.getReg() == MI.getOperand(0).getReg())
    return None;
  else if ((Op1.isReg() && Op1.getReg() != X86::NoRegister &&
            TRI->regsOverlap(Op1.getReg(), MI.getOperand(0).getReg())) ||
           (Op2.getReg() != X86::NoRegister &&
            TRI->regsOverlap(Op2.getReg(), MI.getOperand(0).getReg())))
    return None;

  int64_t Coef = MI.getOperand(2).getImm();
  int64_t Offset = MI.getOperand(4).getImm();
  SmallVector<uint64_t, 8> Ops;

  if ((Op1.isReg() && Op1.getReg() != X86::NoRegister)) {
    Op = &Op1;
  } else if (Op1.isFI())
    Op = &Op1;

  if (Op && Op->isReg() && Op->getReg() == Op2.getReg() && Coef > 0) {
    Ops.push_back(dwarf::DW_OP_constu);
    Ops.push_back(Coef + 1);
    Ops.push_back(dwarf::DW_OP_mul);
  } else {
    if (Op && Op2.getReg() != X86::NoRegister) {
      int dwarfReg = TRI->getDwarfRegNum(Op2.getReg(), false);
      if (dwarfReg < 0)
        return None;
      else if (dwarfReg < 32) {
        Ops.push_back(dwarf::DW_OP_breg0 + dwarfReg);
        Ops.push_back(0);
      } else {
        Ops.push_back(dwarf::DW_OP_bregx);
        Ops.push_back(dwarfReg);
        Ops.push_back(0);
      }
    } else if (!Op) {
      assert(Op2.getReg() != X86::NoRegister)((void)0);
      Op = &Op2;
    }

    if (Coef > 1) {
      assert(Op2.getReg() != X86::NoRegister)((void)0);
      Ops.push_back(dwarf::DW_OP_constu);
      Ops.push_back(Coef);
      Ops.push_back(dwarf::DW_OP_mul);
    }

    if (((Op1.isReg() && Op1.getReg() != X86::NoRegister) || Op1.isFI()) &&
        Op2.getReg() != X86::NoRegister) {
      Ops.push_back(dwarf::DW_OP_plus);
    }
  }

  DIExpression::appendOffset(Ops, Offset);
  Expr = DIExpression::get(MI.getMF()->getFunction().getContext(), Ops);

  return ParamLoadedValue(*Op, Expr);;
}
case X86::MOV8ri:
case X86::MOV16ri:
  // TODO: Handle MOV8ri and MOV16ri.
  return None;
case X86::MOV32ri:
case X86::MOV64ri:
case X86::MOV64ri32:
  // MOV32ri may be used for producing zero-extended 32-bit immediates in
  // 64-bit parameters, so we need to consider super-registers.
  if (!TRI->isSuperRegisterEq(MI.getOperand(0).getReg(), Reg))
    return None;
  return ParamLoadedValue(MI.getOperand(1), Expr);
case X86::MOV8rr:
case X86::MOV16rr:
case X86::MOV32rr:
case X86::MOV64rr:
  return describeMOVrrLoadedValue(MI, Reg, TRI);
case X86::XOR32rr: {
  // 64-bit parameters are zero-materialized using XOR32rr, so also consider
  // super-registers.
  if (!TRI->isSuperRegisterEq(MI.getOperand(0).getReg(), Reg))
    return None;
  if (MI.getOperand(1).getReg() == MI.getOperand(2).getReg())
    return ParamLoadedValue(MachineOperand::CreateImm(0), Expr);
  return None;
}
case X86::MOVSX64rr32: {
  // We may need to describe the lower 32 bits of the MOVSX; for example, in
  // cases like this:
  //
  //  $ebx = [...]
  //  $rdi = MOVSX64rr32 $ebx
  //  $esi = MOV32rr $edi
  if (!TRI->isSubRegisterEq(MI.getOperand(0).getReg(), Reg))
    return None;

