unittests/IR/InstructionsTest.cpp - llvm - Git at Google

 //===- llvm/unittest/IR/InstructionsTest.cpp - Instructions unit tests ----===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//

 #include "llvm/IR/Instructions.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Analysis/ValueTracking.h"
 #include "llvm/IR/BasicBlock.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/DerivedTypes.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/MDBuilder.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Operator.h"
 #include "gtest/gtest.h"
 #include <memory>

 namespace llvm {
 namespace {

 TEST(InstructionsTest, ReturnInst) {
   LLVMContext &C(getGlobalContext());

   // test for PR6589
   const ReturnInst* r0 = ReturnInst::Create(C);
   EXPECT_EQ(r0->getNumOperands(), 0U);
   EXPECT_EQ(r0->op_begin(), r0->op_end());

   IntegerType* Int1 = IntegerType::get(C, 1);
   Constant* One = ConstantInt::get(Int1, 1, true);
   const ReturnInst* r1 = ReturnInst::Create(C, One);
   EXPECT_EQ(1U, r1->getNumOperands());
   User::const_op_iterator b(r1->op_begin());
   EXPECT_NE(r1->op_end(), b);
   EXPECT_EQ(One, *b);
   EXPECT_EQ(One, r1->getOperand(0));
   ++b;
   EXPECT_EQ(r1->op_end(), b);

   // clean up
   delete r0;
   delete r1;
 }

 // Test fixture that provides a module and a single function within it. Useful
 // for tests that need to refer to the function in some way.
 class ModuleWithFunctionTest : public testing::Test {
 protected:
   ModuleWithFunctionTest() : M(new Module("MyModule", Ctx)) {
     FArgTypes.push_back(Type::getInt8Ty(Ctx));
     FArgTypes.push_back(Type::getInt32Ty(Ctx));
     FArgTypes.push_back(Type::getInt64Ty(Ctx));
     FunctionType *FTy =
         FunctionType::get(Type::getVoidTy(Ctx), FArgTypes, false);
     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
   }

   LLVMContext Ctx;
   std::unique_ptr<Module> M;
   SmallVector<Type *, 3> FArgTypes;
   Function *F;
 };

 TEST_F(ModuleWithFunctionTest, CallInst) {
   Value *Args[] = {ConstantInt::get(Type::getInt8Ty(Ctx), 20),
                    ConstantInt::get(Type::getInt32Ty(Ctx), 9999),
                    ConstantInt::get(Type::getInt64Ty(Ctx), 42)};
   std::unique_ptr<CallInst> Call(CallInst::Create(F, Args));

   // Make sure iteration over a call's arguments works as expected.
   unsigned Idx = 0;
   for (Value *Arg : Call->arg_operands()) {
     EXPECT_EQ(FArgTypes[Idx], Arg->getType());
     EXPECT_EQ(Call->getArgOperand(Idx)->getType(), Arg->getType());
     Idx++;
   }
 }

 TEST_F(ModuleWithFunctionTest, InvokeInst) {
   BasicBlock *BB1 = BasicBlock::Create(Ctx, "", F);
   BasicBlock *BB2 = BasicBlock::Create(Ctx, "", F);

   Value *Args[] = {ConstantInt::get(Type::getInt8Ty(Ctx), 20),
                    ConstantInt::get(Type::getInt32Ty(Ctx), 9999),
                    ConstantInt::get(Type::getInt64Ty(Ctx), 42)};
   std::unique_ptr<InvokeInst> Invoke(InvokeInst::Create(F, BB1, BB2, Args));

   // Make sure iteration over invoke's arguments works as expected.
   unsigned Idx = 0;
   for (Value *Arg : Invoke->arg_operands()) {
     EXPECT_EQ(FArgTypes[Idx], Arg->getType());
     EXPECT_EQ(Invoke->getArgOperand(Idx)->getType(), Arg->getType());
     Idx++;
   }
 }

 TEST(InstructionsTest, BranchInst) {
   LLVMContext &C(getGlobalContext());

   // Make a BasicBlocks
   BasicBlock* bb0 = BasicBlock::Create(C);
   BasicBlock* bb1 = BasicBlock::Create(C);

   // Mandatory BranchInst
   const BranchInst* b0 = BranchInst::Create(bb0);

   EXPECT_TRUE(b0->isUnconditional());
   EXPECT_FALSE(b0->isConditional());
   EXPECT_EQ(1U, b0->getNumSuccessors());

   // check num operands
   EXPECT_EQ(1U, b0->getNumOperands());

   EXPECT_NE(b0->op_begin(), b0->op_end());
   EXPECT_EQ(b0->op_end(), std::next(b0->op_begin()));

   EXPECT_EQ(b0->op_end(), std::next(b0->op_begin()));

   IntegerType* Int1 = IntegerType::get(C, 1);
   Constant* One = ConstantInt::get(Int1, 1, true);

   // Conditional BranchInst
   BranchInst* b1 = BranchInst::Create(bb0, bb1, One);

   EXPECT_FALSE(b1->isUnconditional());
   EXPECT_TRUE(b1->isConditional());
   EXPECT_EQ(2U, b1->getNumSuccessors());

   // check num operands
   EXPECT_EQ(3U, b1->getNumOperands());

   User::const_op_iterator b(b1->op_begin());

   // check COND
   EXPECT_NE(b, b1->op_end());
   EXPECT_EQ(One, *b);
   EXPECT_EQ(One, b1->getOperand(0));
   EXPECT_EQ(One, b1->getCondition());
   ++b;

   // check ELSE
   EXPECT_EQ(bb1, *b);
   EXPECT_EQ(bb1, b1->getOperand(1));
   EXPECT_EQ(bb1, b1->getSuccessor(1));
   ++b;

   // check THEN
   EXPECT_EQ(bb0, *b);
   EXPECT_EQ(bb0, b1->getOperand(2));
   EXPECT_EQ(bb0, b1->getSuccessor(0));
   ++b;

   EXPECT_EQ(b1->op_end(), b);

   // clean up
   delete b0;
   delete b1;

   delete bb0;
   delete bb1;
 }

 TEST(InstructionsTest, CastInst) {
   LLVMContext &C(getGlobalContext());

