Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 1 | //===---- CGLoopInfo.cpp - LLVM CodeGen for loop metadata -*- C++ -*-------===// |
| 2 | // |
Chandler Carruth | 2946cd7 | 2019-01-19 08:50:56 +0000 | [diff] [blame] | 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 |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "CGLoopInfo.h" |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 10 | #include "clang/AST/ASTContext.h" |
Tyler Nowicki | 9d268e1 | 2015-06-11 23:23:17 +0000 | [diff] [blame] | 11 | #include "clang/AST/Attr.h" |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 12 | #include "llvm/IR/BasicBlock.h" |
Chandler Carruth | 4aaaaab | 2018-10-18 08:16:20 +0000 | [diff] [blame] | 13 | #include "llvm/IR/CFG.h" |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 14 | #include "llvm/IR/Constants.h" |
| 15 | #include "llvm/IR/InstrTypes.h" |
| 16 | #include "llvm/IR/Instructions.h" |
| 17 | #include "llvm/IR/Metadata.h" |
Tyler Nowicki | 4e8e900 | 2015-06-08 23:27:35 +0000 | [diff] [blame] | 18 | using namespace clang::CodeGen; |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 19 | using namespace llvm; |
| 20 | |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 21 | MDNode * |
| 22 | LoopInfo::createLoopPropertiesMetadata(ArrayRef<Metadata *> LoopProperties) { |
| 23 | LLVMContext &Ctx = Header->getContext(); |
| 24 | SmallVector<Metadata *, 4> NewLoopProperties; |
| 25 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
| 26 | NewLoopProperties.push_back(TempNode.get()); |
| 27 | NewLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 28 | |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 29 | MDNode *LoopID = MDNode::getDistinct(Ctx, NewLoopProperties); |
| 30 | LoopID->replaceOperandWith(0, LoopID); |
| 31 | return LoopID; |
| 32 | } |
| 33 | |
| 34 | MDNode *LoopInfo::createPipeliningMetadata(const LoopAttributes &Attrs, |
| 35 | ArrayRef<Metadata *> LoopProperties, |
| 36 | bool &HasUserTransforms) { |
| 37 | LLVMContext &Ctx = Header->getContext(); |
| 38 | |
| 39 | Optional<bool> Enabled; |
| 40 | if (Attrs.PipelineDisabled) |
| 41 | Enabled = false; |
| 42 | else if (Attrs.PipelineInitiationInterval != 0) |
| 43 | Enabled = true; |
| 44 | |
| 45 | if (Enabled != true) { |
| 46 | SmallVector<Metadata *, 4> NewLoopProperties; |
| 47 | if (Enabled == false) { |
| 48 | NewLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 49 | NewLoopProperties.push_back( |
| 50 | MDNode::get(Ctx, {MDString::get(Ctx, "llvm.loop.pipeline.disable"), |
| 51 | ConstantAsMetadata::get(ConstantInt::get( |
| 52 | llvm::Type::getInt1Ty(Ctx), 1))})); |
| 53 | LoopProperties = NewLoopProperties; |
| 54 | } |
| 55 | return createLoopPropertiesMetadata(LoopProperties); |
| 56 | } |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 57 | |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 58 | SmallVector<Metadata *, 4> Args; |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 59 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
Duncan P. N. Exon Smith | 7fd74ac | 2015-01-19 21:30:48 +0000 | [diff] [blame] | 60 | Args.push_back(TempNode.get()); |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 61 | Args.append(LoopProperties.begin(), LoopProperties.end()); |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 62 | |
| 63 | if (Attrs.PipelineInitiationInterval > 0) { |
| 64 | Metadata *Vals[] = { |
| 65 | MDString::get(Ctx, "llvm.loop.pipeline.initiationinterval"), |
| 66 | ConstantAsMetadata::get(ConstantInt::get( |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 67 | llvm::Type::getInt32Ty(Ctx), Attrs.PipelineInitiationInterval))}; |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 68 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 69 | } |
| 70 | |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 71 | // No follow-up: This is the last transformation. |
| 72 | |
| 73 | MDNode *LoopID = MDNode::getDistinct(Ctx, Args); |
| 74 | LoopID->replaceOperandWith(0, LoopID); |
| 75 | HasUserTransforms = true; |
| 76 | return LoopID; |
| 77 | } |
| 78 | |
| 79 | MDNode * |
| 80 | LoopInfo::createPartialUnrollMetadata(const LoopAttributes &Attrs, |
| 81 | ArrayRef<Metadata *> LoopProperties, |
| 82 | bool &HasUserTransforms) { |
| 83 | LLVMContext &Ctx = Header->getContext(); |
| 84 | |
| 85 | Optional<bool> Enabled; |
| 86 | if (Attrs.UnrollEnable == LoopAttributes::Disable) |
| 87 | Enabled = false; |
| 88 | else if (Attrs.UnrollEnable == LoopAttributes::Full) |
| 89 | Enabled = None; |
| 90 | else if (Attrs.UnrollEnable != LoopAttributes::Unspecified || |
| 91 | Attrs.UnrollCount != 0) |
| 92 | Enabled = true; |
| 93 | |
| 94 | if (Enabled != true) { |
