unittests/IR/PatternMatch.cpp

   1 //===---- llvm/unittest/IR/PatternMatch.cpp - PatternMatch unit tests ----===//
   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 #include "llvm/IR/PatternMatch.h"
  10 #include "llvm/ADT/APSInt.h"
  11 #include "llvm/ADT/STLExtras.h"
  12 #include "llvm/Analysis/ValueTracking.h"
  13 #include "llvm/IR/BasicBlock.h"
  14 #include "llvm/IR/Constants.h"
  15 #include "llvm/IR/DataLayout.h"
  16 #include "llvm/IR/DerivedTypes.h"
  17 #include "llvm/IR/Function.h"
  18 #include "llvm/IR/IRBuilder.h"
  19 #include "llvm/IR/Instructions.h"
  20 #include "llvm/IR/LLVMContext.h"
  21 #include "llvm/IR/MDBuilder.h"
  22 #include "llvm/IR/Module.h"
  23 #include "llvm/IR/NoFolder.h"
  24 #include "llvm/IR/Operator.h"
  25 #include "llvm/IR/Type.h"
  26 #include "gtest/gtest.h"
  27
  28 using namespace llvm;
  29 using namespace llvm::PatternMatch;
  30
  31 namespace {
  32
  33 struct PatternMatchTest : ::testing::Test {
  34   LLVMContext Ctx;
  35   std::unique_ptr<Module> M;
  36   Function *F;
  37   BasicBlock *BB;
  38   IRBuilder<NoFolder> IRB;
  39
  40   PatternMatchTest()
  41       : M(new Module("PatternMatchTestModule", Ctx)),
  42         F(Function::Create(
  43             FunctionType::get(Type::getVoidTy(Ctx), /* IsVarArg */ false),
  44             Function::ExternalLinkage, "f", M.get())),
  45         BB(BasicBlock::Create(Ctx, "entry", F)), IRB(BB) {}
  46 };
  47
  48 TEST_F(PatternMatchTest, OneUse) {
  49   // Build up a little tree of values:
  50   //
  51   //   One  = (1 + 2) + 42
  52   //   Two  = One + 42
  53   //   Leaf = (Two + 8) + (Two + 13)
  54   Value *One = IRB.CreateAdd(IRB.CreateAdd(IRB.getInt32(1), IRB.getInt32(2)),
  55                              IRB.getInt32(42));
  56   Value *Two = IRB.CreateAdd(One, IRB.getInt32(42));
  57   Value *Leaf = IRB.CreateAdd(IRB.CreateAdd(Two, IRB.getInt32(8)),
  58                               IRB.CreateAdd(Two, IRB.getInt32(13)));
  59   Value *V;
  60
  61   EXPECT_TRUE(m_OneUse(m_Value(V)).match(One));
  62   EXPECT_EQ(One, V);
  63
  64   EXPECT_FALSE(m_OneUse(m_Value()).match(Two));
  65   EXPECT_FALSE(m_OneUse(m_Value()).match(Leaf));
  66 }
  67
  68 TEST_F(PatternMatchTest, SpecificIntEQ) {
  69   Type *IntTy = IRB.getInt32Ty();
  70   unsigned BitWidth = IntTy->getScalarSizeInBits();
  71
  72   Value *Zero = ConstantInt::get(IntTy, 0);
  73   Value *One = ConstantInt::get(IntTy, 1);
  74   Value *NegOne = ConstantInt::get(IntTy, -1);
  75
  76   EXPECT_TRUE(
  77       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 0))
  78           .match(Zero));
  79   EXPECT_FALSE(
  80       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 0))
  81           .match(One));
  82   EXPECT_FALSE(
  83       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 0))
  84           .match(NegOne));
  85
  86   EXPECT_FALSE(
  87       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 1))
  88           .match(Zero));
  89   EXPECT_TRUE(
  90       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 1))
  91           .match(One));
  92   EXPECT_FALSE(
  93       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 1))
  94           .match(NegOne));
  95
  96   EXPECT_FALSE(
  97       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, -1))
  98           .match(Zero));
  99   EXPECT_FALSE(
 100       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, -1))
 101           .match(One));
 102   EXPECT_TRUE(
 103       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, -1))
 104           .match(NegOne));
 105 }
 106
 107 TEST_F(PatternMatchTest, SpecificIntNE) {
 108   Type *IntTy = IRB.getInt32Ty();
 109   unsigned BitWidth = IntTy->getScalarSizeInBits();
 110
 111   Value *Zero = ConstantInt::get(IntTy, 0);
 112   Value *One = ConstantInt::get(IntTy, 1);
 113   Value *NegOne = ConstantInt::get(IntTy, -1);
 114
 115   EXPECT_FALSE(
 116       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 0))
 117           .match(Zero));
 118   EXPECT_TRUE(
 119       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 0))
 120           .match(One));
 121   EXPECT_TRUE(
 122       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 0))
 123           .match(NegOne));
 124
 125   EXPECT_TRUE(
 126       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 1))
 127           .match(Zero));
 128   EXPECT_FALSE(
 129       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 1))
 130           .match(One));
 131   EXPECT_TRUE(
 132       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 1))
 133           .match(NegOne));
 134
 135   EXPECT_TRUE(
 136       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, -1))
 137           .match(Zero));
 138   EXPECT_TRUE(
 139       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, -1))
 140           .match(One));
 141   EXPECT_FALSE(
 142       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, -1))
 143           .match(NegOne));
 144 }
 145
 146 TEST_F(PatternMatchTest, SpecificIntUGT) {
 147   Type *IntTy = IRB.getInt32Ty();
 148   unsigned BitWidth = IntTy->getScalarSizeInBits();
 149
 150   Value *Zero = ConstantInt::get(IntTy, 0);
 151   Value *One = ConstantInt::get(IntTy, 1);
 152   Value *NegOne = ConstantInt::get(IntTy, -1);
 153
 154   EXPECT_FALSE(
 155       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 0))
 156           .match(Zero));
 157   EXPECT_TRUE(
 158       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 0))
 159           .match(One));
 160   EXPECT_TRUE(
 161       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 0))
 162           .match(NegOne));
 163
 164   EXPECT_FALSE(
 165       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 1))
 166           .match(Zero));
