unittests/IR/IRBuilderTest.cpp

   1 //===- llvm/unittest/IR/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/IR/IRBuilder.h"
  11 #include "llvm/ADT/OwningPtr.h"
  12 #include "llvm/IR/BasicBlock.h"
  13 #include "llvm/IR/DataLayout.h"
  14 #include "llvm/IR/Function.h"
  15 #include "llvm/IR/IntrinsicInst.h"
  16 #include "llvm/IR/LLVMContext.h"
  17 #include "llvm/IR/MDBuilder.h"
  18 #include "llvm/IR/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", Ctx));
  29     FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
  30                                           /*isVarArg=*/false);
  31     F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
  32     BB = BasicBlock::Create(Ctx, "", F);
  33     GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true,
  34                             GlobalValue::ExternalLinkage, 0);
  35   }
  36
  37   virtual void TearDown() {
  38     BB = 0;
  39     M.reset();
  40   }
  41
  42   LLVMContext Ctx;
  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(Ctx, "", F);
  83   BasicBlock *FBB = BasicBlock::Create(Ctx, "", 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(Ctx).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, LandingPadName) {
 104   IRBuilder<> Builder(BB);
 105   LandingPadInst *LP = Builder.CreateLandingPad(Builder.getInt32Ty(),
 106                                                 Builder.getInt32(0), 0, "LP");
 107   EXPECT_EQ(LP->getName(), "LP");
 108 }
 109
 110 TEST_F(IRBuilderTest, GetIntTy) {
 111   IRBuilder<> Builder(BB);
 112   IntegerType *Ty1 = Builder.getInt1Ty();
 113   EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1));
 114
 115   DataLayout* DL = new DataLayout(M.get());
 116   IntegerType *IntPtrTy = Builder.getIntPtrTy(DL);
 117   unsigned IntPtrBitSize =  DL->getPointerSizeInBits(0);
 118   EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize));
 119   delete DL;
 120 }
 121
 122 TEST_F(IRBuilderTest, FastMathFlags) {
 123   IRBuilder<> Builder(BB);
 124   Value *F;
 125   Instruction *FDiv, *FAdd;
 126
 127   F = Builder.CreateLoad(GV);
 128   F = Builder.CreateFAdd(F, F);
 129
 130   EXPECT_FALSE(Builder.getFastMathFlags().any());
 131   ASSERT_TRUE(isa<Instruction>(F));
 132   FAdd = cast<Instruction>(F);
 133   EXPECT_FALSE(FAdd->hasNoNaNs());
 134
 135   FastMathFlags FMF;
 136   Builder.SetFastMathFlags(FMF);
 137
 138   F = Builder.CreateFAdd(F, F);
 139   EXPECT_FALSE(Builder.getFastMathFlags().any());
 140
 141   FMF.setUnsafeAlgebra();
 142   Builder.SetFastMathFlags(FMF);
 143
 144   F = Builder.CreateFAdd(F, F);
 145   EXPECT_TRUE(Builder.getFastMathFlags().any());
 146   ASSERT_TRUE(isa<Instruction>(F));
 147   FAdd = cast<Instruction>(F);
 148   EXPECT_TRUE(FAdd->hasNoNaNs());
 149
 150   F = Builder.CreateFDiv(F, F);
 151   EXPECT_TRUE(Builder.getFastMathFlags().any());
 152   EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra);
 153   ASSERT_TRUE(isa<Instruction>(F));
 154   FDiv = cast<Instruction>(F);
 155   EXPECT_TRUE(FDiv->hasAllowReciprocal());
 156
 157   Builder.clearFastMathFlags();
 158
 159   F = Builder.CreateFDiv(F, F);
 160   ASSERT_TRUE(isa<Instruction>(F));
 161   FDiv = cast<Instruction>(F);
 162   EXPECT_FALSE(FDiv->hasAllowReciprocal());
 163
 164   FMF.clear();
 165   FMF.setAllowReciprocal();
 166   Builder.SetFastMathFlags(FMF);
 167
 168   F = Builder.CreateFDiv(F, F);
 169   EXPECT_TRUE(Builder.getFastMathFlags().any());
 170   EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
 171   ASSERT_TRUE(isa<Instruction>(F));
 172   FDiv = cast<Instruction>(F);
 173   EXPECT_TRUE(FDiv->hasAllowReciprocal());
 174
 175   Builder.clearFastMathFlags();
 176
 177   F = Builder.CreateFDiv(F, F);
 178   ASSERT_TRUE(isa<Instruction>(F));
 179   FDiv = cast<Instruction>(F);
 180   EXPECT_FALSE(FDiv->getFastMathFlags().any());
 181   FDiv->copyFastMathFlags(FAdd);
 182   EXPECT_TRUE(FDiv->hasNoNaNs());
 183
 184 }
 185
 186 TEST_F(IRBuilderTest, RAIIHelpersTest) {
 187   IRBuilder<> Builder(BB);
 188   EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal());
 189   MDBuilder MDB(M->getContext());
 190
 191   MDNode *FPMathA = MDB.createFPMath(0.01f);
 192   MDNode *FPMathB = MDB.createFPMath(0.1f);
 193
 194   Builder.SetDefaultFPMathTag(FPMathA);
 195
 196   {
 197     IRBuilder<>::FastMathFlagGuard Guard(Builder);
 198     FastMathFlags FMF;
 199     FMF.setAllowReciprocal();
 200     Builder.SetFastMathFlags(FMF);
 201     Builder.SetDefaultFPMathTag(FPMathB);
 202     EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal());
 203     EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag());
 204   }
 205
 206   EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal());
 207   EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag());
 208
 209   Value *F = Builder.CreateLoad(GV);
 210
 211   {
 212     IRBuilder<>::InsertPointGuard Guard(Builder);
 213     Builder.SetInsertPoint(cast<Instruction>(F));
 214     EXPECT_EQ(F, Builder.GetInsertPoint());
 215   }
 216
 217   EXPECT_EQ(BB->end(), Builder.GetInsertPoint());
 218   EXPECT_EQ(BB, Builder.GetInsertBlock());
 219 }
 220
 221
 222 }