| 95 | // createFullUnrollMetadata will already have added llvm.loop.unroll.disable |
| 96 | // if unrolling is disabled. |
| 97 | return createPipeliningMetadata(Attrs, LoopProperties, HasUserTransforms); |
| 98 | } |
| 99 | |
| 100 | SmallVector<Metadata *, 4> FollowupLoopProperties; |
| 101 | |
| 102 | // Apply all loop properties to the unrolled loop. |
| 103 | FollowupLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 104 | |
| 105 | // Don't unroll an already unrolled loop. |
| 106 | FollowupLoopProperties.push_back( |
| 107 | MDNode::get(Ctx, MDString::get(Ctx, "llvm.loop.unroll.disable"))); |
| 108 | |
| 109 | bool FollowupHasTransforms = false; |
| 110 | MDNode *Followup = createPipeliningMetadata(Attrs, FollowupLoopProperties, |
| 111 | FollowupHasTransforms); |
| 112 | |
| 113 | SmallVector<Metadata *, 4> Args; |
| 114 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
| 115 | Args.push_back(TempNode.get()); |
| 116 | Args.append(LoopProperties.begin(), LoopProperties.end()); |
| 117 | |
| 118 | // Setting unroll.count |
| 119 | if (Attrs.UnrollCount > 0) { |
| 120 | Metadata *Vals[] = {MDString::get(Ctx, "llvm.loop.unroll.count"), |
| 121 | ConstantAsMetadata::get(ConstantInt::get( |
| 122 | llvm::Type::getInt32Ty(Ctx), Attrs.UnrollCount))}; |
| 123 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 124 | } |
| 125 | |
| 126 | // Setting unroll.full or unroll.disable |
| 127 | if (Attrs.UnrollEnable == LoopAttributes::Enable) { |
| 128 | Metadata *Vals[] = {MDString::get(Ctx, "llvm.loop.unroll.enable")}; |
| 129 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 130 | } |
| 131 | |
| 132 | if (FollowupHasTransforms) |
| 133 | Args.push_back(MDNode::get( |
| 134 | Ctx, {MDString::get(Ctx, "llvm.loop.unroll.followup_all"), Followup})); |
| 135 | |
| 136 | MDNode *LoopID = MDNode::getDistinct(Ctx, Args); |
| 137 | LoopID->replaceOperandWith(0, LoopID); |
| 138 | HasUserTransforms = true; |
| 139 | return LoopID; |
| 140 | } |
| 141 | |
| 142 | MDNode * |
| 143 | LoopInfo::createUnrollAndJamMetadata(const LoopAttributes &Attrs, |
| 144 | ArrayRef<Metadata *> LoopProperties, |
| 145 | bool &HasUserTransforms) { |
| 146 | LLVMContext &Ctx = Header->getContext(); |
| 147 | |
| 148 | Optional<bool> Enabled; |
| 149 | if (Attrs.UnrollAndJamEnable == LoopAttributes::Disable) |
| 150 | Enabled = false; |
| 151 | else if (Attrs.UnrollAndJamEnable == LoopAttributes::Enable || |
| 152 | Attrs.UnrollAndJamCount != 0) |
| 153 | Enabled = true; |
| 154 | |
| 155 | if (Enabled != true) { |
| 156 | SmallVector<Metadata *, 4> NewLoopProperties; |
| 157 | if (Enabled == false) { |
| 158 | NewLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 159 | NewLoopProperties.push_back(MDNode::get( |
| 160 | Ctx, MDString::get(Ctx, "llvm.loop.unroll_and_jam.disable"))); |
| 161 | LoopProperties = NewLoopProperties; |
| 162 | } |
| 163 | return createPartialUnrollMetadata(Attrs, LoopProperties, |
| 164 | HasUserTransforms); |
| 165 | } |
| 166 | |
| 167 | SmallVector<Metadata *, 4> FollowupLoopProperties; |
| 168 | FollowupLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 169 | FollowupLoopProperties.push_back( |
| 170 | MDNode::get(Ctx, MDString::get(Ctx, "llvm.loop.unroll_and_jam.disable"))); |
| 171 | |
| 172 | bool FollowupHasTransforms = false; |
| 173 | MDNode *Followup = createPartialUnrollMetadata(Attrs, FollowupLoopProperties, |
| 174 | FollowupHasTransforms); |
| 175 | |
| 176 | SmallVector<Metadata *, 4> Args; |
| 177 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
| 178 | Args.push_back(TempNode.get()); |
| 179 | Args.append(LoopProperties.begin(), LoopProperties.end()); |
| 180 | |
| 181 | // Setting unroll_and_jam.count |
| 182 | if (Attrs.UnrollAndJamCount > 0) { |
| 183 | Metadata *Vals[] = { |
| 184 | MDString::get(Ctx, "llvm.loop.unroll_and_jam.count"), |
| 185 | ConstantAsMetadata::get(ConstantInt::get(llvm::Type::getInt32Ty(Ctx), |
| 186 | Attrs.UnrollAndJamCount))}; |
| 187 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 188 | } |
| 189 | |
| 190 | if (Attrs.UnrollAndJamEnable == LoopAttributes::Enable) { |
| 191 | Metadata *Vals[] = {MDString::get(Ctx, "llvm.loop.unroll_and_jam.enable")}; |
| 192 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 193 | } |
| 194 | |
| 195 | if (FollowupHasTransforms) |
| 196 | Args.push_back(MDNode::get( |
| 197 | Ctx, {MDString::get(Ctx, "llvm.loop.unroll_and_jam.followup_outer"), |
| 198 | Followup})); |
| 199 | |
| 200 | if (UnrollAndJamInnerFollowup) |
| 201 | Args.push_back(MDNode::get( |
| 202 | Ctx, {MDString::get(Ctx, "llvm.loop.unroll_and_jam.followup_inner"), |
| 203 | UnrollAndJamInnerFollowup})); |