 167   EXPECT_FALSE(
 168       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 1))
 169           .match(One));
 170   EXPECT_TRUE(
 171       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 1))
 172           .match(NegOne));
 173
 174   EXPECT_FALSE(
 175       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, -1))
 176           .match(Zero));
 177   EXPECT_FALSE(
 178       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, -1))
 179           .match(One));
 180   EXPECT_FALSE(
 181       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, -1))
 182           .match(NegOne));
 183 }
 184
 185 TEST_F(PatternMatchTest, SpecificIntUGE) {
 186   Type *IntTy = IRB.getInt32Ty();
 187   unsigned BitWidth = IntTy->getScalarSizeInBits();
 188
 189   Value *Zero = ConstantInt::get(IntTy, 0);
 190   Value *One = ConstantInt::get(IntTy, 1);
 191   Value *NegOne = ConstantInt::get(IntTy, -1);
 192
 193   EXPECT_TRUE(
 194       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 0))
 195           .match(Zero));
 196   EXPECT_TRUE(
 197       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 0))
 198           .match(One));
 199   EXPECT_TRUE(
 200       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 0))
 201           .match(NegOne));
 202
 203   EXPECT_FALSE(
 204       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 1))
 205           .match(Zero));
 206   EXPECT_TRUE(
 207       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 1))
 208           .match(One));
 209   EXPECT_TRUE(
 210       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 1))
 211           .match(NegOne));
 212
 213   EXPECT_FALSE(
 214       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, -1))
 215           .match(Zero));
 216   EXPECT_FALSE(
 217       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, -1))
 218           .match(One));
 219   EXPECT_TRUE(
 220       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, -1))
 221           .match(NegOne));
 222 }
 223
 224 TEST_F(PatternMatchTest, SpecificIntULT) {
 225   Type *IntTy = IRB.getInt32Ty();
 226   unsigned BitWidth = IntTy->getScalarSizeInBits();
 227
 228   Value *Zero = ConstantInt::get(IntTy, 0);
 229   Value *One = ConstantInt::get(IntTy, 1);
 230   Value *NegOne = ConstantInt::get(IntTy, -1);
 231
 232   EXPECT_FALSE(
 233       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 0))
 234           .match(Zero));
 235   EXPECT_FALSE(
 236       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 0))
 237           .match(One));
 238   EXPECT_FALSE(
 239       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 0))
 240           .match(NegOne));
 241
 242   EXPECT_TRUE(
 243       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 1))
 244           .match(Zero));
 245   EXPECT_FALSE(
 246       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 1))
 247           .match(One));
 248   EXPECT_FALSE(
 249       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 1))
 250           .match(NegOne));
 251
 252   EXPECT_TRUE(
 253       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, -1))
 254           .match(Zero));
 255   EXPECT_TRUE(
 256       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, -1))
 257           .match(One));
 258   EXPECT_FALSE(
 259       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, -1))
 260           .match(NegOne));
 261 }
 262
 263 TEST_F(PatternMatchTest, SpecificIntULE) {
 264   Type *IntTy = IRB.getInt32Ty();
 265   unsigned BitWidth = IntTy->getScalarSizeInBits();
 266
 267   Value *Zero = ConstantInt::get(IntTy, 0);
 268   Value *One = ConstantInt::get(IntTy, 1);
 269   Value *NegOne = ConstantInt::get(IntTy, -1);
 270
 271   EXPECT_TRUE(
 272       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 0))
 273           .match(Zero));
 274   EXPECT_FALSE(
 275       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 0))
 276           .match(One));
 277   EXPECT_FALSE(
 278       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 0))
 279           .match(NegOne));
 280
 281   EXPECT_TRUE(
 282       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 1))
 283           .match(Zero));
 284   EXPECT_TRUE(
 285       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 1))
 286           .match(One));
 287   EXPECT_FALSE(
 288       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 1))
 289           .match(NegOne));
 290
 291   EXPECT_TRUE(
 292       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, -1))
 293           .match(Zero));
 294   EXPECT_TRUE(
 295       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, -1))
 296           .match(One));
 297   EXPECT_TRUE(
 298       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, -1))
 299           .match(NegOne));
 300 }
 301
 302 TEST_F(PatternMatchTest, SpecificIntSGT) {
 303   Type *IntTy = IRB.getInt32Ty();
 304   unsigned BitWidth = IntTy->getScalarSizeInBits();
 305
 306   Value *Zero = ConstantInt::get(IntTy, 0);
 307   Value *One = ConstantInt::get(IntTy, 1);
 308   Value *NegOne = ConstantInt::get(IntTy, -1);
 309
 310   EXPECT_FALSE(
 311       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 0))
 312           .match(Zero));
 313   EXPECT_TRUE(
 314       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 0))
 315           .match(One));
 316   EXPECT_FALSE(
 317       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 0))
 318           .match(NegOne));
 319
 320   EXPECT_FALSE(
 321       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 1))
 322           .match(Zero));
 323   EXPECT_FALSE(
 324       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 1))
 325           .match(One));
 326   EXPECT_FALSE(
