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/BasicBlock.h"
  11 #include "llvm/DataLayout.h"
  12 #include "llvm/Function.h"
  13 #include "llvm/IRBuilder.h"
  14 #include "llvm/IntrinsicInst.h"
  15 #include "llvm/LLVMContext.h"
  16 #include "llvm/MDBuilder.h"
  17 #include "llvm/Module.h"
  18 #include "llvm/ADT/OwningPtr.h"
  19
  20 #include "gtest/gtest.h"
  21
  22 using namespace llvm;
  23
  24 namespace {
  25
  26 class IRBuilderTest : public testing::Test {
  27 protected:
  28   virtual void SetUp() {
  29     M.reset(new Module("MyModule", getGlobalContext()));
  30     FunctionType *FTy = FunctionType::get(Type::getVoidTy(getGlobalContext()),
  31                                           /*isVarArg=*/false);
  32     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
  33     BB = BasicBlock::Create(getGlobalContext(), "", F);
  34     GV = new GlobalVariable(Type::getFloatTy(getGlobalContext()), true,
  35                             GlobalValue::ExternalLinkage);
  36   }
  37
  38   virtual void TearDown() {
  39     BB = 0;
  40     M.reset();
  41   }
  42
  43   OwningPtr<Module> M;
  44   Function *F;
  45   BasicBlock *BB;
  46   GlobalVariable *GV;
  47 };
  48
  49 TEST_F(IRBuilderTest, Lifetime) {
  50   IRBuilder<> Builder(BB);
  51   AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty());
  52   AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty());
  53   AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(),
  54                                           Builder.getInt32(123));
  55
  56   CallInst *Start1 = Builder.CreateLifetimeStart(Var1);
  57   CallInst *Start2 = Builder.CreateLifetimeStart(Var2);
  58   CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100));
  59
  60   EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1));
  61   EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1));
  62   EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100));
  63
  64   EXPECT_EQ(Start1->getArgOperand(1), Var1);
  65   EXPECT_NE(Start2->getArgOperand(1), Var2);
  66   EXPECT_EQ(Start3->getArgOperand(1), Var3);
  67
  68   Value *End1 = Builder.CreateLifetimeEnd(Var1);
  69   Builder.CreateLifetimeEnd(Var2);
  70   Builder.CreateLifetimeEnd(Var3);
  71
  72   IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1);
  73   IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1);
  74   ASSERT_TRUE(II_Start1 != NULL);
  75   EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start);
  76   ASSERT_TRUE(II_End1 != NULL);
  77   EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end);
  78 }
  79
  80 TEST_F(IRBuilderTest, CreateCondBr) {
  81   IRBuilder<> Builder(BB);
  82   BasicBlock *TBB = BasicBlock::Create(getGlobalContext(), "", F);
  83   BasicBlock *FBB = BasicBlock::Create(getGlobalContext(), "", F);
  84
  85   BranchInst *BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB);
  86   TerminatorInst *TI = BB->getTerminator();
  87   EXPECT_EQ(BI, TI);
  88   EXPECT_EQ(2u, TI->getNumSuccessors());
  89   EXPECT_EQ(TBB, TI->getSuccessor(0));
  90   EXPECT_EQ(FBB, TI->getSuccessor(1));
  91
  92   BI->eraseFromParent();
  93   MDNode *Weights = MDBuilder(getGlobalContext()).createBranchWeights(42, 13);
  94   BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB, Weights);
  95   TI = BB->getTerminator();
  96   EXPECT_EQ(BI, TI);
  97   EXPECT_EQ(2u, TI->getNumSuccessors());
  98   EXPECT_EQ(TBB, TI->getSuccessor(0));
  99   EXPECT_EQ(FBB, TI->getSuccessor(1));
 100   EXPECT_EQ(Weights, TI->getMetadata(LLVMContext::MD_prof));
 101 }
 102
 103 TEST_F(IRBuilderTest, GetIntTy) {
 104   IRBuilder<> Builder(BB);
 105   IntegerType *Ty1 = Builder.getInt1Ty();
 106   EXPECT_EQ(Ty1, IntegerType::get(getGlobalContext(), 1));
 107
 108   DataLayout* DL = new DataLayout(M.get());
 109   IntegerType *IntPtrTy = Builder.getIntPtrTy(DL);
 110   unsigned IntPtrBitSize =  DL->getPointerSizeInBits(0);
 111   EXPECT_EQ(IntPtrTy, IntegerType::get(getGlobalContext(), IntPtrBitSize));
 112 }
 113
 114 TEST_F(IRBuilderTest, FastMathFlags) {
 115   IRBuilder<> Builder(BB);
 116   Value *F;
 117   Instruction *FDiv, *FAdd;
 118
 119   F = Builder.CreateLoad(GV);
 120   F = Builder.CreateFAdd(F, F);
 121
 122   EXPECT_FALSE(Builder.getFastMathFlags().any());
 123   ASSERT_TRUE(isa<Instruction>(F));
 124   FAdd = cast<Instruction>(F);
 125   EXPECT_FALSE(FAdd->hasNoNaNs());
 126
 127   FastMathFlags FMF;
 128   Builder.SetFastMathFlags(FMF);
 129
 130   F = Builder.CreateFAdd(F, F);
 131   EXPECT_FALSE(Builder.getFastMathFlags().any());
 132
 133   FMF.UnsafeAlgebra = true;
 134   Builder.SetFastMathFlags(FMF);
 135
 136   F = Builder.CreateFAdd(F, F);
 137   EXPECT_TRUE(Builder.getFastMathFlags().any());
 138   ASSERT_TRUE(isa<Instruction>(F));
 139   FAdd = cast<Instruction>(F);
 140   EXPECT_TRUE(FAdd->hasNoNaNs());
 141
 142   F = Builder.CreateFDiv(F, F);
 143   EXPECT_TRUE(Builder.getFastMathFlags().any());
 144   EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra);
 145   ASSERT_TRUE(isa<Instruction>(F));
 146   FDiv = cast<Instruction>(F);
 147   EXPECT_TRUE(FDiv->hasAllowReciprocal());
 148
 149   Builder.clearFastMathFlags();
 150
 151   F = Builder.CreateFDiv(F, F);
 152   ASSERT_TRUE(isa<Instruction>(F));
 153   FDiv = cast<Instruction>(F);
 154   EXPECT_FALSE(FDiv->hasAllowReciprocal());
 155
 156   FMF.clear();
 157   FMF.AllowReciprocal = true;
 158   Builder.SetFastMathFlags(FMF);
 159
 160   F = Builder.CreateFDiv(F, F);
 161   EXPECT_TRUE(Builder.getFastMathFlags().any());
 162   EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
 163   ASSERT_TRUE(isa<Instruction>(F));
 164   FDiv = cast<Instruction>(F);
 165   EXPECT_TRUE(FDiv->hasAllowReciprocal());
 166
 167   Builder.clearFastMathFlags();
 168
 169   F = Builder.CreateFDiv(F, F);
 170   ASSERT_TRUE(isa<Instruction>(F));
 171   FDiv = cast<Instruction>(F);
 172   EXPECT_FALSE(FDiv->getFastMathFlags().any());
 173   FDiv->copyFastMathFlags(FAdd);
 174   EXPECT_TRUE(FDiv->hasNoNaNs());
 175
 176 }
 177
 178 }