| 204 | |
| 205 | MDNode *LoopID = MDNode::getDistinct(Ctx, Args); |
| 206 | LoopID->replaceOperandWith(0, LoopID); |
| 207 | HasUserTransforms = true; |
| 208 | return LoopID; |
| 209 | } |
| 210 | |
| 211 | MDNode * |
| 212 | LoopInfo::createLoopVectorizeMetadata(const LoopAttributes &Attrs, |
| 213 | ArrayRef<Metadata *> LoopProperties, |
| 214 | bool &HasUserTransforms) { |
| 215 | LLVMContext &Ctx = Header->getContext(); |
| 216 | |
| 217 | Optional<bool> Enabled; |
| 218 | if (Attrs.VectorizeEnable == LoopAttributes::Disable) |
| 219 | Enabled = false; |
| 220 | else if (Attrs.VectorizeEnable != LoopAttributes::Unspecified || |
| 221 | Attrs.InterleaveCount != 0 || Attrs.VectorizeWidth != 0) |
| 222 | Enabled = true; |
| 223 | |
| 224 | if (Enabled != true) { |
| 225 | SmallVector<Metadata *, 4> NewLoopProperties; |
| 226 | if (Enabled == false) { |
| 227 | NewLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 228 | NewLoopProperties.push_back( |
| 229 | MDNode::get(Ctx, {MDString::get(Ctx, "llvm.loop.vectorize.enable"), |
| 230 | ConstantAsMetadata::get(ConstantInt::get( |
| 231 | llvm::Type::getInt1Ty(Ctx), 0))})); |
| 232 | LoopProperties = NewLoopProperties; |
| 233 | } |
| 234 | return createUnrollAndJamMetadata(Attrs, LoopProperties, HasUserTransforms); |
| 235 | } |
| 236 | |
| 237 | // Apply all loop properties to the vectorized loop. |
| 238 | SmallVector<Metadata *, 4> FollowupLoopProperties; |
| 239 | FollowupLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 240 | |
| 241 | // Don't vectorize an already vectorized loop. |
| 242 | FollowupLoopProperties.push_back( |
| 243 | MDNode::get(Ctx, MDString::get(Ctx, "llvm.loop.isvectorized"))); |
| 244 | |
| 245 | bool FollowupHasTransforms = false; |
| 246 | MDNode *Followup = createUnrollAndJamMetadata(Attrs, FollowupLoopProperties, |
| 247 | FollowupHasTransforms); |
| 248 | |
| 249 | SmallVector<Metadata *, 4> Args; |
| 250 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
| 251 | Args.push_back(TempNode.get()); |
| 252 | Args.append(LoopProperties.begin(), LoopProperties.end()); |
| 253 | |
| 254 | // Setting vectorize.width |
| 255 | if (Attrs.VectorizeWidth > 0) { |
| 256 | Metadata *Vals[] = { |
| 257 | MDString::get(Ctx, "llvm.loop.vectorize.width"), |
| 258 | ConstantAsMetadata::get(ConstantInt::get(llvm::Type::getInt32Ty(Ctx), |
| 259 | Attrs.VectorizeWidth))}; |
| 260 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 261 | } |
| 262 | |
| 263 | // Setting interleave.count |
| 264 | if (Attrs.InterleaveCount > 0) { |
| 265 | Metadata *Vals[] = { |
| 266 | MDString::get(Ctx, "llvm.loop.interleave.count"), |
| 267 | ConstantAsMetadata::get(ConstantInt::get(llvm::Type::getInt32Ty(Ctx), |
| 268 | Attrs.InterleaveCount))}; |
| 269 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 270 | } |
| 271 | |
| 272 | // Setting vectorize.enable |
| 273 | if (Attrs.VectorizeEnable != LoopAttributes::Unspecified) { |
| 274 | Metadata *Vals[] = { |
| 275 | MDString::get(Ctx, "llvm.loop.vectorize.enable"), |
| 276 | ConstantAsMetadata::get(ConstantInt::get( |
| 277 | llvm::Type::getInt1Ty(Ctx), |
| 278 | (Attrs.VectorizeEnable == LoopAttributes::Enable)))}; |
| 279 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 280 | } |
| 281 | |
| 282 | if (FollowupHasTransforms) |
| 283 | Args.push_back(MDNode::get( |
| 284 | Ctx, |
| 285 | {MDString::get(Ctx, "llvm.loop.vectorize.followup_all"), Followup})); |
| 286 | |
Duncan P. N. Exon Smith | fb49491 | 2014-12-09 18:39:32 +0000 | [diff] [blame] | 287 | MDNode *LoopID = MDNode::get(Ctx, Args); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 288 | LoopID->replaceOperandWith(0, LoopID); |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 289 | HasUserTransforms = true; |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 290 | return LoopID; |
| 291 | } |
| 292 | |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 293 | MDNode * |
| 294 | LoopInfo::createLoopDistributeMetadata(const LoopAttributes &Attrs, |
| 295 | ArrayRef<Metadata *> LoopProperties, |
| 296 | bool &HasUserTransforms) { |
| 297 | LLVMContext &Ctx = Header->getContext(); |
| 298 | |
| 299 | Optional<bool> Enabled; |
| 300 | if (Attrs.DistributeEnable == LoopAttributes::Disable) |
| 301 | Enabled = false; |
| 302 | if (Attrs.DistributeEnable == LoopAttributes::Enable) |
| 303 | Enabled = true; |
| 304 | |
| 305 | if (Enabled != true) { |
| 306 | SmallVector<Metadata *, 4> NewLoopProperties; |
| 307 | if (Enabled == false) { |
| 308 | NewLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 309 | NewLoopProperties.push_back( |
| 310 | MDNode::get(Ctx, {MDString::get(Ctx, "llvm.loop.distribute.enable"), |