  Expr = DIExpression::get(MI.getMF()->getFunction().getContext(), {});

  // If the described register is the destination register we need to
  // sign-extend the source register from 32 bits. The other case we handle
  // is when the described register is the 32-bit sub-register of the
  // destination register, in case we just need to return the source
  // register.
  if (Reg == MI.getOperand(0).getReg())
    Expr = DIExpression::appendExt(Expr, 32, 64, true);
  else
    assert(X86MCRegisterClasses[X86::GR32RegClassID].contains(Reg) &&((void)0)
           "Unhandled sub-register case for MOVSX64rr32")((void)0);

  return ParamLoadedValue(MI.getOperand(1), Expr);
}
default:
  assert(!MI.isMoveImmediate() && "Unexpected MoveImm instruction")((void)0);
  return TargetInstrInfo::describeLoadedValue(MI, Reg);
}
8607}

8609/// This is an architecture-specific helper function of reassociateOps.
8610/// Set special operand attributes for new instructions after reassociation.
8611void X86InstrInfo::setSpecialOperandAttr(MachineInstr &OldMI1,
                                       MachineInstr &OldMI2,
                                       MachineInstr &NewMI1,
                                       MachineInstr &NewMI2) const {
// Propagate FP flags from the original instructions.
// But clear poison-generating flags because those may not be valid now.
// TODO: There should be a helper function for copying only fast-math-flags.
uint16_t IntersectedFlags = OldMI1.getFlags() & OldMI2.getFlags();
NewMI1.setFlags(IntersectedFlags);
NewMI1.clearFlag(MachineInstr::MIFlag::NoSWrap);
NewMI1.clearFlag(MachineInstr::MIFlag::NoUWrap);
NewMI1.clearFlag(MachineInstr::MIFlag::IsExact);

NewMI2.setFlags(IntersectedFlags);
NewMI2.clearFlag(MachineInstr::MIFlag::NoSWrap);
NewMI2.clearFlag(MachineInstr::MIFlag::NoUWrap);
NewMI2.clearFlag(MachineInstr::MIFlag::IsExact);

// Integer instructions may define an implicit EFLAGS dest register operand.
MachineOperand *OldFlagDef1 = OldMI1.findRegisterDefOperand(X86::EFLAGS);
MachineOperand *OldFlagDef2 = OldMI2.findRegisterDefOperand(X86::EFLAGS);

assert(!OldFlagDef1 == !OldFlagDef2 &&((void)0)
       "Unexpected instruction type for reassociation")((void)0);

if (!OldFlagDef1 || !OldFlagDef2)
  return;

assert(OldFlagDef1->isDead() && OldFlagDef2->isDead() &&((void)0)
       "Must have dead EFLAGS operand in reassociable instruction")((void)0);

MachineOperand *NewFlagDef1 = NewMI1.findRegisterDefOperand(X86::EFLAGS);
MachineOperand *NewFlagDef2 = NewMI2.findRegisterDefOperand(X86::EFLAGS);

assert(NewFlagDef1 && NewFlagDef2 &&((void)0)
       "Unexpected operand in reassociable instruction")((void)0);

// Mark the new EFLAGS operands as dead to be helpful to subsequent iterations
// of this pass or other passes. The EFLAGS operands must be dead in these new
// instructions because the EFLAGS operands in the original instructions must
// be dead in order for reassociation to occur.
NewFlagDef1->setIsDead();
NewFlagDef2->setIsDead();
8654}

8656std::pair<unsigned, unsigned>
8657X86InstrInfo::decomposeMachineOperandsTargetFlags(unsigned TF) const {
return std::make_pair(TF, 0u);
8659}

