unittests/IR/InstructionsTest.cpp

   1 //===- llvm/unittest/IR/InstructionsTest.cpp - Instructions unit tests ----===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/IR/Instructions.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/LLVMContext.h"
  20 #include "llvm/IR/MDBuilder.h"
  21 #include "llvm/IR/Module.h"
  22 #include "llvm/IR/Operator.h"
  23 #include "gtest/gtest.h"
  24 #include <memory>
  25
  26 namespace llvm {
  27 namespace {
  28
  29 TEST(InstructionsTest, ReturnInst) {
  30   LLVMContext &C(getGlobalContext());
  31
  32   // test for PR6589
  33   const ReturnInst* r0 = ReturnInst::Create(C);
  34   EXPECT_EQ(r0->getNumOperands(), 0U);
  35   EXPECT_EQ(r0->op_begin(), r0->op_end());
  36
  37   IntegerType* Int1 = IntegerType::get(C, 1);
  38   Constant* One = ConstantInt::get(Int1, 1, true);
  39   const ReturnInst* r1 = ReturnInst::Create(C, One);
  40   EXPECT_EQ(1U, r1->getNumOperands());
  41   User::const_op_iterator b(r1->op_begin());
  42   EXPECT_NE(r1->op_end(), b);
  43   EXPECT_EQ(One, *b);
  44   EXPECT_EQ(One, r1->getOperand(0));
  45   ++b;
  46   EXPECT_EQ(r1->op_end(), b);
  47
  48   // clean up
  49   delete r0;
  50   delete r1;
  51 }
  52
  53 // Test fixture that provides a module and a single function within it. Useful
  54 // for tests that need to refer to the function in some way.
  55 class ModuleWithFunctionTest : public testing::Test {
  56 protected:
  57   ModuleWithFunctionTest() : M(new Module("MyModule", Ctx)) {
  58     FArgTypes.push_back(Type::getInt8Ty(Ctx));
  59     FArgTypes.push_back(Type::getInt32Ty(Ctx));
  60     FArgTypes.push_back(Type::getInt64Ty(Ctx));
  61     FunctionType *FTy =
  62         FunctionType::get(Type::getVoidTy(Ctx), FArgTypes, false);
  63     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
  64   }
  65
  66   LLVMContext Ctx;
  67   std::unique_ptr<Module> M;
  68   SmallVector<Type *, 3> FArgTypes;
  69   Function *F;
  70 };
  71
  72 TEST_F(ModuleWithFunctionTest, CallInst) {
  73   Value *Args[] = {ConstantInt::get(Type::getInt8Ty(Ctx), 20),
  74                    ConstantInt::get(Type::getInt32Ty(Ctx), 9999),
  75                    ConstantInt::get(Type::getInt64Ty(Ctx), 42)};
  76   std::unique_ptr<CallInst> Call(CallInst::Create(F, Args));
  77
  78   // Make sure iteration over a call's arguments works as expected.
  79   unsigned Idx = 0;
  80   for (Value *Arg : Call->arg_operands()) {
  81     EXPECT_EQ(FArgTypes[Idx], Arg->getType());
  82     EXPECT_EQ(Call->getArgOperand(Idx)->getType(), Arg->getType());
  83     Idx++;
  84   }
  85 }
  86
  87 TEST_F(ModuleWithFunctionTest, InvokeInst) {
  88   BasicBlock *BB1 = BasicBlock::Create(Ctx, "", F);
  89   BasicBlock *BB2 = BasicBlock::Create(Ctx, "", F);
  90
  91   Value *Args[] = {ConstantInt::get(Type::getInt8Ty(Ctx), 20),
  92                    ConstantInt::get(Type::getInt32Ty(Ctx), 9999),
  93                    ConstantInt::get(Type::getInt64Ty(Ctx), 42)};
  94   std::unique_ptr<InvokeInst> Invoke(InvokeInst::Create(F, BB1, BB2, Args));
  95
  96   // Make sure iteration over invoke's arguments works as expected.
