Bug Summary

File:src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
Warning:line 1114, column 10
Called C++ object pointer is null

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 LegalizeIntegerTypes.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 pic -pic-level 1 -fhalf-no-semantic-interposition -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" -D PIC -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 -D_RET_PROTECTOR -ret-protector -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/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp

/usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp

→
1//===----- LegalizeIntegerTypes.cpp - Legalization of integer types -------===//
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 implements integer type expansion and promotion for LegalizeTypes.
10// Promotion is the act of changing a computation in an illegal type into a
11// computation in a larger type. For example, implementing i8 arithmetic in an
12// i32 register (often needed on powerpc).
13// Expansion is the act of changing a computation in an illegal type into a
14// computation in two identical registers of a smaller type. For example,
15// implementing i64 arithmetic in two i32 registers (often needed on 32-bit
16// targets).
17//
18//===----------------------------------------------------------------------===//
19
20#include "LegalizeTypes.h"
21#include "llvm/Analysis/TargetLibraryInfo.h"
22#include "llvm/IR/DerivedTypes.h"
23#include "llvm/Support/ErrorHandling.h"
24#include "llvm/Support/KnownBits.h"
25#include "llvm/Support/raw_ostream.h"
26using namespace llvm;
27
28#define DEBUG_TYPE"legalize-types" "legalize-types"
29
30//===----------------------------------------------------------------------===//
31// Integer Result Promotion
32//===----------------------------------------------------------------------===//
33
34/// PromoteIntegerResult - This method is called when a result of a node is
35/// found to be in need of promotion to a larger type. At this point, the node
36/// may also have invalid operands or may have other results that need
37/// expansion, we just know that (at least) one result needs promotion.
38void DAGTypeLegalizer::PromoteIntegerResult(SDNode *N, unsigned ResNo) {
39 LLVM_DEBUG(dbgs() << "Promote integer result: "; N->dump(&DAG);do { } while (false)
40 dbgs() << "\n")do { } while (false);
41 SDValue Res = SDValue();
42
43 // See if the target wants to custom expand this node.
44 if (CustomLowerNode(N, N->getValueType(ResNo), true)) {
45 LLVM_DEBUG(dbgs() << "Node has been custom expanded, done\n")do { } while (false);
46 return;
47 }
48
49 switch (N->getOpcode()) {
50 default:
51#ifndef NDEBUG1
52 dbgs() << "PromoteIntegerResult #" << ResNo << ": ";
53 N->dump(&DAG); dbgs() << "\n";
54#endif
55 llvm_unreachable("Do not know how to promote this operator!")__builtin_unreachable();
56 case ISD::MERGE_VALUES:Res = PromoteIntRes_MERGE_VALUES(N, ResNo); break;
57 case ISD::AssertSext: Res = PromoteIntRes_AssertSext(N); break;
58 case ISD::AssertZext: Res = PromoteIntRes_AssertZext(N); break;
59 case ISD::BITCAST: Res = PromoteIntRes_BITCAST(N); break;
60 case ISD::BITREVERSE: Res = PromoteIntRes_BITREVERSE(N); break;
61 case ISD::BSWAP: Res = PromoteIntRes_BSWAP(N); break;
62 case ISD::BUILD_PAIR: Res = PromoteIntRes_BUILD_PAIR(N); break;
63 case ISD::Constant: Res = PromoteIntRes_Constant(N); break;
64 case ISD::CTLZ_ZERO_UNDEF:
65 case ISD::CTLZ: Res = PromoteIntRes_CTLZ(N); break;
66 case ISD::PARITY:
67 case ISD::CTPOP: Res = PromoteIntRes_CTPOP_PARITY(N); break;
68 case ISD::CTTZ_ZERO_UNDEF:
69 case ISD::CTTZ: Res = PromoteIntRes_CTTZ(N); break;
70 case ISD::EXTRACT_VECTOR_ELT:
71 Res = PromoteIntRes_EXTRACT_VECTOR_ELT(N); break;
72 case ISD::LOAD: Res = PromoteIntRes_LOAD(cast<LoadSDNode>(N)); break;
73 case ISD::MLOAD: Res = PromoteIntRes_MLOAD(cast<MaskedLoadSDNode>(N));
74 break;
75 case ISD::MGATHER: Res = PromoteIntRes_MGATHER(cast<MaskedGatherSDNode>(N));
76 break;
77 case ISD::SELECT: Res = PromoteIntRes_SELECT(N); break;
78 case ISD::VSELECT: Res = PromoteIntRes_VSELECT(N); break;
79 case ISD::SELECT_CC: Res = PromoteIntRes_SELECT_CC(N); break;
80 case ISD::STRICT_FSETCC:
81 case ISD::STRICT_FSETCCS:
82 case ISD::SETCC: Res = PromoteIntRes_SETCC(N); break;
83 case ISD::SMIN:
84 case ISD::SMAX: Res = PromoteIntRes_SExtIntBinOp(N); break;
85 case ISD::UMIN:
86 case ISD::UMAX: Res = PromoteIntRes_UMINUMAX(N); break;
87
88 case ISD::SHL: Res = PromoteIntRes_SHL(N); break;
89 case ISD::SIGN_EXTEND_INREG:
90 Res = PromoteIntRes_SIGN_EXTEND_INREG(N); break;
91 case ISD::SRA: Res = PromoteIntRes_SRA(N); break;
92 case ISD::SRL: Res = PromoteIntRes_SRL(N); break;
93 case ISD::TRUNCATE: Res = PromoteIntRes_TRUNCATE(N); break;
94 case ISD::UNDEF: Res = PromoteIntRes_UNDEF(N); break;
95 case ISD::VAARG: Res = PromoteIntRes_VAARG(N); break;
96 case ISD::VSCALE: Res = PromoteIntRes_VSCALE(N); break;
97
98 case ISD::EXTRACT_SUBVECTOR:
99 Res = PromoteIntRes_EXTRACT_SUBVECTOR(N); break;
100 case ISD::INSERT_SUBVECTOR:
101 Res = PromoteIntRes_INSERT_SUBVECTOR(N); break;
102 case ISD::VECTOR_REVERSE:
103 Res = PromoteIntRes_VECTOR_REVERSE(N); break;
104 case ISD::VECTOR_SHUFFLE:
105 Res = PromoteIntRes_VECTOR_SHUFFLE(N); break;
106 case ISD::VECTOR_SPLICE:
107 Res = PromoteIntRes_VECTOR_SPLICE(N); break;
108 case ISD::INSERT_VECTOR_ELT:
109 Res = PromoteIntRes_INSERT_VECTOR_ELT(N); break;
110 case ISD::BUILD_VECTOR:
111 Res = PromoteIntRes_BUILD_VECTOR(N); break;
112 case ISD::SCALAR_TO_VECTOR:
113 Res = PromoteIntRes_SCALAR_TO_VECTOR(N); break;
114 case ISD::SPLAT_VECTOR:
115 Res = PromoteIntRes_SPLAT_VECTOR(N); break;
116 case ISD::STEP_VECTOR: Res = PromoteIntRes_STEP_VECTOR(N); break;
117 case ISD::CONCAT_VECTORS:
118 Res = PromoteIntRes_CONCAT_VECTORS(N); break;
119
120 case ISD::ANY_EXTEND_VECTOR_INREG:
121 case ISD::SIGN_EXTEND_VECTOR_INREG:
122 case ISD::ZERO_EXTEND_VECTOR_INREG:
123 Res = PromoteIntRes_EXTEND_VECTOR_INREG(N); break;
124
125 case ISD::SIGN_EXTEND:
126 case ISD::ZERO_EXTEND:
127 case ISD::ANY_EXTEND: Res = PromoteIntRes_INT_EXTEND(N); break;
128
129 case ISD::STRICT_FP_TO_SINT:
130 case ISD::STRICT_FP_TO_UINT:
131 case ISD::FP_TO_SINT:
132 case ISD::FP_TO_UINT: Res = PromoteIntRes_FP_TO_XINT(N); break;
133
134 case ISD::FP_TO_SINT_SAT:
135 case ISD::FP_TO_UINT_SAT:
136 Res = PromoteIntRes_FP_TO_XINT_SAT(N); break;
137
138 case ISD::FP_TO_FP16: Res = PromoteIntRes_FP_TO_FP16(N); break;
139
140 case ISD::FLT_ROUNDS_: Res = PromoteIntRes_FLT_ROUNDS(N); break;
141
142 case ISD::AND:
143 case ISD::OR:
144 case ISD::XOR:
145 case ISD::ADD:
146 case ISD::SUB:
147 case ISD::MUL: Res = PromoteIntRes_SimpleIntBinOp(N); break;
148
149 case ISD::SDIV:
150 case ISD::SREM: Res = PromoteIntRes_SExtIntBinOp(N); break;
151
152 case ISD::UDIV:
153 case ISD::UREM: Res = PromoteIntRes_ZExtIntBinOp(N); break;
154
155 case ISD::SADDO:
156 case ISD::SSUBO: Res = PromoteIntRes_SADDSUBO(N, ResNo); break;
157 case ISD::UADDO:
158 case ISD::USUBO: Res = PromoteIntRes_UADDSUBO(N, ResNo); break;
159 case ISD::SMULO:
160 case ISD::UMULO: Res = PromoteIntRes_XMULO(N, ResNo); break;
161
162 case ISD::ADDE:
163 case ISD::SUBE:
164 case ISD::ADDCARRY:
165 case ISD::SUBCARRY: Res = PromoteIntRes_ADDSUBCARRY(N, ResNo); break;
166
167 case ISD::SADDO_CARRY:
168 case ISD::SSUBO_CARRY: Res = PromoteIntRes_SADDSUBO_CARRY(N, ResNo); break;
169
170 case ISD::SADDSAT:
171 case ISD::UADDSAT:
172 case ISD::SSUBSAT:
173 case ISD::USUBSAT:
174 case ISD::SSHLSAT:
175 case ISD::USHLSAT: Res = PromoteIntRes_ADDSUBSHLSAT(N); break;
176
177 case ISD::SMULFIX:
178 case ISD::SMULFIXSAT:
179 case ISD::UMULFIX:
180 case ISD::UMULFIXSAT: Res = PromoteIntRes_MULFIX(N); break;
181
182 case ISD::SDIVFIX:
183 case ISD::SDIVFIXSAT:
184 case ISD::UDIVFIX:
185 case ISD::UDIVFIXSAT: Res = PromoteIntRes_DIVFIX(N); break;
186
187 case ISD::ABS: Res = PromoteIntRes_ABS(N); break;
188
189 case ISD::ATOMIC_LOAD:
190 Res = PromoteIntRes_Atomic0(cast<AtomicSDNode>(N)); break;
191
192 case ISD::ATOMIC_LOAD_ADD:
193 case ISD::ATOMIC_LOAD_SUB:
194 case ISD::ATOMIC_LOAD_AND:
195 case ISD::ATOMIC_LOAD_CLR:
196 case ISD::ATOMIC_LOAD_OR:
197 case ISD::ATOMIC_LOAD_XOR:
198 case ISD::ATOMIC_LOAD_NAND:
199 case ISD::ATOMIC_LOAD_MIN:
200 case ISD::ATOMIC_LOAD_MAX:
201 case ISD::ATOMIC_LOAD_UMIN:
202 case ISD::ATOMIC_LOAD_UMAX:
203 case ISD::ATOMIC_SWAP:
204 Res = PromoteIntRes_Atomic1(cast<AtomicSDNode>(N)); break;
205
206 case ISD::ATOMIC_CMP_SWAP:
207 case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS:
208 Res = PromoteIntRes_AtomicCmpSwap(cast<AtomicSDNode>(N), ResNo);
209 break;
210
211 case ISD::VECREDUCE_ADD:
212 case ISD::VECREDUCE_MUL:
213 case ISD::VECREDUCE_AND:
214 case ISD::VECREDUCE_OR:
215 case ISD::VECREDUCE_XOR:
216 case ISD::VECREDUCE_SMAX:
217 case ISD::VECREDUCE_SMIN:
218 case ISD::VECREDUCE_UMAX:
219 case ISD::VECREDUCE_UMIN:
220 Res = PromoteIntRes_VECREDUCE(N);
221 break;
222
223 case ISD::FREEZE:
224 Res = PromoteIntRes_FREEZE(N);
225 break;
226
227 case ISD::ROTL:
228 case ISD::ROTR:
229 Res = PromoteIntRes_Rotate(N);
230 break;
231
232 case ISD::FSHL:
233 case ISD::FSHR:
234 Res = PromoteIntRes_FunnelShift(N);
235 break;
236 }
237
238 // If the result is null then the sub-method took care of registering it.
239 if (Res.getNode())
240 SetPromotedInteger(SDValue(N, ResNo), Res);
241}
242
243SDValue DAGTypeLegalizer::PromoteIntRes_MERGE_VALUES(SDNode *N,
244 unsigned ResNo) {
245 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
246 return GetPromotedInteger(Op);
247}
248
249SDValue DAGTypeLegalizer::PromoteIntRes_AssertSext(SDNode *N) {
250 // Sign-extend the new bits, and continue the assertion.
251 SDValue Op = SExtPromotedInteger(N->getOperand(0));
252 return DAG.getNode(ISD::AssertSext, SDLoc(N),
253 Op.getValueType(), Op, N->getOperand(1));
254}
255
256SDValue DAGTypeLegalizer::PromoteIntRes_AssertZext(SDNode *N) {
257 // Zero the new bits, and continue the assertion.
258 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
259 return DAG.getNode(ISD::AssertZext, SDLoc(N),
260 Op.getValueType(), Op, N->getOperand(1));
261}
262
263SDValue DAGTypeLegalizer::PromoteIntRes_Atomic0(AtomicSDNode *N) {
264 EVT ResVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
265 SDValue Res = DAG.getAtomic(N->getOpcode(), SDLoc(N),
266 N->getMemoryVT(), ResVT,
267 N->getChain(), N->getBasePtr(),
268 N->getMemOperand());
269 // Legalize the chain result - switch anything that used the old chain to
270 // use the new one.
271 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
272 return Res;
273}
274
275SDValue DAGTypeLegalizer::PromoteIntRes_Atomic1(AtomicSDNode *N) {
276 SDValue Op2 = GetPromotedInteger(N->getOperand(2));
277 SDValue Res = DAG.getAtomic(N->getOpcode(), SDLoc(N),
278 N->getMemoryVT(),
279 N->getChain(), N->getBasePtr(),
280 Op2, N->getMemOperand());
281 // Legalize the chain result - switch anything that used the old chain to
282 // use the new one.
283 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
284 return Res;
285}
286
287SDValue DAGTypeLegalizer::PromoteIntRes_AtomicCmpSwap(AtomicSDNode *N,
288 unsigned ResNo) {
289 if (ResNo == 1) {
290 assert(N->getOpcode() == ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS)((void)0);
291 EVT SVT = getSetCCResultType(N->getOperand(2).getValueType());
292 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(1));
293
294 // Only use the result of getSetCCResultType if it is legal,
295 // otherwise just use the promoted result type (NVT).
296 if (!TLI.isTypeLegal(SVT))
297 SVT = NVT;
298
299 SDVTList VTs = DAG.getVTList(N->getValueType(0), SVT, MVT::Other);
300 SDValue Res = DAG.getAtomicCmpSwap(
301 ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, SDLoc(N), N->getMemoryVT(), VTs,
302 N->getChain(), N->getBasePtr(), N->getOperand(2), N->getOperand(3),
303 N->getMemOperand());
304 ReplaceValueWith(SDValue(N, 0), Res.getValue(0));
305 ReplaceValueWith(SDValue(N, 2), Res.getValue(2));
306 return Res.getValue(1);
307 }
308
309 // Op2 is used for the comparison and thus must be extended according to the
310 // target's atomic operations. Op3 is merely stored and so can be left alone.
311 SDValue Op2 = N->getOperand(2);
312 SDValue Op3 = GetPromotedInteger(N->getOperand(3));
313 switch (TLI.getExtendForAtomicCmpSwapArg()) {
314 case ISD::SIGN_EXTEND:
315 Op2 = SExtPromotedInteger(Op2);
316 break;
317 case ISD::ZERO_EXTEND:
318 Op2 = ZExtPromotedInteger(Op2);
319 break;
320 case ISD::ANY_EXTEND:
321 Op2 = GetPromotedInteger(Op2);
322 break;
323 default:
324 llvm_unreachable("Invalid atomic op extension")__builtin_unreachable();
325 }
326
327 SDVTList VTs =
328 DAG.getVTList(Op2.getValueType(), N->getValueType(1), MVT::Other);
329 SDValue Res = DAG.getAtomicCmpSwap(
330 N->getOpcode(), SDLoc(N), N->getMemoryVT(), VTs, N->getChain(),
331 N->getBasePtr(), Op2, Op3, N->getMemOperand());
332 // Update the use to N with the newly created Res.
333 for (unsigned i = 1, NumResults = N->getNumValues(); i < NumResults; ++i)
334 ReplaceValueWith(SDValue(N, i), Res.getValue(i));
335 return Res;
336}
337
338SDValue DAGTypeLegalizer::PromoteIntRes_BITCAST(SDNode *N) {
339 SDValue InOp = N->getOperand(0);
340 EVT InVT = InOp.getValueType();
341 EVT NInVT = TLI.getTypeToTransformTo(*DAG.getContext(), InVT);
342 EVT OutVT = N->getValueType(0);
343 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
344 SDLoc dl(N);
345
346 switch (getTypeAction(InVT)) {
347 case TargetLowering::TypeLegal:
348 break;
349 case TargetLowering::TypePromoteInteger:
350 if (NOutVT.bitsEq(NInVT) && !NOutVT.isVector() && !NInVT.isVector())
351 // The input promotes to the same size. Convert the promoted value.
352 return DAG.getNode(ISD::BITCAST, dl, NOutVT, GetPromotedInteger(InOp));
353 break;
354 case TargetLowering::TypeSoftenFloat:
355 // Promote the integer operand by hand.
356 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT, GetSoftenedFloat(InOp));
357 case TargetLowering::TypeSoftPromoteHalf:
358 // Promote the integer operand by hand.
359 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT, GetSoftPromotedHalf(InOp));
360 case TargetLowering::TypePromoteFloat: {
361 // Convert the promoted float by hand.
362 if (!NOutVT.isVector())
363 return DAG.getNode(ISD::FP_TO_FP16, dl, NOutVT, GetPromotedFloat(InOp));
364 break;
365 }
366 case TargetLowering::TypeExpandInteger:
367 case TargetLowering::TypeExpandFloat:
368 break;
369 case TargetLowering::TypeScalarizeVector:
370 // Convert the element to an integer and promote it by hand.
371 if (!NOutVT.isVector())
372 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT,
373 BitConvertToInteger(GetScalarizedVector(InOp)));
374 break;
375 case TargetLowering::TypeScalarizeScalableVector:
376 report_fatal_error("Scalarization of scalable vectors is not supported.");
377 case TargetLowering::TypeSplitVector: {
378 if (!NOutVT.isVector()) {
379 // For example, i32 = BITCAST v2i16 on alpha. Convert the split
380 // pieces of the input into integers and reassemble in the final type.
381 SDValue Lo, Hi;
382 GetSplitVector(N->getOperand(0), Lo, Hi);
383 Lo = BitConvertToInteger(Lo);
384 Hi = BitConvertToInteger(Hi);
385
386 if (DAG.getDataLayout().isBigEndian())
387 std::swap(Lo, Hi);
388
389 InOp = DAG.getNode(ISD::ANY_EXTEND, dl,
390 EVT::getIntegerVT(*DAG.getContext(),
391 NOutVT.getSizeInBits()),
392 JoinIntegers(Lo, Hi));
393 return DAG.getNode(ISD::BITCAST, dl, NOutVT, InOp);
394 }
395 break;
396 }
397 case TargetLowering::TypeWidenVector:
398 // The input is widened to the same size. Convert to the widened value.
399 // Make sure that the outgoing value is not a vector, because this would
400 // make us bitcast between two vectors which are legalized in different ways.
401 if (NOutVT.bitsEq(NInVT) && !NOutVT.isVector()) {
402 SDValue Res =
403 DAG.getNode(ISD::BITCAST, dl, NOutVT, GetWidenedVector(InOp));
404
405 // For big endian targets we need to shift the casted value or the
406 // interesting bits will end up at the wrong place.
407 if (DAG.getDataLayout().isBigEndian()) {
408 unsigned ShiftAmt = NInVT.getSizeInBits() - InVT.getSizeInBits();
409 EVT ShiftAmtTy = TLI.getShiftAmountTy(NOutVT, DAG.getDataLayout());
410 assert(ShiftAmt < NOutVT.getSizeInBits() && "Too large shift amount!")((void)0);
411 Res = DAG.getNode(ISD::SRL, dl, NOutVT, Res,
412 DAG.getConstant(ShiftAmt, dl, ShiftAmtTy));
413 }
414 return Res;
415 }
416 // If the output type is also a vector and widening it to the same size
417 // as the widened input type would be a legal type, we can widen the bitcast
418 // and handle the promotion after.
419 if (NOutVT.isVector()) {
420 unsigned WidenInSize = NInVT.getSizeInBits();
421 unsigned OutSize = OutVT.getSizeInBits();
422 if (WidenInSize % OutSize == 0) {
423 unsigned Scale = WidenInSize / OutSize;
424 EVT WideOutVT = EVT::getVectorVT(*DAG.getContext(),
425 OutVT.getVectorElementType(),
426 OutVT.getVectorNumElements() * Scale);
427 if (isTypeLegal(WideOutVT)) {
428 InOp = DAG.getBitcast(WideOutVT, GetWidenedVector(InOp));
429 InOp = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OutVT, InOp,
430 DAG.getVectorIdxConstant(0, dl));
431 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT, InOp);
432 }
433 }
434 }
435 }
436
437 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT,
438 CreateStackStoreLoad(InOp, OutVT));
439}
440
441// Helper for BSWAP/BITREVERSE promotion to ensure we can fit any shift amount
442// in the VT returned by getShiftAmountTy and to return a safe VT if we can't.
443static EVT getShiftAmountTyForConstant(EVT VT, const TargetLowering &TLI,
444 SelectionDAG &DAG) {
445 EVT ShiftVT = TLI.getShiftAmountTy(VT, DAG.getDataLayout());
446 // If any possible shift value won't fit in the prefered type, just use
447 // something safe. It will be legalized when the shift is expanded.
448 if (!ShiftVT.isVector() &&
449 ShiftVT.getSizeInBits() < Log2_32_Ceil(VT.getSizeInBits()))
450 ShiftVT = MVT::i32;
451 return ShiftVT;
452}
453
454SDValue DAGTypeLegalizer::PromoteIntRes_FREEZE(SDNode *N) {
455 SDValue V = GetPromotedInteger(N->getOperand(0));
456 return DAG.getNode(ISD::FREEZE, SDLoc(N),
457 V.getValueType(), V);
458}
459
460SDValue DAGTypeLegalizer::PromoteIntRes_BSWAP(SDNode *N) {
461 SDValue Op = GetPromotedInteger(N->getOperand(0));
462 EVT OVT = N->getValueType(0);
463 EVT NVT = Op.getValueType();
464 SDLoc dl(N);
465
466 // If the larger BSWAP isn't supported by the target, try to expand now.
467 // If we expand later we'll end up with more operations since we lost the
468 // original type. We only do this for scalars since we have a shuffle
469 // based lowering for vectors in LegalizeVectorOps.
470 if (!OVT.isVector() &&
471 !TLI.isOperationLegalOrCustomOrPromote(ISD::BSWAP, NVT)) {
472 if (SDValue Res = TLI.expandBSWAP(N, DAG))
473 return DAG.getNode(ISD::ANY_EXTEND, dl, NVT, Res);
474 }
475
476 unsigned DiffBits = NVT.getScalarSizeInBits() - OVT.getScalarSizeInBits();
477 EVT ShiftVT = getShiftAmountTyForConstant(NVT, TLI, DAG);
478 return DAG.getNode(ISD::SRL, dl, NVT, DAG.getNode(ISD::BSWAP, dl, NVT, Op),
479 DAG.getConstant(DiffBits, dl, ShiftVT));
480}
481
482SDValue DAGTypeLegalizer::PromoteIntRes_BITREVERSE(SDNode *N) {
483 SDValue Op = GetPromotedInteger(N->getOperand(0));
484 EVT OVT = N->getValueType(0);
485 EVT NVT = Op.getValueType();
486 SDLoc dl(N);
487
488 // If the larger BITREVERSE isn't supported by the target, try to expand now.
489 // If we expand later we'll end up with more operations since we lost the
490 // original type. We only do this for scalars since we have a shuffle
491 // based lowering for vectors in LegalizeVectorOps.
492 if (!OVT.isVector() && OVT.isSimple() &&
493 !TLI.isOperationLegalOrCustomOrPromote(ISD::BITREVERSE, NVT)) {
494 if (SDValue Res = TLI.expandBITREVERSE(N, DAG))
495 return DAG.getNode(ISD::ANY_EXTEND, dl, NVT, Res);
496 }
497
498 unsigned DiffBits = NVT.getScalarSizeInBits() - OVT.getScalarSizeInBits();
499 EVT ShiftVT = getShiftAmountTyForConstant(NVT, TLI, DAG);
500 return DAG.getNode(ISD::SRL, dl, NVT,
501 DAG.getNode(ISD::BITREVERSE, dl, NVT, Op),
502 DAG.getConstant(DiffBits, dl, ShiftVT));
503}
504
505SDValue DAGTypeLegalizer::PromoteIntRes_BUILD_PAIR(SDNode *N) {
506 // The pair element type may be legal, or may not promote to the same type as
507 // the result, for example i14 = BUILD_PAIR (i7, i7). Handle all cases.
508 return DAG.getNode(ISD::ANY_EXTEND, SDLoc(N),
509 TLI.getTypeToTransformTo(*DAG.getContext(),
510 N->getValueType(0)), JoinIntegers(N->getOperand(0),
511 N->getOperand(1)));
512}
513
514SDValue DAGTypeLegalizer::PromoteIntRes_Constant(SDNode *N) {
515 EVT VT = N->getValueType(0);
516 // FIXME there is no actual debug info here
517 SDLoc dl(N);
518 // Zero extend things like i1, sign extend everything else. It shouldn't
519 // matter in theory which one we pick, but this tends to give better code?
520 unsigned Opc = VT.isByteSized() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
521 SDValue Result = DAG.getNode(Opc, dl,
522 TLI.getTypeToTransformTo(*DAG.getContext(), VT),
523 SDValue(N, 0));
524 assert(isa<ConstantSDNode>(Result) && "Didn't constant fold ext?")((void)0);
525 return Result;
526}
527
528SDValue DAGTypeLegalizer::PromoteIntRes_CTLZ(SDNode *N) {
529 // Zero extend to the promoted type and do the count there.
530 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
531 SDLoc dl(N);
532 EVT OVT = N->getValueType(0);
533 EVT NVT = Op.getValueType();
534 Op = DAG.getNode(N->getOpcode(), dl, NVT, Op);
535 // Subtract off the extra leading bits in the bigger type.
536 return DAG.getNode(
537 ISD::SUB, dl, NVT, Op,
538 DAG.getConstant(NVT.getScalarSizeInBits() - OVT.getScalarSizeInBits(), dl,
539 NVT));
540}
541
542SDValue DAGTypeLegalizer::PromoteIntRes_CTPOP_PARITY(SDNode *N) {
543 // Zero extend to the promoted type and do the count or parity there.
544 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
545 return DAG.getNode(N->getOpcode(), SDLoc(N), Op.getValueType(), Op);
546}
547
548SDValue DAGTypeLegalizer::PromoteIntRes_CTTZ(SDNode *N) {
549 SDValue Op = GetPromotedInteger(N->getOperand(0));
550 EVT OVT = N->getValueType(0);
551 EVT NVT = Op.getValueType();
552 SDLoc dl(N);
553 if (N->getOpcode() == ISD::CTTZ) {
554 // The count is the same in the promoted type except if the original
555 // value was zero. This can be handled by setting the bit just off
556 // the top of the original type.
557 auto TopBit = APInt::getOneBitSet(NVT.getScalarSizeInBits(),
558 OVT.getScalarSizeInBits());
559 Op = DAG.getNode(ISD::OR, dl, NVT, Op, DAG.getConstant(TopBit, dl, NVT));
560 }
561 return DAG.getNode(N->getOpcode(), dl, NVT, Op);
562}
563
564SDValue DAGTypeLegalizer::PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N) {
565 SDLoc dl(N);
566 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
567
568 SDValue Op0 = N->getOperand(0);
569 SDValue Op1 = N->getOperand(1);
570
571 // If the input also needs to be promoted, do that first so we can get a
572 // get a good idea for the output type.
573 if (TLI.getTypeAction(*DAG.getContext(), Op0.getValueType())
574 == TargetLowering::TypePromoteInteger) {
575 SDValue In = GetPromotedInteger(Op0);
576
577 // If the new type is larger than NVT, use it. We probably won't need to
578 // promote it again.
579 EVT SVT = In.getValueType().getScalarType();
580 if (SVT.bitsGE(NVT)) {
581 SDValue Ext = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, SVT, In, Op1);
582 return DAG.getAnyExtOrTrunc(Ext, dl, NVT);
583 }
584 }
585
586 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, NVT, Op0, Op1);
587}
588
589SDValue DAGTypeLegalizer::PromoteIntRes_FP_TO_XINT(SDNode *N) {
590 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
591 unsigned NewOpc = N->getOpcode();
592 SDLoc dl(N);
593
594 // If we're promoting a UINT to a larger size and the larger FP_TO_UINT is
595 // not Legal, check to see if we can use FP_TO_SINT instead. (If both UINT
596 // and SINT conversions are Custom, there is no way to tell which is
597 // preferable. We choose SINT because that's the right thing on PPC.)
598 if (N->getOpcode() == ISD::FP_TO_UINT &&
599 !TLI.isOperationLegal(ISD::FP_TO_UINT, NVT) &&
600 TLI.isOperationLegalOrCustom(ISD::FP_TO_SINT, NVT))
601 NewOpc = ISD::FP_TO_SINT;
602
603 if (N->getOpcode() == ISD::STRICT_FP_TO_UINT &&
604 !TLI.isOperationLegal(ISD::STRICT_FP_TO_UINT, NVT) &&
605 TLI.isOperationLegalOrCustom(ISD::STRICT_FP_TO_SINT, NVT))
606 NewOpc = ISD::STRICT_FP_TO_SINT;
607
608 SDValue Res;
609 if (N->isStrictFPOpcode()) {
610 Res = DAG.getNode(NewOpc, dl, {NVT, MVT::Other},
611 {N->getOperand(0), N->getOperand(1)});
612 // Legalize the chain result - switch anything that used the old chain to
613 // use the new one.
614 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
615 } else
616 Res = DAG.getNode(NewOpc, dl, NVT, N->getOperand(0));
617
618 // Assert that the converted value fits in the original type. If it doesn't
619 // (eg: because the value being converted is too big), then the result of the
620 // original operation was undefined anyway, so the assert is still correct.
621 //
622 // NOTE: fp-to-uint to fp-to-sint promotion guarantees zero extend. For example:
623 // before legalization: fp-to-uint16, 65534. -> 0xfffe
624 // after legalization: fp-to-sint32, 65534. -> 0x0000fffe
625 return DAG.getNode((N->getOpcode() == ISD::FP_TO_UINT ||
626 N->getOpcode() == ISD::STRICT_FP_TO_UINT) ?
627 ISD::AssertZext : ISD::AssertSext, dl, NVT, Res,
628 DAG.getValueType(N->getValueType(0).getScalarType()));
629}
630
631SDValue DAGTypeLegalizer::PromoteIntRes_FP_TO_XINT_SAT(SDNode *N) {
632 // Promote the result type, while keeping the original width in Op1.
633 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
634 SDLoc dl(N);
635 return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0),
636 N->getOperand(1));
637}
638
639SDValue DAGTypeLegalizer::PromoteIntRes_FP_TO_FP16(SDNode *N) {
640 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
641 SDLoc dl(N);
642
643 return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0));
644}
645
646SDValue DAGTypeLegalizer::PromoteIntRes_FLT_ROUNDS(SDNode *N) {
647 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
648 SDLoc dl(N);
649
650 SDValue Res =
651 DAG.getNode(N->getOpcode(), dl, {NVT, MVT::Other}, N->getOperand(0));
652
653 // Legalize the chain result - switch anything that used the old chain to
654 // use the new one.
655 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
656 return Res;
657}
658
659SDValue DAGTypeLegalizer::PromoteIntRes_INT_EXTEND(SDNode *N) {
660 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
661 SDLoc dl(N);
662
663 if (getTypeAction(N->getOperand(0).getValueType())
664 == TargetLowering::TypePromoteInteger) {
665 SDValue Res = GetPromotedInteger(N->getOperand(0));
666 assert(Res.getValueType().bitsLE(NVT) && "Extension doesn't make sense!")((void)0);
667
668 // If the result and operand types are the same after promotion, simplify
669 // to an in-register extension.
670 if (NVT == Res.getValueType()) {
671 // The high bits are not guaranteed to be anything. Insert an extend.
672 if (N->getOpcode() == ISD::SIGN_EXTEND)
673 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NVT, Res,
674 DAG.getValueType(N->getOperand(0).getValueType()));
675 if (N->getOpcode() == ISD::ZERO_EXTEND)
676 return DAG.getZeroExtendInReg(Res, dl, N->getOperand(0).getValueType());
677 assert(N->getOpcode() == ISD::ANY_EXTEND && "Unknown integer extension!")((void)0);
678 return Res;
679 }
680 }
681
682 // Otherwise, just extend the original operand all the way to the larger type.
683 return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0));
684}
685
686SDValue DAGTypeLegalizer::PromoteIntRes_LOAD(LoadSDNode *N) {
687 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!")((void)0);
688 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
689 ISD::LoadExtType ExtType =
690 ISD::isNON_EXTLoad(N) ? ISD::EXTLOAD : N->getExtensionType();
691 SDLoc dl(N);
692 SDValue Res = DAG.getExtLoad(ExtType, dl, NVT, N->getChain(), N->getBasePtr(),
693 N->getMemoryVT(), N->getMemOperand());
694
695 // Legalize the chain result - switch anything that used the old chain to
696 // use the new one.
697 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
698 return Res;
699}
700
701SDValue DAGTypeLegalizer::PromoteIntRes_MLOAD(MaskedLoadSDNode *N) {
702 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
703 SDValue ExtPassThru = GetPromotedInteger(N->getPassThru());
704
705 SDLoc dl(N);
706 SDValue Res = DAG.getMaskedLoad(NVT, dl, N->getChain(), N->getBasePtr(),
707 N->getOffset(), N->getMask(), ExtPassThru,
708 N->getMemoryVT(), N->getMemOperand(),
709 N->getAddressingMode(), ISD::EXTLOAD);
710 // Legalize the chain result - switch anything that used the old chain to
711 // use the new one.
712 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
713 return Res;
714}
715
716SDValue DAGTypeLegalizer::PromoteIntRes_MGATHER(MaskedGatherSDNode *N) {
717 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
718 SDValue ExtPassThru = GetPromotedInteger(N->getPassThru());
719 assert(NVT == ExtPassThru.getValueType() &&((void)0)
720 "Gather result type and the passThru argument type should be the same")((void)0);
721
722 ISD::LoadExtType ExtType = N->getExtensionType();
723 if (ExtType == ISD::NON_EXTLOAD)
724 ExtType = ISD::EXTLOAD;
725
726 SDLoc dl(N);
727 SDValue Ops[] = {N->getChain(), ExtPassThru, N->getMask(), N->getBasePtr(),
728 N->getIndex(), N->getScale() };
729 SDValue Res = DAG.getMaskedGather(DAG.getVTList(NVT, MVT::Other),
730 N->getMemoryVT(), dl, Ops,
731 N->getMemOperand(), N->getIndexType(),
732 ExtType);
733 // Legalize the chain result - switch anything that used the old chain to
734 // use the new one.
735 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
736 return Res;
737}
738
739/// Promote the overflow flag of an overflowing arithmetic node.
740SDValue DAGTypeLegalizer::PromoteIntRes_Overflow(SDNode *N) {
741 // Change the return type of the boolean result while obeying
742 // getSetCCResultType.
743 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(1));
744 EVT VT = N->getValueType(0);
745 EVT SVT = getSetCCResultType(VT);
746 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1) };
747 unsigned NumOps = N->getNumOperands();
748 assert(NumOps <= 3 && "Too many operands")((void)0);
749 if (NumOps == 3)
750 Ops[2] = N->getOperand(2);
751
752 SDLoc dl(N);
753 SDValue Res = DAG.getNode(N->getOpcode(), dl, DAG.getVTList(VT, SVT),
754 makeArrayRef(Ops, NumOps));
755
756 // Modified the sum result - switch anything that used the old sum to use
757 // the new one.
758 ReplaceValueWith(SDValue(N, 0), Res);
759
760 // Convert to the expected type.
761 return DAG.getBoolExtOrTrunc(Res.getValue(1), dl, NVT, VT);
762}
763
764SDValue DAGTypeLegalizer::PromoteIntRes_ADDSUBSHLSAT(SDNode *N) {
765 // If the promoted type is legal, we can convert this to:
766 // 1. ANY_EXTEND iN to iM
767 // 2. SHL by M-N
768 // 3. [US][ADD|SUB|SHL]SAT
769 // 4. L/ASHR by M-N
770 // Else it is more efficient to convert this to a min and a max
771 // operation in the higher precision arithmetic.
772 SDLoc dl(N);
773 SDValue Op1 = N->getOperand(0);
774 SDValue Op2 = N->getOperand(1);
775 unsigned OldBits = Op1.getScalarValueSizeInBits();
776
777 unsigned Opcode = N->getOpcode();
778 bool IsShift = Opcode == ISD::USHLSAT || Opcode == ISD::SSHLSAT;
779
780 SDValue Op1Promoted, Op2Promoted;
781 if (IsShift) {
782 Op1Promoted = GetPromotedInteger(Op1);
783 Op2Promoted = ZExtPromotedInteger(Op2);
784 } else if (Opcode == ISD::UADDSAT || Opcode == ISD::USUBSAT) {
785 Op1Promoted = ZExtPromotedInteger(Op1);
786 Op2Promoted = ZExtPromotedInteger(Op2);
787 } else {
788 Op1Promoted = SExtPromotedInteger(Op1);
789 Op2Promoted = SExtPromotedInteger(Op2);
790 }
791 EVT PromotedType = Op1Promoted.getValueType();
792 unsigned NewBits = PromotedType.getScalarSizeInBits();
793
794 if (Opcode == ISD::UADDSAT) {
795 APInt MaxVal = APInt::getAllOnesValue(OldBits).zext(NewBits);
796 SDValue SatMax = DAG.getConstant(MaxVal, dl, PromotedType);
797 SDValue Add =
798 DAG.getNode(ISD::ADD, dl, PromotedType, Op1Promoted, Op2Promoted);
799 return DAG.getNode(ISD::UMIN, dl, PromotedType, Add, SatMax);
800 }
801
802 // USUBSAT can always be promoted as long as we have zero-extended the args.