8661ArrayRef<std::pair<unsigned, const char *>>
8662X86InstrInfo::getSerializableDirectMachineOperandTargetFlags() const {
using namespace X86II;
static const std::pair<unsigned, const char *> TargetFlags[] = {
    {MO_GOT_ABSOLUTE_ADDRESS, "x86-got-absolute-address"},
    {MO_PIC_BASE_OFFSET, "x86-pic-base-offset"},
    {MO_GOT, "x86-got"},
    {MO_GOTOFF, "x86-gotoff"},
    {MO_GOTPCREL, "x86-gotpcrel"},
    {MO_PLT, "x86-plt"},
    {MO_TLSGD, "x86-tlsgd"},
    {MO_TLSLD, "x86-tlsld"},
    {MO_TLSLDM, "x86-tlsldm"},
    {MO_GOTTPOFF, "x86-gottpoff"},
    {MO_INDNTPOFF, "x86-indntpoff"},
    {MO_TPOFF, "x86-tpoff"},
    {MO_DTPOFF, "x86-dtpoff"},
    {MO_NTPOFF, "x86-ntpoff"},
    {MO_GOTNTPOFF, "x86-gotntpoff"},
    {MO_DLLIMPORT, "x86-dllimport"},
    {MO_DARWIN_NONLAZY, "x86-darwin-nonlazy"},
    {MO_DARWIN_NONLAZY_PIC_BASE, "x86-darwin-nonlazy-pic-base"},
    {MO_TLVP, "x86-tlvp"},
    {MO_TLVP_PIC_BASE, "x86-tlvp-pic-base"},
    {MO_SECREL, "x86-secrel"},
    {MO_COFFSTUB, "x86-coffstub"}};
return makeArrayRef(TargetFlags);
8688}

8690namespace {
/// Create Global Base Reg pass. This initializes the PIC
/// global base register for x86-32.
struct CGBR : public MachineFunctionPass {
  static char ID;
  CGBR() : MachineFunctionPass(ID) {}

  bool runOnMachineFunction(MachineFunction &MF) override {
    const X86TargetMachine *TM =
      static_cast<const X86TargetMachine *>(&MF.getTarget());
    const X86Subtarget &STI = MF.getSubtarget<X86Subtarget>();

    // Don't do anything in the 64-bit small and kernel code models. They use
    // RIP-relative addressing for everything.
    if (STI.is64Bit() && (TM->getCodeModel() == CodeModel::Small ||
                          TM->getCodeModel() == CodeModel::Kernel))
      return false;

    // Only emit a global base reg in PIC mode.
    if (!TM->isPositionIndependent())
      return false;

    X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
    Register GlobalBaseReg = X86FI->getGlobalBaseReg();

    // If we didn't need a GlobalBaseReg, don't insert code.
    if (GlobalBaseReg == 0)
      return false;

    // Insert the set of GlobalBaseReg into the first MBB of the function
    MachineBasicBlock &FirstMBB = MF.front();
    MachineBasicBlock::iterator MBBI = FirstMBB.begin();
    DebugLoc DL = FirstMBB.findDebugLoc(MBBI);
    MachineRegisterInfo &RegInfo = MF.getRegInfo();
    const X86InstrInfo *TII = STI.getInstrInfo();

    Register PC;
    if (STI.isPICStyleGOT())
      PC = RegInfo.createVirtualRegister(&X86::GR32RegClass);
    else
      PC = GlobalBaseReg;