  97   unsigned Idx = 0;
  98   for (Value *Arg : Invoke->arg_operands()) {
  99     EXPECT_EQ(FArgTypes[Idx], Arg->getType());
 100     EXPECT_EQ(Invoke->getArgOperand(Idx)->getType(), Arg->getType());
 101     Idx++;
 102   }
 103 }
 104
 105 TEST(InstructionsTest, BranchInst) {
 106   LLVMContext &C(getGlobalContext());
 107
 108   // Make a BasicBlocks
 109   BasicBlock* bb0 = BasicBlock::Create(C);
 110   BasicBlock* bb1 = BasicBlock::Create(C);
 111
 112   // Mandatory BranchInst
 113   const BranchInst* b0 = BranchInst::Create(bb0);
 114
 115   EXPECT_TRUE(b0->isUnconditional());
 116   EXPECT_FALSE(b0->isConditional());
 117   EXPECT_EQ(1U, b0->getNumSuccessors());
 118
 119   // check num operands
 120   EXPECT_EQ(1U, b0->getNumOperands());
 121
 122   EXPECT_NE(b0->op_begin(), b0->op_end());
 123   EXPECT_EQ(b0->op_end(), std::next(b0->op_begin()));
 124
 125   EXPECT_EQ(b0->op_end(), std::next(b0->op_begin()));
 126
 127   IntegerType* Int1 = IntegerType::get(C, 1);
 128   Constant* One = ConstantInt::get(Int1, 1, true);
 129
 130   // Conditional BranchInst
 131   BranchInst* b1 = BranchInst::Create(bb0, bb1, One);
 132
 133   EXPECT_FALSE(b1->isUnconditional());
 134   EXPECT_TRUE(b1->isConditional());
 135   EXPECT_EQ(2U, b1->getNumSuccessors());
 136
 137   // check num operands
 138   EXPECT_EQ(3U, b1->getNumOperands());
 139
 140   User::const_op_iterator b(b1->op_begin());
 141
 142   // check COND
 143   EXPECT_NE(b, b1->op_end());
 144   EXPECT_EQ(One, *b);
 145   EXPECT_EQ(One, b1->getOperand(0));
 146   EXPECT_EQ(One, b1->getCondition());
 147   ++b;
 148
 149   // check ELSE
 150   EXPECT_EQ(bb1, *b);
 151   EXPECT_EQ(bb1, b1->getOperand(1));
 152   EXPECT_EQ(bb1, b1->getSuccessor(1));
 153   ++b;
 154
 155   // check THEN
 156   EXPECT_EQ(bb0, *b);
 157   EXPECT_EQ(bb0, b1->getOperand(2));
 158   EXPECT_EQ(bb0, b1->getSuccessor(0));
 159   ++b;
 160
 161   EXPECT_EQ(b1->op_end(), b);
 162
 163   // clean up
 164   delete b0;
 165   delete b1;
 166
 167   delete bb0;
 168   delete bb1;
 169 }
 170
 171 TEST(InstructionsTest, CastInst) {
 172   LLVMContext &C(getGlobalContext());
 173
 174   Type *Int8Ty = Type::getInt8Ty(C);
 175   Type *Int16Ty = Type::getInt16Ty(C);
 176   Type *Int32Ty = Type::getInt32Ty(C);
 177   Type *Int64Ty = Type::getInt64Ty(C);
 178   Type *V8x8Ty = VectorType::get(Int8Ty, 8);
 179   Type *V8x64Ty = VectorType::get(Int64Ty, 8);
 180   Type *X86MMXTy = Type::getX86_MMXTy(C);
 181
 182   Type *HalfTy = Type::getHalfTy(C);
 183   Type *FloatTy = Type::getFloatTy(C);
 184   Type *DoubleTy = Type::getDoubleTy(C);
 185
 186   Type *V2Int32Ty = VectorType::get(Int32Ty, 2);
 187   Type *V2Int64Ty = VectorType::get(Int64Ty, 2);
 188   Type *V4Int16Ty = VectorType::get(Int16Ty, 4);
 189
 190   Type *Int32PtrTy = PointerType::get(Int32Ty, 0);
 191   Type *Int64PtrTy = PointerType::get(Int64Ty, 0);
 192
 193   Type *Int32PtrAS1Ty = PointerType::get(Int32Ty, 1);