803 if (Opcode == ISD::USUBSAT)
804 return DAG.getNode(ISD::USUBSAT, dl, PromotedType, Op1Promoted,
805 Op2Promoted);
806
807 // Shift cannot use a min/max expansion, we can't detect overflow if all of
808 // the bits have been shifted out.
809 if (IsShift || TLI.isOperationLegalOrCustom(Opcode, PromotedType)) {
810 unsigned ShiftOp;
811 switch (Opcode) {
812 case ISD::SADDSAT:
813 case ISD::SSUBSAT:
814 case ISD::SSHLSAT:
815 ShiftOp = ISD::SRA;
816 break;
817 case ISD::USHLSAT:
818 ShiftOp = ISD::SRL;
819 break;
820 default:
821 llvm_unreachable("Expected opcode to be signed or unsigned saturation "__builtin_unreachable()
822 "addition, subtraction or left shift")__builtin_unreachable();
823 }
824
825 unsigned SHLAmount = NewBits - OldBits;
826 EVT SHVT = TLI.getShiftAmountTy(PromotedType, DAG.getDataLayout());
827 SDValue ShiftAmount = DAG.getConstant(SHLAmount, dl, SHVT);
828 Op1Promoted =
829 DAG.getNode(ISD::SHL, dl, PromotedType, Op1Promoted, ShiftAmount);
830 if (!IsShift)
831 Op2Promoted =
832 DAG.getNode(ISD::SHL, dl, PromotedType, Op2Promoted, ShiftAmount);
833
834 SDValue Result =
835 DAG.getNode(Opcode, dl, PromotedType, Op1Promoted, Op2Promoted);
836 return DAG.getNode(ShiftOp, dl, PromotedType, Result, ShiftAmount);
837 }
838
839 unsigned AddOp = Opcode == ISD::SADDSAT ? ISD::ADD : ISD::SUB;
840 APInt MinVal = APInt::getSignedMinValue(OldBits).sext(NewBits);
841 APInt MaxVal = APInt::getSignedMaxValue(OldBits).sext(NewBits);
842 SDValue SatMin = DAG.getConstant(MinVal, dl, PromotedType);
843 SDValue SatMax = DAG.getConstant(MaxVal, dl, PromotedType);
844 SDValue Result =
845 DAG.getNode(AddOp, dl, PromotedType, Op1Promoted, Op2Promoted);
846 Result = DAG.getNode(ISD::SMIN, dl, PromotedType, Result, SatMax);
847 Result = DAG.getNode(ISD::SMAX, dl, PromotedType, Result, SatMin);
848 return Result;
849}
850
851SDValue DAGTypeLegalizer::PromoteIntRes_MULFIX(SDNode *N) {
852 // Can just promote the operands then continue with operation.
853 SDLoc dl(N);
854 SDValue Op1Promoted, Op2Promoted;
855 bool Signed =
856 N->getOpcode() == ISD::SMULFIX || N->getOpcode() == ISD::SMULFIXSAT;
857 bool Saturating =
858 N->getOpcode() == ISD::SMULFIXSAT || N->getOpcode() == ISD::UMULFIXSAT;
859 if (Signed) {
860 Op1Promoted = SExtPromotedInteger(N->getOperand(0));
861 Op2Promoted = SExtPromotedInteger(N->getOperand(1));
862 } else {
863 Op1Promoted = ZExtPromotedInteger(N->getOperand(0));
864 Op2Promoted = ZExtPromotedInteger(N->getOperand(1));
865 }
866 EVT OldType = N->getOperand(0).getValueType();
867 EVT PromotedType = Op1Promoted.getValueType();
868 unsigned DiffSize =
869 PromotedType.getScalarSizeInBits() - OldType.getScalarSizeInBits();
870
871 if (Saturating) {
872 // Promoting the operand and result values changes the saturation width,
873 // which is extends the values that we clamp to on saturation. This could be
874 // resolved by shifting one of the operands the same amount, which would
875 // also shift the result we compare against, then shifting back.
876 EVT ShiftTy = TLI.getShiftAmountTy(PromotedType, DAG.getDataLayout());
877 Op1Promoted = DAG.getNode(ISD::SHL, dl, PromotedType, Op1Promoted,
878 DAG.getConstant(DiffSize, dl, ShiftTy));
879 SDValue Result = DAG.getNode(N->getOpcode(), dl, PromotedType, Op1Promoted,
880 Op2Promoted, N->getOperand(2));
881 unsigned ShiftOp = Signed ? ISD::SRA : ISD::SRL;
882 return DAG.getNode(ShiftOp, dl, PromotedType, Result,
883 DAG.getConstant(DiffSize, dl, ShiftTy));
884 }
885 return DAG.getNode(N->getOpcode(), dl, PromotedType, Op1Promoted, Op2Promoted,
886 N->getOperand(2));
887}
888
889static SDValue SaturateWidenedDIVFIX(SDValue V, SDLoc &dl,
890 unsigned SatW, bool Signed,
891 const TargetLowering &TLI,
892 SelectionDAG &DAG) {
893 EVT VT = V.getValueType();
894 unsigned VTW = VT.getScalarSizeInBits();
895
896 if (!Signed) {
897 // Saturate to the unsigned maximum by getting the minimum of V and the
898 // maximum.
899 return DAG.getNode(ISD::UMIN, dl, VT, V,
900 DAG.getConstant(APInt::getLowBitsSet(VTW, SatW),
901 dl, VT));
902 }
903
904 // Saturate to the signed maximum (the low SatW - 1 bits) by taking the
905 // signed minimum of it and V.
906 V = DAG.getNode(ISD::SMIN, dl, VT, V,
907 DAG.getConstant(APInt::getLowBitsSet(VTW, SatW - 1),
908 dl, VT));
909 // Saturate to the signed minimum (the high SatW + 1 bits) by taking the
910 // signed maximum of it and V.
911 V = DAG.getNode(ISD::SMAX, dl, VT, V,
912 DAG.getConstant(APInt::getHighBitsSet(VTW, VTW - SatW + 1),
913 dl, VT));
914 return V;
915}
916
917static SDValue earlyExpandDIVFIX(SDNode *N, SDValue LHS, SDValue RHS,
918 unsigned Scale, const TargetLowering &TLI,
919 SelectionDAG &DAG, unsigned SatW = 0) {
920 EVT VT = LHS.getValueType();
921 unsigned VTSize = VT.getScalarSizeInBits();
922 bool Signed = N->getOpcode() == ISD::SDIVFIX ||
923 N->getOpcode() == ISD::SDIVFIXSAT;
924 bool Saturating = N->getOpcode() == ISD::SDIVFIXSAT ||
925 N->getOpcode() == ISD::UDIVFIXSAT;
926
927 SDLoc dl(N);
928 // Widen the types by a factor of two. This is guaranteed to expand, since it
929 // will always have enough high bits in the LHS to shift into.
930 EVT WideVT = EVT::getIntegerVT(*DAG.getContext(), VTSize * 2);
931 if (VT.isVector())
932 WideVT = EVT::getVectorVT(*DAG.getContext(), WideVT,
933 VT.getVectorElementCount());
934 if (Signed) {
935 LHS = DAG.getSExtOrTrunc(LHS, dl, WideVT);
936 RHS = DAG.getSExtOrTrunc(RHS, dl, WideVT);
937 } else {
938 LHS = DAG.getZExtOrTrunc(LHS, dl, WideVT);
939 RHS = DAG.getZExtOrTrunc(RHS, dl, WideVT);
940 }
941
942 SDValue Res = TLI.expandFixedPointDiv(N->getOpcode(), dl, LHS, RHS, Scale,
943 DAG);
944 assert(Res && "Expanding DIVFIX with wide type failed?")((void)0);
945 if (Saturating) {
946 // If the caller has told us to saturate at something less, use that width
947 // instead of the type before doubling. However, it cannot be more than
948 // what we just widened!
949 assert(SatW <= VTSize &&((void)0)
950 "Tried to saturate to more than the original type?")((void)0);
951 Res = SaturateWidenedDIVFIX(Res, dl, SatW == 0 ? VTSize : SatW, Signed,
952 TLI, DAG);
953 }
954 return DAG.getZExtOrTrunc(Res, dl, VT);
955}
956
957SDValue DAGTypeLegalizer::PromoteIntRes_DIVFIX(SDNode *N) {
958 SDLoc dl(N);
959 SDValue Op1Promoted, Op2Promoted;
960 bool Signed = N->getOpcode() == ISD::SDIVFIX ||
961 N->getOpcode() == ISD::SDIVFIXSAT;
962 bool Saturating = N->getOpcode() == ISD::SDIVFIXSAT ||
963 N->getOpcode() == ISD::UDIVFIXSAT;
964 if (Signed) {
965 Op1Promoted = SExtPromotedInteger(N->getOperand(0));
966 Op2Promoted = SExtPromotedInteger(N->getOperand(1));
967 } else {
968 Op1Promoted = ZExtPromotedInteger(N->getOperand(0));
969 Op2Promoted = ZExtPromotedInteger(N->getOperand(1));
970 }
971 EVT PromotedType = Op1Promoted.getValueType();
972 unsigned Scale = N->getConstantOperandVal(2);
973
974 // If the type is already legal and the operation is legal in that type, we
975 // should not early expand.
976 if (TLI.isTypeLegal(PromotedType)) {
977 TargetLowering::LegalizeAction Action =
978 TLI.getFixedPointOperationAction(N->getOpcode(), PromotedType, Scale);
979 if (Action == TargetLowering::Legal || Action == TargetLowering::Custom) {
980 EVT ShiftTy = TLI.getShiftAmountTy(PromotedType, DAG.getDataLayout());
981 unsigned Diff = PromotedType.getScalarSizeInBits() -
982 N->getValueType(0).getScalarSizeInBits();
983 if (Saturating)
984 Op1Promoted = DAG.getNode(ISD::SHL, dl, PromotedType, Op1Promoted,
985 DAG.getConstant(Diff, dl, ShiftTy));
986 SDValue Res = DAG.getNode(N->getOpcode(), dl, PromotedType, Op1Promoted,
987 Op2Promoted, N->getOperand(2));
988 if (Saturating)
989 Res = DAG.getNode(Signed ? ISD::SRA : ISD::SRL, dl, PromotedType, Res,
990 DAG.getConstant(Diff, dl, ShiftTy));
991 return Res;
992 }
993 }
994
995 // See if we can perform the division in this type without expanding.
996 if (SDValue Res = TLI.expandFixedPointDiv(N->getOpcode(), dl, Op1Promoted,
997 Op2Promoted, Scale, DAG)) {
998 if (Saturating)
999 Res = SaturateWidenedDIVFIX(Res, dl,
1000 N->getValueType(0).getScalarSizeInBits(),
1001 Signed, TLI, DAG);
1002 return Res;
1003 }
1004 // If we cannot, expand it to twice the type width. If we are saturating, give
1005 // it the original width as a saturating width so we don't need to emit
1006 // two saturations.
1007 return earlyExpandDIVFIX(N, Op1Promoted, Op2Promoted, Scale, TLI, DAG,
1008 N->getValueType(0).getScalarSizeInBits());
1009}
1010
1011SDValue DAGTypeLegalizer::PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo) {
1012 if (ResNo == 1)
1013 return PromoteIntRes_Overflow(N);
1014
1015 // The operation overflowed iff the result in the larger type is not the
1016 // sign extension of its truncation to the original type.
1017 SDValue LHS = SExtPromotedInteger(N->getOperand(0));
1018 SDValue RHS = SExtPromotedInteger(N->getOperand(1));
1019 EVT OVT = N->getOperand(0).getValueType();
1020 EVT NVT = LHS.getValueType();
1021 SDLoc dl(N);
1022
1023 // Do the arithmetic in the larger type.
1024 unsigned Opcode = N->getOpcode() == ISD::SADDO ? ISD::ADD : ISD::SUB;
1025 SDValue Res = DAG.getNode(Opcode, dl, NVT, LHS, RHS);
1026
1027 // Calculate the overflow flag: sign extend the arithmetic result from
1028 // the original type.
1029 SDValue Ofl = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, NVT, Res,
1030 DAG.getValueType(OVT));
1031 // Overflowed if and only if this is not equal to Res.
1032 Ofl = DAG.getSetCC(dl, N->getValueType(1), Ofl, Res, ISD::SETNE);
1033
1034 // Use the calculated overflow everywhere.
1035 ReplaceValueWith(SDValue(N, 1), Ofl);
1036
1037 return Res;
1038}
1039
1040SDValue DAGTypeLegalizer::PromoteIntRes_SELECT(SDNode *N) {
1041 SDValue LHS = GetPromotedInteger(N->getOperand(1));
1042 SDValue RHS = GetPromotedInteger(N->getOperand(2));
1043 return DAG.getSelect(SDLoc(N),
1044 LHS.getValueType(), N->getOperand(0), LHS, RHS);
1045}
1046
1047SDValue DAGTypeLegalizer::PromoteIntRes_VSELECT(SDNode *N) {
1048 SDValue Mask = N->getOperand(0);
1049
1050 SDValue LHS = GetPromotedInteger(N->getOperand(1));
1051 SDValue RHS = GetPromotedInteger(N->getOperand(2));
1052 return DAG.getNode(ISD::VSELECT, SDLoc(N),
1053 LHS.getValueType(), Mask, LHS, RHS);
1054}
1055
1056SDValue DAGTypeLegalizer::PromoteIntRes_SELECT_CC(SDNode *N) {
1057 SDValue LHS = GetPromotedInteger(N->getOperand(2));
1058 SDValue RHS = GetPromotedInteger(N->getOperand(3));
1059 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
1060 LHS.getValueType(), N->getOperand(0),
1061 N->getOperand(1), LHS, RHS, N->getOperand(4));
1062}
1063
1064SDValue DAGTypeLegalizer::PromoteIntRes_SETCC(SDNode *N) {
1065 unsigned OpNo = N->isStrictFPOpcode() ? 1 : 0;
1066 EVT InVT = N->getOperand(OpNo).getValueType();
1067 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1068
1069 EVT SVT = getSetCCResultType(InVT);
1070
1071 // If we got back a type that needs to be promoted, this likely means the
1072 // the input type also needs to be promoted. So get the promoted type for
1073 // the input and try the query again.
1074 if (getTypeAction(SVT) == TargetLowering::TypePromoteInteger) {
1075 if (getTypeAction(InVT) == TargetLowering::TypePromoteInteger) {
1076 InVT = TLI.getTypeToTransformTo(*DAG.getContext(), InVT);
1077 SVT = getSetCCResultType(InVT);
1078 } else {
1079 // Input type isn't promoted, just use the default promoted type.
1080 SVT = NVT;
1081 }
1082 }
1083
1084 SDLoc dl(N);
1085 assert(SVT.isVector() == N->getOperand(OpNo).getValueType().isVector() &&((void)0)
1086 "Vector compare must return a vector result!")((void)0);
1087
1088 // Get the SETCC result using the canonical SETCC type.
1089 SDValue SetCC;
1090 if (N->isStrictFPOpcode()) {
1091 EVT VTs[] = {SVT, MVT::Other};
1092 SDValue Opers[] = {N->getOperand(0), N->getOperand(1),
1093 N->getOperand(2), N->getOperand(3)};
1094 SetCC = DAG.getNode(N->getOpcode(), dl, VTs, Opers);
1095 // Legalize the chain result - switch anything that used the old chain to
1096 // use the new one.
1097 ReplaceValueWith(SDValue(N, 1), SetCC.getValue(1));
1098 } else
1099 SetCC = DAG.getNode(N->getOpcode(), dl, SVT, N->getOperand(0),
1100 N->getOperand(1), N->getOperand(2));
1101
1102 // Convert to the expected type.
1103 return DAG.getSExtOrTrunc(SetCC, dl, NVT);
1104}
1105
1106SDValue DAGTypeLegalizer::PromoteIntRes_SHL(SDNode *N) {
1107 SDValue LHS = GetPromotedInteger(N->getOperand(0));
1108 SDValue RHS = N->getOperand(1);
1109 if (getTypeAction(RHS.getValueType()) == TargetLowering::TypePromoteInteger)
1110 RHS = ZExtPromotedInteger(RHS);
1111 return DAG.getNode(ISD::SHL, SDLoc(N), LHS.getValueType(), LHS, RHS);
1112}
1113
1114SDValue DAGTypeLegalizer::PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N) {
1115 SDValue Op = GetPromotedInteger(N->getOperand(0));
1116 return DAG.getNode(ISD::SIGN_EXTEND_INREG, SDLoc(N),
1117 Op.getValueType(), Op, N->getOperand(1));
1118}
1119
1120SDValue DAGTypeLegalizer::PromoteIntRes_SimpleIntBinOp(SDNode *N) {
1121 // The input may have strange things in the top bits of the registers, but
1122 // these operations don't care. They may have weird bits going out, but
1123 // that too is okay if they are integer operations.
1124 SDValue LHS = GetPromotedInteger(N->getOperand(0));
1125 SDValue RHS = GetPromotedInteger(N->getOperand(1));
1126 return DAG.getNode(N->getOpcode(), SDLoc(N),
1127 LHS.getValueType(), LHS, RHS);
1128}
1129
1130SDValue DAGTypeLegalizer::PromoteIntRes_SExtIntBinOp(SDNode *N) {
1131 // Sign extend the input.
1132 SDValue LHS = SExtPromotedInteger(N->getOperand(0));
1133 SDValue RHS = SExtPromotedInteger(N->getOperand(1));
1134 return DAG.getNode(N->getOpcode(), SDLoc(N),
1135 LHS.getValueType(), LHS, RHS);
1136}
1137
1138SDValue DAGTypeLegalizer::PromoteIntRes_ZExtIntBinOp(SDNode *N) {
1139 // Zero extend the input.
1140 SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
1141 SDValue RHS = ZExtPromotedInteger(N->getOperand(1));
1142 return DAG.getNode(N->getOpcode(), SDLoc(N),
1143 LHS.getValueType(), LHS, RHS);
1144}
1145
1146SDValue DAGTypeLegalizer::PromoteIntRes_UMINUMAX(SDNode *N) {
1147 // It doesn't matter if we sign extend or zero extend in the inputs. So do
1148 // whatever is best for the target.
1149 SDValue LHS = SExtOrZExtPromotedInteger(N->getOperand(0));
1150 SDValue RHS = SExtOrZExtPromotedInteger(N->getOperand(1));
1151 return DAG.getNode(N->getOpcode(), SDLoc(N),
1152 LHS.getValueType(), LHS, RHS);
1153}
1154
1155SDValue DAGTypeLegalizer::PromoteIntRes_SRA(SDNode *N) {
1156 // The input value must be properly sign extended.
1157 SDValue LHS = SExtPromotedInteger(N->getOperand(0));
1158 SDValue RHS = N->getOperand(1);
1159 if (getTypeAction(RHS.getValueType()) == TargetLowering::TypePromoteInteger)
1160 RHS = ZExtPromotedInteger(RHS);
1161 return DAG.getNode(ISD::SRA, SDLoc(N), LHS.getValueType(), LHS, RHS);
1162}
1163
1164SDValue DAGTypeLegalizer::PromoteIntRes_SRL(SDNode *N) {
1165 // The input value must be properly zero extended.
1166 SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
1167 SDValue RHS = N->getOperand(1);
1168 if (getTypeAction(RHS.getValueType()) == TargetLowering::TypePromoteInteger)
1169 RHS = ZExtPromotedInteger(RHS);
1170 return DAG.getNode(ISD::SRL, SDLoc(N), LHS.getValueType(), LHS, RHS);
1171}
1172
1173SDValue DAGTypeLegalizer::PromoteIntRes_Rotate(SDNode *N) {
1174 // Lower the rotate to shifts and ORs which can be promoted.
1175 SDValue Res;
1176 TLI.expandROT(N, true /*AllowVectorOps*/, Res, DAG);
1177 ReplaceValueWith(SDValue(N, 0), Res);
1178 return SDValue();
1179}
1180
1181SDValue DAGTypeLegalizer::PromoteIntRes_FunnelShift(SDNode *N) {
1182 SDValue Hi = GetPromotedInteger(N->getOperand(0));
1183 SDValue Lo = GetPromotedInteger(N->getOperand(1));
1184 SDValue Amount = GetPromotedInteger(N->getOperand(2));
1185
1186 SDLoc DL(N);
1187 EVT OldVT = N->getOperand(0).getValueType();
1188 EVT VT = Lo.getValueType();
1189 unsigned Opcode = N->getOpcode();
1190 bool IsFSHR = Opcode == ISD::FSHR;
1191 unsigned OldBits = OldVT.getScalarSizeInBits();
1192 unsigned NewBits = VT.getScalarSizeInBits();
1193
1194 // Amount has to be interpreted modulo the old bit width.
1195 Amount =
1196 DAG.getNode(ISD::UREM, DL, VT, Amount, DAG.getConstant(OldBits, DL, VT));
1197
1198 // If the promoted type is twice the size (or more), then we use the
1199 // traditional funnel 'double' shift codegen. This isn't necessary if the
1200 // shift amount is constant.
1201 // fshl(x,y,z) -> (((aext(x) << bw) | zext(y)) << (z % bw)) >> bw.
1202 // fshr(x,y,z) -> (((aext(x) << bw) | zext(y)) >> (z % bw)).
1203 if (NewBits >= (2 * OldBits) && !isa<ConstantSDNode>(Amount) &&
1204 !TLI.isOperationLegalOrCustom(Opcode, VT)) {
1205 SDValue HiShift = DAG.getConstant(OldBits, DL, VT);
1206 Hi = DAG.getNode(ISD::SHL, DL, VT, Hi, HiShift);
1207 Lo = DAG.getZeroExtendInReg(Lo, DL, OldVT);
1208 SDValue Res = DAG.getNode(ISD::OR, DL, VT, Hi, Lo);
1209 Res = DAG.getNode(IsFSHR ? ISD::SRL : ISD::SHL, DL, VT, Res, Amount);
1210 if (!IsFSHR)
1211 Res = DAG.getNode(ISD::SRL, DL, VT, Res, HiShift);
1212 return Res;
1213 }
1214
1215 // Shift Lo up to occupy the upper bits of the promoted type.
1216 SDValue ShiftOffset = DAG.getConstant(NewBits - OldBits, DL, VT);
1217 Lo = DAG.getNode(ISD::SHL, DL, VT, Lo, ShiftOffset);
1218
1219 // Increase Amount to shift the result into the lower bits of the promoted
1220 // type.
1221 if (IsFSHR)
1222 Amount = DAG.getNode(ISD::ADD, DL, VT, Amount, ShiftOffset);
1223
1224 return DAG.getNode(Opcode, DL, VT, Hi, Lo, Amount);
1225}
1226
1227SDValue DAGTypeLegalizer::PromoteIntRes_TRUNCATE(SDNode *N) {
1228 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1229 SDValue Res;
1230 SDValue InOp = N->getOperand(0);
1231 SDLoc dl(N);
1232
1233 switch (getTypeAction(InOp.getValueType())) {
1234 default: llvm_unreachable("Unknown type action!")__builtin_unreachable();
1235 case TargetLowering::TypeLegal:
1236 case TargetLowering::TypeExpandInteger:
1237 Res = InOp;
1238 break;
1239 case TargetLowering::TypePromoteInteger:
1240 Res = GetPromotedInteger(InOp);
1241 break;
1242 case TargetLowering::TypeSplitVector: {
1243 EVT InVT = InOp.getValueType();
1244 assert(InVT.isVector() && "Cannot split scalar types")((void)0);
1245 ElementCount NumElts = InVT.getVectorElementCount();
1246 assert(NumElts == NVT.getVectorElementCount() &&((void)0)
1247 "Dst and Src must have the same number of elements")((void)0);
1248 assert(isPowerOf2_32(NumElts.getKnownMinValue()) &&((void)0)
1249 "Promoted vector type must be a power of two")((void)0);
1250
1251 SDValue EOp1, EOp2;
1252 GetSplitVector(InOp, EOp1, EOp2);
1253
1254 EVT HalfNVT = EVT::getVectorVT(*DAG.getContext(), NVT.getScalarType(),
1255 NumElts.divideCoefficientBy(2));
1256 EOp1 = DAG.getNode(ISD::TRUNCATE, dl, HalfNVT, EOp1);
1257 EOp2 = DAG.getNode(ISD::TRUNCATE, dl, HalfNVT, EOp2);
1258
1259 return DAG.getNode(ISD::CONCAT_VECTORS, dl, NVT, EOp1, EOp2);
1260 }
1261 case TargetLowering::TypeWidenVector: {
1262 SDValue WideInOp = GetWidenedVector(InOp);
1263
1264 // Truncate widened InOp.
1265 unsigned NumElem = WideInOp.getValueType().getVectorNumElements();
1266 EVT TruncVT = EVT::getVectorVT(*DAG.getContext(),
1267 N->getValueType(0).getScalarType(), NumElem);
1268 SDValue WideTrunc = DAG.getNode(ISD::TRUNCATE, dl, TruncVT, WideInOp);
1269
1270 // Zero extend so that the elements are of same type as those of NVT
1271 EVT ExtVT = EVT::getVectorVT(*DAG.getContext(), NVT.getVectorElementType(),
1272 NumElem);
1273 SDValue WideExt = DAG.getNode(ISD::ZERO_EXTEND, dl, ExtVT, WideTrunc);
1274
1275 // Extract the low NVT subvector.
1276 SDValue ZeroIdx = DAG.getVectorIdxConstant(0, dl);
1277 return DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, NVT, WideExt, ZeroIdx);
1278 }
1279 }
1280
1281 // Truncate to NVT instead of VT
1282 return DAG.getNode(ISD::TRUNCATE, dl, NVT, Res);
1283}
1284
1285SDValue DAGTypeLegalizer::PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo) {
1286 if (ResNo == 1)
1287 return PromoteIntRes_Overflow(N);
1288
1289 // The operation overflowed iff the result in the larger type is not the
1290 // zero extension of its truncation to the original type.
1291 SDValue LHS = ZExtPromotedInteger(N->getOperand(0));
1292 SDValue RHS = ZExtPromotedInteger(N->getOperand(1));
1293 EVT OVT = N->getOperand(0).getValueType();
1294 EVT NVT = LHS.getValueType();
1295 SDLoc dl(N);
1296
1297 // Do the arithmetic in the larger type.
1298 unsigned Opcode = N->getOpcode() == ISD::UADDO ? ISD::ADD : ISD::SUB;
1299 SDValue Res = DAG.getNode(Opcode, dl, NVT, LHS, RHS);
1300
1301 // Calculate the overflow flag: zero extend the arithmetic result from
1302 // the original type.
1303 SDValue Ofl = DAG.getZeroExtendInReg(Res, dl, OVT);
1304 // Overflowed if and only if this is not equal to Res.
1305 Ofl = DAG.getSetCC(dl, N->getValueType(1), Ofl, Res, ISD::SETNE);
1306
1307 // Use the calculated overflow everywhere.
1308 ReplaceValueWith(SDValue(N, 1), Ofl);
1309
1310 return Res;
1311}
1312
1313// Handle promotion for the ADDE/SUBE/ADDCARRY/SUBCARRY nodes. Notice that
1314// the third operand of ADDE/SUBE nodes is carry flag, which differs from
1315// the ADDCARRY/SUBCARRY nodes in that the third operand is carry Boolean.
1316SDValue DAGTypeLegalizer::PromoteIntRes_ADDSUBCARRY(SDNode *N, unsigned ResNo) {
1317 if (ResNo == 1)
1318 return PromoteIntRes_Overflow(N);
1319
1320 // We need to sign-extend the operands so the carry value computed by the
1321 // wide operation will be equivalent to the carry value computed by the
1322 // narrow operation.
1323 // An ADDCARRY can generate carry only if any of the operands has its
1324 // most significant bit set. Sign extension propagates the most significant
1325 // bit into the higher bits which means the extra bit that the narrow
1326 // addition would need (i.e. the carry) will be propagated through the higher
1327 // bits of the wide addition.
1328 // A SUBCARRY can generate borrow only if LHS < RHS and this property will be
1329 // preserved by sign extension.
1330 SDValue LHS = SExtPromotedInteger(N->getOperand(0));
1331 SDValue RHS = SExtPromotedInteger(N->getOperand(1));
1332
1333 EVT ValueVTs[] = {LHS.getValueType(), N->getValueType(1)};
1334
1335 // Do the arithmetic in the wide type.
1336 SDValue Res = DAG.getNode(N->getOpcode(), SDLoc(N), DAG.getVTList(ValueVTs),
1337 LHS, RHS, N->getOperand(2));
1338
1339 // Update the users of the original carry/borrow value.
1340 ReplaceValueWith(SDValue(N, 1), Res.getValue(1));
1341
1342 return SDValue(Res.getNode(), 0);
1343}
1344
1345SDValue DAGTypeLegalizer::PromoteIntRes_SADDSUBO_CARRY(SDNode *N,
1346 unsigned ResNo) {
1347 assert(ResNo == 1 && "Don't know how to promote other results yet.")((void)0);
1348 return PromoteIntRes_Overflow(N);
1349}
1350
1351SDValue DAGTypeLegalizer::PromoteIntRes_ABS(SDNode *N) {
1352 SDValue Op0 = SExtPromotedInteger(N->getOperand(0));
1353 return DAG.getNode(ISD::ABS, SDLoc(N), Op0.getValueType(), Op0);
1354}
1355
1356SDValue DAGTypeLegalizer::PromoteIntRes_XMULO(SDNode *N, unsigned ResNo) {
1357 // Promote the overflow bit trivially.
1358 if (ResNo == 1)
1359 return PromoteIntRes_Overflow(N);
1360
1361 SDValue LHS = N->getOperand(0), RHS = N->getOperand(1);
1362 SDLoc DL(N);
1363 EVT SmallVT = LHS.getValueType();
1364
1365 // To determine if the result overflowed in a larger type, we extend the
1366 // input to the larger type, do the multiply (checking if it overflows),
1367 // then also check the high bits of the result to see if overflow happened
1368 // there.
1369 if (N->getOpcode() == ISD::SMULO) {
1370 LHS = SExtPromotedInteger(LHS);
1371 RHS = SExtPromotedInteger(RHS);
1372 } else {
1373 LHS = ZExtPromotedInteger(LHS);
1374 RHS = ZExtPromotedInteger(RHS);
1375 }
1376 SDVTList VTs = DAG.getVTList(LHS.getValueType(), N->getValueType(1));
1377 SDValue Mul = DAG.getNode(N->getOpcode(), DL, VTs, LHS, RHS);
1378
1379 // Overflow occurred if it occurred in the larger type, or if the high part
1380 // of the result does not zero/sign-extend the low part. Check this second
1381 // possibility first.
1382 SDValue Overflow;
1383 if (N->getOpcode() == ISD::UMULO) {
1384 // Unsigned overflow occurred if the high part is non-zero.
1385 unsigned Shift = SmallVT.getScalarSizeInBits();
1386 EVT ShiftTy = getShiftAmountTyForConstant(Mul.getValueType(), TLI, DAG);
1387 SDValue Hi = DAG.getNode(ISD::SRL, DL, Mul.getValueType(), Mul,
1388 DAG.getConstant(Shift, DL, ShiftTy));
1389 Overflow = DAG.getSetCC(DL, N->getValueType(1), Hi,
1390 DAG.getConstant(0, DL, Hi.getValueType()),
1391 ISD::SETNE);
1392 } else {
1393 // Signed overflow occurred if the high part does not sign extend the low.
1394 SDValue SExt = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, Mul.getValueType(),
1395 Mul, DAG.getValueType(SmallVT));
1396 Overflow = DAG.getSetCC(DL, N->getValueType(1), SExt, Mul, ISD::SETNE);
1397 }
1398
1399 // The only other way for overflow to occur is if the multiplication in the
1400 // larger type itself overflowed.
1401 Overflow = DAG.getNode(ISD::OR, DL, N->getValueType(1), Overflow,
1402 SDValue(Mul.getNode(), 1));
1403
1404 // Use the calculated overflow everywhere.
1405 ReplaceValueWith(SDValue(N, 1), Overflow);
1406 return Mul;
1407}
1408
1409SDValue DAGTypeLegalizer::PromoteIntRes_UNDEF(SDNode *N) {
1410 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
1411 N->getValueType(0)));
1412}
1413
1414SDValue DAGTypeLegalizer::PromoteIntRes_VSCALE(SDNode *N) {
1415 EVT VT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1416
1417 APInt MulImm = cast<ConstantSDNode>(N->getOperand(0))->getAPIntValue();
1418 return DAG.getVScale(SDLoc(N), VT, MulImm.sextOrSelf(VT.getSizeInBits()));
1419}
1420
1421SDValue DAGTypeLegalizer::PromoteIntRes_VAARG(SDNode *N) {
1422 SDValue Chain = N->getOperand(0); // Get the chain.
1423 SDValue Ptr = N->getOperand(1); // Get the pointer.
1424 EVT VT = N->getValueType(0);
1425 SDLoc dl(N);
1426
1427 MVT RegVT = TLI.getRegisterType(*DAG.getContext(), VT);
1428 unsigned NumRegs = TLI.getNumRegisters(*DAG.getContext(), VT);
1429 // The argument is passed as NumRegs registers of type RegVT.
1430
1431 SmallVector<SDValue, 8> Parts(NumRegs);
1432 for (unsigned i = 0; i < NumRegs; ++i) {
1433 Parts[i] = DAG.getVAArg(RegVT, dl, Chain, Ptr, N->getOperand(2),
1434 N->getConstantOperandVal(3));
1435 Chain = Parts[i].getValue(1);
1436 }
1437
1438 // Handle endianness of the load.
1439 if (DAG.getDataLayout().isBigEndian())
1440 std::reverse(Parts.begin(), Parts.end());
1441
1442 // Assemble the parts in the promoted type.
1443 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1444 SDValue Res = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Parts[0]);
1445 for (unsigned i = 1; i < NumRegs; ++i) {
1446 SDValue Part = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Parts[i]);
1447 // Shift it to the right position and "or" it in.
1448 Part = DAG.getNode(ISD::SHL, dl, NVT, Part,
1449 DAG.getConstant(i * RegVT.getSizeInBits(), dl,
1450 TLI.getPointerTy(DAG.getDataLayout())));
1451 Res = DAG.getNode(ISD::OR, dl, NVT, Res, Part);
1452 }
1453
1454 // Modified the chain result - switch anything that used the old chain to
1455 // use the new one.
1456 ReplaceValueWith(SDValue(N, 1), Chain);
1457
1458 return Res;
1459}
1460
1461//===----------------------------------------------------------------------===//
1462// Integer Operand Promotion
1463//===----------------------------------------------------------------------===//
1464
1465/// PromoteIntegerOperand - This method is called when the specified operand of
1466/// the specified node is found to need promotion. At this point, all of the
1467/// result types of the node are known to be legal, but other operands of the
1468/// node may need promotion or expansion as well as the specified one.
