| File: | src/gnu/usr.bin/clang/libLLVM/../../../llvm/llvm/include/llvm/CodeGen/SelectionDAGNodes.h |
| Warning: | line 1158, column 10 Called C++ object pointer is null |
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| 1 | //===-- AMDGPUISelLowering.cpp - AMDGPU Common DAG lowering functions -----===// | |||
| 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 | /// \file | |||
| 10 | /// This is the parent TargetLowering class for hardware code gen | |||
| 11 | /// targets. | |||
| 12 | // | |||
| 13 | //===----------------------------------------------------------------------===// | |||
| 14 | ||||
| 15 | #include "AMDGPUISelLowering.h" | |||
| 16 | #include "AMDGPU.h" | |||
| 17 | #include "AMDGPUInstrInfo.h" | |||
| 18 | #include "AMDGPUMachineFunction.h" | |||
| 19 | #include "GCNSubtarget.h" | |||
| 20 | #include "SIMachineFunctionInfo.h" | |||
| 21 | #include "llvm/CodeGen/Analysis.h" | |||
| 22 | #include "llvm/IR/DiagnosticInfo.h" | |||
| 23 | #include "llvm/IR/IntrinsicsAMDGPU.h" | |||
| 24 | #include "llvm/Support/CommandLine.h" | |||
| 25 | #include "llvm/Support/KnownBits.h" | |||
| 26 | #include "llvm/Target/TargetMachine.h" | |||
| 27 | ||||
| 28 | using namespace llvm; | |||
| 29 | ||||
| 30 | #include "AMDGPUGenCallingConv.inc" | |||
| 31 | ||||
| 32 | static cl::opt<bool> AMDGPUBypassSlowDiv( | |||
| 33 | "amdgpu-bypass-slow-div", | |||
| 34 | cl::desc("Skip 64-bit divide for dynamic 32-bit values"), | |||
| 35 | cl::init(true)); | |||
| 36 | ||||
| 37 | // Find a larger type to do a load / store of a vector with. | |||
| 38 | EVT AMDGPUTargetLowering::getEquivalentMemType(LLVMContext &Ctx, EVT VT) { | |||
| 39 | unsigned StoreSize = VT.getStoreSizeInBits(); | |||
| 40 | if (StoreSize <= 32) | |||
| 41 | return EVT::getIntegerVT(Ctx, StoreSize); | |||
| 42 | ||||
| 43 | assert(StoreSize % 32 == 0 && "Store size not a multiple of 32")((void)0); | |||
| 44 | return EVT::getVectorVT(Ctx, MVT::i32, StoreSize / 32); | |||
| 45 | } | |||
| 46 | ||||
| 47 | unsigned AMDGPUTargetLowering::numBitsUnsigned(SDValue Op, SelectionDAG &DAG) { | |||
| 48 | EVT VT = Op.getValueType(); | |||
| 49 | KnownBits Known = DAG.computeKnownBits(Op); | |||
| 50 | return VT.getSizeInBits() - Known.countMinLeadingZeros(); | |||
| 51 | } | |||
| 52 | ||||
| 53 | unsigned AMDGPUTargetLowering::numBitsSigned(SDValue Op, SelectionDAG &DAG) { | |||
| 54 | EVT VT = Op.getValueType(); | |||
| 55 | ||||
| 56 | // In order for this to be a signed 24-bit value, bit 23, must | |||
| 57 | // be a sign bit. | |||
| 58 | return VT.getSizeInBits() - DAG.ComputeNumSignBits(Op); | |||
| 59 | } | |||
| 60 | ||||
| 61 | AMDGPUTargetLowering::AMDGPUTargetLowering(const TargetMachine &TM, | |||
| 62 | const AMDGPUSubtarget &STI) | |||
| 63 | : TargetLowering(TM), Subtarget(&STI) { | |||
| 64 | // Lower floating point store/load to integer store/load to reduce the number | |||
| 65 | // of patterns in tablegen. | |||
| 66 | setOperationAction(ISD::LOAD, MVT::f32, Promote); | |||
| 67 | AddPromotedToType(ISD::LOAD, MVT::f32, MVT::i32); | |||
| 68 | ||||
| 69 | setOperationAction(ISD::LOAD, MVT::v2f32, Promote); | |||
| 70 | AddPromotedToType(ISD::LOAD, MVT::v2f32, MVT::v2i32); | |||
| 71 | ||||
| 72 | setOperationAction(ISD::LOAD, MVT::v3f32, Promote); | |||
| 73 | AddPromotedToType(ISD::LOAD, MVT::v3f32, MVT::v3i32); | |||
| 74 | ||||
| 75 | setOperationAction(ISD::LOAD, MVT::v4f32, Promote); | |||
| 76 | AddPromotedToType(ISD::LOAD, MVT::v4f32, MVT::v4i32); | |||
| 77 | ||||
| 78 | setOperationAction(ISD::LOAD, MVT::v5f32, Promote); | |||
| 79 | AddPromotedToType(ISD::LOAD, MVT::v5f32, MVT::v5i32); | |||
| 80 | ||||
| 81 | setOperationAction(ISD::LOAD, MVT::v6f32, Promote); | |||
| 82 | AddPromotedToType(ISD::LOAD, MVT::v6f32, MVT::v6i32); | |||
| 83 | ||||
| 84 | setOperationAction(ISD::LOAD, MVT::v7f32, Promote); | |||
| 85 | AddPromotedToType(ISD::LOAD, MVT::v7f32, MVT::v7i32); | |||
| 86 | ||||
| 87 | setOperationAction(ISD::LOAD, MVT::v8f32, Promote); | |||
| 88 | AddPromotedToType(ISD::LOAD, MVT::v8f32, MVT::v8i32); | |||
| 89 | ||||
| 90 | setOperationAction(ISD::LOAD, MVT::v16f32, Promote); | |||
| 91 | AddPromotedToType(ISD::LOAD, MVT::v16f32, MVT::v16i32); | |||
| 92 | ||||
| 93 | setOperationAction(ISD::LOAD, MVT::v32f32, Promote); | |||
| 94 | AddPromotedToType(ISD::LOAD, MVT::v32f32, MVT::v32i32); | |||
| 95 | ||||
| 96 | setOperationAction(ISD::LOAD, MVT::i64, Promote); | |||
| 97 | AddPromotedToType(ISD::LOAD, MVT::i64, MVT::v2i32); | |||
| 98 | ||||
| 99 | setOperationAction(ISD::LOAD, MVT::v2i64, Promote); | |||
| 100 | AddPromotedToType(ISD::LOAD, MVT::v2i64, MVT::v4i32); | |||
| 101 | ||||
| 102 | setOperationAction(ISD::LOAD, MVT::f64, Promote); | |||
| 103 | AddPromotedToType(ISD::LOAD, MVT::f64, MVT::v2i32); | |||
| 104 | ||||
| 105 | setOperationAction(ISD::LOAD, MVT::v2f64, Promote); | |||
| 106 | AddPromotedToType(ISD::LOAD, MVT::v2f64, MVT::v4i32); | |||
| 107 | ||||
| 108 | setOperationAction(ISD::LOAD, MVT::v3i64, Promote); | |||
| 109 | AddPromotedToType(ISD::LOAD, MVT::v3i64, MVT::v6i32); | |||
| 110 | ||||
| 111 | setOperationAction(ISD::LOAD, MVT::v4i64, Promote); | |||
| 112 | AddPromotedToType(ISD::LOAD, MVT::v4i64, MVT::v8i32); | |||
| 113 | ||||
| 114 | setOperationAction(ISD::LOAD, MVT::v3f64, Promote); | |||
| 115 | AddPromotedToType(ISD::LOAD, MVT::v3f64, MVT::v6i32); | |||
| 116 | ||||
| 117 | setOperationAction(ISD::LOAD, MVT::v4f64, Promote); | |||
| 118 | AddPromotedToType(ISD::LOAD, MVT::v4f64, MVT::v8i32); | |||
| 119 | ||||
| 120 | setOperationAction(ISD::LOAD, MVT::v8i64, Promote); | |||
| 121 | AddPromotedToType(ISD::LOAD, MVT::v8i64, MVT::v16i32); | |||
| 122 | ||||
| 123 | setOperationAction(ISD::LOAD, MVT::v8f64, Promote); | |||
| 124 | AddPromotedToType(ISD::LOAD, MVT::v8f64, MVT::v16i32); | |||
| 125 | ||||
| 126 | setOperationAction(ISD::LOAD, MVT::v16i64, Promote); | |||
| 127 | AddPromotedToType(ISD::LOAD, MVT::v16i64, MVT::v32i32); | |||
| 128 | ||||
| 129 | setOperationAction(ISD::LOAD, MVT::v16f64, Promote); | |||
| 130 | AddPromotedToType(ISD::LOAD, MVT::v16f64, MVT::v32i32); | |||
| 131 | ||||
| 132 | // There are no 64-bit extloads. These should be done as a 32-bit extload and | |||
| 133 | // an extension to 64-bit. | |||
| 134 | for (MVT VT : MVT::integer_valuetypes()) { | |||
| 135 | setLoadExtAction(ISD::EXTLOAD, MVT::i64, VT, Expand); | |||
| 136 | setLoadExtAction(ISD::SEXTLOAD, MVT::i64, VT, Expand); | |||
| 137 | setLoadExtAction(ISD::ZEXTLOAD, MVT::i64, VT, Expand); | |||
| 138 | } | |||
| 139 | ||||
| 140 | for (MVT VT : MVT::integer_valuetypes()) { | |||
| 141 | if (VT == MVT::i64) | |||
| 142 | continue; | |||
| 143 | ||||
| 144 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote); | |||
| 145 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i8, Legal); | |||
| 146 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i16, Legal); | |||
| 147 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i32, Expand); | |||
| 148 | ||||
| 149 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i1, Promote); | |||
| 150 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i8, Legal); | |||
| 151 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i16, Legal); | |||
| 152 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i32, Expand); | |||
| 153 | ||||
| 154 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::i1, Promote); | |||
| 155 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::i8, Legal); | |||
| 156 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::i16, Legal); | |||
| 157 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::i32, Expand); | |||
| 158 | } | |||
| 159 | ||||
| 160 | for (MVT VT : MVT::integer_fixedlen_vector_valuetypes()) { | |||
| 161 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::v2i8, Expand); | |||
| 162 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v2i8, Expand); | |||
| 163 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v2i8, Expand); | |||
| 164 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::v4i8, Expand); | |||
| 165 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v4i8, Expand); | |||
| 166 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v4i8, Expand); | |||
| 167 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::v2i16, Expand); | |||
| 168 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v2i16, Expand); | |||
| 169 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v2i16, Expand); | |||
| 170 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::v3i16, Expand); | |||
| 171 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v3i16, Expand); | |||
| 172 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v3i16, Expand); | |||
| 173 | setLoadExtAction(ISD::EXTLOAD, VT, MVT::v4i16, Expand); | |||
| 174 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::v4i16, Expand); | |||
| 175 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::v4i16, Expand); | |||
| 176 | } | |||
| 177 | ||||
| 178 | setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Expand); | |||
| 179 | setLoadExtAction(ISD::EXTLOAD, MVT::v2f32, MVT::v2f16, Expand); | |||
| 180 | setLoadExtAction(ISD::EXTLOAD, MVT::v3f32, MVT::v3f16, Expand); | |||
| 181 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f32, MVT::v4f16, Expand); | |||
| 182 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f32, MVT::v8f16, Expand); | |||
| 183 | setLoadExtAction(ISD::EXTLOAD, MVT::v16f32, MVT::v16f16, Expand); | |||
| 184 | setLoadExtAction(ISD::EXTLOAD, MVT::v32f32, MVT::v32f16, Expand); | |||
| 185 | ||||
| 186 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f32, Expand); | |||
| 187 | setLoadExtAction(ISD::EXTLOAD, MVT::v2f64, MVT::v2f32, Expand); | |||
| 188 | setLoadExtAction(ISD::EXTLOAD, MVT::v3f64, MVT::v3f32, Expand); | |||
| 189 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f64, MVT::v4f32, Expand); | |||
| 190 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f64, MVT::v8f32, Expand); | |||
| 191 | setLoadExtAction(ISD::EXTLOAD, MVT::v16f64, MVT::v16f32, Expand); | |||
| 192 | ||||
| 193 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Expand); | |||
| 194 | setLoadExtAction(ISD::EXTLOAD, MVT::v2f64, MVT::v2f16, Expand); | |||
| 195 | setLoadExtAction(ISD::EXTLOAD, MVT::v3f64, MVT::v3f16, Expand); | |||
| 196 | setLoadExtAction(ISD::EXTLOAD, MVT::v4f64, MVT::v4f16, Expand); | |||
| 197 | setLoadExtAction(ISD::EXTLOAD, MVT::v8f64, MVT::v8f16, Expand); | |||
| 198 | setLoadExtAction(ISD::EXTLOAD, MVT::v16f64, MVT::v16f16, Expand); | |||
| 199 | ||||
| 200 | setOperationAction(ISD::STORE, MVT::f32, Promote); | |||
| 201 | AddPromotedToType(ISD::STORE, MVT::f32, MVT::i32); | |||
| 202 | ||||
| 203 | setOperationAction(ISD::STORE, MVT::v2f32, Promote); | |||
| 204 | AddPromotedToType(ISD::STORE, MVT::v2f32, MVT::v2i32); | |||
| 205 | ||||
| 206 | setOperationAction(ISD::STORE, MVT::v3f32, Promote); | |||
| 207 | AddPromotedToType(ISD::STORE, MVT::v3f32, MVT::v3i32); | |||
| 208 | ||||
| 209 | setOperationAction(ISD::STORE, MVT::v4f32, Promote); | |||
| 210 | AddPromotedToType(ISD::STORE, MVT::v4f32, MVT::v4i32); | |||
| 211 | ||||
| 212 | setOperationAction(ISD::STORE, MVT::v5f32, Promote); | |||
| 213 | AddPromotedToType(ISD::STORE, MVT::v5f32, MVT::v5i32); | |||
| 214 | ||||
| 215 | setOperationAction(ISD::STORE, MVT::v6f32, Promote); | |||
| 216 | AddPromotedToType(ISD::STORE, MVT::v6f32, MVT::v6i32); | |||
| 217 | ||||
| 218 | setOperationAction(ISD::STORE, MVT::v7f32, Promote); | |||
| 219 | AddPromotedToType(ISD::STORE, MVT::v7f32, MVT::v7i32); | |||
| 220 | ||||
| 221 | setOperationAction(ISD::STORE, MVT::v8f32, Promote); | |||
| 222 | AddPromotedToType(ISD::STORE, MVT::v8f32, MVT::v8i32); | |||
| 223 | ||||
| 224 | setOperationAction(ISD::STORE, MVT::v16f32, Promote); | |||
| 225 | AddPromotedToType(ISD::STORE, MVT::v16f32, MVT::v16i32); | |||
| 226 | ||||
| 227 | setOperationAction(ISD::STORE, MVT::v32f32, Promote); | |||
| 228 | AddPromotedToType(ISD::STORE, MVT::v32f32, MVT::v32i32); | |||
| 229 | ||||
| 230 | setOperationAction(ISD::STORE, MVT::i64, Promote); | |||
| 231 | AddPromotedToType(ISD::STORE, MVT::i64, MVT::v2i32); | |||
| 232 | ||||
| 233 | setOperationAction(ISD::STORE, MVT::v2i64, Promote); | |||
| 234 | AddPromotedToType(ISD::STORE, MVT::v2i64, MVT::v4i32); | |||
| 235 | ||||
| 236 | setOperationAction(ISD::STORE, MVT::f64, Promote); | |||
| 237 | AddPromotedToType(ISD::STORE, MVT::f64, MVT::v2i32); | |||
| 238 | ||||
| 239 | setOperationAction(ISD::STORE, MVT::v2f64, Promote); | |||
| 240 | AddPromotedToType(ISD::STORE, MVT::v2f64, MVT::v4i32); | |||
| 241 | ||||
| 242 | setOperationAction(ISD::STORE, MVT::v3i64, Promote); | |||
| 243 | AddPromotedToType(ISD::STORE, MVT::v3i64, MVT::v6i32); | |||
| 244 | ||||
| 245 | setOperationAction(ISD::STORE, MVT::v3f64, Promote); | |||
| 246 | AddPromotedToType(ISD::STORE, MVT::v3f64, MVT::v6i32); | |||
| 247 | ||||
| 248 | setOperationAction(ISD::STORE, MVT::v4i64, Promote); | |||
| 249 | AddPromotedToType(ISD::STORE, MVT::v4i64, MVT::v8i32); | |||
| 250 | ||||
| 251 | setOperationAction(ISD::STORE, MVT::v4f64, Promote); | |||
| 252 | AddPromotedToType(ISD::STORE, MVT::v4f64, MVT::v8i32); | |||
| 253 | ||||
| 254 | setOperationAction(ISD::STORE, MVT::v8i64, Promote); | |||
| 255 | AddPromotedToType(ISD::STORE, MVT::v8i64, MVT::v16i32); | |||
| 256 | ||||
| 257 | setOperationAction(ISD::STORE, MVT::v8f64, Promote); | |||
| 258 | AddPromotedToType(ISD::STORE, MVT::v8f64, MVT::v16i32); | |||
| 259 | ||||
| 260 | setOperationAction(ISD::STORE, MVT::v16i64, Promote); | |||
| 261 | AddPromotedToType(ISD::STORE, MVT::v16i64, MVT::v32i32); | |||
| 262 | ||||
| 263 | setOperationAction(ISD::STORE, MVT::v16f64, Promote); | |||
| 264 | AddPromotedToType(ISD::STORE, MVT::v16f64, MVT::v32i32); | |||
| 265 | ||||
| 266 | setTruncStoreAction(MVT::i64, MVT::i1, Expand); | |||
| 267 | setTruncStoreAction(MVT::i64, MVT::i8, Expand); | |||
| 268 | setTruncStoreAction(MVT::i64, MVT::i16, Expand); | |||
| 269 | setTruncStoreAction(MVT::i64, MVT::i32, Expand); | |||
| 270 | ||||
| 271 | setTruncStoreAction(MVT::v2i64, MVT::v2i1, Expand); | |||
| 272 | setTruncStoreAction(MVT::v2i64, MVT::v2i8, Expand); | |||
| 273 | setTruncStoreAction(MVT::v2i64, MVT::v2i16, Expand); | |||
| 274 | setTruncStoreAction(MVT::v2i64, MVT::v2i32, Expand); | |||
| 275 | ||||
| 276 | setTruncStoreAction(MVT::f32, MVT::f16, Expand); | |||
| 277 | setTruncStoreAction(MVT::v2f32, MVT::v2f16, Expand); | |||
| 278 | setTruncStoreAction(MVT::v3f32, MVT::v3f16, Expand); | |||
| 279 | setTruncStoreAction(MVT::v4f32, MVT::v4f16, Expand); | |||
| 280 | setTruncStoreAction(MVT::v8f32, MVT::v8f16, Expand); | |||
| 281 | setTruncStoreAction(MVT::v16f32, MVT::v16f16, Expand); | |||
| 282 | setTruncStoreAction(MVT::v32f32, MVT::v32f16, Expand); | |||
| 283 | ||||
| 284 | setTruncStoreAction(MVT::f64, MVT::f16, Expand); | |||
| 285 | setTruncStoreAction(MVT::f64, MVT::f32, Expand); | |||
| 286 | ||||
| 287 | setTruncStoreAction(MVT::v2f64, MVT::v2f32, Expand); | |||
| 288 | setTruncStoreAction(MVT::v2f64, MVT::v2f16, Expand); | |||
| 289 | ||||
| 290 | setTruncStoreAction(MVT::v3i64, MVT::v3i32, Expand); | |||
| 291 | setTruncStoreAction(MVT::v3i64, MVT::v3i16, Expand); | |||
| 292 | setTruncStoreAction(MVT::v3f64, MVT::v3f32, Expand); | |||
| 293 | setTruncStoreAction(MVT::v3f64, MVT::v3f16, Expand); | |||
| 294 | ||||
| 295 | setTruncStoreAction(MVT::v4i64, MVT::v4i32, Expand); | |||
| 296 | setTruncStoreAction(MVT::v4i64, MVT::v4i16, Expand); | |||
| 297 | setTruncStoreAction(MVT::v4f64, MVT::v4f32, Expand); | |||
| 298 | setTruncStoreAction(MVT::v4f64, MVT::v4f16, Expand); | |||
| 299 | ||||
| 300 | setTruncStoreAction(MVT::v8f64, MVT::v8f32, Expand); | |||
| 301 | setTruncStoreAction(MVT::v8f64, MVT::v8f16, Expand); | |||
| 302 | ||||
| 303 | setTruncStoreAction(MVT::v16f64, MVT::v16f32, Expand); | |||
| 304 | setTruncStoreAction(MVT::v16f64, MVT::v16f16, Expand); | |||
| 305 | setTruncStoreAction(MVT::v16i64, MVT::v16i16, Expand); | |||
| 306 | setTruncStoreAction(MVT::v16i64, MVT::v16i16, Expand); | |||
| 307 | setTruncStoreAction(MVT::v16i64, MVT::v16i8, Expand); | |||
| 308 | setTruncStoreAction(MVT::v16i64, MVT::v16i8, Expand); | |||
| 309 | setTruncStoreAction(MVT::v16i64, MVT::v16i1, Expand); | |||
| 310 | ||||
| 311 | setOperationAction(ISD::Constant, MVT::i32, Legal); | |||
| 312 | setOperationAction(ISD::Constant, MVT::i64, Legal); | |||
| 313 | setOperationAction(ISD::ConstantFP, MVT::f32, Legal); | |||
| 314 | setOperationAction(ISD::ConstantFP, MVT::f64, Legal); | |||
| 315 | ||||
| 316 | setOperationAction(ISD::BR_JT, MVT::Other, Expand); | |||
| 317 | setOperationAction(ISD::BRIND, MVT::Other, Expand); | |||
| 318 | ||||
| 319 | // This is totally unsupported, just custom lower to produce an error. | |||
| 320 | setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom); | |||
| 321 | ||||
| 322 | // Library functions. These default to Expand, but we have instructions | |||
| 323 | // for them. | |||
| 324 | setOperationAction(ISD::FCEIL, MVT::f32, Legal); | |||
| 325 | setOperationAction(ISD::FEXP2, MVT::f32, Legal); | |||
| 326 | setOperationAction(ISD::FPOW, MVT::f32, Legal); | |||
| 327 | setOperationAction(ISD::FLOG2, MVT::f32, Legal); | |||
| 328 | setOperationAction(ISD::FABS, MVT::f32, Legal); | |||
| 329 | setOperationAction(ISD::FFLOOR, MVT::f32, Legal); | |||
| 330 | setOperationAction(ISD::FRINT, MVT::f32, Legal); | |||
| 331 | setOperationAction(ISD::FTRUNC, MVT::f32, Legal); | |||
| 332 | setOperationAction(ISD::FMINNUM, MVT::f32, Legal); | |||
| 333 | setOperationAction(ISD::FMAXNUM, MVT::f32, Legal); | |||
| 334 | ||||
| 335 | setOperationAction(ISD::FROUND, MVT::f32, Custom); | |||
| 336 | setOperationAction(ISD::FROUND, MVT::f64, Custom); | |||
| 337 | ||||
| 338 | setOperationAction(ISD::FLOG, MVT::f32, Custom); | |||
| 339 | setOperationAction(ISD::FLOG10, MVT::f32, Custom); | |||
| 340 | setOperationAction(ISD::FEXP, MVT::f32, Custom); | |||
| 341 | ||||
| 342 | ||||
| 343 | setOperationAction(ISD::FNEARBYINT, MVT::f32, Custom); | |||
| 344 | setOperationAction(ISD::FNEARBYINT, MVT::f64, Custom); | |||
| 345 | ||||
| 346 | setOperationAction(ISD::FREM, MVT::f16, Custom); | |||
| 347 | setOperationAction(ISD::FREM, MVT::f32, Custom); | |||
| 348 | setOperationAction(ISD::FREM, MVT::f64, Custom); | |||
| 349 | ||||
| 350 | // Expand to fneg + fadd. | |||
| 351 | setOperationAction(ISD::FSUB, MVT::f64, Expand); | |||
| 352 | ||||
| 353 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v3i32, Custom); | |||
| 354 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v3f32, Custom); | |||
| 355 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom); | |||
| 356 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f32, Custom); | |||
| 357 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v5i32, Custom); | |||
| 358 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v5f32, Custom); | |||
| 359 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v6i32, Custom); | |||
| 360 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v6f32, Custom); | |||
| 361 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v7i32, Custom); | |||
| 362 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v7f32, Custom); | |||
| 363 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v8i32, Custom); | |||
| 364 | setOperationAction(ISD::CONCAT_VECTORS, MVT::v8f32, Custom); | |||
| 365 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f16, Custom); | |||
| 366 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i16, Custom); | |||
| 367 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f32, Custom); | |||
| 368 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i32, Custom); | |||
| 369 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v3f32, Custom); | |||
| 370 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v3i32, Custom); | |||
| 371 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4f32, Custom); | |||
| 372 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4i32, Custom); | |||
| 373 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v5f32, Custom); | |||
| 374 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v5i32, Custom); | |||
| 375 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v6f32, Custom); | |||
| 376 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v6i32, Custom); | |||
| 377 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v7f32, Custom); | |||
| 378 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v7i32, Custom); | |||
| 379 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f32, Custom); | |||
| 380 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8i32, Custom); | |||
| 381 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v16f32, Custom); | |||
| 382 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v16i32, Custom); | |||
| 383 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v32f32, Custom); | |||
| 384 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v32i32, Custom); | |||
| 385 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f64, Custom); | |||
| 386 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i64, Custom); | |||
| 387 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v3f64, Custom); | |||
| 388 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v3i64, Custom); | |||
| 389 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4f64, Custom); | |||
| 390 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v4i64, Custom); | |||
| 391 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8f64, Custom); | |||
| 392 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v8i64, Custom); | |||
| 393 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v16f64, Custom); | |||
| 394 | setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v16i64, Custom); | |||
| 395 | ||||
| 396 | setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand); | |||
| 397 | setOperationAction(ISD::FP_TO_FP16, MVT::f64, Custom); | |||
| 398 | setOperationAction(ISD::FP_TO_FP16, MVT::f32, Custom); | |||
| 399 | ||||
| 400 | const MVT ScalarIntVTs[] = { MVT::i32, MVT::i64 }; | |||
| 401 | for (MVT VT : ScalarIntVTs) { | |||
| 402 | // These should use [SU]DIVREM, so set them to expand | |||
| 403 | setOperationAction(ISD::SDIV, VT, Expand); | |||
| 404 | setOperationAction(ISD::UDIV, VT, Expand); | |||
| 405 | setOperationAction(ISD::SREM, VT, Expand); | |||
| 406 | setOperationAction(ISD::UREM, VT, Expand); | |||
| 407 | ||||
| 408 | // GPU does not have divrem function for signed or unsigned. | |||
| 409 | setOperationAction(ISD::SDIVREM, VT, Custom); | |||
| 410 | setOperationAction(ISD::UDIVREM, VT, Custom); | |||
| 411 | ||||
| 412 | // GPU does not have [S|U]MUL_LOHI functions as a single instruction. | |||
| 413 | setOperationAction(ISD::SMUL_LOHI, VT, Expand); | |||
| 414 | setOperationAction(ISD::UMUL_LOHI, VT, Expand); | |||
| 415 | ||||
| 416 | setOperationAction(ISD::BSWAP, VT, Expand); | |||
| 417 | setOperationAction(ISD::CTTZ, VT, Expand); | |||
| 418 | setOperationAction(ISD::CTLZ, VT, Expand); | |||
| 419 | ||||
| 420 | // AMDGPU uses ADDC/SUBC/ADDE/SUBE | |||
| 421 | setOperationAction(ISD::ADDC, VT, Legal); | |||
| 422 | setOperationAction(ISD::SUBC, VT, Legal); | |||
| 423 | setOperationAction(ISD::ADDE, VT, Legal); | |||
| 424 | setOperationAction(ISD::SUBE, VT, Legal); | |||
| 425 | } | |||
| 426 | ||||
| 427 | // The hardware supports 32-bit FSHR, but not FSHL. | |||
| 428 | setOperationAction(ISD::FSHR, MVT::i32, Legal); | |||
| 429 | ||||
| 430 | // The hardware supports 32-bit ROTR, but not ROTL. | |||
| 431 | setOperationAction(ISD::ROTL, MVT::i32, Expand); | |||
| 432 | setOperationAction(ISD::ROTL, MVT::i64, Expand); | |||
| 433 | setOperationAction(ISD::ROTR, MVT::i64, Expand); | |||
| 434 | ||||
| 435 | setOperationAction(ISD::MULHU, MVT::i16, Expand); | |||
| 436 | setOperationAction(ISD::MULHS, MVT::i16, Expand); | |||
| 437 | ||||
| 438 | setOperationAction(ISD::MUL, MVT::i64, Expand); | |||
| 439 | setOperationAction(ISD::MULHU, MVT::i64, Expand); | |||
| 440 | setOperationAction(ISD::MULHS, MVT::i64, Expand); | |||
| 441 | setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom); | |||
| 442 | setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom); | |||
| 443 | setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom); | |||
| 444 | setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom); | |||
| 445 | setOperationAction(ISD::SELECT_CC, MVT::i64, Expand); | |||
| 446 | ||||
| 447 | setOperationAction(ISD::SMIN, MVT::i32, Legal); | |||
| 448 | setOperationAction(ISD::UMIN, MVT::i32, Legal); | |||
| 449 | setOperationAction(ISD::SMAX, MVT::i32, Legal); | |||
| 450 | setOperationAction(ISD::UMAX, MVT::i32, Legal); | |||
| 451 | ||||
| 452 | setOperationAction(ISD::CTTZ, MVT::i64, Custom); | |||
| 453 | setOperationAction(ISD::CTTZ_ZERO_UNDEF, MVT::i64, Custom); | |||
| 454 | setOperationAction(ISD::CTLZ, MVT::i64, Custom); | |||
| 455 | setOperationAction(ISD::CTLZ_ZERO_UNDEF, MVT::i64, Custom); | |||
| 456 | ||||
| 457 | static const MVT::SimpleValueType VectorIntTypes[] = { | |||
| 458 | MVT::v2i32, MVT::v3i32, MVT::v4i32, MVT::v5i32, MVT::v6i32, MVT::v7i32}; | |||
| 459 | ||||
| 460 | for (MVT VT : VectorIntTypes) { | |||
| 461 | // Expand the following operations for the current type by default. | |||
| 462 | setOperationAction(ISD::ADD, VT, Expand); | |||
| 463 | setOperationAction(ISD::AND, VT, Expand); | |||
| 464 | setOperationAction(ISD::FP_TO_SINT, VT, Expand); | |||
| 465 | setOperationAction(ISD::FP_TO_UINT, VT, Expand); | |||
| 466 | setOperationAction(ISD::MUL, VT, Expand); | |||
| 467 | setOperationAction(ISD::MULHU, VT, Expand); | |||
| 468 | setOperationAction(ISD::MULHS, VT, Expand); | |||
| 469 | setOperationAction(ISD::OR, VT, Expand); | |||
| 470 | setOperationAction(ISD::SHL, VT, Expand); | |||
| 471 | setOperationAction(ISD::SRA, VT, Expand); | |||
| 472 | setOperationAction(ISD::SRL, VT, Expand); | |||
| 473 | setOperationAction(ISD::ROTL, VT, Expand); | |||
| 474 | setOperationAction(ISD::ROTR, VT, Expand); | |||
| 475 | setOperationAction(ISD::SUB, VT, Expand); | |||
| 476 | setOperationAction(ISD::SINT_TO_FP, VT, Expand); | |||
| 477 | setOperationAction(ISD::UINT_TO_FP, VT, Expand); | |||
| 478 | setOperationAction(ISD::SDIV, VT, Expand); | |||
| 479 | setOperationAction(ISD::UDIV, VT, Expand); | |||
| 480 | setOperationAction(ISD::SREM, VT, Expand); | |||
| 481 | setOperationAction(ISD::UREM, VT, Expand); | |||
| 482 | setOperationAction(ISD::SMUL_LOHI, VT, Expand); | |||
| 483 | setOperationAction(ISD::UMUL_LOHI, VT, Expand); | |||
| 484 | setOperationAction(ISD::SDIVREM, VT, Expand); | |||
| 485 | setOperationAction(ISD::UDIVREM, VT, Expand); | |||
| 486 | setOperationAction(ISD::SELECT, VT, Expand); | |||
| 487 | setOperationAction(ISD::VSELECT, VT, Expand); | |||
| 488 | setOperationAction(ISD::SELECT_CC, VT, Expand); | |||
| 489 | setOperationAction(ISD::XOR, VT, Expand); | |||
| 490 | setOperationAction(ISD::BSWAP, VT, Expand); | |||
| 491 | setOperationAction(ISD::CTPOP, VT, Expand); | |||
| 492 | setOperationAction(ISD::CTTZ, VT, Expand); | |||
| 493 | setOperationAction(ISD::CTLZ, VT, Expand); | |||
| 494 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand); | |||
| 495 | setOperationAction(ISD::SETCC, VT, Expand); | |||
| 496 | } | |||
| 497 | ||||
| 498 | static const MVT::SimpleValueType FloatVectorTypes[] = { | |||
| 499 | MVT::v2f32, MVT::v3f32, MVT::v4f32, MVT::v5f32, MVT::v6f32, MVT::v7f32}; | |||
| 500 | ||||
| 501 | for (MVT VT : FloatVectorTypes) { | |||
| 502 | setOperationAction(ISD::FABS, VT, Expand); | |||
| 503 | setOperationAction(ISD::FMINNUM, VT, Expand); | |||
| 504 | setOperationAction(ISD::FMAXNUM, VT, Expand); | |||
| 505 | setOperationAction(ISD::FADD, VT, Expand); | |||
| 506 | setOperationAction(ISD::FCEIL, VT, Expand); | |||
| 507 | setOperationAction(ISD::FCOS, VT, Expand); | |||
| 508 | setOperationAction(ISD::FDIV, VT, Expand); | |||
| 509 | setOperationAction(ISD::FEXP2, VT, Expand); | |||
| 510 | setOperationAction(ISD::FEXP, VT, Expand); | |||
| 511 | setOperationAction(ISD::FLOG2, VT, Expand); | |||
| 512 | setOperationAction(ISD::FREM, VT, Expand); | |||
| 513 | setOperationAction(ISD::FLOG, VT, Expand); | |||
| 514 | setOperationAction(ISD::FLOG10, VT, Expand); | |||
| 515 | setOperationAction(ISD::FPOW, VT, Expand); | |||
| 516 | setOperationAction(ISD::FFLOOR, VT, Expand); | |||
| 517 | setOperationAction(ISD::FTRUNC, VT, Expand); | |||
| 518 | setOperationAction(ISD::FMUL, VT, Expand); | |||
| 519 | setOperationAction(ISD::FMA, VT, Expand); | |||
| 520 | setOperationAction(ISD::FRINT, VT, Expand); | |||
| 521 | setOperationAction(ISD::FNEARBYINT, VT, Expand); | |||
| 522 | setOperationAction(ISD::FSQRT, VT, Expand); | |||
| 523 | setOperationAction(ISD::FSIN, VT, Expand); | |||
| 524 | setOperationAction(ISD::FSUB, VT, Expand); | |||
| 525 | setOperationAction(ISD::FNEG, VT, Expand); | |||
| 526 | setOperationAction(ISD::VSELECT, VT, Expand); | |||
| 527 | setOperationAction(ISD::SELECT_CC, VT, Expand); | |||
| 528 | setOperationAction(ISD::FCOPYSIGN, VT, Expand); | |||
| 529 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Expand); | |||
| 530 | setOperationAction(ISD::SETCC, VT, Expand); | |||
| 531 | setOperationAction(ISD::FCANONICALIZE, VT, Expand); | |||
| 532 | } | |||
| 533 | ||||
| 534 | // This causes using an unrolled select operation rather than expansion with | |||
| 535 | // bit operations. This is in general better, but the alternative using BFI | |||
| 536 | // instructions may be better if the select sources are SGPRs. | |||
| 537 | setOperationAction(ISD::SELECT, MVT::v2f32, Promote); | |||
| 538 | AddPromotedToType(ISD::SELECT, MVT::v2f32, MVT::v2i32); | |||
| 539 | ||||
| 540 | setOperationAction(ISD::SELECT, MVT::v3f32, Promote); | |||
| 541 | AddPromotedToType(ISD::SELECT, MVT::v3f32, MVT::v3i32); | |||
| 542 | ||||
| 543 | setOperationAction(ISD::SELECT, MVT::v4f32, Promote); | |||
| 544 | AddPromotedToType(ISD::SELECT, MVT::v4f32, MVT::v4i32); | |||
| 545 | ||||
| 546 | setOperationAction(ISD::SELECT, MVT::v5f32, Promote); | |||
| 547 | AddPromotedToType(ISD::SELECT, MVT::v5f32, MVT::v5i32); | |||
| 548 | ||||
| 549 | setOperationAction(ISD::SELECT, MVT::v6f32, Promote); | |||
| 550 | AddPromotedToType(ISD::SELECT, MVT::v6f32, MVT::v6i32); | |||
| 551 | ||||
| 552 | setOperationAction(ISD::SELECT, MVT::v7f32, Promote); | |||
| 553 | AddPromotedToType(ISD::SELECT, MVT::v7f32, MVT::v7i32); | |||
| 554 | ||||
| 555 | // There are no libcalls of any kind. | |||
| 556 | for (int I = 0; I < RTLIB::UNKNOWN_LIBCALL; ++I) | |||
| 557 | setLibcallName(static_cast<RTLIB::Libcall>(I), nullptr); | |||
| 558 | ||||
| 559 | setSchedulingPreference(Sched::RegPressure); | |||
| 560 | setJumpIsExpensive(true); | |||
| 561 | ||||
| 562 | // FIXME: This is only partially true. If we have to do vector compares, any | |||
| 563 | // SGPR pair can be a condition register. If we have a uniform condition, we | |||
| 564 | // are better off doing SALU operations, where there is only one SCC. For now, | |||
| 565 | // we don't have a way of knowing during instruction selection if a condition | |||
| 566 | // will be uniform and we always use vector compares. Assume we are using | |||
| 567 | // vector compares until that is fixed. | |||
| 568 | setHasMultipleConditionRegisters(true); | |||
| 569 | ||||
| 570 | setMinCmpXchgSizeInBits(32); | |||
| 571 | setSupportsUnalignedAtomics(false); | |||
| 572 | ||||
| 573 | PredictableSelectIsExpensive = false; | |||
| 574 | ||||
| 575 | // We want to find all load dependencies for long chains of stores to enable | |||
| 576 | // merging into very wide vectors. The problem is with vectors with > 4 | |||
| 577 | // elements. MergeConsecutiveStores will attempt to merge these because x8/x16 | |||
| 578 | // vectors are a legal type, even though we have to split the loads | |||