 194   Type *Int64PtrAS1Ty = PointerType::get(Int64Ty, 1);
 195
 196   Type *V2Int32PtrAS1Ty = VectorType::get(Int32PtrAS1Ty, 2);
 197   Type *V2Int64PtrAS1Ty = VectorType::get(Int64PtrAS1Ty, 2);
 198   Type *V4Int32PtrAS1Ty = VectorType::get(Int32PtrAS1Ty, 4);
 199   Type *V4Int64PtrAS1Ty = VectorType::get(Int64PtrAS1Ty, 4);
 200
 201   Type *V2Int64PtrTy = VectorType::get(Int64PtrTy, 2);
 202   Type *V2Int32PtrTy = VectorType::get(Int32PtrTy, 2);
 203   Type *V4Int32PtrTy = VectorType::get(Int32PtrTy, 4);
 204
 205   const Constant* c8 = Constant::getNullValue(V8x8Ty);
 206   const Constant* c64 = Constant::getNullValue(V8x64Ty);
 207
 208   const Constant *v2ptr32 = Constant::getNullValue(V2Int32PtrTy);
 209
 210   EXPECT_TRUE(CastInst::isCastable(V8x8Ty, X86MMXTy));
 211   EXPECT_TRUE(CastInst::isCastable(X86MMXTy, V8x8Ty));
 212   EXPECT_FALSE(CastInst::isCastable(Int64Ty, X86MMXTy));
 213   EXPECT_TRUE(CastInst::isCastable(V8x64Ty, V8x8Ty));
 214   EXPECT_TRUE(CastInst::isCastable(V8x8Ty, V8x64Ty));
 215   EXPECT_EQ(CastInst::Trunc, CastInst::getCastOpcode(c64, true, V8x8Ty, true));
 216   EXPECT_EQ(CastInst::SExt, CastInst::getCastOpcode(c8, true, V8x64Ty, true));
 217
 218   EXPECT_FALSE(CastInst::isBitCastable(V8x8Ty, X86MMXTy));
 219   EXPECT_FALSE(CastInst::isBitCastable(X86MMXTy, V8x8Ty));
 220   EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, X86MMXTy));
 221   EXPECT_FALSE(CastInst::isBitCastable(V8x64Ty, V8x8Ty));
 222   EXPECT_FALSE(CastInst::isBitCastable(V8x8Ty, V8x64Ty));
 223
 224   // Check address space casts are rejected since we don't know the sizes here
 225   EXPECT_FALSE(CastInst::isBitCastable(Int32PtrTy, Int32PtrAS1Ty));
 226   EXPECT_FALSE(CastInst::isBitCastable(Int32PtrAS1Ty, Int32PtrTy));
 227   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, V2Int32PtrAS1Ty));
 228   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V2Int32PtrTy));
 229   EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V2Int64PtrAS1Ty));
 230   EXPECT_TRUE(CastInst::isCastable(V2Int32PtrAS1Ty, V2Int32PtrTy));
 231   EXPECT_EQ(CastInst::AddrSpaceCast, CastInst::getCastOpcode(v2ptr32, true,
 232                                                              V2Int32PtrAS1Ty,
 233                                                              true));
 234
 235   // Test mismatched number of elements for pointers
 236   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V4Int64PtrAS1Ty));
 237   EXPECT_FALSE(CastInst::isBitCastable(V4Int64PtrAS1Ty, V2Int32PtrAS1Ty));
 238   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V4Int32PtrAS1Ty));
 239   EXPECT_FALSE(CastInst::isBitCastable(Int32PtrTy, V2Int32PtrTy));
 240   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, Int32PtrTy));
 241
 242   EXPECT_TRUE(CastInst::isBitCastable(Int32PtrTy, Int64PtrTy));
 243   EXPECT_FALSE(CastInst::isBitCastable(DoubleTy, FloatTy));
