98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
//===- 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/Transforms/Utils/Local.h"
|
|
#include "llvm/IR/BasicBlock.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
TEST(Local, RecursivelyDeleteDeadPHINodes) {
|
|
LLVMContext C;
|
|
|
|
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;
|
|
}
|
|
|
|
TEST(Local, RemoveDuplicatePHINodes) {
|
|
LLVMContext C;
|
|
IRBuilder<> B(C);
|
|
|
|
std::unique_ptr<Function> F(
|
|
Function::Create(FunctionType::get(B.getVoidTy(), false),
|
|
GlobalValue::ExternalLinkage, "F"));
|
|
BasicBlock *Entry(BasicBlock::Create(C, "", F.get()));
|
|
BasicBlock *BB(BasicBlock::Create(C, "", F.get()));
|
|
BranchInst::Create(BB, Entry);
|
|
|
|
B.SetInsertPoint(BB);
|
|
|
|
AssertingVH<PHINode> P1 = B.CreatePHI(Type::getInt32Ty(C), 2);
|
|
P1->addIncoming(B.getInt32(42), Entry);
|
|
|
|
PHINode *P2 = B.CreatePHI(Type::getInt32Ty(C), 2);
|
|
P2->addIncoming(B.getInt32(42), Entry);
|
|
|
|
AssertingVH<PHINode> P3 = B.CreatePHI(Type::getInt32Ty(C), 2);
|
|
P3->addIncoming(B.getInt32(42), Entry);
|
|
P3->addIncoming(B.getInt32(23), BB);
|
|
|
|
PHINode *P4 = B.CreatePHI(Type::getInt32Ty(C), 2);
|
|
P4->addIncoming(B.getInt32(42), Entry);
|
|
P4->addIncoming(B.getInt32(23), BB);
|
|
|
|
P1->addIncoming(P3, BB);
|
|
P2->addIncoming(P4, BB);
|
|
BranchInst::Create(BB, BB);
|
|
|
|
// Verify that we can eliminate PHIs that become duplicates after chaning PHIs
|
|
// downstream.
|
|
EXPECT_TRUE(EliminateDuplicatePHINodes(BB));
|
|
EXPECT_EQ(3U, BB->size());
|
|
}
|