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//===- IntegerDivision.cpp - Unit tests for the integer division code -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/Utils/IntegerDivision.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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TEST(IntegerDivision, SDiv) {
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LLVMContext C;
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Module M("test division", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Div = Builder.CreateSDiv(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::SDiv);
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Value *Ret = Builder.CreateRet(Div);
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expandDivision(cast<BinaryOperator>(Div));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::AShr);
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Instruction* Quotient = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Quotient && Quotient->getOpcode() == Instruction::Sub);
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}
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TEST(IntegerDivision, UDiv) {
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LLVMContext C;
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Module M("test division", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Div = Builder.CreateUDiv(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::UDiv);
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Value *Ret = Builder.CreateRet(Div);
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expandDivision(cast<BinaryOperator>(Div));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::ICmp);
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Instruction* Quotient = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Quotient && Quotient->getOpcode() == Instruction::PHI);
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}
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TEST(IntegerDivision, SRem) {
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LLVMContext C;
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Module M("test remainder", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Rem = Builder.CreateSRem(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::SRem);
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Value *Ret = Builder.CreateRet(Rem);
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expandRemainder(cast<BinaryOperator>(Rem));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::AShr);
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Instruction* Remainder = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Remainder && Remainder->getOpcode() == Instruction::Sub);
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}
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TEST(IntegerDivision, URem) {
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LLVMContext C;
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Module M("test remainder", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Rem = Builder.CreateURem(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::URem);
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Value *Ret = Builder.CreateRet(Rem);
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expandRemainder(cast<BinaryOperator>(Rem));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::ICmp);
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Instruction* Remainder = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Remainder && Remainder->getOpcode() == Instruction::Sub);
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}
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TEST(IntegerDivision, SDiv64) {
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LLVMContext C;
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Module M("test division", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Div = Builder.CreateSDiv(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::SDiv);
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Value *Ret = Builder.CreateRet(Div);
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expandDivision(cast<BinaryOperator>(Div));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::AShr);
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Instruction* Quotient = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Quotient && Quotient->getOpcode() == Instruction::Sub);
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}
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TEST(IntegerDivision, UDiv64) {
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LLVMContext C;
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Module M("test division", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Div = Builder.CreateUDiv(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::UDiv);
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Value *Ret = Builder.CreateRet(Div);
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expandDivision(cast<BinaryOperator>(Div));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::ICmp);
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Instruction* Quotient = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Quotient && Quotient->getOpcode() == Instruction::PHI);
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}
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TEST(IntegerDivision, SRem64) {
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LLVMContext C;
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Module M("test remainder", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Rem = Builder.CreateSRem(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::SRem);
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Value *Ret = Builder.CreateRet(Rem);
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expandRemainder(cast<BinaryOperator>(Rem));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::AShr);
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Instruction* Remainder = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Remainder && Remainder->getOpcode() == Instruction::Sub);
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}
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TEST(IntegerDivision, URem64) {
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LLVMContext C;
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Module M("test remainder", C);
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IRBuilder<> Builder(C);
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SmallVector<Type*, 2> ArgTys(2, Builder.getInt64Ty());
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Function *F = Function::Create(FunctionType::get(Builder.getInt64Ty(),
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ArgTys, false),
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GlobalValue::ExternalLinkage, "F", &M);
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assert(F->arg_size() == 2);
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BasicBlock *BB = BasicBlock::Create(C, "", F);
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Builder.SetInsertPoint(BB);
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Function::arg_iterator AI = F->arg_begin();
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Value *A = &*AI++;
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Value *B = &*AI++;
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Value *Rem = Builder.CreateURem(A, B);
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::URem);
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Value *Ret = Builder.CreateRet(Rem);
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expandRemainder(cast<BinaryOperator>(Rem));
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EXPECT_TRUE(BB->front().getOpcode() == Instruction::ICmp);
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Instruction* Remainder = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
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EXPECT_TRUE(Remainder && Remainder->getOpcode() == Instruction::Sub);
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}
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}
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