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//===- Local.cpp - Unit tests for Local -----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/BasicBlock.h"
#include "llvm/IRBuilder.h"
#include "llvm/Instructions.h"
#include "llvm/LLVMContext.h"
#include "llvm/Transforms/Utils/Local.h"
#include "gtest/gtest.h"
using namespace llvm;
TEST(Local, RecursivelyDeleteDeadPHINodes) {
LLVMContext &C(getGlobalContext());
IRBuilder<> builder(C);
// Make blocks
BasicBlock *bb0 = BasicBlock::Create(C);
BasicBlock *bb1 = BasicBlock::Create(C);
builder.SetInsertPoint(bb0);
PHINode *phi = builder.CreatePHI(Type::getInt32Ty(C), 2);
BranchInst *br0 = builder.CreateCondBr(builder.getTrue(), bb0, bb1);
builder.SetInsertPoint(bb1);
BranchInst *br1 = builder.CreateBr(bb0);
phi->addIncoming(phi, bb0);
phi->addIncoming(phi, bb1);
// The PHI will be removed
EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
// Make sure the blocks only contain the branches
EXPECT_EQ(&bb0->front(), br0);
EXPECT_EQ(&bb1->front(), br1);
builder.SetInsertPoint(bb0);
phi = builder.CreatePHI(Type::getInt32Ty(C), 0);
EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
builder.SetInsertPoint(bb0);
phi = builder.CreatePHI(Type::getInt32Ty(C), 0);
builder.CreateAdd(phi, phi);
EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
bb0->dropAllReferences();
bb1->dropAllReferences();
delete bb0;
delete bb1;
}
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