unittests/VMCore/IRBuilderTest.cpp

   1 //===- llvm/unittest/VMCore/IRBuilderTest.cpp - IRBuilder tests -----------===//
   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 "llvm/IRBuilder.h"
  11 #include "llvm/ADT/OwningPtr.h"
  12 #include "llvm/BasicBlock.h"
  13 #include "llvm/DataLayout.h"
  14 #include "llvm/Function.h"
  15 #include "llvm/IntrinsicInst.h"
  16 #include "llvm/LLVMContext.h"
  17 #include "llvm/MDBuilder.h"
  18 #include "llvm/Module.h"
  19 #include "gtest/gtest.h"
  20
  21 using namespace llvm;
  22
  23 namespace {
  24
  25 class IRBuilderTest : public testing::Test {
  26 protected:
  27   virtual void SetUp() {
  28     M.reset(new Module("MyModule", getGlobalContext()));
  29     FunctionType *FTy = FunctionType::get(Type::getVoidTy(getGlobalContext()),
  30                                           /*isVarArg=*/false);
  31     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
  32     BB = BasicBlock::Create(getGlobalContext(), "", F);
  33     GV = new GlobalVariable(Type::getFloatTy(getGlobalContext()), true,
  34                             GlobalValue::ExternalLinkage);
  35   }
  36
  37   virtual void TearDown() {
  38     BB = 0;
  39     M.reset();
  40   }
  41
  42   OwningPtr<Module> M;
  43   Function *F;
  44   BasicBlock *BB;
  45   GlobalVariable *GV;
  46 };
  47
  48 TEST_F(IRBuilderTest, Lifetime) {
  49   IRBuilder<> Builder(BB);
  50   AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty());
  51   AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty());
  52   AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(),
  53                                           Builder.getInt32(123));
  54
  55   CallInst *Start1 = Builder.CreateLifetimeStart(Var1);
  56   CallInst *Start2 = Builder.CreateLifetimeStart(Var2);
  57   CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100));
  58
  59   EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1));
  60   EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1));
  61   EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100));
  62
  63   EXPECT_EQ(Start1->getArgOperand(1), Var1);
  64   EXPECT_NE(Start2->getArgOperand(1), Var2);
  65   EXPECT_EQ(Start3->getArgOperand(1), Var3);
  66
  67   Value *End1 = Builder.CreateLifetimeEnd(Var1);
  68   Builder.CreateLifetimeEnd(Var2);
  69   Builder.CreateLifetimeEnd(Var3);
  70
  71   IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1);
  72   IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1);
  73   ASSERT_TRUE(II_Start1 != NULL);
  74   EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start);
  75   ASSERT_TRUE(II_End1 != NULL);
  76   EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end);
  77 }
  78
  79 TEST_F(IRBuilderTest, CreateCondBr) {
  80   IRBuilder<> Builder(BB);
  81   BasicBlock *TBB = BasicBlock::Create(getGlobalContext(), "", F);
  82   BasicBlock *FBB = BasicBlock::Create(getGlobalContext(), "", F);
  83
  84   BranchInst *BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB);
  85   TerminatorInst *TI = BB->getTerminator();
  86   EXPECT_EQ(BI, TI);
  87   EXPECT_EQ(2u, TI->getNumSuccessors());
  88   EXPECT_EQ(TBB, TI->getSuccessor(0));
  89   EXPECT_EQ(FBB, TI->getSuccessor(1));
  90
  91   BI->eraseFromParent();
  92   MDNode *Weights = MDBuilder(getGlobalContext()).createBranchWeights(42, 13);
  93   BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB, Weights);
  94   TI = BB->getTerminator();
  95   EXPECT_EQ(BI, TI);
  96   EXPECT_EQ(2u, TI->getNumSuccessors());
  97   EXPECT_EQ(TBB, TI->getSuccessor(0));
  98   EXPECT_EQ(FBB, TI->getSuccessor(1));
  99   EXPECT_EQ(Weights, TI->getMetadata(LLVMContext::MD_prof));
 100 }
 101
 102 TEST_F(IRBuilderTest, GetIntTy) {
 103   IRBuilder<> Builder(BB);
 104   IntegerType *Ty1 = Builder.getInt1Ty();
 105   EXPECT_EQ(Ty1, IntegerType::get(getGlobalContext(), 1));
 106
 107   DataLayout* DL = new DataLayout(M.get());
 108   IntegerType *IntPtrTy = Builder.getIntPtrTy(DL);
 109   unsigned IntPtrBitSize =  DL->getPointerSizeInBits(0);
 110   EXPECT_EQ(IntPtrTy, IntegerType::get(getGlobalContext(), IntPtrBitSize));
 111 }
 112
 113 TEST_F(IRBuilderTest, FastMathFlags) {
 114   IRBuilder<> Builder(BB);
 115   Value *F;
 116   Instruction *FDiv, *FAdd;
 117
 118   F = Builder.CreateLoad(GV);
 119   F = Builder.CreateFAdd(F, F);
 120
 121   EXPECT_FALSE(Builder.getFastMathFlags().any());
 122   ASSERT_TRUE(isa<Instruction>(F));
 123   FAdd = cast<Instruction>(F);
 124   EXPECT_FALSE(FAdd->hasNoNaNs());
 125
 126   FastMathFlags FMF;
 127   Builder.SetFastMathFlags(FMF);
 128
 129   F = Builder.CreateFAdd(F, F);
 130   EXPECT_FALSE(Builder.getFastMathFlags().any());
 131
 132   FMF.UnsafeAlgebra = true;
 133   Builder.SetFastMathFlags(FMF);
 134
 135   F = Builder.CreateFAdd(F, F);
 136   EXPECT_TRUE(Builder.getFastMathFlags().any());
 137   ASSERT_TRUE(isa<Instruction>(F));
 138   FAdd = cast<Instruction>(F);
 139   EXPECT_TRUE(FAdd->hasNoNaNs());
 140
 141   F = Builder.CreateFDiv(F, F);
 142   EXPECT_TRUE(Builder.getFastMathFlags().any());
 143   EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra);
 144   ASSERT_TRUE(isa<Instruction>(F));
 145   FDiv = cast<Instruction>(F);
 146   EXPECT_TRUE(FDiv->hasAllowReciprocal());
 147
 148   Builder.clearFastMathFlags();
 149
 150   F = Builder.CreateFDiv(F, F);
 151   ASSERT_TRUE(isa<Instruction>(F));
 152   FDiv = cast<Instruction>(F);
 153   EXPECT_FALSE(FDiv->hasAllowReciprocal());
 154
 155   FMF.clear();
 156   FMF.AllowReciprocal = true;
 157   Builder.SetFastMathFlags(FMF);
 158
 159   F = Builder.CreateFDiv(F, F);
 160   EXPECT_TRUE(Builder.getFastMathFlags().any());
 161   EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
 162   ASSERT_TRUE(isa<Instruction>(F));
 163   FDiv = cast<Instruction>(F);
 164   EXPECT_TRUE(FDiv->hasAllowReciprocal());
 165
 166   Builder.clearFastMathFlags();
 167
 168   F = Builder.CreateFDiv(F, F);
 169   ASSERT_TRUE(isa<Instruction>(F));
 170   FDiv = cast<Instruction>(F);
 171   EXPECT_FALSE(FDiv->getFastMathFlags().any());
 172   FDiv->copyFastMathFlags(FAdd);
 173   EXPECT_TRUE(FDiv->hasNoNaNs());
 174
 175 }
 176
 177 }