| 579 | // usually. When we can more precisely specify load legality per address | |||
| 580 | // space, we should be able to make FindBetterChain/MergeConsecutiveStores | |||
| 581 | // smarter so that they can figure out what to do in 2 iterations without all | |||
| 582 | // N > 4 stores on the same chain. | |||
| 583 | GatherAllAliasesMaxDepth = 16; | |||
| 584 | ||||
| 585 | // memcpy/memmove/memset are expanded in the IR, so we shouldn't need to worry | |||
| 586 | // about these during lowering. | |||
| 587 | MaxStoresPerMemcpy = 0xffffffff; | |||
| 588 | MaxStoresPerMemmove = 0xffffffff; | |||
| 589 | MaxStoresPerMemset = 0xffffffff; | |||
| 590 | ||||
| 591 | // The expansion for 64-bit division is enormous. | |||
| 592 | if (AMDGPUBypassSlowDiv) | |||
| 593 | addBypassSlowDiv(64, 32); | |||
| 594 | ||||
| 595 | setTargetDAGCombine(ISD::BITCAST); | |||
| 596 | setTargetDAGCombine(ISD::SHL); | |||
| 597 | setTargetDAGCombine(ISD::SRA); | |||
| 598 | setTargetDAGCombine(ISD::SRL); | |||
| 599 | setTargetDAGCombine(ISD::TRUNCATE); | |||
| 600 | setTargetDAGCombine(ISD::MUL); | |||
| 601 | setTargetDAGCombine(ISD::MULHU); | |||
| 602 | setTargetDAGCombine(ISD::MULHS); | |||
| 603 | setTargetDAGCombine(ISD::SELECT); | |||
| 604 | setTargetDAGCombine(ISD::SELECT_CC); | |||
| 605 | setTargetDAGCombine(ISD::STORE); | |||
| 606 | setTargetDAGCombine(ISD::FADD); | |||
| 607 | setTargetDAGCombine(ISD::FSUB); | |||
| 608 | setTargetDAGCombine(ISD::FNEG); | |||
| 609 | setTargetDAGCombine(ISD::FABS); | |||
| 610 | setTargetDAGCombine(ISD::AssertZext); | |||
| 611 | setTargetDAGCombine(ISD::AssertSext); | |||
| 612 | setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN); | |||
| 613 | } | |||
| 614 | ||||
| 615 | bool AMDGPUTargetLowering::mayIgnoreSignedZero(SDValue Op) const { | |||
| 616 | if (getTargetMachine().Options.NoSignedZerosFPMath) | |||
| 617 | return true; | |||
| 618 | ||||
| 619 | const auto Flags = Op.getNode()->getFlags(); | |||
| 620 | if (Flags.hasNoSignedZeros()) | |||
| 621 | return true; | |||
| 622 | ||||
| 623 | return false; | |||
| 624 | } | |||
| 625 | ||||
| 626 | //===----------------------------------------------------------------------===// | |||
| 627 | // Target Information | |||
| 628 | //===----------------------------------------------------------------------===// | |||
| 629 | ||||
| 630 | LLVM_READNONE__attribute__((__const__)) | |||
| 631 | static bool fnegFoldsIntoOp(unsigned Opc) { | |||
| 632 | switch (Opc) { | |||
| 633 | case ISD::FADD: | |||
| 634 | case ISD::FSUB: | |||
| 635 | case ISD::FMUL: | |||
| 636 | case ISD::FMA: | |||
| 637 | case ISD::FMAD: | |||
| 638 | case ISD::FMINNUM: | |||
| 639 | case ISD::FMAXNUM: | |||
| 640 | case ISD::FMINNUM_IEEE: | |||
| 641 | case ISD::FMAXNUM_IEEE: | |||
| 642 | case ISD::FSIN: | |||
| 643 | case ISD::FTRUNC: | |||
| 644 | case ISD::FRINT: | |||
| 645 | case ISD::FNEARBYINT: | |||
| 646 | case ISD::FCANONICALIZE: | |||
| 647 | case AMDGPUISD::RCP: | |||
| 648 | case AMDGPUISD::RCP_LEGACY: | |||
| 649 | case AMDGPUISD::RCP_IFLAG: | |||
| 650 | case AMDGPUISD::SIN_HW: | |||
| 651 | case AMDGPUISD::FMUL_LEGACY: | |||
| 652 | case AMDGPUISD::FMIN_LEGACY: | |||
| 653 | case AMDGPUISD::FMAX_LEGACY: | |||
| 654 | case AMDGPUISD::FMED3: | |||
| 655 | // TODO: handle llvm.amdgcn.fma.legacy | |||
| 656 | return true; | |||
| 657 | default: | |||
| 658 | return false; | |||
| 659 | } | |||
| 660 | } | |||
| 661 | ||||
| 662 | /// \p returns true if the operation will definitely need to use a 64-bit | |||
| 663 | /// encoding, and thus will use a VOP3 encoding regardless of the source | |||
| 664 | /// modifiers. | |||
| 665 | LLVM_READONLY__attribute__((__pure__)) | |||
| 666 | static bool opMustUseVOP3Encoding(const SDNode *N, MVT VT) { | |||
| 667 | return N->getNumOperands() > 2 || VT == MVT::f64; | |||
| 668 | } | |||
| 669 | ||||
| 670 | // Most FP instructions support source modifiers, but this could be refined | |||
| 671 | // slightly. | |||
| 672 | LLVM_READONLY__attribute__((__pure__)) | |||
| 673 | static bool hasSourceMods(const SDNode *N) { | |||
| 674 | if (isa<MemSDNode>(N)) | |||
| 675 | return false; | |||
| 676 | ||||
| 677 | switch (N->getOpcode()) { | |||
| 678 | case ISD::CopyToReg: | |||
| 679 | case ISD::SELECT: | |||
| 680 | case ISD::FDIV: | |||
| 681 | case ISD::FREM: | |||
| 682 | case ISD::INLINEASM: | |||
| 683 | case ISD::INLINEASM_BR: | |||
| 684 | case AMDGPUISD::DIV_SCALE: | |||
| 685 | case ISD::INTRINSIC_W_CHAIN: | |||
| 686 | ||||
| 687 | // TODO: Should really be looking at the users of the bitcast. These are | |||
| 688 | // problematic because bitcasts are used to legalize all stores to integer | |||
| 689 | // types. | |||
| 690 | case ISD::BITCAST: | |||
| 691 | return false; | |||
| 692 | case ISD::INTRINSIC_WO_CHAIN: { | |||
| 693 | switch (cast<ConstantSDNode>(N->getOperand(0))->getZExtValue()) { | |||
| 694 | case Intrinsic::amdgcn_interp_p1: | |||
| 695 | case Intrinsic::amdgcn_interp_p2: | |||
| 696 | case Intrinsic::amdgcn_interp_mov: | |||
| 697 | case Intrinsic::amdgcn_interp_p1_f16: | |||
| 698 | case Intrinsic::amdgcn_interp_p2_f16: | |||
| 699 | return false; | |||
| 700 | default: | |||
| 701 | return true; | |||
| 702 | } | |||
| 703 | } | |||
| 704 | default: | |||
| 705 | return true; | |||
| 706 | } | |||
| 707 | } | |||
| 708 | ||||
| 709 | bool AMDGPUTargetLowering::allUsesHaveSourceMods(const SDNode *N, | |||
| 710 | unsigned CostThreshold) { | |||
| 711 | // Some users (such as 3-operand FMA/MAD) must use a VOP3 encoding, and thus | |||
| 712 | // it is truly free to use a source modifier in all cases. If there are | |||
| 713 | // multiple users but for each one will necessitate using VOP3, there will be | |||
| 714 | // a code size increase. Try to avoid increasing code size unless we know it | |||
| 715 | // will save on the instruction count. | |||
| 716 | unsigned NumMayIncreaseSize = 0; | |||
| 717 | MVT VT = N->getValueType(0).getScalarType().getSimpleVT(); | |||
| 718 | ||||
| 719 | // XXX - Should this limit number of uses to check? | |||
| 720 | for (const SDNode *U : N->uses()) { | |||
| 721 | if (!hasSourceMods(U)) | |||
| 722 | return false; | |||
| 723 | ||||
| 724 | if (!opMustUseVOP3Encoding(U, VT)) { | |||
| 725 | if (++NumMayIncreaseSize > CostThreshold) | |||
| 726 | return false; | |||
| 727 | } | |||
| 728 | } | |||
| 729 | ||||
| 730 | return true; | |||
| 731 | } | |||
| 732 | ||||
| 733 | EVT AMDGPUTargetLowering::getTypeForExtReturn(LLVMContext &Context, EVT VT, | |||
| 734 | ISD::NodeType ExtendKind) const { | |||
| 735 | assert(!VT.isVector() && "only scalar expected")((void)0); | |||
| 736 | ||||
| 737 | // Round to the next multiple of 32-bits. | |||
| 738 | unsigned Size = VT.getSizeInBits(); | |||
| 739 | if (Size <= 32) | |||
| 740 | return MVT::i32; | |||
| 741 | return EVT::getIntegerVT(Context, 32 * ((Size + 31) / 32)); | |||
| 742 | } | |||
| 743 | ||||
| 744 | MVT AMDGPUTargetLowering::getVectorIdxTy(const DataLayout &) const { | |||
| 745 | return MVT::i32; | |||
| 746 | } | |||
| 747 | ||||
| 748 | bool AMDGPUTargetLowering::isSelectSupported(SelectSupportKind SelType) const { | |||
| 749 | return true; | |||
| 750 | } | |||
| 751 | ||||
| 752 | // The backend supports 32 and 64 bit floating point immediates. | |||
| 753 | // FIXME: Why are we reporting vectors of FP immediates as legal? | |||
| 754 | bool AMDGPUTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT, | |||
| 755 | bool ForCodeSize) const { | |||
| 756 | EVT ScalarVT = VT.getScalarType(); | |||
| 757 | return (ScalarVT == MVT::f32 || ScalarVT == MVT::f64 || | |||
| 758 | (ScalarVT == MVT::f16 && Subtarget->has16BitInsts())); | |||
| 759 | } | |||
| 760 | ||||
| 761 | // We don't want to shrink f64 / f32 constants. | |||
| 762 | bool AMDGPUTargetLowering::ShouldShrinkFPConstant(EVT VT) const { | |||
| 763 | EVT ScalarVT = VT.getScalarType(); | |||
| 764 | return (ScalarVT != MVT::f32 && ScalarVT != MVT::f64); | |||
| 765 | } | |||
| 766 | ||||
| 767 | bool AMDGPUTargetLowering::shouldReduceLoadWidth(SDNode *N, | |||
| 768 | ISD::LoadExtType ExtTy, | |||
| 769 | EVT NewVT) const { | |||
| 770 | // TODO: This may be worth removing. Check regression tests for diffs. | |||
| 771 | if (!TargetLoweringBase::shouldReduceLoadWidth(N, ExtTy, NewVT)) | |||
| 772 | return false; | |||
| 773 | ||||
| 774 | unsigned NewSize = NewVT.getStoreSizeInBits(); | |||
| 775 | ||||
| 776 | // If we are reducing to a 32-bit load or a smaller multi-dword load, | |||
| 777 | // this is always better. | |||
| 778 | if (NewSize >= 32) | |||
| 779 | return true; | |||
| 780 | ||||
| 781 | EVT OldVT = N->getValueType(0); | |||
| 782 | unsigned OldSize = OldVT.getStoreSizeInBits(); | |||
| 783 | ||||
| 784 | MemSDNode *MN = cast<MemSDNode>(N); | |||
| 785 | unsigned AS = MN->getAddressSpace(); | |||
| 786 | // Do not shrink an aligned scalar load to sub-dword. | |||
| 787 | // Scalar engine cannot do sub-dword loads. | |||
| 788 | if (OldSize >= 32 && NewSize < 32 && MN->getAlignment() >= 4 && | |||
| 789 | (AS == AMDGPUAS::CONSTANT_ADDRESS || | |||
| 790 | AS == AMDGPUAS::CONSTANT_ADDRESS_32BIT || | |||
| 791 | (isa<LoadSDNode>(N) && | |||
| 792 | AS == AMDGPUAS::GLOBAL_ADDRESS && MN->isInvariant())) && | |||
| 793 | AMDGPUInstrInfo::isUniformMMO(MN->getMemOperand())) | |||
| 794 | return false; | |||
| 795 | ||||
| 796 | // Don't produce extloads from sub 32-bit types. SI doesn't have scalar | |||
| 797 | // extloads, so doing one requires using a buffer_load. In cases where we | |||
| 798 | // still couldn't use a scalar load, using the wider load shouldn't really | |||
| 799 | // hurt anything. | |||
| 800 | ||||
| 801 | // If the old size already had to be an extload, there's no harm in continuing | |||
| 802 | // to reduce the width. | |||
| 803 | return (OldSize < 32); | |||
| 804 | } | |||
| 805 | ||||
| 806 | bool AMDGPUTargetLowering::isLoadBitCastBeneficial(EVT LoadTy, EVT CastTy, | |||
| 807 | const SelectionDAG &DAG, | |||
| 808 | const MachineMemOperand &MMO) const { | |||
| 809 | ||||
| 810 | assert(LoadTy.getSizeInBits() == CastTy.getSizeInBits())((void)0); | |||
| 811 | ||||
| 812 | if (LoadTy.getScalarType() == MVT::i32) | |||
| 813 | return false; | |||
| 814 | ||||
| 815 | unsigned LScalarSize = LoadTy.getScalarSizeInBits(); | |||
| 816 | unsigned CastScalarSize = CastTy.getScalarSizeInBits(); | |||
| 817 | ||||
| 818 | if ((LScalarSize >= CastScalarSize) && (CastScalarSize < 32)) | |||
| 819 | return false; | |||
| 820 | ||||
| 821 | bool Fast = false; | |||
| 822 | return allowsMemoryAccessForAlignment(*DAG.getContext(), DAG.getDataLayout(), | |||
| 823 | CastTy, MMO, &Fast) && | |||
| 824 | Fast; | |||
| 825 | } | |||
| 826 | ||||
| 827 | // SI+ has instructions for cttz / ctlz for 32-bit values. This is probably also | |||
| 828 | // profitable with the expansion for 64-bit since it's generally good to | |||
| 829 | // speculate things. | |||
| 830 | // FIXME: These should really have the size as a parameter. | |||
| 831 | bool AMDGPUTargetLowering::isCheapToSpeculateCttz() const { | |||
| 832 | return true; | |||
| 833 | } | |||
| 834 | ||||
| 835 | bool AMDGPUTargetLowering::isCheapToSpeculateCtlz() const { | |||
| 836 | return true; | |||
| 837 | } | |||
| 838 | ||||
| 839 | bool AMDGPUTargetLowering::isSDNodeAlwaysUniform(const SDNode *N) const { | |||
| 840 | switch (N->getOpcode()) { | |||
| 841 | case ISD::EntryToken: | |||
| 842 | case ISD::TokenFactor: | |||
| 843 | return true; | |||
| 844 | case ISD::INTRINSIC_WO_CHAIN: { | |||
| 845 | unsigned IntrID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue(); | |||
| 846 | switch (IntrID) { | |||
| 847 | case Intrinsic::amdgcn_readfirstlane: | |||
| 848 | case Intrinsic::amdgcn_readlane: | |||
| 849 | return true; | |||
| 850 | } | |||
| 851 | return false; | |||
| 852 | } | |||
| 853 | case ISD::LOAD: | |||
| 854 | if (cast<LoadSDNode>(N)->getMemOperand()->getAddrSpace() == | |||
| 855 | AMDGPUAS::CONSTANT_ADDRESS_32BIT) | |||
| 856 | return true; | |||
| 857 | return false; | |||
| 858 | } | |||
| 859 | return false; | |||
| 860 | } | |||
| 861 | ||||
| 862 | SDValue AMDGPUTargetLowering::getNegatedExpression( | |||
| 863 | SDValue Op, SelectionDAG &DAG, bool LegalOperations, bool ForCodeSize, | |||
| 864 | NegatibleCost &Cost, unsigned Depth) const { | |||
| 865 | ||||
| 866 | switch (Op.getOpcode()) { | |||
| 867 | case ISD::FMA: | |||
| 868 | case ISD::FMAD: { | |||
| 869 | // Negating a fma is not free if it has users without source mods. | |||
| 870 | if (!allUsesHaveSourceMods(Op.getNode())) | |||
| 871 | return SDValue(); | |||
| 872 | break; | |||
| 873 | } | |||
| 874 | default: | |||
| 875 | break; | |||
| 876 | } | |||
| 877 | ||||
| 878 | return TargetLowering::getNegatedExpression(Op, DAG, LegalOperations, | |||
| 879 | ForCodeSize, Cost, Depth); | |||
| 880 | } | |||
| 881 | ||||
| 882 | //===---------------------------------------------------------------------===// | |||
| 883 | // Target Properties | |||
| 884 | //===---------------------------------------------------------------------===// | |||
| 885 | ||||
| 886 | bool AMDGPUTargetLowering::isFAbsFree(EVT VT) const { | |||
| 887 | assert(VT.isFloatingPoint())((void)0); | |||
| 888 | ||||
| 889 | // Packed operations do not have a fabs modifier. | |||
| 890 | return VT == MVT::f32 || VT == MVT::f64 || | |||
| 891 | (Subtarget->has16BitInsts() && VT == MVT::f16); | |||
| 892 | } | |||
| 893 | ||||
| 894 | bool AMDGPUTargetLowering::isFNegFree(EVT VT) const { | |||
| 895 | assert(VT.isFloatingPoint())((void)0); | |||
| 896 | // Report this based on the end legalized type. | |||
| 897 | VT = VT.getScalarType(); | |||
| 898 | return VT == MVT::f32 || VT == MVT::f64 || VT == MVT::f16; | |||
| 899 | } | |||
| 900 | ||||
| 901 | bool AMDGPUTargetLowering:: storeOfVectorConstantIsCheap(EVT MemVT, | |||
| 902 | unsigned NumElem, | |||
| 903 | unsigned AS) const { | |||
| 904 | return true; | |||
| 905 | } | |||
| 906 | ||||
| 907 | bool AMDGPUTargetLowering::aggressivelyPreferBuildVectorSources(EVT VecVT) const { | |||
| 908 | // There are few operations which truly have vector input operands. Any vector | |||
| 909 | // operation is going to involve operations on each component, and a | |||
| 910 | // build_vector will be a copy per element, so it always makes sense to use a | |||
| 911 | // build_vector input in place of the extracted element to avoid a copy into a | |||
| 912 | // super register. | |||
| 913 | // | |||
| 914 | // We should probably only do this if all users are extracts only, but this | |||
| 915 | // should be the common case. | |||
| 916 | return true; | |||
| 917 | } | |||
| 918 | ||||
| 919 | bool AMDGPUTargetLowering::isTruncateFree(EVT Source, EVT Dest) const { | |||
| 920 | // Truncate is just accessing a subregister. | |||
| 921 | ||||
| 922 | unsigned SrcSize = Source.getSizeInBits(); | |||
| 923 | unsigned DestSize = Dest.getSizeInBits(); | |||
| 924 | ||||
| 925 | return DestSize < SrcSize && DestSize % 32 == 0 ; | |||
| 926 | } | |||
| 927 | ||||
| 928 | bool AMDGPUTargetLowering::isTruncateFree(Type *Source, Type *Dest) const { | |||
| 929 | // Truncate is just accessing a subregister. | |||
| 930 | ||||
| 931 | unsigned SrcSize = Source->getScalarSizeInBits(); | |||
| 932 | unsigned DestSize = Dest->getScalarSizeInBits(); | |||
| 933 | ||||
| 934 | if (DestSize== 16 && Subtarget->has16BitInsts()) | |||
| 935 | return SrcSize >= 32; | |||
| 936 | ||||
| 937 | return DestSize < SrcSize && DestSize % 32 == 0; | |||
| 938 | } | |||
| 939 | ||||
| 940 | bool AMDGPUTargetLowering::isZExtFree(Type *Src, Type *Dest) const { | |||
| 941 | unsigned SrcSize = Src->getScalarSizeInBits(); | |||
| 942 | unsigned DestSize = Dest->getScalarSizeInBits(); | |||
| 943 | ||||
| 944 | if (SrcSize == 16 && Subtarget->has16BitInsts()) | |||
| 945 | return DestSize >= 32; | |||
| 946 | ||||
| 947 | return SrcSize == 32 && DestSize == 64; | |||
| 948 | } | |||
| 949 | ||||
| 950 | bool AMDGPUTargetLowering::isZExtFree(EVT Src, EVT Dest) const { | |||
| 951 | // Any register load of a 64-bit value really requires 2 32-bit moves. For all | |||
| 952 | // practical purposes, the extra mov 0 to load a 64-bit is free. As used, | |||
| 953 | // this will enable reducing 64-bit operations the 32-bit, which is always | |||
| 954 | // good. | |||
| 955 | ||||
| 956 | if (Src == MVT::i16) | |||
| 957 | return Dest == MVT::i32 ||Dest == MVT::i64 ; | |||
| 958 | ||||
| 959 | return Src == MVT::i32 && Dest == MVT::i64; | |||
| 960 | } | |||
| 961 | ||||
| 962 | bool AMDGPUTargetLowering::isZExtFree(SDValue Val, EVT VT2) const { | |||
| 963 | return isZExtFree(Val.getValueType(), VT2); | |||
| 964 | } | |||
| 965 | ||||
| 966 | bool AMDGPUTargetLowering::isNarrowingProfitable(EVT SrcVT, EVT DestVT) const { | |||
| 967 | // There aren't really 64-bit registers, but pairs of 32-bit ones and only a | |||
| 968 | // limited number of native 64-bit operations. Shrinking an operation to fit | |||
| 969 | // in a single 32-bit register should always be helpful. As currently used, | |||
| 970 | // this is much less general than the name suggests, and is only used in | |||
| 971 | // places trying to reduce the sizes of loads. Shrinking loads to < 32-bits is | |||
| 972 | // not profitable, and may actually be harmful. | |||
| 973 | return SrcVT.getSizeInBits() > 32 && DestVT.getSizeInBits() == 32; | |||
| 974 | } | |||
| 975 | ||||
| 976 | //===---------------------------------------------------------------------===// | |||
| 977 | // TargetLowering Callbacks | |||
| 978 | //===---------------------------------------------------------------------===// | |||
| 979 | ||||
| 980 | CCAssignFn *AMDGPUCallLowering::CCAssignFnForCall(CallingConv::ID CC, | |||
| 981 | bool IsVarArg) { | |||
| 982 | switch (CC) { | |||
| 983 | case CallingConv::AMDGPU_VS: | |||
| 984 | case CallingConv::AMDGPU_GS: | |||
| 985 | case CallingConv::AMDGPU_PS: | |||
| 986 | case CallingConv::AMDGPU_CS: | |||
| 987 | case CallingConv::AMDGPU_HS: | |||
| 988 | case CallingConv::AMDGPU_ES: | |||
| 989 | case CallingConv::AMDGPU_LS: | |||
| 990 | return CC_AMDGPU; | |||
| 991 | case CallingConv::C: | |||
| 992 | case CallingConv::Fast: | |||
| 993 | case CallingConv::Cold: | |||
| 994 | return CC_AMDGPU_Func; | |||
| 995 | case CallingConv::AMDGPU_Gfx: | |||
| 996 | return CC_SI_Gfx; | |||
| 997 | case CallingConv::AMDGPU_KERNEL: | |||
| 998 | case CallingConv::SPIR_KERNEL: | |||
| 999 | default: | |||
| 1000 | report_fatal_error("Unsupported calling convention for call"); | |||
| 1001 | } | |||
| 1002 | } | |||
| 1003 | ||||
| 1004 | CCAssignFn *AMDGPUCallLowering::CCAssignFnForReturn(CallingConv::ID CC, | |||
| 1005 | bool IsVarArg) { | |||
| 1006 | switch (CC) { | |||
| 1007 | case CallingConv::AMDGPU_KERNEL: | |||
| 1008 | case CallingConv::SPIR_KERNEL: | |||
| 1009 | llvm_unreachable("kernels should not be handled here")__builtin_unreachable(); | |||
| 1010 | case CallingConv::AMDGPU_VS: | |||
| 1011 | case CallingConv::AMDGPU_GS: | |||
| 1012 | case CallingConv::AMDGPU_PS: | |||
| 1013 | case CallingConv::AMDGPU_CS: | |||
| 1014 | case CallingConv::AMDGPU_HS: | |||
| 1015 | case CallingConv::AMDGPU_ES: | |||
| 1016 | case CallingConv::AMDGPU_LS: | |||
| 1017 | return RetCC_SI_Shader; | |||
| 1018 | case CallingConv::AMDGPU_Gfx: | |||
| 1019 | return RetCC_SI_Gfx; | |||
| 1020 | case CallingConv::C: | |||
| 1021 | case CallingConv::Fast: | |||
| 1022 | case CallingConv::Cold: | |||
| 1023 | return RetCC_AMDGPU_Func; | |||
| 1024 | default: | |||
| 1025 | report_fatal_error("Unsupported calling convention."); | |||
| 1026 | } | |||
| 1027 | } | |||
| 1028 | ||||
| 1029 | /// The SelectionDAGBuilder will automatically promote function arguments | |||
| 1030 | /// with illegal types. However, this does not work for the AMDGPU targets | |||
| 1031 | /// since the function arguments are stored in memory as these illegal types. | |||
| 1032 | /// In order to handle this properly we need to get the original types sizes | |||
| 1033 | /// from the LLVM IR Function and fixup the ISD:InputArg values before | |||
| 1034 | /// passing them to AnalyzeFormalArguments() | |||
| 1035 | ||||
| 1036 | /// When the SelectionDAGBuilder computes the Ins, it takes care of splitting | |||
| 1037 | /// input values across multiple registers. Each item in the Ins array | |||
| 1038 | /// represents a single value that will be stored in registers. Ins[x].VT is | |||
| 1039 | /// the value type of the value that will be stored in the register, so | |||
| 1040 | /// whatever SDNode we lower the argument to needs to be this type. | |||
| 1041 | /// | |||
| 1042 | /// In order to correctly lower the arguments we need to know the size of each | |||
| 1043 | /// argument. Since Ins[x].VT gives us the size of the register that will | |||
| 1044 | /// hold the value, we need to look at Ins[x].ArgVT to see the 'real' type | |||
| 1045 | /// for the orignal function argument so that we can deduce the correct memory | |||
| 1046 | /// type to use for Ins[x]. In most cases the correct memory type will be | |||
| 1047 | /// Ins[x].ArgVT. However, this will not always be the case. If, for example, | |||
| 1048 | /// we have a kernel argument of type v8i8, this argument will be split into | |||
| 1049 | /// 8 parts and each part will be represented by its own item in the Ins array. | |||
| 1050 | /// For each part the Ins[x].ArgVT will be the v8i8, which is the full type of | |||
| 1051 | /// the argument before it was split. From this, we deduce that the memory type | |||
| 1052 | /// for each individual part is i8. We pass the memory type as LocVT to the | |||
| 1053 | /// calling convention analysis function and the register type (Ins[x].VT) as | |||
| 1054 | /// the ValVT. | |||
| 1055 | void AMDGPUTargetLowering::analyzeFormalArgumentsCompute( | |||
| 1056 | CCState &State, | |||
| 1057 | const SmallVectorImpl<ISD::InputArg> &Ins) const { | |||
| 1058 | const MachineFunction &MF = State.getMachineFunction(); | |||
| 1059 | const Function &Fn = MF.getFunction(); | |||
| 1060 | LLVMContext &Ctx = Fn.getParent()->getContext(); | |||
| 1061 | const AMDGPUSubtarget &ST = AMDGPUSubtarget::get(MF); | |||
| 1062 | const unsigned ExplicitOffset = ST.getExplicitKernelArgOffset(Fn); | |||
| 1063 | CallingConv::ID CC = Fn.getCallingConv(); | |||
| 1064 | ||||
| 1065 | Align MaxAlign = Align(1); | |||
| 1066 | uint64_t ExplicitArgOffset = 0; | |||
| 1067 | const DataLayout &DL = Fn.getParent()->getDataLayout(); | |||
| 1068 | ||||
| 1069 | unsigned InIndex = 0; | |||
| 1070 | ||||
| 1071 | for (const Argument &Arg : Fn.args()) { | |||
| 1072 | const bool IsByRef = Arg.hasByRefAttr(); | |||
| 1073 | Type *BaseArgTy = Arg.getType(); | |||
| 1074 | Type *MemArgTy = IsByRef ? Arg.getParamByRefType() : BaseArgTy; | |||
| 1075 | MaybeAlign Alignment = IsByRef ? Arg.getParamAlign() : None; | |||
| 1076 | if (!Alignment) | |||
| 1077 | Alignment = DL.getABITypeAlign(MemArgTy); | |||
| 1078 | MaxAlign = max(Alignment, MaxAlign); | |||
| 1079 | uint64_t AllocSize = DL.getTypeAllocSize(MemArgTy); | |||
| 1080 | ||||
| 1081 | uint64_t ArgOffset = alignTo(ExplicitArgOffset, Alignment) + ExplicitOffset; | |||
| 1082 | ExplicitArgOffset = alignTo(ExplicitArgOffset, Alignment) + AllocSize; | |||
| 1083 | ||||
| 1084 | // We're basically throwing away everything passed into us and starting over | |||
| 1085 | // to get accurate in-memory offsets. The "PartOffset" is completely useless | |||
| 1086 | // to us as computed in Ins. | |||
| 1087 | // | |||
| 1088 | // We also need to figure out what type legalization is trying to do to get | |||
| 1089 | // the correct memory offsets. | |||
| 1090 | ||||
| 1091 | SmallVector<EVT, 16> ValueVTs; | |||
| 1092 | SmallVector<uint64_t, 16> Offsets; | |||
| 1093 | ComputeValueVTs(*this, DL, BaseArgTy, ValueVTs, &Offsets, ArgOffset); | |||
| 1094 | ||||
| 1095 | for (unsigned Value = 0, NumValues = ValueVTs.size(); | |||
| 1096 | Value != NumValues; ++Value) { | |||
| 1097 | uint64_t BasePartOffset = Offsets[Value]; | |||
| 1098 | ||||
| 1099 | EVT ArgVT = ValueVTs[Value]; | |||
| 1100 | EVT MemVT = ArgVT; | |||
| 1101 | MVT RegisterVT = getRegisterTypeForCallingConv(Ctx, CC, ArgVT); | |||
| 1102 | unsigned NumRegs = getNumRegistersForCallingConv(Ctx, CC, ArgVT); | |||
| 1103 | ||||
| 1104 | if (NumRegs == 1) { | |||
| 1105 | // This argument is not split, so the IR type is the memory type. | |||
| 1106 | if (ArgVT.isExtended()) { | |||
| 1107 | // We have an extended type, like i24, so we should just use the | |||
| 1108 | // register type. | |||
| 1109 | MemVT = RegisterVT; | |||
| 1110 | } else { | |||
| 1111 | MemVT = ArgVT; | |||
| 1112 | } | |||
| 1113 | } else if (ArgVT.isVector() && RegisterVT.isVector() && | |||
| 1114 | ArgVT.getScalarType() == RegisterVT.getScalarType()) { | |||
| 1115 | assert(ArgVT.getVectorNumElements() > RegisterVT.getVectorNumElements())((void)0); | |||
| 1116 | // We have a vector value which has been split into a vector with | |||
| 1117 | // the same scalar type, but fewer elements. This should handle | |||
| 1118 | // all the floating-point vector types. | |||
| 1119 | MemVT = RegisterVT; | |||
| 1120 | } else if (ArgVT.isVector() && | |||
| 1121 | ArgVT.getVectorNumElements() == NumRegs) { | |||
| 1122 | // This arg has been split so that each element is stored in a separate | |||
| 1123 | // register. | |||
| 1124 | MemVT = ArgVT.getScalarType(); | |||
| 1125 | } else if (ArgVT.isExtended()) { | |||
| 1126 | // We have an extended type, like i65. | |||
| 1127 | MemVT = RegisterVT; | |||
| 1128 | } else { | |||
| 1129 | unsigned MemoryBits = ArgVT.getStoreSizeInBits() / NumRegs; | |||
| 1130 | assert(ArgVT.getStoreSizeInBits() % NumRegs == 0)((void)0); | |||
| 1131 | if (RegisterVT.isInteger()) { | |||
| 1132 | MemVT = EVT::getIntegerVT(State.getContext(), MemoryBits); | |||
| 1133 | } else if (RegisterVT.isVector()) { | |||
| 1134 | assert(!RegisterVT.getScalarType().isFloatingPoint())((void)0); | |||
| 1135 | unsigned NumElements = RegisterVT.getVectorNumElements(); | |||
| 1136 | assert(MemoryBits % NumElements == 0)((void)0); | |||
| 1137 | // This vector type has been split into another vector type with | |||
| 1138 | // a different elements size. | |||
| 1139 | EVT ScalarVT = EVT::getIntegerVT(State.getContext(), | |||
| 1140 | MemoryBits / NumElements); | |||
| 1141 | MemVT = EVT::getVectorVT(State.getContext(), ScalarVT, NumElements); | |||
| 1142 | } else { | |||
| 1143 | llvm_unreachable("cannot deduce memory type.")__builtin_unreachable(); | |||
| 1144 | } | |||
| 1145 | } | |||
| 1146 | ||||
| 1147 | // Convert one element vectors to scalar. | |||
| 1148 | if (MemVT.isVector() && MemVT.getVectorNumElements() == 1) | |||
| 1149 | MemVT = MemVT.getScalarType(); | |||
| 1150 | ||||
| 1151 | // Round up vec3/vec5 argument. | |||
| 1152 | if (MemVT.isVector() && !MemVT.isPow2VectorType()) { | |||
| 1153 | assert(MemVT.getVectorNumElements() == 3 ||((void)0) | |||
| 1154 | MemVT.getVectorNumElements() == 5)((void)0); | |||
| 1155 | MemVT = MemVT.getPow2VectorType(State.getContext()); | |||
| 1156 | } else if (!MemVT.isSimple() && !MemVT.isVector()) { | |||
| 1157 | MemVT = MemVT.getRoundIntegerType(State.getContext()); | |||
| 1158 | } | |||
| 1159 | ||||
| 1160 | unsigned PartOffset = 0; | |||
| 1161 | for (unsigned i = 0; i != NumRegs; ++i) { | |||
| 1162 | State.addLoc(CCValAssign::getCustomMem(InIndex++, RegisterVT, | |||
| 1163 | BasePartOffset + PartOffset, | |||
| 1164 | MemVT.getSimpleVT(), | |||
| 1165 | CCValAssign::Full)); | |||
| 1166 | PartOffset += MemVT.getStoreSize(); | |||
| 1167 | } | |||
| 1168 | } | |||
| 1169 | } | |||
| 1170 | } | |||
| 1171 | ||||
| 1172 | SDValue AMDGPUTargetLowering::LowerReturn( | |||
| 1173 | SDValue Chain, CallingConv::ID CallConv, | |||
| 1174 | bool isVarArg, | |||
| 1175 | const SmallVectorImpl<ISD::OutputArg> &Outs, | |||
| 1176 | const SmallVectorImpl<SDValue> &OutVals, | |||
| 1177 | const SDLoc &DL, SelectionDAG &DAG) const { | |||
| 1178 | // FIXME: Fails for r600 tests | |||
| 1179 | //assert(!isVarArg && Outs.empty() && OutVals.empty() && | |||
| 1180 | // "wave terminate should not have return values"); | |||
| 1181 | return DAG.getNode(AMDGPUISD::ENDPGM, DL, MVT::Other, Chain); | |||
| 1182 | } | |||
| 1183 | ||||
| 1184 | //===---------------------------------------------------------------------===// | |||
| 1185 | // Target specific lowering | |||
| 1186 | //===---------------------------------------------------------------------===// | |||
| 1187 | ||||
| 1188 | /// Selects the correct CCAssignFn for a given CallingConvention value. | |||
| 1189 | CCAssignFn *AMDGPUTargetLowering::CCAssignFnForCall(CallingConv::ID CC, | |||
| 1190 | bool IsVarArg) { | |||
| 1191 | return AMDGPUCallLowering::CCAssignFnForCall(CC, IsVarArg); | |||
| 1192 | } | |||
| 1193 | ||||
| 1194 | CCAssignFn *AMDGPUTargetLowering::CCAssignFnForReturn(CallingConv::ID CC, | |||
| 1195 | bool IsVarArg) { | |||
| 1196 | return AMDGPUCallLowering::CCAssignFnForReturn(CC, IsVarArg); | |||
| 1197 | } | |||
| 1198 | ||||
| 1199 | SDValue AMDGPUTargetLowering::addTokenForArgument(SDValue Chain, | |||
| 1200 | SelectionDAG &DAG, | |||
| 1201 | MachineFrameInfo &MFI, | |||
| 1202 | int ClobberedFI) const { | |||
| 1203 | SmallVector<SDValue, 8> ArgChains; | |||
| 1204 | int64_t FirstByte = MFI.getObjectOffset(ClobberedFI); | |||
| 1205 | int64_t LastByte = FirstByte + MFI.getObjectSize(ClobberedFI) - 1; | |||
| 1206 | ||||
| 1207 | // Include the original chain at the beginning of the list. When this is | |||
| 1208 | // used by target LowerCall hooks, this helps legalize find the | |||
| 1209 | // CALLSEQ_BEGIN node. | |||
| 1210 | ArgChains.push_back(Chain); | |||
| 1211 | ||||
| 1212 | // Add a chain value for each stack argument corresponding | |||
| 1213 | for (SDNode::use_iterator U = DAG.getEntryNode().getNode()->use_begin(), | |||
| 1214 | UE = DAG.getEntryNode().getNode()->use_end(); | |||
| 1215 | U != UE; ++U) { | |||
| 1216 | if (LoadSDNode *L = dyn_cast<LoadSDNode>(*U)) { | |||
| 1217 | if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(L->getBasePtr())) { | |||
| 1218 | if (FI->getIndex() < 0) { | |||
| 1219 | int64_t InFirstByte = MFI.getObjectOffset(FI->getIndex()); | |||
| 1220 | int64_t InLastByte = InFirstByte; | |||
| 1221 | InLastByte += MFI.getObjectSize(FI->getIndex()) - 1; | |||
| 1222 | ||||
| 1223 | if ((InFirstByte <= FirstByte && FirstByte <= InLastByte) || | |||
| 1224 | (FirstByte <= InFirstByte && InFirstByte <= LastByte)) | |||
| 1225 | ArgChains.push_back(SDValue(L, 1)); | |||
| 1226 | } | |||
| 1227 | } | |||
| 1228 | } | |||
| 1229 | } | |||
| 1230 | ||||
| 1231 | // Build a tokenfactor for all the chains. | |||
| 1232 | return DAG.getNode(ISD::TokenFactor, SDLoc(Chain), MVT::Other, ArgChains); | |||
| 1233 | } | |||
| 1234 | ||||
| 1235 | SDValue AMDGPUTargetLowering::lowerUnhandledCall(CallLoweringInfo &CLI, | |||
| 1236 | SmallVectorImpl<SDValue> &InVals, | |||
| 1237 | StringRef Reason) const { | |||
| 1238 | SDValue Callee = CLI.Callee; | |||
| 1239 | SelectionDAG &DAG = CLI.DAG; | |||
| 1240 | ||||
| 1241 | const Function &Fn = DAG.getMachineFunction().getFunction(); | |||
| 1242 | ||||
| 1243 | StringRef FuncName("<unknown>"); | |||
| 1244 | ||||
| 1245 | if (const ExternalSymbolSDNode *G = dyn_cast<ExternalSymbolSDNode>(Callee)) | |||
| 1246 | FuncName = G->getSymbol(); | |||
| 1247 | else if (const GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) | |||
| 1248 | FuncName = G->getGlobal()->getName(); | |||
| 1249 | ||||
| 1250 | DiagnosticInfoUnsupported NoCalls( | |||
| 1251 | Fn, Reason + FuncName, CLI.DL.getDebugLoc()); | |||
| 1252 | DAG.getContext()->diagnose(NoCalls); | |||
| 1253 | ||||
| 1254 | if (!CLI.IsTailCall) { | |||
| 1255 | for (unsigned I = 0, E = CLI.Ins.size(); I != E; ++I) | |||
| 1256 | InVals.push_back(DAG.getUNDEF(CLI.Ins[I].VT)); | |||