   Type *Int8Ty = Type::getInt8Ty(C);
   Type *Int16Ty = Type::getInt16Ty(C);
   Type *Int32Ty = Type::getInt32Ty(C);
   Type *Int64Ty = Type::getInt64Ty(C);
   Type *V8x8Ty = VectorType::get(Int8Ty, 8);
   Type *V8x64Ty = VectorType::get(Int64Ty, 8);
   Type *X86MMXTy = Type::getX86_MMXTy(C);

   Type *HalfTy = Type::getHalfTy(C);
   Type *FloatTy = Type::getFloatTy(C);
   Type *DoubleTy = Type::getDoubleTy(C);

   Type *V2Int32Ty = VectorType::get(Int32Ty, 2);
   Type *V2Int64Ty = VectorType::get(Int64Ty, 2);
   Type *V4Int16Ty = VectorType::get(Int16Ty, 4);

   Type *Int32PtrTy = PointerType::get(Int32Ty, 0);
   Type *Int64PtrTy = PointerType::get(Int64Ty, 0);

   Type *Int32PtrAS1Ty = PointerType::get(Int32Ty, 1);
   Type *Int64PtrAS1Ty = PointerType::get(Int64Ty, 1);

   Type *V2Int32PtrAS1Ty = VectorType::get(Int32PtrAS1Ty, 2);
   Type *V2Int64PtrAS1Ty = VectorType::get(Int64PtrAS1Ty, 2);
   Type *V4Int32PtrAS1Ty = VectorType::get(Int32PtrAS1Ty, 4);
   Type *V4Int64PtrAS1Ty = VectorType::get(Int64PtrAS1Ty, 4);

   Type *V2Int64PtrTy = VectorType::get(Int64PtrTy, 2);
   Type *V2Int32PtrTy = VectorType::get(Int32PtrTy, 2);
   Type *V4Int32PtrTy = VectorType::get(Int32PtrTy, 4);

   const Constant* c8 = Constant::getNullValue(V8x8Ty);
   const Constant* c64 = Constant::getNullValue(V8x64Ty);

   const Constant *v2ptr32 = Constant::getNullValue(V2Int32PtrTy);

   EXPECT_TRUE(CastInst::isCastable(V8x8Ty, X86MMXTy));
   EXPECT_TRUE(CastInst::isCastable(X86MMXTy, V8x8Ty));
   EXPECT_FALSE(CastInst::isCastable(Int64Ty, X86MMXTy));
   EXPECT_TRUE(CastInst::isCastable(V8x64Ty, V8x8Ty));
   EXPECT_TRUE(CastInst::isCastable(V8x8Ty, V8x64Ty));
   EXPECT_EQ(CastInst::Trunc, CastInst::getCastOpcode(c64, true, V8x8Ty, true));
   EXPECT_EQ(CastInst::SExt, CastInst::getCastOpcode(c8, true, V8x64Ty, true));

   EXPECT_FALSE(CastInst::isBitCastable(V8x8Ty, X86MMXTy));
   EXPECT_FALSE(CastInst::isBitCastable(X86MMXTy, V8x8Ty));
   EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, X86MMXTy));
   EXPECT_FALSE(CastInst::isBitCastable(V8x64Ty, V8x8Ty));
   EXPECT_FALSE(CastInst::isBitCastable(V8x8Ty, V8x64Ty));

   // Check address space casts are rejected since we don't know the sizes here
   EXPECT_FALSE(CastInst::isBitCastable(Int32PtrTy, Int32PtrAS1Ty));
   EXPECT_FALSE(CastInst::isBitCastable(Int32PtrAS1Ty, Int32PtrTy));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, V2Int32PtrAS1Ty));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V2Int32PtrTy));
   EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V2Int64PtrAS1Ty));
   EXPECT_TRUE(CastInst::isCastable(V2Int32PtrAS1Ty, V2Int32PtrTy));
   EXPECT_EQ(CastInst::AddrSpaceCast, CastInst::getCastOpcode(v2ptr32, true,
                                                              V2Int32PtrAS1Ty,
                                                              true));

   // Test mismatched number of elements for pointers
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V4Int64PtrAS1Ty));
   EXPECT_FALSE(CastInst::isBitCastable(V4Int64PtrAS1Ty, V2Int32PtrAS1Ty));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V4Int32PtrAS1Ty));
   EXPECT_FALSE(CastInst::isBitCastable(Int32PtrTy, V2Int32PtrTy));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, Int32PtrTy));

   EXPECT_TRUE(CastInst::isBitCastable(Int32PtrTy, Int64PtrTy));
   EXPECT_FALSE(CastInst::isBitCastable(DoubleTy, FloatTy));
   EXPECT_FALSE(CastInst::isBitCastable(FloatTy, DoubleTy));
   EXPECT_TRUE(CastInst::isBitCastable(FloatTy, FloatTy));
   EXPECT_TRUE(CastInst::isBitCastable(FloatTy, FloatTy));
   EXPECT_TRUE(CastInst::isBitCastable(FloatTy, Int32Ty));
   EXPECT_TRUE(CastInst::isBitCastable(Int16Ty, HalfTy));
   EXPECT_TRUE(CastInst::isBitCastable(Int32Ty, FloatTy));
   EXPECT_TRUE(CastInst::isBitCastable(V2Int32Ty, Int64Ty));

   EXPECT_TRUE(CastInst::isBitCastable(V2Int32Ty, V4Int16Ty));
   EXPECT_FALSE(CastInst::isBitCastable(Int32Ty, Int64Ty));
   EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, Int32Ty));

   EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, Int64Ty));
   EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, V2Int32PtrTy));
   EXPECT_TRUE(CastInst::isBitCastable(V2Int64PtrTy, V2Int32PtrTy));
   EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrTy, V2Int64PtrTy));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32Ty, V2Int64Ty));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int64Ty, V2Int32Ty));


   EXPECT_FALSE(CastInst::castIsValid(Instruction::BitCast,
                                      Constant::getNullValue(V4Int32PtrTy),
                                      V2Int32PtrTy));
   EXPECT_FALSE(CastInst::castIsValid(Instruction::BitCast,
                                      Constant::getNullValue(V2Int32PtrTy),
                                      V4Int32PtrTy));