1469bool DAGTypeLegalizer::PromoteIntegerOperand(SDNode *N, unsigned OpNo) {
1470 LLVM_DEBUG(dbgs() << "Promote integer operand: "; N->dump(&DAG);do { } while (false)
1471 dbgs() << "\n")do { } while (false);
1472 SDValue Res = SDValue();
1473 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false)) {
1474 LLVM_DEBUG(dbgs() << "Node has been custom lowered, done\n")do { } while (false);
1475 return false;
1476 }
1477
1478 switch (N->getOpcode()) {
1479 default:
1480 #ifndef NDEBUG1
1481 dbgs() << "PromoteIntegerOperand Op #" << OpNo << ": ";
1482 N->dump(&DAG); dbgs() << "\n";
1483 #endif
1484 llvm_unreachable("Do not know how to promote this operator's operand!")__builtin_unreachable();
1485
1486 case ISD::ANY_EXTEND: Res = PromoteIntOp_ANY_EXTEND(N); break;
1487 case ISD::ATOMIC_STORE:
1488 Res = PromoteIntOp_ATOMIC_STORE(cast<AtomicSDNode>(N));
1489 break;
1490 case ISD::BITCAST: Res = PromoteIntOp_BITCAST(N); break;
1491 case ISD::BR_CC: Res = PromoteIntOp_BR_CC(N, OpNo); break;
1492 case ISD::BRCOND: Res = PromoteIntOp_BRCOND(N, OpNo); break;
1493 case ISD::BUILD_PAIR: Res = PromoteIntOp_BUILD_PAIR(N); break;
1494 case ISD::BUILD_VECTOR: Res = PromoteIntOp_BUILD_VECTOR(N); break;
1495 case ISD::CONCAT_VECTORS: Res = PromoteIntOp_CONCAT_VECTORS(N); break;
1496 case ISD::EXTRACT_VECTOR_ELT: Res = PromoteIntOp_EXTRACT_VECTOR_ELT(N); break;
1497 case ISD::INSERT_VECTOR_ELT:
1498 Res = PromoteIntOp_INSERT_VECTOR_ELT(N, OpNo);break;
1499 case ISD::SCALAR_TO_VECTOR:
1500 Res = PromoteIntOp_SCALAR_TO_VECTOR(N); break;
1501 case ISD::SPLAT_VECTOR:
1502 Res = PromoteIntOp_SPLAT_VECTOR(N); break;
1503 case ISD::VSELECT:
1504 case ISD::SELECT: Res = PromoteIntOp_SELECT(N, OpNo); break;
1505 case ISD::SELECT_CC: Res = PromoteIntOp_SELECT_CC(N, OpNo); break;
1506 case ISD::SETCC: Res = PromoteIntOp_SETCC(N, OpNo); break;
1507 case ISD::SIGN_EXTEND: Res = PromoteIntOp_SIGN_EXTEND(N); break;
1508 case ISD::SINT_TO_FP: Res = PromoteIntOp_SINT_TO_FP(N); break;
1509 case ISD::STRICT_SINT_TO_FP: Res = PromoteIntOp_STRICT_SINT_TO_FP(N); break;
1510 case ISD::STORE: Res = PromoteIntOp_STORE(cast<StoreSDNode>(N),
1511 OpNo); break;
1512 case ISD::MSTORE: Res = PromoteIntOp_MSTORE(cast<MaskedStoreSDNode>(N),
1513 OpNo); break;
1514 case ISD::MLOAD: Res = PromoteIntOp_MLOAD(cast<MaskedLoadSDNode>(N),
1515 OpNo); break;
1516 case ISD::MGATHER: Res = PromoteIntOp_MGATHER(cast<MaskedGatherSDNode>(N),
1517 OpNo); break;
1518 case ISD::MSCATTER: Res = PromoteIntOp_MSCATTER(cast<MaskedScatterSDNode>(N),
1519 OpNo); break;
1520 case ISD::TRUNCATE: Res = PromoteIntOp_TRUNCATE(N); break;
1521 case ISD::FP16_TO_FP:
1522 case ISD::UINT_TO_FP: Res = PromoteIntOp_UINT_TO_FP(N); break;
1523 case ISD::STRICT_UINT_TO_FP: Res = PromoteIntOp_STRICT_UINT_TO_FP(N); break;
1524 case ISD::ZERO_EXTEND: Res = PromoteIntOp_ZERO_EXTEND(N); break;
1525 case ISD::EXTRACT_SUBVECTOR: Res = PromoteIntOp_EXTRACT_SUBVECTOR(N); break;
1526
1527 case ISD::SHL:
1528 case ISD::SRA:
1529 case ISD::SRL:
1530 case ISD::ROTL:
1531 case ISD::ROTR: Res = PromoteIntOp_Shift(N); break;
1532
1533 case ISD::SADDO_CARRY:
1534 case ISD::SSUBO_CARRY:
1535 case ISD::ADDCARRY:
1536 case ISD::SUBCARRY: Res = PromoteIntOp_ADDSUBCARRY(N, OpNo); break;
1537
1538 case ISD::FRAMEADDR:
1539 case ISD::RETURNADDR: Res = PromoteIntOp_FRAMERETURNADDR(N); break;
1540
1541 case ISD::PREFETCH: Res = PromoteIntOp_PREFETCH(N, OpNo); break;
1542
1543 case ISD::SMULFIX:
1544 case ISD::SMULFIXSAT:
1545 case ISD::UMULFIX:
1546 case ISD::UMULFIXSAT:
1547 case ISD::SDIVFIX:
1548 case ISD::SDIVFIXSAT:
1549 case ISD::UDIVFIX:
1550 case ISD::UDIVFIXSAT: Res = PromoteIntOp_FIX(N); break;
1551
1552 case ISD::FPOWI: Res = PromoteIntOp_FPOWI(N); break;
1553
1554 case ISD::VECREDUCE_ADD:
1555 case ISD::VECREDUCE_MUL:
1556 case ISD::VECREDUCE_AND:
1557 case ISD::VECREDUCE_OR:
1558 case ISD::VECREDUCE_XOR:
1559 case ISD::VECREDUCE_SMAX:
1560 case ISD::VECREDUCE_SMIN:
1561 case ISD::VECREDUCE_UMAX:
1562 case ISD::VECREDUCE_UMIN: Res = PromoteIntOp_VECREDUCE(N); break;
1563
1564 case ISD::SET_ROUNDING: Res = PromoteIntOp_SET_ROUNDING(N); break;
1565 }
1566
1567 // If the result is null, the sub-method took care of registering results etc.
1568 if (!Res.getNode()) return false;
1569
1570 // If the result is N, the sub-method updated N in place. Tell the legalizer
1571 // core about this.
1572 if (Res.getNode() == N)
1573 return true;
1574
1575 const bool IsStrictFp = N->isStrictFPOpcode();
1576 assert(Res.getValueType() == N->getValueType(0) &&((void)0)
1577 N->getNumValues() == (IsStrictFp ? 2 : 1) &&((void)0)
1578 "Invalid operand expansion")((void)0);
1579 LLVM_DEBUG(dbgs() << "Replacing: "; N->dump(&DAG); dbgs() << " with: ";do { } while (false)
1580 Res.dump())do { } while (false);
1581
1582 ReplaceValueWith(SDValue(N, 0), Res);
1583 if (IsStrictFp)
1584 ReplaceValueWith(SDValue(N, 1), SDValue(Res.getNode(), 1));
1585
1586 return false;
1587}
1588
1589/// PromoteSetCCOperands - Promote the operands of a comparison. This code is
1590/// shared among BR_CC, SELECT_CC, and SETCC handlers.
1591void DAGTypeLegalizer::PromoteSetCCOperands(SDValue &NewLHS,SDValue &NewRHS,
1592 ISD::CondCode CCCode) {
1593 // We have to insert explicit sign or zero extends. Note that we could
1594 // insert sign extends for ALL conditions. For those operations where either
1595 // zero or sign extension would be valid, use SExtOrZExtPromotedInteger
1596 // which will choose the cheapest for the target.
1597 switch (CCCode) {
1598 default: llvm_unreachable("Unknown integer comparison!")__builtin_unreachable();
1599 case ISD::SETEQ:
1600 case ISD::SETNE: {
1601 SDValue OpL = GetPromotedInteger(NewLHS);
1602 SDValue OpR = GetPromotedInteger(NewRHS);
1603
1604 // We would prefer to promote the comparison operand with sign extension.
1605 // If the width of OpL/OpR excluding the duplicated sign bits is no greater
1606 // than the width of NewLHS/NewRH, we can avoid inserting real truncate
1607 // instruction, which is redundant eventually.
1608 unsigned OpLEffectiveBits =
1609 OpL.getScalarValueSizeInBits() - DAG.ComputeNumSignBits(OpL) + 1;
1610 unsigned OpREffectiveBits =
1611 OpR.getScalarValueSizeInBits() - DAG.ComputeNumSignBits(OpR) + 1;
1612 if (OpLEffectiveBits <= NewLHS.getScalarValueSizeInBits() &&
1613 OpREffectiveBits <= NewRHS.getScalarValueSizeInBits()) {
1614 NewLHS = OpL;
1615 NewRHS = OpR;
1616 } else {
1617 NewLHS = SExtOrZExtPromotedInteger(NewLHS);
1618 NewRHS = SExtOrZExtPromotedInteger(NewRHS);
1619 }
1620 break;
1621 }
1622 case ISD::SETUGE:
1623 case ISD::SETUGT:
1624 case ISD::SETULE:
1625 case ISD::SETULT:
1626 NewLHS = SExtOrZExtPromotedInteger(NewLHS);
1627 NewRHS = SExtOrZExtPromotedInteger(NewRHS);
1628 break;
1629 case ISD::SETGE:
1630 case ISD::SETGT:
1631 case ISD::SETLT:
1632 case ISD::SETLE:
1633 NewLHS = SExtPromotedInteger(NewLHS);
1634 NewRHS = SExtPromotedInteger(NewRHS);
1635 break;
1636 }
1637}
1638
1639SDValue DAGTypeLegalizer::PromoteIntOp_ANY_EXTEND(SDNode *N) {
1640 SDValue Op = GetPromotedInteger(N->getOperand(0));
1641 return DAG.getNode(ISD::ANY_EXTEND, SDLoc(N), N->getValueType(0), Op);
1642}
1643
1644SDValue DAGTypeLegalizer::PromoteIntOp_ATOMIC_STORE(AtomicSDNode *N) {
1645 SDValue Op2 = GetPromotedInteger(N->getOperand(2));
1646 return DAG.getAtomic(N->getOpcode(), SDLoc(N), N->getMemoryVT(),
1647 N->getChain(), N->getBasePtr(), Op2, N->getMemOperand());
1648}
1649
1650SDValue DAGTypeLegalizer::PromoteIntOp_BITCAST(SDNode *N) {
1651 // This should only occur in unusual situations like bitcasting to an
1652 // x86_fp80, so just turn it into a store+load
1653 return CreateStackStoreLoad(N->getOperand(0), N->getValueType(0));
1654}
1655
1656SDValue DAGTypeLegalizer::PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo) {
1657 assert(OpNo == 2 && "Don't know how to promote this operand!")((void)0);
1658
1659 SDValue LHS = N->getOperand(2);
1660 SDValue RHS = N->getOperand(3);
1661 PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(1))->get());
1662
1663 // The chain (Op#0), CC (#1) and basic block destination (Op#4) are always
1664 // legal types.
1665 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1666 N->getOperand(1), LHS, RHS, N->getOperand(4)),
1667 0);
1668}
1669
1670SDValue DAGTypeLegalizer::PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo) {
1671 assert(OpNo == 1 && "only know how to promote condition")((void)0);
1672
1673 // Promote all the way up to the canonical SetCC type.
1674 SDValue Cond = PromoteTargetBoolean(N->getOperand(1), MVT::Other);
1675
1676 // The chain (Op#0) and basic block destination (Op#2) are always legal types.
1677 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0), Cond,
1678 N->getOperand(2)), 0);
1679}
1680
1681SDValue DAGTypeLegalizer::PromoteIntOp_BUILD_PAIR(SDNode *N) {
1682 // Since the result type is legal, the operands must promote to it.
1683 EVT OVT = N->getOperand(0).getValueType();
1684 SDValue Lo = ZExtPromotedInteger(N->getOperand(0));
1685 SDValue Hi = GetPromotedInteger(N->getOperand(1));
1686 assert(Lo.getValueType() == N->getValueType(0) && "Operand over promoted?")((void)0);
1687 SDLoc dl(N);
1688
1689 Hi = DAG.getNode(ISD::SHL, dl, N->getValueType(0), Hi,
1690 DAG.getConstant(OVT.getSizeInBits(), dl,
1691 TLI.getPointerTy(DAG.getDataLayout())));
1692 return DAG.getNode(ISD::OR, dl, N->getValueType(0), Lo, Hi);
1693}
1694
1695SDValue DAGTypeLegalizer::PromoteIntOp_BUILD_VECTOR(SDNode *N) {
1696 // The vector type is legal but the element type is not. This implies
1697 // that the vector is a power-of-two in length and that the element
1698 // type does not have a strange size (eg: it is not i1).
1699 EVT VecVT = N->getValueType(0);
1700 unsigned NumElts = VecVT.getVectorNumElements();
1701 assert(!((NumElts & 1) && (!TLI.isTypeLegal(VecVT))) &&((void)0)
1702 "Legal vector of one illegal element?")((void)0);
1703
1704 // Promote the inserted value. The type does not need to match the
1705 // vector element type. Check that any extra bits introduced will be
1706 // truncated away.
1707 assert(N->getOperand(0).getValueSizeInBits() >=((void)0)
1708 N->getValueType(0).getScalarSizeInBits() &&((void)0)
1709 "Type of inserted value narrower than vector element type!")((void)0);
1710
1711 SmallVector<SDValue, 16> NewOps;
1712 for (unsigned i = 0; i < NumElts; ++i)
1713 NewOps.push_back(GetPromotedInteger(N->getOperand(i)));
1714
1715 return SDValue(DAG.UpdateNodeOperands(N, NewOps), 0);
1716}
1717
1718SDValue DAGTypeLegalizer::PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N,
1719 unsigned OpNo) {
1720 if (OpNo == 1) {
1721 // Promote the inserted value. This is valid because the type does not
1722 // have to match the vector element type.
1723
1724 // Check that any extra bits introduced will be truncated away.
1725 assert(N->getOperand(1).getValueSizeInBits() >=((void)0)
1726 N->getValueType(0).getScalarSizeInBits() &&((void)0)
1727 "Type of inserted value narrower than vector element type!")((void)0);
1728 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1729 GetPromotedInteger(N->getOperand(1)),
1730 N->getOperand(2)),
1731 0);
1732 }
1733
1734 assert(OpNo == 2 && "Different operand and result vector types?")((void)0);
1735
1736 // Promote the index.
1737 SDValue Idx = DAG.getZExtOrTrunc(N->getOperand(2), SDLoc(N),
1738 TLI.getVectorIdxTy(DAG.getDataLayout()));
1739 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1740 N->getOperand(1), Idx), 0);
1741}
1742
1743SDValue DAGTypeLegalizer::PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N) {
1744 // Integer SCALAR_TO_VECTOR operands are implicitly truncated, so just promote
1745 // the operand in place.
1746 return SDValue(DAG.UpdateNodeOperands(N,
1747 GetPromotedInteger(N->getOperand(0))), 0);
1748}
1749
1750SDValue DAGTypeLegalizer::PromoteIntOp_SPLAT_VECTOR(SDNode *N) {
1751 // Integer SPLAT_VECTOR operands are implicitly truncated, so just promote the
1752 // operand in place.
1753 return SDValue(
1754 DAG.UpdateNodeOperands(N, GetPromotedInteger(N->getOperand(0))), 0);
1755}
1756
1757SDValue DAGTypeLegalizer::PromoteIntOp_SELECT(SDNode *N, unsigned OpNo) {
1758 assert(OpNo == 0 && "Only know how to promote the condition!")((void)0);
1759 SDValue Cond = N->getOperand(0);
1760 EVT OpTy = N->getOperand(1).getValueType();
1761
1762 if (N->getOpcode() == ISD::VSELECT)
1763 if (SDValue Res = WidenVSELECTMask(N))
1764 return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0),
1765 Res, N->getOperand(1), N->getOperand(2));
1766
1767 // Promote all the way up to the canonical SetCC type.
1768 EVT OpVT = N->getOpcode() == ISD::SELECT ? OpTy.getScalarType() : OpTy;
1769 Cond = PromoteTargetBoolean(Cond, OpVT);
1770
1771 return SDValue(DAG.UpdateNodeOperands(N, Cond, N->getOperand(1),
1772 N->getOperand(2)), 0);
1773}
1774
1775SDValue DAGTypeLegalizer::PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo) {
1776 assert(OpNo == 0 && "Don't know how to promote this operand!")((void)0);
1777
1778 SDValue LHS = N->getOperand(0);
1779 SDValue RHS = N->getOperand(1);
1780 PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(4))->get());
1781
1782 // The CC (#4) and the possible return values (#2 and #3) have legal types.
1783 return SDValue(DAG.UpdateNodeOperands(N, LHS, RHS, N->getOperand(2),
1784 N->getOperand(3), N->getOperand(4)), 0);
1785}
1786
1787SDValue DAGTypeLegalizer::PromoteIntOp_SETCC(SDNode *N, unsigned OpNo) {
1788 assert(OpNo == 0 && "Don't know how to promote this operand!")((void)0);
1789
1790 SDValue LHS = N->getOperand(0);
1791 SDValue RHS = N->getOperand(1);
1792 PromoteSetCCOperands(LHS, RHS, cast<CondCodeSDNode>(N->getOperand(2))->get());
1793
1794 // The CC (#2) is always legal.
1795 return SDValue(DAG.UpdateNodeOperands(N, LHS, RHS, N->getOperand(2)), 0);
1796}
1797
1798SDValue DAGTypeLegalizer::PromoteIntOp_Shift(SDNode *N) {
1799 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1800 ZExtPromotedInteger(N->getOperand(1))), 0);
1801}
1802
1803SDValue DAGTypeLegalizer::PromoteIntOp_SIGN_EXTEND(SDNode *N) {
1804 SDValue Op = GetPromotedInteger(N->getOperand(0));
1805 SDLoc dl(N);
1806 Op = DAG.getNode(ISD::ANY_EXTEND, dl, N->getValueType(0), Op);
1807 return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(),
1808 Op, DAG.getValueType(N->getOperand(0).getValueType()));
1809}
1810
1811SDValue DAGTypeLegalizer::PromoteIntOp_SINT_TO_FP(SDNode *N) {
1812 return SDValue(DAG.UpdateNodeOperands(N,
1813 SExtPromotedInteger(N->getOperand(0))), 0);
1814}
1815
1816SDValue DAGTypeLegalizer::PromoteIntOp_STRICT_SINT_TO_FP(SDNode *N) {
1817 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1818 SExtPromotedInteger(N->getOperand(1))), 0);
1819}
1820
1821SDValue DAGTypeLegalizer::PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo){
1822 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!")((void)0);
1823 SDValue Ch = N->getChain(), Ptr = N->getBasePtr();
1824 SDLoc dl(N);
1825
1826 SDValue Val = GetPromotedInteger(N->getValue()); // Get promoted value.
1827
1828 // Truncate the value and store the result.
1829 return DAG.getTruncStore(Ch, dl, Val, Ptr,
1830 N->getMemoryVT(), N->getMemOperand());
1831}
1832
1833SDValue DAGTypeLegalizer::PromoteIntOp_MSTORE(MaskedStoreSDNode *N,
1834 unsigned OpNo) {
1835
1836 SDValue DataOp = N->getValue();
1837 EVT DataVT = DataOp.getValueType();
1838 SDValue Mask = N->getMask();
1839 SDLoc dl(N);
1840
1841 bool TruncateStore = false;
1842 if (OpNo == 4) {
1843 Mask = PromoteTargetBoolean(Mask, DataVT);
1844 // Update in place.
1845 SmallVector<SDValue, 4> NewOps(N->op_begin(), N->op_end());
1846 NewOps[4] = Mask;
1847 return SDValue(DAG.UpdateNodeOperands(N, NewOps), 0);
1848 } else { // Data operand
1849 assert(OpNo == 1 && "Unexpected operand for promotion")((void)0);
1850 DataOp = GetPromotedInteger(DataOp);
1851 TruncateStore = true;
1852 }
1853
1854 return DAG.getMaskedStore(N->getChain(), dl, DataOp, N->getBasePtr(),
1855 N->getOffset(), Mask, N->getMemoryVT(),
1856 N->getMemOperand(), N->getAddressingMode(),
1857 TruncateStore, N->isCompressingStore());
1858}
1859
1860SDValue DAGTypeLegalizer::PromoteIntOp_MLOAD(MaskedLoadSDNode *N,
1861 unsigned OpNo) {
1862 assert(OpNo == 3 && "Only know how to promote the mask!")((void)0);
1863 EVT DataVT = N->getValueType(0);
1864 SDValue Mask = PromoteTargetBoolean(N->getOperand(OpNo), DataVT);
1865 SmallVector<SDValue, 4> NewOps(N->op_begin(), N->op_end());
1866 NewOps[OpNo] = Mask;
1867 SDNode *Res = DAG.UpdateNodeOperands(N, NewOps);
1868 if (Res == N)
1869 return SDValue(Res, 0);
1870
1871 // Update triggered CSE, do our own replacement since caller can't.
1872 ReplaceValueWith(SDValue(N, 0), SDValue(Res, 0));
1873 ReplaceValueWith(SDValue(N, 1), SDValue(Res, 1));
1874 return SDValue();
1875}
1876
1877SDValue DAGTypeLegalizer::PromoteIntOp_MGATHER(MaskedGatherSDNode *N,
1878 unsigned OpNo) {
1879
1880 SmallVector<SDValue, 5> NewOps(N->op_begin(), N->op_end());
1881 if (OpNo == 2) {
1882 // The Mask
1883 EVT DataVT = N->getValueType(0);
1884 NewOps[OpNo] = PromoteTargetBoolean(N->getOperand(OpNo), DataVT);
1885 } else if (OpNo == 4) {
1886 // The Index
1887 if (N->isIndexSigned())
1888 // Need to sign extend the index since the bits will likely be used.
1889 NewOps[OpNo] = SExtPromotedInteger(N->getOperand(OpNo));
1890 else
1891 NewOps[OpNo] = ZExtPromotedInteger(N->getOperand(OpNo));
1892 } else
1893 NewOps[OpNo] = GetPromotedInteger(N->getOperand(OpNo));
1894
1895 SDNode *Res = DAG.UpdateNodeOperands(N, NewOps);
1896 if (Res == N)
1897 return SDValue(Res, 0);
1898
1899 // Update triggered CSE, do our own replacement since caller can't.
1900 ReplaceValueWith(SDValue(N, 0), SDValue(Res, 0));
1901 ReplaceValueWith(SDValue(N, 1), SDValue(Res, 1));
1902 return SDValue();
1903}
1904
1905SDValue DAGTypeLegalizer::PromoteIntOp_MSCATTER(MaskedScatterSDNode *N,
1906 unsigned OpNo) {
1907 bool TruncateStore = N->isTruncatingStore();
1908 SmallVector<SDValue, 5> NewOps(N->op_begin(), N->op_end());
1909 if (OpNo == 2) {
1910 // The Mask
1911 EVT DataVT = N->getValue().getValueType();
1912 NewOps[OpNo] = PromoteTargetBoolean(N->getOperand(OpNo), DataVT);
1913 } else if (OpNo == 4) {
1914 // The Index
1915 if (N->isIndexSigned())
1916 // Need to sign extend the index since the bits will likely be used.
1917 NewOps[OpNo] = SExtPromotedInteger(N->getOperand(OpNo));
1918 else
1919 NewOps[OpNo] = ZExtPromotedInteger(N->getOperand(OpNo));
1920
1921 N->setIndexType(TLI.getCanonicalIndexType(N->getIndexType(),
1922 N->getMemoryVT(), NewOps[OpNo]));
1923 } else {
1924 NewOps[OpNo] = GetPromotedInteger(N->getOperand(OpNo));
1925 TruncateStore = true;
1926 }
1927
1928 return DAG.getMaskedScatter(DAG.getVTList(MVT::Other), N->getMemoryVT(),
1929 SDLoc(N), NewOps, N->getMemOperand(),
1930 N->getIndexType(), TruncateStore);
1931}
1932
1933SDValue DAGTypeLegalizer::PromoteIntOp_TRUNCATE(SDNode *N) {
1934 SDValue Op = GetPromotedInteger(N->getOperand(0));
1935 return DAG.getNode(ISD::TRUNCATE, SDLoc(N), N->getValueType(0), Op);
1936}
1937
1938SDValue DAGTypeLegalizer::PromoteIntOp_UINT_TO_FP(SDNode *N) {
1939 return SDValue(DAG.UpdateNodeOperands(N,
1940 ZExtPromotedInteger(N->getOperand(0))), 0);
1941}
1942
1943SDValue DAGTypeLegalizer::PromoteIntOp_STRICT_UINT_TO_FP(SDNode *N) {
1944 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1945 ZExtPromotedInteger(N->getOperand(1))), 0);
1946}
1947
1948SDValue DAGTypeLegalizer::PromoteIntOp_ZERO_EXTEND(SDNode *N) {
1949 SDLoc dl(N);
1950 SDValue Op = GetPromotedInteger(N->getOperand(0));
1951 Op = DAG.getNode(ISD::ANY_EXTEND, dl, N->getValueType(0), Op);
1952 return DAG.getZeroExtendInReg(Op, dl, N->getOperand(0).getValueType());
1953}
1954
1955SDValue DAGTypeLegalizer::PromoteIntOp_ADDSUBCARRY(SDNode *N, unsigned OpNo) {
1956 assert(OpNo == 2 && "Don't know how to promote this operand!")((void)0);
1957
1958 SDValue LHS = N->getOperand(0);
1959 SDValue RHS = N->getOperand(1);
1960 SDValue Carry = N->getOperand(2);
1961 SDLoc DL(N);
1962
1963 Carry = PromoteTargetBoolean(Carry, LHS.getValueType());
1964
1965 return SDValue(DAG.UpdateNodeOperands(N, LHS, RHS, Carry), 0);
1966}
1967
1968SDValue DAGTypeLegalizer::PromoteIntOp_FIX(SDNode *N) {
1969 SDValue Op2 = ZExtPromotedInteger(N->getOperand(2));
1970 return SDValue(
1971 DAG.UpdateNodeOperands(N, N->getOperand(0), N->getOperand(1), Op2), 0);
1972}
1973
1974SDValue DAGTypeLegalizer::PromoteIntOp_FRAMERETURNADDR(SDNode *N) {
1975 // Promote the RETURNADDR/FRAMEADDR argument to a supported integer width.
1976 SDValue Op = ZExtPromotedInteger(N->getOperand(0));
1977 return SDValue(DAG.UpdateNodeOperands(N, Op), 0);
1978}
1979
1980SDValue DAGTypeLegalizer::PromoteIntOp_PREFETCH(SDNode *N, unsigned OpNo) {
1981 assert(OpNo > 1 && "Don't know how to promote this operand!")((void)0);
1982 // Promote the rw, locality, and cache type arguments to a supported integer
1983 // width.
1984 SDValue Op2 = ZExtPromotedInteger(N->getOperand(2));
1985 SDValue Op3 = ZExtPromotedInteger(N->getOperand(3));
1986 SDValue Op4 = ZExtPromotedInteger(N->getOperand(4));
1987 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0), N->getOperand(1),
1988 Op2, Op3, Op4),
1989 0);
1990}
1991
1992SDValue DAGTypeLegalizer::PromoteIntOp_FPOWI(SDNode *N) {
1993 // FIXME: Support for promotion of STRICT_FPOWI is not implemented yet.
1994 assert(N->getOpcode() == ISD::FPOWI && "No STRICT_FPOWI support here yet.")((void)0);
1995
1996 // The integer operand is the last operand in FPOWI (so the result and
1997 // floating point operand is already type legalized).
1998
1999 // We can't just promote the exponent type in FPOWI, since we want to lower
2000 // the node to a libcall and we if we promote to a type larger than
2001 // sizeof(int) the libcall might not be according to the targets ABI. Instead
2002 // we rewrite to a libcall here directly, letting makeLibCall handle promotion
2003 // if the target accepts it according to shouldSignExtendTypeInLibCall.
2004 RTLIB::Libcall LC = RTLIB::getPOWI(N->getValueType(0));
2005 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fpowi.")((void)0);
2006 if (!TLI.getLibcallName(LC)) {
2007 // Some targets don't have a powi libcall; use pow instead.
2008 // FIXME: Implement this if some target needs it.
2009 DAG.getContext()->emitError("Don't know how to promote fpowi to fpow");
2010 return DAG.getUNDEF(N->getValueType(0));
2011 }
2012 // The exponent should fit in a sizeof(int) type for the libcall to be valid.
2013 assert(DAG.getLibInfo().getIntSize() ==((void)0)
2014 N->getOperand(1).getValueType().getSizeInBits() &&((void)0)
2015 "POWI exponent should match with sizeof(int) when doing the libcall.")((void)0);
2016 TargetLowering::MakeLibCallOptions CallOptions;
2017 CallOptions.setSExt(true);
2018 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
2019 std::pair<SDValue, SDValue> Tmp =
2020 TLI.makeLibCall(DAG, LC, N->getValueType(0), Ops,
2021 CallOptions, SDLoc(N), SDValue());
2022 ReplaceValueWith(SDValue(N, 0), Tmp.first);
2023 return SDValue();
2024}
2025
2026SDValue DAGTypeLegalizer::PromoteIntOp_VECREDUCE(SDNode *N) {
2027 SDLoc dl(N);
2028 SDValue Op;
2029 switch (N->getOpcode()) {
2030 default: llvm_unreachable("Expected integer vector reduction")__builtin_unreachable();
2031 case ISD::VECREDUCE_ADD:
2032 case ISD::VECREDUCE_MUL:
2033 case ISD::VECREDUCE_AND:
2034 case ISD::VECREDUCE_OR:
2035 case ISD::VECREDUCE_XOR:
2036 Op = GetPromotedInteger(N->getOperand(0));
2037 break;
2038 case ISD::VECREDUCE_SMAX:
2039 case ISD::VECREDUCE_SMIN:
2040 Op = SExtPromotedInteger(N->getOperand(0));
2041 break;
2042 case ISD::VECREDUCE_UMAX:
2043 case ISD::VECREDUCE_UMIN:
2044 Op = ZExtPromotedInteger(N->getOperand(0));
2045 break;
2046 }
2047
2048 EVT EltVT = Op.getValueType().getVectorElementType();
2049 EVT VT = N->getValueType(0);
2050 if (VT.bitsGE(EltVT))
2051 return DAG.getNode(N->getOpcode(), SDLoc(N), VT, Op);
2052
2053 // Result size must be >= element size. If this is not the case after
2054 // promotion, also promote the result type and then truncate.
2055 SDValue Reduce = DAG.getNode(N->getOpcode(), dl, EltVT, Op);
2056 return DAG.getNode(ISD::TRUNCATE, dl, VT, Reduce);
2057}
2058
2059SDValue DAGTypeLegalizer::PromoteIntOp_SET_ROUNDING(SDNode *N) {
2060 SDValue Op = ZExtPromotedInteger(N->getOperand(1));
2061 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0), Op), 0);
2062}
2063
2064//===----------------------------------------------------------------------===//
2065// Integer Result Expansion
2066//===----------------------------------------------------------------------===//
2067
2068/// ExpandIntegerResult - This method is called when the specified result of the
2069/// specified node is found to need expansion. At this point, the node may also
2070/// have invalid operands or may have other results that need promotion, we just
2071/// know that (at least) one result needs expansion.
2072void DAGTypeLegalizer::ExpandIntegerResult(SDNode *N, unsigned ResNo) {
2073 LLVM_DEBUG(dbgs() << "Expand integer result: "; N->dump(&DAG);do { } while (false)
1
Loop condition is false. Exiting loop
→
2074 dbgs() << "\n")do { } while (false);
2075 SDValue Lo, Hi;
2076 Lo = Hi = SDValue();
2077
2078 // See if the target wants to custom expand this node.
2079 if (CustomLowerNode(N, N->getValueType(ResNo), true))
2
←
Assuming the condition is false
→
3
←
Taking false branch
→
2080 return;
2081
2082 switch (N->getOpcode()) {
4
←
Control jumps to 'case SHL:' at line 2202
→
2083 default:
2084#ifndef NDEBUG1
2085 dbgs() << "ExpandIntegerResult #" << ResNo << ": ";
2086 N->dump(&DAG); dbgs() << "\n";
2087#endif
2088 report_fatal_error("Do not know how to expand the result of this "
2089 "operator!");
2090
2091 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
2092 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
2093 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
2094 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
2095 case ISD::FREEZE: SplitRes_FREEZE(N, Lo, Hi); break;
2096
2097 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
2098 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
2099 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
2100 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
2101 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
2102
2103 case ISD::ANY_EXTEND: ExpandIntRes_ANY_EXTEND(N, Lo, Hi); break;
2104 case ISD::AssertSext: ExpandIntRes_AssertSext(N, Lo, Hi); break;
2105 case ISD::AssertZext: ExpandIntRes_AssertZext(N, Lo, Hi); break;
2106 case ISD::BITREVERSE: ExpandIntRes_BITREVERSE(N, Lo, Hi); break;
2107 case ISD::BSWAP: ExpandIntRes_BSWAP(N, Lo, Hi); break;
2108 case ISD::PARITY: ExpandIntRes_PARITY(N, Lo, Hi); break;
2109 case ISD::Constant: ExpandIntRes_Constant(N, Lo, Hi); break;
2110 case ISD::ABS: ExpandIntRes_ABS(N, Lo, Hi); break;
2111 case ISD::CTLZ_ZERO_UNDEF:
2112 case ISD::CTLZ: ExpandIntRes_CTLZ(N, Lo, Hi); break;
2113 case ISD::CTPOP: ExpandIntRes_CTPOP(N, Lo, Hi); break;
2114 case ISD::CTTZ_ZERO_UNDEF:
2115 case ISD::CTTZ: ExpandIntRes_CTTZ(N, Lo, Hi); break;
2116 case ISD::FLT_ROUNDS_: ExpandIntRes_FLT_ROUNDS(N, Lo, Hi); break;
2117 case ISD::STRICT_FP_TO_SINT:
2118 case ISD::FP_TO_SINT: ExpandIntRes_FP_TO_SINT(N, Lo, Hi); break;
2119 case ISD::STRICT_FP_TO_UINT:
2120 case ISD::FP_TO_UINT: ExpandIntRes_FP_TO_UINT(N, Lo, Hi); break;
2121 case ISD::FP_TO_SINT_SAT:
2122 case ISD::FP_TO_UINT_SAT: ExpandIntRes_FP_TO_XINT_SAT(N, Lo, Hi); break;
2123 case ISD::STRICT_LLROUND:
2124 case ISD::STRICT_LLRINT:
2125 case ISD::LLROUND:
2126 case ISD::LLRINT: ExpandIntRes_LLROUND_LLRINT(N, Lo, Hi); break;
2127 case ISD::LOAD: ExpandIntRes_LOAD(cast<LoadSDNode>(N), Lo, Hi); break;
2128 case ISD::MUL: ExpandIntRes_MUL(N, Lo, Hi); break;
2129 case ISD::READCYCLECOUNTER: ExpandIntRes_READCYCLECOUNTER(N, Lo, Hi); break;
2130 case ISD::SDIV: ExpandIntRes_SDIV(N, Lo, Hi); break;
2131 case ISD::SIGN_EXTEND: ExpandIntRes_SIGN_EXTEND(N, Lo, Hi); break;
2132 case ISD::SIGN_EXTEND_INREG: ExpandIntRes_SIGN_EXTEND_INREG(N, Lo, Hi); break;
2133 case ISD::SREM: ExpandIntRes_SREM(N, Lo, Hi); break;
2134 case ISD::TRUNCATE: ExpandIntRes_TRUNCATE(N, Lo, Hi); break;
2135 case ISD::UDIV: ExpandIntRes_UDIV(N, Lo, Hi); break;
2136 case ISD::UREM: ExpandIntRes_UREM(N, Lo, Hi); break;
2137 case ISD::ZERO_EXTEND: ExpandIntRes_ZERO_EXTEND(N, Lo, Hi); break;
2138 case ISD::ATOMIC_LOAD: ExpandIntRes_ATOMIC_LOAD(N, Lo, Hi); break;
2139
2140 case ISD::ATOMIC_LOAD_ADD:
2141 case ISD::ATOMIC_LOAD_SUB:
2142 case ISD::ATOMIC_LOAD_AND:
2143 case ISD::ATOMIC_LOAD_CLR:
2144 case ISD::ATOMIC_LOAD_OR:
2145 case ISD::ATOMIC_LOAD_XOR:
2146 case ISD::ATOMIC_LOAD_NAND:
2147 case ISD::ATOMIC_LOAD_MIN:
2148 case ISD::ATOMIC_LOAD_MAX:
2149 case ISD::ATOMIC_LOAD_UMIN:
2150 case ISD::ATOMIC_LOAD_UMAX:
2151 case ISD::ATOMIC_SWAP:
2152 case ISD::ATOMIC_CMP_SWAP: {
2153 std::pair<SDValue, SDValue> Tmp = ExpandAtomic(N);
2154 SplitInteger(Tmp.first, Lo, Hi);
2155 ReplaceValueWith(SDValue(N, 1), Tmp.second);
2156 break;
2157 }
2158 case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS: {
2159 AtomicSDNode *AN = cast<AtomicSDNode>(N);
2160 SDVTList VTs = DAG.getVTList(N->getValueType(0), MVT::Other);
2161 SDValue Tmp = DAG.getAtomicCmpSwap(
2162 ISD::ATOMIC_CMP_SWAP, SDLoc(N), AN->getMemoryVT(), VTs,
2163 N->getOperand(0), N->getOperand(1), N->getOperand(2), N->getOperand(3),
2164 AN->getMemOperand());
2165
2166 // Expanding to the strong ATOMIC_CMP_SWAP node means we can determine
2167 // success simply by comparing the loaded value against the ingoing
2168 // comparison.
2169 SDValue Success = DAG.getSetCC(SDLoc(N), N->getValueType(1), Tmp,
2170 N->getOperand(2), ISD::SETEQ);
2171
2172 SplitInteger(Tmp, Lo, Hi);
2173 ReplaceValueWith(SDValue(N, 1), Success);
2174 ReplaceValueWith(SDValue(N, 2), Tmp.getValue(1));
2175 break;
2176 }
2177
2178 case ISD::AND:
2179 case ISD::OR:
2180 case ISD::XOR: ExpandIntRes_Logical(N, Lo, Hi); break;
2181
2182 case ISD::UMAX:
2183 case ISD::SMAX:
2184 case ISD::UMIN:
2185 case ISD::SMIN: ExpandIntRes_MINMAX(N, Lo, Hi); break;
2186
2187 case ISD::ADD:
2188 case ISD::SUB: ExpandIntRes_ADDSUB(N, Lo, Hi); break;
2189
2190 case ISD::ADDC:
2191 case ISD::SUBC: ExpandIntRes_ADDSUBC(N, Lo, Hi); break;
2192
2193 case ISD::ADDE:
2194 case ISD::SUBE: ExpandIntRes_ADDSUBE(N, Lo, Hi); break;
2195
2196 case ISD::ADDCARRY:
2197 case ISD::SUBCARRY: ExpandIntRes_ADDSUBCARRY(N, Lo, Hi); break;
2198
2199 case ISD::SADDO_CARRY:
2200 case ISD::SSUBO_CARRY: ExpandIntRes_SADDSUBO_CARRY(N, Lo, Hi); break;
2201
2202 case ISD::SHL:
2203 case ISD::SRA:
2204 case ISD::SRL: ExpandIntRes_Shift(N, Lo, Hi); break;
5
←
Calling 'DAGTypeLegalizer::ExpandIntRes_Shift'
→
2205
2206 case ISD::SADDO:
2207 case ISD::SSUBO: ExpandIntRes_SADDSUBO(N, Lo, Hi); break;
2208 case ISD::UADDO:
2209 case ISD::USUBO: ExpandIntRes_UADDSUBO(N, Lo, Hi); break;
2210 case ISD::UMULO:
2211 case ISD::SMULO: ExpandIntRes_XMULO(N, Lo, Hi); break;
2212
2213 case ISD::SADDSAT:
2214 case ISD::UADDSAT:
2215 case ISD::SSUBSAT:
2216 case ISD::USUBSAT: ExpandIntRes_ADDSUBSAT(N, Lo, Hi); break;
2217
2218 case ISD::SSHLSAT:
2219 case ISD::USHLSAT: ExpandIntRes_SHLSAT(N, Lo, Hi); break;
2220
2221 case ISD::SMULFIX:
2222 case ISD::SMULFIXSAT:
2223 case ISD::UMULFIX:
2224 case ISD::UMULFIXSAT: ExpandIntRes_MULFIX(N, Lo, Hi); break;
2225
2226 case ISD::SDIVFIX:
2227 case ISD::SDIVFIXSAT:
2228 case ISD::UDIVFIX:
2229 case ISD::UDIVFIXSAT: ExpandIntRes_DIVFIX(N, Lo, Hi); break;
2230
2231 case ISD::VECREDUCE_ADD:
2232 case ISD::VECREDUCE_MUL:
2233 case ISD::VECREDUCE_AND:
2234 case ISD::VECREDUCE_OR:
2235 case ISD::VECREDUCE_XOR:
2236 case ISD::VECREDUCE_SMAX:
2237 case ISD::VECREDUCE_SMIN:
2238 case ISD::VECREDUCE_UMAX:
2239 case ISD::VECREDUCE_UMIN: ExpandIntRes_VECREDUCE(N, Lo, Hi); break;
2240
2241 case ISD::ROTL:
2242 case ISD::ROTR:
2243 ExpandIntRes_Rotate(N, Lo, Hi);
2244 break;
2245
2246 case ISD::FSHL:
2247 case ISD::FSHR:
2248 ExpandIntRes_FunnelShift(N, Lo, Hi);
2249 break;
2250
2251 case ISD::VSCALE:
2252 ExpandIntRes_VSCALE(N, Lo, Hi);
2253 break;
2254 }
2255
2256 // If Lo/Hi is null, the sub-method took care of registering results etc.
