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annotate unittests/Transforms/Utils/Local.cpp @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children afa8332a0e37
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1 //===- Local.cpp - Unit tests for Local -----------------------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #include "llvm/Transforms/Utils/Local.h"
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11 #include "llvm/IR/BasicBlock.h"
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12 #include "llvm/IR/IRBuilder.h"
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13 #include "llvm/IR/Instructions.h"
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14 #include "llvm/IR/LLVMContext.h"
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15 #include "gtest/gtest.h"
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16
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17 using namespace llvm;
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18
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19 TEST(Local, RecursivelyDeleteDeadPHINodes) {
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20 LLVMContext &C(getGlobalContext());
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21
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22 IRBuilder<> builder(C);
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23
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24 // Make blocks
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25 BasicBlock *bb0 = BasicBlock::Create(C);
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26 BasicBlock *bb1 = BasicBlock::Create(C);
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27
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28 builder.SetInsertPoint(bb0);
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29 PHINode *phi = builder.CreatePHI(Type::getInt32Ty(C), 2);
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30 BranchInst *br0 = builder.CreateCondBr(builder.getTrue(), bb0, bb1);
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31
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32 builder.SetInsertPoint(bb1);
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33 BranchInst *br1 = builder.CreateBr(bb0);
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34
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35 phi->addIncoming(phi, bb0);
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36 phi->addIncoming(phi, bb1);
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37
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38 // The PHI will be removed
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39 EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
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40
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41 // Make sure the blocks only contain the branches
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42 EXPECT_EQ(&bb0->front(), br0);
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43 EXPECT_EQ(&bb1->front(), br1);
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44
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45 builder.SetInsertPoint(bb0);
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46 phi = builder.CreatePHI(Type::getInt32Ty(C), 0);
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47
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48 EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
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49
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50 builder.SetInsertPoint(bb0);
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51 phi = builder.CreatePHI(Type::getInt32Ty(C), 0);
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52 builder.CreateAdd(phi, phi);
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53
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54 EXPECT_TRUE(RecursivelyDeleteDeadPHINode(phi));
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55
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56 bb0->dropAllReferences();
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57 bb1->dropAllReferences();
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58 delete bb0;
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59 delete bb1;
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60 }