   EXPECT_FALSE(CastInst::castIsValid(Instruction::AddrSpaceCast,
                                      Constant::getNullValue(V4Int32PtrAS1Ty),
                                      V2Int32PtrTy));
   EXPECT_FALSE(CastInst::castIsValid(Instruction::AddrSpaceCast,
                                      Constant::getNullValue(V2Int32PtrTy),
                                      V4Int32PtrAS1Ty));


   // Check that assertion is not hit when creating a cast with a vector of
   // pointers
   // First form
   BasicBlock *BB = BasicBlock::Create(C);
   Constant *NullV2I32Ptr = Constant::getNullValue(V2Int32PtrTy);
   CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty, "foo", BB);

   // Second form
   CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty);
 }

 TEST(InstructionsTest, VectorGep) {
   LLVMContext &C(getGlobalContext());

   // Type Definitions
   Type *I8Ty = IntegerType::get(C, 8);
   Type *I32Ty = IntegerType::get(C, 32);
   PointerType *Ptri8Ty = PointerType::get(I8Ty, 0);
   PointerType *Ptri32Ty = PointerType::get(I32Ty, 0);

   VectorType *V2xi8PTy = VectorType::get(Ptri8Ty, 2);
   VectorType *V2xi32PTy = VectorType::get(Ptri32Ty, 2);

   // Test different aspects of the vector-of-pointers type
   // and GEPs which use this type.
   ConstantInt *Ci32a = ConstantInt::get(C, APInt(32, 1492));
   ConstantInt *Ci32b = ConstantInt::get(C, APInt(32, 1948));
   std::vector<Constant*> ConstVa(2, Ci32a);
   std::vector<Constant*> ConstVb(2, Ci32b);
   Constant *C2xi32a = ConstantVector::get(ConstVa);
   Constant *C2xi32b = ConstantVector::get(ConstVb);

   CastInst *PtrVecA = new IntToPtrInst(C2xi32a, V2xi32PTy);
   CastInst *PtrVecB = new IntToPtrInst(C2xi32b, V2xi32PTy);

   ICmpInst *ICmp0 = new ICmpInst(ICmpInst::ICMP_SGT, PtrVecA, PtrVecB);
   ICmpInst *ICmp1 = new ICmpInst(ICmpInst::ICMP_ULT, PtrVecA, PtrVecB);
   EXPECT_NE(ICmp0, ICmp1); // suppress warning.

   BasicBlock* BB0 = BasicBlock::Create(C);
   // Test InsertAtEnd ICmpInst constructor.
   ICmpInst *ICmp2 = new ICmpInst(*BB0, ICmpInst::ICMP_SGE, PtrVecA, PtrVecB);
   EXPECT_NE(ICmp0, ICmp2); // suppress warning.

   GetElementPtrInst *Gep0 = GetElementPtrInst::Create(I32Ty, PtrVecA, C2xi32a);
   GetElementPtrInst *Gep1 = GetElementPtrInst::Create(I32Ty, PtrVecA, C2xi32b);
   GetElementPtrInst *Gep2 = GetElementPtrInst::Create(I32Ty, PtrVecB, C2xi32a);
   GetElementPtrInst *Gep3 = GetElementPtrInst::Create(I32Ty, PtrVecB, C2xi32b);

   CastInst *BTC0 = new BitCastInst(Gep0, V2xi8PTy);
   CastInst *BTC1 = new BitCastInst(Gep1, V2xi8PTy);
   CastInst *BTC2 = new BitCastInst(Gep2, V2xi8PTy);
   CastInst *BTC3 = new BitCastInst(Gep3, V2xi8PTy);

   Value *S0 = BTC0->stripPointerCasts();
   Value *S1 = BTC1->stripPointerCasts();
   Value *S2 = BTC2->stripPointerCasts();
   Value *S3 = BTC3->stripPointerCasts();

   EXPECT_NE(S0, Gep0);
   EXPECT_NE(S1, Gep1);
   EXPECT_NE(S2, Gep2);
   EXPECT_NE(S3, Gep3);

   int64_t Offset;
   DataLayout TD("e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3"
                 "2:32:32-f64:64:64-v64:64:64-v128:128:128-a:0:64-s:64:64-f80"
                 ":128:128-n8:16:32:64-S128");
   // Make sure we don't crash
   GetPointerBaseWithConstantOffset(Gep0, Offset, TD);
   GetPointerBaseWithConstantOffset(Gep1, Offset, TD);
   GetPointerBaseWithConstantOffset(Gep2, Offset, TD);
   GetPointerBaseWithConstantOffset(Gep3, Offset, TD);

   // Gep of Geps
   GetElementPtrInst *GepII0 = GetElementPtrInst::Create(I32Ty, Gep0, C2xi32b);
   GetElementPtrInst *GepII1 = GetElementPtrInst::Create(I32Ty, Gep1, C2xi32a);
   GetElementPtrInst *GepII2 = GetElementPtrInst::Create(I32Ty, Gep2, C2xi32b);
   GetElementPtrInst *GepII3 = GetElementPtrInst::Create(I32Ty, Gep3, C2xi32a);

   EXPECT_EQ(GepII0->getNumIndices(), 1u);
   EXPECT_EQ(GepII1->getNumIndices(), 1u);
   EXPECT_EQ(GepII2->getNumIndices(), 1u);
   EXPECT_EQ(GepII3->getNumIndices(), 1u);

   EXPECT_FALSE(GepII0->hasAllZeroIndices());
   EXPECT_FALSE(GepII1->hasAllZeroIndices());
   EXPECT_FALSE(GepII2->hasAllZeroIndices());
   EXPECT_FALSE(GepII3->hasAllZeroIndices());

   delete GepII0;
   delete GepII1;
   delete GepII2;
   delete GepII3;

   delete BTC0;
   delete BTC1;
   delete BTC2;
   delete BTC3;

   delete Gep0;
   delete Gep1;
   delete Gep2;
   delete Gep3;