 244   EXPECT_FALSE(CastInst::isBitCastable(FloatTy, DoubleTy));
 245   EXPECT_TRUE(CastInst::isBitCastable(FloatTy, FloatTy));
 246   EXPECT_TRUE(CastInst::isBitCastable(FloatTy, FloatTy));
 247   EXPECT_TRUE(CastInst::isBitCastable(FloatTy, Int32Ty));
 248   EXPECT_TRUE(CastInst::isBitCastable(Int16Ty, HalfTy));
 249   EXPECT_TRUE(CastInst::isBitCastable(Int32Ty, FloatTy));
 250   EXPECT_TRUE(CastInst::isBitCastable(V2Int32Ty, Int64Ty));
 251
 252   EXPECT_TRUE(CastInst::isBitCastable(V2Int32Ty, V4Int16Ty));
 253   EXPECT_FALSE(CastInst::isBitCastable(Int32Ty, Int64Ty));
 254   EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, Int32Ty));
 255
 256   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, Int64Ty));
 257   EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, V2Int32PtrTy));
 258   EXPECT_TRUE(CastInst::isBitCastable(V2Int64PtrTy, V2Int32PtrTy));
 259   EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrTy, V2Int64PtrTy));
 260   EXPECT_FALSE(CastInst::isBitCastable(V2Int32Ty, V2Int64Ty));
 261   EXPECT_FALSE(CastInst::isBitCastable(V2Int64Ty, V2Int32Ty));
 262
 263
 264   EXPECT_FALSE(CastInst::castIsValid(Instruction::BitCast,
 265                                      Constant::getNullValue(V4Int32PtrTy),
 266                                      V2Int32PtrTy));
 267   EXPECT_FALSE(CastInst::castIsValid(Instruction::BitCast,
 268                                      Constant::getNullValue(V2Int32PtrTy),
 269                                      V4Int32PtrTy));
 270
 271   EXPECT_FALSE(CastInst::castIsValid(Instruction::AddrSpaceCast,
 272                                      Constant::getNullValue(V4Int32PtrAS1Ty),
 273                                      V2Int32PtrTy));
 274   EXPECT_FALSE(CastInst::castIsValid(Instruction::AddrSpaceCast,
 275                                      Constant::getNullValue(V2Int32PtrTy),
 276                                      V4Int32PtrAS1Ty));
 277
 278
 279   // Check that assertion is not hit when creating a cast with a vector of
 280   // pointers
 281   // First form
 282   BasicBlock *BB = BasicBlock::Create(C);
 283   Constant *NullV2I32Ptr = Constant::getNullValue(V2Int32PtrTy);
 284   CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty, "foo", BB);
 285
 286   // Second form
 287   CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty);
 288 }
 289
 290 TEST(InstructionsTest, VectorGep) {
 291   LLVMContext &C(getGlobalContext());
 292
 293   // Type Definitions
 294   Type *I8Ty = IntegerType::get(C, 8);
 295   Type *I32Ty = IntegerType::get(C, 32);
 296   PointerType *Ptri8Ty = PointerType::get(I8Ty, 0);
 297   PointerType *Ptri32Ty = PointerType::get(I32Ty, 0);
 298
 299   VectorType *V2xi8PTy = VectorType::get(Ptri8Ty, 2);
 300   VectorType *V2xi32PTy = VectorType::get(Ptri32Ty, 2);
 301
 302   // Test different aspects of the vector-of-pointers type
 303   // and GEPs which use this type.