    if (STI.is64Bit()) {
      if (TM->getCodeModel() == CodeModel::Medium) {
        // In the medium code model, use a RIP-relative LEA to materialize the
        // GOT.
        BuildMI(FirstMBB, MBBI, DL, TII->get(X86::LEA64r), PC)
            .addReg(X86::RIP)
            .addImm(0)
            .addReg(0)
            .addExternalSymbol("_GLOBAL_OFFSET_TABLE_")
            .addReg(0);
      } else if (TM->getCodeModel() == CodeModel::Large) {
        // In the large code model, we are aiming for this code, though the
        // register allocation may vary:
        //   leaq .LN$pb(%rip), %rax
        //   movq $_GLOBAL_OFFSET_TABLE_ - .LN$pb, %rcx
        //   addq %rcx, %rax
        // RAX now holds address of _GLOBAL_OFFSET_TABLE_.
        Register PBReg = RegInfo.createVirtualRegister(&X86::GR64RegClass);
        Register GOTReg = RegInfo.createVirtualRegister(&X86::GR64RegClass);
        BuildMI(FirstMBB, MBBI, DL, TII->get(X86::LEA64r), PBReg)
            .addReg(X86::RIP)
            .addImm(0)
            .addReg(0)
            .addSym(MF.getPICBaseSymbol())
            .addReg(0);
        std::prev(MBBI)->setPreInstrSymbol(MF, MF.getPICBaseSymbol());
        BuildMI(FirstMBB, MBBI, DL, TII->get(X86::MOV64ri), GOTReg)
            .addExternalSymbol("_GLOBAL_OFFSET_TABLE_",
                               X86II::MO_PIC_BASE_OFFSET);
        BuildMI(FirstMBB, MBBI, DL, TII->get(X86::ADD64rr), PC)
            .addReg(PBReg, RegState::Kill)
            .addReg(GOTReg, RegState::Kill);
      } else {
        llvm_unreachable("unexpected code model")__builtin_unreachable();
      }
    } else {
      // Operand of MovePCtoStack is completely ignored by asm printer. It's
      // only used in JIT code emission as displacement to pc.
      BuildMI(FirstMBB, MBBI, DL, TII->get(X86::MOVPC32r), PC).addImm(0);

      // If we're using vanilla 'GOT' PIC style, we should use relative
      // addressing not to pc, but to _GLOBAL_OFFSET_TABLE_ external.
      if (STI.isPICStyleGOT()) {
        // Generate addl $__GLOBAL_OFFSET_TABLE_ + [.-piclabel],
        // %some_register
        BuildMI(FirstMBB, MBBI, DL, TII->get(X86::ADD32ri), GlobalBaseReg)
            .addReg(PC)
            .addExternalSymbol("_GLOBAL_OFFSET_TABLE_",
                               X86II::MO_GOT_ABSOLUTE_ADDRESS);
      }
    }

    return true;
  }

  StringRef getPassName() const override {
    return "X86 PIC Global Base Reg Initialization";
  }

  void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.setPreservesCFG();
    MachineFunctionPass::getAnalysisUsage(AU);
  }
};
8796} // namespace

8798char CGBR::ID = 0;
8799FunctionPass*
8800llvm::createX86GlobalBaseRegPass() { return new CGBR(); }

8802namespace {
struct LDTLSCleanup : public MachineFunctionPass {
  static char ID;
  LDTLSCleanup() : MachineFunctionPass(ID) {}

  bool runOnMachineFunction(MachineFunction &MF) override {
    if (skipFunction(MF.getFunction()))
      return false;

    X86MachineFunctionInfo *MFI = MF.getInfo<X86MachineFunctionInfo>();
    if (MFI->getNumLocalDynamicTLSAccesses() < 2) {
      // No point folding accesses if there isn't at least two.
      return false;
    }

    MachineDominatorTree *DT = &getAnalysis<MachineDominatorTree>();
    return VisitNode(DT->getRootNode(), 0);
  }

  // Visit the dominator subtree rooted at Node in pre-order.
  // If TLSBaseAddrReg is non-null, then use that to replace any
  // TLS_base_addr instructions. Otherwise, create the register
  // when the first such instruction is seen, and then use it
  // as we encounter more instructions.
  bool VisitNode(MachineDomTreeNode *Node, unsigned TLSBaseAddrReg) {
    MachineBasicBlock *BB = Node->getBlock();
    bool Changed = false;

    // Traverse the current block.
    for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end(); I != E;
         ++I) {
      switch (I->getOpcode()) {
        case X86::TLS_base_addr32:
        case X86::TLS_base_addr64:
          if (TLSBaseAddrReg)
            I = ReplaceTLSBaseAddrCall(*I, TLSBaseAddrReg);
          else
            I = SetRegister(*I, &TLSBaseAddrReg);
          Changed = true;
          break;
        default:
          break;
      }
    }