   ICmp2->eraseFromParent();
   delete BB0;

   delete ICmp0;
   delete ICmp1;
   delete PtrVecA;
   delete PtrVecB;
 }

 TEST(InstructionsTest, FPMathOperator) {
   LLVMContext &Context = getGlobalContext();
   IRBuilder<> Builder(Context);
   MDBuilder MDHelper(Context);
   Instruction *I = Builder.CreatePHI(Builder.getDoubleTy(), 0);
   MDNode *MD1 = MDHelper.createFPMath(1.0);
   Value *V1 = Builder.CreateFAdd(I, I, "", MD1);
   EXPECT_TRUE(isa<FPMathOperator>(V1));
   FPMathOperator *O1 = cast<FPMathOperator>(V1);
   EXPECT_EQ(O1->getFPAccuracy(), 1.0);
   delete V1;
   delete I;
 }


 TEST(InstructionsTest, isEliminableCastPair) {
   LLVMContext &C(getGlobalContext());

   Type* Int16Ty = Type::getInt16Ty(C);
   Type* Int32Ty = Type::getInt32Ty(C);
   Type* Int64Ty = Type::getInt64Ty(C);
   Type* Int64PtrTy = Type::getInt64PtrTy(C);

   // Source and destination pointers have same size -> bitcast.
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
                                            CastInst::IntToPtr,
                                            Int64PtrTy, Int64Ty, Int64PtrTy,
                                            Int32Ty, nullptr, Int32Ty),
             CastInst::BitCast);

   // Source and destination have unknown sizes, but the same address space and
   // the intermediate int is the maximum pointer size -> bitcast
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
                                            CastInst::IntToPtr,
                                            Int64PtrTy, Int64Ty, Int64PtrTy,
                                            nullptr, nullptr, nullptr),
             CastInst::BitCast);

   // Source and destination have unknown sizes, but the same address space and
   // the intermediate int is not the maximum pointer size -> nothing
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
                                            CastInst::IntToPtr,
                                            Int64PtrTy, Int32Ty, Int64PtrTy,
                                            nullptr, nullptr, nullptr),
             0U);

   // Middle pointer big enough -> bitcast.
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
                                            CastInst::PtrToInt,
                                            Int64Ty, Int64PtrTy, Int64Ty,
                                            nullptr, Int64Ty, nullptr),
             CastInst::BitCast);

   // Middle pointer too small -> fail.
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
                                            CastInst::PtrToInt,
                                            Int64Ty, Int64PtrTy, Int64Ty,
                                            nullptr, Int32Ty, nullptr),
             0U);

   // Test that we don't eliminate bitcasts between different address spaces,
   // or if we don't have available pointer size information.
   DataLayout DL("e-p:32:32:32-p1:16:16:16-p2:64:64:64-i1:8:8-i8:8:8-i16:16:16"
                 "-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64"
                 "-v128:128:128-a:0:64-s:64:64-f80:128:128-n8:16:32:64-S128");

   Type* Int64PtrTyAS1 = Type::getInt64PtrTy(C, 1);
   Type* Int64PtrTyAS2 = Type::getInt64PtrTy(C, 2);

   IntegerType *Int16SizePtr = DL.getIntPtrType(C, 1);
   IntegerType *Int64SizePtr = DL.getIntPtrType(C, 2);

   // Cannot simplify inttoptr, addrspacecast
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
                                            CastInst::AddrSpaceCast,
                                            Int16Ty, Int64PtrTyAS1, Int64PtrTyAS2,
                                            nullptr, Int16SizePtr, Int64SizePtr),
             0U);

   // Cannot simplify addrspacecast, ptrtoint
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::AddrSpaceCast,
                                            CastInst::PtrToInt,
                                            Int64PtrTyAS1, Int64PtrTyAS2, Int16Ty,
                                            Int64SizePtr, Int16SizePtr, nullptr),
             0U);

   // Pass since the bitcast address spaces are the same
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
                                            CastInst::BitCast,
                                            Int16Ty, Int64PtrTyAS1, Int64PtrTyAS1,
                                            nullptr, nullptr, nullptr),
             CastInst::IntToPtr);

 }

 TEST(InstructionsTest, CloneCall) {
   LLVMContext &C(getGlobalContext());
   Type *Int32Ty = Type::getInt32Ty(C);
   Type *ArgTys[] = {Int32Ty, Int32Ty, Int32Ty};
   Type *FnTy = FunctionType::get(Int32Ty, ArgTys, /*isVarArg=*/false);
   Value *Callee = Constant::getNullValue(FnTy->getPointerTo());
   Value *Args[] = {
     ConstantInt::get(Int32Ty, 1),
     ConstantInt::get(Int32Ty, 2),
     ConstantInt::get(Int32Ty, 3)
   };
   std::unique_ptr<CallInst> Call(CallInst::Create(Callee, Args, "result"));

   // Test cloning the tail call kind.
   CallInst::TailCallKind Kinds[] = {CallInst::TCK_None, CallInst::TCK_Tail,
                                     CallInst::TCK_MustTail};
   for (CallInst::TailCallKind TCK : Kinds) {
     Call->setTailCallKind(TCK);
     std::unique_ptr<CallInst> Clone(cast<CallInst>(Call->clone()));
     EXPECT_EQ(Call->getTailCallKind(), Clone->getTailCallKind());
   }
   Call->setTailCallKind(CallInst::TCK_None);

   // Test cloning an attribute.
   {
     AttrBuilder AB;
     AB.addAttribute(Attribute::ReadOnly);
     Call->setAttributes(AttributeSet::get(C, AttributeSet::FunctionIndex, AB));
     std::unique_ptr<CallInst> Clone(cast<CallInst>(Call->clone()));
     EXPECT_TRUE(Clone->onlyReadsMemory());
   }
 }

 }  // end anonymous namespace
 }  // end namespace llvm
	//===- llvm/unittest/IR/InstructionsTest.cpp - Instructions unit tests ----===//
	//
	// The LLVM Compiler Infrastructure
	//
	// This file is distributed under the University of Illinois Open Source
	// License. See LICENSE.TXT for details.
	//
	//===----------------------------------------------------------------------===//