| 1257 | } | |||
| 1258 | ||||
| 1259 | return DAG.getEntryNode(); | |||
| 1260 | } | |||
| 1261 | ||||
| 1262 | SDValue AMDGPUTargetLowering::LowerCall(CallLoweringInfo &CLI, | |||
| 1263 | SmallVectorImpl<SDValue> &InVals) const { | |||
| 1264 | return lowerUnhandledCall(CLI, InVals, "unsupported call to function "); | |||
| 1265 | } | |||
| 1266 | ||||
| 1267 | SDValue AMDGPUTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op, | |||
| 1268 | SelectionDAG &DAG) const { | |||
| 1269 | const Function &Fn = DAG.getMachineFunction().getFunction(); | |||
| 1270 | ||||
| 1271 | DiagnosticInfoUnsupported NoDynamicAlloca(Fn, "unsupported dynamic alloca", | |||
| 1272 | SDLoc(Op).getDebugLoc()); | |||
| 1273 | DAG.getContext()->diagnose(NoDynamicAlloca); | |||
| 1274 | auto Ops = {DAG.getConstant(0, SDLoc(), Op.getValueType()), Op.getOperand(0)}; | |||
| 1275 | return DAG.getMergeValues(Ops, SDLoc()); | |||
| 1276 | } | |||
| 1277 | ||||
| 1278 | SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op, | |||
| 1279 | SelectionDAG &DAG) const { | |||
| 1280 | switch (Op.getOpcode()) { | |||
| 1281 | default: | |||
| 1282 | Op->print(errs(), &DAG); | |||
| 1283 | llvm_unreachable("Custom lowering code for this "__builtin_unreachable() | |||
| 1284 | "instruction is not implemented yet!")__builtin_unreachable(); | |||
| 1285 | break; | |||
| 1286 | case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op, DAG); | |||
| 1287 | case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG); | |||
| 1288 | case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG); | |||
| 1289 | case ISD::UDIVREM: return LowerUDIVREM(Op, DAG); | |||
| 1290 | case ISD::SDIVREM: return LowerSDIVREM(Op, DAG); | |||
| 1291 | case ISD::FREM: return LowerFREM(Op, DAG); | |||
| 1292 | case ISD::FCEIL: return LowerFCEIL(Op, DAG); | |||
| 1293 | case ISD::FTRUNC: return LowerFTRUNC(Op, DAG); | |||
| 1294 | case ISD::FRINT: return LowerFRINT(Op, DAG); | |||
| 1295 | case ISD::FNEARBYINT: return LowerFNEARBYINT(Op, DAG); | |||
| 1296 | case ISD::FROUND: return LowerFROUND(Op, DAG); | |||
| 1297 | case ISD::FFLOOR: return LowerFFLOOR(Op, DAG); | |||
| 1298 | case ISD::FLOG: | |||
| 1299 | return LowerFLOG(Op, DAG, numbers::ln2f); | |||
| 1300 | case ISD::FLOG10: | |||
| 1301 | return LowerFLOG(Op, DAG, numbers::ln2f / numbers::ln10f); | |||
| 1302 | case ISD::FEXP: | |||
| 1303 | return lowerFEXP(Op, DAG); | |||
| 1304 | case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG); | |||
| 1305 | case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG); | |||
| 1306 | case ISD::FP_TO_FP16: return LowerFP_TO_FP16(Op, DAG); | |||
| 1307 | case ISD::FP_TO_SINT: | |||
| 1308 | case ISD::FP_TO_UINT: | |||
| 1309 | return LowerFP_TO_INT(Op, DAG); | |||
| 1310 | case ISD::CTTZ: | |||
| 1311 | case ISD::CTTZ_ZERO_UNDEF: | |||
| 1312 | case ISD::CTLZ: | |||
| 1313 | case ISD::CTLZ_ZERO_UNDEF: | |||
| 1314 | return LowerCTLZ_CTTZ(Op, DAG); | |||
| 1315 | case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG); | |||
| 1316 | } | |||
| 1317 | return Op; | |||
| 1318 | } | |||
| 1319 | ||||
| 1320 | void AMDGPUTargetLowering::ReplaceNodeResults(SDNode *N, | |||
| 1321 | SmallVectorImpl<SDValue> &Results, | |||
| 1322 | SelectionDAG &DAG) const { | |||
| 1323 | switch (N->getOpcode()) { | |||
| 1324 | case ISD::SIGN_EXTEND_INREG: | |||
| 1325 | // Different parts of legalization seem to interpret which type of | |||
| 1326 | // sign_extend_inreg is the one to check for custom lowering. The extended | |||
| 1327 | // from type is what really matters, but some places check for custom | |||
| 1328 | // lowering of the result type. This results in trying to use | |||
| 1329 | // ReplaceNodeResults to sext_in_reg to an illegal type, so we'll just do | |||
| 1330 | // nothing here and let the illegal result integer be handled normally. | |||
| 1331 | return; | |||
| 1332 | default: | |||
| 1333 | return; | |||
| 1334 | } | |||
| 1335 | } | |||
| 1336 | ||||
| 1337 | bool AMDGPUTargetLowering::hasDefinedInitializer(const GlobalValue *GV) { | |||
| 1338 | const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV); | |||
| 1339 | if (!GVar || !GVar->hasInitializer()) | |||
| 1340 | return false; | |||
| 1341 | ||||
| 1342 | return !isa<UndefValue>(GVar->getInitializer()); | |||
| 1343 | } | |||
| 1344 | ||||
| 1345 | SDValue AMDGPUTargetLowering::LowerGlobalAddress(AMDGPUMachineFunction* MFI, | |||
| 1346 | SDValue Op, | |||
| 1347 | SelectionDAG &DAG) const { | |||
| 1348 | ||||
| 1349 | const DataLayout &DL = DAG.getDataLayout(); | |||
| 1350 | GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Op); | |||
| 1351 | const GlobalValue *GV = G->getGlobal(); | |||
| 1352 | ||||
| 1353 | if (G->getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS || | |||
| 1354 | G->getAddressSpace() == AMDGPUAS::REGION_ADDRESS) { | |||
| 1355 | if (!MFI->isModuleEntryFunction() && | |||
| 1356 | !GV->getName().equals("llvm.amdgcn.module.lds")) { | |||
| 1357 | SDLoc DL(Op); | |||
| 1358 | const Function &Fn = DAG.getMachineFunction().getFunction(); | |||
| 1359 | DiagnosticInfoUnsupported BadLDSDecl( | |||
| 1360 | Fn, "local memory global used by non-kernel function", | |||
| 1361 | DL.getDebugLoc(), DS_Warning); | |||
| 1362 | DAG.getContext()->diagnose(BadLDSDecl); | |||
| 1363 | ||||
| 1364 | // We currently don't have a way to correctly allocate LDS objects that | |||
| 1365 | // aren't directly associated with a kernel. We do force inlining of | |||
| 1366 | // functions that use local objects. However, if these dead functions are | |||
| 1367 | // not eliminated, we don't want a compile time error. Just emit a warning | |||
| 1368 | // and a trap, since there should be no callable path here. | |||
| 1369 | SDValue Trap = DAG.getNode(ISD::TRAP, DL, MVT::Other, DAG.getEntryNode()); | |||
| 1370 | SDValue OutputChain = DAG.getNode(ISD::TokenFactor, DL, MVT::Other, | |||
| 1371 | Trap, DAG.getRoot()); | |||
| 1372 | DAG.setRoot(OutputChain); | |||
| 1373 | return DAG.getUNDEF(Op.getValueType()); | |||
| 1374 | } | |||
| 1375 | ||||
| 1376 | // XXX: What does the value of G->getOffset() mean? | |||
| 1377 | assert(G->getOffset() == 0 &&((void)0) | |||
| 1378 | "Do not know what to do with an non-zero offset")((void)0); | |||
| 1379 | ||||
| 1380 | // TODO: We could emit code to handle the initialization somewhere. | |||
| 1381 | if (!hasDefinedInitializer(GV)) { | |||
| 1382 | unsigned Offset = MFI->allocateLDSGlobal(DL, *cast<GlobalVariable>(GV)); | |||
| 1383 | return DAG.getConstant(Offset, SDLoc(Op), Op.getValueType()); | |||
| 1384 | } | |||
| 1385 | } | |||
| 1386 | ||||
| 1387 | const Function &Fn = DAG.getMachineFunction().getFunction(); | |||
| 1388 | DiagnosticInfoUnsupported BadInit( | |||
| 1389 | Fn, "unsupported initializer for address space", SDLoc(Op).getDebugLoc()); | |||
| 1390 | DAG.getContext()->diagnose(BadInit); | |||
| 1391 | return SDValue(); | |||
| 1392 | } | |||
| 1393 | ||||
| 1394 | SDValue AMDGPUTargetLowering::LowerCONCAT_VECTORS(SDValue Op, | |||
| 1395 | SelectionDAG &DAG) const { | |||
| 1396 | SmallVector<SDValue, 8> Args; | |||
| 1397 | ||||
| 1398 | EVT VT = Op.getValueType(); | |||
| 1399 | if (VT == MVT::v4i16 || VT == MVT::v4f16) { | |||
| 1400 | SDLoc SL(Op); | |||
| 1401 | SDValue Lo = DAG.getNode(ISD::BITCAST, SL, MVT::i32, Op.getOperand(0)); | |||
| 1402 | SDValue Hi = DAG.getNode(ISD::BITCAST, SL, MVT::i32, Op.getOperand(1)); | |||
| 1403 | ||||
| 1404 | SDValue BV = DAG.getBuildVector(MVT::v2i32, SL, { Lo, Hi }); | |||
| 1405 | return DAG.getNode(ISD::BITCAST, SL, VT, BV); | |||
| 1406 | } | |||
| 1407 | ||||
| 1408 | for (const SDUse &U : Op->ops()) | |||
| 1409 | DAG.ExtractVectorElements(U.get(), Args); | |||
| 1410 | ||||
| 1411 | return DAG.getBuildVector(Op.getValueType(), SDLoc(Op), Args); | |||
| 1412 | } | |||
| 1413 | ||||
| 1414 | SDValue AMDGPUTargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op, | |||
| 1415 | SelectionDAG &DAG) const { | |||
| 1416 | ||||
| 1417 | SmallVector<SDValue, 8> Args; | |||
| 1418 | unsigned Start = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue(); | |||
| 1419 | EVT VT = Op.getValueType(); | |||
| 1420 | EVT SrcVT = Op.getOperand(0).getValueType(); | |||
| 1421 | ||||
| 1422 | // For these types, we have some TableGen patterns except if the index is 1 | |||
| 1423 | if (((SrcVT == MVT::v4f16 && VT == MVT::v2f16) || | |||
| 1424 | (SrcVT == MVT::v4i16 && VT == MVT::v2i16)) && | |||
| 1425 | Start != 1) | |||
| 1426 | return Op; | |||
| 1427 | ||||
| 1428 | DAG.ExtractVectorElements(Op.getOperand(0), Args, Start, | |||
| 1429 | VT.getVectorNumElements()); | |||
| 1430 | ||||
| 1431 | return DAG.getBuildVector(Op.getValueType(), SDLoc(Op), Args); | |||
| 1432 | } | |||
| 1433 | ||||
| 1434 | /// Generate Min/Max node | |||
| 1435 | SDValue AMDGPUTargetLowering::combineFMinMaxLegacy(const SDLoc &DL, EVT VT, | |||
| 1436 | SDValue LHS, SDValue RHS, | |||
| 1437 | SDValue True, SDValue False, | |||
| 1438 | SDValue CC, | |||
| 1439 | DAGCombinerInfo &DCI) const { | |||
| 1440 | if (!(LHS == True && RHS == False) && !(LHS == False && RHS == True)) | |||
| 1441 | return SDValue(); | |||
| 1442 | ||||
| 1443 | SelectionDAG &DAG = DCI.DAG; | |||
| 1444 | ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get(); | |||
| 1445 | switch (CCOpcode) { | |||
| 1446 | case ISD::SETOEQ: | |||
| 1447 | case ISD::SETONE: | |||
| 1448 | case ISD::SETUNE: | |||
| 1449 | case ISD::SETNE: | |||
| 1450 | case ISD::SETUEQ: | |||
| 1451 | case ISD::SETEQ: | |||
| 1452 | case ISD::SETFALSE: | |||
| 1453 | case ISD::SETFALSE2: | |||
| 1454 | case ISD::SETTRUE: | |||
| 1455 | case ISD::SETTRUE2: | |||
| 1456 | case ISD::SETUO: | |||
| 1457 | case ISD::SETO: | |||
| 1458 | break; | |||
| 1459 | case ISD::SETULE: | |||
| 1460 | case ISD::SETULT: { | |||
| 1461 | if (LHS == True) | |||
| 1462 | return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, RHS, LHS); | |||
| 1463 | return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, LHS, RHS); | |||
| 1464 | } | |||
| 1465 | case ISD::SETOLE: | |||
| 1466 | case ISD::SETOLT: | |||
| 1467 | case ISD::SETLE: | |||
| 1468 | case ISD::SETLT: { | |||
| 1469 | // Ordered. Assume ordered for undefined. | |||
| 1470 | ||||
| 1471 | // Only do this after legalization to avoid interfering with other combines | |||
| 1472 | // which might occur. | |||
| 1473 | if (DCI.getDAGCombineLevel() < AfterLegalizeDAG && | |||
| 1474 | !DCI.isCalledByLegalizer()) | |||
| 1475 | return SDValue(); | |||
| 1476 | ||||
| 1477 | // We need to permute the operands to get the correct NaN behavior. The | |||
| 1478 | // selected operand is the second one based on the failing compare with NaN, | |||
| 1479 | // so permute it based on the compare type the hardware uses. | |||
| 1480 | if (LHS == True) | |||
| 1481 | return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, LHS, RHS); | |||
| 1482 | return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, RHS, LHS); | |||
| 1483 | } | |||
| 1484 | case ISD::SETUGE: | |||
| 1485 | case ISD::SETUGT: { | |||
| 1486 | if (LHS == True) | |||
| 1487 | return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, RHS, LHS); | |||
| 1488 | return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, LHS, RHS); | |||
| 1489 | } | |||
| 1490 | case ISD::SETGT: | |||
| 1491 | case ISD::SETGE: | |||
| 1492 | case ISD::SETOGE: | |||
| 1493 | case ISD::SETOGT: { | |||
| 1494 | if (DCI.getDAGCombineLevel() < AfterLegalizeDAG && | |||
| 1495 | !DCI.isCalledByLegalizer()) | |||
| 1496 | return SDValue(); | |||
| 1497 | ||||
| 1498 | if (LHS == True) | |||
| 1499 | return DAG.getNode(AMDGPUISD::FMAX_LEGACY, DL, VT, LHS, RHS); | |||
| 1500 | return DAG.getNode(AMDGPUISD::FMIN_LEGACY, DL, VT, RHS, LHS); | |||
| 1501 | } | |||
| 1502 | case ISD::SETCC_INVALID: | |||
| 1503 | llvm_unreachable("Invalid setcc condcode!")__builtin_unreachable(); | |||
| 1504 | } | |||
| 1505 | return SDValue(); | |||
| 1506 | } | |||
| 1507 | ||||
| 1508 | std::pair<SDValue, SDValue> | |||
| 1509 | AMDGPUTargetLowering::split64BitValue(SDValue Op, SelectionDAG &DAG) const { | |||
| 1510 | SDLoc SL(Op); | |||
| 1511 | ||||
| 1512 | SDValue Vec = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Op); | |||
| 1513 | ||||
| 1514 | const SDValue Zero = DAG.getConstant(0, SL, MVT::i32); | |||
| 1515 | const SDValue One = DAG.getConstant(1, SL, MVT::i32); | |||
| 1516 | ||||
| 1517 | SDValue Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, Vec, Zero); | |||
| 1518 | SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, Vec, One); | |||
| 1519 | ||||
| 1520 | return std::make_pair(Lo, Hi); | |||
| 1521 | } | |||
| 1522 | ||||
| 1523 | SDValue AMDGPUTargetLowering::getLoHalf64(SDValue Op, SelectionDAG &DAG) const { | |||
| 1524 | SDLoc SL(Op); | |||
| 1525 | ||||
| 1526 | SDValue Vec = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Op); | |||
| 1527 | const SDValue Zero = DAG.getConstant(0, SL, MVT::i32); | |||
| 1528 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, Vec, Zero); | |||
| 1529 | } | |||
| 1530 | ||||
| 1531 | SDValue AMDGPUTargetLowering::getHiHalf64(SDValue Op, SelectionDAG &DAG) const { | |||
| 1532 | SDLoc SL(Op); | |||
| 1533 | ||||
| 1534 | SDValue Vec = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Op); | |||
| 1535 | const SDValue One = DAG.getConstant(1, SL, MVT::i32); | |||
| 1536 | return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, Vec, One); | |||
| 1537 | } | |||
| 1538 | ||||
| 1539 | // Split a vector type into two parts. The first part is a power of two vector. | |||
| 1540 | // The second part is whatever is left over, and is a scalar if it would | |||
| 1541 | // otherwise be a 1-vector. | |||
| 1542 | std::pair<EVT, EVT> | |||
| 1543 | AMDGPUTargetLowering::getSplitDestVTs(const EVT &VT, SelectionDAG &DAG) const { | |||
| 1544 | EVT LoVT, HiVT; | |||
| 1545 | EVT EltVT = VT.getVectorElementType(); | |||
| 1546 | unsigned NumElts = VT.getVectorNumElements(); | |||
| 1547 | unsigned LoNumElts = PowerOf2Ceil((NumElts + 1) / 2); | |||
| 1548 | LoVT = EVT::getVectorVT(*DAG.getContext(), EltVT, LoNumElts); | |||
| 1549 | HiVT = NumElts - LoNumElts == 1 | |||
| 1550 | ? EltVT | |||
| 1551 | : EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts - LoNumElts); | |||
| 1552 | return std::make_pair(LoVT, HiVT); | |||
| 1553 | } | |||
| 1554 | ||||
| 1555 | // Split a vector value into two parts of types LoVT and HiVT. HiVT could be | |||
| 1556 | // scalar. | |||
| 1557 | std::pair<SDValue, SDValue> | |||
| 1558 | AMDGPUTargetLowering::splitVector(const SDValue &N, const SDLoc &DL, | |||
| 1559 | const EVT &LoVT, const EVT &HiVT, | |||
| 1560 | SelectionDAG &DAG) const { | |||
| 1561 | assert(LoVT.getVectorNumElements() +((void)0) | |||
| 1562 | (HiVT.isVector() ? HiVT.getVectorNumElements() : 1) <=((void)0) | |||
| 1563 | N.getValueType().getVectorNumElements() &&((void)0) | |||
| 1564 | "More vector elements requested than available!")((void)0); | |||
| 1565 | SDValue Lo = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, LoVT, N, | |||
| 1566 | DAG.getVectorIdxConstant(0, DL)); | |||
| 1567 | SDValue Hi = DAG.getNode( | |||
| 1568 | HiVT.isVector() ? ISD::EXTRACT_SUBVECTOR : ISD::EXTRACT_VECTOR_ELT, DL, | |||
| 1569 | HiVT, N, DAG.getVectorIdxConstant(LoVT.getVectorNumElements(), DL)); | |||
| 1570 | return std::make_pair(Lo, Hi); | |||
| 1571 | } | |||
| 1572 | ||||
| 1573 | SDValue AMDGPUTargetLowering::SplitVectorLoad(const SDValue Op, | |||
| 1574 | SelectionDAG &DAG) const { | |||
| 1575 | LoadSDNode *Load = cast<LoadSDNode>(Op); | |||
| 1576 | EVT VT = Op.getValueType(); | |||
| 1577 | SDLoc SL(Op); | |||
| 1578 | ||||
| 1579 | ||||
| 1580 | // If this is a 2 element vector, we really want to scalarize and not create | |||
| 1581 | // weird 1 element vectors. | |||
| 1582 | if (VT.getVectorNumElements() == 2) { | |||
| 1583 | SDValue Ops[2]; | |||
| 1584 | std::tie(Ops[0], Ops[1]) = scalarizeVectorLoad(Load, DAG); | |||
| 1585 | return DAG.getMergeValues(Ops, SL); | |||
| 1586 | } | |||
| 1587 | ||||
| 1588 | SDValue BasePtr = Load->getBasePtr(); | |||
| 1589 | EVT MemVT = Load->getMemoryVT(); | |||
| 1590 | ||||
| 1591 | const MachinePointerInfo &SrcValue = Load->getMemOperand()->getPointerInfo(); | |||
| 1592 | ||||
| 1593 | EVT LoVT, HiVT; | |||
| 1594 | EVT LoMemVT, HiMemVT; | |||
| 1595 | SDValue Lo, Hi; | |||
| 1596 | ||||
| 1597 | std::tie(LoVT, HiVT) = getSplitDestVTs(VT, DAG); | |||
| 1598 | std::tie(LoMemVT, HiMemVT) = getSplitDestVTs(MemVT, DAG); | |||
| 1599 | std::tie(Lo, Hi) = splitVector(Op, SL, LoVT, HiVT, DAG); | |||
| 1600 | ||||
| 1601 | unsigned Size = LoMemVT.getStoreSize(); | |||
| 1602 | unsigned BaseAlign = Load->getAlignment(); | |||
| 1603 | unsigned HiAlign = MinAlign(BaseAlign, Size); | |||
| 1604 | ||||
| 1605 | SDValue LoLoad = DAG.getExtLoad(Load->getExtensionType(), SL, LoVT, | |||
| 1606 | Load->getChain(), BasePtr, SrcValue, LoMemVT, | |||
| 1607 | BaseAlign, Load->getMemOperand()->getFlags()); | |||
| 1608 | SDValue HiPtr = DAG.getObjectPtrOffset(SL, BasePtr, TypeSize::Fixed(Size)); | |||
| 1609 | SDValue HiLoad = | |||
| 1610 | DAG.getExtLoad(Load->getExtensionType(), SL, HiVT, Load->getChain(), | |||
| 1611 | HiPtr, SrcValue.getWithOffset(LoMemVT.getStoreSize()), | |||
| 1612 | HiMemVT, HiAlign, Load->getMemOperand()->getFlags()); | |||
| 1613 | ||||
| 1614 | SDValue Join; | |||
| 1615 | if (LoVT == HiVT) { | |||
| 1616 | // This is the case that the vector is power of two so was evenly split. | |||
| 1617 | Join = DAG.getNode(ISD::CONCAT_VECTORS, SL, VT, LoLoad, HiLoad); | |||
| 1618 | } else { | |||
| 1619 | Join = DAG.getNode(ISD::INSERT_SUBVECTOR, SL, VT, DAG.getUNDEF(VT), LoLoad, | |||
| 1620 | DAG.getVectorIdxConstant(0, SL)); | |||
| 1621 | Join = DAG.getNode( | |||
| 1622 | HiVT.isVector() ? ISD::INSERT_SUBVECTOR : ISD::INSERT_VECTOR_ELT, SL, | |||
| 1623 | VT, Join, HiLoad, | |||
| 1624 | DAG.getVectorIdxConstant(LoVT.getVectorNumElements(), SL)); | |||
| 1625 | } | |||
| 1626 | ||||
| 1627 | SDValue Ops[] = {Join, DAG.getNode(ISD::TokenFactor, SL, MVT::Other, | |||
| 1628 | LoLoad.getValue(1), HiLoad.getValue(1))}; | |||
| 1629 | ||||
| 1630 | return DAG.getMergeValues(Ops, SL); | |||
| 1631 | } | |||
| 1632 | ||||
| 1633 | SDValue AMDGPUTargetLowering::WidenOrSplitVectorLoad(SDValue Op, | |||
| 1634 | SelectionDAG &DAG) const { | |||
| 1635 | LoadSDNode *Load = cast<LoadSDNode>(Op); | |||
| 1636 | EVT VT = Op.getValueType(); | |||
| 1637 | SDValue BasePtr = Load->getBasePtr(); | |||
| 1638 | EVT MemVT = Load->getMemoryVT(); | |||
| 1639 | SDLoc SL(Op); | |||
| 1640 | const MachinePointerInfo &SrcValue = Load->getMemOperand()->getPointerInfo(); | |||
| 1641 | unsigned BaseAlign = Load->getAlignment(); | |||
| 1642 | unsigned NumElements = MemVT.getVectorNumElements(); | |||
| 1643 | ||||
| 1644 | // Widen from vec3 to vec4 when the load is at least 8-byte aligned | |||
| 1645 | // or 16-byte fully dereferenceable. Otherwise, split the vector load. | |||
| 1646 | if (NumElements != 3 || | |||
| 1647 | (BaseAlign < 8 && | |||
| 1648 | !SrcValue.isDereferenceable(16, *DAG.getContext(), DAG.getDataLayout()))) | |||
| 1649 | return SplitVectorLoad(Op, DAG); | |||
| 1650 | ||||
| 1651 | assert(NumElements == 3)((void)0); | |||
| 1652 | ||||
| 1653 | EVT WideVT = | |||
| 1654 | EVT::getVectorVT(*DAG.getContext(), VT.getVectorElementType(), 4); | |||
| 1655 | EVT WideMemVT = | |||
| 1656 | EVT::getVectorVT(*DAG.getContext(), MemVT.getVectorElementType(), 4); | |||
| 1657 | SDValue WideLoad = DAG.getExtLoad( | |||
| 1658 | Load->getExtensionType(), SL, WideVT, Load->getChain(), BasePtr, SrcValue, | |||
| 1659 | WideMemVT, BaseAlign, Load->getMemOperand()->getFlags()); | |||
| 1660 | return DAG.getMergeValues( | |||
| 1661 | {DAG.getNode(ISD::EXTRACT_SUBVECTOR, SL, VT, WideLoad, | |||
| 1662 | DAG.getVectorIdxConstant(0, SL)), | |||
| 1663 | WideLoad.getValue(1)}, | |||
| 1664 | SL); | |||
| 1665 | } | |||
| 1666 | ||||
| 1667 | SDValue AMDGPUTargetLowering::SplitVectorStore(SDValue Op, | |||
| 1668 | SelectionDAG &DAG) const { | |||
| 1669 | StoreSDNode *Store = cast<StoreSDNode>(Op); | |||
| 1670 | SDValue Val = Store->getValue(); | |||
| 1671 | EVT VT = Val.getValueType(); | |||
| 1672 | ||||
| 1673 | // If this is a 2 element vector, we really want to scalarize and not create | |||
| 1674 | // weird 1 element vectors. | |||
| 1675 | if (VT.getVectorNumElements() == 2) | |||
| 1676 | return scalarizeVectorStore(Store, DAG); | |||
| 1677 | ||||
| 1678 | EVT MemVT = Store->getMemoryVT(); | |||
| 1679 | SDValue Chain = Store->getChain(); | |||
| 1680 | SDValue BasePtr = Store->getBasePtr(); | |||
| 1681 | SDLoc SL(Op); | |||
| 1682 | ||||
| 1683 | EVT LoVT, HiVT; | |||
| 1684 | EVT LoMemVT, HiMemVT; | |||
| 1685 | SDValue Lo, Hi; | |||
| 1686 | ||||
| 1687 | std::tie(LoVT, HiVT) = getSplitDestVTs(VT, DAG); | |||
| 1688 | std::tie(LoMemVT, HiMemVT) = getSplitDestVTs(MemVT, DAG); | |||
| 1689 | std::tie(Lo, Hi) = splitVector(Val, SL, LoVT, HiVT, DAG); | |||
| 1690 | ||||
| 1691 | SDValue HiPtr = DAG.getObjectPtrOffset(SL, BasePtr, LoMemVT.getStoreSize()); | |||
| 1692 | ||||
| 1693 | const MachinePointerInfo &SrcValue = Store->getMemOperand()->getPointerInfo(); | |||
| 1694 | unsigned BaseAlign = Store->getAlignment(); | |||
| 1695 | unsigned Size = LoMemVT.getStoreSize(); | |||
| 1696 | unsigned HiAlign = MinAlign(BaseAlign, Size); | |||
| 1697 | ||||
| 1698 | SDValue LoStore = | |||
| 1699 | DAG.getTruncStore(Chain, SL, Lo, BasePtr, SrcValue, LoMemVT, BaseAlign, | |||
| 1700 | Store->getMemOperand()->getFlags()); | |||
| 1701 | SDValue HiStore = | |||
| 1702 | DAG.getTruncStore(Chain, SL, Hi, HiPtr, SrcValue.getWithOffset(Size), | |||
| 1703 | HiMemVT, HiAlign, Store->getMemOperand()->getFlags()); | |||
| 1704 | ||||
| 1705 | return DAG.getNode(ISD::TokenFactor, SL, MVT::Other, LoStore, HiStore); | |||
| 1706 | } | |||
| 1707 | ||||
| 1708 | // This is a shortcut for integer division because we have fast i32<->f32 | |||
| 1709 | // conversions, and fast f32 reciprocal instructions. The fractional part of a | |||
| 1710 | // float is enough to accurately represent up to a 24-bit signed integer. | |||
| 1711 | SDValue AMDGPUTargetLowering::LowerDIVREM24(SDValue Op, SelectionDAG &DAG, | |||
| 1712 | bool Sign) const { | |||
| 1713 | SDLoc DL(Op); | |||
| 1714 | EVT VT = Op.getValueType(); | |||
| 1715 | SDValue LHS = Op.getOperand(0); | |||
| 1716 | SDValue RHS = Op.getOperand(1); | |||
| 1717 | MVT IntVT = MVT::i32; | |||
| 1718 | MVT FltVT = MVT::f32; | |||
| 1719 | ||||
| 1720 | unsigned LHSSignBits = DAG.ComputeNumSignBits(LHS); | |||
| 1721 | if (LHSSignBits < 9) | |||
| 1722 | return SDValue(); | |||
| 1723 | ||||
| 1724 | unsigned RHSSignBits = DAG.ComputeNumSignBits(RHS); | |||
| 1725 | if (RHSSignBits < 9) | |||
| 1726 | return SDValue(); | |||
| 1727 | ||||
| 1728 | unsigned BitSize = VT.getSizeInBits(); | |||
| 1729 | unsigned SignBits = std::min(LHSSignBits, RHSSignBits); | |||
| 1730 | unsigned DivBits = BitSize - SignBits; | |||
| 1731 | if (Sign) | |||
| 1732 | ++DivBits; | |||
| 1733 | ||||
| 1734 | ISD::NodeType ToFp = Sign ? ISD::SINT_TO_FP : ISD::UINT_TO_FP; | |||
| 1735 | ISD::NodeType ToInt = Sign ? ISD::FP_TO_SINT : ISD::FP_TO_UINT; | |||
| 1736 | ||||
| 1737 | SDValue jq = DAG.getConstant(1, DL, IntVT); | |||
| 1738 | ||||
| 1739 | if (Sign) { | |||
| 1740 | // char|short jq = ia ^ ib; | |||
| 1741 | jq = DAG.getNode(ISD::XOR, DL, VT, LHS, RHS); | |||
| 1742 | ||||
| 1743 | // jq = jq >> (bitsize - 2) | |||
| 1744 | jq = DAG.getNode(ISD::SRA, DL, VT, jq, | |||
| 1745 | DAG.getConstant(BitSize - 2, DL, VT)); | |||
| 1746 | ||||
| 1747 | // jq = jq | 0x1 | |||
| 1748 | jq = DAG.getNode(ISD::OR, DL, VT, jq, DAG.getConstant(1, DL, VT)); | |||
| 1749 | } | |||
| 1750 | ||||
| 1751 | // int ia = (int)LHS; | |||
| 1752 | SDValue ia = LHS; | |||
| 1753 | ||||
| 1754 | // int ib, (int)RHS; | |||
| 1755 | SDValue ib = RHS; | |||
| 1756 | ||||
| 1757 | // float fa = (float)ia; | |||
| 1758 | SDValue fa = DAG.getNode(ToFp, DL, FltVT, ia); | |||
| 1759 | ||||
| 1760 | // float fb = (float)ib; | |||
| 1761 | SDValue fb = DAG.getNode(ToFp, DL, FltVT, ib); | |||
| 1762 | ||||
| 1763 | SDValue fq = DAG.getNode(ISD::FMUL, DL, FltVT, | |||
| 1764 | fa, DAG.getNode(AMDGPUISD::RCP, DL, FltVT, fb)); | |||
| 1765 | ||||
| 1766 | // fq = trunc(fq); | |||
| 1767 | fq = DAG.getNode(ISD::FTRUNC, DL, FltVT, fq); | |||
| 1768 | ||||
| 1769 | // float fqneg = -fq; | |||
| 1770 | SDValue fqneg = DAG.getNode(ISD::FNEG, DL, FltVT, fq); | |||
| 1771 | ||||
| 1772 | MachineFunction &MF = DAG.getMachineFunction(); | |||
| 1773 | const AMDGPUMachineFunction *MFI = MF.getInfo<AMDGPUMachineFunction>(); | |||
| 1774 | ||||
| 1775 | // float fr = mad(fqneg, fb, fa); | |||
| 1776 | unsigned OpCode = !Subtarget->hasMadMacF32Insts() ? | |||
| 1777 | (unsigned)ISD::FMA : | |||
| 1778 | !MFI->getMode().allFP32Denormals() ? | |||
| 1779 | (unsigned)ISD::FMAD : | |||
| 1780 | (unsigned)AMDGPUISD::FMAD_FTZ; | |||
| 1781 | SDValue fr = DAG.getNode(OpCode, DL, FltVT, fqneg, fb, fa); | |||
| 1782 | ||||
| 1783 | // int iq = (int)fq; | |||
| 1784 | SDValue iq = DAG.getNode(ToInt, DL, IntVT, fq); | |||
| 1785 | ||||
| 1786 | // fr = fabs(fr); | |||
| 1787 | fr = DAG.getNode(ISD::FABS, DL, FltVT, fr); | |||
| 1788 | ||||
| 1789 | // fb = fabs(fb); | |||
| 1790 | fb = DAG.getNode(ISD::FABS, DL, FltVT, fb); | |||
| 1791 | ||||
| 1792 | EVT SetCCVT = getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT); | |||
| 1793 | ||||
| 1794 | // int cv = fr >= fb; | |||
| 1795 | SDValue cv = DAG.getSetCC(DL, SetCCVT, fr, fb, ISD::SETOGE); | |||
| 1796 | ||||
| 1797 | // jq = (cv ? jq : 0); | |||
| 1798 | jq = DAG.getNode(ISD::SELECT, DL, VT, cv, jq, DAG.getConstant(0, DL, VT)); | |||
| 1799 | ||||
| 1800 | // dst = iq + jq; | |||
| 1801 | SDValue Div = DAG.getNode(ISD::ADD, DL, VT, iq, jq); | |||
| 1802 | ||||
| 1803 | // Rem needs compensation, it's easier to recompute it | |||
| 1804 | SDValue Rem = DAG.getNode(ISD::MUL, DL, VT, Div, RHS); | |||
| 1805 | Rem = DAG.getNode(ISD::SUB, DL, VT, LHS, Rem); | |||
| 1806 | ||||
| 1807 | // Truncate to number of bits this divide really is. | |||
| 1808 | if (Sign) { | |||
| 1809 | SDValue InRegSize | |||
| 1810 | = DAG.getValueType(EVT::getIntegerVT(*DAG.getContext(), DivBits)); | |||
| 1811 | Div = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT, Div, InRegSize); | |||
| 1812 | Rem = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, VT, Rem, InRegSize); | |||
| 1813 | } else { | |||
| 1814 | SDValue TruncMask = DAG.getConstant((UINT64_C(1)1ULL << DivBits) - 1, DL, VT); | |||
| 1815 | Div = DAG.getNode(ISD::AND, DL, VT, Div, TruncMask); | |||
| 1816 | Rem = DAG.getNode(ISD::AND, DL, VT, Rem, TruncMask); | |||
| 1817 | } | |||
| 1818 | ||||
| 1819 | return DAG.getMergeValues({ Div, Rem }, DL); | |||
| 1820 | } | |||
| 1821 | ||||
| 1822 | void AMDGPUTargetLowering::LowerUDIVREM64(SDValue Op, | |||
| 1823 | SelectionDAG &DAG, | |||
| 1824 | SmallVectorImpl<SDValue> &Results) const { | |||
| 1825 | SDLoc DL(Op); | |||
| 1826 | EVT VT = Op.getValueType(); | |||
| 1827 | ||||
| 1828 | assert(VT == MVT::i64 && "LowerUDIVREM64 expects an i64")((void)0); | |||
| 1829 | ||||
| 1830 | EVT HalfVT = VT.getHalfSizedIntegerVT(*DAG.getContext()); | |||
| 1831 | ||||
| 1832 | SDValue One = DAG.getConstant(1, DL, HalfVT); | |||
| 1833 | SDValue Zero = DAG.getConstant(0, DL, HalfVT); | |||
| 1834 | ||||
| 1835 | //HiLo split | |||
| 1836 | SDValue LHS = Op.getOperand(0); | |||
| 1837 | SDValue LHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, LHS, Zero); | |||
| 1838 | SDValue LHS_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, LHS, One); | |||
| 1839 | ||||
| 1840 | SDValue RHS = Op.getOperand(1); | |||
| 1841 | SDValue RHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, RHS, Zero); | |||
| 1842 | SDValue RHS_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, RHS, One); | |||
| 1843 | ||||
| 1844 | if (DAG.MaskedValueIsZero(RHS, APInt::getHighBitsSet(64, 32)) && | |||
| 1845 | DAG.MaskedValueIsZero(LHS, APInt::getHighBitsSet(64, 32))) { | |||
| 1846 | ||||
| 1847 | SDValue Res = DAG.getNode(ISD::UDIVREM, DL, DAG.getVTList(HalfVT, HalfVT), | |||
| 1848 | LHS_Lo, RHS_Lo); | |||
| 1849 | ||||
| 1850 | SDValue DIV = DAG.getBuildVector(MVT::v2i32, DL, {Res.getValue(0), Zero}); | |||
| 1851 | SDValue REM = DAG.getBuildVector(MVT::v2i32, DL, {Res.getValue(1), Zero}); | |||
| 1852 | ||||
| 1853 | Results.push_back(DAG.getNode(ISD::BITCAST, DL, MVT::i64, DIV)); | |||
| 1854 | Results.push_back(DAG.getNode(ISD::BITCAST, DL, MVT::i64, REM)); | |||
| 1855 | return; | |||
| 1856 | } | |||
| 1857 | ||||
| 1858 | if (isTypeLegal(MVT::i64)) { | |||
| 1859 | MachineFunction &MF = DAG.getMachineFunction(); | |||
| 1860 | const SIMachineFunctionInfo *MFI = MF.getInfo<SIMachineFunctionInfo>(); | |||
| 1861 | ||||
| 1862 | // Compute denominator reciprocal. | |||
| 1863 | unsigned FMAD = !Subtarget->hasMadMacF32Insts() ? | |||
| 1864 | (unsigned)ISD::FMA : | |||
| 1865 | !MFI->getMode().allFP32Denormals() ? | |||
| 1866 | (unsigned)ISD::FMAD : | |||
| 1867 | (unsigned)AMDGPUISD::FMAD_FTZ; | |||
| 1868 | ||||
| 1869 | SDValue Cvt_Lo = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, RHS_Lo); | |||
| 1870 | SDValue Cvt_Hi = DAG.getNode(ISD::UINT_TO_FP, DL, MVT::f32, RHS_Hi); | |||
| 1871 | SDValue Mad1 = DAG.getNode(FMAD, DL, MVT::f32, Cvt_Hi, | |||
| 1872 | DAG.getConstantFP(APInt(32, 0x4f800000).bitsToFloat(), DL, MVT::f32), | |||
| 1873 | Cvt_Lo); | |||
| 1874 | SDValue Rcp = DAG.getNode(AMDGPUISD::RCP, DL, MVT::f32, Mad1); | |||
| 1875 | SDValue Mul1 = DAG.getNode(ISD::FMUL, DL, MVT::f32, Rcp, | |||
| 1876 | DAG.getConstantFP(APInt(32, 0x5f7ffffc).bitsToFloat(), DL, MVT::f32)); | |||
| 1877 | SDValue Mul2 = DAG.getNode(ISD::FMUL, DL, MVT::f32, Mul1, | |||
| 1878 | DAG.getConstantFP(APInt(32, 0x2f800000).bitsToFloat(), DL, MVT::f32)); | |||
| 1879 | SDValue Trunc = DAG.getNode(ISD::FTRUNC, DL, MVT::f32, Mul2); | |||
| 1880 | SDValue Mad2 = DAG.getNode(FMAD, DL, MVT::f32, Trunc, | |||
| 1881 | DAG.getConstantFP(APInt(32, 0xcf800000).bitsToFloat(), DL, MVT::f32), | |||
| 1882 | Mul1); | |||
| 1883 | SDValue Rcp_Lo = DAG.getNode(ISD::FP_TO_UINT, DL, HalfVT, Mad2); | |||
| 1884 | SDValue Rcp_Hi = DAG.getNode(ISD::FP_TO_UINT, DL, HalfVT, Trunc); | |||
| 1885 | SDValue Rcp64 = DAG.getBitcast(VT, | |||
| 1886 | DAG.getBuildVector(MVT::v2i32, DL, {Rcp_Lo, Rcp_Hi})); | |||
| 1887 | ||||
| 1888 | SDValue Zero64 = DAG.getConstant(0, DL, VT); | |||
| 1889 | SDValue One64 = DAG.getConstant(1, DL, VT); | |||
| 1890 | SDValue Zero1 = DAG.getConstant(0, DL, MVT::i1); | |||
| 1891 | SDVTList HalfCarryVT = DAG.getVTList(HalfVT, MVT::i1); | |||
| 1892 | ||||
| 1893 | SDValue Neg_RHS = DAG.getNode(ISD::SUB, DL, VT, Zero64, RHS); | |||
| 1894 | SDValue Mullo1 = DAG.getNode(ISD::MUL, DL, VT, Neg_RHS, Rcp64); | |||
| 1895 | SDValue Mulhi1 = DAG.getNode(ISD::MULHU, DL, VT, Rcp64, Mullo1); | |||
| 1896 | SDValue Mulhi1_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, Mulhi1, | |||
| 1897 | Zero); | |||
| 1898 | SDValue Mulhi1_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, Mulhi1, | |||
| 1899 | One); | |||
| 1900 | ||||
| 1901 | SDValue Add1_Lo = DAG.getNode(ISD::ADDCARRY, DL, HalfCarryVT, Rcp_Lo, | |||
| 1902 | Mulhi1_Lo, Zero1); | |||
| 1903 | SDValue Add1_Hi = DAG.getNode(ISD::ADDCARRY, DL, HalfCarryVT, Rcp_Hi, | |||
| 1904 | Mulhi1_Hi, Add1_Lo.getValue(1)); | |||
| 1905 | SDValue Add1_HiNc = DAG.getNode(ISD::ADD, DL, HalfVT, Rcp_Hi, Mulhi1_Hi); | |||
| 1906 | SDValue Add1 = DAG.getBitcast(VT, | |||
| 1907 | DAG.getBuildVector(MVT::v2i32, DL, {Add1_Lo, Add1_Hi})); | |||
| 1908 | ||||
| 1909 | SDValue Mullo2 = DAG.getNode(ISD::MUL, DL, VT, Neg_RHS, Add1); | |||
| 1910 | SDValue Mulhi2 = DAG.getNode(ISD::MULHU, DL, VT, Add1, Mullo2); | |||
| 1911 | SDValue Mulhi2_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, Mulhi2, | |||