 327       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 1))
 328           .match(NegOne));
 329
 330   EXPECT_TRUE(
 331       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, -1))
 332           .match(Zero));
 333   EXPECT_TRUE(
 334       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, -1))
 335           .match(One));
 336   EXPECT_FALSE(
 337       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, -1))
 338           .match(NegOne));
 339 }
 340
 341 TEST_F(PatternMatchTest, SpecificIntSGE) {
 342   Type *IntTy = IRB.getInt32Ty();
 343   unsigned BitWidth = IntTy->getScalarSizeInBits();
 344
 345   Value *Zero = ConstantInt::get(IntTy, 0);
 346   Value *One = ConstantInt::get(IntTy, 1);
 347   Value *NegOne = ConstantInt::get(IntTy, -1);
 348
 349   EXPECT_TRUE(
 350       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 0))
 351           .match(Zero));
 352   EXPECT_TRUE(
 353       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 0))
 354           .match(One));
 355   EXPECT_FALSE(
 356       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 0))
 357           .match(NegOne));
 358
 359   EXPECT_FALSE(
 360       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 1))
 361           .match(Zero));
 362   EXPECT_TRUE(
 363       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 1))
 364           .match(One));
 365   EXPECT_FALSE(
 366       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 1))
 367           .match(NegOne));
 368
 369   EXPECT_TRUE(
 370       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, -1))
 371           .match(Zero));
 372   EXPECT_TRUE(
 373       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, -1))
 374           .match(One));
 375   EXPECT_TRUE(
 376       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, -1))
 377           .match(NegOne));
 378 }
 379
 380 TEST_F(PatternMatchTest, SpecificIntSLT) {
 381   Type *IntTy = IRB.getInt32Ty();
 382   unsigned BitWidth = IntTy->getScalarSizeInBits();
 383
 384   Value *Zero = ConstantInt::get(IntTy, 0);
 385   Value *One = ConstantInt::get(IntTy, 1);
 386   Value *NegOne = ConstantInt::get(IntTy, -1);
 387
 388   EXPECT_FALSE(
 389       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 0))
 390           .match(Zero));
 391   EXPECT_FALSE(
 392       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 0))
 393           .match(One));
 394   EXPECT_TRUE(
 395       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 0))
 396           .match(NegOne));
 397
 398   EXPECT_TRUE(
 399       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 1))
 400           .match(Zero));
 401   EXPECT_FALSE(
 402       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 1))
 403           .match(One));
 404   EXPECT_TRUE(
 405       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 1))
 406           .match(NegOne));
 407
 408   EXPECT_FALSE(
 409       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, -1))
 410           .match(Zero));
 411   EXPECT_FALSE(
 412       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, -1))
 413           .match(One));
 414   EXPECT_FALSE(
 415       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, -1))
 416           .match(NegOne));
 417 }
 418
 419 TEST_F(PatternMatchTest, SpecificIntSLE) {
 420   Type *IntTy = IRB.getInt32Ty();
 421   unsigned BitWidth = IntTy->getScalarSizeInBits();
 422
 423   Value *Zero = ConstantInt::get(IntTy, 0);
 424   Value *One = ConstantInt::get(IntTy, 1);
 425   Value *NegOne = ConstantInt::get(IntTy, -1);
 426
 427   EXPECT_TRUE(
 428       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 0))
 429           .match(Zero));
 430   EXPECT_FALSE(
 431       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 0))
 432           .match(One));
 433   EXPECT_TRUE(
 434       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 0))
 435           .match(NegOne));
 436
 437   EXPECT_TRUE(
 438       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 1))
 439           .match(Zero));
 440   EXPECT_TRUE(
 441       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 1))
 442           .match(One));
 443   EXPECT_TRUE(
 444       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 1))
 445           .match(NegOne));
 446
 447   EXPECT_FALSE(
 448       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, -1))
 449           .match(Zero));
 450   EXPECT_FALSE(
 451       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, -1))
 452           .match(One));
 453   EXPECT_TRUE(
 454       m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, -1))
 455           .match(NegOne));
 456 }
 457
 458 TEST_F(PatternMatchTest, Unless) {
 459   Value *X = IRB.CreateAdd(IRB.getInt32(1), IRB.getInt32(0));
 460
 461   EXPECT_TRUE(m_Add(m_One(), m_Zero()).match(X));
 462   EXPECT_FALSE(m_Add(m_Zero(), m_One()).match(X));
 463
 464   EXPECT_FALSE(m_Unless(m_Add(m_One(), m_Zero())).match(X));
 465   EXPECT_TRUE(m_Unless(m_Add(m_Zero(), m_One())).match(X));
 466
 467   EXPECT_TRUE(m_c_Add(m_One(), m_Zero()).match(X));
 468   EXPECT_TRUE(m_c_Add(m_Zero(), m_One()).match(X));
 469
 470   EXPECT_FALSE(m_Unless(m_c_Add(m_One(), m_Zero())).match(X));
 471   EXPECT_FALSE(m_Unless(m_c_Add(m_Zero(), m_One())).match(X));
 472 }
 473
 474 TEST_F(PatternMatchTest, Power2) {
 475   Value *C128 = IRB.getInt32(128);
 476   Value *CNeg128 = ConstantExpr::getNeg(cast<Constant>(C128));
 477
 478   EXPECT_TRUE(m_Power2().match(C128));
 479   EXPECT_FALSE(m_Power2().match(CNeg128));
 480
 481   EXPECT_FALSE(m_NegatedPower2().match(C128));
 482   EXPECT_TRUE(m_NegatedPower2().match(CNeg128));
 483
 484   Value *CIntMin = IRB.getInt64(APSInt::getSignedMinValue(64).getSExtValue());
 485   Value *CNegIntMin = ConstantExpr::getNeg(cast<Constant>(CIntMin));