| 311 | ConstantAsMetadata::get(ConstantInt::get( |
| 312 | llvm::Type::getInt1Ty(Ctx), 0))})); |
| 313 | LoopProperties = NewLoopProperties; |
| 314 | } |
| 315 | return createLoopVectorizeMetadata(Attrs, LoopProperties, |
| 316 | HasUserTransforms); |
| 317 | } |
| 318 | |
| 319 | bool FollowupHasTransforms = false; |
| 320 | MDNode *Followup = |
| 321 | createLoopVectorizeMetadata(Attrs, LoopProperties, FollowupHasTransforms); |
| 322 | |
| 323 | SmallVector<Metadata *, 4> Args; |
| 324 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
| 325 | Args.push_back(TempNode.get()); |
| 326 | Args.append(LoopProperties.begin(), LoopProperties.end()); |
| 327 | |
| 328 | Metadata *Vals[] = {MDString::get(Ctx, "llvm.loop.distribute.enable"), |
| 329 | ConstantAsMetadata::get(ConstantInt::get( |
| 330 | llvm::Type::getInt1Ty(Ctx), |
| 331 | (Attrs.DistributeEnable == LoopAttributes::Enable)))}; |
| 332 | Args.push_back(MDNode::get(Ctx, Vals)); |
| 333 | |
| 334 | if (FollowupHasTransforms) |
| 335 | Args.push_back(MDNode::get( |
| 336 | Ctx, |
| 337 | {MDString::get(Ctx, "llvm.loop.distribute.followup_all"), Followup})); |
| 338 | |
| 339 | MDNode *LoopID = MDNode::get(Ctx, Args); |
| 340 | LoopID->replaceOperandWith(0, LoopID); |
| 341 | HasUserTransforms = true; |
| 342 | return LoopID; |
| 343 | } |
| 344 | |
| 345 | MDNode *LoopInfo::createFullUnrollMetadata(const LoopAttributes &Attrs, |
| 346 | ArrayRef<Metadata *> LoopProperties, |
| 347 | bool &HasUserTransforms) { |
| 348 | LLVMContext &Ctx = Header->getContext(); |
| 349 | |
| 350 | Optional<bool> Enabled; |
| 351 | if (Attrs.UnrollEnable == LoopAttributes::Disable) |
| 352 | Enabled = false; |
| 353 | else if (Attrs.UnrollEnable == LoopAttributes::Full) |
| 354 | Enabled = true; |
| 355 | |
| 356 | if (Enabled != true) { |
| 357 | SmallVector<Metadata *, 4> NewLoopProperties; |
| 358 | if (Enabled == false) { |
| 359 | NewLoopProperties.append(LoopProperties.begin(), LoopProperties.end()); |
| 360 | NewLoopProperties.push_back( |
| 361 | MDNode::get(Ctx, MDString::get(Ctx, "llvm.loop.unroll.disable"))); |
| 362 | LoopProperties = NewLoopProperties; |
| 363 | } |
| 364 | return createLoopDistributeMetadata(Attrs, LoopProperties, |
| 365 | HasUserTransforms); |
| 366 | } |
| 367 | |
| 368 | SmallVector<Metadata *, 4> Args; |
| 369 | TempMDTuple TempNode = MDNode::getTemporary(Ctx, None); |
| 370 | Args.push_back(TempNode.get()); |
| 371 | Args.append(LoopProperties.begin(), LoopProperties.end()); |
| 372 | Args.push_back(MDNode::get(Ctx, MDString::get(Ctx, "llvm.loop.unroll.full"))); |
| 373 | |
| 374 | // No follow-up: there is no loop after full unrolling. |
| 375 | // TODO: Warn if there are transformations after full unrolling. |
| 376 | |
| 377 | MDNode *LoopID = MDNode::getDistinct(Ctx, Args); |
| 378 | LoopID->replaceOperandWith(0, LoopID); |
| 379 | HasUserTransforms = true; |
| 380 | return LoopID; |
| 381 | } |
| 382 | |
| 383 | MDNode *LoopInfo::createMetadata( |
| 384 | const LoopAttributes &Attrs, |
| 385 | llvm::ArrayRef<llvm::Metadata *> AdditionalLoopProperties, |
| 386 | bool &HasUserTransforms) { |
| 387 | SmallVector<Metadata *, 3> LoopProperties; |
| 388 | |
| 389 | // If we have a valid start debug location for the loop, add it. |
| 390 | if (StartLoc) { |
| 391 | LoopProperties.push_back(StartLoc.getAsMDNode()); |
| 392 | |
| 393 | // If we also have a valid end debug location for the loop, add it. |
| 394 | if (EndLoc) |
| 395 | LoopProperties.push_back(EndLoc.getAsMDNode()); |
| 396 | } |
| 397 | |
| 398 | assert(!!AccGroup == Attrs.IsParallel && |
| 399 | "There must be an access group iff the loop is parallel"); |
| 400 | if (Attrs.IsParallel) { |
| 401 | LLVMContext &Ctx = Header->getContext(); |
| 402 | LoopProperties.push_back(MDNode::get( |
| 403 | Ctx, {MDString::get(Ctx, "llvm.loop.parallel_accesses"), AccGroup})); |
| 404 | } |
| 405 | |
| 406 | LoopProperties.insert(LoopProperties.end(), AdditionalLoopProperties.begin(), |
| 407 | AdditionalLoopProperties.end()); |
| 408 | return createFullUnrollMetadata(Attrs, LoopProperties, HasUserTransforms); |
| 409 | } |
| 410 | |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 411 | LoopAttributes::LoopAttributes(bool IsParallel) |
Tyler Nowicki | da46d0e | 2015-07-14 23:03:09 +0000 | [diff] [blame] | 412 | : IsParallel(IsParallel), VectorizeEnable(LoopAttributes::Unspecified), |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 413 | UnrollEnable(LoopAttributes::Unspecified), |
| 414 | UnrollAndJamEnable(LoopAttributes::Unspecified), VectorizeWidth(0), |