    // Visit the children of this block in the dominator tree.
    for (auto I = Node->begin(), E = Node->end(); I != E; ++I) {
      Changed |= VisitNode(*I, TLSBaseAddrReg);
    }

    return Changed;
  }

  // Replace the TLS_base_addr instruction I with a copy from
  // TLSBaseAddrReg, returning the new instruction.
  MachineInstr *ReplaceTLSBaseAddrCall(MachineInstr &I,
                                       unsigned TLSBaseAddrReg) {
    MachineFunction *MF = I.getParent()->getParent();
    const X86Subtarget &STI = MF->getSubtarget<X86Subtarget>();
    const bool is64Bit = STI.is64Bit();
    const X86InstrInfo *TII = STI.getInstrInfo();

    // Insert a Copy from TLSBaseAddrReg to RAX/EAX.
    MachineInstr *Copy =
        BuildMI(*I.getParent(), I, I.getDebugLoc(),
                TII->get(TargetOpcode::COPY), is64Bit ? X86::RAX : X86::EAX)
            .addReg(TLSBaseAddrReg);

    // Erase the TLS_base_addr instruction.
    I.eraseFromParent();

    return Copy;
  }

  // Create a virtual register in *TLSBaseAddrReg, and populate it by
  // inserting a copy instruction after I. Returns the new instruction.
  MachineInstr *SetRegister(MachineInstr &I, unsigned *TLSBaseAddrReg) {
    MachineFunction *MF = I.getParent()->getParent();
    const X86Subtarget &STI = MF->getSubtarget<X86Subtarget>();
    const bool is64Bit = STI.is64Bit();
    const X86InstrInfo *TII = STI.getInstrInfo();

    // Create a virtual register for the TLS base address.
    MachineRegisterInfo &RegInfo = MF->getRegInfo();
    *TLSBaseAddrReg = RegInfo.createVirtualRegister(is64Bit
                                                    ? &X86::GR64RegClass
                                                    : &X86::GR32RegClass);

    // Insert a copy from RAX/EAX to TLSBaseAddrReg.
    MachineInstr *Next = I.getNextNode();
    MachineInstr *Copy =
        BuildMI(*I.getParent(), Next, I.getDebugLoc(),
                TII->get(TargetOpcode::COPY), *TLSBaseAddrReg)
            .addReg(is64Bit ? X86::RAX : X86::EAX);

    return Copy;
  }

  StringRef getPassName() const override {
    return "Local Dynamic TLS Access Clean-up";
  }

  void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.setPreservesCFG();
    AU.addRequired<MachineDominatorTree>();
    MachineFunctionPass::getAnalysisUsage(AU);
  }
};
8910}

8912char LDTLSCleanup::ID = 0;
8913FunctionPass*
8914llvm::createCleanupLocalDynamicTLSPass() { return new LDTLSCleanup(); }

8916/// Constants defining how certain sequences should be outlined.
8917///
8918/// \p MachineOutlinerDefault implies that the function is called with a call
8919/// instruction, and a return must be emitted for the outlined function frame.
8920///
8921/// That is,
8922///
8923/// I1                                 OUTLINED_FUNCTION:
8924/// I2 --> call OUTLINED_FUNCTION       I1
8925/// I3                                  I2
8926///                                     I3
8927///                                     ret
8928///
8929/// * Call construction overhead: 1 (call instruction)
8930/// * Frame construction overhead: 1 (return instruction)
8931///
8932/// \p MachineOutlinerTailCall implies that the function is being tail called.
8933/// A jump is emitted instead of a call, and the return is already present in
8934/// the outlined sequence. That is,
8935///
8936/// I1                                 OUTLINED_FUNCTION:
8937/// I2 --> jmp OUTLINED_FUNCTION       I1
8938/// ret                                I2
8939///                                    ret
8940///
8941/// * Call construction overhead: 1 (jump instruction)
8942/// * Frame construction overhead: 0 (don't need to return)
8943///
8944enum MachineOutlinerClass {
MachineOutlinerDefault,
MachineOutlinerTailCall
8947};