	#include "llvm/IR/Instructions.h"
	#include "llvm/ADT/STLExtras.h"
	#include "llvm/Analysis/ValueTracking.h"
	#include "llvm/IR/BasicBlock.h"
	#include "llvm/IR/Constants.h"
	#include "llvm/IR/DataLayout.h"
	#include "llvm/IR/DerivedTypes.h"
	#include "llvm/IR/Function.h"
	#include "llvm/IR/IRBuilder.h"
	#include "llvm/IR/LLVMContext.h"
	#include "llvm/IR/MDBuilder.h"
	#include "llvm/IR/Module.h"
	#include "llvm/IR/Operator.h"
	#include "gtest/gtest.h"
	#include <memory>

	namespace llvm {
	namespace {

	TEST(InstructionsTest, ReturnInst) {
	LLVMContext &C(getGlobalContext());

	// test for PR6589
	const ReturnInst* r0 = ReturnInst::Create(C);
	EXPECT_EQ(r0->getNumOperands(), 0U);
	EXPECT_EQ(r0->op_begin(), r0->op_end());

	IntegerType* Int1 = IntegerType::get(C, 1);
	Constant* One = ConstantInt::get(Int1, 1, true);
	const ReturnInst* r1 = ReturnInst::Create(C, One);
	EXPECT_EQ(1U, r1->getNumOperands());
	User::const_op_iterator b(r1->op_begin());
	EXPECT_NE(r1->op_end(), b);
	EXPECT_EQ(One, *b);
	EXPECT_EQ(One, r1->getOperand(0));
	++b;
	EXPECT_EQ(r1->op_end(), b);

	// clean up
	delete r0;
	delete r1;
	}

	// Test fixture that provides a module and a single function within it. Useful
	// for tests that need to refer to the function in some way.
	class ModuleWithFunctionTest : public testing::Test {
	protected:
	ModuleWithFunctionTest() : M(new Module("MyModule", Ctx)) {
	FArgTypes.push_back(Type::getInt8Ty(Ctx));
	FArgTypes.push_back(Type::getInt32Ty(Ctx));
	FArgTypes.push_back(Type::getInt64Ty(Ctx));
	FunctionType *FTy =
	FunctionType::get(Type::getVoidTy(Ctx), FArgTypes, false);
	F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
	}

	LLVMContext Ctx;
	std::unique_ptr<Module> M;
	SmallVector<Type *, 3> FArgTypes;
	Function *F;
	};

	TEST_F(ModuleWithFunctionTest, CallInst) {
	Value *Args[] = {ConstantInt::get(Type::getInt8Ty(Ctx), 20),
	ConstantInt::get(Type::getInt32Ty(Ctx), 9999),
	ConstantInt::get(Type::getInt64Ty(Ctx), 42)};
	std::unique_ptr<CallInst> Call(CallInst::Create(F, Args));

	// Make sure iteration over a call's arguments works as expected.
	unsigned Idx = 0;
	for (Value *Arg : Call->arg_operands()) {
	EXPECT_EQ(FArgTypes[Idx], Arg->getType());
	EXPECT_EQ(Call->getArgOperand(Idx)->getType(), Arg->getType());
	Idx++;
	}
	}

	TEST_F(ModuleWithFunctionTest, InvokeInst) {
	BasicBlock *BB1 = BasicBlock::Create(Ctx, "", F);
	BasicBlock *BB2 = BasicBlock::Create(Ctx, "", F);

	Value *Args[] = {ConstantInt::get(Type::getInt8Ty(Ctx), 20),
	ConstantInt::get(Type::getInt32Ty(Ctx), 9999),
	ConstantInt::get(Type::getInt64Ty(Ctx), 42)};
	std::unique_ptr<InvokeInst> Invoke(InvokeInst::Create(F, BB1, BB2, Args));

	// Make sure iteration over invoke's arguments works as expected.
	unsigned Idx = 0;
	for (Value *Arg : Invoke->arg_operands()) {
	EXPECT_EQ(FArgTypes[Idx], Arg->getType());
	EXPECT_EQ(Invoke->getArgOperand(Idx)->getType(), Arg->getType());
	Idx++;
	}
	}

	TEST(InstructionsTest, BranchInst) {
	LLVMContext &C(getGlobalContext());

	// Make a BasicBlocks
	BasicBlock* bb0 = BasicBlock::Create(C);
	BasicBlock* bb1 = BasicBlock::Create(C);

	// Mandatory BranchInst
	const BranchInst* b0 = BranchInst::Create(bb0);

	EXPECT_TRUE(b0->isUnconditional());
	EXPECT_FALSE(b0->isConditional());
	EXPECT_EQ(1U, b0->getNumSuccessors());

	// check num operands
	EXPECT_EQ(1U, b0->getNumOperands());

	EXPECT_NE(b0->op_begin(), b0->op_end());
	EXPECT_EQ(b0->op_end(), std::next(b0->op_begin()));

	EXPECT_EQ(b0->op_end(), std::next(b0->op_begin()));

	IntegerType* Int1 = IntegerType::get(C, 1);
	Constant* One = ConstantInt::get(Int1, 1, true);

	// Conditional BranchInst
	BranchInst* b1 = BranchInst::Create(bb0, bb1, One);

	EXPECT_FALSE(b1->isUnconditional());
	EXPECT_TRUE(b1->isConditional());
	EXPECT_EQ(2U, b1->getNumSuccessors());

	// check num operands
	EXPECT_EQ(3U, b1->getNumOperands());

	User::const_op_iterator b(b1->op_begin());

	// check COND
	EXPECT_NE(b, b1->op_end());
	EXPECT_EQ(One, *b);
	EXPECT_EQ(One, b1->getOperand(0));
	EXPECT_EQ(One, b1->getCondition());
	++b;

	// check ELSE
	EXPECT_EQ(bb1, *b);
	EXPECT_EQ(bb1, b1->getOperand(1));
	EXPECT_EQ(bb1, b1->getSuccessor(1));
	++b;

	// check THEN
	EXPECT_EQ(bb0, *b);
	EXPECT_EQ(bb0, b1->getOperand(2));
	EXPECT_EQ(bb0, b1->getSuccessor(0));
	++b;