| 1912 | Zero); | |||
| 1913 | SDValue Mulhi2_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, Mulhi2, | |||
| 1914 | One); | |||
| 1915 | ||||
| 1916 | SDValue Add2_Lo = DAG.getNode(ISD::ADDCARRY, DL, HalfCarryVT, Add1_Lo, | |||
| 1917 | Mulhi2_Lo, Zero1); | |||
| 1918 | SDValue Add2_HiC = DAG.getNode(ISD::ADDCARRY, DL, HalfCarryVT, Add1_HiNc, | |||
| 1919 | Mulhi2_Hi, Add1_Lo.getValue(1)); | |||
| 1920 | SDValue Add2_Hi = DAG.getNode(ISD::ADDCARRY, DL, HalfCarryVT, Add2_HiC, | |||
| 1921 | Zero, Add2_Lo.getValue(1)); | |||
| 1922 | SDValue Add2 = DAG.getBitcast(VT, | |||
| 1923 | DAG.getBuildVector(MVT::v2i32, DL, {Add2_Lo, Add2_Hi})); | |||
| 1924 | SDValue Mulhi3 = DAG.getNode(ISD::MULHU, DL, VT, LHS, Add2); | |||
| 1925 | ||||
| 1926 | SDValue Mul3 = DAG.getNode(ISD::MUL, DL, VT, RHS, Mulhi3); | |||
| 1927 | ||||
| 1928 | SDValue Mul3_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, Mul3, Zero); | |||
| 1929 | SDValue Mul3_Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, Mul3, One); | |||
| 1930 | SDValue Sub1_Lo = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, LHS_Lo, | |||
| 1931 | Mul3_Lo, Zero1); | |||
| 1932 | SDValue Sub1_Hi = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, LHS_Hi, | |||
| 1933 | Mul3_Hi, Sub1_Lo.getValue(1)); | |||
| 1934 | SDValue Sub1_Mi = DAG.getNode(ISD::SUB, DL, HalfVT, LHS_Hi, Mul3_Hi); | |||
| 1935 | SDValue Sub1 = DAG.getBitcast(VT, | |||
| 1936 | DAG.getBuildVector(MVT::v2i32, DL, {Sub1_Lo, Sub1_Hi})); | |||
| 1937 | ||||
| 1938 | SDValue MinusOne = DAG.getConstant(0xffffffffu, DL, HalfVT); | |||
| 1939 | SDValue C1 = DAG.getSelectCC(DL, Sub1_Hi, RHS_Hi, MinusOne, Zero, | |||
| 1940 | ISD::SETUGE); | |||
| 1941 | SDValue C2 = DAG.getSelectCC(DL, Sub1_Lo, RHS_Lo, MinusOne, Zero, | |||
| 1942 | ISD::SETUGE); | |||
| 1943 | SDValue C3 = DAG.getSelectCC(DL, Sub1_Hi, RHS_Hi, C2, C1, ISD::SETEQ); | |||
| 1944 | ||||
| 1945 | // TODO: Here and below portions of the code can be enclosed into if/endif. | |||
| 1946 | // Currently control flow is unconditional and we have 4 selects after | |||
| 1947 | // potential endif to substitute PHIs. | |||
| 1948 | ||||
| 1949 | // if C3 != 0 ... | |||
| 1950 | SDValue Sub2_Lo = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, Sub1_Lo, | |||
| 1951 | RHS_Lo, Zero1); | |||
| 1952 | SDValue Sub2_Mi = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, Sub1_Mi, | |||
| 1953 | RHS_Hi, Sub1_Lo.getValue(1)); | |||
| 1954 | SDValue Sub2_Hi = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, Sub2_Mi, | |||
| 1955 | Zero, Sub2_Lo.getValue(1)); | |||
| 1956 | SDValue Sub2 = DAG.getBitcast(VT, | |||
| 1957 | DAG.getBuildVector(MVT::v2i32, DL, {Sub2_Lo, Sub2_Hi})); | |||
| 1958 | ||||
| 1959 | SDValue Add3 = DAG.getNode(ISD::ADD, DL, VT, Mulhi3, One64); | |||
| 1960 | ||||
| 1961 | SDValue C4 = DAG.getSelectCC(DL, Sub2_Hi, RHS_Hi, MinusOne, Zero, | |||
| 1962 | ISD::SETUGE); | |||
| 1963 | SDValue C5 = DAG.getSelectCC(DL, Sub2_Lo, RHS_Lo, MinusOne, Zero, | |||
| 1964 | ISD::SETUGE); | |||
| 1965 | SDValue C6 = DAG.getSelectCC(DL, Sub2_Hi, RHS_Hi, C5, C4, ISD::SETEQ); | |||
| 1966 | ||||
| 1967 | // if (C6 != 0) | |||
| 1968 | SDValue Add4 = DAG.getNode(ISD::ADD, DL, VT, Add3, One64); | |||
| 1969 | ||||
| 1970 | SDValue Sub3_Lo = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, Sub2_Lo, | |||
| 1971 | RHS_Lo, Zero1); | |||
| 1972 | SDValue Sub3_Mi = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, Sub2_Mi, | |||
| 1973 | RHS_Hi, Sub2_Lo.getValue(1)); | |||
| 1974 | SDValue Sub3_Hi = DAG.getNode(ISD::SUBCARRY, DL, HalfCarryVT, Sub3_Mi, | |||
| 1975 | Zero, Sub3_Lo.getValue(1)); | |||
| 1976 | SDValue Sub3 = DAG.getBitcast(VT, | |||
| 1977 | DAG.getBuildVector(MVT::v2i32, DL, {Sub3_Lo, Sub3_Hi})); | |||
| 1978 | ||||
| 1979 | // endif C6 | |||
| 1980 | // endif C3 | |||
| 1981 | ||||
| 1982 | SDValue Sel1 = DAG.getSelectCC(DL, C6, Zero, Add4, Add3, ISD::SETNE); | |||
| 1983 | SDValue Div = DAG.getSelectCC(DL, C3, Zero, Sel1, Mulhi3, ISD::SETNE); | |||
| 1984 | ||||
| 1985 | SDValue Sel2 = DAG.getSelectCC(DL, C6, Zero, Sub3, Sub2, ISD::SETNE); | |||
| 1986 | SDValue Rem = DAG.getSelectCC(DL, C3, Zero, Sel2, Sub1, ISD::SETNE); | |||
| 1987 | ||||
| 1988 | Results.push_back(Div); | |||
| 1989 | Results.push_back(Rem); | |||
| 1990 | ||||
| 1991 | return; | |||
| 1992 | } | |||
| 1993 | ||||
| 1994 | // r600 expandion. | |||
| 1995 | // Get Speculative values | |||
| 1996 | SDValue DIV_Part = DAG.getNode(ISD::UDIV, DL, HalfVT, LHS_Hi, RHS_Lo); | |||
| 1997 | SDValue REM_Part = DAG.getNode(ISD::UREM, DL, HalfVT, LHS_Hi, RHS_Lo); | |||
| 1998 | ||||
| 1999 | SDValue REM_Lo = DAG.getSelectCC(DL, RHS_Hi, Zero, REM_Part, LHS_Hi, ISD::SETEQ); | |||
| 2000 | SDValue REM = DAG.getBuildVector(MVT::v2i32, DL, {REM_Lo, Zero}); | |||
| 2001 | REM = DAG.getNode(ISD::BITCAST, DL, MVT::i64, REM); | |||
| 2002 | ||||
| 2003 | SDValue DIV_Hi = DAG.getSelectCC(DL, RHS_Hi, Zero, DIV_Part, Zero, ISD::SETEQ); | |||
| 2004 | SDValue DIV_Lo = Zero; | |||
| 2005 | ||||
| 2006 | const unsigned halfBitWidth = HalfVT.getSizeInBits(); | |||
| 2007 | ||||
| 2008 | for (unsigned i = 0; i < halfBitWidth; ++i) { | |||
| 2009 | const unsigned bitPos = halfBitWidth - i - 1; | |||
| 2010 | SDValue POS = DAG.getConstant(bitPos, DL, HalfVT); | |||
| 2011 | // Get value of high bit | |||
| 2012 | SDValue HBit = DAG.getNode(ISD::SRL, DL, HalfVT, LHS_Lo, POS); | |||
| 2013 | HBit = DAG.getNode(ISD::AND, DL, HalfVT, HBit, One); | |||
| 2014 | HBit = DAG.getNode(ISD::ZERO_EXTEND, DL, VT, HBit); | |||
| 2015 | ||||
| 2016 | // Shift | |||
| 2017 | REM = DAG.getNode(ISD::SHL, DL, VT, REM, DAG.getConstant(1, DL, VT)); | |||
| 2018 | // Add LHS high bit | |||
| 2019 | REM = DAG.getNode(ISD::OR, DL, VT, REM, HBit); | |||
| 2020 | ||||
| 2021 | SDValue BIT = DAG.getConstant(1ULL << bitPos, DL, HalfVT); | |||
| 2022 | SDValue realBIT = DAG.getSelectCC(DL, REM, RHS, BIT, Zero, ISD::SETUGE); | |||
| 2023 | ||||
| 2024 | DIV_Lo = DAG.getNode(ISD::OR, DL, HalfVT, DIV_Lo, realBIT); | |||
| 2025 | ||||
| 2026 | // Update REM | |||
| 2027 | SDValue REM_sub = DAG.getNode(ISD::SUB, DL, VT, REM, RHS); | |||
| 2028 | REM = DAG.getSelectCC(DL, REM, RHS, REM_sub, REM, ISD::SETUGE); | |||
| 2029 | } | |||
| 2030 | ||||
| 2031 | SDValue DIV = DAG.getBuildVector(MVT::v2i32, DL, {DIV_Lo, DIV_Hi}); | |||
| 2032 | DIV = DAG.getNode(ISD::BITCAST, DL, MVT::i64, DIV); | |||
| 2033 | Results.push_back(DIV); | |||
| 2034 | Results.push_back(REM); | |||
| 2035 | } | |||
| 2036 | ||||
| 2037 | SDValue AMDGPUTargetLowering::LowerUDIVREM(SDValue Op, | |||
| 2038 | SelectionDAG &DAG) const { | |||
| 2039 | SDLoc DL(Op); | |||
| 2040 | EVT VT = Op.getValueType(); | |||
| 2041 | ||||
| 2042 | if (VT == MVT::i64) { | |||
| 2043 | SmallVector<SDValue, 2> Results; | |||
| 2044 | LowerUDIVREM64(Op, DAG, Results); | |||
| 2045 | return DAG.getMergeValues(Results, DL); | |||
| 2046 | } | |||
| 2047 | ||||
| 2048 | if (VT == MVT::i32) { | |||
| 2049 | if (SDValue Res = LowerDIVREM24(Op, DAG, false)) | |||
| 2050 | return Res; | |||
| 2051 | } | |||
| 2052 | ||||
| 2053 | SDValue X = Op.getOperand(0); | |||
| 2054 | SDValue Y = Op.getOperand(1); | |||
| 2055 | ||||
| 2056 | // See AMDGPUCodeGenPrepare::expandDivRem32 for a description of the | |||
| 2057 | // algorithm used here. | |||
| 2058 | ||||
| 2059 | // Initial estimate of inv(y). | |||
| 2060 | SDValue Z = DAG.getNode(AMDGPUISD::URECIP, DL, VT, Y); | |||
| 2061 | ||||
| 2062 | // One round of UNR. | |||
| 2063 | SDValue NegY = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), Y); | |||
| 2064 | SDValue NegYZ = DAG.getNode(ISD::MUL, DL, VT, NegY, Z); | |||
| 2065 | Z = DAG.getNode(ISD::ADD, DL, VT, Z, | |||
| 2066 | DAG.getNode(ISD::MULHU, DL, VT, Z, NegYZ)); | |||
| 2067 | ||||
| 2068 | // Quotient/remainder estimate. | |||
| 2069 | SDValue Q = DAG.getNode(ISD::MULHU, DL, VT, X, Z); | |||
| 2070 | SDValue R = | |||
| 2071 | DAG.getNode(ISD::SUB, DL, VT, X, DAG.getNode(ISD::MUL, DL, VT, Q, Y)); | |||
| 2072 | ||||
| 2073 | // First quotient/remainder refinement. | |||
| 2074 | EVT CCVT = getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT); | |||
| 2075 | SDValue One = DAG.getConstant(1, DL, VT); | |||
| 2076 | SDValue Cond = DAG.getSetCC(DL, CCVT, R, Y, ISD::SETUGE); | |||
| 2077 | Q = DAG.getNode(ISD::SELECT, DL, VT, Cond, | |||
| 2078 | DAG.getNode(ISD::ADD, DL, VT, Q, One), Q); | |||
| 2079 | R = DAG.getNode(ISD::SELECT, DL, VT, Cond, | |||
| 2080 | DAG.getNode(ISD::SUB, DL, VT, R, Y), R); | |||
| 2081 | ||||
| 2082 | // Second quotient/remainder refinement. | |||
| 2083 | Cond = DAG.getSetCC(DL, CCVT, R, Y, ISD::SETUGE); | |||
| 2084 | Q = DAG.getNode(ISD::SELECT, DL, VT, Cond, | |||
| 2085 | DAG.getNode(ISD::ADD, DL, VT, Q, One), Q); | |||
| 2086 | R = DAG.getNode(ISD::SELECT, DL, VT, Cond, | |||
| 2087 | DAG.getNode(ISD::SUB, DL, VT, R, Y), R); | |||
| 2088 | ||||
| 2089 | return DAG.getMergeValues({Q, R}, DL); | |||
| 2090 | } | |||
| 2091 | ||||
| 2092 | SDValue AMDGPUTargetLowering::LowerSDIVREM(SDValue Op, | |||
| 2093 | SelectionDAG &DAG) const { | |||
| 2094 | SDLoc DL(Op); | |||
| 2095 | EVT VT = Op.getValueType(); | |||
| 2096 | ||||
| 2097 | SDValue LHS = Op.getOperand(0); | |||
| 2098 | SDValue RHS = Op.getOperand(1); | |||
| 2099 | ||||
| 2100 | SDValue Zero = DAG.getConstant(0, DL, VT); | |||
| 2101 | SDValue NegOne = DAG.getConstant(-1, DL, VT); | |||
| 2102 | ||||
| 2103 | if (VT == MVT::i32) { | |||
| 2104 | if (SDValue Res = LowerDIVREM24(Op, DAG, true)) | |||
| 2105 | return Res; | |||
| 2106 | } | |||
| 2107 | ||||
| 2108 | if (VT == MVT::i64 && | |||
| 2109 | DAG.ComputeNumSignBits(LHS) > 32 && | |||
| 2110 | DAG.ComputeNumSignBits(RHS) > 32) { | |||
| 2111 | EVT HalfVT = VT.getHalfSizedIntegerVT(*DAG.getContext()); | |||
| 2112 | ||||
| 2113 | //HiLo split | |||
| 2114 | SDValue LHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, LHS, Zero); | |||
| 2115 | SDValue RHS_Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DL, HalfVT, RHS, Zero); | |||
| 2116 | SDValue DIVREM = DAG.getNode(ISD::SDIVREM, DL, DAG.getVTList(HalfVT, HalfVT), | |||
| 2117 | LHS_Lo, RHS_Lo); | |||
| 2118 | SDValue Res[2] = { | |||
| 2119 | DAG.getNode(ISD::SIGN_EXTEND, DL, VT, DIVREM.getValue(0)), | |||
| 2120 | DAG.getNode(ISD::SIGN_EXTEND, DL, VT, DIVREM.getValue(1)) | |||
| 2121 | }; | |||
| 2122 | return DAG.getMergeValues(Res, DL); | |||
| 2123 | } | |||
| 2124 | ||||
| 2125 | SDValue LHSign = DAG.getSelectCC(DL, LHS, Zero, NegOne, Zero, ISD::SETLT); | |||
| 2126 | SDValue RHSign = DAG.getSelectCC(DL, RHS, Zero, NegOne, Zero, ISD::SETLT); | |||
| 2127 | SDValue DSign = DAG.getNode(ISD::XOR, DL, VT, LHSign, RHSign); | |||
| 2128 | SDValue RSign = LHSign; // Remainder sign is the same as LHS | |||
| 2129 | ||||
| 2130 | LHS = DAG.getNode(ISD::ADD, DL, VT, LHS, LHSign); | |||
| 2131 | RHS = DAG.getNode(ISD::ADD, DL, VT, RHS, RHSign); | |||
| 2132 | ||||
| 2133 | LHS = DAG.getNode(ISD::XOR, DL, VT, LHS, LHSign); | |||
| 2134 | RHS = DAG.getNode(ISD::XOR, DL, VT, RHS, RHSign); | |||
| 2135 | ||||
| 2136 | SDValue Div = DAG.getNode(ISD::UDIVREM, DL, DAG.getVTList(VT, VT), LHS, RHS); | |||
| 2137 | SDValue Rem = Div.getValue(1); | |||
| 2138 | ||||
| 2139 | Div = DAG.getNode(ISD::XOR, DL, VT, Div, DSign); | |||
| 2140 | Rem = DAG.getNode(ISD::XOR, DL, VT, Rem, RSign); | |||
| 2141 | ||||
| 2142 | Div = DAG.getNode(ISD::SUB, DL, VT, Div, DSign); | |||
| 2143 | Rem = DAG.getNode(ISD::SUB, DL, VT, Rem, RSign); | |||
| 2144 | ||||
| 2145 | SDValue Res[2] = { | |||
| 2146 | Div, | |||
| 2147 | Rem | |||
| 2148 | }; | |||
| 2149 | return DAG.getMergeValues(Res, DL); | |||
| 2150 | } | |||
| 2151 | ||||
| 2152 | // (frem x, y) -> (fma (fneg (ftrunc (fdiv x, y))), y, x) | |||
| 2153 | SDValue AMDGPUTargetLowering::LowerFREM(SDValue Op, SelectionDAG &DAG) const { | |||
| 2154 | SDLoc SL(Op); | |||
| 2155 | EVT VT = Op.getValueType(); | |||
| 2156 | auto Flags = Op->getFlags(); | |||
| 2157 | SDValue X = Op.getOperand(0); | |||
| 2158 | SDValue Y = Op.getOperand(1); | |||
| 2159 | ||||
| 2160 | SDValue Div = DAG.getNode(ISD::FDIV, SL, VT, X, Y, Flags); | |||
| 2161 | SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, VT, Div, Flags); | |||
| 2162 | SDValue Neg = DAG.getNode(ISD::FNEG, SL, VT, Trunc, Flags); | |||
| 2163 | // TODO: For f32 use FMAD instead if !hasFastFMA32? | |||
| 2164 | return DAG.getNode(ISD::FMA, SL, VT, Neg, Y, X, Flags); | |||
| 2165 | } | |||
| 2166 | ||||
| 2167 | SDValue AMDGPUTargetLowering::LowerFCEIL(SDValue Op, SelectionDAG &DAG) const { | |||
| 2168 | SDLoc SL(Op); | |||
| 2169 | SDValue Src = Op.getOperand(0); | |||
| 2170 | ||||
| 2171 | // result = trunc(src) | |||
| 2172 | // if (src > 0.0 && src != result) | |||
| 2173 | // result += 1.0 | |||
| 2174 | ||||
| 2175 | SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, MVT::f64, Src); | |||
| 2176 | ||||
| 2177 | const SDValue Zero = DAG.getConstantFP(0.0, SL, MVT::f64); | |||
| 2178 | const SDValue One = DAG.getConstantFP(1.0, SL, MVT::f64); | |||
| 2179 | ||||
| 2180 | EVT SetCCVT = | |||
| 2181 | getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), MVT::f64); | |||
| 2182 | ||||
| 2183 | SDValue Lt0 = DAG.getSetCC(SL, SetCCVT, Src, Zero, ISD::SETOGT); | |||
| 2184 | SDValue NeTrunc = DAG.getSetCC(SL, SetCCVT, Src, Trunc, ISD::SETONE); | |||
| 2185 | SDValue And = DAG.getNode(ISD::AND, SL, SetCCVT, Lt0, NeTrunc); | |||
| 2186 | ||||
| 2187 | SDValue Add = DAG.getNode(ISD::SELECT, SL, MVT::f64, And, One, Zero); | |||
| 2188 | // TODO: Should this propagate fast-math-flags? | |||
| 2189 | return DAG.getNode(ISD::FADD, SL, MVT::f64, Trunc, Add); | |||
| 2190 | } | |||
| 2191 | ||||
| 2192 | static SDValue extractF64Exponent(SDValue Hi, const SDLoc &SL, | |||
| 2193 | SelectionDAG &DAG) { | |||
| 2194 | const unsigned FractBits = 52; | |||
| 2195 | const unsigned ExpBits = 11; | |||
| 2196 | ||||
| 2197 | SDValue ExpPart = DAG.getNode(AMDGPUISD::BFE_U32, SL, MVT::i32, | |||
| 2198 | Hi, | |||
| 2199 | DAG.getConstant(FractBits - 32, SL, MVT::i32), | |||
| 2200 | DAG.getConstant(ExpBits, SL, MVT::i32)); | |||
| 2201 | SDValue Exp = DAG.getNode(ISD::SUB, SL, MVT::i32, ExpPart, | |||
| 2202 | DAG.getConstant(1023, SL, MVT::i32)); | |||
| 2203 | ||||
| 2204 | return Exp; | |||
| 2205 | } | |||
| 2206 | ||||
| 2207 | SDValue AMDGPUTargetLowering::LowerFTRUNC(SDValue Op, SelectionDAG &DAG) const { | |||
| 2208 | SDLoc SL(Op); | |||
| 2209 | SDValue Src = Op.getOperand(0); | |||
| 2210 | ||||
| 2211 | assert(Op.getValueType() == MVT::f64)((void)0); | |||
| 2212 | ||||
| 2213 | const SDValue Zero = DAG.getConstant(0, SL, MVT::i32); | |||
| 2214 | const SDValue One = DAG.getConstant(1, SL, MVT::i32); | |||
| 2215 | ||||
| 2216 | SDValue VecSrc = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Src); | |||
| 2217 | ||||
| 2218 | // Extract the upper half, since this is where we will find the sign and | |||
| 2219 | // exponent. | |||
| 2220 | SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, VecSrc, One); | |||
| 2221 | ||||
| 2222 | SDValue Exp = extractF64Exponent(Hi, SL, DAG); | |||
| 2223 | ||||
| 2224 | const unsigned FractBits = 52; | |||
| 2225 | ||||
| 2226 | // Extract the sign bit. | |||
| 2227 | const SDValue SignBitMask = DAG.getConstant(UINT32_C(1)1U << 31, SL, MVT::i32); | |||
| 2228 | SDValue SignBit = DAG.getNode(ISD::AND, SL, MVT::i32, Hi, SignBitMask); | |||
| 2229 | ||||
| 2230 | // Extend back to 64-bits. | |||
| 2231 | SDValue SignBit64 = DAG.getBuildVector(MVT::v2i32, SL, {Zero, SignBit}); | |||
| 2232 | SignBit64 = DAG.getNode(ISD::BITCAST, SL, MVT::i64, SignBit64); | |||
| 2233 | ||||
| 2234 | SDValue BcInt = DAG.getNode(ISD::BITCAST, SL, MVT::i64, Src); | |||
| 2235 | const SDValue FractMask | |||
| 2236 | = DAG.getConstant((UINT64_C(1)1ULL << FractBits) - 1, SL, MVT::i64); | |||
| 2237 | ||||
| 2238 | SDValue Shr = DAG.getNode(ISD::SRA, SL, MVT::i64, FractMask, Exp); | |||
| 2239 | SDValue Not = DAG.getNOT(SL, Shr, MVT::i64); | |||
| 2240 | SDValue Tmp0 = DAG.getNode(ISD::AND, SL, MVT::i64, BcInt, Not); | |||
| 2241 | ||||
| 2242 | EVT SetCCVT = | |||
| 2243 | getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), MVT::i32); | |||
| 2244 | ||||
| 2245 | const SDValue FiftyOne = DAG.getConstant(FractBits - 1, SL, MVT::i32); | |||
| 2246 | ||||
| 2247 | SDValue ExpLt0 = DAG.getSetCC(SL, SetCCVT, Exp, Zero, ISD::SETLT); | |||
| 2248 | SDValue ExpGt51 = DAG.getSetCC(SL, SetCCVT, Exp, FiftyOne, ISD::SETGT); | |||
| 2249 | ||||
| 2250 | SDValue Tmp1 = DAG.getNode(ISD::SELECT, SL, MVT::i64, ExpLt0, SignBit64, Tmp0); | |||
| 2251 | SDValue Tmp2 = DAG.getNode(ISD::SELECT, SL, MVT::i64, ExpGt51, BcInt, Tmp1); | |||
| 2252 | ||||
| 2253 | return DAG.getNode(ISD::BITCAST, SL, MVT::f64, Tmp2); | |||
| 2254 | } | |||
| 2255 | ||||
| 2256 | SDValue AMDGPUTargetLowering::LowerFRINT(SDValue Op, SelectionDAG &DAG) const { | |||
| 2257 | SDLoc SL(Op); | |||
| 2258 | SDValue Src = Op.getOperand(0); | |||
| 2259 | ||||
| 2260 | assert(Op.getValueType() == MVT::f64)((void)0); | |||
| 2261 | ||||
| 2262 | APFloat C1Val(APFloat::IEEEdouble(), "0x1.0p+52"); | |||
| 2263 | SDValue C1 = DAG.getConstantFP(C1Val, SL, MVT::f64); | |||
| 2264 | SDValue CopySign = DAG.getNode(ISD::FCOPYSIGN, SL, MVT::f64, C1, Src); | |||
| 2265 | ||||
| 2266 | // TODO: Should this propagate fast-math-flags? | |||
| 2267 | ||||
| 2268 | SDValue Tmp1 = DAG.getNode(ISD::FADD, SL, MVT::f64, Src, CopySign); | |||
| 2269 | SDValue Tmp2 = DAG.getNode(ISD::FSUB, SL, MVT::f64, Tmp1, CopySign); | |||
| 2270 | ||||
| 2271 | SDValue Fabs = DAG.getNode(ISD::FABS, SL, MVT::f64, Src); | |||
| 2272 | ||||
| 2273 | APFloat C2Val(APFloat::IEEEdouble(), "0x1.fffffffffffffp+51"); | |||
| 2274 | SDValue C2 = DAG.getConstantFP(C2Val, SL, MVT::f64); | |||
| 2275 | ||||
| 2276 | EVT SetCCVT = | |||
| 2277 | getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), MVT::f64); | |||
| 2278 | SDValue Cond = DAG.getSetCC(SL, SetCCVT, Fabs, C2, ISD::SETOGT); | |||
| 2279 | ||||
| 2280 | return DAG.getSelect(SL, MVT::f64, Cond, Src, Tmp2); | |||
| 2281 | } | |||
| 2282 | ||||
| 2283 | SDValue AMDGPUTargetLowering::LowerFNEARBYINT(SDValue Op, SelectionDAG &DAG) const { | |||
| 2284 | // FNEARBYINT and FRINT are the same, except in their handling of FP | |||
| 2285 | // exceptions. Those aren't really meaningful for us, and OpenCL only has | |||
| 2286 | // rint, so just treat them as equivalent. | |||
| 2287 | return DAG.getNode(ISD::FRINT, SDLoc(Op), Op.getValueType(), Op.getOperand(0)); | |||
| 2288 | } | |||
| 2289 | ||||
| 2290 | // XXX - May require not supporting f32 denormals? | |||
| 2291 | ||||
| 2292 | // Don't handle v2f16. The extra instructions to scalarize and repack around the | |||
| 2293 | // compare and vselect end up producing worse code than scalarizing the whole | |||
| 2294 | // operation. | |||
| 2295 | SDValue AMDGPUTargetLowering::LowerFROUND(SDValue Op, SelectionDAG &DAG) const { | |||
| 2296 | SDLoc SL(Op); | |||
| 2297 | SDValue X = Op.getOperand(0); | |||
| 2298 | EVT VT = Op.getValueType(); | |||
| 2299 | ||||
| 2300 | SDValue T = DAG.getNode(ISD::FTRUNC, SL, VT, X); | |||
| 2301 | ||||
| 2302 | // TODO: Should this propagate fast-math-flags? | |||
| 2303 | ||||
| 2304 | SDValue Diff = DAG.getNode(ISD::FSUB, SL, VT, X, T); | |||
| 2305 | ||||
| 2306 | SDValue AbsDiff = DAG.getNode(ISD::FABS, SL, VT, Diff); | |||
| 2307 | ||||
| 2308 | const SDValue Zero = DAG.getConstantFP(0.0, SL, VT); | |||
| 2309 | const SDValue One = DAG.getConstantFP(1.0, SL, VT); | |||
| 2310 | const SDValue Half = DAG.getConstantFP(0.5, SL, VT); | |||
| 2311 | ||||
| 2312 | SDValue SignOne = DAG.getNode(ISD::FCOPYSIGN, SL, VT, One, X); | |||
| 2313 | ||||
| 2314 | EVT SetCCVT = | |||
| 2315 | getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT); | |||
| 2316 | ||||
| 2317 | SDValue Cmp = DAG.getSetCC(SL, SetCCVT, AbsDiff, Half, ISD::SETOGE); | |||
| 2318 | ||||
| 2319 | SDValue Sel = DAG.getNode(ISD::SELECT, SL, VT, Cmp, SignOne, Zero); | |||
| 2320 | ||||
| 2321 | return DAG.getNode(ISD::FADD, SL, VT, T, Sel); | |||
| 2322 | } | |||
| 2323 | ||||
| 2324 | SDValue AMDGPUTargetLowering::LowerFFLOOR(SDValue Op, SelectionDAG &DAG) const { | |||
| 2325 | SDLoc SL(Op); | |||
| 2326 | SDValue Src = Op.getOperand(0); | |||
| 2327 | ||||
| 2328 | // result = trunc(src); | |||
| 2329 | // if (src < 0.0 && src != result) | |||
| 2330 | // result += -1.0. | |||
| 2331 | ||||
| 2332 | SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, MVT::f64, Src); | |||
| 2333 | ||||
| 2334 | const SDValue Zero = DAG.getConstantFP(0.0, SL, MVT::f64); | |||
| 2335 | const SDValue NegOne = DAG.getConstantFP(-1.0, SL, MVT::f64); | |||
| 2336 | ||||
| 2337 | EVT SetCCVT = | |||
| 2338 | getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), MVT::f64); | |||
| 2339 | ||||
| 2340 | SDValue Lt0 = DAG.getSetCC(SL, SetCCVT, Src, Zero, ISD::SETOLT); | |||
| 2341 | SDValue NeTrunc = DAG.getSetCC(SL, SetCCVT, Src, Trunc, ISD::SETONE); | |||
| 2342 | SDValue And = DAG.getNode(ISD::AND, SL, SetCCVT, Lt0, NeTrunc); | |||
| 2343 | ||||
| 2344 | SDValue Add = DAG.getNode(ISD::SELECT, SL, MVT::f64, And, NegOne, Zero); | |||
| 2345 | // TODO: Should this propagate fast-math-flags? | |||
| 2346 | return DAG.getNode(ISD::FADD, SL, MVT::f64, Trunc, Add); | |||
| 2347 | } | |||
| 2348 | ||||
| 2349 | SDValue AMDGPUTargetLowering::LowerFLOG(SDValue Op, SelectionDAG &DAG, | |||
| 2350 | double Log2BaseInverted) const { | |||
| 2351 | EVT VT = Op.getValueType(); | |||
| 2352 | ||||
| 2353 | SDLoc SL(Op); | |||
| 2354 | SDValue Operand = Op.getOperand(0); | |||
| 2355 | SDValue Log2Operand = DAG.getNode(ISD::FLOG2, SL, VT, Operand); | |||
| 2356 | SDValue Log2BaseInvertedOperand = DAG.getConstantFP(Log2BaseInverted, SL, VT); | |||
| 2357 | ||||
| 2358 | return DAG.getNode(ISD::FMUL, SL, VT, Log2Operand, Log2BaseInvertedOperand); | |||
| 2359 | } | |||
| 2360 | ||||
| 2361 | // exp2(M_LOG2E_F * f); | |||
| 2362 | SDValue AMDGPUTargetLowering::lowerFEXP(SDValue Op, SelectionDAG &DAG) const { | |||
| 2363 | EVT VT = Op.getValueType(); | |||
| 2364 | SDLoc SL(Op); | |||
| 2365 | SDValue Src = Op.getOperand(0); | |||
| 2366 | ||||
| 2367 | const SDValue K = DAG.getConstantFP(numbers::log2e, SL, VT); | |||
| 2368 | SDValue Mul = DAG.getNode(ISD::FMUL, SL, VT, Src, K, Op->getFlags()); | |||
| 2369 | return DAG.getNode(ISD::FEXP2, SL, VT, Mul, Op->getFlags()); | |||
| 2370 | } | |||
| 2371 | ||||
| 2372 | static bool isCtlzOpc(unsigned Opc) { | |||
| 2373 | return Opc == ISD::CTLZ || Opc == ISD::CTLZ_ZERO_UNDEF; | |||
| 2374 | } | |||
| 2375 | ||||
| 2376 | static bool isCttzOpc(unsigned Opc) { | |||
| 2377 | return Opc == ISD::CTTZ || Opc == ISD::CTTZ_ZERO_UNDEF; | |||
| 2378 | } | |||
| 2379 | ||||
| 2380 | SDValue AMDGPUTargetLowering::LowerCTLZ_CTTZ(SDValue Op, SelectionDAG &DAG) const { | |||
| 2381 | SDLoc SL(Op); | |||
| 2382 | SDValue Src = Op.getOperand(0); | |||
| 2383 | bool ZeroUndef = Op.getOpcode() == ISD::CTTZ_ZERO_UNDEF || | |||
| 2384 | Op.getOpcode() == ISD::CTLZ_ZERO_UNDEF; | |||
| 2385 | ||||
| 2386 | unsigned ISDOpc, NewOpc; | |||
| 2387 | if (isCtlzOpc(Op.getOpcode())) { | |||
| 2388 | ISDOpc = ISD::CTLZ_ZERO_UNDEF; | |||
| 2389 | NewOpc = AMDGPUISD::FFBH_U32; | |||
| 2390 | } else if (isCttzOpc(Op.getOpcode())) { | |||
| 2391 | ISDOpc = ISD::CTTZ_ZERO_UNDEF; | |||
| 2392 | NewOpc = AMDGPUISD::FFBL_B32; | |||
| 2393 | } else | |||
| 2394 | llvm_unreachable("Unexpected OPCode!!!")__builtin_unreachable(); | |||
| 2395 | ||||
| 2396 | ||||
| 2397 | if (ZeroUndef && Src.getValueType() == MVT::i32) | |||
| 2398 | return DAG.getNode(NewOpc, SL, MVT::i32, Src); | |||
| 2399 | ||||
| 2400 | SDValue Vec = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Src); | |||
| 2401 | ||||
| 2402 | const SDValue Zero = DAG.getConstant(0, SL, MVT::i32); | |||
| 2403 | const SDValue One = DAG.getConstant(1, SL, MVT::i32); | |||
| 2404 | ||||
| 2405 | SDValue Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, Vec, Zero); | |||
| 2406 | SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, Vec, One); | |||
| 2407 | ||||
| 2408 | EVT SetCCVT = getSetCCResultType(DAG.getDataLayout(), | |||
| 2409 | *DAG.getContext(), MVT::i32); | |||
| 2410 | ||||
| 2411 | SDValue HiOrLo = isCtlzOpc(Op.getOpcode()) ? Hi : Lo; | |||
| 2412 | SDValue Hi0orLo0 = DAG.getSetCC(SL, SetCCVT, HiOrLo, Zero, ISD::SETEQ); | |||
| 2413 | ||||
| 2414 | SDValue OprLo = DAG.getNode(ISDOpc, SL, MVT::i32, Lo); | |||
| 2415 | SDValue OprHi = DAG.getNode(ISDOpc, SL, MVT::i32, Hi); | |||
| 2416 | ||||
| 2417 | const SDValue Bits32 = DAG.getConstant(32, SL, MVT::i32); | |||
| 2418 | SDValue Add, NewOpr; | |||
| 2419 | if (isCtlzOpc(Op.getOpcode())) { | |||
| 2420 | Add = DAG.getNode(ISD::ADD, SL, MVT::i32, OprLo, Bits32); | |||
| 2421 | // ctlz(x) = hi_32(x) == 0 ? ctlz(lo_32(x)) + 32 : ctlz(hi_32(x)) | |||
| 2422 | NewOpr = DAG.getNode(ISD::SELECT, SL, MVT::i32, Hi0orLo0, Add, OprHi); | |||
| 2423 | } else { | |||
| 2424 | Add = DAG.getNode(ISD::ADD, SL, MVT::i32, OprHi, Bits32); | |||
| 2425 | // cttz(x) = lo_32(x) == 0 ? cttz(hi_32(x)) + 32 : cttz(lo_32(x)) | |||
| 2426 | NewOpr = DAG.getNode(ISD::SELECT, SL, MVT::i32, Hi0orLo0, Add, OprLo); | |||
| 2427 | } | |||
| 2428 | ||||
| 2429 | if (!ZeroUndef) { | |||
| 2430 | // Test if the full 64-bit input is zero. | |||
| 2431 | ||||
| 2432 | // FIXME: DAG combines turn what should be an s_and_b64 into a v_or_b32, | |||
| 2433 | // which we probably don't want. | |||
| 2434 | SDValue LoOrHi = isCtlzOpc(Op.getOpcode()) ? Lo : Hi; | |||
| 2435 | SDValue Lo0OrHi0 = DAG.getSetCC(SL, SetCCVT, LoOrHi, Zero, ISD::SETEQ); | |||
| 2436 | SDValue SrcIsZero = DAG.getNode(ISD::AND, SL, SetCCVT, Lo0OrHi0, Hi0orLo0); | |||
| 2437 | ||||
| 2438 | // TODO: If i64 setcc is half rate, it can result in 1 fewer instruction | |||
| 2439 | // with the same cycles, otherwise it is slower. | |||
| 2440 | // SDValue SrcIsZero = DAG.getSetCC(SL, SetCCVT, Src, | |||
| 2441 | // DAG.getConstant(0, SL, MVT::i64), ISD::SETEQ); | |||
| 2442 | ||||
| 2443 | const SDValue Bits32 = DAG.getConstant(64, SL, MVT::i32); | |||
| 2444 | ||||
| 2445 | // The instruction returns -1 for 0 input, but the defined intrinsic | |||
| 2446 | // behavior is to return the number of bits. | |||
| 2447 | NewOpr = DAG.getNode(ISD::SELECT, SL, MVT::i32, | |||
| 2448 | SrcIsZero, Bits32, NewOpr); | |||
| 2449 | } | |||
| 2450 | ||||
| 2451 | return DAG.getNode(ISD::ZERO_EXTEND, SL, MVT::i64, NewOpr); | |||
| 2452 | } | |||
| 2453 | ||||
| 2454 | SDValue AMDGPUTargetLowering::LowerINT_TO_FP32(SDValue Op, SelectionDAG &DAG, | |||
| 2455 | bool Signed) const { | |||
| 2456 | // Unsigned | |||
| 2457 | // cul2f(ulong u) | |||
| 2458 | //{ | |||
| 2459 | // uint lz = clz(u); | |||
| 2460 | // uint e = (u != 0) ? 127U + 63U - lz : 0; | |||
| 2461 | // u = (u << lz) & 0x7fffffffffffffffUL; | |||
| 2462 | // ulong t = u & 0xffffffffffUL; | |||
| 2463 | // uint v = (e << 23) | (uint)(u >> 40); | |||
| 2464 | // uint r = t > 0x8000000000UL ? 1U : (t == 0x8000000000UL ? v & 1U : 0U); | |||
| 2465 | // return as_float(v + r); | |||
| 2466 | //} | |||
| 2467 | // Signed | |||
| 2468 | // cl2f(long l) | |||
| 2469 | //{ | |||
| 2470 | // long s = l >> 63; | |||
| 2471 | // float r = cul2f((l + s) ^ s); | |||
| 2472 | // return s ? -r : r; | |||
| 2473 | //} | |||
| 2474 | ||||
| 2475 | SDLoc SL(Op); | |||
| 2476 | SDValue Src = Op.getOperand(0); | |||
| 2477 | SDValue L = Src; | |||
| 2478 | ||||
| 2479 | SDValue S; | |||
| 2480 | if (Signed) { | |||
| 2481 | const SDValue SignBit = DAG.getConstant(63, SL, MVT::i64); | |||
| 2482 | S = DAG.getNode(ISD::SRA, SL, MVT::i64, L, SignBit); | |||
| 2483 | ||||
| 2484 | SDValue LPlusS = DAG.getNode(ISD::ADD, SL, MVT::i64, L, S); | |||
| 2485 | L = DAG.getNode(ISD::XOR, SL, MVT::i64, LPlusS, S); | |||
| 2486 | } | |||
| 2487 | ||||
| 2488 | EVT SetCCVT = getSetCCResultType(DAG.getDataLayout(), | |||
| 2489 | *DAG.getContext(), MVT::f32); | |||
| 2490 | ||||
| 2491 | ||||
| 2492 | SDValue ZeroI32 = DAG.getConstant(0, SL, MVT::i32); | |||
| 2493 | SDValue ZeroI64 = DAG.getConstant(0, SL, MVT::i64); | |||
| 2494 | SDValue LZ = DAG.getNode(ISD::CTLZ_ZERO_UNDEF, SL, MVT::i64, L); | |||
| 2495 | LZ = DAG.getNode(ISD::TRUNCATE, SL, MVT::i32, LZ); | |||
| 2496 | ||||
| 2497 | SDValue K = DAG.getConstant(127U + 63U, SL, MVT::i32); | |||
| 2498 | SDValue E = DAG.getSelect(SL, MVT::i32, | |||
| 2499 | DAG.getSetCC(SL, SetCCVT, L, ZeroI64, ISD::SETNE), | |||
| 2500 | DAG.getNode(ISD::SUB, SL, MVT::i32, K, LZ), | |||
| 2501 | ZeroI32); | |||
| 2502 | ||||
| 2503 | SDValue U = DAG.getNode(ISD::AND, SL, MVT::i64, | |||
| 2504 | DAG.getNode(ISD::SHL, SL, MVT::i64, L, LZ), | |||
| 2505 | DAG.getConstant((-1ULL) >> 1, SL, MVT::i64)); | |||
| 2506 | ||||
| 2507 | SDValue T = DAG.getNode(ISD::AND, SL, MVT::i64, U, | |||
| 2508 | DAG.getConstant(0xffffffffffULL, SL, MVT::i64)); | |||
| 2509 | ||||
| 2510 | SDValue UShl = DAG.getNode(ISD::SRL, SL, MVT::i64, | |||
| 2511 | U, DAG.getConstant(40, SL, MVT::i64)); | |||
| 2512 | ||||
| 2513 | SDValue V = DAG.getNode(ISD::OR, SL, MVT::i32, | |||
| 2514 | DAG.getNode(ISD::SHL, SL, MVT::i32, E, DAG.getConstant(23, SL, MVT::i32)), | |||
| 2515 | DAG.getNode(ISD::TRUNCATE, SL, MVT::i32, UShl)); | |||
| 2516 | ||||
| 2517 | SDValue C = DAG.getConstant(0x8000000000ULL, SL, MVT::i64); | |||
| 2518 | SDValue RCmp = DAG.getSetCC(SL, SetCCVT, T, C, ISD::SETUGT); | |||
| 2519 | SDValue TCmp = DAG.getSetCC(SL, SetCCVT, T, C, ISD::SETEQ); | |||
| 2520 | ||||
| 2521 | SDValue One = DAG.getConstant(1, SL, MVT::i32); | |||
| 2522 | ||||
| 2523 | SDValue VTrunc1 = DAG.getNode(ISD::AND, SL, MVT::i32, V, One); | |||
| 2524 | ||||
| 2525 | SDValue R = DAG.getSelect(SL, MVT::i32, | |||
| 2526 | RCmp, | |||
| 2527 | One, | |||
| 2528 | DAG.getSelect(SL, MVT::i32, TCmp, VTrunc1, ZeroI32)); | |||
| 2529 | R = DAG.getNode(ISD::ADD, SL, MVT::i32, V, R); | |||
| 2530 | R = DAG.getNode(ISD::BITCAST, SL, MVT::f32, R); | |||
| 2531 | ||||
| 2532 | if (!Signed) | |||
| 2533 | return R; | |||
| 2534 | ||||
| 2535 | SDValue RNeg = DAG.getNode(ISD::FNEG, SL, MVT::f32, R); | |||
| 2536 | return DAG.getSelect(SL, MVT::f32, DAG.getSExtOrTrunc(S, SL, SetCCVT), RNeg, R); | |||
| 2537 | } | |||
| 2538 | ||||
| 2539 | SDValue AMDGPUTargetLowering::LowerINT_TO_FP64(SDValue Op, SelectionDAG &DAG, | |||
| 2540 | bool Signed) const { | |||
| 2541 | SDLoc SL(Op); | |||
| 2542 | SDValue Src = Op.getOperand(0); | |||
| 2543 | ||||
| 2544 | SDValue BC = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, Src); | |||
| 2545 | ||||
| 2546 | SDValue Lo = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, BC, | |||
| 2547 | DAG.getConstant(0, SL, MVT::i32)); | |||
| 2548 | SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, BC, | |||
| 2549 | DAG.getConstant(1, SL, MVT::i32)); | |||
| 2550 | ||||
| 2551 | SDValue CvtHi = DAG.getNode(Signed ? ISD::SINT_TO_FP : ISD::UINT_TO_FP, | |||
| 2552 | SL, MVT::f64, Hi); | |||
| 2553 | ||||
| 2554 | SDValue CvtLo = DAG.getNode(ISD::UINT_TO_FP, SL, MVT::f64, Lo); | |||
| 2555 | ||||
| 2556 | SDValue LdExp = DAG.getNode(AMDGPUISD::LDEXP, SL, MVT::f64, CvtHi, | |||
| 2557 | DAG.getConstant(32, SL, MVT::i32)); | |||
| 2558 | // TODO: Should this propagate fast-math-flags? | |||
| 2559 | return DAG.getNode(ISD::FADD, SL, MVT::f64, LdExp, CvtLo); | |||
| 2560 | } | |||
| 2561 | ||||
| 2562 | SDValue AMDGPUTargetLowering::LowerUINT_TO_FP(SDValue Op, | |||
| 2563 | SelectionDAG &DAG) const { | |||
| 2564 | // TODO: Factor out code common with LowerSINT_TO_FP. | |||
| 2565 | EVT DestVT = Op.getValueType(); | |||
| 2566 | SDValue Src = Op.getOperand(0); | |||
| 2567 | EVT SrcVT = Src.getValueType(); | |||
| 2568 | ||||
| 2569 | if (SrcVT == MVT::i16) { | |||
| 2570 | if (DestVT == MVT::f16) | |||
| 2571 | return Op; | |||
| 2572 | SDLoc DL(Op); | |||
| 2573 | ||||
| 2574 | // Promote src to i32 | |||
| 2575 | SDValue Ext = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, Src); | |||
