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 // Now, try it with CreateBinOp 151 F = Builder.CreateBinOp(Instruction::FAdd, F, F); 152 EXPECT_TRUE(Builder.getFastMathFlags().any()); 153 ASSERT_TRUE(isa<Instruction>(F)); 154 FAdd = cast<Instruction>(F); 155 EXPECT_TRUE(FAdd->hasNoNaNs()); 156 157 F = Builder.CreateFDiv(F, F); 158 EXPECT_TRUE(Builder.getFastMathFlags().any()); 159 EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra); 160 ASSERT_TRUE(isa<Instruction>(F)); 161 FDiv = cast<Instruction>(F); 162 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 163 164 Builder.clearFastMathFlags(); 165 166 F = Builder.CreateFDiv(F, F); 167 ASSERT_TRUE(isa<Instruction>(F)); 168 FDiv = cast<Instruction>(F); 169 EXPECT_FALSE(FDiv->hasAllowReciprocal()); 170 171 FMF.clear(); 172 FMF.setAllowReciprocal(); 173 Builder.SetFastMathFlags(FMF); 174 175 F = Builder.CreateFDiv(F, F); 176 EXPECT_TRUE(Builder.getFastMathFlags().any()); 177 EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal); 178 ASSERT_TRUE(isa<Instruction>(F)); 179 FDiv = cast<Instruction>(F); 180 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 181 182 Builder.clearFastMathFlags(); 183 184 F = Builder.CreateFDiv(F, F); 185 ASSERT_TRUE(isa<Instruction>(F)); 186 FDiv = cast<Instruction>(F); 187 EXPECT_FALSE(FDiv->getFastMathFlags().any()); 188 FDiv->copyFastMathFlags(FAdd); 189 EXPECT_TRUE(FDiv->hasNoNaNs()); 190 191 } 192 193 TEST_F(IRBuilderTest, RAIIHelpersTest) { 194 IRBuilder<> Builder(BB); 195 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 196 MDBuilder MDB(M->getContext()); 197 198 MDNode *FPMathA = MDB.createFPMath(0.01f); 199 MDNode *FPMathB = MDB.createFPMath(0.1f); 200 201 Builder.SetDefaultFPMathTag(FPMathA); 202 203 { 204 IRBuilder<>::FastMathFlagGuard Guard(Builder); 205 FastMathFlags FMF; 206 FMF.setAllowReciprocal(); 207 Builder.SetFastMathFlags(FMF); 208 Builder.SetDefaultFPMathTag(FPMathB); 209 EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal()); 210 EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag()); 211 } 212 213 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 214 EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag()); 215 216 Value *F = Builder.CreateLoad(GV); 217 218 { 219 IRBuilder<>::InsertPointGuard Guard(Builder); 220 Builder.SetInsertPoint(cast<Instruction>(F)); 221 EXPECT_EQ(F, Builder.GetInsertPoint()); 222 } 223 224 EXPECT_EQ(BB->end(), Builder.GetInsertPoint()); 225 EXPECT_EQ(BB, Builder.GetInsertBlock()); 226 } 227 228 229 } 230