unittests/IR/InstructionsTest.cpp - platform/external/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/IRBuilder.h"
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/MDBuilder.h"
 #include "llvm/IR/Operator.h"
 #include "gtest/gtest.h"

 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(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(), llvm::next(b0->op_begin()));

   EXPECT_EQ(b0->op_end(), llvm::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* Int64Ty = Type::getInt64Ty(C);
   Type* V8x8Ty = VectorType::get(Int8Ty, 8);
   Type* V8x64Ty = VectorType::get(Int64Ty, 8);
   Type* X86MMXTy = Type::getX86_MMXTy(C);

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

   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));
 }


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

   // Type Definitions
   PointerType *Ptri8Ty = PointerType::get(IntegerType::get(C, 8), 0);
   PointerType *Ptri32Ty = PointerType::get(IntegerType::get(C, 8), 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(PtrVecA, C2xi32a);
   GetElementPtrInst *Gep1 = GetElementPtrInst::Create(PtrVecA, C2xi32b);
   GetElementPtrInst *Gep2 = GetElementPtrInst::Create(PtrVecB, C2xi32a);
   GetElementPtrInst *Gep3 = GetElementPtrInst::Create(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-a0:0:64-s0:64:64-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(Gep0, C2xi32b);
   GetElementPtrInst *GepII1 = GetElementPtrInst::Create(Gep1, C2xi32a);
   GetElementPtrInst *GepII2 = GetElementPtrInst::Create(Gep2, C2xi32b);
   GetElementPtrInst *GepII3 = GetElementPtrInst::Create(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* 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, 0, Int32Ty),
             CastInst::BitCast);

   // Source and destination pointers have different sizes -> fail.
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
                                            CastInst::IntToPtr,
                                            Int64PtrTy, Int64Ty, Int64PtrTy,
                                            Int32Ty, 0, Int64Ty),
             0U);

   // Middle pointer big enough -> bitcast.
   EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
                                            CastInst::PtrToInt,
                                            Int64Ty, Int64PtrTy, Int64Ty,
                                            0, Int64Ty, 0),
             CastInst::BitCast);

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

 }  // 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/IRBuilder.h"
	#include "llvm/IR/LLVMContext.h"
	#include "llvm/IR/MDBuilder.h"
	#include "llvm/IR/Operator.h"
	#include "gtest/gtest.h"

	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(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(), llvm::next(b0->op_begin()));

	EXPECT_EQ(b0->op_end(), llvm::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* Int64Ty = Type::getInt64Ty(C);
	Type* V8x8Ty = VectorType::get(Int8Ty, 8);
	Type* V8x64Ty = VectorType::get(Int64Ty, 8);
	Type* X86MMXTy = Type::getX86_MMXTy(C);

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

	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));
	}



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

	// Type Definitions
	PointerType *Ptri8Ty = PointerType::get(IntegerType::get(C, 8), 0);
	PointerType *Ptri32Ty = PointerType::get(IntegerType::get(C, 8), 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(PtrVecA, C2xi32a);
	GetElementPtrInst *Gep1 = GetElementPtrInst::Create(PtrVecA, C2xi32b);
	GetElementPtrInst *Gep2 = GetElementPtrInst::Create(PtrVecB, C2xi32a);
	GetElementPtrInst *Gep3 = GetElementPtrInst::Create(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-a0:0:64-s0:64:64-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(Gep0, C2xi32b);
	GetElementPtrInst *GepII1 = GetElementPtrInst::Create(Gep1, C2xi32a);
	GetElementPtrInst *GepII2 = GetElementPtrInst::Create(Gep2, C2xi32b);
	GetElementPtrInst *GepII3 = GetElementPtrInst::Create(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* 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, 0, Int32Ty),
	CastInst::BitCast);

	// Source and destination pointers have different sizes -> fail.
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::PtrToInt,
	CastInst::IntToPtr,
	Int64PtrTy, Int64Ty, Int64PtrTy,
	Int32Ty, 0, Int64Ty),
	0U);

	// Middle pointer big enough -> bitcast.
	EXPECT_EQ(CastInst::isEliminableCastPair(CastInst::IntToPtr,
	CastInst::PtrToInt,
	Int64Ty, Int64PtrTy, Int64Ty,
	0, Int64Ty, 0),
	CastInst::BitCast);

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

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