 486
 487   EXPECT_TRUE(m_Power2().match(CIntMin));
 488   EXPECT_TRUE(m_Power2().match(CNegIntMin));
 489
 490   EXPECT_TRUE(m_NegatedPower2().match(CIntMin));
 491   EXPECT_TRUE(m_NegatedPower2().match(CNegIntMin));
 492 }
 493
 494 TEST_F(PatternMatchTest, CommutativeDeferredValue) {
 495   Value *X = IRB.getInt32(1);
 496   Value *Y = IRB.getInt32(2);
 497
 498   {
 499     Value *tX = X;
 500     EXPECT_TRUE(match(X, m_Deferred(tX)));
 501     EXPECT_FALSE(match(Y, m_Deferred(tX)));
 502   }
 503   {
 504     const Value *tX = X;
 505     EXPECT_TRUE(match(X, m_Deferred(tX)));
 506     EXPECT_FALSE(match(Y, m_Deferred(tX)));
 507   }
 508   {
 509     Value *const tX = X;
 510     EXPECT_TRUE(match(X, m_Deferred(tX)));
 511     EXPECT_FALSE(match(Y, m_Deferred(tX)));
 512   }
 513   {
 514     const Value *const tX = X;
 515     EXPECT_TRUE(match(X, m_Deferred(tX)));
 516     EXPECT_FALSE(match(Y, m_Deferred(tX)));
 517   }
 518
 519   {
 520     Value *tX = nullptr;
 521     EXPECT_TRUE(match(IRB.CreateAnd(X, X), m_And(m_Value(tX), m_Deferred(tX))));
 522     EXPECT_EQ(tX, X);
 523   }
 524   {
 525     Value *tX = nullptr;
 526     EXPECT_FALSE(
 527         match(IRB.CreateAnd(X, Y), m_c_And(m_Value(tX), m_Deferred(tX))));
 528   }
 529
 530   auto checkMatch = [X, Y](Value *Pattern) {
 531     Value *tX = nullptr, *tY = nullptr;
 532     EXPECT_TRUE(match(
 533         Pattern, m_c_And(m_Value(tX), m_c_And(m_Deferred(tX), m_Value(tY)))));
 534     EXPECT_EQ(tX, X);
 535     EXPECT_EQ(tY, Y);
 536   };
 537
 538   checkMatch(IRB.CreateAnd(X, IRB.CreateAnd(X, Y)));
 539   checkMatch(IRB.CreateAnd(X, IRB.CreateAnd(Y, X)));
 540   checkMatch(IRB.CreateAnd(IRB.CreateAnd(X, Y), X));
 541   checkMatch(IRB.CreateAnd(IRB.CreateAnd(Y, X), X));
 542 }
 543
 544 TEST_F(PatternMatchTest, FloatingPointOrderedMin) {
 545   Type *FltTy = IRB.getFloatTy();
 546   Value *L = ConstantFP::get(FltTy, 1.0);
 547   Value *R = ConstantFP::get(FltTy, 2.0);
 548   Value *MatchL, *MatchR;
 549
 550   // Test OLT.
 551   EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 552                   .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), L, R)));
 553   EXPECT_EQ(L, MatchL);
 554   EXPECT_EQ(R, MatchR);
 555
 556   // Test OLE.
 557   EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 558                   .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), L, R)));
 559   EXPECT_EQ(L, MatchL);
 560   EXPECT_EQ(R, MatchR);
 561
 562   // Test no match on OGE.
 563   EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 564                    .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), L, R)));
 565
 566   // Test no match on OGT.
 567   EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 568                    .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), L, R)));
 569
 570   // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
 571   // %cmp = fcmp oge L, R
 572   // %min = select %cmp R, L
 573   // Given L == NaN
 574   // the above is expanded to %cmp == false ==> %min = L
 575   // which is true for UnordFMin, not OrdFMin, so test that:
 576
 577   // [OU]GE with inverted select.
 578   EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 579                   .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), R, L)));
 580   EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 581                   .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), R, L)));
 582   EXPECT_EQ(L, MatchL);
 583   EXPECT_EQ(R, MatchR);
 584
 585   // [OU]GT with inverted select.
 586   EXPECT_FALSE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 587                   .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), R, L)));
 588   EXPECT_TRUE(m_OrdFMin(m_Value(MatchL), m_Value(MatchR))
 589                   .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), R, L)));
 590   EXPECT_EQ(L, MatchL);
 591   EXPECT_EQ(R, MatchR);
 592 }
 593
 594 TEST_F(PatternMatchTest, FloatingPointOrderedMax) {
 595   Type *FltTy = IRB.getFloatTy();
 596   Value *L = ConstantFP::get(FltTy, 1.0);
 597   Value *R = ConstantFP::get(FltTy, 2.0);
 598   Value *MatchL, *MatchR;
 599
 600   // Test OGT.
 601   EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 602                   .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), L, R)));
 603   EXPECT_EQ(L, MatchL);
 604   EXPECT_EQ(R, MatchR);
 605
 606   // Test OGE.
 607   EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 608                   .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), L, R)));
 609   EXPECT_EQ(L, MatchL);
 610   EXPECT_EQ(R, MatchR);
 611
 612   // Test no match on OLE.
 613   EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 614                    .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), L, R)));
 615
 616   // Test no match on OLT.
 617   EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 618                    .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), L, R)));
 619
 620
 621   // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
 622   // %cmp = fcmp ole L, R
 623   // %max = select %cmp, R, L
 624   // Given L == NaN,
 625   // the above is expanded to %cmp == false ==> %max == L
 626   // which is true for UnordFMax, not OrdFMax, so test that:
 627
 628   // [OU]LE with inverted select.
 629   EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 630                    .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), R, L)));
 631   EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 632                   .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), R, L)));
 633   EXPECT_EQ(L, MatchL);
 634   EXPECT_EQ(R, MatchR);
 635
 636   // [OUT]LT with inverted select.