| 415 | InterleaveCount(0), UnrollCount(0), UnrollAndJamCount(0), |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 416 | DistributeEnable(LoopAttributes::Unspecified), PipelineDisabled(false), |
| 417 | PipelineInitiationInterval(0) {} |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 418 | |
| 419 | void LoopAttributes::clear() { |
| 420 | IsParallel = false; |
Tyler Nowicki | da46d0e | 2015-07-14 23:03:09 +0000 | [diff] [blame] | 421 | VectorizeWidth = 0; |
| 422 | InterleaveCount = 0; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 423 | UnrollCount = 0; |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 424 | UnrollAndJamCount = 0; |
Tyler Nowicki | da46d0e | 2015-07-14 23:03:09 +0000 | [diff] [blame] | 425 | VectorizeEnable = LoopAttributes::Unspecified; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 426 | UnrollEnable = LoopAttributes::Unspecified; |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 427 | UnrollAndJamEnable = LoopAttributes::Unspecified; |
Adam Nemet | 9c84859 | 2016-08-24 04:31:56 +0000 | [diff] [blame] | 428 | DistributeEnable = LoopAttributes::Unspecified; |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 429 | PipelineDisabled = false; |
| 430 | PipelineInitiationInterval = 0; |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 431 | } |
| 432 | |
Hal Finkel | c07e19b | 2016-05-25 21:53:24 +0000 | [diff] [blame] | 433 | LoopInfo::LoopInfo(BasicBlock *Header, const LoopAttributes &Attrs, |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 434 | const llvm::DebugLoc &StartLoc, const llvm::DebugLoc &EndLoc, |
| 435 | LoopInfo *Parent) |
| 436 | : Header(Header), Attrs(Attrs), StartLoc(StartLoc), EndLoc(EndLoc), |
| 437 | Parent(Parent) { |
| 438 | |
| 439 | if (Attrs.IsParallel) { |
| 440 | // Create an access group for this loop. |
| 441 | LLVMContext &Ctx = Header->getContext(); |
| 442 | AccGroup = MDNode::getDistinct(Ctx, {}); |
| 443 | } |
| 444 | |
| 445 | if (!Attrs.IsParallel && Attrs.VectorizeWidth == 0 && |
| 446 | Attrs.InterleaveCount == 0 && Attrs.UnrollCount == 0 && |
| 447 | Attrs.UnrollAndJamCount == 0 && !Attrs.PipelineDisabled && |
| 448 | Attrs.PipelineInitiationInterval == 0 && |
| 449 | Attrs.VectorizeEnable == LoopAttributes::Unspecified && |
| 450 | Attrs.UnrollEnable == LoopAttributes::Unspecified && |
| 451 | Attrs.UnrollAndJamEnable == LoopAttributes::Unspecified && |
| 452 | Attrs.DistributeEnable == LoopAttributes::Unspecified && !StartLoc && |
| 453 | !EndLoc) |
| 454 | return; |
| 455 | |
| 456 | TempLoopID = MDNode::getTemporary(Header->getContext(), None); |
| 457 | } |
| 458 | |
| 459 | void LoopInfo::finish() { |
| 460 | // We did not annotate the loop body instructions because there are no |
| 461 | // attributes for this loop. |
| 462 | if (!TempLoopID) |
| 463 | return; |
| 464 | |
| 465 | MDNode *LoopID; |
| 466 | LoopAttributes CurLoopAttr = Attrs; |
| 467 | LLVMContext &Ctx = Header->getContext(); |
| 468 | |
| 469 | if (Parent && (Parent->Attrs.UnrollAndJamEnable || |
| 470 | Parent->Attrs.UnrollAndJamCount != 0)) { |
| 471 | // Parent unroll-and-jams this loop. |
| 472 | // Split the transformations in those that happens before the unroll-and-jam |
| 473 | // and those after. |
| 474 | |
| 475 | LoopAttributes BeforeJam, AfterJam; |
| 476 | |
| 477 | BeforeJam.IsParallel = AfterJam.IsParallel = Attrs.IsParallel; |
| 478 | |
| 479 | BeforeJam.VectorizeWidth = Attrs.VectorizeWidth; |
| 480 | BeforeJam.InterleaveCount = Attrs.InterleaveCount; |
| 481 | BeforeJam.VectorizeEnable = Attrs.VectorizeEnable; |
| 482 | BeforeJam.DistributeEnable = Attrs.DistributeEnable; |
| 483 | |
| 484 | switch (Attrs.UnrollEnable) { |
| 485 | case LoopAttributes::Unspecified: |
| 486 | case LoopAttributes::Disable: |
| 487 | BeforeJam.UnrollEnable = Attrs.UnrollEnable; |
| 488 | AfterJam.UnrollEnable = Attrs.UnrollEnable; |
| 489 | break; |
| 490 | case LoopAttributes::Full: |
| 491 | BeforeJam.UnrollEnable = LoopAttributes::Full; |
| 492 | break; |
| 493 | case LoopAttributes::Enable: |
| 494 | AfterJam.UnrollEnable = LoopAttributes::Enable; |
| 495 | break; |
| 496 | } |
| 497 | |
| 498 | AfterJam.UnrollCount = Attrs.UnrollCount; |
| 499 | AfterJam.PipelineDisabled = Attrs.PipelineDisabled; |
| 500 | AfterJam.PipelineInitiationInterval = Attrs.PipelineInitiationInterval; |
| 501 | |
| 502 | // If this loop is subject of an unroll-and-jam by the parent loop, and has |
| 503 | // an unroll-and-jam annotation itself, we have to decide whether to first |
| 504 | // apply the parent's unroll-and-jam or this loop's unroll-and-jam. The |
| 505 | // UnrollAndJam pass processes loops from inner to outer, so we apply the |
| 506 | // inner first. |
| 507 | BeforeJam.UnrollAndJamCount = Attrs.UnrollAndJamCount; |