| 2576 | return DAG.getNode(ISD::UINT_TO_FP, DL, DestVT, Ext); | |||
| 2577 | } | |||
| 2578 | ||||
| 2579 | assert(SrcVT == MVT::i64 && "operation should be legal")((void)0); | |||
| 2580 | ||||
| 2581 | if (Subtarget->has16BitInsts() && DestVT == MVT::f16) { | |||
| 2582 | SDLoc DL(Op); | |||
| 2583 | ||||
| 2584 | SDValue IntToFp32 = DAG.getNode(Op.getOpcode(), DL, MVT::f32, Src); | |||
| 2585 | SDValue FPRoundFlag = DAG.getIntPtrConstant(0, SDLoc(Op)); | |||
| 2586 | SDValue FPRound = | |||
| 2587 | DAG.getNode(ISD::FP_ROUND, DL, MVT::f16, IntToFp32, FPRoundFlag); | |||
| 2588 | ||||
| 2589 | return FPRound; | |||
| 2590 | } | |||
| 2591 | ||||
| 2592 | if (DestVT == MVT::f32) | |||
| 2593 | return LowerINT_TO_FP32(Op, DAG, false); | |||
| 2594 | ||||
| 2595 | assert(DestVT == MVT::f64)((void)0); | |||
| 2596 | return LowerINT_TO_FP64(Op, DAG, false); | |||
| 2597 | } | |||
| 2598 | ||||
| 2599 | SDValue AMDGPUTargetLowering::LowerSINT_TO_FP(SDValue Op, | |||
| 2600 | SelectionDAG &DAG) const { | |||
| 2601 | EVT DestVT = Op.getValueType(); | |||
| 2602 | ||||
| 2603 | SDValue Src = Op.getOperand(0); | |||
| 2604 | EVT SrcVT = Src.getValueType(); | |||
| 2605 | ||||
| 2606 | if (SrcVT == MVT::i16) { | |||
| 2607 | if (DestVT == MVT::f16) | |||
| 2608 | return Op; | |||
| 2609 | ||||
| 2610 | SDLoc DL(Op); | |||
| 2611 | // Promote src to i32 | |||
| 2612 | SDValue Ext = DAG.getNode(ISD::SIGN_EXTEND, DL, MVT::i32, Src); | |||
| 2613 | return DAG.getNode(ISD::SINT_TO_FP, DL, DestVT, Ext); | |||
| 2614 | } | |||
| 2615 | ||||
| 2616 | assert(SrcVT == MVT::i64 && "operation should be legal")((void)0); | |||
| 2617 | ||||
| 2618 | // TODO: Factor out code common with LowerUINT_TO_FP. | |||
| 2619 | ||||
| 2620 | if (Subtarget->has16BitInsts() && DestVT == MVT::f16) { | |||
| 2621 | SDLoc DL(Op); | |||
| 2622 | SDValue Src = Op.getOperand(0); | |||
| 2623 | ||||
| 2624 | SDValue IntToFp32 = DAG.getNode(Op.getOpcode(), DL, MVT::f32, Src); | |||
| 2625 | SDValue FPRoundFlag = DAG.getIntPtrConstant(0, SDLoc(Op)); | |||
| 2626 | SDValue FPRound = | |||
| 2627 | DAG.getNode(ISD::FP_ROUND, DL, MVT::f16, IntToFp32, FPRoundFlag); | |||
| 2628 | ||||
| 2629 | return FPRound; | |||
| 2630 | } | |||
| 2631 | ||||
| 2632 | if (DestVT == MVT::f32) | |||
| 2633 | return LowerINT_TO_FP32(Op, DAG, true); | |||
| 2634 | ||||
| 2635 | assert(DestVT == MVT::f64)((void)0); | |||
| 2636 | return LowerINT_TO_FP64(Op, DAG, true); | |||
| 2637 | } | |||
| 2638 | ||||
| 2639 | SDValue AMDGPUTargetLowering::LowerFP_TO_INT64(SDValue Op, SelectionDAG &DAG, | |||
| 2640 | bool Signed) const { | |||
| 2641 | SDLoc SL(Op); | |||
| 2642 | ||||
| 2643 | SDValue Src = Op.getOperand(0); | |||
| 2644 | EVT SrcVT = Src.getValueType(); | |||
| 2645 | ||||
| 2646 | assert(SrcVT == MVT::f32 || SrcVT == MVT::f64)((void)0); | |||
| 2647 | ||||
| 2648 | // The basic idea of converting a floating point number into a pair of 32-bit | |||
| 2649 | // integers is illustrated as follows: | |||
| 2650 | // | |||
| 2651 | // tf := trunc(val); | |||
| 2652 | // hif := floor(tf * 2^-32); | |||
| 2653 | // lof := tf - hif * 2^32; // lof is always positive due to floor. | |||
| 2654 | // hi := fptoi(hif); | |||
| 2655 | // lo := fptoi(lof); | |||
| 2656 | // | |||
| 2657 | SDValue Trunc = DAG.getNode(ISD::FTRUNC, SL, SrcVT, Src); | |||
| 2658 | SDValue Sign; | |||
| 2659 | if (Signed && SrcVT == MVT::f32) { | |||
| 2660 | // However, a 32-bit floating point number has only 23 bits mantissa and | |||
| 2661 | // it's not enough to hold all the significant bits of `lof` if val is | |||
| 2662 | // negative. To avoid the loss of precision, We need to take the absolute | |||
| 2663 | // value after truncating and flip the result back based on the original | |||
| 2664 | // signedness. | |||
| 2665 | Sign = DAG.getNode(ISD::SRA, SL, MVT::i32, | |||
| 2666 | DAG.getNode(ISD::BITCAST, SL, MVT::i32, Trunc), | |||
| 2667 | DAG.getConstant(31, SL, MVT::i32)); | |||
| 2668 | Trunc = DAG.getNode(ISD::FABS, SL, SrcVT, Trunc); | |||
| 2669 | } | |||
| 2670 | ||||
| 2671 | SDValue K0, K1; | |||
| 2672 | if (SrcVT == MVT::f64) { | |||
| 2673 | K0 = DAG.getConstantFP(BitsToDouble(UINT64_C(/*2^-32*/ 0x3df0000000000000)0x3df0000000000000ULL), | |||
| 2674 | SL, SrcVT); | |||
| 2675 | K1 = DAG.getConstantFP(BitsToDouble(UINT64_C(/*-2^32*/ 0xc1f0000000000000)0xc1f0000000000000ULL), | |||
| 2676 | SL, SrcVT); | |||
| 2677 | } else { | |||
| 2678 | K0 = DAG.getConstantFP(BitsToFloat(UINT32_C(/*2^-32*/ 0x2f800000)0x2f800000U), SL, | |||
| 2679 | SrcVT); | |||
| 2680 | K1 = DAG.getConstantFP(BitsToFloat(UINT32_C(/*-2^32*/ 0xcf800000)0xcf800000U), SL, | |||
| 2681 | SrcVT); | |||
| 2682 | } | |||
| 2683 | // TODO: Should this propagate fast-math-flags? | |||
| 2684 | SDValue Mul = DAG.getNode(ISD::FMUL, SL, SrcVT, Trunc, K0); | |||
| 2685 | ||||
| 2686 | SDValue FloorMul = DAG.getNode(ISD::FFLOOR, SL, SrcVT, Mul); | |||
| 2687 | ||||
| 2688 | SDValue Fma = DAG.getNode(ISD::FMA, SL, SrcVT, FloorMul, K1, Trunc); | |||
| 2689 | ||||
| 2690 | SDValue Hi = DAG.getNode((Signed && SrcVT == MVT::f64) ? ISD::FP_TO_SINT | |||
| 2691 | : ISD::FP_TO_UINT, | |||
| 2692 | SL, MVT::i32, FloorMul); | |||
| 2693 | SDValue Lo = DAG.getNode(ISD::FP_TO_UINT, SL, MVT::i32, Fma); | |||
| 2694 | ||||
| 2695 | SDValue Result = DAG.getNode(ISD::BITCAST, SL, MVT::i64, | |||
| 2696 | DAG.getBuildVector(MVT::v2i32, SL, {Lo, Hi})); | |||
| 2697 | ||||
| 2698 | if (Signed && SrcVT == MVT::f32) { | |||
| 2699 | assert(Sign)((void)0); | |||
| 2700 | // Flip the result based on the signedness, which is either all 0s or 1s. | |||
| 2701 | Sign = DAG.getNode(ISD::BITCAST, SL, MVT::i64, | |||
| 2702 | DAG.getBuildVector(MVT::v2i32, SL, {Sign, Sign})); | |||
| 2703 | // r := xor(r, sign) - sign; | |||
| 2704 | Result = | |||
| 2705 | DAG.getNode(ISD::SUB, SL, MVT::i64, | |||
| 2706 | DAG.getNode(ISD::XOR, SL, MVT::i64, Result, Sign), Sign); | |||
| 2707 | } | |||
| 2708 | ||||
| 2709 | return Result; | |||
| 2710 | } | |||
| 2711 | ||||
| 2712 | SDValue AMDGPUTargetLowering::LowerFP_TO_FP16(SDValue Op, SelectionDAG &DAG) const { | |||
| 2713 | SDLoc DL(Op); | |||
| 2714 | SDValue N0 = Op.getOperand(0); | |||
| 2715 | ||||
| 2716 | // Convert to target node to get known bits | |||
| 2717 | if (N0.getValueType() == MVT::f32) | |||
| 2718 | return DAG.getNode(AMDGPUISD::FP_TO_FP16, DL, Op.getValueType(), N0); | |||
| 2719 | ||||
| 2720 | if (getTargetMachine().Options.UnsafeFPMath) { | |||
| 2721 | // There is a generic expand for FP_TO_FP16 with unsafe fast math. | |||
| 2722 | return SDValue(); | |||
| 2723 | } | |||
| 2724 | ||||
| 2725 | assert(N0.getSimpleValueType() == MVT::f64)((void)0); | |||
| 2726 | ||||
| 2727 | // f64 -> f16 conversion using round-to-nearest-even rounding mode. | |||
| 2728 | const unsigned ExpMask = 0x7ff; | |||
| 2729 | const unsigned ExpBiasf64 = 1023; | |||
| 2730 | const unsigned ExpBiasf16 = 15; | |||
| 2731 | SDValue Zero = DAG.getConstant(0, DL, MVT::i32); | |||
| 2732 | SDValue One = DAG.getConstant(1, DL, MVT::i32); | |||
| 2733 | SDValue U = DAG.getNode(ISD::BITCAST, DL, MVT::i64, N0); | |||
| 2734 | SDValue UH = DAG.getNode(ISD::SRL, DL, MVT::i64, U, | |||
| 2735 | DAG.getConstant(32, DL, MVT::i64)); | |||
| 2736 | UH = DAG.getZExtOrTrunc(UH, DL, MVT::i32); | |||
| 2737 | U = DAG.getZExtOrTrunc(U, DL, MVT::i32); | |||
| 2738 | SDValue E = DAG.getNode(ISD::SRL, DL, MVT::i32, UH, | |||
| 2739 | DAG.getConstant(20, DL, MVT::i64)); | |||
| 2740 | E = DAG.getNode(ISD::AND, DL, MVT::i32, E, | |||
| 2741 | DAG.getConstant(ExpMask, DL, MVT::i32)); | |||
| 2742 | // Subtract the fp64 exponent bias (1023) to get the real exponent and | |||
| 2743 | // add the f16 bias (15) to get the biased exponent for the f16 format. | |||
| 2744 | E = DAG.getNode(ISD::ADD, DL, MVT::i32, E, | |||
| 2745 | DAG.getConstant(-ExpBiasf64 + ExpBiasf16, DL, MVT::i32)); | |||
| 2746 | ||||
| 2747 | SDValue M = DAG.getNode(ISD::SRL, DL, MVT::i32, UH, | |||
| 2748 | DAG.getConstant(8, DL, MVT::i32)); | |||
| 2749 | M = DAG.getNode(ISD::AND, DL, MVT::i32, M, | |||
| 2750 | DAG.getConstant(0xffe, DL, MVT::i32)); | |||
| 2751 | ||||
| 2752 | SDValue MaskedSig = DAG.getNode(ISD::AND, DL, MVT::i32, UH, | |||
| 2753 | DAG.getConstant(0x1ff, DL, MVT::i32)); | |||
| 2754 | MaskedSig = DAG.getNode(ISD::OR, DL, MVT::i32, MaskedSig, U); | |||
| 2755 | ||||
| 2756 | SDValue Lo40Set = DAG.getSelectCC(DL, MaskedSig, Zero, Zero, One, ISD::SETEQ); | |||
| 2757 | M = DAG.getNode(ISD::OR, DL, MVT::i32, M, Lo40Set); | |||
| 2758 | ||||
| 2759 | // (M != 0 ? 0x0200 : 0) | 0x7c00; | |||
| 2760 | SDValue I = DAG.getNode(ISD::OR, DL, MVT::i32, | |||
| 2761 | DAG.getSelectCC(DL, M, Zero, DAG.getConstant(0x0200, DL, MVT::i32), | |||
| 2762 | Zero, ISD::SETNE), DAG.getConstant(0x7c00, DL, MVT::i32)); | |||
| 2763 | ||||
| 2764 | // N = M | (E << 12); | |||
| 2765 | SDValue N = DAG.getNode(ISD::OR, DL, MVT::i32, M, | |||
| 2766 | DAG.getNode(ISD::SHL, DL, MVT::i32, E, | |||
| 2767 | DAG.getConstant(12, DL, MVT::i32))); | |||
| 2768 | ||||
| 2769 | // B = clamp(1-E, 0, 13); | |||
| 2770 | SDValue OneSubExp = DAG.getNode(ISD::SUB, DL, MVT::i32, | |||
| 2771 | One, E); | |||
| 2772 | SDValue B = DAG.getNode(ISD::SMAX, DL, MVT::i32, OneSubExp, Zero); | |||
| 2773 | B = DAG.getNode(ISD::SMIN, DL, MVT::i32, B, | |||
| 2774 | DAG.getConstant(13, DL, MVT::i32)); | |||
| 2775 | ||||
| 2776 | SDValue SigSetHigh = DAG.getNode(ISD::OR, DL, MVT::i32, M, | |||
| 2777 | DAG.getConstant(0x1000, DL, MVT::i32)); | |||
| 2778 | ||||
| 2779 | SDValue D = DAG.getNode(ISD::SRL, DL, MVT::i32, SigSetHigh, B); | |||
| 2780 | SDValue D0 = DAG.getNode(ISD::SHL, DL, MVT::i32, D, B); | |||
| 2781 | SDValue D1 = DAG.getSelectCC(DL, D0, SigSetHigh, One, Zero, ISD::SETNE); | |||
| 2782 | D = DAG.getNode(ISD::OR, DL, MVT::i32, D, D1); | |||
| 2783 | ||||
| 2784 | SDValue V = DAG.getSelectCC(DL, E, One, D, N, ISD::SETLT); | |||
| 2785 | SDValue VLow3 = DAG.getNode(ISD::AND, DL, MVT::i32, V, | |||
| 2786 | DAG.getConstant(0x7, DL, MVT::i32)); | |||
| 2787 | V = DAG.getNode(ISD::SRL, DL, MVT::i32, V, | |||
| 2788 | DAG.getConstant(2, DL, MVT::i32)); | |||
| 2789 | SDValue V0 = DAG.getSelectCC(DL, VLow3, DAG.getConstant(3, DL, MVT::i32), | |||
| 2790 | One, Zero, ISD::SETEQ); | |||
| 2791 | SDValue V1 = DAG.getSelectCC(DL, VLow3, DAG.getConstant(5, DL, MVT::i32), | |||
| 2792 | One, Zero, ISD::SETGT); | |||
| 2793 | V1 = DAG.getNode(ISD::OR, DL, MVT::i32, V0, V1); | |||
| 2794 | V = DAG.getNode(ISD::ADD, DL, MVT::i32, V, V1); | |||
| 2795 | ||||
| 2796 | V = DAG.getSelectCC(DL, E, DAG.getConstant(30, DL, MVT::i32), | |||
| 2797 | DAG.getConstant(0x7c00, DL, MVT::i32), V, ISD::SETGT); | |||
| 2798 | V = DAG.getSelectCC(DL, E, DAG.getConstant(1039, DL, MVT::i32), | |||
| 2799 | I, V, ISD::SETEQ); | |||
| 2800 | ||||
| 2801 | // Extract the sign bit. | |||
| 2802 | SDValue Sign = DAG.getNode(ISD::SRL, DL, MVT::i32, UH, | |||
| 2803 | DAG.getConstant(16, DL, MVT::i32)); | |||
| 2804 | Sign = DAG.getNode(ISD::AND, DL, MVT::i32, Sign, | |||
| 2805 | DAG.getConstant(0x8000, DL, MVT::i32)); | |||
| 2806 | ||||
| 2807 | V = DAG.getNode(ISD::OR, DL, MVT::i32, Sign, V); | |||
| 2808 | return DAG.getZExtOrTrunc(V, DL, Op.getValueType()); | |||
| 2809 | } | |||
| 2810 | ||||
| 2811 | SDValue AMDGPUTargetLowering::LowerFP_TO_INT(SDValue Op, | |||
| 2812 | SelectionDAG &DAG) const { | |||
| 2813 | SDValue Src = Op.getOperand(0); | |||
| 2814 | unsigned OpOpcode = Op.getOpcode(); | |||
| 2815 | EVT SrcVT = Src.getValueType(); | |||
| 2816 | EVT DestVT = Op.getValueType(); | |||
| 2817 | ||||
| 2818 | // Will be selected natively | |||
| 2819 | if (SrcVT == MVT::f16 && DestVT == MVT::i16) | |||
| 2820 | return Op; | |||
| 2821 | ||||
| 2822 | // Promote i16 to i32 | |||
| 2823 | if (DestVT == MVT::i16 && (SrcVT == MVT::f32 || SrcVT == MVT::f64)) { | |||
| 2824 | SDLoc DL(Op); | |||
| 2825 | ||||
| 2826 | SDValue FpToInt32 = DAG.getNode(OpOpcode, DL, MVT::i32, Src); | |||
| 2827 | return DAG.getNode(ISD::TRUNCATE, DL, MVT::i16, FpToInt32); | |||
| 2828 | } | |||
| 2829 | ||||
| 2830 | if (SrcVT == MVT::f16 || | |||
| 2831 | (SrcVT == MVT::f32 && Src.getOpcode() == ISD::FP16_TO_FP)) { | |||
| 2832 | SDLoc DL(Op); | |||
| 2833 | ||||
| 2834 | SDValue FpToInt32 = DAG.getNode(OpOpcode, DL, MVT::i32, Src); | |||
| 2835 | unsigned Ext = | |||
| 2836 | OpOpcode == ISD::FP_TO_SINT ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND; | |||
| 2837 | return DAG.getNode(Ext, DL, MVT::i64, FpToInt32); | |||
| 2838 | } | |||
| 2839 | ||||
| 2840 | if (DestVT == MVT::i64 && (SrcVT == MVT::f32 || SrcVT == MVT::f64)) | |||
| 2841 | return LowerFP_TO_INT64(Op, DAG, OpOpcode == ISD::FP_TO_SINT); | |||
| 2842 | ||||
| 2843 | return SDValue(); | |||
| 2844 | } | |||
| 2845 | ||||
| 2846 | SDValue AMDGPUTargetLowering::LowerSIGN_EXTEND_INREG(SDValue Op, | |||
| 2847 | SelectionDAG &DAG) const { | |||
| 2848 | EVT ExtraVT = cast<VTSDNode>(Op.getOperand(1))->getVT(); | |||
| 2849 | MVT VT = Op.getSimpleValueType(); | |||
| 2850 | MVT ScalarVT = VT.getScalarType(); | |||
| 2851 | ||||
| 2852 | assert(VT.isVector())((void)0); | |||
| 2853 | ||||
| 2854 | SDValue Src = Op.getOperand(0); | |||
| 2855 | SDLoc DL(Op); | |||
| 2856 | ||||
| 2857 | // TODO: Don't scalarize on Evergreen? | |||
| 2858 | unsigned NElts = VT.getVectorNumElements(); | |||
| 2859 | SmallVector<SDValue, 8> Args; | |||
| 2860 | DAG.ExtractVectorElements(Src, Args, 0, NElts); | |||
| 2861 | ||||
| 2862 | SDValue VTOp = DAG.getValueType(ExtraVT.getScalarType()); | |||
| 2863 | for (unsigned I = 0; I < NElts; ++I) | |||
| 2864 | Args[I] = DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, ScalarVT, Args[I], VTOp); | |||
| 2865 | ||||
| 2866 | return DAG.getBuildVector(VT, DL, Args); | |||
| 2867 | } | |||
| 2868 | ||||
| 2869 | //===----------------------------------------------------------------------===// | |||
| 2870 | // Custom DAG optimizations | |||
| 2871 | //===----------------------------------------------------------------------===// | |||
| 2872 | ||||
| 2873 | static bool isU24(SDValue Op, SelectionDAG &DAG) { | |||
| 2874 | return AMDGPUTargetLowering::numBitsUnsigned(Op, DAG) <= 24; | |||
| 2875 | } | |||
| 2876 | ||||
| 2877 | static bool isI24(SDValue Op, SelectionDAG &DAG) { | |||
| 2878 | EVT VT = Op.getValueType(); | |||
| 2879 | return VT.getSizeInBits() >= 24 && // Types less than 24-bit should be treated | |||
| 2880 | // as unsigned 24-bit values. | |||
| 2881 | AMDGPUTargetLowering::numBitsSigned(Op, DAG) < 24; | |||
| 2882 | } | |||
| 2883 | ||||
| 2884 | static SDValue simplifyMul24(SDNode *Node24, | |||
| 2885 | TargetLowering::DAGCombinerInfo &DCI) { | |||
| 2886 | SelectionDAG &DAG = DCI.DAG; | |||
| 2887 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
| 2888 | bool IsIntrin = Node24->getOpcode() == ISD::INTRINSIC_WO_CHAIN; | |||
| 2889 | ||||
| 2890 | SDValue LHS = IsIntrin ? Node24->getOperand(1) : Node24->getOperand(0); | |||
| 2891 | SDValue RHS = IsIntrin ? Node24->getOperand(2) : Node24->getOperand(1); | |||
| 2892 | unsigned NewOpcode = Node24->getOpcode(); | |||
| 2893 | if (IsIntrin) { | |||
| 2894 | unsigned IID = cast<ConstantSDNode>(Node24->getOperand(0))->getZExtValue(); | |||
| 2895 | NewOpcode = IID == Intrinsic::amdgcn_mul_i24 ? | |||
| 2896 | AMDGPUISD::MUL_I24 : AMDGPUISD::MUL_U24; | |||
| 2897 | } | |||
| 2898 | ||||
| 2899 | APInt Demanded = APInt::getLowBitsSet(LHS.getValueSizeInBits(), 24); | |||
| 2900 | ||||
| 2901 | // First try to simplify using SimplifyMultipleUseDemandedBits which allows | |||
| 2902 | // the operands to have other uses, but will only perform simplifications that | |||
| 2903 | // involve bypassing some nodes for this user. | |||
| 2904 | SDValue DemandedLHS = TLI.SimplifyMultipleUseDemandedBits(LHS, Demanded, DAG); | |||
| 2905 | SDValue DemandedRHS = TLI.SimplifyMultipleUseDemandedBits(RHS, Demanded, DAG); | |||
| 2906 | if (DemandedLHS || DemandedRHS) | |||
| 2907 | return DAG.getNode(NewOpcode, SDLoc(Node24), Node24->getVTList(), | |||
| 2908 | DemandedLHS ? DemandedLHS : LHS, | |||
| 2909 | DemandedRHS ? DemandedRHS : RHS); | |||
| 2910 | ||||
| 2911 | // Now try SimplifyDemandedBits which can simplify the nodes used by our | |||
| 2912 | // operands if this node is the only user. | |||
| 2913 | if (TLI.SimplifyDemandedBits(LHS, Demanded, DCI)) | |||
| 2914 | return SDValue(Node24, 0); | |||
| 2915 | if (TLI.SimplifyDemandedBits(RHS, Demanded, DCI)) | |||
| 2916 | return SDValue(Node24, 0); | |||
| 2917 | ||||
| 2918 | return SDValue(); | |||
| 2919 | } | |||
| 2920 | ||||
| 2921 | template <typename IntTy> | |||
| 2922 | static SDValue constantFoldBFE(SelectionDAG &DAG, IntTy Src0, uint32_t Offset, | |||
| 2923 | uint32_t Width, const SDLoc &DL) { | |||
| 2924 | if (Width + Offset < 32) { | |||
| 2925 | uint32_t Shl = static_cast<uint32_t>(Src0) << (32 - Offset - Width); | |||
| 2926 | IntTy Result = static_cast<IntTy>(Shl) >> (32 - Width); | |||
| 2927 | return DAG.getConstant(Result, DL, MVT::i32); | |||
| 2928 | } | |||
| 2929 | ||||
| 2930 | return DAG.getConstant(Src0 >> Offset, DL, MVT::i32); | |||
| 2931 | } | |||
| 2932 | ||||
| 2933 | static bool hasVolatileUser(SDNode *Val) { | |||
| 2934 | for (SDNode *U : Val->uses()) { | |||
| 2935 | if (MemSDNode *M = dyn_cast<MemSDNode>(U)) { | |||
| 2936 | if (M->isVolatile()) | |||
| 2937 | return true; | |||
| 2938 | } | |||
| 2939 | } | |||
| 2940 | ||||
| 2941 | return false; | |||
| 2942 | } | |||
| 2943 | ||||
| 2944 | bool AMDGPUTargetLowering::shouldCombineMemoryType(EVT VT) const { | |||
| 2945 | // i32 vectors are the canonical memory type. | |||
| 2946 | if (VT.getScalarType() == MVT::i32 || isTypeLegal(VT)) | |||
| 2947 | return false; | |||
| 2948 | ||||
| 2949 | if (!VT.isByteSized()) | |||
| 2950 | return false; | |||
| 2951 | ||||
| 2952 | unsigned Size = VT.getStoreSize(); | |||
| 2953 | ||||
| 2954 | if ((Size == 1 || Size == 2 || Size == 4) && !VT.isVector()) | |||
| 2955 | return false; | |||
| 2956 | ||||
| 2957 | if (Size == 3 || (Size > 4 && (Size % 4 != 0))) | |||
| 2958 | return false; | |||
| 2959 | ||||
| 2960 | return true; | |||
| 2961 | } | |||
| 2962 | ||||
| 2963 | // Replace load of an illegal type with a store of a bitcast to a friendlier | |||
| 2964 | // type. | |||
| 2965 | SDValue AMDGPUTargetLowering::performLoadCombine(SDNode *N, | |||
| 2966 | DAGCombinerInfo &DCI) const { | |||
| 2967 | if (!DCI.isBeforeLegalize()) | |||
| 2968 | return SDValue(); | |||
| 2969 | ||||
| 2970 | LoadSDNode *LN = cast<LoadSDNode>(N); | |||
| 2971 | if (!LN->isSimple() || !ISD::isNormalLoad(LN) || hasVolatileUser(LN)) | |||
| 2972 | return SDValue(); | |||
| 2973 | ||||
| 2974 | SDLoc SL(N); | |||
| 2975 | SelectionDAG &DAG = DCI.DAG; | |||
| 2976 | EVT VT = LN->getMemoryVT(); | |||
| 2977 | ||||
| 2978 | unsigned Size = VT.getStoreSize(); | |||
| 2979 | Align Alignment = LN->getAlign(); | |||
| 2980 | if (Alignment < Size && isTypeLegal(VT)) { | |||
| 2981 | bool IsFast; | |||
| 2982 | unsigned AS = LN->getAddressSpace(); | |||
| 2983 | ||||
| 2984 | // Expand unaligned loads earlier than legalization. Due to visitation order | |||
| 2985 | // problems during legalization, the emitted instructions to pack and unpack | |||
| 2986 | // the bytes again are not eliminated in the case of an unaligned copy. | |||
| 2987 | if (!allowsMisalignedMemoryAccesses( | |||
| 2988 | VT, AS, Alignment, LN->getMemOperand()->getFlags(), &IsFast)) { | |||
| 2989 | SDValue Ops[2]; | |||
| 2990 | ||||
| 2991 | if (VT.isVector()) | |||
| 2992 | std::tie(Ops[0], Ops[1]) = scalarizeVectorLoad(LN, DAG); | |||
| 2993 | else | |||
| 2994 | std::tie(Ops[0], Ops[1]) = expandUnalignedLoad(LN, DAG); | |||
| 2995 | ||||
| 2996 | return DAG.getMergeValues(Ops, SDLoc(N)); | |||
| 2997 | } | |||
| 2998 | ||||
| 2999 | if (!IsFast) | |||
| 3000 | return SDValue(); | |||
| 3001 | } | |||
| 3002 | ||||
| 3003 | if (!shouldCombineMemoryType(VT)) | |||
| 3004 | return SDValue(); | |||
| 3005 | ||||
| 3006 | EVT NewVT = getEquivalentMemType(*DAG.getContext(), VT); | |||
| 3007 | ||||
| 3008 | SDValue NewLoad | |||
| 3009 | = DAG.getLoad(NewVT, SL, LN->getChain(), | |||
| 3010 | LN->getBasePtr(), LN->getMemOperand()); | |||
| 3011 | ||||
| 3012 | SDValue BC = DAG.getNode(ISD::BITCAST, SL, VT, NewLoad); | |||
| 3013 | DCI.CombineTo(N, BC, NewLoad.getValue(1)); | |||
| 3014 | return SDValue(N, 0); | |||
| 3015 | } | |||
| 3016 | ||||
| 3017 | // Replace store of an illegal type with a store of a bitcast to a friendlier | |||
| 3018 | // type. | |||
| 3019 | SDValue AMDGPUTargetLowering::performStoreCombine(SDNode *N, | |||
| 3020 | DAGCombinerInfo &DCI) const { | |||
| 3021 | if (!DCI.isBeforeLegalize()) | |||
| 3022 | return SDValue(); | |||
| 3023 | ||||
| 3024 | StoreSDNode *SN = cast<StoreSDNode>(N); | |||
| 3025 | if (!SN->isSimple() || !ISD::isNormalStore(SN)) | |||
| 3026 | return SDValue(); | |||
| 3027 | ||||
| 3028 | EVT VT = SN->getMemoryVT(); | |||
| 3029 | unsigned Size = VT.getStoreSize(); | |||
| 3030 | ||||
| 3031 | SDLoc SL(N); | |||
| 3032 | SelectionDAG &DAG = DCI.DAG; | |||
| 3033 | Align Alignment = SN->getAlign(); | |||
| 3034 | if (Alignment < Size && isTypeLegal(VT)) { | |||
| 3035 | bool IsFast; | |||
| 3036 | unsigned AS = SN->getAddressSpace(); | |||
| 3037 | ||||
| 3038 | // Expand unaligned stores earlier than legalization. Due to visitation | |||
| 3039 | // order problems during legalization, the emitted instructions to pack and | |||
| 3040 | // unpack the bytes again are not eliminated in the case of an unaligned | |||
| 3041 | // copy. | |||
| 3042 | if (!allowsMisalignedMemoryAccesses( | |||
| 3043 | VT, AS, Alignment, SN->getMemOperand()->getFlags(), &IsFast)) { | |||
| 3044 | if (VT.isVector()) | |||
| 3045 | return scalarizeVectorStore(SN, DAG); | |||
| 3046 | ||||
| 3047 | return expandUnalignedStore(SN, DAG); | |||
| 3048 | } | |||
| 3049 | ||||
| 3050 | if (!IsFast) | |||
| 3051 | return SDValue(); | |||
| 3052 | } | |||
| 3053 | ||||
| 3054 | if (!shouldCombineMemoryType(VT)) | |||
| 3055 | return SDValue(); | |||
| 3056 | ||||
| 3057 | EVT NewVT = getEquivalentMemType(*DAG.getContext(), VT); | |||
| 3058 | SDValue Val = SN->getValue(); | |||
| 3059 | ||||
| 3060 | //DCI.AddToWorklist(Val.getNode()); | |||
| 3061 | ||||
| 3062 | bool OtherUses = !Val.hasOneUse(); | |||
| 3063 | SDValue CastVal = DAG.getNode(ISD::BITCAST, SL, NewVT, Val); | |||
| 3064 | if (OtherUses) { | |||
| 3065 | SDValue CastBack = DAG.getNode(ISD::BITCAST, SL, VT, CastVal); | |||
| 3066 | DAG.ReplaceAllUsesOfValueWith(Val, CastBack); | |||
| 3067 | } | |||
| 3068 | ||||
| 3069 | return DAG.getStore(SN->getChain(), SL, CastVal, | |||
| 3070 | SN->getBasePtr(), SN->getMemOperand()); | |||
| 3071 | } | |||
| 3072 | ||||
| 3073 | // FIXME: This should go in generic DAG combiner with an isTruncateFree check, | |||
| 3074 | // but isTruncateFree is inaccurate for i16 now because of SALU vs. VALU | |||
| 3075 | // issues. | |||
| 3076 | SDValue AMDGPUTargetLowering::performAssertSZExtCombine(SDNode *N, | |||
| 3077 | DAGCombinerInfo &DCI) const { | |||
| 3078 | SelectionDAG &DAG = DCI.DAG; | |||
| 3079 | SDValue N0 = N->getOperand(0); | |||
| 3080 | ||||
| 3081 | // (vt2 (assertzext (truncate vt0:x), vt1)) -> | |||
| 3082 | // (vt2 (truncate (assertzext vt0:x, vt1))) | |||
| 3083 | if (N0.getOpcode() == ISD::TRUNCATE) { | |||
| 3084 | SDValue N1 = N->getOperand(1); | |||
| 3085 | EVT ExtVT = cast<VTSDNode>(N1)->getVT(); | |||
| 3086 | SDLoc SL(N); | |||
| 3087 | ||||
| 3088 | SDValue Src = N0.getOperand(0); | |||
| 3089 | EVT SrcVT = Src.getValueType(); | |||
| 3090 | if (SrcVT.bitsGE(ExtVT)) { | |||
| 3091 | SDValue NewInReg = DAG.getNode(N->getOpcode(), SL, SrcVT, Src, N1); | |||
| 3092 | return DAG.getNode(ISD::TRUNCATE, SL, N->getValueType(0), NewInReg); | |||
| 3093 | } | |||
| 3094 | } | |||
| 3095 | ||||
| 3096 | return SDValue(); | |||
| 3097 | } | |||
| 3098 | ||||
| 3099 | SDValue AMDGPUTargetLowering::performIntrinsicWOChainCombine( | |||
| 3100 | SDNode *N, DAGCombinerInfo &DCI) const { | |||
| 3101 | unsigned IID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue(); | |||
| 3102 | switch (IID) { | |||
| 3103 | case Intrinsic::amdgcn_mul_i24: | |||
| 3104 | case Intrinsic::amdgcn_mul_u24: | |||
| 3105 | return simplifyMul24(N, DCI); | |||
| 3106 | case Intrinsic::amdgcn_fract: | |||
| 3107 | case Intrinsic::amdgcn_rsq: | |||
| 3108 | case Intrinsic::amdgcn_rcp_legacy: | |||
| 3109 | case Intrinsic::amdgcn_rsq_legacy: | |||
| 3110 | case Intrinsic::amdgcn_rsq_clamp: | |||
| 3111 | case Intrinsic::amdgcn_ldexp: { | |||
| 3112 | // FIXME: This is probably wrong. If src is an sNaN, it won't be quieted | |||
| 3113 | SDValue Src = N->getOperand(1); | |||
| 3114 | return Src.isUndef() ? Src : SDValue(); | |||
| 3115 | } | |||
| 3116 | default: | |||
| 3117 | return SDValue(); | |||
| 3118 | } | |||
| 3119 | } | |||
| 3120 | ||||
| 3121 | /// Split the 64-bit value \p LHS into two 32-bit components, and perform the | |||
| 3122 | /// binary operation \p Opc to it with the corresponding constant operands. | |||
| 3123 | SDValue AMDGPUTargetLowering::splitBinaryBitConstantOpImpl( | |||
| 3124 | DAGCombinerInfo &DCI, const SDLoc &SL, | |||
| 3125 | unsigned Opc, SDValue LHS, | |||
| 3126 | uint32_t ValLo, uint32_t ValHi) const { | |||
| 3127 | SelectionDAG &DAG = DCI.DAG; | |||
| 3128 | SDValue Lo, Hi; | |||
| 3129 | std::tie(Lo, Hi) = split64BitValue(LHS, DAG); | |||
| 3130 | ||||
| 3131 | SDValue LoRHS = DAG.getConstant(ValLo, SL, MVT::i32); | |||
| 3132 | SDValue HiRHS = DAG.getConstant(ValHi, SL, MVT::i32); | |||
| 3133 | ||||
| 3134 | SDValue LoAnd = DAG.getNode(Opc, SL, MVT::i32, Lo, LoRHS); | |||
| 3135 | SDValue HiAnd = DAG.getNode(Opc, SL, MVT::i32, Hi, HiRHS); | |||
| 3136 | ||||
| 3137 | // Re-visit the ands. It's possible we eliminated one of them and it could | |||
| 3138 | // simplify the vector. | |||
| 3139 | DCI.AddToWorklist(Lo.getNode()); | |||
| 3140 | DCI.AddToWorklist(Hi.getNode()); | |||
| 3141 | ||||
| 3142 | SDValue Vec = DAG.getBuildVector(MVT::v2i32, SL, {LoAnd, HiAnd}); | |||
| 3143 | return DAG.getNode(ISD::BITCAST, SL, MVT::i64, Vec); | |||
| 3144 | } | |||
| 3145 | ||||
| 3146 | SDValue AMDGPUTargetLowering::performShlCombine(SDNode *N, | |||
| 3147 | DAGCombinerInfo &DCI) const { | |||
| 3148 | EVT VT = N->getValueType(0); | |||
| 3149 | ||||
| 3150 | ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N->getOperand(1)); | |||
| 3151 | if (!RHS) | |||
| 3152 | return SDValue(); | |||
| 3153 | ||||
| 3154 | SDValue LHS = N->getOperand(0); | |||
| 3155 | unsigned RHSVal = RHS->getZExtValue(); | |||
| 3156 | if (!RHSVal) | |||
| 3157 | return LHS; | |||
| 3158 | ||||
| 3159 | SDLoc SL(N); | |||
| 3160 | SelectionDAG &DAG = DCI.DAG; | |||
| 3161 | ||||
| 3162 | switch (LHS->getOpcode()) { | |||
| 3163 | default: | |||
| 3164 | break; | |||
| 3165 | case ISD::ZERO_EXTEND: | |||
| 3166 | case ISD::SIGN_EXTEND: | |||
| 3167 | case ISD::ANY_EXTEND: { | |||
| 3168 | SDValue X = LHS->getOperand(0); | |||
| 3169 | ||||
| 3170 | if (VT == MVT::i32 && RHSVal == 16 && X.getValueType() == MVT::i16 && | |||
| 3171 | isOperationLegal(ISD::BUILD_VECTOR, MVT::v2i16)) { | |||
| 3172 | // Prefer build_vector as the canonical form if packed types are legal. | |||
| 3173 | // (shl ([asz]ext i16:x), 16 -> build_vector 0, x | |||
| 3174 | SDValue Vec = DAG.getBuildVector(MVT::v2i16, SL, | |||
| 3175 | { DAG.getConstant(0, SL, MVT::i16), LHS->getOperand(0) }); | |||
| 3176 | return DAG.getNode(ISD::BITCAST, SL, MVT::i32, Vec); | |||
| 3177 | } | |||
| 3178 | ||||
| 3179 | // shl (ext x) => zext (shl x), if shift does not overflow int | |||
| 3180 | if (VT != MVT::i64) | |||
| 3181 | break; | |||
| 3182 | KnownBits Known = DAG.computeKnownBits(X); | |||
| 3183 | unsigned LZ = Known.countMinLeadingZeros(); | |||
| 3184 | if (LZ < RHSVal) | |||
| 3185 | break; | |||
| 3186 | EVT XVT = X.getValueType(); | |||
| 3187 | SDValue Shl = DAG.getNode(ISD::SHL, SL, XVT, X, SDValue(RHS, 0)); | |||
| 3188 | return DAG.getZExtOrTrunc(Shl, SL, VT); | |||
| 3189 | } | |||
| 3190 | } | |||
| 3191 | ||||
| 3192 | if (VT != MVT::i64) | |||
| 3193 | return SDValue(); | |||
| 3194 | ||||
| 3195 | // i64 (shl x, C) -> (build_pair 0, (shl x, C -32)) | |||
| 3196 | ||||
| 3197 | // On some subtargets, 64-bit shift is a quarter rate instruction. In the | |||
| 3198 | // common case, splitting this into a move and a 32-bit shift is faster and | |||
| 3199 | // the same code size. | |||
| 3200 | if (RHSVal < 32) | |||
| 3201 | return SDValue(); | |||
| 3202 | ||||
| 3203 | SDValue ShiftAmt = DAG.getConstant(RHSVal - 32, SL, MVT::i32); | |||
| 3204 | ||||
| 3205 | SDValue Lo = DAG.getNode(ISD::TRUNCATE, SL, MVT::i32, LHS); | |||
| 3206 | SDValue NewShift = DAG.getNode(ISD::SHL, SL, MVT::i32, Lo, ShiftAmt); | |||
| 3207 | ||||
| 3208 | const SDValue Zero = DAG.getConstant(0, SL, MVT::i32); | |||
| 3209 | ||||
| 3210 | SDValue Vec = DAG.getBuildVector(MVT::v2i32, SL, {Zero, NewShift}); | |||
| 3211 | return DAG.getNode(ISD::BITCAST, SL, MVT::i64, Vec); | |||
| 3212 | } | |||
| 3213 | ||||
| 3214 | SDValue AMDGPUTargetLowering::performSraCombine(SDNode *N, | |||
| 3215 | DAGCombinerInfo &DCI) const { | |||
| 3216 | if (N->getValueType(0) != MVT::i64) | |||
| 3217 | return SDValue(); | |||
| 3218 | ||||
| 3219 | const ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N->getOperand(1)); | |||
| 3220 | if (!RHS) | |||
| 3221 | return SDValue(); | |||
| 3222 | ||||
| 3223 | SelectionDAG &DAG = DCI.DAG; | |||
| 3224 | SDLoc SL(N); | |||
| 3225 | unsigned RHSVal = RHS->getZExtValue(); | |||
| 3226 | ||||
| 3227 | // (sra i64:x, 32) -> build_pair x, (sra hi_32(x), 31) | |||
| 3228 | if (RHSVal == 32) { | |||
| 3229 | SDValue Hi = getHiHalf64(N->getOperand(0), DAG); | |||
| 3230 | SDValue NewShift = DAG.getNode(ISD::SRA, SL, MVT::i32, Hi, | |||
| 3231 | DAG.getConstant(31, SL, MVT::i32)); | |||
| 3232 | ||||
| 3233 | SDValue BuildVec = DAG.getBuildVector(MVT::v2i32, SL, {Hi, NewShift}); | |||
| 3234 | return DAG.getNode(ISD::BITCAST, SL, MVT::i64, BuildVec); | |||
| 3235 | } | |||
| 3236 | ||||
| 3237 | // (sra i64:x, 63) -> build_pair (sra hi_32(x), 31), (sra hi_32(x), 31) | |||
| 3238 | if (RHSVal == 63) { | |||
| 3239 | SDValue Hi = getHiHalf64(N->getOperand(0), DAG); | |||
| 3240 | SDValue NewShift = DAG.getNode(ISD::SRA, SL, MVT::i32, Hi, | |||
| 3241 | DAG.getConstant(31, SL, MVT::i32)); | |||
| 3242 | SDValue BuildVec = DAG.getBuildVector(MVT::v2i32, SL, {NewShift, NewShift}); | |||
| 3243 | return DAG.getNode(ISD::BITCAST, SL, MVT::i64, BuildVec); | |||
| 3244 | } | |||
| 3245 | ||||
| 3246 | return SDValue(); | |||
| 3247 | } | |||
| 3248 | ||||
| 3249 | SDValue AMDGPUTargetLowering::performSrlCombine(SDNode *N, | |||
| 3250 | DAGCombinerInfo &DCI) const { | |||
| 3251 | auto *RHS = dyn_cast<ConstantSDNode>(N->getOperand(1)); | |||
| 3252 | if (!RHS) | |||
| 3253 | return SDValue(); | |||
| 3254 | ||||
| 3255 | EVT VT = N->getValueType(0); | |||
| 3256 | SDValue LHS = N->getOperand(0); | |||
| 3257 | unsigned ShiftAmt = RHS->getZExtValue(); | |||
| 3258 | SelectionDAG &DAG = DCI.DAG; | |||
| 3259 | SDLoc SL(N); | |||
| 3260 | ||||
| 3261 | // fold (srl (and x, c1 << c2), c2) -> (and (srl(x, c2), c1) | |||
| 3262 | // this improves the ability to match BFE patterns in isel. | |||
| 3263 | if (LHS.getOpcode() == ISD::AND) { | |||
| 3264 | if (auto *Mask = dyn_cast<ConstantSDNode>(LHS.getOperand(1))) { | |||
| 3265 | if (Mask->getAPIntValue().isShiftedMask() && | |||
| 3266 | Mask->getAPIntValue().countTrailingZeros() == ShiftAmt) { | |||
| 3267 | return DAG.getNode( | |||
| 3268 | ISD::AND, SL, VT, | |||
| 3269 | DAG.getNode(ISD::SRL, SL, VT, LHS.getOperand(0), N->getOperand(1)), | |||
| 3270 | DAG.getNode(ISD::SRL, SL, VT, LHS.getOperand(1), N->getOperand(1))); | |||
| 3271 | } | |||
| 3272 | } | |||
| 3273 | } | |||
| 3274 | ||||
| 3275 | if (VT != MVT::i64) | |||
| 3276 | return SDValue(); | |||
| 3277 | ||||