8949outliner::OutlinedFunction X86InstrInfo::getOutliningCandidateInfo(
  std::vector<outliner::Candidate> &RepeatedSequenceLocs) const {
unsigned SequenceSize =
    std::accumulate(RepeatedSequenceLocs[0].front(),
                    std::next(RepeatedSequenceLocs[0].back()), 0,
                    [](unsigned Sum, const MachineInstr &MI) {
                      // FIXME: x86 doesn't implement getInstSizeInBytes, so
                      // we can't tell the cost.  Just assume each instruction
                      // is one byte.
                      if (MI.isDebugInstr() || MI.isKill())
                        return Sum;
                      return Sum + 1;
                    });

// We check to see if CFI Instructions are present, and if they are
// we find the number of CFI Instructions in the candidates.
unsigned CFICount = 0;
MachineBasicBlock::iterator MBBI = RepeatedSequenceLocs[0].front();
for (unsigned Loc = RepeatedSequenceLocs[0].getStartIdx();
     Loc < RepeatedSequenceLocs[0].getEndIdx() + 1; Loc++) {
  const std::vector<MCCFIInstruction> &CFIInstructions =
      RepeatedSequenceLocs[0].getMF()->getFrameInstructions();
  if (MBBI->isCFIInstruction()) {
    unsigned CFIIndex = MBBI->getOperand(0).getCFIIndex();
    MCCFIInstruction CFI = CFIInstructions[CFIIndex];
    CFICount++;
  }
  MBBI++;
}

// We compare the number of found CFI Instructions to  the number of CFI
// instructions in the parent function for each candidate.  We must check this
// since if we outline one of the CFI instructions in a function, we have to
// outline them all for correctness. If we do not, the address offsets will be
// incorrect between the two sections of the program.
for (outliner::Candidate &C : RepeatedSequenceLocs) {
  std::vector<MCCFIInstruction> CFIInstructions =
      C.getMF()->getFrameInstructions();

  if (CFICount > 0 && CFICount != CFIInstructions.size())
    return outliner::OutlinedFunction();
}

// FIXME: Use real size in bytes for call and ret instructions.
if (RepeatedSequenceLocs[0].back()->isTerminator()) {
  for (outliner::Candidate &C : RepeatedSequenceLocs)
    C.setCallInfo(MachineOutlinerTailCall, 1);

  return outliner::OutlinedFunction(RepeatedSequenceLocs, SequenceSize,
                                    0, // Number of bytes to emit frame.
                                    MachineOutlinerTailCall // Type of frame.
  );
}

if (CFICount > 0)
  return outliner::OutlinedFunction();

for (outliner::Candidate &C : RepeatedSequenceLocs)
  C.setCallInfo(MachineOutlinerDefault, 1);

return outliner::OutlinedFunction(RepeatedSequenceLocs, SequenceSize, 1,
                                  MachineOutlinerDefault);
9011}

9013bool X86InstrInfo::isFunctionSafeToOutlineFrom(MachineFunction &MF,
                                         bool OutlineFromLinkOnceODRs) const {
const Function &F = MF.getFunction();

// Does the function use a red zone? If it does, then we can't risk messing
// with the stack.
if (Subtarget.getFrameLowering()->has128ByteRedZone(MF)) {
  // It could have a red zone. If it does, then we don't want to touch it.
  const X86MachineFunctionInfo *X86FI = MF.getInfo<X86MachineFunctionInfo>();
  if (!X86FI || X86FI->getUsesRedZone())
    return false;
}

// If we *don't* want to outline from things that could potentially be deduped
// then return false.
if (!OutlineFromLinkOnceODRs && F.hasLinkOnceODRLinkage())
    return false;