	EXPECT_EQ(b1->op_end(), b);

	// clean up
	delete b0;
	delete b1;

	delete bb0;
	delete bb1;
	}

	TEST(InstructionsTest, CastInst) {
	LLVMContext &C(getGlobalContext());

	Type *Int8Ty = Type::getInt8Ty(C);
	Type *Int16Ty = Type::getInt16Ty(C);
	Type *Int32Ty = Type::getInt32Ty(C);
	Type *Int64Ty = Type::getInt64Ty(C);
	Type *V8x8Ty = VectorType::get(Int8Ty, 8);
	Type *V8x64Ty = VectorType::get(Int64Ty, 8);
	Type *X86MMXTy = Type::getX86_MMXTy(C);

	Type *HalfTy = Type::getHalfTy(C);
	Type *FloatTy = Type::getFloatTy(C);
	Type *DoubleTy = Type::getDoubleTy(C);

	Type *V2Int32Ty = VectorType::get(Int32Ty, 2);
	Type *V2Int64Ty = VectorType::get(Int64Ty, 2);
	Type *V4Int16Ty = VectorType::get(Int16Ty, 4);

	Type *Int32PtrTy = PointerType::get(Int32Ty, 0);
	Type *Int64PtrTy = PointerType::get(Int64Ty, 0);

	Type *Int32PtrAS1Ty = PointerType::get(Int32Ty, 1);
	Type *Int64PtrAS1Ty = PointerType::get(Int64Ty, 1);

	Type *V2Int32PtrAS1Ty = VectorType::get(Int32PtrAS1Ty, 2);
	Type *V2Int64PtrAS1Ty = VectorType::get(Int64PtrAS1Ty, 2);
	Type *V4Int32PtrAS1Ty = VectorType::get(Int32PtrAS1Ty, 4);
	Type *V4Int64PtrAS1Ty = VectorType::get(Int64PtrAS1Ty, 4);

	Type *V2Int64PtrTy = VectorType::get(Int64PtrTy, 2);
	Type *V2Int32PtrTy = VectorType::get(Int32PtrTy, 2);
	Type *V4Int32PtrTy = VectorType::get(Int32PtrTy, 4);

	const Constant* c8 = Constant::getNullValue(V8x8Ty);
	const Constant* c64 = Constant::getNullValue(V8x64Ty);

	const Constant *v2ptr32 = Constant::getNullValue(V2Int32PtrTy);

	EXPECT_TRUE(CastInst::isCastable(V8x8Ty, X86MMXTy));
	EXPECT_TRUE(CastInst::isCastable(X86MMXTy, V8x8Ty));
	EXPECT_FALSE(CastInst::isCastable(Int64Ty, X86MMXTy));
	EXPECT_TRUE(CastInst::isCastable(V8x64Ty, V8x8Ty));
	EXPECT_TRUE(CastInst::isCastable(V8x8Ty, V8x64Ty));
	EXPECT_EQ(CastInst::Trunc, CastInst::getCastOpcode(c64, true, V8x8Ty, true));
	EXPECT_EQ(CastInst::SExt, CastInst::getCastOpcode(c8, true, V8x64Ty, true));

	EXPECT_FALSE(CastInst::isBitCastable(V8x8Ty, X86MMXTy));
	EXPECT_FALSE(CastInst::isBitCastable(X86MMXTy, V8x8Ty));
	EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, X86MMXTy));
	EXPECT_FALSE(CastInst::isBitCastable(V8x64Ty, V8x8Ty));
	EXPECT_FALSE(CastInst::isBitCastable(V8x8Ty, V8x64Ty));

	// Check address space casts are rejected since we don't know the sizes here
	EXPECT_FALSE(CastInst::isBitCastable(Int32PtrTy, Int32PtrAS1Ty));
	EXPECT_FALSE(CastInst::isBitCastable(Int32PtrAS1Ty, Int32PtrTy));
	EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, V2Int32PtrAS1Ty));
	EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V2Int32PtrTy));
	EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V2Int64PtrAS1Ty));
	EXPECT_TRUE(CastInst::isCastable(V2Int32PtrAS1Ty, V2Int32PtrTy));
	EXPECT_EQ(CastInst::AddrSpaceCast, CastInst::getCastOpcode(v2ptr32, true,
	V2Int32PtrAS1Ty,
	true));

	// Test mismatched number of elements for pointers
	EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V4Int64PtrAS1Ty));
	EXPECT_FALSE(CastInst::isBitCastable(V4Int64PtrAS1Ty, V2Int32PtrAS1Ty));
	EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrAS1Ty, V4Int32PtrAS1Ty));
	EXPECT_FALSE(CastInst::isBitCastable(Int32PtrTy, V2Int32PtrTy));
	EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, Int32PtrTy));

	EXPECT_TRUE(CastInst::isBitCastable(Int32PtrTy, Int64PtrTy));
	EXPECT_FALSE(CastInst::isBitCastable(DoubleTy, FloatTy));
	EXPECT_FALSE(CastInst::isBitCastable(FloatTy, DoubleTy));
	EXPECT_TRUE(CastInst::isBitCastable(FloatTy, FloatTy));
	EXPECT_TRUE(CastInst::isBitCastable(FloatTy, FloatTy));
	EXPECT_TRUE(CastInst::isBitCastable(FloatTy, Int32Ty));
	EXPECT_TRUE(CastInst::isBitCastable(Int16Ty, HalfTy));
	EXPECT_TRUE(CastInst::isBitCastable(Int32Ty, FloatTy));
	EXPECT_TRUE(CastInst::isBitCastable(V2Int32Ty, Int64Ty));

	EXPECT_TRUE(CastInst::isBitCastable(V2Int32Ty, V4Int16Ty));
	EXPECT_FALSE(CastInst::isBitCastable(Int32Ty, Int64Ty));
	EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, Int32Ty));