| 508 | BeforeJam.UnrollAndJamEnable = Attrs.UnrollAndJamEnable; |
| 509 | |
| 510 | // Set the inner followup metadata to process by the outer loop. Only |
| 511 | // consider the first inner loop. |
| 512 | if (!Parent->UnrollAndJamInnerFollowup) { |
| 513 | // Splitting the attributes into a BeforeJam and an AfterJam part will |
| 514 | // stop 'llvm.loop.isvectorized' (generated by vectorization in BeforeJam) |
| 515 | // to be forwarded to the AfterJam part. We detect the situation here and |
| 516 | // add it manually. |
| 517 | SmallVector<Metadata *, 1> BeforeLoopProperties; |
| 518 | if (BeforeJam.VectorizeEnable != LoopAttributes::Unspecified || |
| 519 | BeforeJam.InterleaveCount != 0 || BeforeJam.VectorizeWidth != 0) |
| 520 | BeforeLoopProperties.push_back( |
| 521 | MDNode::get(Ctx, MDString::get(Ctx, "llvm.loop.isvectorized"))); |
| 522 | |
| 523 | bool InnerFollowupHasTransform = false; |
| 524 | MDNode *InnerFollowup = createMetadata(AfterJam, BeforeLoopProperties, |
| 525 | InnerFollowupHasTransform); |
| 526 | if (InnerFollowupHasTransform) |
| 527 | Parent->UnrollAndJamInnerFollowup = InnerFollowup; |
| 528 | } |
| 529 | |
| 530 | CurLoopAttr = BeforeJam; |
| 531 | } |
| 532 | |
| 533 | bool HasUserTransforms = false; |
| 534 | LoopID = createMetadata(CurLoopAttr, {}, HasUserTransforms); |
| 535 | TempLoopID->replaceAllUsesWith(LoopID); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 536 | } |
| 537 | |
Benjamin Kramer | 81cb4b7 | 2016-11-24 16:01:20 +0000 | [diff] [blame] | 538 | void LoopInfoStack::push(BasicBlock *Header, const llvm::DebugLoc &StartLoc, |
| 539 | const llvm::DebugLoc &EndLoc) { |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 540 | Active.push_back(LoopInfo(Header, StagedAttrs, StartLoc, EndLoc, |
| 541 | Active.empty() ? nullptr : &Active.back())); |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 542 | // Clear the attributes so nested loops do not inherit them. |
| 543 | StagedAttrs.clear(); |
| 544 | } |
| 545 | |
| 546 | void LoopInfoStack::push(BasicBlock *Header, clang::ASTContext &Ctx, |
Hal Finkel | c07e19b | 2016-05-25 21:53:24 +0000 | [diff] [blame] | 547 | ArrayRef<const clang::Attr *> Attrs, |
Benjamin Kramer | 81cb4b7 | 2016-11-24 16:01:20 +0000 | [diff] [blame] | 548 | const llvm::DebugLoc &StartLoc, |
| 549 | const llvm::DebugLoc &EndLoc) { |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 550 | |
| 551 | // Identify loop hint attributes from Attrs. |
Tyler Nowicki | 9d268e1 | 2015-06-11 23:23:17 +0000 | [diff] [blame] | 552 | for (const auto *Attr : Attrs) { |
| 553 | const LoopHintAttr *LH = dyn_cast<LoopHintAttr>(Attr); |
Anastasia Stulova | 6bdbcbb | 2016-02-19 18:30:11 +0000 | [diff] [blame] | 554 | const OpenCLUnrollHintAttr *OpenCLHint = |
| 555 | dyn_cast<OpenCLUnrollHintAttr>(Attr); |
Tyler Nowicki | 9d268e1 | 2015-06-11 23:23:17 +0000 | [diff] [blame] | 556 | |
| 557 | // Skip non loop hint attributes |
Anastasia Stulova | 6bdbcbb | 2016-02-19 18:30:11 +0000 | [diff] [blame] | 558 | if (!LH && !OpenCLHint) { |
Tyler Nowicki | 9d268e1 | 2015-06-11 23:23:17 +0000 | [diff] [blame] | 559 | continue; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 560 | } |
| 561 | |
Anastasia Stulova | 6bdbcbb | 2016-02-19 18:30:11 +0000 | [diff] [blame] | 562 | LoopHintAttr::OptionType Option = LoopHintAttr::Unroll; |
| 563 | LoopHintAttr::LoopHintState State = LoopHintAttr::Disable; |
| 564 | unsigned ValueInt = 1; |
| 565 | // Translate opencl_unroll_hint attribute argument to |
| 566 | // equivalent LoopHintAttr enums. |
Fangrui Song | 6907ce2 | 2018-07-30 19:24:48 +0000 | [diff] [blame] | 567 | // OpenCL v2.0 s6.11.5: |
Andrew Savonichev | 76b178d | 2019-03-20 16:43:07 +0000 | [diff] [blame] | 568 | // 0 - enable unroll (no argument). |
Anastasia Stulova | 6bdbcbb | 2016-02-19 18:30:11 +0000 | [diff] [blame] | 569 | // 1 - disable unroll. |
| 570 | // other positive integer n - unroll by n. |
| 571 | if (OpenCLHint) { |
| 572 | ValueInt = OpenCLHint->getUnrollHint(); |
| 573 | if (ValueInt == 0) { |
Andrew Savonichev | 76b178d | 2019-03-20 16:43:07 +0000 | [diff] [blame] | 574 | State = LoopHintAttr::Enable; |
Anastasia Stulova | 6bdbcbb | 2016-02-19 18:30:11 +0000 | [diff] [blame] | 575 | } else if (ValueInt != 1) { |
| 576 | Option = LoopHintAttr::UnrollCount; |
| 577 | State = LoopHintAttr::Numeric; |
| 578 | } |
| 579 | } else if (LH) { |
| 580 | auto *ValueExpr = LH->getValue(); |
| 581 | if (ValueExpr) { |
| 582 | llvm::APSInt ValueAPS = ValueExpr->EvaluateKnownConstInt(Ctx); |
| 583 | ValueInt = ValueAPS.getSExtValue(); |
| 584 | } |
| 585 | |
| 586 | Option = LH->getOption(); |
