IntegerDivision.cpp revision e5510db57c86a618cbf9c7513e03f34e7e40a1fd 
1//===- IntegerDivision.cpp - Unit tests for the integer division code -----===//
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 "gtest/gtest.h"
11#include "llvm/BasicBlock.h"
12#include "llvm/GlobalValue.h"
13#include "llvm/Function.h"
14#include "llvm/IRBuilder.h"
15#include "llvm/Module.h"
16#include "llvm/Transforms/Utils/IntegerDivision.h"
17
18using namespace llvm;
19
20namespace {
21
22TEST(IntegerDivision, SDiv) {
23  LLVMContext &C(getGlobalContext());
24  Module M("test division", C);
25  IRBuilder<> Builder(C);
26
27  SmallVector<Type*, 2> ArgTys(2, Builder.getInt32Ty());
28  Function *F = Function::Create(FunctionType::get(Builder.getInt32Ty(),
29                                                   ArgTys, false),
30                                 GlobalValue::ExternalLinkage, "F", &M);
31  assert(F->getArgumentList().size() == 2);
32
33  BasicBlock *BB = BasicBlock::Create(C, "", F);
34  Builder.SetInsertPoint(BB);
35
36  Function::arg_iterator AI = F->arg_begin();
37  Value *A = AI++;
38  Value *B = AI++;
39
40  Value *Div = Builder.CreateSDiv(A, B);
41  EXPECT_TRUE(BB->front().getOpcode() == Instruction::SDiv);
42
43  Value *Ret = Builder.CreateRet(Div);
44
45  expandDivision(cast<BinaryOperator>(Div));
46  EXPECT_TRUE(BB->front().getOpcode() == Instruction::AShr);
47
48  Instruction* Quotient = dyn_cast<Instruction>(cast<User>(Ret)->getOperand(0));
49  EXPECT_TRUE(Quotient && Quotient->getOpcode() == Instruction::Sub);
50
51  Builder.SetInsertPoint(BB->end());
52}
53
54}
55