 304   ConstantInt *Ci32a = ConstantInt::get(C, APInt(32, 1492));
 305   ConstantInt *Ci32b = ConstantInt::get(C, APInt(32, 1948));
 306   std::vector<Constant*> ConstVa(2, Ci32a);
 307   std::vector<Constant*> ConstVb(2, Ci32b);
 308   Constant *C2xi32a = ConstantVector::get(ConstVa);
 309   Constant *C2xi32b = ConstantVector::get(ConstVb);
 310
 311   CastInst *PtrVecA = new IntToPtrInst(C2xi32a, V2xi32PTy);
 312   CastInst *PtrVecB = new IntToPtrInst(C2xi32b, V2xi32PTy);
 313
 314   ICmpInst *ICmp0 = new ICmpInst(ICmpInst::ICMP_SGT, PtrVecA, PtrVecB);
 315   ICmpInst *ICmp1 = new ICmpInst(ICmpInst::ICMP_ULT, PtrVecA, PtrVecB);
 316   EXPECT_NE(ICmp0, ICmp1); // suppress warning.
 317
 318   BasicBlock* BB0 = BasicBlock::Create(C);
 319   // Test InsertAtEnd ICmpInst constructor.
 320   ICmpInst *ICmp2 = new ICmpInst(*BB0, ICmpInst::ICMP_SGE, PtrVecA, PtrVecB);
 321   EXPECT_NE(ICmp0, ICmp2); // suppress warning.
 322
 323   GetElementPtrInst *Gep0 = GetElementPtrInst::Create(I32Ty, PtrVecA, C2xi32a);
 324   GetElementPtrInst *Gep1 = GetElementPtrInst::Create(I32Ty, PtrVecA, C2xi32b);
 325   GetElementPtrInst *Gep2 = GetElementPtrInst::Create(I32Ty, PtrVecB, C2xi32a);
 326   GetElementPtrInst *Gep3 = GetElementPtrInst::Create(I32Ty, PtrVecB, C2xi32b);
 327
 328   CastInst *BTC0 = new BitCastInst(Gep0, V2xi8PTy);
 329   CastInst *BTC1 = new BitCastInst(Gep1, V2xi8PTy);
 330   CastInst *BTC2 = new BitCastInst(Gep2, V2xi8PTy);
 331   CastInst *BTC3 = new BitCastInst(Gep3, V2xi8PTy);
 332
 333   Value *S0 = BTC0->stripPointerCasts();
 334   Value *S1 = BTC1->stripPointerCasts();
 335   Value *S2 = BTC2->stripPointerCasts();
 336   Value *S3 = BTC3->stripPointerCasts();
 337
 338   EXPECT_NE(S0, Gep0);
 339   EXPECT_NE(S1, Gep1);
 340   EXPECT_NE(S2, Gep2);
 341   EXPECT_NE(S3, Gep3);
 342
 343   int64_t Offset;
 344   DataLayout TD("e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3"
 345                 "2:32:32-f64:64:64-v64:64:64-v128:128:128-a:0:64-s:64:64-f80"
 346                 ":128:128-n8:16:32:64-S128");
 347   // Make sure we don't crash
 348   GetPointerBaseWithConstantOffset(Gep0, Offset, TD);
 349   GetPointerBaseWithConstantOffset(Gep1, Offset, TD);
 350   GetPointerBaseWithConstantOffset(Gep2, Offset, TD);
 351   GetPointerBaseWithConstantOffset(Gep3, Offset, TD);
 352
 353   // Gep of Geps
 354   GetElementPtrInst *GepII0 = GetElementPtrInst::Create(I32Ty, Gep0, C2xi32b);
 355   GetElementPtrInst *GepII1 = GetElementPtrInst::Create(I32Ty, Gep1, C2xi32a);
 356   GetElementPtrInst *GepII2 = GetElementPtrInst::Create(I32Ty, Gep2, C2xi32b);
 357   GetElementPtrInst *GepII3 = GetElementPtrInst::Create(I32Ty, Gep3, C2xi32a);
 358
 359   EXPECT_EQ(GepII0->getNumIndices(), 1u);
 360   EXPECT_EQ(GepII1->getNumIndices(), 1u);
 361   EXPECT_EQ(GepII2->getNumIndices(), 1u);
 362   EXPECT_EQ(GepII3->getNumIndices(), 1u);
 363
 364   EXPECT_FALSE(GepII0->hasAllZeroIndices());
 365   EXPECT_FALSE(GepII1->hasAllZeroIndices());
 366   EXPECT_FALSE(GepII2->hasAllZeroIndices());