 637   EXPECT_FALSE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 638                    .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), R, L)));
 639   EXPECT_TRUE(m_OrdFMax(m_Value(MatchL), m_Value(MatchR))
 640                   .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), R, L)));
 641   EXPECT_EQ(L, MatchL);
 642   EXPECT_EQ(R, MatchR);
 643 }
 644
 645 TEST_F(PatternMatchTest, FloatingPointUnorderedMin) {
 646   Type *FltTy = IRB.getFloatTy();
 647   Value *L = ConstantFP::get(FltTy, 1.0);
 648   Value *R = ConstantFP::get(FltTy, 2.0);
 649   Value *MatchL, *MatchR;
 650
 651   // Test ULT.
 652   EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 653                   .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), L, R)));
 654   EXPECT_EQ(L, MatchL);
 655   EXPECT_EQ(R, MatchR);
 656
 657   // Test ULE.
 658   EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 659                   .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), L, R)));
 660   EXPECT_EQ(L, MatchL);
 661   EXPECT_EQ(R, MatchR);
 662
 663   // Test no match on UGE.
 664   EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 665                    .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), L, R)));
 666
 667   // Test no match on UGT.
 668   EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 669                    .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), L, R)));
 670
 671   // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
 672   // %cmp = fcmp uge L, R
 673   // %min = select %cmp R, L
 674   // Given L == NaN
 675   // the above is expanded to %cmp == true ==> %min = R
 676   // which is true for OrdFMin, not UnordFMin, so test that:
 677
 678   // [UO]GE with inverted select.
 679   EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 680                   .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), R, L)));
 681   EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 682                   .match(IRB.CreateSelect(IRB.CreateFCmpOGE(L, R), R, L)));
 683   EXPECT_EQ(L, MatchL);
 684   EXPECT_EQ(R, MatchR);
 685
 686   // [UO]GT with inverted select.
 687   EXPECT_FALSE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 688                   .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), R, L)));
 689   EXPECT_TRUE(m_UnordFMin(m_Value(MatchL), m_Value(MatchR))
 690                   .match(IRB.CreateSelect(IRB.CreateFCmpOGT(L, R), R, L)));
 691   EXPECT_EQ(L, MatchL);
 692   EXPECT_EQ(R, MatchR);
 693 }
 694
 695 TEST_F(PatternMatchTest, FloatingPointUnorderedMax) {
 696   Type *FltTy = IRB.getFloatTy();
 697   Value *L = ConstantFP::get(FltTy, 1.0);
 698   Value *R = ConstantFP::get(FltTy, 2.0);
 699   Value *MatchL, *MatchR;
 700
 701   // Test UGT.
 702   EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 703                   .match(IRB.CreateSelect(IRB.CreateFCmpUGT(L, R), L, R)));
 704   EXPECT_EQ(L, MatchL);
 705   EXPECT_EQ(R, MatchR);
 706
 707   // Test UGE.
 708   EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 709                   .match(IRB.CreateSelect(IRB.CreateFCmpUGE(L, R), L, R)));
 710   EXPECT_EQ(L, MatchL);
 711   EXPECT_EQ(R, MatchR);
 712
 713   // Test no match on ULE.
 714   EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 715                    .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), L, R)));
 716
 717   // Test no match on ULT.
 718   EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 719                    .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), L, R)));
 720
 721   // Test inverted selects. Note, that this "inverts" the ordering, e.g.:
 722   // %cmp = fcmp ule L, R
 723   // %max = select %cmp R, L
 724   // Given L == NaN
 725   // the above is expanded to %cmp == true ==> %max = R
 726   // which is true for OrdFMax, not UnordFMax, so test that:
 727
 728   // [UO]LE with inverted select.
 729   EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 730                   .match(IRB.CreateSelect(IRB.CreateFCmpULE(L, R), R, L)));
 731   EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 732                   .match(IRB.CreateSelect(IRB.CreateFCmpOLE(L, R), R, L)));
 733   EXPECT_EQ(L, MatchL);
 734   EXPECT_EQ(R, MatchR);
 735
 736   // [UO]LT with inverted select.