// This function is viable for outlining, so return true.
return true;
9033}

9035outliner::InstrType
9036X86InstrInfo::getOutliningType(MachineBasicBlock::iterator &MIT,  unsigned Flags) const {
MachineInstr &MI = *MIT;
// Don't allow debug values to impact outlining type.
if (MI.isDebugInstr() || MI.isIndirectDebugValue())
  return outliner::InstrType::Invisible;

// At this point, KILL instructions don't really tell us much so we can go
// ahead and skip over them.
if (MI.isKill())
  return outliner::InstrType::Invisible;

// Is this a tail call? If yes, we can outline as a tail call.
if (isTailCall(MI))
  return outliner::InstrType::Legal;

// Is this the terminator of a basic block?
if (MI.isTerminator() || MI.isReturn()) {

  // Does its parent have any successors in its MachineFunction?
  if (MI.getParent()->succ_empty())
    return outliner::InstrType::Legal;

  // It does, so we can't tail call it.
  return outliner::InstrType::Illegal;
}

// Don't outline anything that modifies or reads from the stack pointer.
//
// FIXME: There are instructions which are being manually built without
// explicit uses/defs so we also have to check the MCInstrDesc. We should be
// able to remove the extra checks once those are fixed up. For example,
// sometimes we might get something like %rax = POP64r 1. This won't be
// caught by modifiesRegister or readsRegister even though the instruction
// really ought to be formed so that modifiesRegister/readsRegister would
// catch it.
if (MI.modifiesRegister(X86::RSP, &RI) || MI.readsRegister(X86::RSP, &RI) ||
    MI.getDesc().hasImplicitUseOfPhysReg(X86::RSP) ||
    MI.getDesc().hasImplicitDefOfPhysReg(X86::RSP))
  return outliner::InstrType::Illegal;

// Outlined calls change the instruction pointer, so don't read from it.
if (MI.readsRegister(X86::RIP, &RI) ||
    MI.getDesc().hasImplicitUseOfPhysReg(X86::RIP) ||
    MI.getDesc().hasImplicitDefOfPhysReg(X86::RIP))
  return outliner::InstrType::Illegal;

// Positions can't safely be outlined.
if (MI.isPosition())
  return outliner::InstrType::Illegal;

// Make sure none of the operands of this instruction do anything tricky.
for (const MachineOperand &MOP : MI.operands())
  if (MOP.isCPI() || MOP.isJTI() || MOP.isCFIIndex() || MOP.isFI() ||
      MOP.isTargetIndex())
    return outliner::InstrType::Illegal;

return outliner::InstrType::Legal;
9093}

9095void X86InstrInfo::buildOutlinedFrame(MachineBasicBlock &MBB,
                                        MachineFunction &MF,
                                        const outliner::OutlinedFunction &OF)
                                        const {
// If we're a tail call, we already have a return, so don't do anything.
if (OF.FrameConstructionID == MachineOutlinerTailCall)
  return;

// We're a normal call, so our sequence doesn't have a return instruction.
// Add it in.
MachineInstr *retq = BuildMI(MF, DebugLoc(), get(X86::RETQ));
MBB.insert(MBB.end(), retq);
9107}

9109MachineBasicBlock::iterator
9110X86InstrInfo::insertOutlinedCall(Module &M, MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator &It,
                               MachineFunction &MF,
                               const outliner::Candidate &C) const {
// Is it a tail call?
if (C.CallConstructionID == MachineOutlinerTailCall) {
  // Yes, just insert a JMP.
  It = MBB.insert(It,
                BuildMI(MF, DebugLoc(), get(X86::TAILJMPd64))
                    .addGlobalAddress(M.getNamedValue(MF.getName())));
} else {
  // No, insert a call.
  It = MBB.insert(It,
                BuildMI(MF, DebugLoc(), get(X86::CALL64pcrel32))
                    .addGlobalAddress(M.getNamedValue(MF.getName())));
}

return It;
9128}

9130#define GET_INSTRINFO_HELPERS
9131#include "X86GenInstrInfo.inc"