| 3278 | if (ShiftAmt < 32) | |||
| 3279 | return SDValue(); | |||
| 3280 | ||||
| 3281 | // srl i64:x, C for C >= 32 | |||
| 3282 | // => | |||
| 3283 | // build_pair (srl hi_32(x), C - 32), 0 | |||
| 3284 | SDValue One = DAG.getConstant(1, SL, MVT::i32); | |||
| 3285 | SDValue Zero = DAG.getConstant(0, SL, MVT::i32); | |||
| 3286 | ||||
| 3287 | SDValue VecOp = DAG.getNode(ISD::BITCAST, SL, MVT::v2i32, LHS); | |||
| 3288 | SDValue Hi = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SL, MVT::i32, VecOp, One); | |||
| 3289 | ||||
| 3290 | SDValue NewConst = DAG.getConstant(ShiftAmt - 32, SL, MVT::i32); | |||
| 3291 | SDValue NewShift = DAG.getNode(ISD::SRL, SL, MVT::i32, Hi, NewConst); | |||
| 3292 | ||||
| 3293 | SDValue BuildPair = DAG.getBuildVector(MVT::v2i32, SL, {NewShift, Zero}); | |||
| 3294 | ||||
| 3295 | return DAG.getNode(ISD::BITCAST, SL, MVT::i64, BuildPair); | |||
| 3296 | } | |||
| 3297 | ||||
| 3298 | SDValue AMDGPUTargetLowering::performTruncateCombine( | |||
| 3299 | SDNode *N, DAGCombinerInfo &DCI) const { | |||
| 3300 | SDLoc SL(N); | |||
| 3301 | SelectionDAG &DAG = DCI.DAG; | |||
| 3302 | EVT VT = N->getValueType(0); | |||
| 3303 | SDValue Src = N->getOperand(0); | |||
| 3304 | ||||
| 3305 | // vt1 (truncate (bitcast (build_vector vt0:x, ...))) -> vt1 (bitcast vt0:x) | |||
| 3306 | if (Src.getOpcode() == ISD::BITCAST && !VT.isVector()) { | |||
| 3307 | SDValue Vec = Src.getOperand(0); | |||
| 3308 | if (Vec.getOpcode() == ISD::BUILD_VECTOR) { | |||
| 3309 | SDValue Elt0 = Vec.getOperand(0); | |||
| 3310 | EVT EltVT = Elt0.getValueType(); | |||
| 3311 | if (VT.getFixedSizeInBits() <= EltVT.getFixedSizeInBits()) { | |||
| 3312 | if (EltVT.isFloatingPoint()) { | |||
| 3313 | Elt0 = DAG.getNode(ISD::BITCAST, SL, | |||
| 3314 | EltVT.changeTypeToInteger(), Elt0); | |||
| 3315 | } | |||
| 3316 | ||||
| 3317 | return DAG.getNode(ISD::TRUNCATE, SL, VT, Elt0); | |||
| 3318 | } | |||
| 3319 | } | |||
| 3320 | } | |||
| 3321 | ||||
| 3322 | // Equivalent of above for accessing the high element of a vector as an | |||
| 3323 | // integer operation. | |||
| 3324 | // trunc (srl (bitcast (build_vector x, y))), 16 -> trunc (bitcast y) | |||
| 3325 | if (Src.getOpcode() == ISD::SRL && !VT.isVector()) { | |||
| 3326 | if (auto K = isConstOrConstSplat(Src.getOperand(1))) { | |||
| 3327 | if (2 * K->getZExtValue() == Src.getValueType().getScalarSizeInBits()) { | |||
| 3328 | SDValue BV = stripBitcast(Src.getOperand(0)); | |||
| 3329 | if (BV.getOpcode() == ISD::BUILD_VECTOR && | |||
| 3330 | BV.getValueType().getVectorNumElements() == 2) { | |||
| 3331 | SDValue SrcElt = BV.getOperand(1); | |||
| 3332 | EVT SrcEltVT = SrcElt.getValueType(); | |||
| 3333 | if (SrcEltVT.isFloatingPoint()) { | |||
| 3334 | SrcElt = DAG.getNode(ISD::BITCAST, SL, | |||
| 3335 | SrcEltVT.changeTypeToInteger(), SrcElt); | |||
| 3336 | } | |||
| 3337 | ||||
| 3338 | return DAG.getNode(ISD::TRUNCATE, SL, VT, SrcElt); | |||
| 3339 | } | |||
| 3340 | } | |||
| 3341 | } | |||
| 3342 | } | |||
| 3343 | ||||
| 3344 | // Partially shrink 64-bit shifts to 32-bit if reduced to 16-bit. | |||
| 3345 | // | |||
| 3346 | // i16 (trunc (srl i64:x, K)), K <= 16 -> | |||
| 3347 | // i16 (trunc (srl (i32 (trunc x), K))) | |||
| 3348 | if (VT.getScalarSizeInBits() < 32) { | |||
| 3349 | EVT SrcVT = Src.getValueType(); | |||
| 3350 | if (SrcVT.getScalarSizeInBits() > 32 && | |||
| 3351 | (Src.getOpcode() == ISD::SRL || | |||
| 3352 | Src.getOpcode() == ISD::SRA || | |||
| 3353 | Src.getOpcode() == ISD::SHL)) { | |||
| 3354 | SDValue Amt = Src.getOperand(1); | |||
| 3355 | KnownBits Known = DAG.computeKnownBits(Amt); | |||
| 3356 | unsigned Size = VT.getScalarSizeInBits(); | |||
| 3357 | if ((Known.isConstant() && Known.getConstant().ule(Size)) || | |||
| 3358 | (Known.getBitWidth() - Known.countMinLeadingZeros() <= Log2_32(Size))) { | |||
| 3359 | EVT MidVT = VT.isVector() ? | |||
| 3360 | EVT::getVectorVT(*DAG.getContext(), MVT::i32, | |||
| 3361 | VT.getVectorNumElements()) : MVT::i32; | |||
| 3362 | ||||
| 3363 | EVT NewShiftVT = getShiftAmountTy(MidVT, DAG.getDataLayout()); | |||
| 3364 | SDValue Trunc = DAG.getNode(ISD::TRUNCATE, SL, MidVT, | |||
| 3365 | Src.getOperand(0)); | |||
| 3366 | DCI.AddToWorklist(Trunc.getNode()); | |||
| 3367 | ||||
| 3368 | if (Amt.getValueType() != NewShiftVT) { | |||
| 3369 | Amt = DAG.getZExtOrTrunc(Amt, SL, NewShiftVT); | |||
| 3370 | DCI.AddToWorklist(Amt.getNode()); | |||
| 3371 | } | |||
| 3372 | ||||
| 3373 | SDValue ShrunkShift = DAG.getNode(Src.getOpcode(), SL, MidVT, | |||
| 3374 | Trunc, Amt); | |||
| 3375 | return DAG.getNode(ISD::TRUNCATE, SL, VT, ShrunkShift); | |||
| 3376 | } | |||
| 3377 | } | |||
| 3378 | } | |||
| 3379 | ||||
| 3380 | return SDValue(); | |||
| 3381 | } | |||
| 3382 | ||||
| 3383 | // We need to specifically handle i64 mul here to avoid unnecessary conversion | |||
| 3384 | // instructions. If we only match on the legalized i64 mul expansion, | |||
| 3385 | // SimplifyDemandedBits will be unable to remove them because there will be | |||
| 3386 | // multiple uses due to the separate mul + mulh[su]. | |||
| 3387 | static SDValue getMul24(SelectionDAG &DAG, const SDLoc &SL, | |||
| 3388 | SDValue N0, SDValue N1, unsigned Size, bool Signed) { | |||
| 3389 | if (Size <= 32) { | |||
| 3390 | unsigned MulOpc = Signed ? AMDGPUISD::MUL_I24 : AMDGPUISD::MUL_U24; | |||
| 3391 | return DAG.getNode(MulOpc, SL, MVT::i32, N0, N1); | |||
| 3392 | } | |||
| 3393 | ||||
| 3394 | unsigned MulLoOpc = Signed ? AMDGPUISD::MUL_I24 : AMDGPUISD::MUL_U24; | |||
| 3395 | unsigned MulHiOpc = Signed ? AMDGPUISD::MULHI_I24 : AMDGPUISD::MULHI_U24; | |||
| 3396 | ||||
| 3397 | SDValue MulLo = DAG.getNode(MulLoOpc, SL, MVT::i32, N0, N1); | |||
| 3398 | SDValue MulHi = DAG.getNode(MulHiOpc, SL, MVT::i32, N0, N1); | |||
| 3399 | ||||
| 3400 | return DAG.getNode(ISD::BUILD_PAIR, SL, MVT::i64, MulLo, MulHi); | |||
| 3401 | } | |||
| 3402 | ||||
| 3403 | SDValue AMDGPUTargetLowering::performMulCombine(SDNode *N, | |||
| 3404 | DAGCombinerInfo &DCI) const { | |||
| 3405 | EVT VT = N->getValueType(0); | |||
| 3406 | ||||
| 3407 | // Don't generate 24-bit multiplies on values that are in SGPRs, since | |||
| 3408 | // we only have a 32-bit scalar multiply (avoid values being moved to VGPRs | |||
| 3409 | // unnecessarily). isDivergent() is used as an approximation of whether the | |||
| 3410 | // value is in an SGPR. | |||
| 3411 | if (!N->isDivergent()) | |||
| 3412 | return SDValue(); | |||
| 3413 | ||||
| 3414 | unsigned Size = VT.getSizeInBits(); | |||
| 3415 | if (VT.isVector() || Size > 64) | |||
| 3416 | return SDValue(); | |||
| 3417 | ||||
| 3418 | // There are i16 integer mul/mad. | |||
| 3419 | if (Subtarget->has16BitInsts() && VT.getScalarType().bitsLE(MVT::i16)) | |||
| 3420 | return SDValue(); | |||
| 3421 | ||||
| 3422 | SelectionDAG &DAG = DCI.DAG; | |||
| 3423 | SDLoc DL(N); | |||
| 3424 | ||||
| 3425 | SDValue N0 = N->getOperand(0); | |||
| 3426 | SDValue N1 = N->getOperand(1); | |||
| 3427 | ||||
| 3428 | // SimplifyDemandedBits has the annoying habit of turning useful zero_extends | |||
| 3429 | // in the source into any_extends if the result of the mul is truncated. Since | |||
| 3430 | // we can assume the high bits are whatever we want, use the underlying value | |||
| 3431 | // to avoid the unknown high bits from interfering. | |||
| 3432 | if (N0.getOpcode() == ISD::ANY_EXTEND) | |||
| 3433 | N0 = N0.getOperand(0); | |||
| 3434 | ||||
| 3435 | if (N1.getOpcode() == ISD::ANY_EXTEND) | |||
| 3436 | N1 = N1.getOperand(0); | |||
| 3437 | ||||
| 3438 | SDValue Mul; | |||
| 3439 | ||||
| 3440 | if (Subtarget->hasMulU24() && isU24(N0, DAG) && isU24(N1, DAG)) { | |||
| 3441 | N0 = DAG.getZExtOrTrunc(N0, DL, MVT::i32); | |||
| 3442 | N1 = DAG.getZExtOrTrunc(N1, DL, MVT::i32); | |||
| 3443 | Mul = getMul24(DAG, DL, N0, N1, Size, false); | |||
| 3444 | } else if (Subtarget->hasMulI24() && isI24(N0, DAG) && isI24(N1, DAG)) { | |||
| 3445 | N0 = DAG.getSExtOrTrunc(N0, DL, MVT::i32); | |||
| 3446 | N1 = DAG.getSExtOrTrunc(N1, DL, MVT::i32); | |||
| 3447 | Mul = getMul24(DAG, DL, N0, N1, Size, true); | |||
| 3448 | } else { | |||
| 3449 | return SDValue(); | |||
| 3450 | } | |||
| 3451 | ||||
| 3452 | // We need to use sext even for MUL_U24, because MUL_U24 is used | |||
| 3453 | // for signed multiply of 8 and 16-bit types. | |||
| 3454 | return DAG.getSExtOrTrunc(Mul, DL, VT); | |||
| 3455 | } | |||
| 3456 | ||||
| 3457 | SDValue AMDGPUTargetLowering::performMulhsCombine(SDNode *N, | |||
| 3458 | DAGCombinerInfo &DCI) const { | |||
| 3459 | EVT VT = N->getValueType(0); | |||
| 3460 | ||||
| 3461 | if (!Subtarget->hasMulI24() || VT.isVector()) | |||
| 3462 | return SDValue(); | |||
| 3463 | ||||
| 3464 | // Don't generate 24-bit multiplies on values that are in SGPRs, since | |||
| 3465 | // we only have a 32-bit scalar multiply (avoid values being moved to VGPRs | |||
| 3466 | // unnecessarily). isDivergent() is used as an approximation of whether the | |||
| 3467 | // value is in an SGPR. | |||
| 3468 | // This doesn't apply if no s_mul_hi is available (since we'll end up with a | |||
| 3469 | // valu op anyway) | |||
| 3470 | if (Subtarget->hasSMulHi() && !N->isDivergent()) | |||
| 3471 | return SDValue(); | |||
| 3472 | ||||
| 3473 | SelectionDAG &DAG = DCI.DAG; | |||
| 3474 | SDLoc DL(N); | |||
| 3475 | ||||
| 3476 | SDValue N0 = N->getOperand(0); | |||
| 3477 | SDValue N1 = N->getOperand(1); | |||
| 3478 | ||||
| 3479 | if (!isI24(N0, DAG) || !isI24(N1, DAG)) | |||
| 3480 | return SDValue(); | |||
| 3481 | ||||
| 3482 | N0 = DAG.getSExtOrTrunc(N0, DL, MVT::i32); | |||
| 3483 | N1 = DAG.getSExtOrTrunc(N1, DL, MVT::i32); | |||
| 3484 | ||||
| 3485 | SDValue Mulhi = DAG.getNode(AMDGPUISD::MULHI_I24, DL, MVT::i32, N0, N1); | |||
| 3486 | DCI.AddToWorklist(Mulhi.getNode()); | |||
| 3487 | return DAG.getSExtOrTrunc(Mulhi, DL, VT); | |||
| 3488 | } | |||
| 3489 | ||||
| 3490 | SDValue AMDGPUTargetLowering::performMulhuCombine(SDNode *N, | |||
| 3491 | DAGCombinerInfo &DCI) const { | |||
| 3492 | EVT VT = N->getValueType(0); | |||
| 3493 | ||||
| 3494 | if (!Subtarget->hasMulU24() || VT.isVector() || VT.getSizeInBits() > 32) | |||
| 3495 | return SDValue(); | |||
| 3496 | ||||
| 3497 | // Don't generate 24-bit multiplies on values that are in SGPRs, since | |||
| 3498 | // we only have a 32-bit scalar multiply (avoid values being moved to VGPRs | |||
| 3499 | // unnecessarily). isDivergent() is used as an approximation of whether the | |||
| 3500 | // value is in an SGPR. | |||
| 3501 | // This doesn't apply if no s_mul_hi is available (since we'll end up with a | |||
| 3502 | // valu op anyway) | |||
| 3503 | if (Subtarget->hasSMulHi() && !N->isDivergent()) | |||
| 3504 | return SDValue(); | |||
| 3505 | ||||
| 3506 | SelectionDAG &DAG = DCI.DAG; | |||
| 3507 | SDLoc DL(N); | |||
| 3508 | ||||
| 3509 | SDValue N0 = N->getOperand(0); | |||
| 3510 | SDValue N1 = N->getOperand(1); | |||
| 3511 | ||||
| 3512 | if (!isU24(N0, DAG) || !isU24(N1, DAG)) | |||
| 3513 | return SDValue(); | |||
| 3514 | ||||
| 3515 | N0 = DAG.getZExtOrTrunc(N0, DL, MVT::i32); | |||
| 3516 | N1 = DAG.getZExtOrTrunc(N1, DL, MVT::i32); | |||
| 3517 | ||||
| 3518 | SDValue Mulhi = DAG.getNode(AMDGPUISD::MULHI_U24, DL, MVT::i32, N0, N1); | |||
| 3519 | DCI.AddToWorklist(Mulhi.getNode()); | |||
| 3520 | return DAG.getZExtOrTrunc(Mulhi, DL, VT); | |||
| 3521 | } | |||
| 3522 | ||||
| 3523 | static bool isNegativeOne(SDValue Val) { | |||
| 3524 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Val)) | |||
| 3525 | return C->isAllOnesValue(); | |||
| 3526 | return false; | |||
| 3527 | } | |||
| 3528 | ||||
| 3529 | SDValue AMDGPUTargetLowering::getFFBX_U32(SelectionDAG &DAG, | |||
| 3530 | SDValue Op, | |||
| 3531 | const SDLoc &DL, | |||
| 3532 | unsigned Opc) const { | |||
| 3533 | EVT VT = Op.getValueType(); | |||
| 3534 | EVT LegalVT = getTypeToTransformTo(*DAG.getContext(), VT); | |||
| 3535 | if (LegalVT != MVT::i32 && (Subtarget->has16BitInsts() && | |||
| 3536 | LegalVT != MVT::i16)) | |||
| 3537 | return SDValue(); | |||
| 3538 | ||||
| 3539 | if (VT != MVT::i32) | |||
| 3540 | Op = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i32, Op); | |||
| 3541 | ||||
| 3542 | SDValue FFBX = DAG.getNode(Opc, DL, MVT::i32, Op); | |||
| 3543 | if (VT != MVT::i32) | |||
| 3544 | FFBX = DAG.getNode(ISD::TRUNCATE, DL, VT, FFBX); | |||
| 3545 | ||||
| 3546 | return FFBX; | |||
| 3547 | } | |||
| 3548 | ||||
| 3549 | // The native instructions return -1 on 0 input. Optimize out a select that | |||
| 3550 | // produces -1 on 0. | |||
| 3551 | // | |||
| 3552 | // TODO: If zero is not undef, we could also do this if the output is compared | |||
| 3553 | // against the bitwidth. | |||
| 3554 | // | |||
| 3555 | // TODO: Should probably combine against FFBH_U32 instead of ctlz directly. | |||
| 3556 | SDValue AMDGPUTargetLowering::performCtlz_CttzCombine(const SDLoc &SL, SDValue Cond, | |||
| 3557 | SDValue LHS, SDValue RHS, | |||
| 3558 | DAGCombinerInfo &DCI) const { | |||
| 3559 | ConstantSDNode *CmpRhs = dyn_cast<ConstantSDNode>(Cond.getOperand(1)); | |||
| 3560 | if (!CmpRhs || !CmpRhs->isNullValue()) | |||
| 3561 | return SDValue(); | |||
| 3562 | ||||
| 3563 | SelectionDAG &DAG = DCI.DAG; | |||
| 3564 | ISD::CondCode CCOpcode = cast<CondCodeSDNode>(Cond.getOperand(2))->get(); | |||
| 3565 | SDValue CmpLHS = Cond.getOperand(0); | |||
| 3566 | ||||
| 3567 | // select (setcc x, 0, eq), -1, (ctlz_zero_undef x) -> ffbh_u32 x | |||
| 3568 | // select (setcc x, 0, eq), -1, (cttz_zero_undef x) -> ffbl_u32 x | |||
| 3569 | if (CCOpcode == ISD::SETEQ && | |||
| 3570 | (isCtlzOpc(RHS.getOpcode()) || isCttzOpc(RHS.getOpcode())) && | |||
| 3571 | RHS.getOperand(0) == CmpLHS && isNegativeOne(LHS)) { | |||
| 3572 | unsigned Opc = | |||
| 3573 | isCttzOpc(RHS.getOpcode()) ? AMDGPUISD::FFBL_B32 : AMDGPUISD::FFBH_U32; | |||
| 3574 | return getFFBX_U32(DAG, CmpLHS, SL, Opc); | |||
| 3575 | } | |||
| 3576 | ||||
| 3577 | // select (setcc x, 0, ne), (ctlz_zero_undef x), -1 -> ffbh_u32 x | |||
| 3578 | // select (setcc x, 0, ne), (cttz_zero_undef x), -1 -> ffbl_u32 x | |||
| 3579 | if (CCOpcode == ISD::SETNE && | |||
| 3580 | (isCtlzOpc(LHS.getOpcode()) || isCttzOpc(LHS.getOpcode())) && | |||
| 3581 | LHS.getOperand(0) == CmpLHS && isNegativeOne(RHS)) { | |||
| 3582 | unsigned Opc = | |||
| 3583 | isCttzOpc(LHS.getOpcode()) ? AMDGPUISD::FFBL_B32 : AMDGPUISD::FFBH_U32; | |||
| 3584 | ||||
| 3585 | return getFFBX_U32(DAG, CmpLHS, SL, Opc); | |||
| 3586 | } | |||
| 3587 | ||||
| 3588 | return SDValue(); | |||
| 3589 | } | |||
| 3590 | ||||
| 3591 | static SDValue distributeOpThroughSelect(TargetLowering::DAGCombinerInfo &DCI, | |||
| 3592 | unsigned Op, | |||
| 3593 | const SDLoc &SL, | |||
| 3594 | SDValue Cond, | |||
| 3595 | SDValue N1, | |||
| 3596 | SDValue N2) { | |||
| 3597 | SelectionDAG &DAG = DCI.DAG; | |||
| 3598 | EVT VT = N1.getValueType(); | |||
| 3599 | ||||
| 3600 | SDValue NewSelect = DAG.getNode(ISD::SELECT, SL, VT, Cond, | |||
| 3601 | N1.getOperand(0), N2.getOperand(0)); | |||
| 3602 | DCI.AddToWorklist(NewSelect.getNode()); | |||
| 3603 | return DAG.getNode(Op, SL, VT, NewSelect); | |||
| 3604 | } | |||
| 3605 | ||||
| 3606 | // Pull a free FP operation out of a select so it may fold into uses. | |||
| 3607 | // | |||
| 3608 | // select c, (fneg x), (fneg y) -> fneg (select c, x, y) | |||
| 3609 | // select c, (fneg x), k -> fneg (select c, x, (fneg k)) | |||
| 3610 | // | |||
| 3611 | // select c, (fabs x), (fabs y) -> fabs (select c, x, y) | |||
| 3612 | // select c, (fabs x), +k -> fabs (select c, x, k) | |||
| 3613 | static SDValue foldFreeOpFromSelect(TargetLowering::DAGCombinerInfo &DCI, | |||
| 3614 | SDValue N) { | |||
| 3615 | SelectionDAG &DAG = DCI.DAG; | |||
| 3616 | SDValue Cond = N.getOperand(0); | |||
| 3617 | SDValue LHS = N.getOperand(1); | |||
| 3618 | SDValue RHS = N.getOperand(2); | |||
| 3619 | ||||
| 3620 | EVT VT = N.getValueType(); | |||
| 3621 | if ((LHS.getOpcode() == ISD::FABS && RHS.getOpcode() == ISD::FABS) || | |||
| 3622 | (LHS.getOpcode() == ISD::FNEG && RHS.getOpcode() == ISD::FNEG)) { | |||
| 3623 | return distributeOpThroughSelect(DCI, LHS.getOpcode(), | |||
| 3624 | SDLoc(N), Cond, LHS, RHS); | |||
| 3625 | } | |||
| 3626 | ||||
| 3627 | bool Inv = false; | |||
| 3628 | if (RHS.getOpcode() == ISD::FABS || RHS.getOpcode() == ISD::FNEG) { | |||
| 3629 | std::swap(LHS, RHS); | |||
| 3630 | Inv = true; | |||
| 3631 | } | |||
| 3632 | ||||
| 3633 | // TODO: Support vector constants. | |||
| 3634 | ConstantFPSDNode *CRHS = dyn_cast<ConstantFPSDNode>(RHS); | |||
| 3635 | if ((LHS.getOpcode() == ISD::FNEG || LHS.getOpcode() == ISD::FABS) && CRHS) { | |||
| 3636 | SDLoc SL(N); | |||
| 3637 | // If one side is an fneg/fabs and the other is a constant, we can push the | |||
| 3638 | // fneg/fabs down. If it's an fabs, the constant needs to be non-negative. | |||
| 3639 | SDValue NewLHS = LHS.getOperand(0); | |||
| 3640 | SDValue NewRHS = RHS; | |||
| 3641 | ||||
| 3642 | // Careful: if the neg can be folded up, don't try to pull it back down. | |||
| 3643 | bool ShouldFoldNeg = true; | |||
| 3644 | ||||
| 3645 | if (NewLHS.hasOneUse()) { | |||
| 3646 | unsigned Opc = NewLHS.getOpcode(); | |||
| 3647 | if (LHS.getOpcode() == ISD::FNEG && fnegFoldsIntoOp(Opc)) | |||
| 3648 | ShouldFoldNeg = false; | |||
| 3649 | if (LHS.getOpcode() == ISD::FABS && Opc == ISD::FMUL) | |||
| 3650 | ShouldFoldNeg = false; | |||
| 3651 | } | |||
| 3652 | ||||
| 3653 | if (ShouldFoldNeg) { | |||
| 3654 | if (LHS.getOpcode() == ISD::FNEG) | |||
| 3655 | NewRHS = DAG.getNode(ISD::FNEG, SL, VT, RHS); | |||
| 3656 | else if (CRHS->isNegative()) | |||
| 3657 | return SDValue(); | |||
| 3658 | ||||
| 3659 | if (Inv) | |||
| 3660 | std::swap(NewLHS, NewRHS); | |||
| 3661 | ||||
| 3662 | SDValue NewSelect = DAG.getNode(ISD::SELECT, SL, VT, | |||
| 3663 | Cond, NewLHS, NewRHS); | |||
| 3664 | DCI.AddToWorklist(NewSelect.getNode()); | |||
| 3665 | return DAG.getNode(LHS.getOpcode(), SL, VT, NewSelect); | |||
| 3666 | } | |||
| 3667 | } | |||
| 3668 | ||||
| 3669 | return SDValue(); | |||
| 3670 | } | |||
| 3671 | ||||
| 3672 | ||||
| 3673 | SDValue AMDGPUTargetLowering::performSelectCombine(SDNode *N, | |||
| 3674 | DAGCombinerInfo &DCI) const { | |||
| 3675 | if (SDValue Folded = foldFreeOpFromSelect(DCI, SDValue(N, 0))) | |||
| 3676 | return Folded; | |||
| 3677 | ||||
| 3678 | SDValue Cond = N->getOperand(0); | |||
| 3679 | if (Cond.getOpcode() != ISD::SETCC) | |||
| 3680 | return SDValue(); | |||
| 3681 | ||||
| 3682 | EVT VT = N->getValueType(0); | |||
| 3683 | SDValue LHS = Cond.getOperand(0); | |||
| 3684 | SDValue RHS = Cond.getOperand(1); | |||
| 3685 | SDValue CC = Cond.getOperand(2); | |||
| 3686 | ||||
| 3687 | SDValue True = N->getOperand(1); | |||
| 3688 | SDValue False = N->getOperand(2); | |||
| 3689 | ||||
| 3690 | if (Cond.hasOneUse()) { // TODO: Look for multiple select uses. | |||
| 3691 | SelectionDAG &DAG = DCI.DAG; | |||
| 3692 | if (DAG.isConstantValueOfAnyType(True) && | |||
| 3693 | !DAG.isConstantValueOfAnyType(False)) { | |||
| 3694 | // Swap cmp + select pair to move constant to false input. | |||
| 3695 | // This will allow using VOPC cndmasks more often. | |||
| 3696 | // select (setcc x, y), k, x -> select (setccinv x, y), x, k | |||
| 3697 | ||||
| 3698 | SDLoc SL(N); | |||
| 3699 | ISD::CondCode NewCC = | |||
| 3700 | getSetCCInverse(cast<CondCodeSDNode>(CC)->get(), LHS.getValueType()); | |||
| 3701 | ||||
| 3702 | SDValue NewCond = DAG.getSetCC(SL, Cond.getValueType(), LHS, RHS, NewCC); | |||
| 3703 | return DAG.getNode(ISD::SELECT, SL, VT, NewCond, False, True); | |||
| 3704 | } | |||
| 3705 | ||||
| 3706 | if (VT == MVT::f32 && Subtarget->hasFminFmaxLegacy()) { | |||
| 3707 | SDValue MinMax | |||
| 3708 | = combineFMinMaxLegacy(SDLoc(N), VT, LHS, RHS, True, False, CC, DCI); | |||
| 3709 | // Revisit this node so we can catch min3/max3/med3 patterns. | |||
| 3710 | //DCI.AddToWorklist(MinMax.getNode()); | |||
| 3711 | return MinMax; | |||
| 3712 | } | |||
| 3713 | } | |||
| 3714 | ||||
| 3715 | // There's no reason to not do this if the condition has other uses. | |||
| 3716 | return performCtlz_CttzCombine(SDLoc(N), Cond, True, False, DCI); | |||
| 3717 | } | |||
| 3718 | ||||
| 3719 | static bool isInv2Pi(const APFloat &APF) { | |||
| 3720 | static const APFloat KF16(APFloat::IEEEhalf(), APInt(16, 0x3118)); | |||
| 3721 | static const APFloat KF32(APFloat::IEEEsingle(), APInt(32, 0x3e22f983)); | |||
| 3722 | static const APFloat KF64(APFloat::IEEEdouble(), APInt(64, 0x3fc45f306dc9c882)); | |||
| 3723 | ||||
| 3724 | return APF.bitwiseIsEqual(KF16) || | |||
| 3725 | APF.bitwiseIsEqual(KF32) || | |||
| 3726 | APF.bitwiseIsEqual(KF64); | |||
| 3727 | } | |||
| 3728 | ||||
| 3729 | // 0 and 1.0 / (0.5 * pi) do not have inline immmediates, so there is an | |||
| 3730 | // additional cost to negate them. | |||
| 3731 | bool AMDGPUTargetLowering::isConstantCostlierToNegate(SDValue N) const { | |||
| 3732 | if (const ConstantFPSDNode *C = isConstOrConstSplatFP(N)) { | |||
| 3733 | if (C->isZero() && !C->isNegative()) | |||
| 3734 | return true; | |||
| 3735 | ||||
| 3736 | if (Subtarget->hasInv2PiInlineImm() && isInv2Pi(C->getValueAPF())) | |||
| 3737 | return true; | |||
| 3738 | } | |||
| 3739 | ||||
| 3740 | return false; | |||
| 3741 | } | |||
| 3742 | ||||
| 3743 | static unsigned inverseMinMax(unsigned Opc) { | |||
| 3744 | switch (Opc) { | |||
| 3745 | case ISD::FMAXNUM: | |||
| 3746 | return ISD::FMINNUM; | |||
| 3747 | case ISD::FMINNUM: | |||
| 3748 | return ISD::FMAXNUM; | |||
| 3749 | case ISD::FMAXNUM_IEEE: | |||
| 3750 | return ISD::FMINNUM_IEEE; | |||
| 3751 | case ISD::FMINNUM_IEEE: | |||
| 3752 | return ISD::FMAXNUM_IEEE; | |||
| 3753 | case AMDGPUISD::FMAX_LEGACY: | |||
| 3754 | return AMDGPUISD::FMIN_LEGACY; | |||
| 3755 | case AMDGPUISD::FMIN_LEGACY: | |||
| 3756 | return AMDGPUISD::FMAX_LEGACY; | |||
| 3757 | default: | |||
| 3758 | llvm_unreachable("invalid min/max opcode")__builtin_unreachable(); | |||
| 3759 | } | |||
| 3760 | } | |||
| 3761 | ||||
| 3762 | SDValue AMDGPUTargetLowering::performFNegCombine(SDNode *N, | |||
| 3763 | DAGCombinerInfo &DCI) const { | |||
| 3764 | SelectionDAG &DAG = DCI.DAG; | |||
| 3765 | SDValue N0 = N->getOperand(0); | |||
| 3766 | EVT VT = N->getValueType(0); | |||
| 3767 | ||||
| 3768 | unsigned Opc = N0.getOpcode(); | |||
| 3769 | ||||
| 3770 | // If the input has multiple uses and we can either fold the negate down, or | |||
| 3771 | // the other uses cannot, give up. This both prevents unprofitable | |||
| 3772 | // transformations and infinite loops: we won't repeatedly try to fold around | |||
| 3773 | // a negate that has no 'good' form. | |||
| 3774 | if (N0.hasOneUse()) { | |||
| 3775 | // This may be able to fold into the source, but at a code size cost. Don't | |||
| 3776 | // fold if the fold into the user is free. | |||
| 3777 | if (allUsesHaveSourceMods(N, 0)) | |||
| 3778 | return SDValue(); | |||
| 3779 | } else { | |||
| 3780 | if (fnegFoldsIntoOp(Opc) && | |||
| 3781 | (allUsesHaveSourceMods(N) || !allUsesHaveSourceMods(N0.getNode()))) | |||
| 3782 | return SDValue(); | |||
| 3783 | } | |||
| 3784 | ||||
| 3785 | SDLoc SL(N); | |||
| 3786 | switch (Opc) { | |||
| 3787 | case ISD::FADD: { | |||
| 3788 | if (!mayIgnoreSignedZero(N0)) | |||
| 3789 | return SDValue(); | |||
| 3790 | ||||
| 3791 | // (fneg (fadd x, y)) -> (fadd (fneg x), (fneg y)) | |||
| 3792 | SDValue LHS = N0.getOperand(0); | |||
| 3793 | SDValue RHS = N0.getOperand(1); | |||
| 3794 | ||||
| 3795 | if (LHS.getOpcode() != ISD::FNEG) | |||
| 3796 | LHS = DAG.getNode(ISD::FNEG, SL, VT, LHS); | |||
| 3797 | else | |||
| 3798 | LHS = LHS.getOperand(0); | |||
| 3799 | ||||
| 3800 | if (RHS.getOpcode() != ISD::FNEG) | |||
| 3801 | RHS = DAG.getNode(ISD::FNEG, SL, VT, RHS); | |||
| 3802 | else | |||
| 3803 | RHS = RHS.getOperand(0); | |||
| 3804 | ||||
| 3805 | SDValue Res = DAG.getNode(ISD::FADD, SL, VT, LHS, RHS, N0->getFlags()); | |||
| 3806 | if (Res.getOpcode() != ISD::FADD) | |||
| 3807 | return SDValue(); // Op got folded away. | |||
| 3808 | if (!N0.hasOneUse()) | |||
| 3809 | DAG.ReplaceAllUsesWith(N0, DAG.getNode(ISD::FNEG, SL, VT, Res)); | |||
| 3810 | return Res; | |||
| 3811 | } | |||
| 3812 | case ISD::FMUL: | |||
| 3813 | case AMDGPUISD::FMUL_LEGACY: { | |||
| 3814 | // (fneg (fmul x, y)) -> (fmul x, (fneg y)) | |||
| 3815 | // (fneg (fmul_legacy x, y)) -> (fmul_legacy x, (fneg y)) | |||
| 3816 | SDValue LHS = N0.getOperand(0); | |||
| 3817 | SDValue RHS = N0.getOperand(1); | |||
| 3818 | ||||
| 3819 | if (LHS.getOpcode() == ISD::FNEG) | |||
| 3820 | LHS = LHS.getOperand(0); | |||
| 3821 | else if (RHS.getOpcode() == ISD::FNEG) | |||
| 3822 | RHS = RHS.getOperand(0); | |||
| 3823 | else | |||
| 3824 | RHS = DAG.getNode(ISD::FNEG, SL, VT, RHS); | |||
| 3825 | ||||
| 3826 | SDValue Res = DAG.getNode(Opc, SL, VT, LHS, RHS, N0->getFlags()); | |||
| 3827 | if (Res.getOpcode() != Opc) | |||
| 3828 | return SDValue(); // Op got folded away. | |||
| 3829 | if (!N0.hasOneUse()) | |||
| 3830 | DAG.ReplaceAllUsesWith(N0, DAG.getNode(ISD::FNEG, SL, VT, Res)); | |||
| 3831 | return Res; | |||
| 3832 | } | |||
| 3833 | case ISD::FMA: | |||
| 3834 | case ISD::FMAD: { | |||
| 3835 | // TODO: handle llvm.amdgcn.fma.legacy | |||
| 3836 | if (!mayIgnoreSignedZero(N0)) | |||
| 3837 | return SDValue(); | |||
| 3838 | ||||
| 3839 | // (fneg (fma x, y, z)) -> (fma x, (fneg y), (fneg z)) | |||
| 3840 | SDValue LHS = N0.getOperand(0); | |||
| 3841 | SDValue MHS = N0.getOperand(1); | |||
| 3842 | SDValue RHS = N0.getOperand(2); | |||
| 3843 | ||||
| 3844 | if (LHS.getOpcode() == ISD::FNEG) | |||
| 3845 | LHS = LHS.getOperand(0); | |||
| 3846 | else if (MHS.getOpcode() == ISD::FNEG) | |||
| 3847 | MHS = MHS.getOperand(0); | |||
| 3848 | else | |||
| 3849 | MHS = DAG.getNode(ISD::FNEG, SL, VT, MHS); | |||
| 3850 | ||||
| 3851 | if (RHS.getOpcode() != ISD::FNEG) | |||
| 3852 | RHS = DAG.getNode(ISD::FNEG, SL, VT, RHS); | |||
| 3853 | else | |||
| 3854 | RHS = RHS.getOperand(0); | |||
| 3855 | ||||
| 3856 | SDValue Res = DAG.getNode(Opc, SL, VT, LHS, MHS, RHS); | |||
| 3857 | if (Res.getOpcode() != Opc) | |||
| 3858 | return SDValue(); // Op got folded away. | |||
| 3859 | if (!N0.hasOneUse()) | |||
| 3860 | DAG.ReplaceAllUsesWith(N0, DAG.getNode(ISD::FNEG, SL, VT, Res)); | |||
| 3861 | return Res; | |||
| 3862 | } | |||
| 3863 | case ISD::FMAXNUM: | |||
| 3864 | case ISD::FMINNUM: | |||
| 3865 | case ISD::FMAXNUM_IEEE: | |||
| 3866 | case ISD::FMINNUM_IEEE: | |||
| 3867 | case AMDGPUISD::FMAX_LEGACY: | |||
| 3868 | case AMDGPUISD::FMIN_LEGACY: { | |||
| 3869 | // fneg (fmaxnum x, y) -> fminnum (fneg x), (fneg y) | |||
| 3870 | // fneg (fminnum x, y) -> fmaxnum (fneg x), (fneg y) | |||
| 3871 | // fneg (fmax_legacy x, y) -> fmin_legacy (fneg x), (fneg y) | |||
| 3872 | // fneg (fmin_legacy x, y) -> fmax_legacy (fneg x), (fneg y) | |||
| 3873 | ||||
| 3874 | SDValue LHS = N0.getOperand(0); | |||
| 3875 | SDValue RHS = N0.getOperand(1); | |||
| 3876 | ||||
| 3877 | // 0 doesn't have a negated inline immediate. | |||
| 3878 | // TODO: This constant check should be generalized to other operations. | |||
| 3879 | if (isConstantCostlierToNegate(RHS)) | |||
| 3880 | return SDValue(); | |||
| 3881 | ||||
| 3882 | SDValue NegLHS = DAG.getNode(ISD::FNEG, SL, VT, LHS); | |||
| 3883 | SDValue NegRHS = DAG.getNode(ISD::FNEG, SL, VT, RHS); | |||
| 3884 | unsigned Opposite = inverseMinMax(Opc); | |||
| 3885 | ||||
| 3886 | SDValue Res = DAG.getNode(Opposite, SL, VT, NegLHS, NegRHS, N0->getFlags()); | |||
| 3887 | if (Res.getOpcode() != Opposite) | |||
| 3888 | return SDValue(); // Op got folded away. | |||
| 3889 | if (!N0.hasOneUse()) | |||
| 3890 | DAG.ReplaceAllUsesWith(N0, DAG.getNode(ISD::FNEG, SL, VT, Res)); | |||
| 3891 | return Res; | |||
| 3892 | } | |||
| 3893 | case AMDGPUISD::FMED3: { | |||
| 3894 | SDValue Ops[3]; | |||
| 3895 | for (unsigned I = 0; I < 3; ++I) | |||
| 3896 | Ops[I] = DAG.getNode(ISD::FNEG, SL, VT, N0->getOperand(I), N0->getFlags()); | |||
| 3897 | ||||
| 3898 | SDValue Res = DAG.getNode(AMDGPUISD::FMED3, SL, VT, Ops, N0->getFlags()); | |||
| 3899 | if (Res.getOpcode() != AMDGPUISD::FMED3) | |||
| 3900 | return SDValue(); // Op got folded away. | |||
| 3901 | ||||
| 3902 | if (!N0.hasOneUse()) { | |||
| 3903 | SDValue Neg = DAG.getNode(ISD::FNEG, SL, VT, Res); | |||
| 3904 | DAG.ReplaceAllUsesWith(N0, Neg); | |||
| 3905 | ||||
| 3906 | for (SDNode *U : Neg->uses()) | |||
| 3907 | DCI.AddToWorklist(U); | |||
| 3908 | } | |||
| 3909 | ||||
| 3910 | return Res; | |||
| 3911 | } | |||
| 3912 | case ISD::FP_EXTEND: | |||
| 3913 | case ISD::FTRUNC: | |||
| 3914 | case ISD::FRINT: | |||
| 3915 | case ISD::FNEARBYINT: // XXX - Should fround be handled? | |||
| 3916 | case ISD::FSIN: | |||
| 3917 | case ISD::FCANONICALIZE: | |||
| 3918 | case AMDGPUISD::RCP: | |||
| 3919 | case AMDGPUISD::RCP_LEGACY: | |||
| 3920 | case AMDGPUISD::RCP_IFLAG: | |||
| 3921 | case AMDGPUISD::SIN_HW: { | |||
| 3922 | SDValue CvtSrc = N0.getOperand(0); | |||
| 3923 | if (CvtSrc.getOpcode() == ISD::FNEG) { | |||
| 3924 | // (fneg (fp_extend (fneg x))) -> (fp_extend x) | |||
| 3925 | // (fneg (rcp (fneg x))) -> (rcp x) | |||
| 3926 | return DAG.getNode(Opc, SL, VT, CvtSrc.getOperand(0)); | |||
| 3927 | } | |||
| 3928 | ||||
| 3929 | if (!N0.hasOneUse()) | |||
| 3930 | return SDValue(); | |||
| 3931 | ||||
| 3932 | // (fneg (fp_extend x)) -> (fp_extend (fneg x)) | |||
| 3933 | // (fneg (rcp x)) -> (rcp (fneg x)) | |||
| 3934 | SDValue Neg = DAG.getNode(ISD::FNEG, SL, CvtSrc.getValueType(), CvtSrc); | |||
| 3935 | return DAG.getNode(Opc, SL, VT, Neg, N0->getFlags()); | |||
| 3936 | } | |||
| 3937 | case ISD::FP_ROUND: { | |||
| 3938 | SDValue CvtSrc = N0.getOperand(0); | |||
| 3939 | ||||
| 3940 | if (CvtSrc.getOpcode() == ISD::FNEG) { | |||
| 3941 | // (fneg (fp_round (fneg x))) -> (fp_round x) | |||
| 3942 | return DAG.getNode(ISD::FP_ROUND, SL, VT, | |||
| 3943 | CvtSrc.getOperand(0), N0.getOperand(1)); | |||
| 3944 | } | |||
| 3945 | ||||
| 3946 | if (!N0.hasOneUse()) | |||
| 3947 | return SDValue(); | |||
| 3948 | ||||
| 3949 | // (fneg (fp_round x)) -> (fp_round (fneg x)) | |||
| 3950 | SDValue Neg = DAG.getNode(ISD::FNEG, SL, CvtSrc.getValueType(), CvtSrc); | |||
| 3951 | return DAG.getNode(ISD::FP_ROUND, SL, VT, Neg, N0.getOperand(1)); | |||
| 3952 | } | |||
| 3953 | case ISD::FP16_TO_FP: { | |||
| 3954 | // v_cvt_f32_f16 supports source modifiers on pre-VI targets without legal | |||
| 3955 | // f16, but legalization of f16 fneg ends up pulling it out of the source. | |||
| 3956 | // Put the fneg back as a legal source operation that can be matched later. | |||
| 3957 | SDLoc SL(N); | |||
| 3958 | ||||
| 3959 | SDValue Src = N0.getOperand(0); | |||
| 3960 | EVT SrcVT = Src.getValueType(); | |||
| 3961 | ||||
| 3962 | // fneg (fp16_to_fp x) -> fp16_to_fp (xor x, 0x8000) | |||
| 3963 | SDValue IntFNeg = DAG.getNode(ISD::XOR, SL, SrcVT, Src, | |||
| 3964 | DAG.getConstant(0x8000, SL, SrcVT)); | |||
| 3965 | return DAG.getNode(ISD::FP16_TO_FP, SL, N->getValueType(0), IntFNeg); | |||
| 3966 | } | |||
| 3967 | default: | |||
| 3968 | return SDValue(); | |||
| 3969 | } | |||
| 3970 | } | |||
| 3971 | ||||
| 3972 | SDValue AMDGPUTargetLowering::performFAbsCombine(SDNode *N, | |||
| 3973 | DAGCombinerInfo &DCI) const { | |||
| 3974 | SelectionDAG &DAG = DCI.DAG; | |||
| 3975 | SDValue N0 = N->getOperand(0); | |||
| 3976 | ||||
| 3977 | if (!N0.hasOneUse()) | |||
| 3978 | return SDValue(); | |||
| 3979 | ||||
| 3980 | switch (N0.getOpcode()) { | |||
| 3981 | case ISD::FP16_TO_FP: { | |||
| 3982 | assert(!Subtarget->has16BitInsts() && "should only see if f16 is illegal")((void)0); | |||
| 3983 | SDLoc SL(N); | |||
| 3984 | SDValue Src = N0.getOperand(0); | |||
| 3985 | EVT SrcVT = Src.getValueType(); | |||
| 3986 | ||||
| 3987 | // fabs (fp16_to_fp x) -> fp16_to_fp (and x, 0x7fff) | |||