 737   EXPECT_FALSE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 738                   .match(IRB.CreateSelect(IRB.CreateFCmpULT(L, R), R, L)));
 739   EXPECT_TRUE(m_UnordFMax(m_Value(MatchL), m_Value(MatchR))
 740                   .match(IRB.CreateSelect(IRB.CreateFCmpOLT(L, R), R, L)));
 741   EXPECT_EQ(L, MatchL);
 742   EXPECT_EQ(R, MatchR);
 743 }
 744
 745 TEST_F(PatternMatchTest, OverflowingBinOps) {
 746   Value *L = IRB.getInt32(1);
 747   Value *R = IRB.getInt32(2);
 748   Value *MatchL, *MatchR;
 749
 750   EXPECT_TRUE(
 751       m_NSWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWAdd(L, R)));
 752   EXPECT_EQ(L, MatchL);
 753   EXPECT_EQ(R, MatchR);
 754   MatchL = MatchR = nullptr;
 755   EXPECT_TRUE(
 756       m_NSWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWSub(L, R)));
 757   EXPECT_EQ(L, MatchL);
 758   EXPECT_EQ(R, MatchR);
 759   MatchL = MatchR = nullptr;
 760   EXPECT_TRUE(
 761       m_NSWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWMul(L, R)));
 762   EXPECT_EQ(L, MatchL);
 763   EXPECT_EQ(R, MatchR);
 764   MatchL = MatchR = nullptr;
 765   EXPECT_TRUE(m_NSWShl(m_Value(MatchL), m_Value(MatchR)).match(
 766       IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
 767   EXPECT_EQ(L, MatchL);
 768   EXPECT_EQ(R, MatchR);
 769
 770   EXPECT_TRUE(
 771       m_NUWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWAdd(L, R)));
 772   EXPECT_EQ(L, MatchL);
 773   EXPECT_EQ(R, MatchR);
 774   MatchL = MatchR = nullptr;
 775   EXPECT_TRUE(
 776       m_NUWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWSub(L, R)));
 777   EXPECT_EQ(L, MatchL);
 778   EXPECT_EQ(R, MatchR);
 779   MatchL = MatchR = nullptr;
 780   EXPECT_TRUE(
 781       m_NUWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWMul(L, R)));
 782   EXPECT_EQ(L, MatchL);
 783   EXPECT_EQ(R, MatchR);
 784   MatchL = MatchR = nullptr;
 785   EXPECT_TRUE(m_NUWShl(m_Value(MatchL), m_Value(MatchR)).match(
 786       IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
 787   EXPECT_EQ(L, MatchL);
 788   EXPECT_EQ(R, MatchR);
 789
 790   EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
 791   EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
 792   EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
 793   EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
 794   EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
 795   EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
 796   EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
 797   EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNUWMul(L, R)));
 798   EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
 799   EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
 800   EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(
 801       IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
 802   EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
 803
 804   EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
 805   EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
 806   EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
 807   EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
 808   EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
 809   EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
 810   EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
 811   EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNSWMul(L, R)));
 812   EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
 813   EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
 814   EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(
 815       IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
 816   EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
 817 }
 818
 819 TEST_F(PatternMatchTest, LoadStoreOps) {
 820   // Create this load/store sequence:
 821   //
 822   //  %p = alloca i32*
 823   //  %0 = load i32*, i32** %p
 824   //  store i32 42, i32* %0
 825
 826   Value *Alloca = IRB.CreateAlloca(IRB.getInt32Ty());
 827   Value *LoadInst = IRB.CreateLoad(IRB.getInt32Ty(), Alloca);
 828   Value *FourtyTwo = IRB.getInt32(42);
 829   Value *StoreInst = IRB.CreateStore(FourtyTwo, Alloca);
 830   Value *MatchLoad, *MatchStoreVal, *MatchStorePointer;
 831
 832   EXPECT_TRUE(m_Load(m_Value(MatchLoad)).match(LoadInst));
 833   EXPECT_EQ(Alloca, MatchLoad);
 834
 835   EXPECT_TRUE(m_Load(m_Specific(Alloca)).match(LoadInst));
 836
 837   EXPECT_FALSE(m_Load(m_Value(MatchLoad)).match(Alloca));
 838
 839   EXPECT_TRUE(m_Store(m_Value(MatchStoreVal), m_Value(MatchStorePointer))
 840                 .match(StoreInst));
 841   EXPECT_EQ(FourtyTwo, MatchStoreVal);
 842   EXPECT_EQ(Alloca, MatchStorePointer);
 843
 844   EXPECT_FALSE(m_Store(m_Value(MatchStoreVal), m_Value(MatchStorePointer))
 845                 .match(Alloca));
 846
 847   EXPECT_TRUE(m_Store(m_SpecificInt(42), m_Specific(Alloca))