2257 if (Lo.getNode())
2258 SetExpandedInteger(SDValue(N, ResNo), Lo, Hi);
2259}
2260
2261/// Lower an atomic node to the appropriate builtin call.
2262std::pair <SDValue, SDValue> DAGTypeLegalizer::ExpandAtomic(SDNode *Node) {
2263 unsigned Opc = Node->getOpcode();
2264 MVT VT = cast<AtomicSDNode>(Node)->getMemoryVT().getSimpleVT();
2265 AtomicOrdering order = cast<AtomicSDNode>(Node)->getMergedOrdering();
2266 // Lower to outline atomic libcall if outline atomics enabled,
2267 // or to sync libcall otherwise
2268 RTLIB::Libcall LC = RTLIB::getOUTLINE_ATOMIC(Opc, order, VT);
2269 EVT RetVT = Node->getValueType(0);
2270 TargetLowering::MakeLibCallOptions CallOptions;
2271 SmallVector<SDValue, 4> Ops;
2272 if (TLI.getLibcallName(LC)) {
2273 Ops.append(Node->op_begin() + 2, Node->op_end());
2274 Ops.push_back(Node->getOperand(1));
2275 } else {
2276 LC = RTLIB::getSYNC(Opc, VT);
2277 assert(LC != RTLIB::UNKNOWN_LIBCALL &&((void)0)
2278 "Unexpected atomic op or value type!")((void)0);
2279 Ops.append(Node->op_begin() + 1, Node->op_end());
2280 }
2281 return TLI.makeLibCall(DAG, LC, RetVT, Ops, CallOptions, SDLoc(Node),
2282 Node->getOperand(0));
2283}
2284
2285/// N is a shift by a value that needs to be expanded,
2286/// and the shift amount is a constant 'Amt'. Expand the operation.
2287void DAGTypeLegalizer::ExpandShiftByConstant(SDNode *N, const APInt &Amt,
2288 SDValue &Lo, SDValue &Hi) {
2289 SDLoc DL(N);
2290 // Expand the incoming operand to be shifted, so that we have its parts
2291 SDValue InL, InH;
2292 GetExpandedInteger(N->getOperand(0), InL, InH);
2293
2294 // Though Amt shouldn't usually be 0, it's possible. E.g. when legalization
2295 // splitted a vector shift, like this: <op1, op2> SHL <0, 2>.
2296 if (!Amt) {
2297 Lo = InL;
2298 Hi = InH;
2299 return;
2300 }
2301
2302 EVT NVT = InL.getValueType();
2303 unsigned VTBits = N->getValueType(0).getSizeInBits();
2304 unsigned NVTBits = NVT.getSizeInBits();
2305 EVT ShTy = N->getOperand(1).getValueType();
2306
2307 if (N->getOpcode() == ISD::SHL) {
2308 if (Amt.ugt(VTBits)) {
2309 Lo = Hi = DAG.getConstant(0, DL, NVT);
2310 } else if (Amt.ugt(NVTBits)) {
2311 Lo = DAG.getConstant(0, DL, NVT);
2312 Hi = DAG.getNode(ISD::SHL, DL,
2313 NVT, InL, DAG.getConstant(Amt - NVTBits, DL, ShTy));
2314 } else if (Amt == NVTBits) {
2315 Lo = DAG.getConstant(0, DL, NVT);
2316 Hi = InL;
2317 } else {
2318 Lo = DAG.getNode(ISD::SHL, DL, NVT, InL, DAG.getConstant(Amt, DL, ShTy));
2319 Hi = DAG.getNode(ISD::OR, DL, NVT,
2320 DAG.getNode(ISD::SHL, DL, NVT, InH,
2321 DAG.getConstant(Amt, DL, ShTy)),
2322 DAG.getNode(ISD::SRL, DL, NVT, InL,
2323 DAG.getConstant(-Amt + NVTBits, DL, ShTy)));
2324 }
2325 return;
2326 }
2327
2328 if (N->getOpcode() == ISD::SRL) {
2329 if (Amt.ugt(VTBits)) {
2330 Lo = Hi = DAG.getConstant(0, DL, NVT);
2331 } else if (Amt.ugt(NVTBits)) {
2332 Lo = DAG.getNode(ISD::SRL, DL,
2333 NVT, InH, DAG.getConstant(Amt - NVTBits, DL, ShTy));
2334 Hi = DAG.getConstant(0, DL, NVT);
2335 } else if (Amt == NVTBits) {
2336 Lo = InH;
2337 Hi = DAG.getConstant(0, DL, NVT);
2338 } else {
2339 Lo = DAG.getNode(ISD::OR, DL, NVT,
2340 DAG.getNode(ISD::SRL, DL, NVT, InL,
2341 DAG.getConstant(Amt, DL, ShTy)),
2342 DAG.getNode(ISD::SHL, DL, NVT, InH,
2343 DAG.getConstant(-Amt + NVTBits, DL, ShTy)));
2344 Hi = DAG.getNode(ISD::SRL, DL, NVT, InH, DAG.getConstant(Amt, DL, ShTy));
2345 }
2346 return;
2347 }
2348
2349 assert(N->getOpcode() == ISD::SRA && "Unknown shift!")((void)0);
2350 if (Amt.ugt(VTBits)) {
2351 Hi = Lo = DAG.getNode(ISD::SRA, DL, NVT, InH,
2352 DAG.getConstant(NVTBits - 1, DL, ShTy));
2353 } else if (Amt.ugt(NVTBits)) {
2354 Lo = DAG.getNode(ISD::SRA, DL, NVT, InH,
2355 DAG.getConstant(Amt - NVTBits, DL, ShTy));
2356 Hi = DAG.getNode(ISD::SRA, DL, NVT, InH,
2357 DAG.getConstant(NVTBits - 1, DL, ShTy));
2358 } else if (Amt == NVTBits) {
2359 Lo = InH;
2360 Hi = DAG.getNode(ISD::SRA, DL, NVT, InH,
2361 DAG.getConstant(NVTBits - 1, DL, ShTy));
2362 } else {
2363 Lo = DAG.getNode(ISD::OR, DL, NVT,
2364 DAG.getNode(ISD::SRL, DL, NVT, InL,
2365 DAG.getConstant(Amt, DL, ShTy)),
2366 DAG.getNode(ISD::SHL, DL, NVT, InH,
2367 DAG.getConstant(-Amt + NVTBits, DL, ShTy)));
2368 Hi = DAG.getNode(ISD::SRA, DL, NVT, InH, DAG.getConstant(Amt, DL, ShTy));
2369 }
2370}
2371
2372/// ExpandShiftWithKnownAmountBit - Try to determine whether we can simplify
2373/// this shift based on knowledge of the high bit of the shift amount. If we
2374/// can tell this, we know that it is >= 32 or < 32, without knowing the actual
2375/// shift amount.
2376bool DAGTypeLegalizer::
2377ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi) {
2378 SDValue Amt = N->getOperand(1);
9
←
Value assigned to 'Amt.Node'
→
2379 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2380 EVT ShTy = Amt.getValueType();
10
←
Calling 'SDValue::getValueType'
→
2381 unsigned ShBits = ShTy.getScalarSizeInBits();
2382 unsigned NVTBits = NVT.getScalarSizeInBits();
2383 assert(isPowerOf2_32(NVTBits) &&((void)0)
2384 "Expanded integer type size not a power of two!")((void)0);
2385 SDLoc dl(N);
2386
2387 APInt HighBitMask = APInt::getHighBitsSet(ShBits, ShBits - Log2_32(NVTBits));
2388 KnownBits Known = DAG.computeKnownBits(N->getOperand(1));
2389
2390 // If we don't know anything about the high bits, exit.
2391 if (((Known.Zero|Known.One) & HighBitMask) == 0)
2392 return false;
2393
2394 // Get the incoming operand to be shifted.
2395 SDValue InL, InH;
2396 GetExpandedInteger(N->getOperand(0), InL, InH);
2397
2398 // If we know that any of the high bits of the shift amount are one, then we
2399 // can do this as a couple of simple shifts.
2400 if (Known.One.intersects(HighBitMask)) {
2401 // Mask out the high bit, which we know is set.
2402 Amt = DAG.getNode(ISD::AND, dl, ShTy, Amt,
2403 DAG.getConstant(~HighBitMask, dl, ShTy));
2404
2405 switch (N->getOpcode()) {
2406 default: llvm_unreachable("Unknown shift")__builtin_unreachable();
2407 case ISD::SHL:
2408 Lo = DAG.getConstant(0, dl, NVT); // Low part is zero.
2409 Hi = DAG.getNode(ISD::SHL, dl, NVT, InL, Amt); // High part from Lo part.
2410 return true;
2411 case ISD::SRL:
2412 Hi = DAG.getConstant(0, dl, NVT); // Hi part is zero.
2413 Lo = DAG.getNode(ISD::SRL, dl, NVT, InH, Amt); // Lo part from Hi part.
2414 return true;
2415 case ISD::SRA:
2416 Hi = DAG.getNode(ISD::SRA, dl, NVT, InH, // Sign extend high part.
2417 DAG.getConstant(NVTBits - 1, dl, ShTy));
2418 Lo = DAG.getNode(ISD::SRA, dl, NVT, InH, Amt); // Lo part from Hi part.
2419 return true;
2420 }
2421 }
2422
2423 // If we know that all of the high bits of the shift amount are zero, then we
2424 // can do this as a couple of simple shifts.
2425 if (HighBitMask.isSubsetOf(Known.Zero)) {
2426 // Calculate 31-x. 31 is used instead of 32 to avoid creating an undefined
2427 // shift if x is zero. We can use XOR here because x is known to be smaller
2428 // than 32.
2429 SDValue Amt2 = DAG.getNode(ISD::XOR, dl, ShTy, Amt,
2430 DAG.getConstant(NVTBits - 1, dl, ShTy));
2431
2432 unsigned Op1, Op2;
2433 switch (N->getOpcode()) {
2434 default: llvm_unreachable("Unknown shift")__builtin_unreachable();
2435 case ISD::SHL: Op1 = ISD::SHL; Op2 = ISD::SRL; break;
2436 case ISD::SRL:
2437 case ISD::SRA: Op1 = ISD::SRL; Op2 = ISD::SHL; break;
2438 }
2439
2440 // When shifting right the arithmetic for Lo and Hi is swapped.
2441 if (N->getOpcode() != ISD::SHL)
2442 std::swap(InL, InH);
2443
2444 // Use a little trick to get the bits that move from Lo to Hi. First
2445 // shift by one bit.
2446 SDValue Sh1 = DAG.getNode(Op2, dl, NVT, InL, DAG.getConstant(1, dl, ShTy));
2447 // Then compute the remaining shift with amount-1.
2448 SDValue Sh2 = DAG.getNode(Op2, dl, NVT, Sh1, Amt2);
2449
2450 Lo = DAG.getNode(N->getOpcode(), dl, NVT, InL, Amt);
2451 Hi = DAG.getNode(ISD::OR, dl, NVT, DAG.getNode(Op1, dl, NVT, InH, Amt),Sh2);
2452
2453 if (N->getOpcode() != ISD::SHL)
2454 std::swap(Hi, Lo);
2455 return true;
2456 }
2457
2458 return false;
2459}
2460
2461/// ExpandShiftWithUnknownAmountBit - Fully general expansion of integer shift
2462/// of any size.
2463bool DAGTypeLegalizer::
2464ExpandShiftWithUnknownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi) {
2465 SDValue Amt = N->getOperand(1);
2466 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2467 EVT ShTy = Amt.getValueType();
2468 unsigned NVTBits = NVT.getSizeInBits();
2469 assert(isPowerOf2_32(NVTBits) &&((void)0)
2470 "Expanded integer type size not a power of two!")((void)0);
2471 SDLoc dl(N);
2472
2473 // Get the incoming operand to be shifted.
2474 SDValue InL, InH;
2475 GetExpandedInteger(N->getOperand(0), InL, InH);
2476
2477 SDValue NVBitsNode = DAG.getConstant(NVTBits, dl, ShTy);
2478 SDValue AmtExcess = DAG.getNode(ISD::SUB, dl, ShTy, Amt, NVBitsNode);
2479 SDValue AmtLack = DAG.getNode(ISD::SUB, dl, ShTy, NVBitsNode, Amt);
2480 SDValue isShort = DAG.getSetCC(dl, getSetCCResultType(ShTy),
2481 Amt, NVBitsNode, ISD::SETULT);
2482 SDValue isZero = DAG.getSetCC(dl, getSetCCResultType(ShTy),
2483 Amt, DAG.getConstant(0, dl, ShTy),
2484 ISD::SETEQ);
2485
2486 SDValue LoS, HiS, LoL, HiL;
2487 switch (N->getOpcode()) {
2488 default: llvm_unreachable("Unknown shift")__builtin_unreachable();
2489 case ISD::SHL:
2490 // Short: ShAmt < NVTBits
2491 LoS = DAG.getNode(ISD::SHL, dl, NVT, InL, Amt);
2492 HiS = DAG.getNode(ISD::OR, dl, NVT,
2493 DAG.getNode(ISD::SHL, dl, NVT, InH, Amt),
2494 DAG.getNode(ISD::SRL, dl, NVT, InL, AmtLack));
2495
2496 // Long: ShAmt >= NVTBits
2497 LoL = DAG.getConstant(0, dl, NVT); // Lo part is zero.
2498 HiL = DAG.getNode(ISD::SHL, dl, NVT, InL, AmtExcess); // Hi from Lo part.
2499
2500 Lo = DAG.getSelect(dl, NVT, isShort, LoS, LoL);
2501 Hi = DAG.getSelect(dl, NVT, isZero, InH,
2502 DAG.getSelect(dl, NVT, isShort, HiS, HiL));
2503 return true;
2504 case ISD::SRL:
2505 // Short: ShAmt < NVTBits
2506 HiS = DAG.getNode(ISD::SRL, dl, NVT, InH, Amt);
2507 LoS = DAG.getNode(ISD::OR, dl, NVT,
2508 DAG.getNode(ISD::SRL, dl, NVT, InL, Amt),
2509 // FIXME: If Amt is zero, the following shift generates an undefined result
2510 // on some architectures.
2511 DAG.getNode(ISD::SHL, dl, NVT, InH, AmtLack));
2512
2513 // Long: ShAmt >= NVTBits
2514 HiL = DAG.getConstant(0, dl, NVT); // Hi part is zero.
2515 LoL = DAG.getNode(ISD::SRL, dl, NVT, InH, AmtExcess); // Lo from Hi part.
2516
2517 Lo = DAG.getSelect(dl, NVT, isZero, InL,
2518 DAG.getSelect(dl, NVT, isShort, LoS, LoL));
2519 Hi = DAG.getSelect(dl, NVT, isShort, HiS, HiL);
2520 return true;
2521 case ISD::SRA:
2522 // Short: ShAmt < NVTBits
2523 HiS = DAG.getNode(ISD::SRA, dl, NVT, InH, Amt);
2524 LoS = DAG.getNode(ISD::OR, dl, NVT,
2525 DAG.getNode(ISD::SRL, dl, NVT, InL, Amt),
2526 DAG.getNode(ISD::SHL, dl, NVT, InH, AmtLack));
2527
2528 // Long: ShAmt >= NVTBits
2529 HiL = DAG.getNode(ISD::SRA, dl, NVT, InH, // Sign of Hi part.
2530 DAG.getConstant(NVTBits - 1, dl, ShTy));
2531 LoL = DAG.getNode(ISD::SRA, dl, NVT, InH, AmtExcess); // Lo from Hi part.
2532
2533 Lo = DAG.getSelect(dl, NVT, isZero, InL,
2534 DAG.getSelect(dl, NVT, isShort, LoS, LoL));
2535 Hi = DAG.getSelect(dl, NVT, isShort, HiS, HiL);
2536 return true;
2537 }
2538}
2539
2540static std::pair<ISD::CondCode, ISD::NodeType> getExpandedMinMaxOps(int Op) {
2541
2542 switch (Op) {
2543 default: llvm_unreachable("invalid min/max opcode")__builtin_unreachable();
2544 case ISD::SMAX:
2545 return std::make_pair(ISD::SETGT, ISD::UMAX);
2546 case ISD::UMAX:
2547 return std::make_pair(ISD::SETUGT, ISD::UMAX);
2548 case ISD::SMIN:
2549 return std::make_pair(ISD::SETLT, ISD::UMIN);
2550 case ISD::UMIN:
2551 return std::make_pair(ISD::SETULT, ISD::UMIN);
2552 }
2553}
2554
2555void DAGTypeLegalizer::ExpandIntRes_MINMAX(SDNode *N,
2556 SDValue &Lo, SDValue &Hi) {
2557 SDLoc DL(N);
2558 ISD::NodeType LoOpc;
2559 ISD::CondCode CondC;
2560 std::tie(CondC, LoOpc) = getExpandedMinMaxOps(N->getOpcode());
2561
2562 // Expand the subcomponents.
2563 SDValue LHSL, LHSH, RHSL, RHSH;
2564 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
2565 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
2566
2567 // Value types
2568 EVT NVT = LHSL.getValueType();
2569 EVT CCT = getSetCCResultType(NVT);
2570
2571 // Hi part is always the same op
2572 Hi = DAG.getNode(N->getOpcode(), DL, NVT, {LHSH, RHSH});
2573
2574 // We need to know whether to select Lo part that corresponds to 'winning'
2575 // Hi part or if Hi parts are equal.
2576 SDValue IsHiLeft = DAG.getSetCC(DL, CCT, LHSH, RHSH, CondC);
2577 SDValue IsHiEq = DAG.getSetCC(DL, CCT, LHSH, RHSH, ISD::SETEQ);
2578
2579 // Lo part corresponding to the 'winning' Hi part
2580 SDValue LoCmp = DAG.getSelect(DL, NVT, IsHiLeft, LHSL, RHSL);
2581
2582 // Recursed Lo part if Hi parts are equal, this uses unsigned version
2583 SDValue LoMinMax = DAG.getNode(LoOpc, DL, NVT, {LHSL, RHSL});
2584
2585 Lo = DAG.getSelect(DL, NVT, IsHiEq, LoMinMax, LoCmp);
2586}
2587
2588void DAGTypeLegalizer::ExpandIntRes_ADDSUB(SDNode *N,
2589 SDValue &Lo, SDValue &Hi) {
2590 SDLoc dl(N);
2591 // Expand the subcomponents.
2592 SDValue LHSL, LHSH, RHSL, RHSH;
2593 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
2594 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
2595
2596 EVT NVT = LHSL.getValueType();
2597 SDValue LoOps[2] = { LHSL, RHSL };
2598 SDValue HiOps[3] = { LHSH, RHSH };
2599
2600 bool HasOpCarry = TLI.isOperationLegalOrCustom(
2601 N->getOpcode() == ISD::ADD ? ISD::ADDCARRY : ISD::SUBCARRY,
2602 TLI.getTypeToExpandTo(*DAG.getContext(), NVT));
2603 if (HasOpCarry) {
2604 SDVTList VTList = DAG.getVTList(NVT, getSetCCResultType(NVT));
2605 if (N->getOpcode() == ISD::ADD) {
2606 Lo = DAG.getNode(ISD::UADDO, dl, VTList, LoOps);
2607 HiOps[2] = Lo.getValue(1);
2608 Hi = DAG.getNode(ISD::ADDCARRY, dl, VTList, HiOps);
2609 } else {
2610 Lo = DAG.getNode(ISD::USUBO, dl, VTList, LoOps);
2611 HiOps[2] = Lo.getValue(1);
2612 Hi = DAG.getNode(ISD::SUBCARRY, dl, VTList, HiOps);
2613 }
2614 return;
2615 }
2616
2617 // Do not generate ADDC/ADDE or SUBC/SUBE if the target does not support
2618 // them. TODO: Teach operation legalization how to expand unsupported
2619 // ADDC/ADDE/SUBC/SUBE. The problem is that these operations generate
2620 // a carry of type MVT::Glue, but there doesn't seem to be any way to
2621 // generate a value of this type in the expanded code sequence.
2622 bool hasCarry =
2623 TLI.isOperationLegalOrCustom(N->getOpcode() == ISD::ADD ?
2624 ISD::ADDC : ISD::SUBC,
2625 TLI.getTypeToExpandTo(*DAG.getContext(), NVT));
2626
2627 if (hasCarry) {
2628 SDVTList VTList = DAG.getVTList(NVT, MVT::Glue);
2629 if (N->getOpcode() == ISD::ADD) {
2630 Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps);
2631 HiOps[2] = Lo.getValue(1);
2632 Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps);
2633 } else {
2634 Lo = DAG.getNode(ISD::SUBC, dl, VTList, LoOps);
2635 HiOps[2] = Lo.getValue(1);
2636 Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps);
2637 }
2638 return;
2639 }
2640
2641 bool hasOVF =
2642 TLI.isOperationLegalOrCustom(N->getOpcode() == ISD::ADD ?
2643 ISD::UADDO : ISD::USUBO,
2644 TLI.getTypeToExpandTo(*DAG.getContext(), NVT));
2645 TargetLoweringBase::BooleanContent BoolType = TLI.getBooleanContents(NVT);
2646
2647 if (hasOVF) {
2648 EVT OvfVT = getSetCCResultType(NVT);
2649 SDVTList VTList = DAG.getVTList(NVT, OvfVT);
2650 int RevOpc;
2651 if (N->getOpcode() == ISD::ADD) {
2652 RevOpc = ISD::SUB;
2653 Lo = DAG.getNode(ISD::UADDO, dl, VTList, LoOps);
2654 Hi = DAG.getNode(ISD::ADD, dl, NVT, makeArrayRef(HiOps, 2));
2655 } else {
2656 RevOpc = ISD::ADD;
2657 Lo = DAG.getNode(ISD::USUBO, dl, VTList, LoOps);
2658 Hi = DAG.getNode(ISD::SUB, dl, NVT, makeArrayRef(HiOps, 2));
2659 }
2660 SDValue OVF = Lo.getValue(1);
2661
2662 switch (BoolType) {
2663 case TargetLoweringBase::UndefinedBooleanContent:
2664 OVF = DAG.getNode(ISD::AND, dl, OvfVT, DAG.getConstant(1, dl, OvfVT), OVF);
2665 LLVM_FALLTHROUGH[[gnu::fallthrough]];
2666 case TargetLoweringBase::ZeroOrOneBooleanContent:
2667 OVF = DAG.getZExtOrTrunc(OVF, dl, NVT);
2668 Hi = DAG.getNode(N->getOpcode(), dl, NVT, Hi, OVF);
2669 break;
2670 case TargetLoweringBase::ZeroOrNegativeOneBooleanContent:
2671 OVF = DAG.getSExtOrTrunc(OVF, dl, NVT);
2672 Hi = DAG.getNode(RevOpc, dl, NVT, Hi, OVF);
2673 }
2674 return;
2675 }
2676
2677 if (N->getOpcode() == ISD::ADD) {
2678 Lo = DAG.getNode(ISD::ADD, dl, NVT, LoOps);
2679 Hi = DAG.getNode(ISD::ADD, dl, NVT, makeArrayRef(HiOps, 2));
2680 SDValue Cmp1 = DAG.getSetCC(dl, getSetCCResultType(NVT), Lo, LoOps[0],
2681 ISD::SETULT);
2682
2683 if (BoolType == TargetLoweringBase::ZeroOrOneBooleanContent) {
2684 SDValue Carry = DAG.getZExtOrTrunc(Cmp1, dl, NVT);
2685 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, Carry);
2686 return;
2687 }
2688
2689 SDValue Carry1 = DAG.getSelect(dl, NVT, Cmp1,
2690 DAG.getConstant(1, dl, NVT),
2691 DAG.getConstant(0, dl, NVT));
2692 SDValue Cmp2 = DAG.getSetCC(dl, getSetCCResultType(NVT), Lo, LoOps[1],
2693 ISD::SETULT);
2694 SDValue Carry2 = DAG.getSelect(dl, NVT, Cmp2,
2695 DAG.getConstant(1, dl, NVT), Carry1);
2696 Hi = DAG.getNode(ISD::ADD, dl, NVT, Hi, Carry2);
2697 } else {
2698 Lo = DAG.getNode(ISD::SUB, dl, NVT, LoOps);
2699 Hi = DAG.getNode(ISD::SUB, dl, NVT, makeArrayRef(HiOps, 2));
2700 SDValue Cmp =
2701 DAG.getSetCC(dl, getSetCCResultType(LoOps[0].getValueType()),
2702 LoOps[0], LoOps[1], ISD::SETULT);
2703
2704 SDValue Borrow;
2705 if (BoolType == TargetLoweringBase::ZeroOrOneBooleanContent)
2706 Borrow = DAG.getZExtOrTrunc(Cmp, dl, NVT);
2707 else
2708 Borrow = DAG.getSelect(dl, NVT, Cmp, DAG.getConstant(1, dl, NVT),
2709 DAG.getConstant(0, dl, NVT));
2710
2711 Hi = DAG.getNode(ISD::SUB, dl, NVT, Hi, Borrow);
2712 }
2713}
2714
2715void DAGTypeLegalizer::ExpandIntRes_ADDSUBC(SDNode *N,
2716 SDValue &Lo, SDValue &Hi) {
2717 // Expand the subcomponents.
2718 SDValue LHSL, LHSH, RHSL, RHSH;
2719 SDLoc dl(N);
2720 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
2721 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
2722 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Glue);
2723 SDValue LoOps[2] = { LHSL, RHSL };
2724 SDValue HiOps[3] = { LHSH, RHSH };
2725
2726 if (N->getOpcode() == ISD::ADDC) {
2727 Lo = DAG.getNode(ISD::ADDC, dl, VTList, LoOps);
2728 HiOps[2] = Lo.getValue(1);
2729 Hi = DAG.getNode(ISD::ADDE, dl, VTList, HiOps);
2730 } else {
2731 Lo = DAG.getNode(ISD::SUBC, dl, VTList, LoOps);
2732 HiOps[2] = Lo.getValue(1);
2733 Hi = DAG.getNode(ISD::SUBE, dl, VTList, HiOps);
2734 }
2735
2736 // Legalized the flag result - switch anything that used the old flag to
2737 // use the new one.
2738 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
2739}
2740
2741void DAGTypeLegalizer::ExpandIntRes_ADDSUBE(SDNode *N,
2742 SDValue &Lo, SDValue &Hi) {
2743 // Expand the subcomponents.
2744 SDValue LHSL, LHSH, RHSL, RHSH;
2745 SDLoc dl(N);
2746 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
2747 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
2748 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), MVT::Glue);
2749 SDValue LoOps[3] = { LHSL, RHSL, N->getOperand(2) };
2750 SDValue HiOps[3] = { LHSH, RHSH };
2751
2752 Lo = DAG.getNode(N->getOpcode(), dl, VTList, LoOps);
2753 HiOps[2] = Lo.getValue(1);
2754 Hi = DAG.getNode(N->getOpcode(), dl, VTList, HiOps);
2755
2756 // Legalized the flag result - switch anything that used the old flag to
2757 // use the new one.
2758 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
2759}
2760
2761void DAGTypeLegalizer::ExpandIntRes_UADDSUBO(SDNode *N,
2762 SDValue &Lo, SDValue &Hi) {
2763 SDValue LHS = N->getOperand(0);
2764 SDValue RHS = N->getOperand(1);
2765 SDLoc dl(N);
2766
2767 SDValue Ovf;
2768
2769 unsigned CarryOp, NoCarryOp;
2770 ISD::CondCode Cond;
2771 switch(N->getOpcode()) {
2772 case ISD::UADDO:
2773 CarryOp = ISD::ADDCARRY;
2774 NoCarryOp = ISD::ADD;
2775 Cond = ISD::SETULT;
2776 break;
2777 case ISD::USUBO:
2778 CarryOp = ISD::SUBCARRY;
2779 NoCarryOp = ISD::SUB;
2780 Cond = ISD::SETUGT;
2781 break;
2782 default:
2783 llvm_unreachable("Node has unexpected Opcode")__builtin_unreachable();
2784 }
2785
2786 bool HasCarryOp = TLI.isOperationLegalOrCustom(
2787 CarryOp, TLI.getTypeToExpandTo(*DAG.getContext(), LHS.getValueType()));
2788
2789 if (HasCarryOp) {
2790 // Expand the subcomponents.
2791 SDValue LHSL, LHSH, RHSL, RHSH;
2792 GetExpandedInteger(LHS, LHSL, LHSH);
2793 GetExpandedInteger(RHS, RHSL, RHSH);
2794 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), N->getValueType(1));
2795 SDValue LoOps[2] = { LHSL, RHSL };
2796 SDValue HiOps[3] = { LHSH, RHSH };
2797
2798 Lo = DAG.getNode(N->getOpcode(), dl, VTList, LoOps);
2799 HiOps[2] = Lo.getValue(1);
2800 Hi = DAG.getNode(CarryOp, dl, VTList, HiOps);
2801
2802 Ovf = Hi.getValue(1);
2803 } else {
2804 // Expand the result by simply replacing it with the equivalent
2805 // non-overflow-checking operation.
2806 SDValue Sum = DAG.getNode(NoCarryOp, dl, LHS.getValueType(), LHS, RHS);
2807 SplitInteger(Sum, Lo, Hi);
2808
2809 // Calculate the overflow: addition overflows iff a + b < a, and subtraction
2810 // overflows iff a - b > a.
2811 Ovf = DAG.getSetCC(dl, N->getValueType(1), Sum, LHS, Cond);
2812 }
2813
2814 // Legalized the flag result - switch anything that used the old flag to
2815 // use the new one.
2816 ReplaceValueWith(SDValue(N, 1), Ovf);
2817}
2818
2819void DAGTypeLegalizer::ExpandIntRes_ADDSUBCARRY(SDNode *N,
2820 SDValue &Lo, SDValue &Hi) {
2821 // Expand the subcomponents.
2822 SDValue LHSL, LHSH, RHSL, RHSH;
2823 SDLoc dl(N);
2824 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
2825 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
2826 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), N->getValueType(1));
2827 SDValue LoOps[3] = { LHSL, RHSL, N->getOperand(2) };
2828 SDValue HiOps[3] = { LHSH, RHSH, SDValue() };
2829
2830 Lo = DAG.getNode(N->getOpcode(), dl, VTList, LoOps);
2831 HiOps[2] = Lo.getValue(1);
2832 Hi = DAG.getNode(N->getOpcode(), dl, VTList, HiOps);
2833
2834 // Legalized the flag result - switch anything that used the old flag to
2835 // use the new one.
2836 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
2837}
2838
2839void DAGTypeLegalizer::ExpandIntRes_SADDSUBO_CARRY(SDNode *N,
2840 SDValue &Lo, SDValue &Hi) {
2841 // Expand the subcomponents.
2842 SDValue LHSL, LHSH, RHSL, RHSH;
2843 SDLoc dl(N);
2844 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
2845 GetExpandedInteger(N->getOperand(1), RHSL, RHSH);
2846 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), N->getValueType(1));
2847
2848 // We need to use an unsigned carry op for the lo part.
2849 unsigned CarryOp = N->getOpcode() == ISD::SADDO_CARRY ? ISD::ADDCARRY
2850 : ISD::SUBCARRY;
2851 Lo = DAG.getNode(CarryOp, dl, VTList, { LHSL, RHSL, N->getOperand(2) });
2852 Hi = DAG.getNode(N->getOpcode(), dl, VTList, { LHSH, RHSH, Lo.getValue(1) });
2853
2854 // Legalized the flag result - switch anything that used the old flag to
2855 // use the new one.
2856 ReplaceValueWith(SDValue(N, 1), Hi.getValue(1));
2857}
2858
2859void DAGTypeLegalizer::ExpandIntRes_ANY_EXTEND(SDNode *N,
2860 SDValue &Lo, SDValue &Hi) {
2861 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2862 SDLoc dl(N);
2863 SDValue Op = N->getOperand(0);
2864 if (Op.getValueType().bitsLE(NVT)) {
2865 // The low part is any extension of the input (which degenerates to a copy).
2866 Lo = DAG.getNode(ISD::ANY_EXTEND, dl, NVT, Op);
2867 Hi = DAG.getUNDEF(NVT); // The high part is undefined.
2868 } else {
2869 // For example, extension of an i48 to an i64. The operand type necessarily
2870 // promotes to the result type, so will end up being expanded too.
2871 assert(getTypeAction(Op.getValueType()) ==((void)0)
2872 TargetLowering::TypePromoteInteger &&((void)0)
2873 "Only know how to promote this result!")((void)0);
2874 SDValue Res = GetPromotedInteger(Op);
2875 assert(Res.getValueType() == N->getValueType(0) &&((void)0)
2876 "Operand over promoted?")((void)0);
2877 // Split the promoted operand. This will simplify when it is expanded.
2878 SplitInteger(Res, Lo, Hi);
2879 }
2880}
2881
2882void DAGTypeLegalizer::ExpandIntRes_AssertSext(SDNode *N,
2883 SDValue &Lo, SDValue &Hi) {
2884 SDLoc dl(N);
2885 GetExpandedInteger(N->getOperand(0), Lo, Hi);
2886 EVT NVT = Lo.getValueType();
2887 EVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
2888 unsigned NVTBits = NVT.getSizeInBits();
2889 unsigned EVTBits = EVT.getSizeInBits();
2890
2891 if (NVTBits < EVTBits) {
2892 Hi = DAG.getNode(ISD::AssertSext, dl, NVT, Hi,
2893 DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(),
2894 EVTBits - NVTBits)));
2895 } else {
2896 Lo = DAG.getNode(ISD::AssertSext, dl, NVT, Lo, DAG.getValueType(EVT));
2897 // The high part replicates the sign bit of Lo, make it explicit.
2898 Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
2899 DAG.getConstant(NVTBits - 1, dl,
2900 TLI.getPointerTy(DAG.getDataLayout())));
2901 }
2902}
2903
2904void DAGTypeLegalizer::ExpandIntRes_AssertZext(SDNode *N,
2905 SDValue &Lo, SDValue &Hi) {
2906 SDLoc dl(N);
2907 GetExpandedInteger(N->getOperand(0), Lo, Hi);
2908 EVT NVT = Lo.getValueType();
2909 EVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
2910 unsigned NVTBits = NVT.getSizeInBits();
2911 unsigned EVTBits = EVT.getSizeInBits();
2912
2913 if (NVTBits < EVTBits) {
2914 Hi = DAG.getNode(ISD::AssertZext, dl, NVT, Hi,
2915 DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(),
2916 EVTBits - NVTBits)));
2917 } else {
2918 Lo = DAG.getNode(ISD::AssertZext, dl, NVT, Lo, DAG.getValueType(EVT));
2919 // The high part must be zero, make it explicit.
2920 Hi = DAG.getConstant(0, dl, NVT);
2921 }
2922}
2923
2924void DAGTypeLegalizer::ExpandIntRes_BITREVERSE(SDNode *N,
2925 SDValue &Lo, SDValue &Hi) {
2926 SDLoc dl(N);
2927 GetExpandedInteger(N->getOperand(0), Hi, Lo); // Note swapped operands.
2928 Lo = DAG.getNode(ISD::BITREVERSE, dl, Lo.getValueType(), Lo);
2929 Hi = DAG.getNode(ISD::BITREVERSE, dl, Hi.getValueType(), Hi);
2930}
2931
2932void DAGTypeLegalizer::ExpandIntRes_BSWAP(SDNode *N,
2933 SDValue &Lo, SDValue &Hi) {
2934 SDLoc dl(N);
2935 GetExpandedInteger(N->getOperand(0), Hi, Lo); // Note swapped operands.
2936 Lo = DAG.getNode(ISD::BSWAP, dl, Lo.getValueType(), Lo);
2937 Hi = DAG.getNode(ISD::BSWAP, dl, Hi.getValueType(), Hi);
2938}
2939
2940void DAGTypeLegalizer::ExpandIntRes_PARITY(SDNode *N, SDValue &Lo,
2941 SDValue &Hi) {
2942 SDLoc dl(N);
2943 // parity(HiLo) -> parity(Lo^Hi)
2944 GetExpandedInteger(N->getOperand(0), Lo, Hi);
2945 EVT NVT = Lo.getValueType();
2946 Lo =
2947 DAG.getNode(ISD::PARITY, dl, NVT, DAG.getNode(ISD::XOR, dl, NVT, Lo, Hi));
2948 Hi = DAG.getConstant(0, dl, NVT);
2949}
2950
2951void DAGTypeLegalizer::ExpandIntRes_Constant(SDNode *N,
2952 SDValue &Lo, SDValue &Hi) {
2953 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2954 unsigned NBitWidth = NVT.getSizeInBits();
2955 auto Constant = cast<ConstantSDNode>(N);
2956 const APInt &Cst = Constant->getAPIntValue();
2957 bool IsTarget = Constant->isTargetOpcode();
2958 bool IsOpaque = Constant->isOpaque();
2959 SDLoc dl(N);
2960 Lo = DAG.getConstant(Cst.trunc(NBitWidth), dl, NVT, IsTarget, IsOpaque);
2961 Hi = DAG.getConstant(Cst.lshr(NBitWidth).trunc(NBitWidth), dl, NVT, IsTarget,
2962 IsOpaque);
2963}
2964
2965void DAGTypeLegalizer::ExpandIntRes_ABS(SDNode *N, SDValue &Lo, SDValue &Hi) {
2966 SDLoc dl(N);
2967
2968 SDValue N0 = N->getOperand(0);
2969 GetExpandedInteger(N0, Lo, Hi);
2970 EVT NVT = Lo.getValueType();
2971
2972 // If we have ADDCARRY, use the expanded form of the sra+add+xor sequence we
2973 // use in LegalizeDAG. The ADD part of the expansion is based on
2974 // ExpandIntRes_ADDSUB which also uses ADDCARRY/UADDO after checking that
2975 // ADDCARRY is LegalOrCustom. Each of the pieces here can be further expanded
2976 // if needed. Shift expansion has a special case for filling with sign bits
2977 // so that we will only end up with one SRA.