| 3988 | SDValue IntFAbs = DAG.getNode(ISD::AND, SL, SrcVT, Src, | |||
| 3989 | DAG.getConstant(0x7fff, SL, SrcVT)); | |||
| 3990 | return DAG.getNode(ISD::FP16_TO_FP, SL, N->getValueType(0), IntFAbs); | |||
| 3991 | } | |||
| 3992 | default: | |||
| 3993 | return SDValue(); | |||
| 3994 | } | |||
| 3995 | } | |||
| 3996 | ||||
| 3997 | SDValue AMDGPUTargetLowering::performRcpCombine(SDNode *N, | |||
| 3998 | DAGCombinerInfo &DCI) const { | |||
| 3999 | const auto *CFP = dyn_cast<ConstantFPSDNode>(N->getOperand(0)); | |||
| 4000 | if (!CFP) | |||
| 4001 | return SDValue(); | |||
| 4002 | ||||
| 4003 | // XXX - Should this flush denormals? | |||
| 4004 | const APFloat &Val = CFP->getValueAPF(); | |||
| 4005 | APFloat One(Val.getSemantics(), "1.0"); | |||
| 4006 | return DCI.DAG.getConstantFP(One / Val, SDLoc(N), N->getValueType(0)); | |||
| 4007 | } | |||
| 4008 | ||||
| 4009 | SDValue AMDGPUTargetLowering::PerformDAGCombine(SDNode *N, | |||
| 4010 | DAGCombinerInfo &DCI) const { | |||
| 4011 | SelectionDAG &DAG = DCI.DAG; | |||
| 4012 | SDLoc DL(N); | |||
| 4013 | ||||
| 4014 | switch(N->getOpcode()) { | |||
| ||||
| 4015 | default: | |||
| 4016 | break; | |||
| 4017 | case ISD::BITCAST: { | |||
| 4018 | EVT DestVT = N->getValueType(0); | |||
| 4019 | ||||
| 4020 | // Push casts through vector builds. This helps avoid emitting a large | |||
| 4021 | // number of copies when materializing floating point vector constants. | |||
| 4022 | // | |||
| 4023 | // vNt1 bitcast (vNt0 (build_vector t0:x, t0:y)) => | |||
| 4024 | // vnt1 = build_vector (t1 (bitcast t0:x)), (t1 (bitcast t0:y)) | |||
| 4025 | if (DestVT.isVector()) { | |||
| 4026 | SDValue Src = N->getOperand(0); | |||
| 4027 | if (Src.getOpcode() == ISD::BUILD_VECTOR) { | |||
| 4028 | EVT SrcVT = Src.getValueType(); | |||
| 4029 | unsigned NElts = DestVT.getVectorNumElements(); | |||
| 4030 | ||||
| 4031 | if (SrcVT.getVectorNumElements() == NElts) { | |||
| 4032 | EVT DestEltVT = DestVT.getVectorElementType(); | |||
| 4033 | ||||
| 4034 | SmallVector<SDValue, 8> CastedElts; | |||
| 4035 | SDLoc SL(N); | |||
| 4036 | for (unsigned I = 0, E = SrcVT.getVectorNumElements(); I != E; ++I) { | |||
| 4037 | SDValue Elt = Src.getOperand(I); | |||
| 4038 | CastedElts.push_back(DAG.getNode(ISD::BITCAST, DL, DestEltVT, Elt)); | |||
| 4039 | } | |||
| 4040 | ||||
| 4041 | return DAG.getBuildVector(DestVT, SL, CastedElts); | |||
| 4042 | } | |||
| 4043 | } | |||
| 4044 | } | |||
| 4045 | ||||
| 4046 | if (DestVT.getSizeInBits() != 64 || !DestVT.isVector()) | |||
| 4047 | break; | |||
| 4048 | ||||
| 4049 | // Fold bitcasts of constants. | |||
| 4050 | // | |||
| 4051 | // v2i32 (bitcast i64:k) -> build_vector lo_32(k), hi_32(k) | |||
| 4052 | // TODO: Generalize and move to DAGCombiner | |||
| 4053 | SDValue Src = N->getOperand(0); | |||
| 4054 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Src)) { | |||
| 4055 | SDLoc SL(N); | |||
| 4056 | uint64_t CVal = C->getZExtValue(); | |||
| 4057 | SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, SL, MVT::v2i32, | |||
| 4058 | DAG.getConstant(Lo_32(CVal), SL, MVT::i32), | |||
| 4059 | DAG.getConstant(Hi_32(CVal), SL, MVT::i32)); | |||
| 4060 | return DAG.getNode(ISD::BITCAST, SL, DestVT, BV); | |||
| 4061 | } | |||
| 4062 | ||||
| 4063 | if (ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(Src)) { | |||
| 4064 | const APInt &Val = C->getValueAPF().bitcastToAPInt(); | |||
| 4065 | SDLoc SL(N); | |||
| 4066 | uint64_t CVal = Val.getZExtValue(); | |||
| 4067 | SDValue Vec = DAG.getNode(ISD::BUILD_VECTOR, SL, MVT::v2i32, | |||
| 4068 | DAG.getConstant(Lo_32(CVal), SL, MVT::i32), | |||
| 4069 | DAG.getConstant(Hi_32(CVal), SL, MVT::i32)); | |||
| 4070 | ||||
| 4071 | return DAG.getNode(ISD::BITCAST, SL, DestVT, Vec); | |||
| 4072 | } | |||
| 4073 | ||||
| 4074 | break; | |||
| 4075 | } | |||
| 4076 | case ISD::SHL: { | |||
| 4077 | if (DCI.getDAGCombineLevel() < AfterLegalizeDAG) | |||
| 4078 | break; | |||
| 4079 | ||||
| 4080 | return performShlCombine(N, DCI); | |||
| 4081 | } | |||
| 4082 | case ISD::SRL: { | |||
| 4083 | if (DCI.getDAGCombineLevel() < AfterLegalizeDAG) | |||
| 4084 | break; | |||
| 4085 | ||||
| 4086 | return performSrlCombine(N, DCI); | |||
| 4087 | } | |||
| 4088 | case ISD::SRA: { | |||
| 4089 | if (DCI.getDAGCombineLevel() < AfterLegalizeDAG) | |||
| 4090 | break; | |||
| 4091 | ||||
| 4092 | return performSraCombine(N, DCI); | |||
| 4093 | } | |||
| 4094 | case ISD::TRUNCATE: | |||
| 4095 | return performTruncateCombine(N, DCI); | |||
| 4096 | case ISD::MUL: | |||
| 4097 | return performMulCombine(N, DCI); | |||
| 4098 | case ISD::MULHS: | |||
| 4099 | return performMulhsCombine(N, DCI); | |||
| 4100 | case ISD::MULHU: | |||
| 4101 | return performMulhuCombine(N, DCI); | |||
| 4102 | case AMDGPUISD::MUL_I24: | |||
| 4103 | case AMDGPUISD::MUL_U24: | |||
| 4104 | case AMDGPUISD::MULHI_I24: | |||
| 4105 | case AMDGPUISD::MULHI_U24: | |||
| 4106 | return simplifyMul24(N, DCI); | |||
| 4107 | case ISD::SELECT: | |||
| 4108 | return performSelectCombine(N, DCI); | |||
| 4109 | case ISD::FNEG: | |||
| 4110 | return performFNegCombine(N, DCI); | |||
| 4111 | case ISD::FABS: | |||
| 4112 | return performFAbsCombine(N, DCI); | |||
| 4113 | case AMDGPUISD::BFE_I32: | |||
| 4114 | case AMDGPUISD::BFE_U32: { | |||
| 4115 | assert(!N->getValueType(0).isVector() &&((void)0) | |||
| 4116 | "Vector handling of BFE not implemented")((void)0); | |||
| 4117 | ConstantSDNode *Width = dyn_cast<ConstantSDNode>(N->getOperand(2)); | |||
| 4118 | if (!Width) | |||
| 4119 | break; | |||
| 4120 | ||||
| 4121 | uint32_t WidthVal = Width->getZExtValue() & 0x1f; | |||
| 4122 | if (WidthVal == 0) | |||
| 4123 | return DAG.getConstant(0, DL, MVT::i32); | |||
| 4124 | ||||
| 4125 | ConstantSDNode *Offset = dyn_cast<ConstantSDNode>(N->getOperand(1)); | |||
| 4126 | if (!Offset) | |||
| 4127 | break; | |||
| 4128 | ||||
| 4129 | SDValue BitsFrom = N->getOperand(0); | |||
| 4130 | uint32_t OffsetVal = Offset->getZExtValue() & 0x1f; | |||
| 4131 | ||||
| 4132 | bool Signed = N->getOpcode() == AMDGPUISD::BFE_I32; | |||
| 4133 | ||||
| 4134 | if (OffsetVal == 0) { | |||
| 4135 | // This is already sign / zero extended, so try to fold away extra BFEs. | |||
| 4136 | unsigned SignBits = Signed ? (32 - WidthVal + 1) : (32 - WidthVal); | |||
| 4137 | ||||
| 4138 | unsigned OpSignBits = DAG.ComputeNumSignBits(BitsFrom); | |||
| 4139 | if (OpSignBits >= SignBits) | |||
| 4140 | return BitsFrom; | |||
| 4141 | ||||
| 4142 | EVT SmallVT = EVT::getIntegerVT(*DAG.getContext(), WidthVal); | |||
| 4143 | if (Signed) { | |||
| 4144 | // This is a sign_extend_inreg. Replace it to take advantage of existing | |||
| 4145 | // DAG Combines. If not eliminated, we will match back to BFE during | |||
| 4146 | // selection. | |||
| 4147 | ||||
| 4148 | // TODO: The sext_inreg of extended types ends, although we can could | |||
| 4149 | // handle them in a single BFE. | |||
| 4150 | return DAG.getNode(ISD::SIGN_EXTEND_INREG, DL, MVT::i32, BitsFrom, | |||
| 4151 | DAG.getValueType(SmallVT)); | |||
| 4152 | } | |||
| 4153 | ||||
| 4154 | return DAG.getZeroExtendInReg(BitsFrom, DL, SmallVT); | |||
| 4155 | } | |||
| 4156 | ||||
| 4157 | if (ConstantSDNode *CVal = dyn_cast<ConstantSDNode>(BitsFrom)) { | |||
| 4158 | if (Signed) { | |||
| 4159 | return constantFoldBFE<int32_t>(DAG, | |||
| 4160 | CVal->getSExtValue(), | |||
| 4161 | OffsetVal, | |||
| 4162 | WidthVal, | |||
| 4163 | DL); | |||
| 4164 | } | |||
| 4165 | ||||
| 4166 | return constantFoldBFE<uint32_t>(DAG, | |||
| 4167 | CVal->getZExtValue(), | |||
| 4168 | OffsetVal, | |||
| 4169 | WidthVal, | |||
| 4170 | DL); | |||
| 4171 | } | |||
| 4172 | ||||
| 4173 | if ((OffsetVal + WidthVal) >= 32 && | |||
| 4174 | !(Subtarget->hasSDWA() && OffsetVal == 16 && WidthVal == 16)) { | |||
| 4175 | SDValue ShiftVal = DAG.getConstant(OffsetVal, DL, MVT::i32); | |||
| 4176 | return DAG.getNode(Signed ? ISD::SRA : ISD::SRL, DL, MVT::i32, | |||
| 4177 | BitsFrom, ShiftVal); | |||
| 4178 | } | |||
| 4179 | ||||
| 4180 | if (BitsFrom.hasOneUse()) { | |||
| 4181 | APInt Demanded = APInt::getBitsSet(32, | |||
| 4182 | OffsetVal, | |||
| 4183 | OffsetVal + WidthVal); | |||
| 4184 | ||||
| 4185 | KnownBits Known; | |||
| 4186 | TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(), | |||
| 4187 | !DCI.isBeforeLegalizeOps()); | |||
| 4188 | const TargetLowering &TLI = DAG.getTargetLoweringInfo(); | |||
| 4189 | if (TLI.ShrinkDemandedConstant(BitsFrom, Demanded, TLO) || | |||
| 4190 | TLI.SimplifyDemandedBits(BitsFrom, Demanded, Known, TLO)) { | |||
| 4191 | DCI.CommitTargetLoweringOpt(TLO); | |||
| 4192 | } | |||
| 4193 | } | |||
| 4194 | ||||
| 4195 | break; | |||
| 4196 | } | |||
| 4197 | case ISD::LOAD: | |||
| 4198 | return performLoadCombine(N, DCI); | |||
| 4199 | case ISD::STORE: | |||
| 4200 | return performStoreCombine(N, DCI); | |||
| 4201 | case AMDGPUISD::RCP: | |||
| 4202 | case AMDGPUISD::RCP_IFLAG: | |||
| 4203 | return performRcpCombine(N, DCI); | |||
| 4204 | case ISD::AssertZext: | |||
| 4205 | case ISD::AssertSext: | |||
| 4206 | return performAssertSZExtCombine(N, DCI); | |||
| 4207 | case ISD::INTRINSIC_WO_CHAIN: | |||
| 4208 | return performIntrinsicWOChainCombine(N, DCI); | |||
| 4209 | } | |||
| 4210 | return SDValue(); | |||
| 4211 | } | |||
| 4212 | ||||
| 4213 | //===----------------------------------------------------------------------===// | |||
| 4214 | // Helper functions | |||
| 4215 | //===----------------------------------------------------------------------===// | |||
| 4216 | ||||
| 4217 | SDValue AMDGPUTargetLowering::CreateLiveInRegister(SelectionDAG &DAG, | |||
| 4218 | const TargetRegisterClass *RC, | |||
| 4219 | Register Reg, EVT VT, | |||
| 4220 | const SDLoc &SL, | |||
| 4221 | bool RawReg) const { | |||
| 4222 | MachineFunction &MF = DAG.getMachineFunction(); | |||
| 4223 | MachineRegisterInfo &MRI = MF.getRegInfo(); | |||
| 4224 | Register VReg; | |||
| 4225 | ||||
| 4226 | if (!MRI.isLiveIn(Reg)) { | |||
| 4227 | VReg = MRI.createVirtualRegister(RC); | |||
| 4228 | MRI.addLiveIn(Reg, VReg); | |||
| 4229 | } else { | |||
| 4230 | VReg = MRI.getLiveInVirtReg(Reg); | |||
| 4231 | } | |||
| 4232 | ||||
| 4233 | if (RawReg) | |||
| 4234 | return DAG.getRegister(VReg, VT); | |||
| 4235 | ||||
| 4236 | return DAG.getCopyFromReg(DAG.getEntryNode(), SL, VReg, VT); | |||
| 4237 | } | |||
| 4238 | ||||
| 4239 | // This may be called multiple times, and nothing prevents creating multiple | |||
| 4240 | // objects at the same offset. See if we already defined this object. | |||
| 4241 | static int getOrCreateFixedStackObject(MachineFrameInfo &MFI, unsigned Size, | |||
| 4242 | int64_t Offset) { | |||
| 4243 | for (int I = MFI.getObjectIndexBegin(); I < 0; ++I) { | |||
| 4244 | if (MFI.getObjectOffset(I) == Offset) { | |||
| 4245 | assert(MFI.getObjectSize(I) == Size)((void)0); | |||
| 4246 | return I; | |||
| 4247 | } | |||
| 4248 | } | |||
| 4249 | ||||
| 4250 | return MFI.CreateFixedObject(Size, Offset, true); | |||
| 4251 | } | |||
| 4252 | ||||
| 4253 | SDValue AMDGPUTargetLowering::loadStackInputValue(SelectionDAG &DAG, | |||
| 4254 | EVT VT, | |||
| 4255 | const SDLoc &SL, | |||
| 4256 | int64_t Offset) const { | |||
| 4257 | MachineFunction &MF = DAG.getMachineFunction(); | |||
| 4258 | MachineFrameInfo &MFI = MF.getFrameInfo(); | |||
| 4259 | int FI = getOrCreateFixedStackObject(MFI, VT.getStoreSize(), Offset); | |||
| 4260 | ||||
| 4261 | auto SrcPtrInfo = MachinePointerInfo::getStack(MF, Offset); | |||
| 4262 | SDValue Ptr = DAG.getFrameIndex(FI, MVT::i32); | |||
| 4263 | ||||
| 4264 | return DAG.getLoad(VT, SL, DAG.getEntryNode(), Ptr, SrcPtrInfo, Align(4), | |||
| 4265 | MachineMemOperand::MODereferenceable | | |||
| 4266 | MachineMemOperand::MOInvariant); | |||
| 4267 | } | |||
| 4268 | ||||
| 4269 | SDValue AMDGPUTargetLowering::storeStackInputValue(SelectionDAG &DAG, | |||
| 4270 | const SDLoc &SL, | |||
| 4271 | SDValue Chain, | |||
| 4272 | SDValue ArgVal, | |||
| 4273 | int64_t Offset) const { | |||
| 4274 | MachineFunction &MF = DAG.getMachineFunction(); | |||
| 4275 | MachinePointerInfo DstInfo = MachinePointerInfo::getStack(MF, Offset); | |||
| 4276 | const SIMachineFunctionInfo *Info = MF.getInfo<SIMachineFunctionInfo>(); | |||
| 4277 | ||||
| 4278 | SDValue Ptr = DAG.getConstant(Offset, SL, MVT::i32); | |||
| 4279 | // Stores to the argument stack area are relative to the stack pointer. | |||
| 4280 | SDValue SP = | |||
| 4281 | DAG.getCopyFromReg(Chain, SL, Info->getStackPtrOffsetReg(), MVT::i32); | |||
| 4282 | Ptr = DAG.getNode(ISD::ADD, SL, MVT::i32, SP, Ptr); | |||
| 4283 | SDValue Store = DAG.getStore(Chain, SL, ArgVal, Ptr, DstInfo, Align(4), | |||
| 4284 | MachineMemOperand::MODereferenceable); | |||
| 4285 | return Store; | |||
| 4286 | } | |||
| 4287 | ||||
| 4288 | SDValue AMDGPUTargetLowering::loadInputValue(SelectionDAG &DAG, | |||
| 4289 | const TargetRegisterClass *RC, | |||
| 4290 | EVT VT, const SDLoc &SL, | |||
| 4291 | const ArgDescriptor &Arg) const { | |||
| 4292 | assert(Arg && "Attempting to load missing argument")((void)0); | |||
| 4293 | ||||
| 4294 | SDValue V = Arg.isRegister() ? | |||
| 4295 | CreateLiveInRegister(DAG, RC, Arg.getRegister(), VT, SL) : | |||
| 4296 | loadStackInputValue(DAG, VT, SL, Arg.getStackOffset()); | |||
| 4297 | ||||
| 4298 | if (!Arg.isMasked()) | |||
| 4299 | return V; | |||
| 4300 | ||||
| 4301 | unsigned Mask = Arg.getMask(); | |||
| 4302 | unsigned Shift = countTrailingZeros<unsigned>(Mask); | |||
| 4303 | V = DAG.getNode(ISD::SRL, SL, VT, V, | |||
| 4304 | DAG.getShiftAmountConstant(Shift, VT, SL)); | |||
| 4305 | return DAG.getNode(ISD::AND, SL, VT, V, | |||
| 4306 | DAG.getConstant(Mask >> Shift, SL, VT)); | |||
| 4307 | } | |||
| 4308 | ||||
| 4309 | uint32_t AMDGPUTargetLowering::getImplicitParameterOffset( | |||
| 4310 | const MachineFunction &MF, const ImplicitParameter Param) const { | |||
| 4311 | const AMDGPUMachineFunction *MFI = MF.getInfo<AMDGPUMachineFunction>(); | |||
| 4312 | const AMDGPUSubtarget &ST = | |||
| 4313 | AMDGPUSubtarget::get(getTargetMachine(), MF.getFunction()); | |||
| 4314 | unsigned ExplicitArgOffset = ST.getExplicitKernelArgOffset(MF.getFunction()); | |||
| 4315 | const Align Alignment = ST.getAlignmentForImplicitArgPtr(); | |||
| 4316 | uint64_t ArgOffset = alignTo(MFI->getExplicitKernArgSize(), Alignment) + | |||
| 4317 | ExplicitArgOffset; | |||
| 4318 | switch (Param) { | |||
| 4319 | case GRID_DIM: | |||
| 4320 | return ArgOffset; | |||
| 4321 | case GRID_OFFSET: | |||
| 4322 | return ArgOffset + 4; | |||
| 4323 | } | |||
| 4324 | llvm_unreachable("unexpected implicit parameter type")__builtin_unreachable(); | |||
| 4325 | } | |||
| 4326 | ||||
| 4327 | #define NODE_NAME_CASE(node)case AMDGPUISD::node: return "node"; case AMDGPUISD::node: return #node; | |||
| 4328 | ||||
| 4329 | const char* AMDGPUTargetLowering::getTargetNodeName(unsigned Opcode) const { | |||
| 4330 | switch ((AMDGPUISD::NodeType)Opcode) { | |||
| 4331 | case AMDGPUISD::FIRST_NUMBER: break; | |||
| 4332 | // AMDIL DAG nodes | |||
| 4333 | NODE_NAME_CASE(UMUL)case AMDGPUISD::UMUL: return "UMUL";; | |||
| 4334 | NODE_NAME_CASE(BRANCH_COND)case AMDGPUISD::BRANCH_COND: return "BRANCH_COND";; | |||
| 4335 | ||||
| 4336 | // AMDGPU DAG nodes | |||
| 4337 | NODE_NAME_CASE(IF)case AMDGPUISD::IF: return "IF"; | |||
| 4338 | NODE_NAME_CASE(ELSE)case AMDGPUISD::ELSE: return "ELSE"; | |||
| 4339 | NODE_NAME_CASE(LOOP)case AMDGPUISD::LOOP: return "LOOP"; | |||
| 4340 | NODE_NAME_CASE(CALL)case AMDGPUISD::CALL: return "CALL"; | |||
| 4341 | NODE_NAME_CASE(TC_RETURN)case AMDGPUISD::TC_RETURN: return "TC_RETURN"; | |||
| 4342 | NODE_NAME_CASE(TRAP)case AMDGPUISD::TRAP: return "TRAP"; | |||
| 4343 | NODE_NAME_CASE(RET_FLAG)case AMDGPUISD::RET_FLAG: return "RET_FLAG"; | |||
| 4344 | NODE_NAME_CASE(RETURN_TO_EPILOG)case AMDGPUISD::RETURN_TO_EPILOG: return "RETURN_TO_EPILOG"; | |||
| 4345 | NODE_NAME_CASE(ENDPGM)case AMDGPUISD::ENDPGM: return "ENDPGM"; | |||
| 4346 | NODE_NAME_CASE(DWORDADDR)case AMDGPUISD::DWORDADDR: return "DWORDADDR"; | |||
| 4347 | NODE_NAME_CASE(FRACT)case AMDGPUISD::FRACT: return "FRACT"; | |||
| 4348 | NODE_NAME_CASE(SETCC)case AMDGPUISD::SETCC: return "SETCC"; | |||
| 4349 | NODE_NAME_CASE(SETREG)case AMDGPUISD::SETREG: return "SETREG"; | |||
| 4350 | NODE_NAME_CASE(DENORM_MODE)case AMDGPUISD::DENORM_MODE: return "DENORM_MODE"; | |||
| 4351 | NODE_NAME_CASE(FMA_W_CHAIN)case AMDGPUISD::FMA_W_CHAIN: return "FMA_W_CHAIN"; | |||
| 4352 | NODE_NAME_CASE(FMUL_W_CHAIN)case AMDGPUISD::FMUL_W_CHAIN: return "FMUL_W_CHAIN"; | |||
| 4353 | NODE_NAME_CASE(CLAMP)case AMDGPUISD::CLAMP: return "CLAMP"; | |||
| 4354 | NODE_NAME_CASE(COS_HW)case AMDGPUISD::COS_HW: return "COS_HW"; | |||
| 4355 | NODE_NAME_CASE(SIN_HW)case AMDGPUISD::SIN_HW: return "SIN_HW"; | |||
| 4356 | NODE_NAME_CASE(FMAX_LEGACY)case AMDGPUISD::FMAX_LEGACY: return "FMAX_LEGACY"; | |||
| 4357 | NODE_NAME_CASE(FMIN_LEGACY)case AMDGPUISD::FMIN_LEGACY: return "FMIN_LEGACY"; | |||
| 4358 | NODE_NAME_CASE(FMAX3)case AMDGPUISD::FMAX3: return "FMAX3"; | |||
| 4359 | NODE_NAME_CASE(SMAX3)case AMDGPUISD::SMAX3: return "SMAX3"; | |||
| 4360 | NODE_NAME_CASE(UMAX3)case AMDGPUISD::UMAX3: return "UMAX3"; | |||
| 4361 | NODE_NAME_CASE(FMIN3)case AMDGPUISD::FMIN3: return "FMIN3"; | |||
| 4362 | NODE_NAME_CASE(SMIN3)case AMDGPUISD::SMIN3: return "SMIN3"; | |||
| 4363 | NODE_NAME_CASE(UMIN3)case AMDGPUISD::UMIN3: return "UMIN3"; | |||
| 4364 | NODE_NAME_CASE(FMED3)case AMDGPUISD::FMED3: return "FMED3"; | |||
| 4365 | NODE_NAME_CASE(SMED3)case AMDGPUISD::SMED3: return "SMED3"; | |||
| 4366 | NODE_NAME_CASE(UMED3)case AMDGPUISD::UMED3: return "UMED3"; | |||
| 4367 | NODE_NAME_CASE(FDOT2)case AMDGPUISD::FDOT2: return "FDOT2"; | |||
| 4368 | NODE_NAME_CASE(URECIP)case AMDGPUISD::URECIP: return "URECIP"; | |||
| 4369 | NODE_NAME_CASE(DIV_SCALE)case AMDGPUISD::DIV_SCALE: return "DIV_SCALE"; | |||
| 4370 | NODE_NAME_CASE(DIV_FMAS)case AMDGPUISD::DIV_FMAS: return "DIV_FMAS"; | |||
| 4371 | NODE_NAME_CASE(DIV_FIXUP)case AMDGPUISD::DIV_FIXUP: return "DIV_FIXUP"; | |||
| 4372 | NODE_NAME_CASE(FMAD_FTZ)case AMDGPUISD::FMAD_FTZ: return "FMAD_FTZ"; | |||
| 4373 | NODE_NAME_CASE(RCP)case AMDGPUISD::RCP: return "RCP"; | |||
| 4374 | NODE_NAME_CASE(RSQ)case AMDGPUISD::RSQ: return "RSQ"; | |||
| 4375 | NODE_NAME_CASE(RCP_LEGACY)case AMDGPUISD::RCP_LEGACY: return "RCP_LEGACY"; | |||
| 4376 | NODE_NAME_CASE(RCP_IFLAG)case AMDGPUISD::RCP_IFLAG: return "RCP_IFLAG"; | |||
| 4377 | NODE_NAME_CASE(FMUL_LEGACY)case AMDGPUISD::FMUL_LEGACY: return "FMUL_LEGACY"; | |||
| 4378 | NODE_NAME_CASE(RSQ_CLAMP)case AMDGPUISD::RSQ_CLAMP: return "RSQ_CLAMP"; | |||
| 4379 | NODE_NAME_CASE(LDEXP)case AMDGPUISD::LDEXP: return "LDEXP"; | |||
| 4380 | NODE_NAME_CASE(FP_CLASS)case AMDGPUISD::FP_CLASS: return "FP_CLASS"; | |||
| 4381 | NODE_NAME_CASE(DOT4)case AMDGPUISD::DOT4: return "DOT4"; | |||
| 4382 | NODE_NAME_CASE(CARRY)case AMDGPUISD::CARRY: return "CARRY"; | |||
| 4383 | NODE_NAME_CASE(BORROW)case AMDGPUISD::BORROW: return "BORROW"; | |||
| 4384 | NODE_NAME_CASE(BFE_U32)case AMDGPUISD::BFE_U32: return "BFE_U32"; | |||
| 4385 | NODE_NAME_CASE(BFE_I32)case AMDGPUISD::BFE_I32: return "BFE_I32"; | |||
| 4386 | NODE_NAME_CASE(BFI)case AMDGPUISD::BFI: return "BFI"; | |||
| 4387 | NODE_NAME_CASE(BFM)case AMDGPUISD::BFM: return "BFM"; | |||
| 4388 | NODE_NAME_CASE(FFBH_U32)case AMDGPUISD::FFBH_U32: return "FFBH_U32"; | |||
| 4389 | NODE_NAME_CASE(FFBH_I32)case AMDGPUISD::FFBH_I32: return "FFBH_I32"; | |||
| 4390 | NODE_NAME_CASE(FFBL_B32)case AMDGPUISD::FFBL_B32: return "FFBL_B32"; | |||
| 4391 | NODE_NAME_CASE(MUL_U24)case AMDGPUISD::MUL_U24: return "MUL_U24"; | |||
| 4392 | NODE_NAME_CASE(MUL_I24)case AMDGPUISD::MUL_I24: return "MUL_I24"; | |||
| 4393 | NODE_NAME_CASE(MULHI_U24)case AMDGPUISD::MULHI_U24: return "MULHI_U24"; | |||
| 4394 | NODE_NAME_CASE(MULHI_I24)case AMDGPUISD::MULHI_I24: return "MULHI_I24"; | |||
| 4395 | NODE_NAME_CASE(MAD_U24)case AMDGPUISD::MAD_U24: return "MAD_U24"; | |||
| 4396 | NODE_NAME_CASE(MAD_I24)case AMDGPUISD::MAD_I24: return "MAD_I24"; | |||
| 4397 | NODE_NAME_CASE(MAD_I64_I32)case AMDGPUISD::MAD_I64_I32: return "MAD_I64_I32"; | |||
| 4398 | NODE_NAME_CASE(MAD_U64_U32)case AMDGPUISD::MAD_U64_U32: return "MAD_U64_U32"; | |||
| 4399 | NODE_NAME_CASE(PERM)case AMDGPUISD::PERM: return "PERM"; | |||
| 4400 | NODE_NAME_CASE(TEXTURE_FETCH)case AMDGPUISD::TEXTURE_FETCH: return "TEXTURE_FETCH"; | |||
| 4401 | NODE_NAME_CASE(R600_EXPORT)case AMDGPUISD::R600_EXPORT: return "R600_EXPORT"; | |||
| 4402 | NODE_NAME_CASE(CONST_ADDRESS)case AMDGPUISD::CONST_ADDRESS: return "CONST_ADDRESS"; | |||
| 4403 | NODE_NAME_CASE(REGISTER_LOAD)case AMDGPUISD::REGISTER_LOAD: return "REGISTER_LOAD"; | |||
| 4404 | NODE_NAME_CASE(REGISTER_STORE)case AMDGPUISD::REGISTER_STORE: return "REGISTER_STORE"; | |||
| 4405 | NODE_NAME_CASE(SAMPLE)case AMDGPUISD::SAMPLE: return "SAMPLE"; | |||
| 4406 | NODE_NAME_CASE(SAMPLEB)case AMDGPUISD::SAMPLEB: return "SAMPLEB"; | |||
| 4407 | NODE_NAME_CASE(SAMPLED)case AMDGPUISD::SAMPLED: return "SAMPLED"; | |||
| 4408 | NODE_NAME_CASE(SAMPLEL)case AMDGPUISD::SAMPLEL: return "SAMPLEL"; | |||
| 4409 | NODE_NAME_CASE(CVT_F32_UBYTE0)case AMDGPUISD::CVT_F32_UBYTE0: return "CVT_F32_UBYTE0"; | |||
| 4410 | NODE_NAME_CASE(CVT_F32_UBYTE1)case AMDGPUISD::CVT_F32_UBYTE1: return "CVT_F32_UBYTE1"; | |||
| 4411 | NODE_NAME_CASE(CVT_F32_UBYTE2)case AMDGPUISD::CVT_F32_UBYTE2: return "CVT_F32_UBYTE2"; | |||
| 4412 | NODE_NAME_CASE(CVT_F32_UBYTE3)case AMDGPUISD::CVT_F32_UBYTE3: return "CVT_F32_UBYTE3"; | |||
| 4413 | NODE_NAME_CASE(CVT_PKRTZ_F16_F32)case AMDGPUISD::CVT_PKRTZ_F16_F32: return "CVT_PKRTZ_F16_F32" ; | |||
| 4414 | NODE_NAME_CASE(CVT_PKNORM_I16_F32)case AMDGPUISD::CVT_PKNORM_I16_F32: return "CVT_PKNORM_I16_F32" ; | |||
| 4415 | NODE_NAME_CASE(CVT_PKNORM_U16_F32)case AMDGPUISD::CVT_PKNORM_U16_F32: return "CVT_PKNORM_U16_F32" ; | |||
| 4416 | NODE_NAME_CASE(CVT_PK_I16_I32)case AMDGPUISD::CVT_PK_I16_I32: return "CVT_PK_I16_I32"; | |||
| 4417 | NODE_NAME_CASE(CVT_PK_U16_U32)case AMDGPUISD::CVT_PK_U16_U32: return "CVT_PK_U16_U32"; | |||
| 4418 | NODE_NAME_CASE(FP_TO_FP16)case AMDGPUISD::FP_TO_FP16: return "FP_TO_FP16"; | |||
| 4419 | NODE_NAME_CASE(BUILD_VERTICAL_VECTOR)case AMDGPUISD::BUILD_VERTICAL_VECTOR: return "BUILD_VERTICAL_VECTOR" ; | |||
| 4420 | NODE_NAME_CASE(CONST_DATA_PTR)case AMDGPUISD::CONST_DATA_PTR: return "CONST_DATA_PTR"; | |||
| 4421 | NODE_NAME_CASE(PC_ADD_REL_OFFSET)case AMDGPUISD::PC_ADD_REL_OFFSET: return "PC_ADD_REL_OFFSET" ; | |||
| 4422 | NODE_NAME_CASE(LDS)case AMDGPUISD::LDS: return "LDS"; | |||
| 4423 | NODE_NAME_CASE(DUMMY_CHAIN)case AMDGPUISD::DUMMY_CHAIN: return "DUMMY_CHAIN"; | |||
| 4424 | case AMDGPUISD::FIRST_MEM_OPCODE_NUMBER: break; | |||
| 4425 | NODE_NAME_CASE(LOAD_D16_HI)case AMDGPUISD::LOAD_D16_HI: return "LOAD_D16_HI"; | |||
| 4426 | NODE_NAME_CASE(LOAD_D16_LO)case AMDGPUISD::LOAD_D16_LO: return "LOAD_D16_LO"; | |||
| 4427 | NODE_NAME_CASE(LOAD_D16_HI_I8)case AMDGPUISD::LOAD_D16_HI_I8: return "LOAD_D16_HI_I8"; | |||
| 4428 | NODE_NAME_CASE(LOAD_D16_HI_U8)case AMDGPUISD::LOAD_D16_HI_U8: return "LOAD_D16_HI_U8"; | |||
| 4429 | NODE_NAME_CASE(LOAD_D16_LO_I8)case AMDGPUISD::LOAD_D16_LO_I8: return "LOAD_D16_LO_I8"; | |||
| 4430 | NODE_NAME_CASE(LOAD_D16_LO_U8)case AMDGPUISD::LOAD_D16_LO_U8: return "LOAD_D16_LO_U8"; | |||
| 4431 | NODE_NAME_CASE(STORE_MSKOR)case AMDGPUISD::STORE_MSKOR: return "STORE_MSKOR"; | |||
| 4432 | NODE_NAME_CASE(LOAD_CONSTANT)case AMDGPUISD::LOAD_CONSTANT: return "LOAD_CONSTANT"; | |||
| 4433 | NODE_NAME_CASE(TBUFFER_STORE_FORMAT)case AMDGPUISD::TBUFFER_STORE_FORMAT: return "TBUFFER_STORE_FORMAT" ; | |||
| 4434 | NODE_NAME_CASE(TBUFFER_STORE_FORMAT_D16)case AMDGPUISD::TBUFFER_STORE_FORMAT_D16: return "TBUFFER_STORE_FORMAT_D16" ; | |||
| 4435 | NODE_NAME_CASE(TBUFFER_LOAD_FORMAT)case AMDGPUISD::TBUFFER_LOAD_FORMAT: return "TBUFFER_LOAD_FORMAT" ; | |||
| 4436 | NODE_NAME_CASE(TBUFFER_LOAD_FORMAT_D16)case AMDGPUISD::TBUFFER_LOAD_FORMAT_D16: return "TBUFFER_LOAD_FORMAT_D16" ; | |||
| 4437 | NODE_NAME_CASE(DS_ORDERED_COUNT)case AMDGPUISD::DS_ORDERED_COUNT: return "DS_ORDERED_COUNT"; | |||
| 4438 | NODE_NAME_CASE(ATOMIC_CMP_SWAP)case AMDGPUISD::ATOMIC_CMP_SWAP: return "ATOMIC_CMP_SWAP"; | |||
| 4439 | NODE_NAME_CASE(ATOMIC_INC)case AMDGPUISD::ATOMIC_INC: return "ATOMIC_INC"; | |||
| 4440 | NODE_NAME_CASE(ATOMIC_DEC)case AMDGPUISD::ATOMIC_DEC: return "ATOMIC_DEC"; | |||
| 4441 | NODE_NAME_CASE(ATOMIC_LOAD_FMIN)case AMDGPUISD::ATOMIC_LOAD_FMIN: return "ATOMIC_LOAD_FMIN"; | |||
| 4442 | NODE_NAME_CASE(ATOMIC_LOAD_FMAX)case AMDGPUISD::ATOMIC_LOAD_FMAX: return "ATOMIC_LOAD_FMAX"; | |||
| 4443 | NODE_NAME_CASE(BUFFER_LOAD)case AMDGPUISD::BUFFER_LOAD: return "BUFFER_LOAD"; | |||
| 4444 | NODE_NAME_CASE(BUFFER_LOAD_UBYTE)case AMDGPUISD::BUFFER_LOAD_UBYTE: return "BUFFER_LOAD_UBYTE" ; | |||
| 4445 | NODE_NAME_CASE(BUFFER_LOAD_USHORT)case AMDGPUISD::BUFFER_LOAD_USHORT: return "BUFFER_LOAD_USHORT" ; | |||
| 4446 | NODE_NAME_CASE(BUFFER_LOAD_BYTE)case AMDGPUISD::BUFFER_LOAD_BYTE: return "BUFFER_LOAD_BYTE"; | |||
| 4447 | NODE_NAME_CASE(BUFFER_LOAD_SHORT)case AMDGPUISD::BUFFER_LOAD_SHORT: return "BUFFER_LOAD_SHORT" ; | |||
| 4448 | NODE_NAME_CASE(BUFFER_LOAD_FORMAT)case AMDGPUISD::BUFFER_LOAD_FORMAT: return "BUFFER_LOAD_FORMAT" ; | |||
| 4449 | NODE_NAME_CASE(BUFFER_LOAD_FORMAT_D16)case AMDGPUISD::BUFFER_LOAD_FORMAT_D16: return "BUFFER_LOAD_FORMAT_D16" ; | |||
| 4450 | NODE_NAME_CASE(SBUFFER_LOAD)case AMDGPUISD::SBUFFER_LOAD: return "SBUFFER_LOAD"; | |||
| 4451 | NODE_NAME_CASE(BUFFER_STORE)case AMDGPUISD::BUFFER_STORE: return "BUFFER_STORE"; | |||
| 4452 | NODE_NAME_CASE(BUFFER_STORE_BYTE)case AMDGPUISD::BUFFER_STORE_BYTE: return "BUFFER_STORE_BYTE" ; | |||
| 4453 | NODE_NAME_CASE(BUFFER_STORE_SHORT)case AMDGPUISD::BUFFER_STORE_SHORT: return "BUFFER_STORE_SHORT" ; | |||
| 4454 | NODE_NAME_CASE(BUFFER_STORE_FORMAT)case AMDGPUISD::BUFFER_STORE_FORMAT: return "BUFFER_STORE_FORMAT" ; | |||
| 4455 | NODE_NAME_CASE(BUFFER_STORE_FORMAT_D16)case AMDGPUISD::BUFFER_STORE_FORMAT_D16: return "BUFFER_STORE_FORMAT_D16" ; | |||
| 4456 | NODE_NAME_CASE(BUFFER_ATOMIC_SWAP)case AMDGPUISD::BUFFER_ATOMIC_SWAP: return "BUFFER_ATOMIC_SWAP" ; | |||
| 4457 | NODE_NAME_CASE(BUFFER_ATOMIC_ADD)case AMDGPUISD::BUFFER_ATOMIC_ADD: return "BUFFER_ATOMIC_ADD" ; | |||
| 4458 | NODE_NAME_CASE(BUFFER_ATOMIC_SUB)case AMDGPUISD::BUFFER_ATOMIC_SUB: return "BUFFER_ATOMIC_SUB" ; | |||
| 4459 | NODE_NAME_CASE(BUFFER_ATOMIC_SMIN)case AMDGPUISD::BUFFER_ATOMIC_SMIN: return "BUFFER_ATOMIC_SMIN" ; | |||
| 4460 | NODE_NAME_CASE(BUFFER_ATOMIC_UMIN)case AMDGPUISD::BUFFER_ATOMIC_UMIN: return "BUFFER_ATOMIC_UMIN" ; | |||
| 4461 | NODE_NAME_CASE(BUFFER_ATOMIC_SMAX)case AMDGPUISD::BUFFER_ATOMIC_SMAX: return "BUFFER_ATOMIC_SMAX" ; | |||
| 4462 | NODE_NAME_CASE(BUFFER_ATOMIC_UMAX)case AMDGPUISD::BUFFER_ATOMIC_UMAX: return "BUFFER_ATOMIC_UMAX" ; | |||
| 4463 | NODE_NAME_CASE(BUFFER_ATOMIC_AND)case AMDGPUISD::BUFFER_ATOMIC_AND: return "BUFFER_ATOMIC_AND" ; | |||
| 4464 | NODE_NAME_CASE(BUFFER_ATOMIC_OR)case AMDGPUISD::BUFFER_ATOMIC_OR: return "BUFFER_ATOMIC_OR"; | |||
| 4465 | NODE_NAME_CASE(BUFFER_ATOMIC_XOR)case AMDGPUISD::BUFFER_ATOMIC_XOR: return "BUFFER_ATOMIC_XOR" ; | |||
| 4466 | NODE_NAME_CASE(BUFFER_ATOMIC_INC)case AMDGPUISD::BUFFER_ATOMIC_INC: return "BUFFER_ATOMIC_INC" ; | |||
| 4467 | NODE_NAME_CASE(BUFFER_ATOMIC_DEC)case AMDGPUISD::BUFFER_ATOMIC_DEC: return "BUFFER_ATOMIC_DEC" ; | |||
| 4468 | NODE_NAME_CASE(BUFFER_ATOMIC_CMPSWAP)case AMDGPUISD::BUFFER_ATOMIC_CMPSWAP: return "BUFFER_ATOMIC_CMPSWAP" ; | |||
| 4469 | NODE_NAME_CASE(BUFFER_ATOMIC_CSUB)case AMDGPUISD::BUFFER_ATOMIC_CSUB: return "BUFFER_ATOMIC_CSUB" ; | |||
| 4470 | NODE_NAME_CASE(BUFFER_ATOMIC_FADD)case AMDGPUISD::BUFFER_ATOMIC_FADD: return "BUFFER_ATOMIC_FADD" ; | |||
| 4471 | NODE_NAME_CASE(BUFFER_ATOMIC_FMIN)case AMDGPUISD::BUFFER_ATOMIC_FMIN: return "BUFFER_ATOMIC_FMIN" ; | |||
| 4472 | NODE_NAME_CASE(BUFFER_ATOMIC_FMAX)case AMDGPUISD::BUFFER_ATOMIC_FMAX: return "BUFFER_ATOMIC_FMAX" ; | |||
| 4473 | ||||
| 4474 | case AMDGPUISD::LAST_AMDGPU_ISD_NUMBER: break; | |||
| 4475 | } | |||
| 4476 | return nullptr; | |||
| 4477 | } | |||
| 4478 | ||||
| 4479 | SDValue AMDGPUTargetLowering::getSqrtEstimate(SDValue Operand, | |||
| 4480 | SelectionDAG &DAG, int Enabled, | |||
| 4481 | int &RefinementSteps, | |||
| 4482 | bool &UseOneConstNR, | |||
| 4483 | bool Reciprocal) const { | |||
| 4484 | EVT VT = Operand.getValueType(); | |||
| 4485 | ||||
| 4486 | if (VT == MVT::f32) { | |||
| 4487 | RefinementSteps = 0; | |||
| 4488 | return DAG.getNode(AMDGPUISD::RSQ, SDLoc(Operand), VT, Operand); | |||
| 4489 | } | |||
| 4490 | ||||
| 4491 | // TODO: There is also f64 rsq instruction, but the documentation is less | |||
| 4492 | // clear on its precision. | |||
| 4493 | ||||
| 4494 | return SDValue(); | |||
| 4495 | } | |||
| 4496 | ||||
| 4497 | SDValue AMDGPUTargetLowering::getRecipEstimate(SDValue Operand, | |||
| 4498 | SelectionDAG &DAG, int Enabled, | |||
| 4499 | int &RefinementSteps) const { | |||
| 4500 | EVT VT = Operand.getValueType(); | |||
| 4501 | ||||
| 4502 | if (VT == MVT::f32) { | |||
| 4503 | // Reciprocal, < 1 ulp error. | |||
| 4504 | // | |||
| 4505 | // This reciprocal approximation converges to < 0.5 ulp error with one | |||
| 4506 | // newton rhapson performed with two fused multiple adds (FMAs). | |||
| 4507 | ||||
| 4508 | RefinementSteps = 0; | |||
| 4509 | return DAG.getNode(AMDGPUISD::RCP, SDLoc(Operand), VT, Operand); | |||
| 4510 | } | |||
| 4511 | ||||
| 4512 | // TODO: There is also f64 rcp instruction, but the documentation is less | |||
| 4513 | // clear on its precision. | |||
| 4514 | ||||
| 4515 | return SDValue(); | |||
| 4516 | } | |||
| 4517 | ||||
| 4518 | void AMDGPUTargetLowering::computeKnownBitsForTargetNode( | |||
| 4519 | const SDValue Op, KnownBits &Known, | |||
| 4520 | const APInt &DemandedElts, const SelectionDAG &DAG, unsigned Depth) const { | |||
| 4521 | ||||
| 4522 | Known.resetAll(); // Don't know anything. | |||
| 4523 | ||||
| 4524 | unsigned Opc = Op.getOpcode(); | |||
| 4525 | ||||
| 4526 | switch (Opc) { | |||
| 4527 | default: | |||
| 4528 | break; | |||
| 4529 | case AMDGPUISD::CARRY: | |||
| 4530 | case AMDGPUISD::BORROW: { | |||
| 4531 | Known.Zero = APInt::getHighBitsSet(32, 31); | |||
| 4532 | break; | |||
| 4533 | } | |||
| 4534 | ||||
| 4535 | case AMDGPUISD::BFE_I32: | |||
| 4536 | case AMDGPUISD::BFE_U32: { | |||
| 4537 | ConstantSDNode *CWidth = dyn_cast<ConstantSDNode>(Op.getOperand(2)); | |||
| 4538 | if (!CWidth) | |||
| 4539 | return; | |||
| 4540 | ||||
| 4541 | uint32_t Width = CWidth->getZExtValue() & 0x1f; | |||
| 4542 | ||||
| 4543 | if (Opc == AMDGPUISD::BFE_U32) | |||
| 4544 | Known.Zero = APInt::getHighBitsSet(32, 32 - Width); | |||
| 4545 | ||||
| 4546 | break; | |||
| 4547 | } | |||
| 4548 | case AMDGPUISD::FP_TO_FP16: { | |||
| 4549 | unsigned BitWidth = Known.getBitWidth(); | |||
| 4550 | ||||
| 4551 | // High bits are zero. | |||
| 4552 | Known.Zero = APInt::getHighBitsSet(BitWidth, BitWidth - 16); | |||
| 4553 | break; | |||
| 4554 | } | |||
| 4555 | case AMDGPUISD::MUL_U24: | |||
| 4556 | case AMDGPUISD::MUL_I24: { | |||
| 4557 | KnownBits LHSKnown = DAG.computeKnownBits(Op.getOperand(0), Depth + 1); | |||
| 4558 | KnownBits RHSKnown = DAG.computeKnownBits(Op.getOperand(1), Depth + 1); | |||
| 4559 | unsigned TrailZ = LHSKnown.countMinTrailingZeros() + | |||
| 4560 | RHSKnown.countMinTrailingZeros(); | |||
| 4561 | Known.Zero.setLowBits(std::min(TrailZ, 32u)); | |||
| 4562 | // Skip extra check if all bits are known zeros. | |||
| 4563 | if (TrailZ >= 32) | |||
| 4564 | break; | |||
| 4565 | ||||
| 4566 | // Truncate to 24 bits. | |||
| 4567 | LHSKnown = LHSKnown.trunc(24); | |||
| 4568 | RHSKnown = RHSKnown.trunc(24); | |||
| 4569 | ||||
| 4570 | if (Opc == AMDGPUISD::MUL_I24) { | |||
| 4571 | unsigned LHSValBits = 24 - LHSKnown.countMinSignBits(); | |||
| 4572 | unsigned RHSValBits = 24 - RHSKnown.countMinSignBits(); | |||