| 587 | State = LH->getState(); |
| 588 | } |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 589 | switch (State) { |
| 590 | case LoopHintAttr::Disable: |
| 591 | switch (Option) { |
| 592 | case LoopHintAttr::Vectorize: |
| 593 | // Disable vectorization by specifying a width of 1. |
| 594 | setVectorizeWidth(1); |
| 595 | break; |
| 596 | case LoopHintAttr::Interleave: |
| 597 | // Disable interleaving by speciyfing a count of 1. |
| 598 | setInterleaveCount(1); |
| 599 | break; |
| 600 | case LoopHintAttr::Unroll: |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 601 | setUnrollState(LoopAttributes::Disable); |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 602 | break; |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 603 | case LoopHintAttr::UnrollAndJam: |
| 604 | setUnrollAndJamState(LoopAttributes::Disable); |
| 605 | break; |
Adam Nemet | 2de463e | 2016-06-14 12:04:26 +0000 | [diff] [blame] | 606 | case LoopHintAttr::Distribute: |
| 607 | setDistributeState(false); |
| 608 | break; |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 609 | case LoopHintAttr::PipelineDisabled: |
| 610 | setPipelineDisabled(true); |
| 611 | break; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 612 | case LoopHintAttr::UnrollCount: |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 613 | case LoopHintAttr::UnrollAndJamCount: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 614 | case LoopHintAttr::VectorizeWidth: |
| 615 | case LoopHintAttr::InterleaveCount: |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 616 | case LoopHintAttr::PipelineInitiationInterval: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 617 | llvm_unreachable("Options cannot be disabled."); |
| 618 | break; |
Tyler Nowicki | 9d268e1 | 2015-06-11 23:23:17 +0000 | [diff] [blame] | 619 | } |
| 620 | break; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 621 | case LoopHintAttr::Enable: |
| 622 | switch (Option) { |
| 623 | case LoopHintAttr::Vectorize: |
| 624 | case LoopHintAttr::Interleave: |
| 625 | setVectorizeEnable(true); |
| 626 | break; |
| 627 | case LoopHintAttr::Unroll: |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 628 | setUnrollState(LoopAttributes::Enable); |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 629 | break; |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 630 | case LoopHintAttr::UnrollAndJam: |
| 631 | setUnrollAndJamState(LoopAttributes::Enable); |
| 632 | break; |
Adam Nemet | 2de463e | 2016-06-14 12:04:26 +0000 | [diff] [blame] | 633 | case LoopHintAttr::Distribute: |
| 634 | setDistributeState(true); |
| 635 | break; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 636 | case LoopHintAttr::UnrollCount: |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 637 | case LoopHintAttr::UnrollAndJamCount: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 638 | case LoopHintAttr::VectorizeWidth: |
| 639 | case LoopHintAttr::InterleaveCount: |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 640 | case LoopHintAttr::PipelineDisabled: |
| 641 | case LoopHintAttr::PipelineInitiationInterval: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 642 | llvm_unreachable("Options cannot enabled."); |
| 643 | break; |
| 644 | } |
| 645 | break; |
| 646 | case LoopHintAttr::AssumeSafety: |
| 647 | switch (Option) { |
| 648 | case LoopHintAttr::Vectorize: |
| 649 | case LoopHintAttr::Interleave: |
| 650 | // Apply "llvm.mem.parallel_loop_access" metadata to load/stores. |
| 651 | setParallel(true); |
| 652 | setVectorizeEnable(true); |
| 653 | break; |
| 654 | case LoopHintAttr::Unroll: |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 655 | case LoopHintAttr::UnrollAndJam: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 656 | case LoopHintAttr::UnrollCount: |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 657 | case LoopHintAttr::UnrollAndJamCount: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 658 | case LoopHintAttr::VectorizeWidth: |
| 659 | case LoopHintAttr::InterleaveCount: |
Adam Nemet | 2de463e | 2016-06-14 12:04:26 +0000 | [diff] [blame] | 660 | case LoopHintAttr::Distribute: |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 661 | case LoopHintAttr::PipelineDisabled: |
| 662 | case LoopHintAttr::PipelineInitiationInterval: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 663 | llvm_unreachable("Options cannot be used to assume mem safety."); |
| 664 | break; |
| 665 | } |
| 666 | break; |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 667 | case LoopHintAttr::Full: |
| 668 | switch (Option) { |
| 669 | case LoopHintAttr::Unroll: |
| 670 | setUnrollState(LoopAttributes::Full); |