 367   EXPECT_FALSE(GepII3->hasAllZeroIndices());
 368
 369   delete GepII0;
 370   delete GepII1;
 371   delete GepII2;
 372   delete GepII3;
 373
 374   delete BTC0;
 375   delete BTC1;
 376   delete BTC2;
 377   delete BTC3;
 378
 379   delete Gep0;
 380   delete Gep1;
 381   delete Gep2;
 382   delete Gep3;
 383
 384   ICmp2->eraseFromParent();
 385   delete BB0;
 386
 387   delete ICmp0;
 388   delete ICmp1;
 389   delete PtrVecA;
 390   delete PtrVecB;
 391 }
 392
 393 TEST(InstructionsTest, FPMathOperator) {
 394   LLVMContext &Context = getGlobalContext();
 395   IRBuilder<> Builder(Context);
 396   MDBuilder MDHelper(Context);
 397   Instruction *I = Builder.CreatePHI(Builder.getDoubleTy(), 0);
 398   MDNode *MD1 = MDHelper.createFPMath(1.0);
 399   Value *V1 = Builder.CreateFAdd(I, I, "", MD1);
 400   EXPECT_TRUE(isa<FPMathOperator>(V1));
 401   FPMathOperator *O1 = cast<FPMathOperator>(V1);
 402   EXPECT_EQ(O1->getFPAccuracy(), 1.0);
 403   delete V1;
 404   delete I;
 405 }
 406
 407
 408 TEST(InstructionsTest, isEliminableCastPair) {
 409   LLVMContext &C(getGlobalContext());
 410
 411   Type* Int16Ty = Type::getInt16Ty(C);
 412   Type* Int32Ty = Type::getInt32Ty(C);
 413   Type* Int64Ty = Type::getInt64Ty(C);
 414   Type* Int64PtrTy = Type::getInt64PtrTy(C);
 415
 416   // Source and destination pointers have same size -> bitcast.
 417   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
 418                                            CastInst::IntToPtr,
 419                                            Int64PtrTy, Int64Ty, Int64PtrTy,
 420                                            Int32Ty, nullptr, Int32Ty),
 421             CastInst::BitCast);
 422
 423   // Source and destination have unknown sizes, but the same address space and
 424   // the intermediate int is the maximum pointer size -> bitcast
 425   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
 426                                            CastInst::IntToPtr,
 427                                            Int64PtrTy, Int64Ty, Int64PtrTy,
 428                                            nullptr, nullptr, nullptr),
 429             CastInst::BitCast);
 430
 431   // Source and destination have unknown sizes, but the same address space and
 432   // the intermediate int is not the maximum pointer size -> nothing
 433   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
 434                                            CastInst::IntToPtr,
 435                                            Int64PtrTy, Int32Ty, Int64PtrTy,
 436                                            nullptr, nullptr, nullptr),
 437             0U);
 438
 439   // Middle pointer big enough -> bitcast.
 440   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
 441                                            CastInst::PtrToInt,
 442                                            Int64Ty, Int64PtrTy, Int64Ty,
 443                                            nullptr, Int64Ty, nullptr),
 444             CastInst::BitCast);
 445
 446   // Middle pointer too small -> fail.