| 4573 | unsigned MaxValBits = std::min(LHSValBits + RHSValBits, 32u); | |||
| 4574 | if (MaxValBits >= 32) | |||
| 4575 | break; | |||
| 4576 | bool LHSNegative = LHSKnown.isNegative(); | |||
| 4577 | bool LHSNonNegative = LHSKnown.isNonNegative(); | |||
| 4578 | bool LHSPositive = LHSKnown.isStrictlyPositive(); | |||
| 4579 | bool RHSNegative = RHSKnown.isNegative(); | |||
| 4580 | bool RHSNonNegative = RHSKnown.isNonNegative(); | |||
| 4581 | bool RHSPositive = RHSKnown.isStrictlyPositive(); | |||
| 4582 | ||||
| 4583 | if ((LHSNonNegative && RHSNonNegative) || (LHSNegative && RHSNegative)) | |||
| 4584 | Known.Zero.setHighBits(32 - MaxValBits); | |||
| 4585 | else if ((LHSNegative && RHSPositive) || (LHSPositive && RHSNegative)) | |||
| 4586 | Known.One.setHighBits(32 - MaxValBits); | |||
| 4587 | } else { | |||
| 4588 | unsigned LHSValBits = 24 - LHSKnown.countMinLeadingZeros(); | |||
| 4589 | unsigned RHSValBits = 24 - RHSKnown.countMinLeadingZeros(); | |||
| 4590 | unsigned MaxValBits = std::min(LHSValBits + RHSValBits, 32u); | |||
| 4591 | if (MaxValBits >= 32) | |||
| 4592 | break; | |||
| 4593 | Known.Zero.setHighBits(32 - MaxValBits); | |||
| 4594 | } | |||
| 4595 | break; | |||
| 4596 | } | |||
| 4597 | case AMDGPUISD::PERM: { | |||
| 4598 | ConstantSDNode *CMask = dyn_cast<ConstantSDNode>(Op.getOperand(2)); | |||
| 4599 | if (!CMask) | |||
| 4600 | return; | |||
| 4601 | ||||
| 4602 | KnownBits LHSKnown = DAG.computeKnownBits(Op.getOperand(0), Depth + 1); | |||
| 4603 | KnownBits RHSKnown = DAG.computeKnownBits(Op.getOperand(1), Depth + 1); | |||
| 4604 | unsigned Sel = CMask->getZExtValue(); | |||
| 4605 | ||||
| 4606 | for (unsigned I = 0; I < 32; I += 8) { | |||
| 4607 | unsigned SelBits = Sel & 0xff; | |||
| 4608 | if (SelBits < 4) { | |||
| 4609 | SelBits *= 8; | |||
| 4610 | Known.One |= ((RHSKnown.One.getZExtValue() >> SelBits) & 0xff) << I; | |||
| 4611 | Known.Zero |= ((RHSKnown.Zero.getZExtValue() >> SelBits) & 0xff) << I; | |||
| 4612 | } else if (SelBits < 7) { | |||
| 4613 | SelBits = (SelBits & 3) * 8; | |||
| 4614 | Known.One |= ((LHSKnown.One.getZExtValue() >> SelBits) & 0xff) << I; | |||
| 4615 | Known.Zero |= ((LHSKnown.Zero.getZExtValue() >> SelBits) & 0xff) << I; | |||
| 4616 | } else if (SelBits == 0x0c) { | |||
| 4617 | Known.Zero |= 0xFFull << I; | |||
| 4618 | } else if (SelBits > 0x0c) { | |||
| 4619 | Known.One |= 0xFFull << I; | |||
| 4620 | } | |||
| 4621 | Sel >>= 8; | |||
| 4622 | } | |||
| 4623 | break; | |||
| 4624 | } | |||
| 4625 | case AMDGPUISD::BUFFER_LOAD_UBYTE: { | |||
| 4626 | Known.Zero.setHighBits(24); | |||
| 4627 | break; | |||
| 4628 | } | |||
| 4629 | case AMDGPUISD::BUFFER_LOAD_USHORT: { | |||
| 4630 | Known.Zero.setHighBits(16); | |||
| 4631 | break; | |||
| 4632 | } | |||
| 4633 | case AMDGPUISD::LDS: { | |||
| 4634 | auto GA = cast<GlobalAddressSDNode>(Op.getOperand(0).getNode()); | |||
| 4635 | Align Alignment = GA->getGlobal()->getPointerAlignment(DAG.getDataLayout()); | |||
| 4636 | ||||
| 4637 | Known.Zero.setHighBits(16); | |||
| 4638 | Known.Zero.setLowBits(Log2(Alignment)); | |||
| 4639 | break; | |||
| 4640 | } | |||
| 4641 | case ISD::INTRINSIC_WO_CHAIN: { | |||
| 4642 | unsigned IID = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue(); | |||
| 4643 | switch (IID) { | |||
| 4644 | case Intrinsic::amdgcn_mbcnt_lo: | |||
| 4645 | case Intrinsic::amdgcn_mbcnt_hi: { | |||
| 4646 | const GCNSubtarget &ST = | |||
| 4647 | DAG.getMachineFunction().getSubtarget<GCNSubtarget>(); | |||
| 4648 | // These return at most the wavefront size - 1. | |||
| 4649 | unsigned Size = Op.getValueType().getSizeInBits(); | |||
| 4650 | Known.Zero.setHighBits(Size - ST.getWavefrontSizeLog2()); | |||
| 4651 | break; | |||
| 4652 | } | |||
| 4653 | default: | |||
| 4654 | break; | |||
| 4655 | } | |||
| 4656 | } | |||
| 4657 | } | |||
| 4658 | } | |||
| 4659 | ||||
| 4660 | unsigned AMDGPUTargetLowering::ComputeNumSignBitsForTargetNode( | |||
| 4661 | SDValue Op, const APInt &DemandedElts, const SelectionDAG &DAG, | |||
| 4662 | unsigned Depth) const { | |||
| 4663 | switch (Op.getOpcode()) { | |||
| 4664 | case AMDGPUISD::BFE_I32: { | |||
| 4665 | ConstantSDNode *Width = dyn_cast<ConstantSDNode>(Op.getOperand(2)); | |||
| 4666 | if (!Width) | |||
| 4667 | return 1; | |||
| 4668 | ||||
| 4669 | unsigned SignBits = 32 - Width->getZExtValue() + 1; | |||
| 4670 | if (!isNullConstant(Op.getOperand(1))) | |||
| 4671 | return SignBits; | |||
| 4672 | ||||
| 4673 | // TODO: Could probably figure something out with non-0 offsets. | |||
| 4674 | unsigned Op0SignBits = DAG.ComputeNumSignBits(Op.getOperand(0), Depth + 1); | |||
| 4675 | return std::max(SignBits, Op0SignBits); | |||
| 4676 | } | |||
| 4677 | ||||
| 4678 | case AMDGPUISD::BFE_U32: { | |||
| 4679 | ConstantSDNode *Width = dyn_cast<ConstantSDNode>(Op.getOperand(2)); | |||
| 4680 | return Width ? 32 - (Width->getZExtValue() & 0x1f) : 1; | |||
| 4681 | } | |||
| 4682 | ||||
| 4683 | case AMDGPUISD::CARRY: | |||
| 4684 | case AMDGPUISD::BORROW: | |||
| 4685 | return 31; | |||
| 4686 | case AMDGPUISD::BUFFER_LOAD_BYTE: | |||
| 4687 | return 25; | |||
| 4688 | case AMDGPUISD::BUFFER_LOAD_SHORT: | |||
| 4689 | return 17; | |||
| 4690 | case AMDGPUISD::BUFFER_LOAD_UBYTE: | |||
| 4691 | return 24; | |||
| 4692 | case AMDGPUISD::BUFFER_LOAD_USHORT: | |||
| 4693 | return 16; | |||
| 4694 | case AMDGPUISD::FP_TO_FP16: | |||
| 4695 | return 16; | |||
| 4696 | default: | |||
| 4697 | return 1; | |||
| 4698 | } | |||
| 4699 | } | |||
| 4700 | ||||
| 4701 | unsigned AMDGPUTargetLowering::computeNumSignBitsForTargetInstr( | |||
| 4702 | GISelKnownBits &Analysis, Register R, | |||
| 4703 | const APInt &DemandedElts, const MachineRegisterInfo &MRI, | |||
| 4704 | unsigned Depth) const { | |||
| 4705 | const MachineInstr *MI = MRI.getVRegDef(R); | |||
| 4706 | if (!MI) | |||
| 4707 | return 1; | |||
| 4708 | ||||
| 4709 | // TODO: Check range metadata on MMO. | |||
| 4710 | switch (MI->getOpcode()) { | |||
| 4711 | case AMDGPU::G_AMDGPU_BUFFER_LOAD_SBYTE: | |||
| 4712 | return 25; | |||
| 4713 | case AMDGPU::G_AMDGPU_BUFFER_LOAD_SSHORT: | |||
| 4714 | return 17; | |||
| 4715 | case AMDGPU::G_AMDGPU_BUFFER_LOAD_UBYTE: | |||
| 4716 | return 24; | |||
| 4717 | case AMDGPU::G_AMDGPU_BUFFER_LOAD_USHORT: | |||
| 4718 | return 16; | |||
| 4719 | default: | |||
| 4720 | return 1; | |||
| 4721 | } | |||
| 4722 | } | |||
| 4723 | ||||
| 4724 | bool AMDGPUTargetLowering::isKnownNeverNaNForTargetNode(SDValue Op, | |||
| 4725 | const SelectionDAG &DAG, | |||
| 4726 | bool SNaN, | |||
| 4727 | unsigned Depth) const { | |||
| 4728 | unsigned Opcode = Op.getOpcode(); | |||
| 4729 | switch (Opcode) { | |||
| 4730 | case AMDGPUISD::FMIN_LEGACY: | |||
| 4731 | case AMDGPUISD::FMAX_LEGACY: { | |||
| 4732 | if (SNaN) | |||
| 4733 | return true; | |||
| 4734 | ||||
| 4735 | // TODO: Can check no nans on one of the operands for each one, but which | |||
| 4736 | // one? | |||
| 4737 | return false; | |||
| 4738 | } | |||
| 4739 | case AMDGPUISD::FMUL_LEGACY: | |||
| 4740 | case AMDGPUISD::CVT_PKRTZ_F16_F32: { | |||
| 4741 | if (SNaN) | |||
| 4742 | return true; | |||
| 4743 | return DAG.isKnownNeverNaN(Op.getOperand(0), SNaN, Depth + 1) && | |||
| 4744 | DAG.isKnownNeverNaN(Op.getOperand(1), SNaN, Depth + 1); | |||
| 4745 | } | |||
| 4746 | case AMDGPUISD::FMED3: | |||
| 4747 | case AMDGPUISD::FMIN3: | |||
| 4748 | case AMDGPUISD::FMAX3: | |||
| 4749 | case AMDGPUISD::FMAD_FTZ: { | |||
| 4750 | if (SNaN) | |||
| 4751 | return true; | |||
| 4752 | return DAG.isKnownNeverNaN(Op.getOperand(0), SNaN, Depth + 1) && | |||
| 4753 | DAG.isKnownNeverNaN(Op.getOperand(1), SNaN, Depth + 1) && | |||
| 4754 | DAG.isKnownNeverNaN(Op.getOperand(2), SNaN, Depth + 1); | |||
| 4755 | } | |||
| 4756 | case AMDGPUISD::CVT_F32_UBYTE0: | |||
| 4757 | case AMDGPUISD::CVT_F32_UBYTE1: | |||
| 4758 | case AMDGPUISD::CVT_F32_UBYTE2: | |||
| 4759 | case AMDGPUISD::CVT_F32_UBYTE3: | |||
| 4760 | return true; | |||
| 4761 | ||||
| 4762 | case AMDGPUISD::RCP: | |||
| 4763 | case AMDGPUISD::RSQ: | |||
| 4764 | case AMDGPUISD::RCP_LEGACY: | |||
| 4765 | case AMDGPUISD::RSQ_CLAMP: { | |||
| 4766 | if (SNaN) | |||
| 4767 | return true; | |||
| 4768 | ||||
| 4769 | // TODO: Need is known positive check. | |||
| 4770 | return false; | |||
| 4771 | } | |||
| 4772 | case AMDGPUISD::LDEXP: | |||
| 4773 | case AMDGPUISD::FRACT: { | |||
| 4774 | if (SNaN) | |||
| 4775 | return true; | |||
| 4776 | return DAG.isKnownNeverNaN(Op.getOperand(0), SNaN, Depth + 1); | |||
| 4777 | } | |||
| 4778 | case AMDGPUISD::DIV_SCALE: | |||
| 4779 | case AMDGPUISD::DIV_FMAS: | |||
| 4780 | case AMDGPUISD::DIV_FIXUP: | |||
| 4781 | // TODO: Refine on operands. | |||
| 4782 | return SNaN; | |||
| 4783 | case AMDGPUISD::SIN_HW: | |||
| 4784 | case AMDGPUISD::COS_HW: { | |||
| 4785 | // TODO: Need check for infinity | |||
| 4786 | return SNaN; | |||
| 4787 | } | |||
| 4788 | case ISD::INTRINSIC_WO_CHAIN: { | |||
| 4789 | unsigned IntrinsicID | |||
| 4790 | = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue(); | |||
| 4791 | // TODO: Handle more intrinsics | |||
| 4792 | switch (IntrinsicID) { | |||
| 4793 | case Intrinsic::amdgcn_cubeid: | |||
| 4794 | return true; | |||
| 4795 | ||||
| 4796 | case Intrinsic::amdgcn_frexp_mant: { | |||
| 4797 | if (SNaN) | |||
| 4798 | return true; | |||
| 4799 | return DAG.isKnownNeverNaN(Op.getOperand(1), SNaN, Depth + 1); | |||
| 4800 | } | |||
| 4801 | case Intrinsic::amdgcn_cvt_pkrtz: { | |||
| 4802 | if (SNaN) | |||
| 4803 | return true; | |||
| 4804 | return DAG.isKnownNeverNaN(Op.getOperand(1), SNaN, Depth + 1) && | |||
| 4805 | DAG.isKnownNeverNaN(Op.getOperand(2), SNaN, Depth + 1); | |||
| 4806 | } | |||
| 4807 | case Intrinsic::amdgcn_rcp: | |||
| 4808 | case Intrinsic::amdgcn_rsq: | |||
| 4809 | case Intrinsic::amdgcn_rcp_legacy: | |||
| 4810 | case Intrinsic::amdgcn_rsq_legacy: | |||
| 4811 | case Intrinsic::amdgcn_rsq_clamp: { | |||
| 4812 | if (SNaN) | |||
| 4813 | return true; | |||
| 4814 | ||||
| 4815 | // TODO: Need is known positive check. | |||
| 4816 | return false; | |||
| 4817 | } | |||
| 4818 | case Intrinsic::amdgcn_trig_preop: | |||
| 4819 | case Intrinsic::amdgcn_fdot2: | |||
| 4820 | // TODO: Refine on operand | |||
| 4821 | return SNaN; | |||
| 4822 | case Intrinsic::amdgcn_fma_legacy: | |||
| 4823 | if (SNaN) | |||
| 4824 | return true; | |||
| 4825 | return DAG.isKnownNeverNaN(Op.getOperand(1), SNaN, Depth + 1) && | |||
| 4826 | DAG.isKnownNeverNaN(Op.getOperand(2), SNaN, Depth + 1) && | |||
| 4827 | DAG.isKnownNeverNaN(Op.getOperand(3), SNaN, Depth + 1); | |||
| 4828 | default: | |||
| 4829 | return false; | |||
| 4830 | } | |||
| 4831 | } | |||
| 4832 | default: | |||
| 4833 | return false; | |||
| 4834 | } | |||
| 4835 | } | |||
| 4836 | ||||
| 4837 | TargetLowering::AtomicExpansionKind | |||
| 4838 | AMDGPUTargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *RMW) const { | |||
| 4839 | switch (RMW->getOperation()) { | |||
| 4840 | case AtomicRMWInst::Nand: | |||
| 4841 | case AtomicRMWInst::FAdd: | |||
| 4842 | case AtomicRMWInst::FSub: | |||
| 4843 | return AtomicExpansionKind::CmpXChg; | |||
| 4844 | default: | |||
| 4845 | return AtomicExpansionKind::None; | |||
| 4846 | } | |||
| 4847 | } | |||
| 4848 | ||||
| 4849 | bool AMDGPUTargetLowering::isConstantUnsignedBitfieldExtactLegal( | |||
| 4850 | unsigned Opc, LLT Ty1, LLT Ty2) const { | |||
| 4851 | return Ty1 == Ty2 && (Ty1 == LLT::scalar(32) || Ty1 == LLT::scalar(64)); | |||
| 4852 | } |
| 1 | //===- llvm/Support/Casting.h - Allow flexible, checked, casts --*- 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 defines the isa<X>(), cast<X>(), dyn_cast<X>(), cast_or_null<X>(), |
| 10 | // and dyn_cast_or_null<X>() templates. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_SUPPORT_CASTING_H |
| 15 | #define LLVM_SUPPORT_CASTING_H |
| 16 | |
| 17 | #include "llvm/Support/Compiler.h" |
| 18 | #include "llvm/Support/type_traits.h" |
| 19 | #include <cassert> |
| 20 | #include <memory> |
| 21 | #include <type_traits> |
| 22 | |
| 23 | namespace llvm { |
| 24 | |
| 25 | //===----------------------------------------------------------------------===// |
| 26 | // isa<x> Support Templates |
| 27 | //===----------------------------------------------------------------------===// |
| 28 | |
| 29 | // Define a template that can be specialized by smart pointers to reflect the |
| 30 | // fact that they are automatically dereferenced, and are not involved with the |
| 31 | // template selection process... the default implementation is a noop. |
| 32 | // |
| 33 | template<typename From> struct simplify_type { |
| 34 | using SimpleType = From; // The real type this represents... |
| 35 | |
| 36 | // An accessor to get the real value... |
| 37 | static SimpleType &getSimplifiedValue(From &Val) { return Val; } |
| 38 | }; |
| 39 | |
| 40 | template<typename From> struct simplify_type<const From> { |
| 41 | using NonConstSimpleType = typename simplify_type<From>::SimpleType; |
| 42 | using SimpleType = |
| 43 | typename add_const_past_pointer<NonConstSimpleType>::type; |
| 44 | using RetType = |
| 45 | typename add_lvalue_reference_if_not_pointer<SimpleType>::type; |
| 46 | |
| 47 | static RetType getSimplifiedValue(const From& Val) { |
| 48 | return simplify_type<From>::getSimplifiedValue(const_cast<From&>(Val)); |
| 49 | } |
| 50 | }; |
| 51 | |
| 52 | // The core of the implementation of isa<X> is here; To and From should be |
| 53 | // the names of classes. This template can be specialized to customize the |
| 54 | // implementation of isa<> without rewriting it from scratch. |
| 55 | template <typename To, typename From, typename Enabler = void> |
| 56 | struct isa_impl { |
| 57 | static inline bool doit(const From &Val) { |
| 58 | return To::classof(&Val); |
| 59 | } |
| 60 | }; |
| 61 | |
| 62 | /// Always allow upcasts, and perform no dynamic check for them. |
| 63 | template <typename To, typename From> |
| 64 | struct isa_impl<To, From, std::enable_if_t<std::is_base_of<To, From>::value>> { |
| 65 | static inline bool doit(const From &) { return true; } |
| 66 | }; |
| 67 | |
| 68 | template <typename To, typename From> struct isa_impl_cl { |
| 69 | static inline bool doit(const From &Val) { |
| 70 | return isa_impl<To, From>::doit(Val); |
| 71 | } |
| 72 | }; |
| 73 | |
| 74 | template <typename To, typename From> struct isa_impl_cl<To, const From> { |
| 75 | static inline bool doit(const From &Val) { |
| 76 | return isa_impl<To, From>::doit(Val); |
| 77 | } |
| 78 | }; |
| 79 | |
| 80 | template <typename To, typename From> |
| 81 | struct isa_impl_cl<To, const std::unique_ptr<From>> { |
| 82 | static inline bool doit(const std::unique_ptr<From> &Val) { |
| 83 | assert(Val && "isa<> used on a null pointer")((void)0); |
| 84 | return isa_impl_cl<To, From>::doit(*Val); |
| 85 | } |
| 86 | }; |
| 87 | |
| 88 | template <typename To, typename From> struct isa_impl_cl<To, From*> { |
| 89 | static inline bool doit(const From *Val) { |
| 90 | assert(Val && "isa<> used on a null pointer")((void)0); |
| 91 | return isa_impl<To, From>::doit(*Val); |
| 92 | } |
| 93 | }; |
| 94 | |
| 95 | template <typename To, typename From> struct isa_impl_cl<To, From*const> { |
| 96 | static inline bool doit(const From *Val) { |
| 97 | assert(Val && "isa<> used on a null pointer")((void)0); |
| 98 | return isa_impl<To, From>::doit(*Val); |
| 99 | } |
| 100 | }; |
| 101 | |
| 102 | template <typename To, typename From> struct isa_impl_cl<To, const From*> { |
| 103 | static inline bool doit(const From *Val) { |
| 104 | assert(Val && "isa<> used on a null pointer")((void)0); |
| 105 | return isa_impl<To, From>::doit(*Val); |
| 106 | } |
| 107 | }; |
| 108 | |
| 109 | template <typename To, typename From> struct isa_impl_cl<To, const From*const> { |
| 110 | static inline bool doit(const From *Val) { |
| 111 | assert(Val && "isa<> used on a null pointer")((void)0); |
| 112 | return isa_impl<To, From>::doit(*Val); |
| 113 | } |
| 114 | }; |
| 115 | |
| 116 | template<typename To, typename From, typename SimpleFrom> |
| 117 | struct isa_impl_wrap { |
| 118 | // When From != SimplifiedType, we can simplify the type some more by using |
| 119 | // the simplify_type template. |
| 120 | static bool doit(const From &Val) { |
| 121 | return isa_impl_wrap<To, SimpleFrom, |
| 122 | typename simplify_type<SimpleFrom>::SimpleType>::doit( |
| 123 | simplify_type<const From>::getSimplifiedValue(Val)); |
| 124 | } |
| 125 | }; |
| 126 | |
| 127 | template<typename To, typename FromTy> |
| 128 | struct isa_impl_wrap<To, FromTy, FromTy> { |
| 129 | // When From == SimpleType, we are as simple as we are going to get. |
| 130 | static bool doit(const FromTy &Val) { |
| 131 | return isa_impl_cl<To,FromTy>::doit(Val); |
| 132 | } |
| 133 | }; |
| 134 | |
| 135 | // isa<X> - Return true if the parameter to the template is an instance of one |
| 136 | // of the template type arguments. Used like this: |
| 137 | // |
| 138 | // if (isa<Type>(myVal)) { ... } |
| 139 | // if (isa<Type0, Type1, Type2>(myVal)) { ... } |
| 140 | // |
| 141 | template <class X, class Y> LLVM_NODISCARD[[clang::warn_unused_result]] inline bool isa(const Y &Val) { |
| 142 | return isa_impl_wrap<X, const Y, |
| 143 | typename simplify_type<const Y>::SimpleType>::doit(Val); |
| 144 | } |
| 145 | |
| 146 | template <typename First, typename Second, typename... Rest, typename Y> |
| 147 | LLVM_NODISCARD[[clang::warn_unused_result]] inline bool isa(const Y &Val) { |
| 148 | return isa<First>(Val) || isa<Second, Rest...>(Val); |
| 149 | } |
| 150 | |
| 151 | // isa_and_nonnull<X> - Functionally identical to isa, except that a null value |
| 152 | // is accepted. |
| 153 | // |
| 154 | template <typename... X, class Y> |
| 155 | LLVM_NODISCARD[[clang::warn_unused_result]] inline bool isa_and_nonnull(const Y &Val) { |
| 156 | if (!Val) |
| 157 | return false; |
| 158 | return isa<X...>(Val); |
| 159 | } |
| 160 | |
| 161 | //===----------------------------------------------------------------------===// |
| 162 | // cast<x> Support Templates |
| 163 | //===----------------------------------------------------------------------===// |
| 164 | |
| 165 | template<class To, class From> struct cast_retty; |
| 166 | |
| 167 | // Calculate what type the 'cast' function should return, based on a requested |
| 168 | // type of To and a source type of From. |
| 169 | template<class To, class From> struct cast_retty_impl { |
| 170 | using ret_type = To &; // Normal case, return Ty& |
| 171 | }; |
| 172 | template<class To, class From> struct cast_retty_impl<To, const From> { |
| 173 | using ret_type = const To &; // Normal case, return Ty& |
| 174 | }; |
| 175 | |
| 176 | template<class To, class From> struct cast_retty_impl<To, From*> { |
| 177 | using ret_type = To *; // Pointer arg case, return Ty* |
| 178 | }; |
| 179 | |
| 180 | template<class To, class From> struct cast_retty_impl<To, const From*> { |
| 181 | using ret_type = const To *; // Constant pointer arg case, return const Ty* |
| 182 | }; |
| 183 | |
| 184 | template<class To, class From> struct cast_retty_impl<To, const From*const> { |
| 185 | using ret_type = const To *; // Constant pointer arg case, return const Ty* |
| 186 | }; |
| 187 | |
| 188 | template <class To, class From> |
| 189 | struct cast_retty_impl<To, std::unique_ptr<From>> { |
| 190 | private: |
| 191 | using PointerType = typename cast_retty_impl<To, From *>::ret_type; |
| 192 | using ResultType = std::remove_pointer_t<PointerType>; |
| 193 | |
| 194 | public: |
| 195 | using ret_type = std::unique_ptr<ResultType>; |
| 196 | }; |
| 197 | |
| 198 | template<class To, class From, class SimpleFrom> |
| 199 | struct cast_retty_wrap { |
| 200 | // When the simplified type and the from type are not the same, use the type |
| 201 | // simplifier to reduce the type, then reuse cast_retty_impl to get the |
| 202 | // resultant type. |
| 203 | using ret_type = typename cast_retty<To, SimpleFrom>::ret_type; |
| 204 | }; |
| 205 | |
| 206 | template<class To, class FromTy> |
| 207 | struct cast_retty_wrap<To, FromTy, FromTy> { |
| 208 | // When the simplified type is equal to the from type, use it directly. |
| 209 | using ret_type = typename cast_retty_impl<To,FromTy>::ret_type; |
| 210 | }; |
| 211 | |
| 212 | template<class To, class From> |
| 213 | struct cast_retty { |
| 214 | using ret_type = typename cast_retty_wrap< |
| 215 | To, From, typename simplify_type<From>::SimpleType>::ret_type; |
| 216 | }; |
| 217 | |
| 218 | // Ensure the non-simple values are converted using the simplify_type template |
| 219 | // that may be specialized by smart pointers... |
| 220 | // |
| 221 | template<class To, class From, class SimpleFrom> struct cast_convert_val { |
| 222 | // This is not a simple type, use the template to simplify it... |
| 223 | static typename cast_retty<To, From>::ret_type doit(From &Val) { |
| 224 | return cast_convert_val<To, SimpleFrom, |
| 225 | typename simplify_type<SimpleFrom>::SimpleType>::doit( |
| 226 | simplify_type<From>::getSimplifiedValue(Val)); |
| 227 | } |
| 228 | }; |
| 229 | |
| 230 | template<class To, class FromTy> struct cast_convert_val<To,FromTy,FromTy> { |
| 231 | // This _is_ a simple type, just cast it. |
| 232 | static typename cast_retty<To, FromTy>::ret_type doit(const FromTy &Val) { |
| 233 | typename cast_retty<To, FromTy>::ret_type Res2 |
| 234 | = (typename cast_retty<To, FromTy>::ret_type)const_cast<FromTy&>(Val); |
| 235 | return Res2; |
| 236 | } |
| 237 | }; |
| 238 | |
| 239 | template <class X> struct is_simple_type { |
| 240 | static const bool value = |
| 241 | std::is_same<X, typename simplify_type<X>::SimpleType>::value; |
| 242 | }; |
| 243 | |
| 244 | // cast<X> - Return the argument parameter cast to the specified type. This |
| 245 | // casting operator asserts that the type is correct, so it does not return null |
| 246 | // on failure. It does not allow a null argument (use cast_or_null for that). |
| 247 | // It is typically used like this: |
| 248 | // |
| 249 | // cast<Instruction>(myVal)->getParent() |
| 250 | // |
| 251 | template <class X, class Y> |
| 252 | inline std::enable_if_t<!is_simple_type<Y>::value, |
| 253 | typename cast_retty<X, const Y>::ret_type> |
| 254 | cast(const Y &Val) { |
| 255 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")((void)0); |
| 256 | return cast_convert_val< |
| 257 | X, const Y, typename simplify_type<const Y>::SimpleType>::doit(Val); |
| 258 | } |
| 259 | |
| 260 | template <class X, class Y> |
| 261 | inline typename cast_retty<X, Y>::ret_type cast(Y &Val) { |
| 262 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")((void)0); |
| 263 | return cast_convert_val<X, Y, |
| 264 | typename simplify_type<Y>::SimpleType>::doit(Val); |
| 265 | } |
| 266 | |
| 267 | template <class X, class Y> |
| 268 | inline typename cast_retty<X, Y *>::ret_type cast(Y *Val) { |
| 269 | assert(isa<X>(Val) && "cast<Ty>() argument of incompatible type!")((void)0); |
| 270 | return cast_convert_val<X, Y*, |
| 271 | typename simplify_type<Y*>::SimpleType>::doit(Val); |
| 272 | } |
| 273 | |
| 274 | template <class X, class Y> |
| 275 | inline typename cast_retty<X, std::unique_ptr<Y>>::ret_type |
| 276 | cast(std::unique_ptr<Y> &&Val) { |
| 277 | assert(isa<X>(Val.get()) && "cast<Ty>() argument of incompatible type!")((void)0); |
| 278 | using ret_type = typename cast_retty<X, std::unique_ptr<Y>>::ret_type; |
| 279 | return ret_type( |
| 280 | cast_convert_val<X, Y *, typename simplify_type<Y *>::SimpleType>::doit( |
| 281 | Val.release())); |
| 282 | } |
| 283 | |
| 284 | // cast_or_null<X> - Functionally identical to cast, except that a null value is |
| 285 | // accepted. |
| 286 | // |
| 287 | template <class X, class Y> |
| 288 | LLVM_NODISCARD[[clang::warn_unused_result]] inline std::enable_if_t< |
| 289 | !is_simple_type<Y>::value, typename cast_retty<X, const Y>::ret_type> |
| 290 | cast_or_null(const Y &Val) { |
| 291 | if (!Val) |
| 292 | return nullptr; |
| 293 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")((void)0); |
| 294 | return cast<X>(Val); |
| 295 | } |
| 296 | |
| 297 | template <class X, class Y> |
| 298 | LLVM_NODISCARD[[clang::warn_unused_result]] inline std::enable_if_t<!is_simple_type<Y>::value, |
| 299 | typename cast_retty<X, Y>::ret_type> |
| 300 | cast_or_null(Y &Val) { |
| 301 | if (!Val) |
| 302 | return nullptr; |
| 303 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")((void)0); |
| 304 | return cast<X>(Val); |
| 305 | } |
| 306 | |
| 307 | template <class X, class Y> |
| 308 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type |
| 309 | cast_or_null(Y *Val) { |
| 310 | if (!Val) return nullptr; |
| 311 | assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!")((void)0); |
| 312 | return cast<X>(Val); |
| 313 | } |
| 314 | |
| 315 | template <class X, class Y> |
| 316 | inline typename cast_retty<X, std::unique_ptr<Y>>::ret_type |
| 317 | cast_or_null(std::unique_ptr<Y> &&Val) { |
| 318 | if (!Val) |
| 319 | return nullptr; |
| 320 | return cast<X>(std::move(Val)); |
| 321 | } |
| 322 | |
| 323 | // dyn_cast<X> - Return the argument parameter cast to the specified type. This |
| 324 | // casting operator returns null if the argument is of the wrong type, so it can |
| 325 | // be used to test for a type as well as cast if successful. This should be |
| 326 | // used in the context of an if statement like this: |
| 327 | // |
| 328 | // if (const Instruction *I = dyn_cast<Instruction>(myVal)) { ... } |
| 329 | // |
| 330 | |
| 331 | template <class X, class Y> |
| 332 | LLVM_NODISCARD[[clang::warn_unused_result]] inline std::enable_if_t< |
| 333 | !is_simple_type<Y>::value, typename cast_retty<X, const Y>::ret_type> |
| 334 | dyn_cast(const Y &Val) { |
| 335 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
| 336 | } |
| 337 | |
| 338 | template <class X, class Y> |
| 339 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y>::ret_type dyn_cast(Y &Val) { |
| 340 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
| 341 | } |
| 342 | |
| 343 | template <class X, class Y> |
| 344 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type dyn_cast(Y *Val) { |
| 345 | return isa<X>(Val) ? cast<X>(Val) : nullptr; |
| 346 | } |
| 347 | |
| 348 | // dyn_cast_or_null<X> - Functionally identical to dyn_cast, except that a null |
| 349 | // value is accepted. |
| 350 | // |
| 351 | template <class X, class Y> |
| 352 | LLVM_NODISCARD[[clang::warn_unused_result]] inline std::enable_if_t< |
| 353 | !is_simple_type<Y>::value, typename cast_retty<X, const Y>::ret_type> |
| 354 | dyn_cast_or_null(const Y &Val) { |
| 355 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
| 356 | } |
| 357 | |
| 358 | template <class X, class Y> |
| 359 | LLVM_NODISCARD[[clang::warn_unused_result]] inline std::enable_if_t<!is_simple_type<Y>::value, |
| 360 | typename cast_retty<X, Y>::ret_type> |
| 361 | dyn_cast_or_null(Y &Val) { |
| 362 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
| 363 | } |
| 364 | |
| 365 | template <class X, class Y> |
| 366 | LLVM_NODISCARD[[clang::warn_unused_result]] inline typename cast_retty<X, Y *>::ret_type |
| 367 | dyn_cast_or_null(Y *Val) { |
| 368 | return (Val && isa<X>(Val)) ? cast<X>(Val) : nullptr; |
| 369 | } |
| 370 | |
| 371 | // unique_dyn_cast<X> - Given a unique_ptr<Y>, try to return a unique_ptr<X>, |
| 372 | // taking ownership of the input pointer iff isa<X>(Val) is true. If the |
| 373 | // cast is successful, From refers to nullptr on exit and the casted value |
| 374 | // is returned. If the cast is unsuccessful, the function returns nullptr |
| 375 | // and From is unchanged. |
| 376 | template <class X, class Y> |
| 377 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast(std::unique_ptr<Y> &Val) |
| 378 | -> decltype(cast<X>(Val)) { |
| 379 | if (!isa<X>(Val)) |
| 380 | return nullptr; |
| 381 | return cast<X>(std::move(Val)); |
| 382 | } |
| 383 | |
| 384 | template <class X, class Y> |
| 385 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast(std::unique_ptr<Y> &&Val) { |
| 386 | return unique_dyn_cast<X, Y>(Val); |
| 387 | } |
| 388 | |
| 389 | // dyn_cast_or_null<X> - Functionally identical to unique_dyn_cast, except that |
| 390 | // a null value is accepted. |
| 391 | template <class X, class Y> |
| 392 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast_or_null(std::unique_ptr<Y> &Val) |
| 393 | -> decltype(cast<X>(Val)) { |
| 394 | if (!Val) |
| 395 | return nullptr; |
| 396 | return unique_dyn_cast<X, Y>(Val); |
| 397 | } |
| 398 | |
| 399 | template <class X, class Y> |
| 400 | LLVM_NODISCARD[[clang::warn_unused_result]] inline auto unique_dyn_cast_or_null(std::unique_ptr<Y> &&Val) { |
| 401 | return unique_dyn_cast_or_null<X, Y>(Val); |
| 402 | } |
| 403 | |
| 404 | } // end namespace llvm |
| 405 | |
| 406 | #endif // LLVM_SUPPORT_CASTING_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 | |
| 57 | namespace llvm { |
| 58 | |
| 59 | class APInt; |
| 60 | class Constant; |
| 61 | template <typename T> struct DenseMapInfo; |
| 62 | class GlobalValue; |
| 63 | class MachineBasicBlock; |
| 64 | class MachineConstantPoolValue; |
| 65 | class MCSymbol; |
| 66 | class raw_ostream; |
| 67 | class SDNode; |
| 68 | class SelectionDAG; |
| 69 | class Type; |
| 70 | class Value; |
| 71 | |
| 72 | void 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 | /// |
| 79 | struct SDVTList { |
| 80 | const EVT *VTs; |
| 81 | unsigned int NumVTs; |
| 82 | }; |
| 83 | |
| 84 | namespace 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. |
| 91 | bool 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. |
| 96 | bool 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. |
| 102 | bool 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. |
| 107 | bool 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. |
| 111 | bool isBuildVectorAllZeros(const SDNode *N); |
| 112 | |
| 113 | /// Return true if the specified node is a BUILD_VECTOR node of all |
| 114 | /// ConstantSDNode or undef. |
| 115 | bool isBuildVectorOfConstantSDNodes(const SDNode *N); |
| 116 | |
| 117 | /// Return true if the specified node is a BUILD_VECTOR node of all |
| 118 | /// ConstantFPSDNode or undef. |
| 119 | bool 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. |
| 123 | bool 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 | /// |
| 138 | class 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 | |
| 144 | public: |
| 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 | |
| 232 | template<> 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. |
| 257 | template<> struct simplify_type<SDValue> { |
| 258 | using SimpleType = SDNode *; |
| 259 | |
| 260 | static SimpleType getSimplifiedValue(SDValue &Val) { |
| 261 | return Val.getNode(); |
| 262 | } |
| 263 | }; |
| 264 | template<> 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 | /// |
| 277 | class 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 | |
| 287 | public: |
| 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 | |
| 327 | private: |
| 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. |
| 360 | template<> 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. |
| 371 | struct SDNodeFlags { |
| 372 | private: |
| 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 | |
| 391 | public: |
| 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 | /// |
| 455 | class SDNode : public FoldingSetNode, public ilist_node<SDNode> { |
| 456 | private: |
| 457 | /// The operation that this node performs. |
| 458 | int16_t NodeType; |
| 459 | |
| 460 | protected: |
| 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 | |
| 475 | BEGIN_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 | }; |
| 557 | END_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 | |
| 571 | private: |
| 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 | |
| 608 | public: |
| 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 makeArrayRe |