2978 bool HasAddCarry = TLI.isOperationLegalOrCustom(
2979 ISD::ADDCARRY, TLI.getTypeToExpandTo(*DAG.getContext(), NVT));
2980 if (HasAddCarry) {
2981 EVT ShiftAmtTy = getShiftAmountTyForConstant(NVT, TLI, DAG);
2982 SDValue Sign =
2983 DAG.getNode(ISD::SRA, dl, NVT, Hi,
2984 DAG.getConstant(NVT.getSizeInBits() - 1, dl, ShiftAmtTy));
2985 SDVTList VTList = DAG.getVTList(NVT, getSetCCResultType(NVT));
2986 Lo = DAG.getNode(ISD::UADDO, dl, VTList, Lo, Sign);
2987 Hi = DAG.getNode(ISD::ADDCARRY, dl, VTList, Hi, Sign, Lo.getValue(1));
2988 Lo = DAG.getNode(ISD::XOR, dl, NVT, Lo, Sign);
2989 Hi = DAG.getNode(ISD::XOR, dl, NVT, Hi, Sign);
2990 return;
2991 }
2992
2993 // abs(HiLo) -> (Hi < 0 ? -HiLo : HiLo)
2994 EVT VT = N->getValueType(0);
2995 SDValue Neg = DAG.getNode(ISD::SUB, dl, VT,
2996 DAG.getConstant(0, dl, VT), N0);
2997 SDValue NegLo, NegHi;
2998 SplitInteger(Neg, NegLo, NegHi);
2999
3000 SDValue HiIsNeg = DAG.getSetCC(dl, getSetCCResultType(NVT),
3001 DAG.getConstant(0, dl, NVT), Hi, ISD::SETGT);
3002 Lo = DAG.getSelect(dl, NVT, HiIsNeg, NegLo, Lo);
3003 Hi = DAG.getSelect(dl, NVT, HiIsNeg, NegHi, Hi);
3004}
3005
3006void DAGTypeLegalizer::ExpandIntRes_CTLZ(SDNode *N,
3007 SDValue &Lo, SDValue &Hi) {
3008 SDLoc dl(N);
3009 // ctlz (HiLo) -> Hi != 0 ? ctlz(Hi) : (ctlz(Lo)+32)
3010 GetExpandedInteger(N->getOperand(0), Lo, Hi);
3011 EVT NVT = Lo.getValueType();
3012
3013 SDValue HiNotZero = DAG.getSetCC(dl, getSetCCResultType(NVT), Hi,
3014 DAG.getConstant(0, dl, NVT), ISD::SETNE);
3015
3016 SDValue LoLZ = DAG.getNode(N->getOpcode(), dl, NVT, Lo);
3017 SDValue HiLZ = DAG.getNode(ISD::CTLZ_ZERO_UNDEF, dl, NVT, Hi);
3018
3019 Lo = DAG.getSelect(dl, NVT, HiNotZero, HiLZ,
3020 DAG.getNode(ISD::ADD, dl, NVT, LoLZ,
3021 DAG.getConstant(NVT.getSizeInBits(), dl,
3022 NVT)));
3023 Hi = DAG.getConstant(0, dl, NVT);
3024}
3025
3026void DAGTypeLegalizer::ExpandIntRes_CTPOP(SDNode *N,
3027 SDValue &Lo, SDValue &Hi) {
3028 SDLoc dl(N);
3029 // ctpop(HiLo) -> ctpop(Hi)+ctpop(Lo)
3030 GetExpandedInteger(N->getOperand(0), Lo, Hi);
3031 EVT NVT = Lo.getValueType();
3032 Lo = DAG.getNode(ISD::ADD, dl, NVT, DAG.getNode(ISD::CTPOP, dl, NVT, Lo),
3033 DAG.getNode(ISD::CTPOP, dl, NVT, Hi));
3034 Hi = DAG.getConstant(0, dl, NVT);
3035}
3036
3037void DAGTypeLegalizer::ExpandIntRes_CTTZ(SDNode *N,
3038 SDValue &Lo, SDValue &Hi) {
3039 SDLoc dl(N);
3040 // cttz (HiLo) -> Lo != 0 ? cttz(Lo) : (cttz(Hi)+32)
3041 GetExpandedInteger(N->getOperand(0), Lo, Hi);
3042 EVT NVT = Lo.getValueType();
3043
3044 SDValue LoNotZero = DAG.getSetCC(dl, getSetCCResultType(NVT), Lo,
3045 DAG.getConstant(0, dl, NVT), ISD::SETNE);
3046
3047 SDValue LoLZ = DAG.getNode(ISD::CTTZ_ZERO_UNDEF, dl, NVT, Lo);
3048 SDValue HiLZ = DAG.getNode(N->getOpcode(), dl, NVT, Hi);
3049
3050 Lo = DAG.getSelect(dl, NVT, LoNotZero, LoLZ,
3051 DAG.getNode(ISD::ADD, dl, NVT, HiLZ,
3052 DAG.getConstant(NVT.getSizeInBits(), dl,
3053 NVT)));
3054 Hi = DAG.getConstant(0, dl, NVT);
3055}
3056
3057void DAGTypeLegalizer::ExpandIntRes_FLT_ROUNDS(SDNode *N, SDValue &Lo,
3058 SDValue &Hi) {
3059 SDLoc dl(N);
3060 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3061 unsigned NBitWidth = NVT.getSizeInBits();
3062
3063 EVT ShiftAmtTy = TLI.getShiftAmountTy(NVT, DAG.getDataLayout());
3064 Lo = DAG.getNode(ISD::FLT_ROUNDS_, dl, {NVT, MVT::Other}, N->getOperand(0));
3065 SDValue Chain = Lo.getValue(1);
3066 // The high part is the sign of Lo, as -1 is a valid value for FLT_ROUNDS
3067 Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
3068 DAG.getConstant(NBitWidth - 1, dl, ShiftAmtTy));
3069
3070 // Legalize the chain result - switch anything that used the old chain to
3071 // use the new one.
3072 ReplaceValueWith(SDValue(N, 1), Chain);
3073}
3074
3075void DAGTypeLegalizer::ExpandIntRes_FP_TO_SINT(SDNode *N, SDValue &Lo,
3076 SDValue &Hi) {
3077 SDLoc dl(N);
3078 EVT VT = N->getValueType(0);
3079
3080 bool IsStrict = N->isStrictFPOpcode();
3081 SDValue Chain = IsStrict ? N->getOperand(0) : SDValue();
3082 SDValue Op = N->getOperand(IsStrict ? 1 : 0);
3083 if (getTypeAction(Op.getValueType()) == TargetLowering::TypePromoteFloat)
3084 Op = GetPromotedFloat(Op);
3085
3086 if (getTypeAction(Op.getValueType()) == TargetLowering::TypeSoftPromoteHalf) {
3087 EVT NFPVT = TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType());
3088 Op = GetSoftPromotedHalf(Op);
3089 Op = DAG.getNode(ISD::FP16_TO_FP, dl, NFPVT, Op);
3090 }
3091
3092 RTLIB::Libcall LC = RTLIB::getFPTOSINT(Op.getValueType(), VT);
3093 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fp-to-sint conversion!")((void)0);
3094 TargetLowering::MakeLibCallOptions CallOptions;
3095 CallOptions.setSExt(true);
3096 std::pair<SDValue, SDValue> Tmp = TLI.makeLibCall(DAG, LC, VT, Op,
3097 CallOptions, dl, Chain);
3098 SplitInteger(Tmp.first, Lo, Hi);
3099
3100 if (IsStrict)
3101 ReplaceValueWith(SDValue(N, 1), Tmp.second);
3102}
3103
3104void DAGTypeLegalizer::ExpandIntRes_FP_TO_UINT(SDNode *N, SDValue &Lo,
3105 SDValue &Hi) {
3106 SDLoc dl(N);
3107 EVT VT = N->getValueType(0);
3108
3109 bool IsStrict = N->isStrictFPOpcode();
3110 SDValue Chain = IsStrict ? N->getOperand(0) : SDValue();
3111 SDValue Op = N->getOperand(IsStrict ? 1 : 0);
3112 if (getTypeAction(Op.getValueType()) == TargetLowering::TypePromoteFloat)
3113 Op = GetPromotedFloat(Op);
3114
3115 if (getTypeAction(Op.getValueType()) == TargetLowering::TypeSoftPromoteHalf) {
3116 EVT NFPVT = TLI.getTypeToTransformTo(*DAG.getContext(), Op.getValueType());
3117 Op = GetSoftPromotedHalf(Op);
3118 Op = DAG.getNode(ISD::FP16_TO_FP, dl, NFPVT, Op);
3119 }
3120
3121 RTLIB::Libcall LC = RTLIB::getFPTOUINT(Op.getValueType(), VT);
3122 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected fp-to-uint conversion!")((void)0);
3123 TargetLowering::MakeLibCallOptions CallOptions;
3124 std::pair<SDValue, SDValue> Tmp = TLI.makeLibCall(DAG, LC, VT, Op,
3125 CallOptions, dl, Chain);
3126 SplitInteger(Tmp.first, Lo, Hi);
3127
3128 if (IsStrict)
3129 ReplaceValueWith(SDValue(N, 1), Tmp.second);
3130}
3131
3132void DAGTypeLegalizer::ExpandIntRes_FP_TO_XINT_SAT(SDNode *N, SDValue &Lo,
3133 SDValue &Hi) {
3134 SDValue Res = TLI.expandFP_TO_INT_SAT(N, DAG);
3135 SplitInteger(Res, Lo, Hi);
3136}
3137
3138void DAGTypeLegalizer::ExpandIntRes_LLROUND_LLRINT(SDNode *N, SDValue &Lo,
3139 SDValue &Hi) {
3140 SDValue Op = N->getOperand(N->isStrictFPOpcode() ? 1 : 0);
3141
3142 assert(getTypeAction(Op.getValueType()) != TargetLowering::TypePromoteFloat &&((void)0)
3143 "Input type needs to be promoted!")((void)0);
3144
3145 EVT VT = Op.getValueType();
3146
3147 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3148 if (N->getOpcode() == ISD::LLROUND ||
3149 N->getOpcode() == ISD::STRICT_LLROUND) {
3150 if (VT == MVT::f32)
3151 LC = RTLIB::LLROUND_F32;
3152 else if (VT == MVT::f64)
3153 LC = RTLIB::LLROUND_F64;
3154 else if (VT == MVT::f80)
3155 LC = RTLIB::LLROUND_F80;
3156 else if (VT == MVT::f128)
3157 LC = RTLIB::LLROUND_F128;
3158 else if (VT == MVT::ppcf128)
3159 LC = RTLIB::LLROUND_PPCF128;
3160 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected llround input type!")((void)0);
3161 } else if (N->getOpcode() == ISD::LLRINT ||
3162 N->getOpcode() == ISD::STRICT_LLRINT) {
3163 if (VT == MVT::f32)
3164 LC = RTLIB::LLRINT_F32;
3165 else if (VT == MVT::f64)
3166 LC = RTLIB::LLRINT_F64;
3167 else if (VT == MVT::f80)
3168 LC = RTLIB::LLRINT_F80;
3169 else if (VT == MVT::f128)
3170 LC = RTLIB::LLRINT_F128;
3171 else if (VT == MVT::ppcf128)
3172 LC = RTLIB::LLRINT_PPCF128;
3173 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpected llrint input type!")((void)0);
3174 } else
3175 llvm_unreachable("Unexpected opcode!")__builtin_unreachable();
3176
3177 SDLoc dl(N);
3178 EVT RetVT = N->getValueType(0);
3179 SDValue Chain = N->isStrictFPOpcode() ? N->getOperand(0) : SDValue();
3180
3181 TargetLowering::MakeLibCallOptions CallOptions;
3182 CallOptions.setSExt(true);
3183 std::pair<SDValue, SDValue> Tmp = TLI.makeLibCall(DAG, LC, RetVT,
3184 Op, CallOptions, dl,
3185 Chain);
3186 SplitInteger(Tmp.first, Lo, Hi);
3187
3188 if (N->isStrictFPOpcode())
3189 ReplaceValueWith(SDValue(N, 1), Tmp.second);
3190}
3191
3192void DAGTypeLegalizer::ExpandIntRes_LOAD(LoadSDNode *N,
3193 SDValue &Lo, SDValue &Hi) {
3194 if (N->isAtomic()) {
3195 // It's typical to have larger CAS than atomic load instructions.
3196 SDLoc dl(N);
3197 EVT VT = N->getMemoryVT();
3198 SDVTList VTs = DAG.getVTList(VT, MVT::i1, MVT::Other);
3199 SDValue Zero = DAG.getConstant(0, dl, VT);
3200 SDValue Swap = DAG.getAtomicCmpSwap(
3201 ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, dl,
3202 VT, VTs, N->getOperand(0),
3203 N->getOperand(1), Zero, Zero, N->getMemOperand());
3204 ReplaceValueWith(SDValue(N, 0), Swap.getValue(0));
3205 ReplaceValueWith(SDValue(N, 1), Swap.getValue(2));
3206 return;
3207 }
3208
3209 if (ISD::isNormalLoad(N)) {
3210 ExpandRes_NormalLoad(N, Lo, Hi);
3211 return;
3212 }
3213
3214 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!")((void)0);
3215
3216 EVT VT = N->getValueType(0);
3217 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
3218 SDValue Ch = N->getChain();
3219 SDValue Ptr = N->getBasePtr();
3220 ISD::LoadExtType ExtType = N->getExtensionType();
3221 MachineMemOperand::Flags MMOFlags = N->getMemOperand()->getFlags();
3222 AAMDNodes AAInfo = N->getAAInfo();
3223 SDLoc dl(N);
3224
3225 assert(NVT.isByteSized() && "Expanded type not byte sized!")((void)0);
3226
3227 if (N->getMemoryVT().bitsLE(NVT)) {
3228 EVT MemVT = N->getMemoryVT();
3229
3230 Lo = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getPointerInfo(), MemVT,
3231 N->getOriginalAlign(), MMOFlags, AAInfo);
3232
3233 // Remember the chain.
3234 Ch = Lo.getValue(1);
3235
3236 if (ExtType == ISD::SEXTLOAD) {
3237 // The high part is obtained by SRA'ing all but one of the bits of the
3238 // lo part.
3239 unsigned LoSize = Lo.getValueSizeInBits();
3240 Hi = DAG.getNode(ISD::SRA, dl, NVT, Lo,
3241 DAG.getConstant(LoSize - 1, dl,
3242 TLI.getPointerTy(DAG.getDataLayout())));
3243 } else if (ExtType == ISD::ZEXTLOAD) {
3244 // The high part is just a zero.
3245 Hi = DAG.getConstant(0, dl, NVT);
3246 } else {
3247 assert(ExtType == ISD::EXTLOAD && "Unknown extload!")((void)0);
3248 // The high part is undefined.
3249 Hi = DAG.getUNDEF(NVT);
3250 }
3251 } else if (DAG.getDataLayout().isLittleEndian()) {
3252 // Little-endian - low bits are at low addresses.
3253 Lo = DAG.getLoad(NVT, dl, Ch, Ptr, N->getPointerInfo(),
3254 N->getOriginalAlign(), MMOFlags, AAInfo);
3255
3256 unsigned ExcessBits =
3257 N->getMemoryVT().getSizeInBits() - NVT.getSizeInBits();
3258 EVT NEVT = EVT::getIntegerVT(*DAG.getContext(), ExcessBits);
3259
3260 // Increment the pointer to the other half.
3261 unsigned IncrementSize = NVT.getSizeInBits()/8;
3262 Ptr = DAG.getMemBasePlusOffset(Ptr, TypeSize::Fixed(IncrementSize), dl);
3263 Hi = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr,
3264 N->getPointerInfo().getWithOffset(IncrementSize), NEVT,
3265 N->getOriginalAlign(), MMOFlags, AAInfo);
3266
3267 // Build a factor node to remember that this load is independent of the
3268 // other one.
3269 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
3270 Hi.getValue(1));
3271 } else {
3272 // Big-endian - high bits are at low addresses. Favor aligned loads at
3273 // the cost of some bit-fiddling.
3274 EVT MemVT = N->getMemoryVT();
3275 unsigned EBytes = MemVT.getStoreSize();
3276 unsigned IncrementSize = NVT.getSizeInBits()/8;
3277 unsigned ExcessBits = (EBytes - IncrementSize)*8;
3278
3279 // Load both the high bits and maybe some of the low bits.
3280 Hi = DAG.getExtLoad(ExtType, dl, NVT, Ch, Ptr, N->getPointerInfo(),
3281 EVT::getIntegerVT(*DAG.getContext(),
3282 MemVT.getSizeInBits() - ExcessBits),
3283 N->getOriginalAlign(), MMOFlags, AAInfo);
3284
3285 // Increment the pointer to the other half.
3286 Ptr = DAG.getMemBasePlusOffset(Ptr, TypeSize::Fixed(IncrementSize), dl);
3287 // Load the rest of the low bits.
3288 Lo = DAG.getExtLoad(ISD::ZEXTLOAD, dl, NVT, Ch, Ptr,
3289 N->getPointerInfo().getWithOffset(IncrementSize),
3290 EVT::getIntegerVT(*DAG.getContext(), ExcessBits),
3291 N->getOriginalAlign(), MMOFlags, AAInfo);
3292
3293 // Build a factor node to remember that this load is independent of the
3294 // other one.
3295 Ch = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo.getValue(1),
3296 Hi.getValue(1));
3297
3298 if (ExcessBits < NVT.getSizeInBits()) {
3299 // Transfer low bits from the bottom of Hi to the top of Lo.
3300 Lo = DAG.getNode(
3301 ISD::OR, dl, NVT, Lo,
3302 DAG.getNode(ISD::SHL, dl, NVT, Hi,
3303 DAG.getConstant(ExcessBits, dl,
3304 TLI.getPointerTy(DAG.getDataLayout()))));
3305 // Move high bits to the right position in Hi.
3306 Hi = DAG.getNode(ExtType == ISD::SEXTLOAD ? ISD::SRA : ISD::SRL, dl, NVT,
3307 Hi,
3308 DAG.getConstant(NVT.getSizeInBits() - ExcessBits, dl,
3309 TLI.getPointerTy(DAG.getDataLayout())));
3310 }
3311 }
3312
3313 // Legalize the chain result - switch anything that used the old chain to
3314 // use the new one.
3315 ReplaceValueWith(SDValue(N, 1), Ch);
3316}
3317
3318void DAGTypeLegalizer::ExpandIntRes_Logical(SDNode *N,
3319 SDValue &Lo, SDValue &Hi) {
3320 SDLoc dl(N);
3321 SDValue LL, LH, RL, RH;
3322 GetExpandedInteger(N->getOperand(0), LL, LH);
3323 GetExpandedInteger(N->getOperand(1), RL, RH);
3324 Lo = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LL, RL);
3325 Hi = DAG.getNode(N->getOpcode(), dl, LL.getValueType(), LH, RH);
3326}
3327
3328void DAGTypeLegalizer::ExpandIntRes_MUL(SDNode *N,
3329 SDValue &Lo, SDValue &Hi) {
3330 EVT VT = N->getValueType(0);
3331 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
3332 SDLoc dl(N);
3333
3334 SDValue LL, LH, RL, RH;
3335 GetExpandedInteger(N->getOperand(0), LL, LH);
3336 GetExpandedInteger(N->getOperand(1), RL, RH);
3337
3338 if (TLI.expandMUL(N, Lo, Hi, NVT, DAG,
3339 TargetLowering::MulExpansionKind::OnlyLegalOrCustom,
3340 LL, LH, RL, RH))
3341 return;
3342
3343 // If nothing else, we can make a libcall.
3344 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3345 if (VT == MVT::i16)
3346 LC = RTLIB::MUL_I16;
3347 else if (VT == MVT::i32)
3348 LC = RTLIB::MUL_I32;
3349 else if (VT == MVT::i64)
3350 LC = RTLIB::MUL_I64;
3351 else if (VT == MVT::i128)
3352 LC = RTLIB::MUL_I128;
3353
3354 if (LC == RTLIB::UNKNOWN_LIBCALL || !TLI.getLibcallName(LC)) {
3355 // We'll expand the multiplication by brute force because we have no other
3356 // options. This is a trivially-generalized version of the code from
3357 // Hacker's Delight (itself derived from Knuth's Algorithm M from section
3358 // 4.3.1).
3359 unsigned Bits = NVT.getSizeInBits();
3360 unsigned HalfBits = Bits >> 1;
3361 SDValue Mask = DAG.getConstant(APInt::getLowBitsSet(Bits, HalfBits), dl,
3362 NVT);
3363 SDValue LLL = DAG.getNode(ISD::AND, dl, NVT, LL, Mask);
3364 SDValue RLL = DAG.getNode(ISD::AND, dl, NVT, RL, Mask);
3365
3366 SDValue T = DAG.getNode(ISD::MUL, dl, NVT, LLL, RLL);
3367 SDValue TL = DAG.getNode(ISD::AND, dl, NVT, T, Mask);
3368
3369 EVT ShiftAmtTy = TLI.getShiftAmountTy(NVT, DAG.getDataLayout());
3370 if (APInt::getMaxValue(ShiftAmtTy.getSizeInBits()).ult(HalfBits)) {
3371 // The type from TLI is too small to fit the shift amount we want.
3372 // Override it with i32. The shift will have to be legalized.
3373 ShiftAmtTy = MVT::i32;
3374 }
3375 SDValue Shift = DAG.getConstant(HalfBits, dl, ShiftAmtTy);
3376 SDValue TH = DAG.getNode(ISD::SRL, dl, NVT, T, Shift);
3377 SDValue LLH = DAG.getNode(ISD::SRL, dl, NVT, LL, Shift);
3378 SDValue RLH = DAG.getNode(ISD::SRL, dl, NVT, RL, Shift);
3379
3380 SDValue U = DAG.getNode(ISD::ADD, dl, NVT,
3381 DAG.getNode(ISD::MUL, dl, NVT, LLH, RLL), TH);
3382 SDValue UL = DAG.getNode(ISD::AND, dl, NVT, U, Mask);
3383 SDValue UH = DAG.getNode(ISD::SRL, dl, NVT, U, Shift);
3384
3385 SDValue V = DAG.getNode(ISD::ADD, dl, NVT,
3386 DAG.getNode(ISD::MUL, dl, NVT, LLL, RLH), UL);
3387 SDValue VH = DAG.getNode(ISD::SRL, dl, NVT, V, Shift);
3388
3389 SDValue W = DAG.getNode(ISD::ADD, dl, NVT,
3390 DAG.getNode(ISD::MUL, dl, NVT, LLH, RLH),
3391 DAG.getNode(ISD::ADD, dl, NVT, UH, VH));
3392 Lo = DAG.getNode(ISD::ADD, dl, NVT, TL,
3393 DAG.getNode(ISD::SHL, dl, NVT, V, Shift));
3394
3395 Hi = DAG.getNode(ISD::ADD, dl, NVT, W,
3396 DAG.getNode(ISD::ADD, dl, NVT,
3397 DAG.getNode(ISD::MUL, dl, NVT, RH, LL),
3398 DAG.getNode(ISD::MUL, dl, NVT, RL, LH)));
3399 return;
3400 }
3401
3402 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
3403 TargetLowering::MakeLibCallOptions CallOptions;
3404 CallOptions.setSExt(true);
3405 SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, CallOptions, dl).first,
3406 Lo, Hi);
3407}
3408
3409void DAGTypeLegalizer::ExpandIntRes_READCYCLECOUNTER(SDNode *N, SDValue &Lo,
3410 SDValue &Hi) {
3411 SDLoc DL(N);
3412 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3413 SDVTList VTs = DAG.getVTList(NVT, NVT, MVT::Other);
3414 SDValue R = DAG.getNode(N->getOpcode(), DL, VTs, N->getOperand(0));
3415 Lo = R.getValue(0);
3416 Hi = R.getValue(1);
3417 ReplaceValueWith(SDValue(N, 1), R.getValue(2));
3418}
3419
3420void DAGTypeLegalizer::ExpandIntRes_ADDSUBSAT(SDNode *N, SDValue &Lo,
3421 SDValue &Hi) {
3422 SDValue Result = TLI.expandAddSubSat(N, DAG);
3423 SplitInteger(Result, Lo, Hi);
3424}
3425
3426void DAGTypeLegalizer::ExpandIntRes_SHLSAT(SDNode *N, SDValue &Lo,
3427 SDValue &Hi) {
3428 SDValue Result = TLI.expandShlSat(N, DAG);
3429 SplitInteger(Result, Lo, Hi);
3430}
3431
3432/// This performs an expansion of the integer result for a fixed point
3433/// multiplication. The default expansion performs rounding down towards
3434/// negative infinity, though targets that do care about rounding should specify
3435/// a target hook for rounding and provide their own expansion or lowering of
3436/// fixed point multiplication to be consistent with rounding.
3437void DAGTypeLegalizer::ExpandIntRes_MULFIX(SDNode *N, SDValue &Lo,
3438 SDValue &Hi) {
3439 SDLoc dl(N);
3440 EVT VT = N->getValueType(0);
3441 unsigned VTSize = VT.getScalarSizeInBits();
3442 SDValue LHS = N->getOperand(0);
3443 SDValue RHS = N->getOperand(1);
3444 uint64_t Scale = N->getConstantOperandVal(2);
3445 bool Saturating = (N->getOpcode() == ISD::SMULFIXSAT ||
3446 N->getOpcode() == ISD::UMULFIXSAT);
3447 bool Signed = (N->getOpcode() == ISD::SMULFIX ||
3448 N->getOpcode() == ISD::SMULFIXSAT);
3449
3450 // Handle special case when scale is equal to zero.
3451 if (!Scale) {
3452 SDValue Result;
3453 if (!Saturating) {
3454 Result = DAG.getNode(ISD::MUL, dl, VT, LHS, RHS);
3455 } else {
3456 EVT BoolVT = getSetCCResultType(VT);
3457 unsigned MulOp = Signed ? ISD::SMULO : ISD::UMULO;
3458 Result = DAG.getNode(MulOp, dl, DAG.getVTList(VT, BoolVT), LHS, RHS);
3459 SDValue Product = Result.getValue(0);
3460 SDValue Overflow = Result.getValue(1);
3461 if (Signed) {
3462 APInt MinVal = APInt::getSignedMinValue(VTSize);
3463 APInt MaxVal = APInt::getSignedMaxValue(VTSize);
3464 SDValue SatMin = DAG.getConstant(MinVal, dl, VT);
3465 SDValue SatMax = DAG.getConstant(MaxVal, dl, VT);
3466 SDValue Zero = DAG.getConstant(0, dl, VT);
3467 // Xor the inputs, if resulting sign bit is 0 the product will be
3468 // positive, else negative.
3469 SDValue Xor = DAG.getNode(ISD::XOR, dl, VT, LHS, RHS);
3470 SDValue ProdNeg = DAG.getSetCC(dl, BoolVT, Xor, Zero, ISD::SETLT);
3471 Result = DAG.getSelect(dl, VT, ProdNeg, SatMin, SatMax);
3472 Result = DAG.getSelect(dl, VT, Overflow, Result, Product);
3473 } else {
3474 // For unsigned multiplication, we only need to check the max since we
3475 // can't really overflow towards zero.
3476 APInt MaxVal = APInt::getMaxValue(VTSize);
3477 SDValue SatMax = DAG.getConstant(MaxVal, dl, VT);
3478 Result = DAG.getSelect(dl, VT, Overflow, SatMax, Product);
3479 }
3480 }
3481 SplitInteger(Result, Lo, Hi);
3482 return;
3483 }
3484
3485 // For SMULFIX[SAT] we only expect to find Scale<VTSize, but this assert will
3486 // cover for unhandled cases below, while still being valid for UMULFIX[SAT].
3487 assert(Scale <= VTSize && "Scale can't be larger than the value type size.")((void)0);
3488
3489 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
3490 SDValue LL, LH, RL, RH;
3491 GetExpandedInteger(LHS, LL, LH);
3492 GetExpandedInteger(RHS, RL, RH);
3493 SmallVector<SDValue, 4> Result;
3494
3495 unsigned LoHiOp = Signed ? ISD::SMUL_LOHI : ISD::UMUL_LOHI;
3496 if (!TLI.expandMUL_LOHI(LoHiOp, VT, dl, LHS, RHS, Result, NVT, DAG,
3497 TargetLowering::MulExpansionKind::OnlyLegalOrCustom,
3498 LL, LH, RL, RH)) {
3499 report_fatal_error("Unable to expand MUL_FIX using MUL_LOHI.");
3500 return;
3501 }
3502
3503 unsigned NVTSize = NVT.getScalarSizeInBits();
3504 assert((VTSize == NVTSize * 2) && "Expected the new value type to be half "((void)0)
3505 "the size of the current value type")((void)0);
3506 EVT ShiftTy = TLI.getShiftAmountTy(NVT, DAG.getDataLayout());
3507
3508 // After getting the multiplication result in 4 parts, we need to perform a
3509 // shift right by the amount of the scale to get the result in that scale.
3510 //
3511 // Let's say we multiply 2 64 bit numbers. The resulting value can be held in
3512 // 128 bits that are cut into 4 32-bit parts:
3513 //
3514 // HH HL LH LL
3515 // |---32---|---32---|---32---|---32---|
3516 // 128 96 64 32 0
3517 //
3518 // |------VTSize-----|
3519 //
3520 // |NVTSize-|
3521 //
3522 // The resulting Lo and Hi would normally be in LL and LH after the shift. But
3523 // to avoid unneccessary shifting of all 4 parts, we can adjust the shift
3524 // amount and get Lo and Hi using two funnel shifts. Or for the special case
3525 // when Scale is a multiple of NVTSize we can just pick the result without
3526 // shifting.
3527 uint64_t Part0 = Scale / NVTSize; // Part holding lowest bit needed.
3528 if (Scale % NVTSize) {
3529 SDValue ShiftAmount = DAG.getConstant(Scale % NVTSize, dl, ShiftTy);
3530 Lo = DAG.getNode(ISD::FSHR, dl, NVT, Result[Part0 + 1], Result[Part0],
3531 ShiftAmount);
3532 Hi = DAG.getNode(ISD::FSHR, dl, NVT, Result[Part0 + 2], Result[Part0 + 1],
3533 ShiftAmount);
3534 } else {
3535 Lo = Result[Part0];
3536 Hi = Result[Part0 + 1];
3537 }
3538
3539 // Unless saturation is requested we are done. The result is in <Hi,Lo>.
3540 if (!Saturating)
3541 return;
3542
3543 // Can not overflow when there is no integer part.
3544 if (Scale == VTSize)
3545 return;
3546
3547 // To handle saturation we must check for overflow in the multiplication.
3548 //
3549 // Unsigned overflow happened if the upper (VTSize - Scale) bits (of Result)
3550 // aren't all zeroes.
3551 //
3552 // Signed overflow happened if the upper (VTSize - Scale + 1) bits (of Result)
3553 // aren't all ones or all zeroes.
3554 //
3555 // We cannot overflow past HH when multiplying 2 ints of size VTSize, so the
3556 // highest bit of HH determines saturation direction in the event of signed
3557 // saturation.
3558
3559 SDValue ResultHL = Result[2];
3560 SDValue ResultHH = Result[3];
3561
3562 SDValue SatMax, SatMin;
3563 SDValue NVTZero = DAG.getConstant(0, dl, NVT);
3564 SDValue NVTNeg1 = DAG.getConstant(-1, dl, NVT);
3565 EVT BoolNVT = getSetCCResultType(NVT);
3566
3567 if (!Signed) {
3568 if (Scale < NVTSize) {
3569 // Overflow happened if ((HH | (HL >> Scale)) != 0).
3570 SDValue HLAdjusted = DAG.getNode(ISD::SRL, dl, NVT, ResultHL,
3571 DAG.getConstant(Scale, dl, ShiftTy));
3572 SDValue Tmp = DAG.getNode(ISD::OR, dl, NVT, HLAdjusted, ResultHH);
3573 SatMax = DAG.getSetCC(dl, BoolNVT, Tmp, NVTZero, ISD::SETNE);
3574 } else if (Scale == NVTSize) {
3575 // Overflow happened if (HH != 0).
3576 SatMax = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTZero, ISD::SETNE);
3577 } else if (Scale < VTSize) {
3578 // Overflow happened if ((HH >> (Scale - NVTSize)) != 0).
3579 SDValue HLAdjusted = DAG.getNode(ISD::SRL, dl, NVT, ResultHL,
3580 DAG.getConstant(Scale - NVTSize, dl,
3581 ShiftTy));
3582 SatMax = DAG.getSetCC(dl, BoolNVT, HLAdjusted, NVTZero, ISD::SETNE);
3583 } else
3584 llvm_unreachable("Scale must be less or equal to VTSize for UMULFIXSAT"__builtin_unreachable()
3585 "(and saturation can't happen with Scale==VTSize).")__builtin_unreachable();
3586
3587 Hi = DAG.getSelect(dl, NVT, SatMax, NVTNeg1, Hi);
3588 Lo = DAG.getSelect(dl, NVT, SatMax, NVTNeg1, Lo);
3589 return;
3590 }
3591
3592 if (Scale < NVTSize) {
3593 // The number of overflow bits we can check are VTSize - Scale + 1 (we
3594 // include the sign bit). If these top bits are > 0, then we overflowed past
3595 // the max value. If these top bits are < -1, then we overflowed past the
3596 // min value. Otherwise, we did not overflow.
3597 unsigned OverflowBits = VTSize - Scale + 1;
3598 assert(OverflowBits <= VTSize && OverflowBits > NVTSize &&((void)0)
3599 "Extent of overflow bits must start within HL")((void)0);
3600 SDValue HLHiMask = DAG.getConstant(
3601 APInt::getHighBitsSet(NVTSize, OverflowBits - NVTSize), dl, NVT);
3602 SDValue HLLoMask = DAG.getConstant(
3603 APInt::getLowBitsSet(NVTSize, VTSize - OverflowBits), dl, NVT);
3604 // We overflow max if HH > 0 or (HH == 0 && HL > HLLoMask).
3605 SDValue HHGT0 = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTZero, ISD::SETGT);
3606 SDValue HHEQ0 = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTZero, ISD::SETEQ);
3607 SDValue HLUGT = DAG.getSetCC(dl, BoolNVT, ResultHL, HLLoMask, ISD::SETUGT);
3608 SatMax = DAG.getNode(ISD::OR, dl, BoolNVT, HHGT0,
3609 DAG.getNode(ISD::AND, dl, BoolNVT, HHEQ0, HLUGT));
3610 // We overflow min if HH < -1 or (HH == -1 && HL < HLHiMask).
3611 SDValue HHLT = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTNeg1, ISD::SETLT);
3612 SDValue HHEQ = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTNeg1, ISD::SETEQ);
3613 SDValue HLULT = DAG.getSetCC(dl, BoolNVT, ResultHL, HLHiMask, ISD::SETULT);
3614 SatMin = DAG.getNode(ISD::OR, dl, BoolNVT, HHLT,
3615 DAG.getNode(ISD::AND, dl, BoolNVT, HHEQ, HLULT));
3616 } else if (Scale == NVTSize) {
3617 // We overflow max if HH > 0 or (HH == 0 && HL sign bit is 1).
3618 SDValue HHGT0 = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTZero, ISD::SETGT);
3619 SDValue HHEQ0 = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTZero, ISD::SETEQ);
3620 SDValue HLNeg = DAG.getSetCC(dl, BoolNVT, ResultHL, NVTZero, ISD::SETLT);
3621 SatMax = DAG.getNode(ISD::OR, dl, BoolNVT, HHGT0,
3622 DAG.getNode(ISD::AND, dl, BoolNVT, HHEQ0, HLNeg));
3623 // We overflow min if HH < -1 or (HH == -1 && HL sign bit is 0).
3624 SDValue HHLT = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTNeg1, ISD::SETLT);
3625 SDValue HHEQ = DAG.getSetCC(dl, BoolNVT, ResultHH, NVTNeg1, ISD::SETEQ);
3626 SDValue HLPos = DAG.getSetCC(dl, BoolNVT, ResultHL, NVTZero, ISD::SETGE);
3627 SatMin = DAG.getNode(ISD::OR, dl, BoolNVT, HHLT,
3628 DAG.getNode(ISD::AND, dl, BoolNVT, HHEQ, HLPos));
3629 } else if (Scale < VTSize) {
3630 // This is similar to the case when we saturate if Scale < NVTSize, but we
3631 // only need to check HH.
3632 unsigned OverflowBits = VTSize - Scale + 1;
3633 SDValue HHHiMask = DAG.getConstant(
3634 APInt::getHighBitsSet(NVTSize, OverflowBits), dl, NVT);
3635 SDValue HHLoMask = DAG.getConstant(
3636 APInt::getLowBitsSet(NVTSize, NVTSize - OverflowBits), dl, NVT);
3637 SatMax = DAG.getSetCC(dl, BoolNVT, ResultHH, HHLoMask, ISD::SETGT);
3638 SatMin = DAG.getSetCC(dl, BoolNVT, ResultHH, HHHiMask, ISD::SETLT);
3639 } else
3640 llvm_unreachable("Illegal scale for signed fixed point mul.")__builtin_unreachable();
3641
3642 // Saturate to signed maximum.
3643 APInt MaxHi = APInt::getSignedMaxValue(NVTSize);
3644 APInt MaxLo = APInt::getAllOnesValue(NVTSize);
3645 Hi = DAG.getSelect(dl, NVT, SatMax, DAG.getConstant(MaxHi, dl, NVT), Hi);
3646 Lo = DAG.getSelect(dl, NVT, SatMax, DAG.getConstant(MaxLo, dl, NVT), Lo);
3647 // Saturate to signed minimum.