	EXPECT_FALSE(CastInst::isBitCastable(V2Int32PtrTy, Int64Ty));
	EXPECT_FALSE(CastInst::isBitCastable(Int64Ty, V2Int32PtrTy));
	EXPECT_TRUE(CastInst::isBitCastable(V2Int64PtrTy, V2Int32PtrTy));
	EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrTy, V2Int64PtrTy));
	EXPECT_FALSE(CastInst::isBitCastable(V2Int32Ty, V2Int64Ty));
	EXPECT_FALSE(CastInst::isBitCastable(V2Int64Ty, V2Int32Ty));


	EXPECT_FALSE(CastInst::castIsValid(Instruction::BitCast,
	Constant::getNullValue(V4Int32PtrTy),
	V2Int32PtrTy));
	EXPECT_FALSE(CastInst::castIsValid(Instruction::BitCast,
	Constant::getNullValue(V2Int32PtrTy),
	V4Int32PtrTy));

	EXPECT_FALSE(CastInst::castIsValid(Instruction::AddrSpaceCast,
	Constant::getNullValue(V4Int32PtrAS1Ty),
	V2Int32PtrTy));
	EXPECT_FALSE(CastInst::castIsValid(Instruction::AddrSpaceCast,
	Constant::getNullValue(V2Int32PtrTy),
	V4Int32PtrAS1Ty));


	// Check that assertion is not hit when creating a cast with a vector of
	// pointers
	// First form
	BasicBlock *BB = BasicBlock::Create(C);
	Constant *NullV2I32Ptr = Constant::getNullValue(V2Int32PtrTy);
	CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty, "foo", BB);

	// Second form
	CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty);
	}

	TEST(InstructionsTest, VectorGep) {
	LLVMContext &C(getGlobalContext());

	// Type Definitions
	Type *I8Ty = IntegerType::get(C, 8);
	Type *I32Ty = IntegerType::get(C, 32);
	PointerType *Ptri8Ty = PointerType::get(I8Ty, 0);
	PointerType *Ptri32Ty = PointerType::get(I32Ty, 0);

	VectorType *V2xi8PTy = VectorType::get(Ptri8Ty, 2);
	VectorType *V2xi32PTy = VectorType::get(Ptri32Ty, 2);

	// Test different aspects of the vector-of-pointers type
	// and GEPs which use this type.
	ConstantInt *Ci32a = ConstantInt::get(C, APInt(32, 1492));
	ConstantInt *Ci32b = ConstantInt::get(C, APInt(32, 1948));
	std::vector<Constant*> ConstVa(2, Ci32a);
	std::vector<Constant*> ConstVb(2, Ci32b);
	Constant *C2xi32a = ConstantVector::get(ConstVa);
	Constant *C2xi32b = ConstantVector::get(ConstVb);

	CastInst *PtrVecA = new IntToPtrInst(C2xi32a, V2xi32PTy);
	CastInst *PtrVecB = new IntToPtrInst(C2xi32b, V2xi32PTy);

	ICmpInst *ICmp0 = new ICmpInst(ICmpInst::ICMP_SGT, PtrVecA, PtrVecB);
	ICmpInst *ICmp1 = new ICmpInst(ICmpInst::ICMP_ULT, PtrVecA, PtrVecB);
	EXPECT_NE(ICmp0, ICmp1); // suppress warning.

	BasicBlock* BB0 = BasicBlock::Create(C);
	// Test InsertAtEnd ICmpInst constructor.
	ICmpInst ICmp2 = new ICmpInst(BB0, ICmpInst::ICMP_SGE, PtrVecA, PtrVecB);
	EXPECT_NE(ICmp0, ICmp2); // suppress warning.

	GetElementPtrInst *Gep0 = GetElementPtrInst::Create(I32Ty, PtrVecA, C2xi32a);
	GetElementPtrInst *Gep1 = GetElementPtrInst::Create(I32Ty, PtrVecA, C2xi32b);
	GetElementPtrInst *Gep2 = GetElementPtrInst::Create(I32Ty, PtrVecB, C2xi32a);
	GetElementPtrInst *Gep3 = GetElementPtrInst::Create(I32Ty, PtrVecB, C2xi32b);

	CastInst *BTC0 = new BitCastInst(Gep0, V2xi8PTy);
	CastInst *BTC1 = new BitCastInst(Gep1, V2xi8PTy);
	CastInst *BTC2 = new BitCastInst(Gep2, V2xi8PTy);
	CastInst *BTC3 = new BitCastInst(Gep3, V2xi8PTy);

	Value *S0 = BTC0->stripPointerCasts();
	Value *S1 = BTC1->stripPointerCasts();
	Value *S2 = BTC2->stripPointerCasts();
	Value *S3 = BTC3->stripPointerCasts();

	EXPECT_NE(S0, Gep0);
	EXPECT_NE(S1, Gep1);
	EXPECT_NE(S2, Gep2);
	EXPECT_NE(S3, Gep3);

	int64_t Offset;
	DataLayout TD("e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3"
	"2:32:32-f64:64:64-v64:64:64-v128:128:128-a:0:64-s:64:64-f80"
	":128:128-n8:16:32:64-S128");
	// Make sure we don't crash
	GetPointerBaseWithConstantOffset(Gep0, Offset, TD);
	GetPointerBaseWithConstantOffset(Gep1, Offset, TD);
	GetPointerBaseWithConstantOffset(Gep2, Offset, TD);
	GetPointerBaseWithConstantOffset(Gep3, Offset, TD);

	// Gep of Geps
	GetElementPtrInst *GepII0 = GetElementPtrInst::Create(I32Ty, Gep0, C2xi32b);
	GetElementPtrInst *GepII1 = GetElementPtrInst::Create(I32Ty, Gep1, C2xi32a);
	GetElementPtrInst *GepII2 = GetElementPtrInst::Create(I32Ty, Gep2, C2xi32b);
	GetElementPtrInst *GepII3 = GetElementPtrInst::Create(I32Ty, Gep3, C2xi32a);

	EXPECT_EQ(GepII0->getNumIndices(), 1u);
	EXPECT_EQ(GepII1->getNumIndices(), 1u);
	EXPECT_EQ(GepII2->getNumIndices(), 1u);
	EXPECT_EQ(GepII3->getNumIndices(), 1u);