 848                 .match(StoreInst));
 849   EXPECT_FALSE(m_Store(m_SpecificInt(42), m_Specific(FourtyTwo))
 850                 .match(StoreInst));
 851   EXPECT_FALSE(m_Store(m_SpecificInt(43), m_Specific(Alloca))
 852                 .match(StoreInst));
 853 }
 854
 855 TEST_F(PatternMatchTest, VectorOps) {
 856   // Build up small tree of vector operations
 857   //
 858   //   Val = 0 + 1
 859   //   Val2 = Val + 3
 860   //   VI1 = insertelement <2 x i8> undef, i8 1, i32 0 = <1, undef>
 861   //   VI2 = insertelement <2 x i8> %VI1, i8 %Val2, i8 %Val = <1, 4>
 862   //   VI3 = insertelement <2 x i8> %VI1, i8 %Val2, i32 1 = <1, 4>
 863   //   VI4 = insertelement <2 x i8> %VI1, i8 2, i8 %Val = <1, 2>
 864   //
 865   //   SI1 = shufflevector <2 x i8> %VI1, <2 x i8> undef, zeroinitializer
 866   //   SI2 = shufflevector <2 x i8> %VI3, <2 x i8> %VI4, <2 x i8> <i8 0, i8 2>
 867   //   SI3 = shufflevector <2 x i8> %VI3, <2 x i8> undef, zeroinitializer
 868   //   SI4 = shufflevector <2 x i8> %VI4, <2 x i8> undef, zeroinitializer
 869   //
 870   //   SP1 = VectorSplat(2, i8 2)
 871   //   SP2 = VectorSplat(2, i8 %Val)
 872   Type *VecTy = VectorType::get(IRB.getInt8Ty(), 2);
 873   Type *i32 = IRB.getInt32Ty();
 874   Type *i32VecTy = VectorType::get(i32, 2);
 875
 876   Value *Val = IRB.CreateAdd(IRB.getInt8(0), IRB.getInt8(1));
 877   Value *Val2 = IRB.CreateAdd(Val, IRB.getInt8(3));
 878
 879   SmallVector<Constant *, 2> VecElemIdxs;
 880   VecElemIdxs.push_back(ConstantInt::get(i32, 0));
 881   VecElemIdxs.push_back(ConstantInt::get(i32, 2));
 882   auto *IdxVec = ConstantVector::get(VecElemIdxs);
 883
 884   Value *UndefVec = UndefValue::get(VecTy);
 885   Value *VI1 = IRB.CreateInsertElement(UndefVec, IRB.getInt8(1), (uint64_t)0);
 886   Value *VI2 = IRB.CreateInsertElement(VI1, Val2, Val);
 887   Value *VI3 = IRB.CreateInsertElement(VI1, Val2, (uint64_t)1);
 888   Value *VI4 = IRB.CreateInsertElement(VI1, IRB.getInt8(2), Val);
 889
 890   Value *EX1 = IRB.CreateExtractElement(VI4, Val);
 891   Value *EX2 = IRB.CreateExtractElement(VI4, (uint64_t)0);
 892   Value *EX3 = IRB.CreateExtractElement(IdxVec, (uint64_t)1);
 893
 894   Value *Zero = ConstantAggregateZero::get(i32VecTy);
 895   Value *SI1 = IRB.CreateShuffleVector(VI1, UndefVec, Zero);
 896   Value *SI2 = IRB.CreateShuffleVector(VI3, VI4, IdxVec);
 897   Value *SI3 = IRB.CreateShuffleVector(VI3, UndefVec, Zero);
 898   Value *SI4 = IRB.CreateShuffleVector(VI4, UndefVec, Zero);
 899
 900   Value *SP1 = IRB.CreateVectorSplat(2, IRB.getInt8(2));
 901   Value *SP2 = IRB.CreateVectorSplat(2, Val);
 902
 903   Value *A = nullptr, *B = nullptr, *C = nullptr;
 904
 905   // Test matching insertelement
 906   EXPECT_TRUE(match(VI1, m_InsertElement(m_Value(), m_Value(), m_Value())));
 907   EXPECT_TRUE(
 908       match(VI1, m_InsertElement(m_Undef(), m_ConstantInt(), m_ConstantInt())));
 909   EXPECT_TRUE(
 910       match(VI1, m_InsertElement(m_Undef(), m_ConstantInt(), m_Zero())));
 911   EXPECT_TRUE(
 912       match(VI1, m_InsertElement(m_Undef(), m_SpecificInt(1), m_Zero())));
 913   EXPECT_TRUE(match(VI2, m_InsertElement(m_Value(), m_Value(), m_Value())));
 914   EXPECT_FALSE(
 915       match(VI2, m_InsertElement(m_Value(), m_Value(), m_ConstantInt())));
 916   EXPECT_FALSE(
 917       match(VI2, m_InsertElement(m_Value(), m_ConstantInt(), m_Value())));
 918   EXPECT_FALSE(match(VI2, m_InsertElement(m_Constant(), m_Value(), m_Value())));
 919   EXPECT_TRUE(match(VI3, m_InsertElement(m_Value(A), m_Value(B), m_Value(C))));
 920   EXPECT_TRUE(A == VI1);
 921   EXPECT_TRUE(B == Val2);
 922   EXPECT_TRUE(isa<ConstantInt>(C));
 923   A = B = C = nullptr; // reset
 924
 925   // Test matching extractelement
 926   EXPECT_TRUE(match(EX1, m_ExtractElement(m_Value(A), m_Value(B))));
 927   EXPECT_TRUE(A == VI4);
 928   EXPECT_TRUE(B == Val);
 929   A = B = C = nullptr; // reset
 930   EXPECT_FALSE(match(EX1, m_ExtractElement(m_Value(), m_ConstantInt())));
 931   EXPECT_TRUE(match(EX2, m_ExtractElement(m_Value(), m_ConstantInt())));
 932   EXPECT_TRUE(match(EX3, m_ExtractElement(m_Constant(), m_ConstantInt())));
 933
 934   // Test matching shufflevector
 935   EXPECT_TRUE(match(SI1, m_ShuffleVector(m_Value(), m_Undef(), m_Zero())));
 936   EXPECT_TRUE(match(SI2, m_ShuffleVector(m_Value(A), m_Value(B), m_Value(C))));
 937   EXPECT_TRUE(A == VI3);
 938   EXPECT_TRUE(B == VI4);
 939   EXPECT_TRUE(C == IdxVec);
 940   A = B = C = nullptr; // reset
 941
 942   // Test matching the vector splat pattern
 943   EXPECT_TRUE(match(
 944       SI1,
 945       m_ShuffleVector(m_InsertElement(m_Undef(), m_SpecificInt(1), m_Zero()),
 946                       m_Undef(), m_Zero())));
 947   EXPECT_FALSE(match(
 948       SI3, m_ShuffleVector(m_InsertElement(m_Undef(), m_Value(), m_Zero()),
 949                            m_Undef(), m_Zero())));
 950   EXPECT_FALSE(match(