| 671 | break; |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 672 | case LoopHintAttr::UnrollAndJam: |
| 673 | setUnrollAndJamState(LoopAttributes::Full); |
| 674 | break; |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 675 | case LoopHintAttr::Vectorize: |
| 676 | case LoopHintAttr::Interleave: |
| 677 | case LoopHintAttr::UnrollCount: |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 678 | case LoopHintAttr::UnrollAndJamCount: |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 679 | case LoopHintAttr::VectorizeWidth: |
| 680 | case LoopHintAttr::InterleaveCount: |
Adam Nemet | 2de463e | 2016-06-14 12:04:26 +0000 | [diff] [blame] | 681 | case LoopHintAttr::Distribute: |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 682 | case LoopHintAttr::PipelineDisabled: |
| 683 | case LoopHintAttr::PipelineInitiationInterval: |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 684 | llvm_unreachable("Options cannot be used with 'full' hint."); |
| 685 | break; |
| 686 | } |
| 687 | break; |
| 688 | case LoopHintAttr::Numeric: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 689 | switch (Option) { |
| 690 | case LoopHintAttr::VectorizeWidth: |
| 691 | setVectorizeWidth(ValueInt); |
| 692 | break; |
| 693 | case LoopHintAttr::InterleaveCount: |
| 694 | setInterleaveCount(ValueInt); |
| 695 | break; |
| 696 | case LoopHintAttr::UnrollCount: |
| 697 | setUnrollCount(ValueInt); |
| 698 | break; |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 699 | case LoopHintAttr::UnrollAndJamCount: |
| 700 | setUnrollAndJamCount(ValueInt); |
| 701 | break; |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 702 | case LoopHintAttr::PipelineInitiationInterval: |
| 703 | setPipelineInitiationInterval(ValueInt); |
| 704 | break; |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 705 | case LoopHintAttr::Unroll: |
David Green | c8e3924 | 2018-08-01 14:36:12 +0000 | [diff] [blame] | 706 | case LoopHintAttr::UnrollAndJam: |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 707 | case LoopHintAttr::Vectorize: |
| 708 | case LoopHintAttr::Interleave: |
Adam Nemet | 2de463e | 2016-06-14 12:04:26 +0000 | [diff] [blame] | 709 | case LoopHintAttr::Distribute: |
Aaron Ballman | 9bdf515 | 2019-01-04 17:20:00 +0000 | [diff] [blame] | 710 | case LoopHintAttr::PipelineDisabled: |
Mark Heffernan | 397a98d | 2015-08-10 17:29:39 +0000 | [diff] [blame] | 711 | llvm_unreachable("Options cannot be assigned a value."); |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 712 | break; |
| 713 | } |
Tyler Nowicki | 9d268e1 | 2015-06-11 23:23:17 +0000 | [diff] [blame] | 714 | break; |
| 715 | } |
| 716 | } |
| 717 | |
Tyler Nowicki | 54c020d | 2015-07-27 20:10:20 +0000 | [diff] [blame] | 718 | /// Stage the attributes. |
Amara Emerson | 652795d | 2016-11-10 14:44:30 +0000 | [diff] [blame] | 719 | push(Header, StartLoc, EndLoc); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 720 | } |
| 721 | |
| 722 | void LoopInfoStack::pop() { |
| 723 | assert(!Active.empty() && "No active loops to pop"); |
Michael Kruse | 58e7642 | 2019-04-01 17:47:41 +0000 | [diff] [blame] | 724 | Active.back().finish(); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 725 | Active.pop_back(); |
| 726 | } |
| 727 | |
| 728 | void LoopInfoStack::InsertHelper(Instruction *I) const { |
Michael Kruse | 0535137 | 2018-12-20 21:24:54 +0000 | [diff] [blame] | 729 | if (I->mayReadOrWriteMemory()) { |
| 730 | SmallVector<Metadata *, 4> AccessGroups; |
| 731 | for (const LoopInfo &AL : Active) { |
| 732 | // Here we assume that every loop that has an access group is parallel. |
| 733 | if (MDNode *Group = AL.getAccessGroup()) |
| 734 | AccessGroups.push_back(Group); |
| 735 | } |
| 736 | MDNode *UnionMD = nullptr; |
| 737 | if (AccessGroups.size() == 1) |
| 738 | UnionMD = cast<MDNode>(AccessGroups[0]); |
| 739 | else if (AccessGroups.size() >= 2) |
| 740 | UnionMD = MDNode::get(I->getContext(), AccessGroups); |
| 741 | I->setMetadata("llvm.access.group", UnionMD); |
| 742 | } |
| 743 | |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 744 | if (!hasInfo()) |
| 745 | return; |
| 746 | |
| 747 | const LoopInfo &L = getInfo(); |
| 748 | if (!L.getLoopID()) |
| 749 | return; |
| 750 | |
Chandler Carruth | 4aaaaab | 2018-10-18 08:16:20 +0000 | [diff] [blame] | 751 | if (I->isTerminator()) { |
| 752 | for (BasicBlock *Succ : successors(I)) |
| 753 | if (Succ == L.getHeader()) { |
| 754 | I->setMetadata(llvm::LLVMContext::MD_loop, L.getLoopID()); |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 755 | break; |
| 756 | } |
| 757 | return; |
| 758 | } |
Alexander Musman | 515ad8c | 2014-05-22 08:54:05 +0000 | [diff] [blame] | 759 | } |