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61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
//===- Local.cpp - Unit tests for Local -----------------------------------===//
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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 "gtest/gtest.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/Instructions.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Support/IRBuilder.h"
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#include "llvm/Transforms/Utils/Local.h"
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using namespace llvm;
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TEST(Local, RecursivelyDeleteDeadPHINodes) {
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LLVMContext &C(getGlobalContext());
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IRBuilder<> builder(C);
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// Make blocks
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BasicBlock *bb0 = BasicBlock::Create(C);
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BasicBlock *bb1 = BasicBlock::Create(C);
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builder.SetInsertPoint(bb0);
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PHINode *phi = builder.CreatePHI(Type::getInt32Ty(C), 2);
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BranchInst *br0 = builder.CreateCondBr(builder.getTrue(), bb0, bb1);
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builder.SetInsertPoint(bb1);
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BranchInst *br1 = builder.CreateBr(bb0);
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phi->addIncoming(phi, bb0);
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phi->addIncoming(phi, bb1);
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// The PHI will be removed
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EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
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// Make sure the blocks only contain the branches
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EXPECT_EQ(&bb0->front(), br0);
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EXPECT_EQ(&bb1->front(), br1);
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builder.SetInsertPoint(bb0);
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phi = builder.CreatePHI(Type::getInt32Ty(C), 0);
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EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
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builder.SetInsertPoint(bb0);
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phi = builder.CreatePHI(Type::getInt32Ty(C), 0);
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builder.CreateAdd(phi, phi);
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EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
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bb0->dropAllReferences();
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bb1->dropAllReferences();
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delete bb0;
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delete bb1;
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}
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