 951       SI4, m_ShuffleVector(m_InsertElement(m_Undef(), m_Value(), m_Zero()),
 952                            m_Undef(), m_Zero())));
 953   EXPECT_TRUE(match(
 954       SP1,
 955       m_ShuffleVector(m_InsertElement(m_Undef(), m_SpecificInt(2), m_Zero()),
 956                       m_Undef(), m_Zero())));
 957   EXPECT_TRUE(match(
 958       SP2, m_ShuffleVector(m_InsertElement(m_Undef(), m_Value(A), m_Zero()),
 959                            m_Undef(), m_Zero())));
 960   EXPECT_TRUE(A == Val);
 961 }
 962
 963 TEST_F(PatternMatchTest, VectorUndefInt) {
 964   Type *ScalarTy = IRB.getInt8Ty();
 965   Type *VectorTy = VectorType::get(ScalarTy, 4);
 966   Constant *ScalarUndef = UndefValue::get(ScalarTy);
 967   Constant *VectorUndef = UndefValue::get(VectorTy);
 968   Constant *ScalarZero = Constant::getNullValue(ScalarTy);
 969   Constant *VectorZero = Constant::getNullValue(VectorTy);
 970
 971   SmallVector<Constant *, 4> Elems;
 972   Elems.push_back(ScalarUndef);
 973   Elems.push_back(ScalarZero);
 974   Elems.push_back(ScalarUndef);
 975   Elems.push_back(ScalarZero);
 976   Constant *VectorZeroUndef = ConstantVector::get(Elems);
 977
 978   EXPECT_TRUE(match(ScalarUndef, m_Undef()));
 979   EXPECT_TRUE(match(VectorUndef, m_Undef()));
 980   EXPECT_FALSE(match(ScalarZero, m_Undef()));
 981   EXPECT_FALSE(match(VectorZero, m_Undef()));
 982   EXPECT_FALSE(match(VectorZeroUndef, m_Undef()));
 983
 984   EXPECT_FALSE(match(ScalarUndef, m_Zero()));
 985   EXPECT_FALSE(match(VectorUndef, m_Zero()));
 986   EXPECT_TRUE(match(ScalarZero, m_Zero()));
 987   EXPECT_TRUE(match(VectorZero, m_Zero()));
 988   EXPECT_TRUE(match(VectorZeroUndef, m_Zero()));
 989 }
 990
 991 TEST_F(PatternMatchTest, VectorUndefFloat) {
 992   Type *ScalarTy = IRB.getFloatTy();
 993   Type *VectorTy = VectorType::get(ScalarTy, 4);
 994   Constant *ScalarUndef = UndefValue::get(ScalarTy);
 995   Constant *VectorUndef = UndefValue::get(VectorTy);
 996   Constant *ScalarZero = Constant::getNullValue(ScalarTy);
 997   Constant *VectorZero = Constant::getNullValue(VectorTy);
 998
 999   SmallVector<Constant *, 4> Elems;
1000   Elems.push_back(ScalarUndef);
1001   Elems.push_back(ScalarZero);
1002   Elems.push_back(ScalarUndef);
1003   Elems.push_back(ScalarZero);
1004   Constant *VectorZeroUndef = ConstantVector::get(Elems);
1005
1006   EXPECT_TRUE(match(ScalarUndef, m_Undef()));
1007   EXPECT_TRUE(match(VectorUndef, m_Undef()));
1008   EXPECT_FALSE(match(ScalarZero, m_Undef()));
1009   EXPECT_FALSE(match(VectorZero, m_Undef()));
1010   EXPECT_FALSE(match(VectorZeroUndef, m_Undef()));
1011
1012   EXPECT_FALSE(match(ScalarUndef, m_AnyZeroFP()));
1013   EXPECT_FALSE(match(VectorUndef, m_AnyZeroFP()));
1014   EXPECT_TRUE(match(ScalarZero, m_AnyZeroFP()));
1015   EXPECT_TRUE(match(VectorZero, m_AnyZeroFP()));
1016   EXPECT_TRUE(match(VectorZeroUndef, m_AnyZeroFP()));
1017 }
1018
1019 TEST_F(PatternMatchTest, FloatingPointFNeg) {
1020   Type *FltTy = IRB.getFloatTy();
1021   Value *One = ConstantFP::get(FltTy, 1.0);
1022   Value *Z = ConstantFP::get(FltTy, 0.0);
1023   Value *NZ = ConstantFP::get(FltTy, -0.0);
1024   Value *V = IRB.CreateFNeg(One);
1025   Value *V1 = IRB.CreateFSub(NZ, One);
1026   Value *V2 = IRB.CreateFSub(Z, One);
1027   Value *V3 = IRB.CreateFAdd(NZ, One);
1028   Value *Match;
1029
1030   // Test FNeg(1.0)
1031   EXPECT_TRUE(match(V, m_FNeg(m_Value(Match))));
1032   EXPECT_EQ(One, Match);
1033
1034   // Test FSub(-0.0, 1.0)
1035   EXPECT_TRUE(match(V1, m_FNeg(m_Value(Match))));
1036   EXPECT_EQ(One, Match);
1037
1038   // Test FSub(0.0, 1.0)
1039   EXPECT_FALSE(match(V2, m_FNeg(m_Value(Match))));
1040   cast<Instruction>(V2)->setHasNoSignedZeros(true);
1041   EXPECT_TRUE(match(V2, m_FNeg(m_Value(Match))));
1042   EXPECT_EQ(One, Match);
1043
1044   // Test FAdd(-0.0, 1.0)
1045   EXPECT_FALSE(match(V3, m_FNeg(m_Value(Match))));
1046 }
1047
1048 template <typename T> struct MutableConstTest : PatternMatchTest { };
1049
1050 typedef ::testing::Types<std::tuple<Value*, Instruction*>,
1051                          std::tuple<const Value*, const Instruction *>>
1052     MutableConstTestTypes;
1053 TYPED_TEST_CASE(MutableConstTest, MutableConstTestTypes);
1054
1055 TYPED_TEST(MutableConstTest, ICmp) {
1056   auto &IRB = PatternMatchTest::IRB;
1057
1058   typedef typename std::tuple_element<0, TypeParam>::type ValueType;
1059   typedef typename std::tuple_element<1, TypeParam>::type InstructionType;
1060
1061   Value *L = IRB.getInt32(1);
1062   Value *R = IRB.getInt32(2);
1063   ICmpInst::Predicate Pred = ICmpInst::ICMP_UGT;
1064
1065   ValueType MatchL;
1066   ValueType MatchR;
1067   ICmpInst::Predicate MatchPred;
1068
1069   EXPECT_TRUE(m_ICmp(MatchPred, m_Value(MatchL), m_Value(MatchR))
1070               .match((InstructionType)IRB.CreateICmp(Pred, L, R)));
1071   EXPECT_EQ(L, MatchL);
1072   EXPECT_EQ(R, MatchR);
1073 }
1074
1075 } // anonymous namespace.