3648 APInt MinHi = APInt::getSignedMinValue(NVTSize);
3649 Hi = DAG.getSelect(dl, NVT, SatMin, DAG.getConstant(MinHi, dl, NVT), Hi);
3650 Lo = DAG.getSelect(dl, NVT, SatMin, NVTZero, Lo);
3651}
3652
3653void DAGTypeLegalizer::ExpandIntRes_DIVFIX(SDNode *N, SDValue &Lo,
3654 SDValue &Hi) {
3655 SDLoc dl(N);
3656 // Try expanding in the existing type first.
3657 SDValue Res = TLI.expandFixedPointDiv(N->getOpcode(), dl, N->getOperand(0),
3658 N->getOperand(1),
3659 N->getConstantOperandVal(2), DAG);
3660
3661 if (!Res)
3662 Res = earlyExpandDIVFIX(N, N->getOperand(0), N->getOperand(1),
3663 N->getConstantOperandVal(2), TLI, DAG);
3664 SplitInteger(Res, Lo, Hi);
3665}
3666
3667void DAGTypeLegalizer::ExpandIntRes_SADDSUBO(SDNode *Node,
3668 SDValue &Lo, SDValue &Hi) {
3669 assert((Node->getOpcode() == ISD::SADDO || Node->getOpcode() == ISD::SSUBO) &&((void)0)
3670 "Node has unexpected Opcode")((void)0);
3671 SDValue LHS = Node->getOperand(0);
3672 SDValue RHS = Node->getOperand(1);
3673 SDLoc dl(Node);
3674
3675 SDValue Ovf;
3676
3677 bool IsAdd = Node->getOpcode() == ISD::SADDO;
3678 unsigned CarryOp = IsAdd ? ISD::SADDO_CARRY : ISD::SSUBO_CARRY;
3679
3680 bool HasCarryOp = TLI.isOperationLegalOrCustom(
3681 CarryOp, TLI.getTypeToExpandTo(*DAG.getContext(), LHS.getValueType()));
3682
3683 if (HasCarryOp) {
3684 // Expand the subcomponents.
3685 SDValue LHSL, LHSH, RHSL, RHSH;
3686 GetExpandedInteger(LHS, LHSL, LHSH);
3687 GetExpandedInteger(RHS, RHSL, RHSH);
3688 SDVTList VTList = DAG.getVTList(LHSL.getValueType(), Node->getValueType(1));
3689
3690 Lo = DAG.getNode(IsAdd ? ISD::UADDO : ISD::USUBO, dl, VTList, {LHSL, RHSL});
3691 Hi = DAG.getNode(CarryOp, dl, VTList, { LHSH, RHSH, Lo.getValue(1) });
3692
3693 Ovf = Hi.getValue(1);
3694 } else {
3695 // Expand the result by simply replacing it with the equivalent
3696 // non-overflow-checking operation.
3697 SDValue Sum = DAG.getNode(Node->getOpcode() == ISD::SADDO ?
3698 ISD::ADD : ISD::SUB, dl, LHS.getValueType(),
3699 LHS, RHS);
3700 SplitInteger(Sum, Lo, Hi);
3701
3702 // Compute the overflow.
3703 //
3704 // LHSSign -> LHS < 0
3705 // RHSSign -> RHS < 0
3706 // SumSign -> Sum < 0
3707 //
3708 // Add:
3709 // Overflow -> (LHSSign == RHSSign) && (LHSSign != SumSign)
3710 // Sub:
3711 // Overflow -> (LHSSign != RHSSign) && (LHSSign != SumSign)
3712 //
3713 // To get better codegen we can rewrite this by doing bitwise math on
3714 // the integers and extract the final sign bit at the end. So the
3715 // above becomes:
3716 //
3717 // Add:
3718 // Overflow -> (~(LHS ^ RHS) & (LHS ^ Sum)) < 0
3719 // Sub:
3720 // Overflow -> ((LHS ^ RHS) & (LHS ^ Sum)) < 0
3721 //
3722 // NOTE: This is different than the expansion we do in expandSADDSUBO
3723 // because it is more costly to determine the RHS is > 0 for SSUBO with the
3724 // integers split.
3725 EVT VT = LHS.getValueType();
3726 SDValue SignsMatch = DAG.getNode(ISD::XOR, dl, VT, LHS, RHS);
3727 if (IsAdd)
3728 SignsMatch = DAG.getNOT(dl, SignsMatch, VT);
3729
3730 SDValue SumSignNE = DAG.getNode(ISD::XOR, dl, VT, LHS, Sum);
3731 Ovf = DAG.getNode(ISD::AND, dl, VT, SignsMatch, SumSignNE);
3732 EVT OType = Node->getValueType(1);
3733 Ovf = DAG.getSetCC(dl, OType, Ovf, DAG.getConstant(0, dl, VT), ISD::SETLT);
3734 }
3735
3736 // Use the calculated overflow everywhere.
3737 ReplaceValueWith(SDValue(Node, 1), Ovf);
3738}
3739
3740void DAGTypeLegalizer::ExpandIntRes_SDIV(SDNode *N,
3741 SDValue &Lo, SDValue &Hi) {
3742 EVT VT = N->getValueType(0);
3743 SDLoc dl(N);
3744 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
3745
3746 if (TLI.getOperationAction(ISD::SDIVREM, VT) == TargetLowering::Custom) {
3747 SDValue Res = DAG.getNode(ISD::SDIVREM, dl, DAG.getVTList(VT, VT), Ops);
3748 SplitInteger(Res.getValue(0), Lo, Hi);
3749 return;
3750 }
3751
3752 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3753 if (VT == MVT::i16)
3754 LC = RTLIB::SDIV_I16;
3755 else if (VT == MVT::i32)
3756 LC = RTLIB::SDIV_I32;
3757 else if (VT == MVT::i64)
3758 LC = RTLIB::SDIV_I64;
3759 else if (VT == MVT::i128)
3760 LC = RTLIB::SDIV_I128;
3761 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SDIV!")((void)0);
3762
3763 TargetLowering::MakeLibCallOptions CallOptions;
3764 CallOptions.setSExt(true);
3765 SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, CallOptions, dl).first, Lo, Hi);
3766}
3767
3768void DAGTypeLegalizer::ExpandIntRes_Shift(SDNode *N,
3769 SDValue &Lo, SDValue &Hi) {
3770 EVT VT = N->getValueType(0);
3771 SDLoc dl(N);
3772
3773 // If we can emit an efficient shift operation, do so now. Check to see if
3774 // the RHS is a constant.
3775 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N->getOperand(1)))
6
←
Assuming 'CN' is null
→
7
←
Taking false branch
→
3776 return ExpandShiftByConstant(N, CN->getAPIntValue(), Lo, Hi);
3777
3778 // If we can determine that the high bit of the shift is zero or one, even if
3779 // the low bits are variable, emit this shift in an optimized form.
3780 if (ExpandShiftWithKnownAmountBit(N, Lo, Hi))
8
←
Calling 'DAGTypeLegalizer::ExpandShiftWithKnownAmountBit'
→
3781 return;
3782
3783 // If this target supports shift_PARTS, use it. First, map to the _PARTS opc.
3784 unsigned PartsOpc;
3785 if (N->getOpcode() == ISD::SHL) {
3786 PartsOpc = ISD::SHL_PARTS;
3787 } else if (N->getOpcode() == ISD::SRL) {
3788 PartsOpc = ISD::SRL_PARTS;
3789 } else {
3790 assert(N->getOpcode() == ISD::SRA && "Unknown shift!")((void)0);
3791 PartsOpc = ISD::SRA_PARTS;
3792 }
3793
3794 // Next check to see if the target supports this SHL_PARTS operation or if it
3795 // will custom expand it. Don't lower this to SHL_PARTS when we optimise for
3796 // size, but create a libcall instead.
3797 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
3798 TargetLowering::LegalizeAction Action = TLI.getOperationAction(PartsOpc, NVT);
3799 const bool LegalOrCustom =
3800 (Action == TargetLowering::Legal && TLI.isTypeLegal(NVT)) ||
3801 Action == TargetLowering::Custom;
3802
3803 if (LegalOrCustom && TLI.shouldExpandShift(DAG, N)) {
3804 // Expand the subcomponents.
3805 SDValue LHSL, LHSH;
3806 GetExpandedInteger(N->getOperand(0), LHSL, LHSH);
3807 EVT VT = LHSL.getValueType();
3808
3809 // If the shift amount operand is coming from a vector legalization it may
3810 // have an illegal type. Fix that first by casting the operand, otherwise
3811 // the new SHL_PARTS operation would need further legalization.
3812 SDValue ShiftOp = N->getOperand(1);
3813 EVT ShiftTy = TLI.getShiftAmountTy(VT, DAG.getDataLayout());
3814 assert(ShiftTy.getScalarSizeInBits() >=((void)0)
3815 Log2_32_Ceil(VT.getScalarSizeInBits()) &&((void)0)
3816 "ShiftAmountTy is too small to cover the range of this type!")((void)0);
3817 if (ShiftOp.getValueType() != ShiftTy)
3818 ShiftOp = DAG.getZExtOrTrunc(ShiftOp, dl, ShiftTy);
3819
3820 SDValue Ops[] = { LHSL, LHSH, ShiftOp };
3821 Lo = DAG.getNode(PartsOpc, dl, DAG.getVTList(VT, VT), Ops);
3822 Hi = Lo.getValue(1);
3823 return;
3824 }
3825
3826 // Otherwise, emit a libcall.
3827 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3828 bool isSigned;
3829 if (N->getOpcode() == ISD::SHL) {
3830 isSigned = false; /*sign irrelevant*/
3831 if (VT == MVT::i16)
3832 LC = RTLIB::SHL_I16;
3833 else if (VT == MVT::i32)
3834 LC = RTLIB::SHL_I32;
3835 else if (VT == MVT::i64)
3836 LC = RTLIB::SHL_I64;
3837 else if (VT == MVT::i128)
3838 LC = RTLIB::SHL_I128;
3839 } else if (N->getOpcode() == ISD::SRL) {
3840 isSigned = false;
3841 if (VT == MVT::i16)
3842 LC = RTLIB::SRL_I16;
3843 else if (VT == MVT::i32)
3844 LC = RTLIB::SRL_I32;
3845 else if (VT == MVT::i64)
3846 LC = RTLIB::SRL_I64;
3847 else if (VT == MVT::i128)
3848 LC = RTLIB::SRL_I128;
3849 } else {
3850 assert(N->getOpcode() == ISD::SRA && "Unknown shift!")((void)0);
3851 isSigned = true;
3852 if (VT == MVT::i16)
3853 LC = RTLIB::SRA_I16;
3854 else if (VT == MVT::i32)
3855 LC = RTLIB::SRA_I32;
3856 else if (VT == MVT::i64)
3857 LC = RTLIB::SRA_I64;
3858 else if (VT == MVT::i128)
3859 LC = RTLIB::SRA_I128;
3860 }
3861
3862 if (LC != RTLIB::UNKNOWN_LIBCALL && TLI.getLibcallName(LC)) {
3863 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
3864 TargetLowering::MakeLibCallOptions CallOptions;
3865 CallOptions.setSExt(isSigned);
3866 SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, CallOptions, dl).first, Lo, Hi);
3867 return;
3868 }
3869
3870 if (!ExpandShiftWithUnknownAmountBit(N, Lo, Hi))
3871 llvm_unreachable("Unsupported shift!")__builtin_unreachable();
3872}
3873
3874void DAGTypeLegalizer::ExpandIntRes_SIGN_EXTEND(SDNode *N,
3875 SDValue &Lo, SDValue &Hi) {
3876 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3877 SDLoc dl(N);
3878 SDValue Op = N->getOperand(0);
3879 if (Op.getValueType().bitsLE(NVT)) {
3880 // The low part is sign extension of the input (degenerates to a copy).
3881 Lo = DAG.getNode(ISD::SIGN_EXTEND, dl, NVT, N->getOperand(0));
3882 // The high part is obtained by SRA'ing all but one of the bits of low part.
3883 unsigned LoSize = NVT.getSizeInBits();
3884 Hi = DAG.getNode(
3885 ISD::SRA, dl, NVT, Lo,
3886 DAG.getConstant(LoSize - 1, dl, TLI.getPointerTy(DAG.getDataLayout())));
3887 } else {
3888 // For example, extension of an i48 to an i64. The operand type necessarily
3889 // promotes to the result type, so will end up being expanded too.
3890 assert(getTypeAction(Op.getValueType()) ==((void)0)
3891 TargetLowering::TypePromoteInteger &&((void)0)
3892 "Only know how to promote this result!")((void)0);
3893 SDValue Res = GetPromotedInteger(Op);
3894 assert(Res.getValueType() == N->getValueType(0) &&((void)0)
3895 "Operand over promoted?")((void)0);
3896 // Split the promoted operand. This will simplify when it is expanded.
3897 SplitInteger(Res, Lo, Hi);
3898 unsigned ExcessBits = Op.getValueSizeInBits() - NVT.getSizeInBits();
3899 Hi = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Hi.getValueType(), Hi,
3900 DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(),
3901 ExcessBits)));
3902 }
3903}
3904
3905void DAGTypeLegalizer::
3906ExpandIntRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi) {
3907 SDLoc dl(N);
3908 GetExpandedInteger(N->getOperand(0), Lo, Hi);
3909 EVT EVT = cast<VTSDNode>(N->getOperand(1))->getVT();
3910
3911 if (EVT.bitsLE(Lo.getValueType())) {
3912 // sext_inreg the low part if needed.
3913 Lo = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Lo.getValueType(), Lo,
3914 N->getOperand(1));
3915
3916 // The high part gets the sign extension from the lo-part. This handles
3917 // things like sextinreg V:i64 from i8.
3918 Hi = DAG.getNode(ISD::SRA, dl, Hi.getValueType(), Lo,
3919 DAG.getConstant(Hi.getValueSizeInBits() - 1, dl,
3920 TLI.getPointerTy(DAG.getDataLayout())));
3921 } else {
3922 // For example, extension of an i48 to an i64. Leave the low part alone,
3923 // sext_inreg the high part.
3924 unsigned ExcessBits = EVT.getSizeInBits() - Lo.getValueSizeInBits();
3925 Hi = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Hi.getValueType(), Hi,
3926 DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(),
3927 ExcessBits)));
3928 }
3929}
3930
3931void DAGTypeLegalizer::ExpandIntRes_SREM(SDNode *N,
3932 SDValue &Lo, SDValue &Hi) {
3933 EVT VT = N->getValueType(0);
3934 SDLoc dl(N);
3935 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
3936
3937 if (TLI.getOperationAction(ISD::SDIVREM, VT) == TargetLowering::Custom) {
3938 SDValue Res = DAG.getNode(ISD::SDIVREM, dl, DAG.getVTList(VT, VT), Ops);
3939 SplitInteger(Res.getValue(1), Lo, Hi);
3940 return;
3941 }
3942
3943 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
3944 if (VT == MVT::i16)
3945 LC = RTLIB::SREM_I16;
3946 else if (VT == MVT::i32)
3947 LC = RTLIB::SREM_I32;
3948 else if (VT == MVT::i64)
3949 LC = RTLIB::SREM_I64;
3950 else if (VT == MVT::i128)
3951 LC = RTLIB::SREM_I128;
3952 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SREM!")((void)0);
3953
3954 TargetLowering::MakeLibCallOptions CallOptions;
3955 CallOptions.setSExt(true);
3956 SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, CallOptions, dl).first, Lo, Hi);
3957}
3958
3959void DAGTypeLegalizer::ExpandIntRes_TRUNCATE(SDNode *N,
3960 SDValue &Lo, SDValue &Hi) {
3961 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
3962 SDLoc dl(N);
3963 Lo = DAG.getNode(ISD::TRUNCATE, dl, NVT, N->getOperand(0));
3964 Hi = DAG.getNode(ISD::SRL, dl, N->getOperand(0).getValueType(),
3965 N->getOperand(0),
3966 DAG.getConstant(NVT.getSizeInBits(), dl,
3967 TLI.getPointerTy(DAG.getDataLayout())));
3968 Hi = DAG.getNode(ISD::TRUNCATE, dl, NVT, Hi);
3969}
3970
3971void DAGTypeLegalizer::ExpandIntRes_XMULO(SDNode *N,
3972 SDValue &Lo, SDValue &Hi) {
3973 EVT VT = N->getValueType(0);
3974 SDLoc dl(N);
3975
3976 if (N->getOpcode() == ISD::UMULO) {
3977 // This section expands the operation into the following sequence of
3978 // instructions. `iNh` here refers to a type which has half the bit width of
3979 // the type the original operation operated on.
3980 //
3981 // %0 = %LHS.HI != 0 && %RHS.HI != 0
3982 // %1 = { iNh, i1 } @umul.with.overflow.iNh(iNh %LHS.HI, iNh %RHS.LO)
3983 // %2 = { iNh, i1 } @umul.with.overflow.iNh(iNh %RHS.HI, iNh %LHS.LO)
3984 // %3 = mul nuw iN (%LHS.LOW as iN), (%RHS.LOW as iN)
3985 // %4 = add iNh %1.0, %2.0 as iN
3986 // %5 = { iNh, i1 } @uadd.with.overflow.iNh(iNh %4, iNh %3.HIGH)
3987 //
3988 // %lo = %3.LO
3989 // %hi = %5.0
3990 // %ovf = %0 || %1.1 || %2.1 || %5.1
3991 SDValue LHS = N->getOperand(0), RHS = N->getOperand(1);
3992 SDValue LHSHigh, LHSLow, RHSHigh, RHSLow;
3993 GetExpandedInteger(LHS, LHSLow, LHSHigh);
3994 GetExpandedInteger(RHS, RHSLow, RHSHigh);
3995 EVT HalfVT = LHSLow.getValueType();
3996 EVT BitVT = N->getValueType(1);
3997 SDVTList VTHalfWithO = DAG.getVTList(HalfVT, BitVT);
3998
3999 SDValue HalfZero = DAG.getConstant(0, dl, HalfVT);
4000 SDValue Overflow = DAG.getNode(ISD::AND, dl, BitVT,
4001 DAG.getSetCC(dl, BitVT, LHSHigh, HalfZero, ISD::SETNE),
4002 DAG.getSetCC(dl, BitVT, RHSHigh, HalfZero, ISD::SETNE));
4003
4004 SDValue One = DAG.getNode(ISD::UMULO, dl, VTHalfWithO, LHSHigh, RHSLow);
4005 Overflow = DAG.getNode(ISD::OR, dl, BitVT, Overflow, One.getValue(1));
4006
4007 SDValue Two = DAG.getNode(ISD::UMULO, dl, VTHalfWithO, RHSHigh, LHSLow);
4008 Overflow = DAG.getNode(ISD::OR, dl, BitVT, Overflow, Two.getValue(1));
4009
4010 SDValue HighSum = DAG.getNode(ISD::ADD, dl, HalfVT, One, Two);
4011
4012 // Cannot use `UMUL_LOHI` directly, because some 32-bit targets (ARM) do not
4013 // know how to expand `i64,i64 = umul_lohi a, b` and abort (why isn’t this
4014 // operation recursively legalized?).
4015 //
4016 // Many backends understand this pattern and will convert into LOHI
4017 // themselves, if applicable.
4018 SDValue Three = DAG.getNode(ISD::MUL, dl, VT,
4019 DAG.getNode(ISD::ZERO_EXTEND, dl, VT, LHSLow),
4020 DAG.getNode(ISD::ZERO_EXTEND, dl, VT, RHSLow));
4021 SplitInteger(Three, Lo, Hi);
4022
4023 Hi = DAG.getNode(ISD::UADDO, dl, VTHalfWithO, Hi, HighSum);
4024 Overflow = DAG.getNode(ISD::OR, dl, BitVT, Overflow, Hi.getValue(1));
4025 ReplaceValueWith(SDValue(N, 1), Overflow);
4026 return;
4027 }
4028
4029 Type *RetTy = VT.getTypeForEVT(*DAG.getContext());
4030 EVT PtrVT = TLI.getPointerTy(DAG.getDataLayout());
4031 Type *PtrTy = PtrVT.getTypeForEVT(*DAG.getContext());
4032
4033 // Replace this with a libcall that will check overflow.
4034 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
4035 if (VT == MVT::i32)
4036 LC = RTLIB::MULO_I32;
4037 else if (VT == MVT::i64)
4038 LC = RTLIB::MULO_I64;
4039 else if (VT == MVT::i128)
4040 LC = RTLIB::MULO_I128;
4041 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XMULO!")((void)0);
4042
4043 SDValue Temp = DAG.CreateStackTemporary(PtrVT);
4044 // Temporary for the overflow value, default it to zero.
4045 SDValue Chain =
4046 DAG.getStore(DAG.getEntryNode(), dl, DAG.getConstant(0, dl, PtrVT), Temp,
4047 MachinePointerInfo());
4048
4049 TargetLowering::ArgListTy Args;
4050 TargetLowering::ArgListEntry Entry;
4051 for (const SDValue &Op : N->op_values()) {
4052 EVT ArgVT = Op.getValueType();
4053 Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
4054 Entry.Node = Op;
4055 Entry.Ty = ArgTy;
4056 Entry.IsSExt = true;
4057 Entry.IsZExt = false;
4058 Args.push_back(Entry);
4059 }
4060
4061 // Also pass the address of the overflow check.
4062 Entry.Node = Temp;
4063 Entry.Ty = PtrTy->getPointerTo();
4064 Entry.IsSExt = true;
4065 Entry.IsZExt = false;
4066 Args.push_back(Entry);
4067
4068 SDValue Func = DAG.getExternalSymbol(TLI.getLibcallName(LC), PtrVT);
4069
4070 TargetLowering::CallLoweringInfo CLI(DAG);
4071 CLI.setDebugLoc(dl)
4072 .setChain(Chain)
4073 .setLibCallee(TLI.getLibcallCallingConv(LC), RetTy, Func, std::move(Args))
4074 .setSExtResult();
4075
4076 std::pair<SDValue, SDValue> CallInfo = TLI.LowerCallTo(CLI);
4077
4078 SplitInteger(CallInfo.first, Lo, Hi);
4079 SDValue Temp2 =
4080 DAG.getLoad(PtrVT, dl, CallInfo.second, Temp, MachinePointerInfo());
4081 SDValue Ofl = DAG.getSetCC(dl, N->getValueType(1), Temp2,
4082 DAG.getConstant(0, dl, PtrVT),
4083 ISD::SETNE);
4084 // Use the overflow from the libcall everywhere.
4085 ReplaceValueWith(SDValue(N, 1), Ofl);
4086}
4087
4088void DAGTypeLegalizer::ExpandIntRes_UDIV(SDNode *N,
4089 SDValue &Lo, SDValue &Hi) {
4090 EVT VT = N->getValueType(0);
4091 SDLoc dl(N);
4092 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
4093
4094 if (TLI.getOperationAction(ISD::UDIVREM, VT) == TargetLowering::Custom) {
4095 SDValue Res = DAG.getNode(ISD::UDIVREM, dl, DAG.getVTList(VT, VT), Ops);
4096 SplitInteger(Res.getValue(0), Lo, Hi);
4097 return;
4098 }
4099
4100 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
4101 if (VT == MVT::i16)
4102 LC = RTLIB::UDIV_I16;
4103 else if (VT == MVT::i32)
4104 LC = RTLIB::UDIV_I32;
4105 else if (VT == MVT::i64)
4106 LC = RTLIB::UDIV_I64;
4107 else if (VT == MVT::i128)
4108 LC = RTLIB::UDIV_I128;
4109 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UDIV!")((void)0);
4110
4111 TargetLowering::MakeLibCallOptions CallOptions;
4112 SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, CallOptions, dl).first, Lo, Hi);
4113}
4114
4115void DAGTypeLegalizer::ExpandIntRes_UREM(SDNode *N,
4116 SDValue &Lo, SDValue &Hi) {
4117 EVT VT = N->getValueType(0);
4118 SDLoc dl(N);
4119 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
4120
4121 if (TLI.getOperationAction(ISD::UDIVREM, VT) == TargetLowering::Custom) {
4122 SDValue Res = DAG.getNode(ISD::UDIVREM, dl, DAG.getVTList(VT, VT), Ops);
4123 SplitInteger(Res.getValue(1), Lo, Hi);
4124 return;
4125 }
4126
4127 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
4128 if (VT == MVT::i16)
4129 LC = RTLIB::UREM_I16;
4130 else if (VT == MVT::i32)
4131 LC = RTLIB::UREM_I32;
4132 else if (VT == MVT::i64)
4133 LC = RTLIB::UREM_I64;
4134 else if (VT == MVT::i128)
4135 LC = RTLIB::UREM_I128;
4136 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UREM!")((void)0);
4137
4138 TargetLowering::MakeLibCallOptions CallOptions;
4139 SplitInteger(TLI.makeLibCall(DAG, LC, VT, Ops, CallOptions, dl).first, Lo, Hi);
4140}
4141
4142void DAGTypeLegalizer::ExpandIntRes_ZERO_EXTEND(SDNode *N,
4143 SDValue &Lo, SDValue &Hi) {
4144 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
4145 SDLoc dl(N);
4146 SDValue Op = N->getOperand(0);
4147 if (Op.getValueType().bitsLE(NVT)) {
4148 // The low part is zero extension of the input (degenerates to a copy).
4149 Lo = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, N->getOperand(0));
4150 Hi = DAG.getConstant(0, dl, NVT); // The high part is just a zero.
4151 } else {
4152 // For example, extension of an i48 to an i64. The operand type necessarily
4153 // promotes to the result type, so will end up being expanded too.
4154 assert(getTypeAction(Op.getValueType()) ==((void)0)
4155 TargetLowering::TypePromoteInteger &&((void)0)
4156 "Only know how to promote this result!")((void)0);
4157 SDValue Res = GetPromotedInteger(Op);
4158 assert(Res.getValueType() == N->getValueType(0) &&((void)0)
4159 "Operand over promoted?")((void)0);
4160 // Split the promoted operand. This will simplify when it is expanded.
4161 SplitInteger(Res, Lo, Hi);
4162 unsigned ExcessBits = Op.getValueSizeInBits() - NVT.getSizeInBits();
4163 Hi = DAG.getZeroExtendInReg(Hi, dl,
4164 EVT::getIntegerVT(*DAG.getContext(),
4165 ExcessBits));
4166 }
4167}
4168
4169void DAGTypeLegalizer::ExpandIntRes_ATOMIC_LOAD(SDNode *N,
4170 SDValue &Lo, SDValue &Hi) {
4171 SDLoc dl(N);
4172 EVT VT = cast<AtomicSDNode>(N)->getMemoryVT();
4173 SDVTList VTs = DAG.getVTList(VT, MVT::i1, MVT::Other);
4174 SDValue Zero = DAG.getConstant(0, dl, VT);
4175 SDValue Swap = DAG.getAtomicCmpSwap(
4176 ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS, dl,
4177 cast<AtomicSDNode>(N)->getMemoryVT(), VTs, N->getOperand(0),
4178 N->getOperand(1), Zero, Zero, cast<AtomicSDNode>(N)->getMemOperand());
4179
4180 ReplaceValueWith(SDValue(N, 0), Swap.getValue(0));
4181 ReplaceValueWith(SDValue(N, 1), Swap.getValue(2));
4182}
4183
4184void DAGTypeLegalizer::ExpandIntRes_VECREDUCE(SDNode *N,
4185 SDValue &Lo, SDValue &Hi) {
4186 // TODO For VECREDUCE_(AND|OR|XOR) we could split the vector and calculate
4187 // both halves independently.
4188 SDValue Res = TLI.expandVecReduce(N, DAG);
4189 SplitInteger(Res, Lo, Hi);
4190}
4191
4192void DAGTypeLegalizer::ExpandIntRes_Rotate(SDNode *N,
4193 SDValue &Lo, SDValue &Hi) {
4194 // Lower the rotate to shifts and ORs which can be expanded.
4195 SDValue Res;
4196 TLI.expandROT(N, true /*AllowVectorOps*/, Res, DAG);
4197 SplitInteger(Res, Lo, Hi);
4198}
4199
4200void DAGTypeLegalizer::ExpandIntRes_FunnelShift(SDNode *N,
4201 SDValue &Lo, SDValue &Hi) {
4202 // Lower the funnel shift to shifts and ORs which can be expanded.
4203 SDValue Res;
4204 TLI.expandFunnelShift(N, Res, DAG);
4205 SplitInteger(Res, Lo, Hi);
4206}
4207
4208void DAGTypeLegalizer::ExpandIntRes_VSCALE(SDNode *N, SDValue &Lo,
4209 SDValue &Hi) {
4210 EVT VT = N->getValueType(0);
4211 EVT HalfVT =
4212 EVT::getIntegerVT(*DAG.getContext(), N->getValueSizeInBits(0) / 2);
4213 SDLoc dl(N);
4214
4215 // We assume VSCALE(1) fits into a legal integer.
4216 APInt One(HalfVT.getSizeInBits(), 1);
4217 SDValue VScaleBase = DAG.getVScale(dl, HalfVT, One);
4218 VScaleBase = DAG.getNode(ISD::ZERO_EXTEND, dl, VT, VScaleBase);
4219 SDValue Res = DAG.getNode(ISD::MUL, dl, VT, VScaleBase, N->getOperand(0));
4220 SplitInteger(Res, Lo, Hi);
4221}
4222
4223//===----------------------------------------------------------------------===//
4224// Integer Operand Expansion
4225//===----------------------------------------------------------------------===//
4226
4227/// ExpandIntegerOperand - This method is called when the specified operand of
4228/// the specified node is found to need expansion. At this point, all of the
4229/// result types of the node are known to be legal, but other operands of the
4230/// node may need promotion or expansion as well as the specified one.
4231bool DAGTypeLegalizer::ExpandIntegerOperand(SDNode *N, unsigned OpNo) {
4232 LLVM_DEBUG(dbgs() << "Expand integer operand: "; N->dump(&DAG);do { } while (false)
4233 dbgs() << "\n")do { } while (false);
4234 SDValue Res = SDValue();
4235
4236 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
4237 return false;
4238
4239 switch (N->getOpcode()) {
4240 default:
4241 #ifndef NDEBUG1
4242 dbgs() << "ExpandIntegerOperand Op #" << OpNo << ": ";
4243 N->dump(&DAG); dbgs() << "\n";
4244 #endif
4245 report_fatal_error("Do not know how to expand this operator's operand!");
4246
4247 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
4248 case ISD::BR_CC: Res = ExpandIntOp_BR_CC(N); break;
4249 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
4250 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
4251 case ISD::INSERT_VECTOR_ELT: Res = ExpandOp_INSERT_VECTOR_ELT(N); break;
4252 case ISD::SCALAR_TO_VECTOR: Res = ExpandOp_SCALAR_TO_VECTOR(N); break;
4253 case ISD::SPLAT_VECTOR: Res = ExpandIntOp_SPLAT_VECTOR(N); break;
4254 case ISD::SELECT_CC: Res = ExpandIntOp_SELECT_CC(N); break;
4255 case ISD::SETCC: Res = ExpandIntOp_SETCC(N); break;
4256 case ISD::SETCCCARRY: Res = ExpandIntOp_SETCCCARRY(N); break;
4257 case ISD::STRICT_SINT_TO_FP:
4258 case ISD::SINT_TO_FP: Res = ExpandIntOp_SINT_TO_FP(N); break;
4259 case ISD::STORE: Res = ExpandIntOp_STORE(cast<StoreSDNode>(N), OpNo); break;
4260 case ISD::TRUNCATE: Res = ExpandIntOp_TRUNCATE(N); break;
4261 case ISD::STRICT_UINT_TO_FP:
4262 case ISD::UINT_TO_FP: Res = ExpandIntOp_UINT_TO_FP(N); break;
4263
4264 case ISD::SHL:
4265 case ISD::SRA:
4266 case ISD::SRL:
4267 case ISD::ROTL:
4268 case ISD::ROTR: Res = ExpandIntOp_Shift(N); break;
4269 case ISD::RETURNADDR:
4270 case ISD::FRAMEADDR: Res = ExpandIntOp_RETURNADDR(N); break;
4271
4272 case ISD::ATOMIC_STORE: Res = ExpandIntOp_ATOMIC_STORE(N); break;
4273 }
4274
4275 // If the result is null, the sub-method took care of registering results etc.
4276 if (!Res.getNode()) return false;
4277
4278 // If the result is N, the sub-method updated N in place. Tell the legalizer
4279 // core about this.
4280 if (Res.getNode() == N)
4281 return true;
4282
4283 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&((void)0)
4284 "Invalid operand expansion")((void)0);
4285
4286 ReplaceValueWith(SDValue(N, 0), Res);
4287 return false;
4288}
4289
4290/// IntegerExpandSetCCOperands - Expand the operands of a comparison. This code
4291/// is shared among BR_CC, SELECT_CC, and SETCC handlers.
4292void DAGTypeLegalizer::IntegerExpandSetCCOperands(SDValue &NewLHS,
4293 SDValue &NewRHS,
4294 ISD::CondCode &CCCode,
4295 const SDLoc &dl) {
4296 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
4297 GetExpandedInteger(NewLHS, LHSLo, LHSHi);
4298 GetExpandedInteger(NewRHS, RHSLo, RHSHi);
4299
4300 if (CCCode == ISD::SETEQ || CCCode == ISD::SETNE) {
4301 if (RHSLo == RHSHi) {
4302 if (ConstantSDNode *RHSCST = dyn_cast<ConstantSDNode>(RHSLo)) {
4303 if (RHSCST->isAllOnesValue()) {
4304 // Equality comparison to -1.
4305 NewLHS = DAG.getNode(ISD::AND, dl,
4306 LHSLo.getValueType(), LHSLo, LHSHi);
4307 NewRHS = RHSLo;
4308 return;
4309 }
4310 }
4311 }
4312
4313 NewLHS = DAG.getNode(ISD::XOR, dl, LHSLo.getValueType(), LHSLo, RHSLo);
4314 NewRHS = DAG.getNode(ISD::XOR, dl, LHSLo.getValueType(), LHSHi, RHSHi);
4315 NewLHS = DAG.getNode(ISD::OR, dl, NewLHS.getValueType(), NewLHS, NewRHS);
4316 NewRHS = DAG.getConstant(0, dl, NewLHS.getValueType());
4317 return;
4318 }
4319
4320 // If this is a comparison of the sign bit, just look at the top part.
4321 // X > -1, x < 0
4322 if (ConstantSDNode *CST = dyn_cast<ConstantSDNode>(NewRHS))
4323 if ((CCCode == ISD::SETLT && CST->isNullValue()) || // X < 0
4324 (CCCode == ISD::SETGT && CST->isAllOnesValue())) { // X > -1
4325 NewLHS = LHSHi;
4326 NewRHS = RHSHi;
4327 return;
4328 }
4329
4330 // FIXME: This generated code sucks.
4331 ISD::CondCode LowCC;
4332 switch (CCCode) {
4333 default: llvm_unreachable("Unknown integer setcc!")__builtin_unreachable();
4334 case ISD::SETLT:
4335 case ISD::SETULT: LowCC = ISD::SETULT; break;
4336 case ISD::SETGT:
4337 case ISD::SETUGT: LowCC = ISD::SETUGT; break;
4338 case ISD::SETLE:
4339 case ISD::SETULE: LowCC = ISD::SETULE; break;
4340 case ISD::SETGE:
4341 case ISD::SETUGE: LowCC = ISD::SETUGE; break;
4342 }
4343
4344 // LoCmp = lo(op1) < lo(op2) // Always unsigned comparison
4345 // HiCmp = hi(op1) < hi(op2) // Signedness depends on operands
4346 // dest = hi(op1) == hi(op2) ? LoCmp : HiCmp;
4347
4348 // NOTE: on targets without efficient SELECT of bools, we can always use
4349 // this identity: (B1 ? B2 : B3) --> (B1 & B2)|(!B1&B3)
4350 TargetLowering::DAGCombinerInfo DagCombineInfo(DAG, AfterLegalizeTypes, true,
4351 nullptr);
4352 SDValue LoCmp, HiCmp;
4353 if (TLI.isTypeLegal(LHSLo.getValueType()) &&
4354 TLI.isTypeLegal(RHSLo.getValueType()))
4355 LoCmp = TLI.SimplifySetCC(getSetCCResultType(LHSLo.getValueType()), LHSLo,
4356 RHSLo, LowCC, false, DagCombineInfo, dl);
4357 if (!LoCmp.getNode())
4358 LoCmp = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()), LHSLo,
4359 RHSLo, LowCC);
4360 if (TLI.isTypeLegal(LHSHi.getValueType()) &&
4361 TLI.isTypeLegal(RHSHi.getValueType()))
4362 HiCmp = TLI.SimplifySetCC(getSetCCResultType(LHSHi.getValueType()), LHSHi,
4363 RHSHi, CCCode, false, DagCombineInfo, dl);
4364 if (!HiCmp.getNode())
4365 HiCmp =
4366 DAG.getNode(ISD::SETCC, dl, getSetCCResultType(LHSHi.getValueType()),
4367 LHSHi, RHSHi, DAG.getCondCode(CCCode));
4368
4369 ConstantSDNode *LoCmpC = dyn_cast<ConstantSDNode>(LoCmp.getNode());
4370 ConstantSDNode *HiCmpC = dyn_cast<ConstantSDNode>(HiCmp.getNode());
4371
4372 bool EqAllowed = (CCCode == ISD::SETLE || CCCode == ISD::SETGE ||
4373 CCCode == ISD::SETUGE || CCCode == ISD::SETULE);
4374
4375 if ((EqAllowed && (HiCmpC && HiCmpC->isNullValue())) ||
4376 (!EqAllowed && ((HiCmpC && (HiCmpC->getAPIntValue() == 1)) ||
4377 (LoCmpC && LoCmpC->isNullValue())))) {
4378 // For LE / GE, if high part is known false, ignore the low part.
4379 // For LT / GT: if low part is known false, return the high part.
4380 // if high part is known true, ignore the low part.
4381 NewLHS = HiCmp;
4382 NewRHS = SDValue();
4383 return;
4384 }
4385
4386 if (LHSHi == RHSHi) {
4387 // Comparing the low bits is enough.
4388 NewLHS = LoCmp;
4389 NewRHS = SDValue();
4390 return;
4391 }
4392
4393 // Lower with SETCCCARRY if the target supports it.