 447   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
 448                                            CastInst::PtrToInt,
 449                                            Int64Ty, Int64PtrTy, Int64Ty,
 450                                            nullptr, Int32Ty, nullptr),
 451             0U);
 452
 453   // Test that we don't eliminate bitcasts between different address spaces,
 454   // or if we don't have available pointer size information.
 455   DataLayout DL("e-p:32:32:32-p1:16:16:16-p2:64:64:64-i1:8:8-i8:8:8-i16:16:16"
 456                 "-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64"
 457                 "-v128:128:128-a:0:64-s:64:64-f80:128:128-n8:16:32:64-S128");
 458
 459   Type* Int64PtrTyAS1 = Type::getInt64PtrTy(C, 1);
 460   Type* Int64PtrTyAS2 = Type::getInt64PtrTy(C, 2);
 461
 462   IntegerType *Int16SizePtr = DL.getIntPtrType(C, 1);
 463   IntegerType *Int64SizePtr = DL.getIntPtrType(C, 2);
 464
 465   // Cannot simplify inttoptr, addrspacecast
 466   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
 467                                            CastInst::AddrSpaceCast,
 468                                            Int16Ty, Int64PtrTyAS1, Int64PtrTyAS2,
 469                                            nullptr, Int16SizePtr, Int64SizePtr),
 470             0U);
 471
 472   // Cannot simplify addrspacecast, ptrtoint
 473   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::AddrSpaceCast,
 474                                            CastInst::PtrToInt,
 475                                            Int64PtrTyAS1, Int64PtrTyAS2, Int16Ty,
 476                                            Int64SizePtr, Int16SizePtr, nullptr),
 477             0U);
 478
 479   // Pass since the bitcast address spaces are the same
 480   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
 481                                            CastInst::BitCast,
 482                                            Int16Ty, Int64PtrTyAS1, Int64PtrTyAS1,
 483                                            nullptr, nullptr, nullptr),
 484             CastInst::IntToPtr);
 485
 486 }
 487
 488 TEST(InstructionsTest, CloneCall) {
 489   LLVMContext &C(getGlobalContext());
 490   Type *Int32Ty = Type::getInt32Ty(C);
 491   Type *ArgTys[] = {Int32Ty, Int32Ty, Int32Ty};
 492   Type *FnTy = FunctionType::get(Int32Ty, ArgTys, /*isVarArg=*/false);
 493   Value *Callee = Constant::getNullValue(FnTy->getPointerTo());
 494   Value *Args[] = {
 495     ConstantInt::get(Int32Ty, 1),
 496     ConstantInt::get(Int32Ty, 2),
 497     ConstantInt::get(Int32Ty, 3)
 498   };
 499   std::unique_ptr<CallInst> Call(CallInst::Create(Callee, Args, "result"));
 500
 501   // Test cloning the tail call kind.
 502   CallInst::TailCallKind Kinds[] = {CallInst::TCK_None, CallInst::TCK_Tail,
 503                                     CallInst::TCK_MustTail};
 504   for (CallInst::TailCallKind TCK : Kinds) {
 505     Call->setTailCallKind(TCK);
 506     std::unique_ptr<CallInst> Clone(cast<CallInst>(Call->clone()));
 507     EXPECT_EQ(Call->getTailCallKind(), Clone->getTailCallKind());
 508   }
 509   Call->setTailCallKind(CallInst::TCK_None);
 510
 511   // Test cloning an attribute.
 512   {
 513     AttrBuilder AB;
 514     AB.addAttribute(Attribute::ReadOnly);
 515     Call->setAttributes(AttributeSet::get(C, AttributeSet::FunctionIndex, AB));
 516     std::unique_ptr<CallInst> Clone(cast<CallInst>(Call->clone()));
 517     EXPECT_TRUE(Clone->onlyReadsMemory());
 518   }
 519 }
 520
 521 }  // end anonymous namespace
 522 }  // end namespace llvm
 523
 524