	EXPECT_FALSE(GepII0->hasAllZeroIndices());
	EXPECT_FALSE(GepII1->hasAllZeroIndices());
	EXPECT_FALSE(GepII2->hasAllZeroIndices());
	EXPECT_FALSE(GepII3->hasAllZeroIndices());

	delete GepII0;
	delete GepII1;
	delete GepII2;
	delete GepII3;

	delete BTC0;
	delete BTC1;
	delete BTC2;
	delete BTC3;

	delete Gep0;
	delete Gep1;
	delete Gep2;
	delete Gep3;

	ICmp2->eraseFromParent();
	delete BB0;

	delete ICmp0;
	delete ICmp1;
	delete PtrVecA;
	delete PtrVecB;
	}

	TEST(InstructionsTest, FPMathOperator) {
	LLVMContext &Context = getGlobalContext();
	IRBuilder<> Builder(Context);
	MDBuilder MDHelper(Context);
	Instruction *I = Builder.CreatePHI(Builder.getDoubleTy(), 0);
	MDNode *MD1 = MDHelper.createFPMath(1.0);
	Value *V1 = Builder.CreateFAdd(I, I, "", MD1);
	EXPECT_TRUE(isa<FPMathOperator>(V1));
	FPMathOperator *O1 = cast<FPMathOperator>(V1);
	EXPECT_EQ(O1->getFPAccuracy(), 1.0);
	delete V1;
	delete I;
	}


	TEST(InstructionsTest, isEliminableCastPair) {
	LLVMContext &C(getGlobalContext());

	Type* Int16Ty = Type::getInt16Ty(C);
	Type* Int32Ty = Type::getInt32Ty(C);
	Type* Int64Ty = Type::getInt64Ty(C);
	Type* Int64PtrTy = Type::getInt64PtrTy(C);

	// Source and destination pointers have same size -> bitcast.
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
	CastInst::IntToPtr,
	Int64PtrTy, Int64Ty, Int64PtrTy,
	Int32Ty, nullptr, Int32Ty),
	CastInst::BitCast);

	// Source and destination have unknown sizes, but the same address space and
	// the intermediate int is the maximum pointer size -> bitcast
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
	CastInst::IntToPtr,
	Int64PtrTy, Int64Ty, Int64PtrTy,
	nullptr, nullptr, nullptr),
	CastInst::BitCast);

	// Source and destination have unknown sizes, but the same address space and
	// the intermediate int is not the maximum pointer size -> nothing
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
	CastInst::IntToPtr,
	Int64PtrTy, Int32Ty, Int64PtrTy,
	nullptr, nullptr, nullptr),
	0U);

	// Middle pointer big enough -> bitcast.
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
	CastInst::PtrToInt,
	Int64Ty, Int64PtrTy, Int64Ty,
	nullptr, Int64Ty, nullptr),
	CastInst::BitCast);

	// Middle pointer too small -> fail.
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
	CastInst::PtrToInt,
	Int64Ty, Int64PtrTy, Int64Ty,
	nullptr, Int32Ty, nullptr),
	0U);

	// Test that we don't eliminate bitcasts between different address spaces,
	// or if we don't have available pointer size information.
	DataLayout DL("e-p:32:32:32-p1:16:16:16-p2:64:64:64-i1:8:8-i8:8:8-i16:16:16"
	"-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64"
	"-v128:128:128-a:0:64-s:64:64-f80:128:128-n8:16:32:64-S128");

	Type* Int64PtrTyAS1 = Type::getInt64PtrTy(C, 1);
	Type* Int64PtrTyAS2 = Type::getInt64PtrTy(C, 2);

	IntegerType *Int16SizePtr = DL.getIntPtrType(C, 1);
	IntegerType *Int64SizePtr = DL.getIntPtrType(C, 2);

	// Cannot simplify inttoptr, addrspacecast
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
	CastInst::AddrSpaceCast,
	Int16Ty, Int64PtrTyAS1, Int64PtrTyAS2,
	nullptr, Int16SizePtr, Int64SizePtr),
	0U);

	// Cannot simplify addrspacecast, ptrtoint
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::AddrSpaceCast,
	CastInst::PtrToInt,
	Int64PtrTyAS1, Int64PtrTyAS2, Int16Ty,
	Int64SizePtr, Int16SizePtr, nullptr),
	0U);

	// Pass since the bitcast address spaces are the same
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
	CastInst::BitCast,
	Int16Ty, Int64PtrTyAS1, Int64PtrTyAS1,
	nullptr, nullptr, nullptr),
	CastInst::IntToPtr);

	}

	TEST(InstructionsTest, CloneCall) {
	LLVMContext &C(getGlobalContext());
	Type *Int32Ty = Type::getInt32Ty(C);
	Type *ArgTys[] = {Int32Ty, Int32Ty, Int32Ty};
	Type FnTy = FunctionType::get(Int32Ty, ArgTys, /isVarArg=*/false);
	Value *Callee = Constant::getNullValue(FnTy->getPointerTo());
	Value *Args[] = {
	ConstantInt::get(Int32Ty, 1),
	ConstantInt::get(Int32Ty, 2),
	ConstantInt::get(Int32Ty, 3)
	};
	std::unique_ptr<CallInst> Call(CallInst::Create(Callee, Args, "result"));

	// Test cloning the tail call kind.
	CallInst::TailCallKind Kinds[] = {CallInst::TCK_None, CallInst::TCK_Tail,
	CallInst::TCK_MustTail};
	for (CallInst::TailCallKind TCK : Kinds) {
	Call->setTailCallKind(TCK);
	std::unique_ptr<CallInst> Clone(cast<CallInst>(Call->clone()));
	EXPECT_EQ(Call->getTailCallKind(), Clone->getTailCallKind());
	}
	Call->setTailCallKind(CallInst::TCK_None);

	// Test cloning an attribute.
	{
	AttrBuilder AB;
	AB.addAttribute(Attribute::ReadOnly);
	Call->setAttributes(AttributeSet::get(C, AttributeSet::FunctionIndex, AB));
	std::unique_ptr<CallInst> Clone(cast<CallInst>(Call->clone()));
	EXPECT_TRUE(Clone->onlyReadsMemory());
	}
	}

	} // end anonymous namespace
	} // end namespace llvm