4394 EVT HiVT = LHSHi.getValueType();
4395 EVT ExpandVT = TLI.getTypeToExpandTo(*DAG.getContext(), HiVT);
4396 bool HasSETCCCARRY = TLI.isOperationLegalOrCustom(ISD::SETCCCARRY, ExpandVT);
4397
4398 // FIXME: Make all targets support this, then remove the other lowering.
4399 if (HasSETCCCARRY) {
4400 // SETCCCARRY can detect < and >= directly. For > and <=, flip
4401 // operands and condition code.
4402 bool FlipOperands = false;
4403 switch (CCCode) {
4404 case ISD::SETGT: CCCode = ISD::SETLT; FlipOperands = true; break;
4405 case ISD::SETUGT: CCCode = ISD::SETULT; FlipOperands = true; break;
4406 case ISD::SETLE: CCCode = ISD::SETGE; FlipOperands = true; break;
4407 case ISD::SETULE: CCCode = ISD::SETUGE; FlipOperands = true; break;
4408 default: break;
4409 }
4410 if (FlipOperands) {
4411 std::swap(LHSLo, RHSLo);
4412 std::swap(LHSHi, RHSHi);
4413 }
4414 // Perform a wide subtraction, feeding the carry from the low part into
4415 // SETCCCARRY. The SETCCCARRY operation is essentially looking at the high
4416 // part of the result of LHS - RHS. It is negative iff LHS < RHS. It is
4417 // zero or positive iff LHS >= RHS.
4418 EVT LoVT = LHSLo.getValueType();
4419 SDVTList VTList = DAG.getVTList(LoVT, getSetCCResultType(LoVT));
4420 SDValue LowCmp = DAG.getNode(ISD::USUBO, dl, VTList, LHSLo, RHSLo);
4421 SDValue Res = DAG.getNode(ISD::SETCCCARRY, dl, getSetCCResultType(HiVT),
4422 LHSHi, RHSHi, LowCmp.getValue(1),
4423 DAG.getCondCode(CCCode));
4424 NewLHS = Res;
4425 NewRHS = SDValue();
4426 return;
4427 }
4428
4429 NewLHS = TLI.SimplifySetCC(getSetCCResultType(HiVT), LHSHi, RHSHi, ISD::SETEQ,
4430 false, DagCombineInfo, dl);
4431 if (!NewLHS.getNode())
4432 NewLHS =
4433 DAG.getSetCC(dl, getSetCCResultType(HiVT), LHSHi, RHSHi, ISD::SETEQ);
4434 NewLHS = DAG.getSelect(dl, LoCmp.getValueType(), NewLHS, LoCmp, HiCmp);
4435 NewRHS = SDValue();
4436}
4437
4438SDValue DAGTypeLegalizer::ExpandIntOp_BR_CC(SDNode *N) {
4439 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
4440 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
4441 IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
4442
4443 // If ExpandSetCCOperands returned a scalar, we need to compare the result
4444 // against zero to select between true and false values.
4445 if (!NewRHS.getNode()) {
4446 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
4447 CCCode = ISD::SETNE;
4448 }
4449
4450 // Update N to have the operands specified.
4451 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
4452 DAG.getCondCode(CCCode), NewLHS, NewRHS,
4453 N->getOperand(4)), 0);
4454}
4455
4456SDValue DAGTypeLegalizer::ExpandIntOp_SELECT_CC(SDNode *N) {
4457 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
4458 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
4459 IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
4460
4461 // If ExpandSetCCOperands returned a scalar, we need to compare the result
4462 // against zero to select between true and false values.
4463 if (!NewRHS.getNode()) {
4464 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
4465 CCCode = ISD::SETNE;
4466 }
4467
4468 // Update N to have the operands specified.
4469 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
4470 N->getOperand(2), N->getOperand(3),
4471 DAG.getCondCode(CCCode)), 0);
4472}
4473
4474SDValue DAGTypeLegalizer::ExpandIntOp_SETCC(SDNode *N) {
4475 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
4476 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
4477 IntegerExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
4478
4479 // If ExpandSetCCOperands returned a scalar, use it.
4480 if (!NewRHS.getNode()) {
4481 assert(NewLHS.getValueType() == N->getValueType(0) &&((void)0)
4482 "Unexpected setcc expansion!")((void)0);
4483 return NewLHS;
4484 }
4485
4486 // Otherwise, update N to have the operands specified.
4487 return SDValue(
4488 DAG.UpdateNodeOperands(N, NewLHS, NewRHS, DAG.getCondCode(CCCode)), 0);
4489}
4490
4491SDValue DAGTypeLegalizer::ExpandIntOp_SETCCCARRY(SDNode *N) {
4492 SDValue LHS = N->getOperand(0);
4493 SDValue RHS = N->getOperand(1);
4494 SDValue Carry = N->getOperand(2);
4495 SDValue Cond = N->getOperand(3);
4496 SDLoc dl = SDLoc(N);
4497
4498 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
4499 GetExpandedInteger(LHS, LHSLo, LHSHi);
4500 GetExpandedInteger(RHS, RHSLo, RHSHi);
4501
4502 // Expand to a SUBE for the low part and a smaller SETCCCARRY for the high.
4503 SDVTList VTList = DAG.getVTList(LHSLo.getValueType(), Carry.getValueType());
4504 SDValue LowCmp = DAG.getNode(ISD::SUBCARRY, dl, VTList, LHSLo, RHSLo, Carry);
4505 return DAG.getNode(ISD::SETCCCARRY, dl, N->getValueType(0), LHSHi, RHSHi,
4506 LowCmp.getValue(1), Cond);
4507}
4508
4509SDValue DAGTypeLegalizer::ExpandIntOp_SPLAT_VECTOR(SDNode *N) {
4510 // Split the operand and replace with SPLAT_VECTOR_PARTS.
4511 SDValue Lo, Hi;
4512 GetExpandedInteger(N->getOperand(0), Lo, Hi);
4513 return DAG.getNode(ISD::SPLAT_VECTOR_PARTS, SDLoc(N), N->getValueType(0), Lo,
4514 Hi);
4515}
4516
4517SDValue DAGTypeLegalizer::ExpandIntOp_Shift(SDNode *N) {
4518 // The value being shifted is legal, but the shift amount is too big.
4519 // It follows that either the result of the shift is undefined, or the
4520 // upper half of the shift amount is zero. Just use the lower half.
4521 SDValue Lo, Hi;
4522 GetExpandedInteger(N->getOperand(1), Lo, Hi);
4523 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0), Lo), 0);
4524}
4525
4526SDValue DAGTypeLegalizer::ExpandIntOp_RETURNADDR(SDNode *N) {
4527 // The argument of RETURNADDR / FRAMEADDR builtin is 32 bit contant. This
4528 // surely makes pretty nice problems on 8/16 bit targets. Just truncate this
4529 // constant to valid type.
4530 SDValue Lo, Hi;
4531 GetExpandedInteger(N->getOperand(0), Lo, Hi);
4532 return SDValue(DAG.UpdateNodeOperands(N, Lo), 0);
4533}
4534
4535SDValue DAGTypeLegalizer::ExpandIntOp_SINT_TO_FP(SDNode *N) {
4536 bool IsStrict = N->isStrictFPOpcode();
4537 SDValue Chain = IsStrict ? N->getOperand(0) : SDValue();
4538 SDValue Op = N->getOperand(IsStrict ? 1 : 0);
4539 EVT DstVT = N->getValueType(0);
4540 RTLIB::Libcall LC = RTLIB::getSINTTOFP(Op.getValueType(), DstVT);
4541 assert(LC != RTLIB::UNKNOWN_LIBCALL &&((void)0)
4542 "Don't know how to expand this SINT_TO_FP!")((void)0);
4543 TargetLowering::MakeLibCallOptions CallOptions;
4544 CallOptions.setSExt(true);
4545 std::pair<SDValue, SDValue> Tmp =
4546 TLI.makeLibCall(DAG, LC, DstVT, Op, CallOptions, SDLoc(N), Chain);
4547
4548 if (!IsStrict)
4549 return Tmp.first;
4550
4551 ReplaceValueWith(SDValue(N, 1), Tmp.second);
4552 ReplaceValueWith(SDValue(N, 0), Tmp.first);
4553 return SDValue();
4554}
4555
4556SDValue DAGTypeLegalizer::ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo) {
4557 if (N->isAtomic()) {
4558 // It's typical to have larger CAS than atomic store instructions.
4559 SDLoc dl(N);
4560 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
4561 N->getMemoryVT(),
4562 N->getOperand(0), N->getOperand(2),
4563 N->getOperand(1),
4564 N->getMemOperand());
4565 return Swap.getValue(1);
4566 }
4567 if (ISD::isNormalStore(N))
4568 return ExpandOp_NormalStore(N, OpNo);
4569
4570 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!")((void)0);
4571 assert(OpNo == 1 && "Can only expand the stored value so far")((void)0);
4572
4573 EVT VT = N->getOperand(1).getValueType();
4574 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
4575 SDValue Ch = N->getChain();
4576 SDValue Ptr = N->getBasePtr();
4577 MachineMemOperand::Flags MMOFlags = N->getMemOperand()->getFlags();
4578 AAMDNodes AAInfo = N->getAAInfo();
4579 SDLoc dl(N);
4580 SDValue Lo, Hi;
4581
4582 assert(NVT.isByteSized() && "Expanded type not byte sized!")((void)0);
4583
4584 if (N->getMemoryVT().bitsLE(NVT)) {
4585 GetExpandedInteger(N->getValue(), Lo, Hi);
4586 return DAG.getTruncStore(Ch, dl, Lo, Ptr, N->getPointerInfo(),
4587 N->getMemoryVT(), N->getOriginalAlign(), MMOFlags,
4588 AAInfo);
4589 }
4590
4591 if (DAG.getDataLayout().isLittleEndian()) {
4592 // Little-endian - low bits are at low addresses.
4593 GetExpandedInteger(N->getValue(), Lo, Hi);
4594
4595 Lo = DAG.getStore(Ch, dl, Lo, Ptr, N->getPointerInfo(),
4596 N->getOriginalAlign(), MMOFlags, AAInfo);
4597
4598 unsigned ExcessBits =
4599 N->getMemoryVT().getSizeInBits() - NVT.getSizeInBits();
4600 EVT NEVT = EVT::getIntegerVT(*DAG.getContext(), ExcessBits);
4601
4602 // Increment the pointer to the other half.
4603 unsigned IncrementSize = NVT.getSizeInBits()/8;
4604 Ptr = DAG.getObjectPtrOffset(dl, Ptr, TypeSize::Fixed(IncrementSize));
4605 Hi = DAG.getTruncStore(Ch, dl, Hi, Ptr,
4606 N->getPointerInfo().getWithOffset(IncrementSize),
4607 NEVT, N->getOriginalAlign(), MMOFlags, AAInfo);
4608 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi);
4609 }
4610
4611 // Big-endian - high bits are at low addresses. Favor aligned stores at
4612 // the cost of some bit-fiddling.
4613 GetExpandedInteger(N->getValue(), Lo, Hi);
4614
4615 EVT ExtVT = N->getMemoryVT();
4616 unsigned EBytes = ExtVT.getStoreSize();
4617 unsigned IncrementSize = NVT.getSizeInBits()/8;
4618 unsigned ExcessBits = (EBytes - IncrementSize)*8;
4619 EVT HiVT = EVT::getIntegerVT(*DAG.getContext(),
4620 ExtVT.getSizeInBits() - ExcessBits);
4621
4622 if (ExcessBits < NVT.getSizeInBits()) {
4623 // Transfer high bits from the top of Lo to the bottom of Hi.
4624 Hi = DAG.getNode(ISD::SHL, dl, NVT, Hi,
4625 DAG.getConstant(NVT.getSizeInBits() - ExcessBits, dl,
4626 TLI.getPointerTy(DAG.getDataLayout())));
4627 Hi = DAG.getNode(
4628 ISD::OR, dl, NVT, Hi,
4629 DAG.getNode(ISD::SRL, dl, NVT, Lo,
4630 DAG.getConstant(ExcessBits, dl,
4631 TLI.getPointerTy(DAG.getDataLayout()))));
4632 }
4633
4634 // Store both the high bits and maybe some of the low bits.
4635 Hi = DAG.getTruncStore(Ch, dl, Hi, Ptr, N->getPointerInfo(), HiVT,
4636 N->getOriginalAlign(), MMOFlags, AAInfo);
4637
4638 // Increment the pointer to the other half.
4639 Ptr = DAG.getObjectPtrOffset(dl, Ptr, TypeSize::Fixed(IncrementSize));
4640 // Store the lowest ExcessBits bits in the second half.
4641 Lo = DAG.getTruncStore(Ch, dl, Lo, Ptr,
4642 N->getPointerInfo().getWithOffset(IncrementSize),
4643 EVT::getIntegerVT(*DAG.getContext(), ExcessBits),
4644 N->getOriginalAlign(), MMOFlags, AAInfo);
4645 return DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Lo, Hi);
4646}
4647
4648SDValue DAGTypeLegalizer::ExpandIntOp_TRUNCATE(SDNode *N) {
4649 SDValue InL, InH;
4650 GetExpandedInteger(N->getOperand(0), InL, InH);
4651 // Just truncate the low part of the source.
4652 return DAG.getNode(ISD::TRUNCATE, SDLoc(N), N->getValueType(0), InL);
4653}
4654
4655SDValue DAGTypeLegalizer::ExpandIntOp_UINT_TO_FP(SDNode *N) {
4656 bool IsStrict = N->isStrictFPOpcode();
4657 SDValue Chain = IsStrict ? N->getOperand(0) : SDValue();
4658 SDValue Op = N->getOperand(IsStrict ? 1 : 0);
4659 EVT DstVT = N->getValueType(0);
4660 RTLIB::Libcall LC = RTLIB::getUINTTOFP(Op.getValueType(), DstVT);
4661 assert(LC != RTLIB::UNKNOWN_LIBCALL &&((void)0)
4662 "Don't know how to expand this UINT_TO_FP!")((void)0);
4663 TargetLowering::MakeLibCallOptions CallOptions;
4664 CallOptions.setSExt(true);
4665 std::pair<SDValue, SDValue> Tmp =
4666 TLI.makeLibCall(DAG, LC, DstVT, Op, CallOptions, SDLoc(N), Chain);
4667
4668 if (!IsStrict)
4669 return Tmp.first;
4670
4671 ReplaceValueWith(SDValue(N, 1), Tmp.second);
4672 ReplaceValueWith(SDValue(N, 0), Tmp.first);
4673 return SDValue();
4674}
4675
4676SDValue DAGTypeLegalizer::ExpandIntOp_ATOMIC_STORE(SDNode *N) {
4677 SDLoc dl(N);
4678 SDValue Swap = DAG.getAtomic(ISD::ATOMIC_SWAP, dl,
4679 cast<AtomicSDNode>(N)->getMemoryVT(),
4680 N->getOperand(0),
4681 N->getOperand(1), N->getOperand(2),
4682 cast<AtomicSDNode>(N)->getMemOperand());
4683 return Swap.getValue(1);
4684}
4685
4686SDValue DAGTypeLegalizer::PromoteIntRes_VECTOR_SPLICE(SDNode *N) {
4687 SDLoc dl(N);
4688
4689 SDValue V0 = GetPromotedInteger(N->getOperand(0));
4690 SDValue V1 = GetPromotedInteger(N->getOperand(1));
4691 EVT OutVT = V0.getValueType();
4692
4693 return DAG.getNode(ISD::VECTOR_SPLICE, dl, OutVT, V0, V1, N->getOperand(2));
4694}
4695
4696SDValue DAGTypeLegalizer::PromoteIntRes_EXTRACT_SUBVECTOR(SDNode *N) {
4697
4698 EVT OutVT = N->getValueType(0);
4699 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4700 assert(NOutVT.isVector() && "This type must be promoted to a vector type")((void)0);
4701 EVT NOutVTElem = NOutVT.getVectorElementType();
4702
4703 SDLoc dl(N);
4704 SDValue BaseIdx = N->getOperand(1);
4705
4706 // TODO: We may be able to use this for types other than scalable
4707 // vectors and fix those tests that expect BUILD_VECTOR to be used
4708 if (OutVT.isScalableVector()) {
4709 SDValue InOp0 = N->getOperand(0);
4710 EVT InVT = InOp0.getValueType();
4711
4712 // Promote operands and see if this is handled by target lowering,
4713 // Otherwise, use the BUILD_VECTOR approach below
4714 if (getTypeAction(InVT) == TargetLowering::TypePromoteInteger) {
4715 // Collect the (promoted) operands
4716 SDValue Ops[] = { GetPromotedInteger(InOp0), BaseIdx };
4717
4718 EVT PromEltVT = Ops[0].getValueType().getVectorElementType();
4719 assert(PromEltVT.bitsLE(NOutVTElem) &&((void)0)
4720 "Promoted operand has an element type greater than result")((void)0);
4721
4722 EVT ExtVT = NOutVT.changeVectorElementType(PromEltVT);
4723 SDValue Ext = DAG.getNode(ISD::EXTRACT_SUBVECTOR, SDLoc(N), ExtVT, Ops);
4724 return DAG.getNode(ISD::ANY_EXTEND, dl, NOutVT, Ext);
4725 }
4726 }
4727
4728 if (OutVT.isScalableVector())
4729 report_fatal_error("Unable to promote scalable types using BUILD_VECTOR");
4730
4731 SDValue InOp0 = N->getOperand(0);
4732 if (getTypeAction(InOp0.getValueType()) == TargetLowering::TypePromoteInteger)
4733 InOp0 = GetPromotedInteger(N->getOperand(0));
4734
4735 EVT InVT = InOp0.getValueType();
4736
4737 unsigned OutNumElems = OutVT.getVectorNumElements();
4738 SmallVector<SDValue, 8> Ops;
4739 Ops.reserve(OutNumElems);
4740 for (unsigned i = 0; i != OutNumElems; ++i) {
4741
4742 // Extract the element from the original vector.
4743 SDValue Index = DAG.getNode(ISD::ADD, dl, BaseIdx.getValueType(),
4744 BaseIdx, DAG.getConstant(i, dl, BaseIdx.getValueType()));
4745 SDValue Ext = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
4746 InVT.getVectorElementType(), N->getOperand(0), Index);
4747
4748 SDValue Op = DAG.getAnyExtOrTrunc(Ext, dl, NOutVTElem);
4749 // Insert the converted element to the new vector.
4750 Ops.push_back(Op);
4751 }
4752
4753 return DAG.getBuildVector(NOutVT, dl, Ops);
4754}
4755
4756SDValue DAGTypeLegalizer::PromoteIntRes_INSERT_SUBVECTOR(SDNode *N) {
4757 EVT OutVT = N->getValueType(0);
4758 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4759 assert(NOutVT.isVector() && "This type must be promoted to a vector type")((void)0);
4760
4761 SDLoc dl(N);
4762 SDValue Vec = N->getOperand(0);
4763 SDValue SubVec = N->getOperand(1);
4764 SDValue Idx = N->getOperand(2);
4765
4766 EVT SubVecVT = SubVec.getValueType();
4767 EVT NSubVT =
4768 EVT::getVectorVT(*DAG.getContext(), NOutVT.getVectorElementType(),
4769 SubVecVT.getVectorElementCount());
4770
4771 Vec = GetPromotedInteger(Vec);
4772 SubVec = DAG.getNode(ISD::ANY_EXTEND, dl, NSubVT, SubVec);
4773
4774 return DAG.getNode(ISD::INSERT_SUBVECTOR, dl, NOutVT, Vec, SubVec, Idx);
4775}
4776
4777SDValue DAGTypeLegalizer::PromoteIntRes_VECTOR_REVERSE(SDNode *N) {
4778 SDLoc dl(N);
4779
4780 SDValue V0 = GetPromotedInteger(N->getOperand(0));
4781 EVT OutVT = V0.getValueType();
4782
4783 return DAG.getNode(ISD::VECTOR_REVERSE, dl, OutVT, V0);
4784}
4785
4786SDValue DAGTypeLegalizer::PromoteIntRes_VECTOR_SHUFFLE(SDNode *N) {
4787 ShuffleVectorSDNode *SV = cast<ShuffleVectorSDNode>(N);
4788 EVT VT = N->getValueType(0);
4789 SDLoc dl(N);
4790
4791 ArrayRef<int> NewMask = SV->getMask().slice(0, VT.getVectorNumElements());
4792
4793 SDValue V0 = GetPromotedInteger(N->getOperand(0));
4794 SDValue V1 = GetPromotedInteger(N->getOperand(1));
4795 EVT OutVT = V0.getValueType();
4796
4797 return DAG.getVectorShuffle(OutVT, dl, V0, V1, NewMask);
4798}
4799
4800
4801SDValue DAGTypeLegalizer::PromoteIntRes_BUILD_VECTOR(SDNode *N) {
4802 EVT OutVT = N->getValueType(0);
4803 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4804 assert(NOutVT.isVector() && "This type must be promoted to a vector type")((void)0);
4805 unsigned NumElems = N->getNumOperands();
4806 EVT NOutVTElem = NOutVT.getVectorElementType();
4807
4808 SDLoc dl(N);
4809
4810 SmallVector<SDValue, 8> Ops;
4811 Ops.reserve(NumElems);
4812 for (unsigned i = 0; i != NumElems; ++i) {
4813 SDValue Op;
4814 // BUILD_VECTOR integer operand types are allowed to be larger than the
4815 // result's element type. This may still be true after the promotion. For
4816 // example, we might be promoting (<v?i1> = BV <i32>, <i32>, ...) to
4817 // (v?i16 = BV <i32>, <i32>, ...), and we can't any_extend <i32> to <i16>.
4818 if (N->getOperand(i).getValueType().bitsLT(NOutVTElem))
4819 Op = DAG.getNode(ISD::ANY_EXTEND, dl, NOutVTElem, N->getOperand(i));
4820 else
4821 Op = N->getOperand(i);
4822 Ops.push_back(Op);
4823 }
4824
4825 return DAG.getBuildVector(NOutVT, dl, Ops);
4826}
4827
4828SDValue DAGTypeLegalizer::PromoteIntRes_SCALAR_TO_VECTOR(SDNode *N) {
4829
4830 SDLoc dl(N);
4831
4832 assert(!N->getOperand(0).getValueType().isVector() &&((void)0)
4833 "Input must be a scalar")((void)0);
4834
4835 EVT OutVT = N->getValueType(0);
4836 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4837 assert(NOutVT.isVector() && "This type must be promoted to a vector type")((void)0);
4838 EVT NOutVTElem = NOutVT.getVectorElementType();
4839
4840 SDValue Op = DAG.getNode(ISD::ANY_EXTEND, dl, NOutVTElem, N->getOperand(0));
4841
4842 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, NOutVT, Op);
4843}
4844
4845SDValue DAGTypeLegalizer::PromoteIntRes_SPLAT_VECTOR(SDNode *N) {
4846 SDLoc dl(N);
4847
4848 SDValue SplatVal = N->getOperand(0);
4849
4850 assert(!SplatVal.getValueType().isVector() && "Input must be a scalar")((void)0);
4851
4852 EVT OutVT = N->getValueType(0);
4853 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4854 assert(NOutVT.isVector() && "Type must be promoted to a vector type")((void)0);
4855 EVT NOutElemVT = NOutVT.getVectorElementType();
4856
4857 SDValue Op = DAG.getNode(ISD::ANY_EXTEND, dl, NOutElemVT, SplatVal);
4858
4859 return DAG.getNode(ISD::SPLAT_VECTOR, dl, NOutVT, Op);
4860}
4861
4862SDValue DAGTypeLegalizer::PromoteIntRes_STEP_VECTOR(SDNode *N) {
4863 SDLoc dl(N);
4864 EVT OutVT = N->getValueType(0);
4865 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4866 assert(NOutVT.isVector() && "Type must be promoted to a vector type")((void)0);
4867 APInt StepVal = cast<ConstantSDNode>(N->getOperand(0))->getAPIntValue();
4868 return DAG.getStepVector(dl, NOutVT,
4869 StepVal.sext(NOutVT.getScalarSizeInBits()));
4870}
4871
4872SDValue DAGTypeLegalizer::PromoteIntRes_CONCAT_VECTORS(SDNode *N) {
4873 SDLoc dl(N);
4874
4875 EVT OutVT = N->getValueType(0);
4876 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4877 assert(NOutVT.isVector() && "This type must be promoted to a vector type")((void)0);
4878
4879 EVT OutElemTy = NOutVT.getVectorElementType();
4880
4881 unsigned NumElem = N->getOperand(0).getValueType().getVectorNumElements();
4882 unsigned NumOutElem = NOutVT.getVectorNumElements();
4883 unsigned NumOperands = N->getNumOperands();
4884 assert(NumElem * NumOperands == NumOutElem &&((void)0)
4885 "Unexpected number of elements")((void)0);
4886
4887 // Take the elements from the first vector.
4888 SmallVector<SDValue, 8> Ops(NumOutElem);
4889 for (unsigned i = 0; i < NumOperands; ++i) {
4890 SDValue Op = N->getOperand(i);
4891 if (getTypeAction(Op.getValueType()) == TargetLowering::TypePromoteInteger)
4892 Op = GetPromotedInteger(Op);
4893 EVT SclrTy = Op.getValueType().getVectorElementType();
4894 assert(NumElem == Op.getValueType().getVectorNumElements() &&((void)0)
4895 "Unexpected number of elements")((void)0);
4896
4897 for (unsigned j = 0; j < NumElem; ++j) {
4898 SDValue Ext = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, SclrTy, Op,
4899 DAG.getVectorIdxConstant(j, dl));
4900 Ops[i * NumElem + j] = DAG.getAnyExtOrTrunc(Ext, dl, OutElemTy);
4901 }
4902 }
4903
4904 return DAG.getBuildVector(NOutVT, dl, Ops);
4905}
4906
4907SDValue DAGTypeLegalizer::PromoteIntRes_EXTEND_VECTOR_INREG(SDNode *N) {
4908 EVT VT = N->getValueType(0);
4909 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
4910 assert(NVT.isVector() && "This type must be promoted to a vector type")((void)0);
4911
4912 SDLoc dl(N);
4913
4914 // For operands whose TypeAction is to promote, extend the promoted node
4915 // appropriately (ZERO_EXTEND or SIGN_EXTEND) from the original pre-promotion
4916 // type, and then construct a new *_EXTEND_VECTOR_INREG node to the promote-to
4917 // type..
4918 if (getTypeAction(N->getOperand(0).getValueType())
4919 == TargetLowering::TypePromoteInteger) {
4920 SDValue Promoted;
4921
4922 switch(N->getOpcode()) {
4923 case ISD::SIGN_EXTEND_VECTOR_INREG:
4924 Promoted = SExtPromotedInteger(N->getOperand(0));
4925 break;
4926 case ISD::ZERO_EXTEND_VECTOR_INREG:
4927 Promoted = ZExtPromotedInteger(N->getOperand(0));
4928 break;
4929 case ISD::ANY_EXTEND_VECTOR_INREG:
4930 Promoted = GetPromotedInteger(N->getOperand(0));
4931 break;
4932 default:
4933 llvm_unreachable("Node has unexpected Opcode")__builtin_unreachable();
4934 }
4935 return DAG.getNode(N->getOpcode(), dl, NVT, Promoted);
4936 }
4937
4938 // Directly extend to the appropriate transform-to type.
4939 return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0));
4940}
4941
4942SDValue DAGTypeLegalizer::PromoteIntRes_INSERT_VECTOR_ELT(SDNode *N) {
4943 EVT OutVT = N->getValueType(0);
4944 EVT NOutVT = TLI.getTypeToTransformTo(*DAG.getContext(), OutVT);
4945 assert(NOutVT.isVector() && "This type must be promoted to a vector type")((void)0);
4946
4947 EVT NOutVTElem = NOutVT.getVectorElementType();
4948
4949 SDLoc dl(N);
4950 SDValue V0 = GetPromotedInteger(N->getOperand(0));
4951
4952 SDValue ConvElem = DAG.getNode(ISD::ANY_EXTEND, dl,
4953 NOutVTElem, N->getOperand(1));
4954 return DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, NOutVT,
4955 V0, ConvElem, N->getOperand(2));
4956}
4957
4958SDValue DAGTypeLegalizer::PromoteIntRes_VECREDUCE(SDNode *N) {
4959 // The VECREDUCE result size may be larger than the element size, so
4960 // we can simply change the result type.
4961 SDLoc dl(N);
4962 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
4963 return DAG.getNode(N->getOpcode(), dl, NVT, N->getOperand(0));
4964}
4965
4966SDValue DAGTypeLegalizer::PromoteIntOp_EXTRACT_VECTOR_ELT(SDNode *N) {
4967 SDLoc dl(N);
4968 SDValue V0 = GetPromotedInteger(N->getOperand(0));
4969 SDValue V1 = DAG.getZExtOrTrunc(N->getOperand(1), dl,
4970 TLI.getVectorIdxTy(DAG.getDataLayout()));
4971 SDValue Ext = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl,
4972 V0->getValueType(0).getScalarType(), V0, V1);
4973
4974 // EXTRACT_VECTOR_ELT can return types which are wider than the incoming
4975 // element types. If this is the case then we need to expand the outgoing
4976 // value and not truncate it.
4977 return DAG.getAnyExtOrTrunc(Ext, dl, N->getValueType(0));
4978}
4979
4980SDValue DAGTypeLegalizer::PromoteIntOp_EXTRACT_SUBVECTOR(SDNode *N) {
4981 SDLoc dl(N);
4982 SDValue V0 = GetPromotedInteger(N->getOperand(0));
4983 MVT InVT = V0.getValueType().getSimpleVT();
4984 MVT OutVT = MVT::getVectorVT(InVT.getVectorElementType(),
4985 N->getValueType(0).getVectorNumElements());
4986 SDValue Ext = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OutVT, V0, N->getOperand(1));
4987 return DAG.getNode(ISD::TRUNCATE, dl, N->getValueType(0), Ext);
4988}
4989
4990SDValue DAGTypeLegalizer::PromoteIntOp_CONCAT_VECTORS(SDNode *N) {
4991 SDLoc dl(N);
4992
4993 EVT ResVT = N->getValueType(0);
4994 unsigned NumElems = N->getNumOperands();
4995
4996 if (ResVT.isScalableVector()) {
4997 SDValue ResVec = DAG.getUNDEF(ResVT);
4998
4999 for (unsigned OpIdx = 0; OpIdx < NumElems; ++OpIdx) {
5000 SDValue Op = N->getOperand(OpIdx);
5001 unsigned OpNumElts = Op.getValueType().getVectorMinNumElements();
5002 ResVec = DAG.getNode(ISD::INSERT_SUBVECTOR, dl, ResVT, ResVec, Op,
5003 DAG.getIntPtrConstant(OpIdx * OpNumElts, dl));
5004 }
5005
5006 return ResVec;
5007 }
5008
5009 EVT RetSclrTy = N->getValueType(0).getVectorElementType();
5010
5011 SmallVector<SDValue, 8> NewOps;
5012 NewOps.reserve(NumElems);
5013
5014 // For each incoming vector
5015 for (unsigned VecIdx = 0; VecIdx != NumElems; ++VecIdx) {
5016 SDValue Incoming = GetPromotedInteger(N->getOperand(VecIdx));
5017 EVT SclrTy = Incoming->getValueType(0).getVectorElementType();
5018 unsigned NumElem = Incoming->getValueType(0).getVectorNumElements();
5019
5020 for (unsigned i=0; i<NumElem; ++i) {
5021 // Extract element from incoming vector
5022 SDValue Ex = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, SclrTy, Incoming,
5023 DAG.getVectorIdxConstant(i, dl));
5024 SDValue Tr = DAG.getNode(ISD::TRUNCATE, dl, RetSclrTy, Ex);
5025 NewOps.push_back(Tr);
5026 }
5027 }
5028
5029 return DAG.getBuildVector(N->getValueType(0), dl, NewOps);
5030}
←

/usr/src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/CodeGen/SelectionDAGNodes.h

1//===- llvm/CodeGen/SelectionDAGNodes.h - SelectionDAG Nodes ----*- C++ -*-===//
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 declares the SDNode class and derived classes, which are used to
10// represent the nodes and operations present in a SelectionDAG. These nodes
11// and operations are machine code level operations, with some similarities to
12// the GCC RTL representation.
13//
14// Clients should include the SelectionDAG.h file instead of this file directly.
15//
16//===----------------------------------------------------------------------===//
17
18#ifndef LLVM_CODEGEN_SELECTIONDAGNODES_H
19#define LLVM_CODEGEN_SELECTIONDAGNODES_H
20
21#include "llvm/ADT/APFloat.h"
22#include "llvm/ADT/ArrayRef.h"
23#include "llvm/ADT/BitVector.h"
24#include "llvm/ADT/FoldingSet.h"
25#include "llvm/ADT/GraphTraits.h"
26#include "llvm/ADT/SmallPtrSet.h"
27#include "llvm/ADT/SmallVector.h"
28#include "llvm/ADT/ilist_node.h"
29#include "llvm/ADT/iterator.h"
30#include "llvm/ADT/iterator_range.h"
31#include "llvm/CodeGen/ISDOpcodes.h"
32#include "llvm/CodeGen/MachineMemOperand.h"
33#include "llvm/CodeGen/Register.h"
34#include "llvm/CodeGen/ValueTypes.h"
35#include "llvm/IR/Constants.h"
36#include "llvm/IR/DebugLoc.h"
37#include "llvm/IR/Instruction.h"
38#include "llvm/IR/Instructions.h"
39#include "llvm/IR/Metadata.h"
40#include "llvm/IR/Operator.h"
41#include "llvm/Support/AlignOf.h"
42#include "llvm/Support/AtomicOrdering.h"
43#include "llvm/Support/Casting.h"
44#include "llvm/Support/ErrorHandling.h"
45#include "llvm/Support/MachineValueType.h"
46#include "llvm/Support/TypeSize.h"
47#include <algorithm>
48#include <cassert>
49#include <climits>
50#include <cstddef>
51#include <cstdint>
52#include <cstring>
53#include <iterator>
54#include <string>
55#include <tuple>
56
57namespace llvm {
58
59class APInt;
60class Constant;
61template <typename T> struct DenseMapInfo;
62class GlobalValue;
63class MachineBasicBlock;
64class MachineConstantPoolValue;
65class MCSymbol;
66class raw_ostream;
67class SDNode;
68class SelectionDAG;
69class Type;
70class Value;
71
72void checkForCycles(const SDNode *N, const SelectionDAG *DAG = nullptr,
73 bool force = false);
74
75/// This represents a list of ValueType's that has been intern'd by
76/// a SelectionDAG. Instances of this simple value class are returned by
77/// SelectionDAG::getVTList(...).
78///
79struct SDVTList {
80 const EVT *VTs;
81 unsigned int NumVTs;
82};
83
84namespace ISD {
85
86 /// Node predicates
87
88/// If N is a BUILD_VECTOR or SPLAT_VECTOR node whose elements are all the
89/// same constant or undefined, return true and return the constant value in
90/// \p SplatValue.
91bool isConstantSplatVector(const SDNode *N, APInt &SplatValue);
92
93/// Return true if the specified node is a BUILD_VECTOR or SPLAT_VECTOR where
94/// all of the elements are ~0 or undef. If \p BuildVectorOnly is set to
95/// true, it only checks BUILD_VECTOR.
96bool isConstantSplatVectorAllOnes(const SDNode *N,
97 bool BuildVectorOnly = false);
98
99/// Return true if the specified node is a BUILD_VECTOR or SPLAT_VECTOR where
100/// all of the elements are 0 or undef. If \p BuildVectorOnly is set to true, it
101/// only checks BUILD_VECTOR.
102bool isConstantSplatVectorAllZeros(const SDNode *N,
103 bool BuildVectorOnly = false);
104
105/// Return true if the specified node is a BUILD_VECTOR where all of the
106/// elements are ~0 or undef.
107bool isBuildVectorAllOnes(const SDNode *N);
108
109/// Return true if the specified node is a BUILD_VECTOR where all of the
110/// elements are 0 or undef.
111bool isBuildVectorAllZeros(const SDNode *N);
112
113/// Return true if the specified node is a BUILD_VECTOR node of all
114/// ConstantSDNode or undef.
115bool isBuildVectorOfConstantSDNodes(const SDNode *N);
116
117/// Return true if the specified node is a BUILD_VECTOR node of all
118/// ConstantFPSDNode or undef.
119bool isBuildVectorOfConstantFPSDNodes(const SDNode *N);
120
121/// Return true if the node has at least one operand and all operands of the
122/// specified node are ISD::UNDEF.
123bool allOperandsUndef(const SDNode *N);
124
125} // end namespace ISD
126
127//===----------------------------------------------------------------------===//
128/// Unlike LLVM values, Selection DAG nodes may return multiple
129/// values as the result of a computation. Many nodes return multiple values,
130/// from loads (which define a token and a return value) to ADDC (which returns
131/// a result and a carry value), to calls (which may return an arbitrary number
132/// of values).
133///
134/// As such, each use of a SelectionDAG computation must indicate the node that
135/// computes it as well as which return value to use from that node. This pair
136/// of information is represented with the SDValue value type.
137///
138class SDValue {
139 friend struct DenseMapInfo<SDValue>;
140
141 SDNode *Node = nullptr; // The node defining the value we are using.
142 unsigned ResNo = 0; // Which return value of the node we are using.
143
144public:
145 SDValue() = default;
146 SDValue(SDNode *node, unsigned resno);
147
148 /// get the index which selects a specific result in the SDNode
149 unsigned getResNo() const { return ResNo; }
150
151 /// get the SDNode which holds the desired result
152 SDNode *getNode() const { return Node; }
153
154 /// set the SDNode
155 void setNode(SDNode *N) { Node = N; }
156
157 inline SDNode *operator->() const { return Node; }
158
159 bool operator==(const SDValue &O) const {
160 return Node == O.Node && ResNo == O.ResNo;
161 }
162 bool operator!=(const SDValue &O) const {
163 return !operator==(O);
164 }
165 bool operator<(const SDValue &O) const {
166 return std::tie(Node, ResNo) < std::tie(O.Node, O.ResNo);
167 }
168 explicit operator bool() const {
169 return Node != nullptr;
170 }
171
172 SDValue getValue(unsigned R) const {
173 return SDValue(Node, R);
174 }
175
176 /// Return true if this node is an operand of N.
177 bool isOperandOf(const SDNode *N) const;
178
179 /// Return the ValueType of the referenced return value.
180 inline EVT getValueType() const;
181
182 /// Return the simple ValueType of the referenced return value.
183 MVT getSimpleValueType() const {
184 return getValueType().getSimpleVT();
185 }
186
187 /// Returns the size of the value in bits.
188 ///
189 /// If the value type is a scalable vector type, the scalable property will
190 /// be set and the runtime size will be a positive integer multiple of the
191 /// base size.
192 TypeSize getValueSizeInBits() const {
193 return getValueType().getSizeInBits();
194 }
195
196 uint64_t getScalarValueSizeInBits() const {
197 return getValueType().getScalarType().getFixedSizeInBits();
198 }
199
200 // Forwarding methods - These forward to the corresponding methods in SDNode.
201 inline unsigned getOpcode() const;
202 inline unsigned getNumOperands() const;
203 inline const SDValue &getOperand(unsigned i) const;
204 inline uint64_t getConstantOperandVal(unsigned i) const;
205 inline const APInt &getConstantOperandAPInt(unsigned i) const;
206 inline bool isTargetMemoryOpcode() const;
207 inline bool isTargetOpcode() const;
208 inline bool isMachineOpcode() const;
209 inline bool isUndef() const;
210 inline unsigned getMachineOpcode() const;
211 inline const DebugLoc &getDebugLoc() const;
212 inline void dump() const;
213 inline void dump(const SelectionDAG *G) const;
214 inline void dumpr() const;
215 inline void dumpr(const SelectionDAG *G) const;
216
217 /// Return true if this operand (which must be a chain) reaches the
218 /// specified operand without crossing any side-effecting instructions.
219 /// In practice, this looks through token factors and non-volatile loads.
220 /// In order to remain efficient, this only
221 /// looks a couple of nodes in, it does not do an exhaustive search.
222 bool reachesChainWithoutSideEffects(SDValue Dest,
223 unsigned Depth = 2) const;
224
225 /// Return true if there are no nodes using value ResNo of Node.
226 inline bool use_empty() const;
227
228 /// Return true if there is exactly one node using value ResNo of Node.
229 inline bool hasOneUse() const;
230};
231
232template<> struct DenseMapInfo<SDValue> {
233 static inline SDValue getEmptyKey() {
234 SDValue V;
235 V.ResNo = -1U;
236 return V;
237 }
238
239 static inline SDValue getTombstoneKey() {
240 SDValue V;
241 V.ResNo = -2U;
242 return V;
243 }
244
245 static unsigned getHashValue(const SDValue &Val) {
246 return ((unsigned)((uintptr_t)Val.getNode() >> 4) ^
247 (unsigned)((uintptr_t)Val.getNode() >> 9)) + Val.getResNo();
248 }
249
250 static bool isEqual(const SDValue &LHS, const SDValue &RHS) {
251 return LHS == RHS;
252 }
253};
254
255/// Allow casting operators to work directly on
256/// SDValues as if they were SDNode*'s.
257template<> struct simplify_type<SDValue> {
258 using SimpleType = SDNode *;
259
260 static SimpleType getSimplifiedValue(SDValue &Val) {
261 return Val.getNode();
262 }
263};
264template<> struct simplify_type<const SDValue> {
265 using SimpleType = /*const*/ SDNode *;
266
267 static SimpleType getSimplifiedValue(const SDValue &Val) {
268 return Val.getNode();
269 }
270};
271
272/// Represents a use of a SDNode. This class holds an SDValue,
273/// which records the SDNode being used and the result number, a
274/// pointer to the SDNode using the value, and Next and Prev pointers,
275/// which link together all the uses of an SDNode.
276///
277class SDUse {
278 /// Val - The value being used.
279 SDValue Val;
280 /// User - The user of this value.
281 SDNode *User = nullptr;
282 /// Prev, Next - Pointers to the uses list of the SDNode referred by
283 /// this operand.
284 SDUse **Prev = nullptr;
285 SDUse *Next = nullptr;
286
287public:
288 SDUse() = default;
289 SDUse(const SDUse &U) = delete;
290 SDUse &operator=(const SDUse &) = delete;
291
292 /// Normally SDUse will just implicitly convert to an SDValue that it holds.
293 operator const SDValue&() const { return Val; }
294
295 /// If implicit conversion to SDValue doesn't work, the get() method returns
296 /// the SDValue.
297 const SDValue &get() const { return Val; }
298
299 /// This returns the SDNode that contains this Use.
300 SDNode *getUser() { return User; }
301
302 /// Get the next SDUse in the use list.
303 SDUse *getNext() const { return Next; }
304
305 /// Convenience function for get().getNode().
306 SDNode *getNode() const { return Val.getNode(); }
307 /// Convenience function for get().getResNo().
308 unsigned getResNo() const { return Val.getResNo(); }
309 /// Convenience function for get().getValueType().
310 EVT getValueType() const { return Val.getValueType(); }
311
312 /// Convenience function for get().operator==
313 bool operator==(const SDValue &V) const {
314 return Val == V;
315 }
316
317 /// Convenience function for get().operator!=
318 bool operator!=(const SDValue &V) const {
319 return Val != V;
320 }
321
322 /// Convenience function for get().operator<
323 bool operator<(const SDValue &V) const {
324 return Val < V;
325 }
326
327private:
328 friend class SelectionDAG;
329 friend class SDNode;
330 // TODO: unfriend HandleSDNode once we fix its operand handling.
331 friend class HandleSDNode;
332
333 void setUser(SDNode *p) { User = p; }
334
335 /// Remove this use from its existing use list, assign it the
336 /// given value, and add it to the new value's node's use list.
337 inline void set(const SDValue &V);
338 /// Like set, but only supports initializing a newly-allocated
339 /// SDUse with a non-null value.
340 inline void setInitial(const SDValue &V);
341 /// Like set, but only sets the Node portion of the value,
342 /// leaving the ResNo portion unmodified.
343 inline void setNode(SDNode *N);
344
345 void addToList(SDUse **List) {
346 Next = *List;
347 if (Next) Next->Prev = &Next;
348 Prev = List;
349 *List = this;
350 }
351
352 void removeFromList() {
353 *Prev = Next;
354 if (Next) Next->Prev = Prev;
355 }
356};
357
358/// simplify_type specializations - Allow casting operators to work directly on
359/// SDValues as if they were SDNode*'s.
360template<> struct simplify_type<SDUse> {
361 using SimpleType = SDNode *;
362
363 static SimpleType getSimplifiedValue(SDUse &Val) {
364 return Val.getNode();
365 }
366};
367
368/// These are IR-level optimization flags that may be propagated to SDNodes.
369/// TODO: This data structure should be shared by the IR optimizer and the
370/// the backend.
371struct SDNodeFlags {
372private:
373 bool NoUnsignedWrap : 1;
374 bool NoSignedWrap : 1;
375 bool Exact : 1;
376 bool NoNaNs : 1;
377 bool NoInfs : 1;
378 bool NoSignedZeros : 1;
379 bool AllowReciprocal : 1;
380 bool AllowContract : 1;
381 bool ApproximateFuncs : 1;
382 bool AllowReassociation : 1;
383
384 // We assume instructions do not raise floating-point exceptions by default,
385 // and only those marked explicitly may do so. We could choose to represent
386 // this via a positive "FPExcept" flags like on the MI level, but having a
387 // negative "NoFPExcept" flag here (that defaults to true) makes the flag
388 // intersection logic more straightforward.
389 bool NoFPExcept : 1;
390
391public:
392 /// Default constructor turns off all optimization flags.
393 SDNodeFlags()
394 : NoUnsignedWrap(false), NoSignedWrap(false), Exact(false), NoNaNs(false),
395 NoInfs(false), NoSignedZeros(false), AllowReciprocal(false),
396 AllowContract(false), ApproximateFuncs(false),
397 AllowReassociation(false), NoFPExcept(false) {}
398
399 /// Propagate the fast-math-flags from an IR FPMathOperator.
400 void copyFMF(const FPMathOperator &FPMO) {
401 setNoNaNs(FPMO.hasNoNaNs());
402 setNoInfs(FPMO.hasNoInfs());
403 setNoSignedZeros(FPMO.hasNoSignedZeros());
404 setAllowReciprocal(FPMO.hasAllowReciprocal());
405 setAllowContract(FPMO.hasAllowContract());
406 setApproximateFuncs(FPMO.hasApproxFunc());
407 setAllowReassociation(FPMO.hasAllowReassoc());
408 }
409
410 // These are mutators for each flag.
411 void setNoUnsignedWrap(bool b) { NoUnsignedWrap = b; }
412 void setNoSignedWrap(bool b) { NoSignedWrap = b; }
413 void setExact(bool b) { Exact = b; }
414 void setNoNaNs(bool b) { NoNaNs = b; }
415 void setNoInfs(bool b) { NoInfs = b; }
416 void setNoSignedZeros(bool b) { NoSignedZeros = b; }
417 void setAllowReciprocal(bool b) { AllowReciprocal = b; }
418 void setAllowContract(bool b) { AllowContract = b; }
419 void setApproximateFuncs(bool b) { ApproximateFuncs = b; }
420 void setAllowReassociation(bool b) { AllowReassociation = b; }
421 void setNoFPExcept(bool b) { NoFPExcept = b; }
422
423 // These are accessors for each flag.
424 bool hasNoUnsignedWrap() const { return NoUnsignedWrap; }
425 bool hasNoSignedWrap() const { return NoSignedWrap; }
426 bool hasExact() const { return Exact; }
427 bool hasNoNaNs() const { return NoNaNs; }
428 bool hasNoInfs() const { return NoInfs; }
429 bool hasNoSignedZeros() const { return NoSignedZeros; }
430 bool hasAllowReciprocal() const { return AllowReciprocal; }
431 bool hasAllowContract() const { return AllowContract; }
432 bool hasApproximateFuncs() const { return ApproximateFuncs; }
433 bool hasAllowReassociation() const { return AllowReassociation; }
434 bool hasNoFPExcept() const { return NoFPExcept; }
435
436 /// Clear any flags in this flag set that aren't also set in Flags. All
437 /// flags will be cleared if Flags are undefined.
438 void intersectWith(const SDNodeFlags Flags) {
439 NoUnsignedWrap &= Flags.NoUnsignedWrap;
440 NoSignedWrap &= Flags.NoSignedWrap;
441 Exact &= Flags.Exact;
442 NoNaNs &= Flags.NoNaNs;
443 NoInfs &= Flags.NoInfs;
444 NoSignedZeros &= Flags.NoSignedZeros;
445 AllowReciprocal &= Flags.AllowReciprocal;
446 AllowContract &= Flags.AllowContract;
447 ApproximateFuncs &= Flags.ApproximateFuncs;
448 AllowReassociation &= Flags.AllowReassociation;
449 NoFPExcept &= Flags.NoFPExcept;
450 }
451};
452
453/// Represents one node in the SelectionDAG.
454///
455class SDNode : public FoldingSetNode, public ilist_node<SDNode> {
456private:
457 /// The operation that this node performs.
458 int16_t NodeType;
459
460protected:
461 // We define a set of mini-helper classes to help us interpret the bits in our
462 // SubclassData. These are designed to fit within a uint16_t so they pack
463 // with NodeType.
464
465#if defined(_AIX) && (!defined(__GNUC__4) || defined(__clang__1))
466// Except for GCC; by default, AIX compilers store bit-fields in 4-byte words
467// and give the `pack` pragma push semantics.
468#define BEGIN_TWO_BYTE_PACK() _Pragma("pack(2)")pack(2)
469#define END_TWO_BYTE_PACK() _Pragma("pack(pop)")pack(pop)
470#else
471#define BEGIN_TWO_BYTE_PACK()
472#define END_TWO_BYTE_PACK()
473#endif
474
475BEGIN_TWO_BYTE_PACK()
476 class SDNodeBitfields {
477 friend class SDNode;
478 friend class MemIntrinsicSDNode;
479 friend class MemSDNode;
480 friend class SelectionDAG;
481
482 uint16_t HasDebugValue : 1;
483 uint16_t IsMemIntrinsic : 1;
484 uint16_t IsDivergent : 1;
485 };
486 enum { NumSDNodeBits = 3 };
487
488 class ConstantSDNodeBitfields {
489 friend class ConstantSDNode;
490
491 uint16_t : NumSDNodeBits;
492
493 uint16_t IsOpaque : 1;
494 };
495
496 class MemSDNodeBitfields {
497 friend class MemSDNode;
498 friend class MemIntrinsicSDNode;
499 friend class AtomicSDNode;
500
501 uint16_t : NumSDNodeBits;
502
503 uint16_t IsVolatile : 1;
504 uint16_t IsNonTemporal : 1;
505 uint16_t IsDereferenceable : 1;
506 uint16_t IsInvariant : 1;
507 };
508 enum { NumMemSDNodeBits = NumSDNodeBits + 4 };
509
510 class LSBaseSDNodeBitfields {
511 friend class LSBaseSDNode;
512 friend class MaskedLoadStoreSDNode;
513 friend class MaskedGatherScatterSDNode;
514
515 uint16_t : NumMemSDNodeBits;
516
517 // This storage is shared between disparate class hierarchies to hold an
518 // enumeration specific to the class hierarchy in use.
519 // LSBaseSDNode => enum ISD::MemIndexedMode
520 // MaskedLoadStoreBaseSDNode => enum ISD::MemIndexedMode
521 // MaskedGatherScatterSDNode => enum ISD::MemIndexType
522 uint16_t AddressingMode : 3;
523 };
524 enum { NumLSBaseSDNodeBits = NumMemSDNodeBits + 3 };
525
526 class LoadSDNodeBitfields {
527 friend class LoadSDNode;
528 friend class MaskedLoadSDNode;
529 friend class MaskedGatherSDNode;
530
531 uint16_t : NumLSBaseSDNodeBits;
532
533 uint16_t ExtTy : 2; // enum ISD::LoadExtType
534 uint16_t IsExpanding : 1;
535 };
536
537 class StoreSDNodeBitfields {
538 friend class StoreSDNode;
539 friend class MaskedStoreSDNode;
540 friend class MaskedScatterSDNode;
541
542 uint16_t : NumLSBaseSDNodeBits;
543
544 uint16_t IsTruncating : 1;
545 uint16_t IsCompressing : 1;
546 };
547
548 union {
549 char RawSDNodeBits[sizeof(uint16_t)];
550 SDNodeBitfields SDNodeBits;
551 ConstantSDNodeBitfields ConstantSDNodeBits;
552 MemSDNodeBitfields MemSDNodeBits;
553 LSBaseSDNodeBitfields LSBaseSDNodeBits;
554 LoadSDNodeBitfields LoadSDNodeBits;
555 StoreSDNodeBitfields StoreSDNodeBits;
556 };
557END_TWO_BYTE_PACK()
558#undef BEGIN_TWO_BYTE_PACK
559#undef END_TWO_BYTE_PACK
560
561 // RawSDNodeBits must cover the entirety of the union. This means that all of
562 // the union's members must have size <= RawSDNodeBits. We write the RHS as
563 // "2" instead of sizeof(RawSDNodeBits) because MSVC can't handle the latter.
564 static_assert(sizeof(SDNodeBitfields) <= 2, "field too wide");
565 static_assert(sizeof(ConstantSDNodeBitfields) <= 2, "field too wide");
566 static_assert(sizeof(MemSDNodeBitfields) <= 2, "field too wide");
567 static_assert(sizeof(LSBaseSDNodeBitfields) <= 2, "field too wide");
568 static_assert(sizeof(LoadSDNodeBitfields) <= 2, "field too wide");
569 static_assert(sizeof(StoreSDNodeBitfields) <= 2, "field too wide");
570
571private:
572 friend class SelectionDAG;
573 // TODO: unfriend HandleSDNode once we fix its operand handling.
574 friend class HandleSDNode;
575
576 /// Unique id per SDNode in the DAG.
577 int NodeId = -1;
578
579 /// The values that are used by this operation.
580 SDUse *OperandList = nullptr;
581
582 /// The types of the values this node defines. SDNode's may
583 /// define multiple values simultaneously.
584 const EVT *ValueList;
585
586 /// List of uses for this SDNode.
587 SDUse *UseList = nullptr;
588
589 /// The number of entries in the Operand/Value list.
590 unsigned short NumOperands = 0;
591 unsigned short NumValues;
592
593 // The ordering of the SDNodes. It roughly corresponds to the ordering of the
594 // original LLVM instructions.
595 // This is used for turning off scheduling, because we'll forgo
596 // the normal scheduling algorithms and output the instructions according to
597 // this ordering.
598 unsigned IROrder;
599
600 /// Source line information.
601 DebugLoc debugLoc;
602
603 /// Return a pointer to the specified value type.
604 static const EVT *getValueTypeList(EVT VT);
605
606 SDNodeFlags Flags;
607
608public:
609 /// Unique and persistent id per SDNode in the DAG.
610 /// Used for debug printing.
611 uint16_t PersistentId;
612
613 //===--------------------------------------------------------------------===//
614 // Accessors
615 //
616
617 /// Return the SelectionDAG opcode value for this node. For
618 /// pre-isel nodes (those for which isMachineOpcode returns false), these
619 /// are the opcode values in the ISD and <target>ISD namespaces. For
620 /// post-isel opcodes, see getMachineOpcode.
621 unsigned getOpcode() const { return (unsigned short)NodeType; }
622
623 /// Test if this node has a target-specific opcode (in the
624 /// \<target\>ISD namespace).
625 bool isTargetOpcode() const { return NodeType >= ISD::BUILTIN_OP_END; }
626
627 /// Test if this node has a target-specific opcode that may raise
628 /// FP exceptions (in the \<target\>ISD namespace and greater than
629 /// FIRST_TARGET_STRICTFP_OPCODE). Note that all target memory
630 /// opcode are currently automatically considered to possibly raise
631 /// FP exceptions as well.
632 bool isTargetStrictFPOpcode() const {
633 return NodeType >= ISD::FIRST_TARGET_STRICTFP_OPCODE;
634 }
635
636 /// Test if this node has a target-specific
637 /// memory-referencing opcode (in the \<target\>ISD namespace and
638 /// greater than FIRST_TARGET_MEMORY_OPCODE).
639 bool isTargetMemoryOpcode() const {
640 return NodeType >= ISD::FIRST_TARGET_MEMORY_OPCODE;
641 }
642
643 /// Return true if the type of the node type undefined.
644 bool isUndef() const { return NodeType == ISD::UNDEF; }
645
646 /// Test if this node is a memory intrinsic (with valid pointer information).
647 /// INTRINSIC_W_CHAIN and INTRINSIC_VOID nodes are sometimes created for
648 /// non-memory intrinsics (with chains) that are not really instances of
649 /// MemSDNode. For such nodes, we need some extra state to determine the
650 /// proper classof relationship.
651 bool isMemIntrinsic() const {
652 return (NodeType == ISD::INTRINSIC_W_CHAIN ||
653 NodeType == ISD::INTRINSIC_VOID) &&
654 SDNodeBits.IsMemIntrinsic;
655 }
656
657 /// Test if this node is a strict floating point pseudo-op.
658 bool isStrictFPOpcode() {
659 switch (NodeType) {
660 default:
661 return false;
662 case ISD::STRICT_FP16_TO_FP:
663 case ISD::STRICT_FP_TO_FP16:
664#define DAG_INSTRUCTION(NAME, NARG, ROUND_MODE, INTRINSIC, DAGN) \
665 case ISD::STRICT_##DAGN:
666#include "llvm/IR/ConstrainedOps.def"
667 return true;
668 }
669 }
670
671 /// Test if this node has a post-isel opcode, directly
672 /// corresponding to a MachineInstr opcode.
673 bool isMachineOpcode() const { return NodeType < 0; }
674
675 /// This may only be called if isMachineOpcode returns
676 /// true. It returns the MachineInstr opcode value that the node's opcode
677 /// corresponds to.
678 unsigned getMachineOpcode() const {
679 assert(isMachineOpcode() && "Not a MachineInstr opcode!")((void)0);
680 return ~NodeType;
681 }
682
683 bool getHasDebugValue() const { return SDNodeBits.HasDebugValue; }
684 void setHasDebugValue(bool b) { SDNodeBits.HasDebugValue = b; }
685
686 bool isDivergent() const { return SDNodeBits.IsDivergent; }
687
688 /// Return true if there are no uses of this node.
689 bool use_empty() const { return UseList == nullptr; }
690
691 /// Return true if there is exactly one use of this node.
692 bool hasOneUse() const { return hasSingleElement(uses()); }
693
694 /// Return the number of uses of this node. This method takes
695 /// time proportional to the number of uses.
696 size_t use_size() const { return std::distance(use_begin(), use_end()); }
697
698 /// Return the unique node id.
699 int getNodeId() const { return NodeId; }
700
701 /// Set unique node id.
702 void setNodeId(int Id) { NodeId = Id; }
703
704 /// Return the node ordering.
705 unsigned getIROrder() const { return IROrder; }
706
707 /// Set the node ordering.
708 void setIROrder(unsigned Order) { IROrder = Order; }
709
710 /// Return the source location info.
711 const DebugLoc &getDebugLoc() const { return debugLoc; }
712
713 /// Set source location info. Try to avoid this, putting
714 /// it in the constructor is preferable.
715 void setDebugLoc(DebugLoc dl) { debugLoc = std::move(dl); }
716
717 /// This class provides iterator support for SDUse
718 /// operands that use a specific SDNode.
719 class use_iterator {
720 friend class SDNode;
721
722 SDUse *Op = nullptr;
723
724 explicit use_iterator(SDUse *op) : Op(op) {}
725
726 public:
727 using iterator_category = std::forward_iterator_tag;
728 using value_type = SDUse;
729 using difference_type = std::ptrdiff_t;
730 using pointer = value_type *;
731 using reference = value_type &;
732
733 use_iterator() = default;
734 use_iterator(const use_iterator &I) : Op(I.Op) {}
735
736 bool operator==(const use_iterator &x) const {
737 return Op == x.Op;
738 }
739 bool operator!=(const use_iterator &x) const {
740 return !operator==(x);
741 }
742
743 /// Return true if this iterator is at the end of uses list.
744 bool atEnd() const { return Op == nullptr; }
745
746 // Iterator traversal: forward iteration only.
747 use_iterator &operator++() { // Preincrement
748 assert(Op && "Cannot increment end iterator!")((void)0);
749 Op = Op->getNext();
750 return *this;
751 }
752
753 use_iterator operator++(int) { // Postincrement
754 use_iterator tmp = *this; ++*this; return tmp;
755 }
756
757 /// Retrieve a pointer to the current user node.
758 SDNode *operator*() const {
759 assert(Op && "Cannot dereference end iterator!")((void)0);
760 return Op->getUser();
761 }
762
763 SDNode *operator->() const { return operator*(); }
764
765 SDUse &getUse() const { return *Op; }
766
767 /// Retrieve the operand # of this use in its user.
768 unsigned getOperandNo() const {
769 assert(Op && "Cannot dereference end iterator!")((void)0);
770 return (unsigned)(Op - Op->getUser()->OperandList);
771 }
772 };
773
774 /// Provide iteration support to walk over all uses of an SDNode.
775 use_iterator use_begin() const {
776 return use_iterator(UseList);
777 }
778
779 static use_iterator use_end() { return use_iterator(nullptr); }
780
781 inline iterator_range<use_iterator> uses() {
782 return make_range(use_begin(), use_end());
783 }
784 inline iterator_range<use_iterator> uses() const {
785 return make_range(use_begin(), use_end());
786 }
787
788 /// Return true if there are exactly NUSES uses of the indicated value.
789 /// This method ignores uses of other values defined by this operation.
790 bool hasNUsesOfValue(unsigned NUses, unsigned Value) const;
791
792 /// Return true if there are any use of the indicated value.
793 /// This method ignores uses of other values defined by this operation.
794 bool hasAnyUseOfValue(unsigned Value) const;
795
796 /// Return true if this node is the only use of N.
797 bool isOnlyUserOf(const SDNode *N) const;
798
799 /// Return true if this node is an operand of N.
800 bool isOperandOf(const SDNode *N) const;
801
802 /// Return true if this node is a predecessor of N.
803 /// NOTE: Implemented on top of hasPredecessor and every bit as
804 /// expensive. Use carefully.
805 bool isPredecessorOf(const SDNode *N) const {
806 return N->hasPredecessor(this);
807 }
808
809 /// Return true if N is a predecessor of this node.
810 /// N is either an operand of this node, or can be reached by recursively
811 /// traversing up the operands.
812 /// NOTE: This is an expensive method. Use it carefully.
813 bool hasPredecessor(const SDNode *N) const;
814
815 /// Returns true if N is a predecessor of any node in Worklist. This
816 /// helper keeps Visited and Worklist sets externally to allow unions
817 /// searches to be performed in parallel, caching of results across
818 /// queries and incremental addition to Worklist. Stops early if N is
819 /// found but will resume. Remember to clear Visited and Worklists
820 /// if DAG changes. MaxSteps gives a maximum number of nodes to visit before
821 /// giving up. The TopologicalPrune flag signals that positive NodeIds are
822 /// topologically ordered (Operands have strictly smaller node id) and search
823 /// can be pruned leveraging this.
824 static bool hasPredecessorHelper(const SDNode *N,
825 SmallPtrSetImpl<const SDNode *> &Visited,
826 SmallVectorImpl<const SDNode *> &Worklist,
827 unsigned int MaxSteps = 0,
828 bool TopologicalPrune = false) {
829 SmallVector<const SDNode *, 8> DeferredNodes;
830 if (Visited.count(N))
831 return true;
832
833 // Node Id's are assigned in three places: As a topological
834 // ordering (> 0), during legalization (results in values set to
835 // 0), new nodes (set to -1). If N has a topolgical id then we
836 // know that all nodes with ids smaller than it cannot be
837 // successors and we need not check them. Filter out all node
838 // that can't be matches. We add them to the worklist before exit
839 // in case of multiple calls. Note that during selection the topological id
840 // may be violated if a node's predecessor is selected before it. We mark
841 // this at selection negating the id of unselected successors and
842 // restricting topological pruning to positive ids.
843
844 int NId = N->getNodeId();
845 // If we Invalidated the Id, reconstruct original NId.
846 if (NId < -1)
847 NId = -(NId + 1);
848
849 bool Found = false;
850 while (!Worklist.empty()) {
851 const SDNode *M = Worklist.pop_back_val();
852 int MId = M->getNodeId();
853 if (TopologicalPrune && M->getOpcode() != ISD::TokenFactor && (NId > 0) &&
854 (MId > 0) && (MId < NId)) {
855 DeferredNodes.push_back(M);
856 continue;
857 }
858 for (const SDValue &OpV : M->op_values()) {
859 SDNode *Op = OpV.getNode();
860 if (Visited.insert(Op).second)
861 Worklist.push_back(Op);
862 if (Op == N)
863 Found = true;
864 }
865 if (Found)
866 break;
867 if (MaxSteps != 0 && Visited.size() >= MaxSteps)
868 break;
869 }
870 // Push deferred nodes back on worklist.
871 Worklist.append(DeferredNodes.begin(), DeferredNodes.end());
872 // If we bailed early, conservatively return found.
873 if (MaxSteps != 0 && Visited.size() >= MaxSteps)
874 return true;
875 return Found;
876 }
877
878 /// Return true if all the users of N are contained in Nodes.
879 /// NOTE: Requires at least one match, but doesn't require them all.
880 static bool areOnlyUsersOf(ArrayRef<const SDNode *> Nodes, const SDNode *N);
881
882 /// Return the number of values used by this operation.
883 unsigned getNumOperands() const { return NumOperands; }
884
885 /// Return the maximum number of operands that a SDNode can hold.
886 static constexpr size_t getMaxNumOperands() {
887 return std::numeric_limits<decltype(SDNode::NumOperands)>::max();
888 }
889
890 /// Helper method returns the integer value of a ConstantSDNode operand.
891 inline uint64_t getConstantOperandVal(unsigned Num) const;
892
893 /// Helper method returns the APInt of a ConstantSDNode operand.
894 inline const APInt &getConstantOperandAPInt(unsigned Num) const;
895
896 const SDValue &getOperand(unsigned Num) const {
897 assert(Num < NumOperands && "Invalid child # of SDNode!")((void)0);
898 return OperandList[Num];
899 }
900
901 using op_iterator = SDUse *;
902
903 op_iterator op_begin() const { return OperandList; }
904 op_iterator op_end() const { return OperandList+NumOperands; }
905 ArrayRef<SDUse> ops() const { return makeArrayRef(op_begin(), op_end()); }
906
907 /// Iterator for directly iterating over the operand SDValue's.
908 struct value_op_iterator
909 : iterator_adaptor_base<value_op_iterator, op_iterator,
910 std::random_access_iterator_tag, SDValue,
911 ptrdiff_t, value_op_iterator *,
912 value_op_iterator *> {
913 explicit value_op_iterator(SDUse *U = nullptr)
914 : iterator_adaptor_base(U) {}
915
916 const SDValue &operator*() const { return I->get(); }
917 };
918
919 iterator_range<value_op_iterator> op_values() const {
920 return make_range(value_op_iterator(op_begin()),
921 value_op_iterator(op_end()));
922 }
923
924 SDVTList getVTList() const {
925 SDVTList X = { ValueList, NumValues };
926 return X;
927 }
928
929 /// If this node has a glue operand, return the node
930 /// to which the glue operand points. Otherwise return NULL.
931 SDNode *getGluedNode() const {
932 if (getNumOperands() != 0 &&
933 getOperand(getNumOperands()-1).getValueType() == MVT::Glue)
934 return getOperand(getNumOperands()-1).getNode();
935 return nullptr;
936 }
937
938 /// If this node has a glue value with a user, return
939 /// the user (there is at most one). Otherwise return NULL.
940 SDNode *getGluedUser() const {
941 for (use_iterator UI = use_begin(), UE = use_end(); UI != UE; ++UI)
942 if (UI.getUse().get().getValueType() == MVT::Glue)
943 return *UI;
944 return nullptr;
945 }
946
947 SDNodeFlags getFlags() const { return Flags; }
948 void setFlags(SDNodeFlags NewFlags) { Flags = NewFlags; }
949
950 /// Clear any flags in this node that aren't also set in Flags.
951 /// If Flags is not in a defined state then this has no effect.
952 void intersectFlagsWith(const SDNodeFlags Flags);
953
954 /// Return the number of values defined/returned by this operator.
955 unsigned getNumValues() const { return NumValues; }
956
957 /// Return the type of a specified result.
958 EVT getValueType(unsigned ResNo) const {
959 assert(ResNo < NumValues && "Illegal result number!")((void)0);
960 return ValueList[ResNo];
961 }
962
963 /// Return the type of a specified result as a simple type.
964 MVT getSimpleValueType(unsigned ResNo) const {
965 return getValueType(ResNo).getSimpleVT();
966 }
967
968 /// Returns MVT::getSizeInBits(getValueType(ResNo)).
969 ///
970 /// If the value type is a scalable vector type, the scalable property will
971 /// be set and the runtime size will be a positive integer multiple of the
972 /// base size.
973 TypeSize getValueSizeInBits(unsigned ResNo) const {
974 return getValueType(ResNo).getSizeInBits();
975 }
976
977 using value_iterator = const EVT *;
978
979 value_iterator value_begin() const { return ValueList; }
980 value_iterator value_end() const { return ValueList+NumValues; }
981 iterator_range<value_iterator> values() const {
982 return llvm::make_range(value_begin(), value_end());
983 }
984
985 /// Return the opcode of this operation for printing.
986 std::string getOperationName(const SelectionDAG *G = nullptr) const;
987 static const char* getIndexedModeName(ISD::MemIndexedMode AM);
988 void print_types(raw_ostream &OS, const SelectionDAG *G) const;
989 void print_details(raw_ostream &OS, const SelectionDAG *G) const;
990 void print(raw_ostream &OS, const SelectionDAG *G = nullptr) const;
991 void printr(raw_ostream &OS, const SelectionDAG *G = nullptr) const;
992
993 /// Print a SelectionDAG node and all children down to
994 /// the leaves. The given SelectionDAG allows target-specific nodes
995 /// to be printed in human-readable form. Unlike printr, this will
996 /// print the whole DAG, including children that appear multiple
997 /// times.
998 ///
999 void printrFull(raw_ostream &O, const SelectionDAG *G = nullptr) const;
1000
1001 /// Print a SelectionDAG node and children up to
1002 /// depth "depth." The given SelectionDAG allows target-specific
1003 /// nodes to be printed in human-readable form. Unlike printr, this
1004 /// will print children that appear multiple times wherever they are
1005 /// used.
1006 ///
1007 void printrWithDepth(raw_ostream &O, const SelectionDAG *G = nullptr,
1008 unsigned depth = 100) const;
1009
1010 /// Dump this node, for debugging.
1011 void dump() const;
1012
1013 /// Dump (recursively) this node and its use-def subgraph.
1014 void dumpr() const;
1015
1016 /// Dump this node, for debugging.
1017 /// The given SelectionDAG allows target-specific nodes to be printed
1018 /// in human-readable form.
1019 void dump(const SelectionDAG *G) const;
1020
1021 /// Dump (recursively) this node and its use-def subgraph.
1022 /// The given SelectionDAG allows target-specific nodes to be printed
1023 /// in human-readable form.
1024 void dumpr(const SelectionDAG *G) const;
1025
1026 /// printrFull to dbgs(). The given SelectionDAG allows
1027 /// target-specific nodes to be printed in human-readable form.
1028 /// Unlike dumpr, this will print the whole DAG, including children
1029 /// that appear multiple times.
1030 void dumprFull(const SelectionDAG *G = nullptr) const;
1031
1032 /// printrWithDepth to dbgs(). The given
1033 /// SelectionDAG allows target-specific nodes to be printed in
1034 /// human-readable form. Unlike dumpr, this will print children
1035 /// that appear multiple times wherever they are used.
1036 ///
1037 void dumprWithDepth(const SelectionDAG *G = nullptr,
1038 unsigned depth = 100) const;
1039
1040 /// Gather unique data for the node.
1041 void Profile(FoldingSetNodeID &ID) const;
1042
1043 /// This method should only be used by the SDUse class.
1044 void addUse(SDUse &U) { U.addToList(&UseList); }
1045
1046protected:
1047 static SDVTList getSDVTList(EVT VT) {
1048 SDVTList Ret = { getValueTypeList(VT), 1 };
1049 return Ret;
1050 }
1051
1052 /// Create an SDNode.
1053 ///
1054 /// SDNodes are created without any operands, and never own the operand
1055 /// storage. To add operands, see SelectionDAG::createOperands.
1056 SDNode(unsigned Opc, unsigned Order, DebugLoc dl, SDVTList VTs)
1057 : NodeType(Opc), ValueList(VTs.VTs), NumValues(VTs.NumVTs),
1058 IROrder(Order), debugLoc(std::move(dl)) {
1059 memset(&RawSDNodeBits, 0, sizeof(RawSDNodeBits));
1060 assert(debugLoc.hasTrivialDestructor() && "Expected trivial destructor")((void)0);
1061 assert(NumValues == VTs.NumVTs &&((void)0)
1062 "NumValues wasn't wide enough for its operands!")((void)0);
1063 }
1064
1065 /// Release the operands and set this node to have zero operands.
1066 void DropOperands();
1067};
1068
1069/// Wrapper class for IR location info (IR ordering and DebugLoc) to be passed
1070/// into SDNode creation functions.
1071/// When an SDNode is created from the DAGBuilder, the DebugLoc is extracted
1072/// from the original Instruction, and IROrder is the ordinal position of
1073/// the instruction.
1074/// When an SDNode is created after the DAG is being built, both DebugLoc and
1075/// the IROrder are propagated from the original SDNode.
1076/// So SDLoc class provides two constructors besides the default one, one to
1077/// be used by the DAGBuilder, the other to be used by others.
1078class SDLoc {
1079private:
1080 DebugLoc DL;
1081 int IROrder = 0;
1082
1083public:
1084 SDLoc() = default;
1085 SDLoc(const SDNode *N) : DL(N->getDebugLoc()), IROrder(N->getIROrder()) {}
1086 SDLoc(const SDValue V) : SDLoc(V.getNode()) {}
1087 SDLoc(const Instruction *I, int Order) : IROrder(Order) {
1088 assert(Order >= 0 && "bad IROrder")((void)0);
1089 if (I)
1090 DL = I->getDebugLoc();
1091 }
1092
1093 unsigned getIROrder() const { return IROrder; }
1094 const DebugLoc &getDebugLoc() const { return DL; }
1095};
1096
1097// Define inline functions from the SDValue class.
1098
1099inline SDValue::SDValue(SDNode *node, unsigned resno)
1100 : Node(node), ResNo(resno) {
1101 // Explicitly check for !ResNo to avoid use-after-free, because there are
1102 // callers that use SDValue(N, 0) with a deleted N to indicate successful
1103 // combines.
1104 assert((!Node || !ResNo || ResNo < Node->getNumValues()) &&((void)0)
1105 "Invalid result number for the given node!")((void)0);
1106 assert(ResNo < -2U && "Cannot use result numbers reserved for DenseMaps.")((void)0);
1107}
1108
1109inline unsigned SDValue::getOpcode() const {
1110 return Node->getOpcode();
1111}
1112
1113inline EVT SDValue::getValueType() const {
1114 return Node->getValueType(ResNo);
11
←
Called C++ object pointer is null
1115}
1116
1117inline unsigned SDValue::getNumOperands() const {
1118 return Node->getNumOperands();
1119}
1120
1121inline const SDValue &SDValue::getOperand(unsigned i) const {
1122 return Node->getOperand(i);
1123}
1124
1125inline uint64_t SDValue::getConstantOperandVal(unsigned i) const {
1126 return Node->getConstantOperandVal(i);
1127}
1128
1129inline const APInt &SDValue::getConstantOperandAPInt(unsigned i) const {
1130 return Node->getConstantOperandAPInt(i);
1131}
1132
1133inline bool SDValue::isTargetOpcode() const {
1134 return Node->isTargetOpcode();
1135}
1136
1137inline bool SDValue::isTargetMemoryOpcode() const {
1138 return Node->isTargetMemoryOpcode();
1139}
1140
1141inline bool SDValue::isMachineOpcode() const {
1142 return Node->isMachineOpcode();
1143}
1144
1145inline unsigned SDValue::getMachineOpcode() const {
1146 return Node->getMachineOpcode();
1147}
1148