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/IR/BasicBlock.h" 12 #include "llvm/IR/DataLayout.h" 13 #include "llvm/IR/Function.h" 14 #include "llvm/IR/IntrinsicInst.h" 15 #include "llvm/IR/LLVMContext.h" 16 #include "llvm/IR/MDBuilder.h" 17 #include "llvm/IR/Module.h" 18 #include "llvm/IR/NoFolder.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, nullptr); 35 } 36 37 virtual void TearDown() { 38 BB = nullptr; 39 M.reset(); 40 } 41 42 LLVMContext Ctx; 43 std::unique_ptr<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 != nullptr); 75 EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start); 76 ASSERT_TRUE(II_End1 != nullptr); 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, DataLayout) { 111 std::unique_ptr<Module> M(new Module("test", Ctx)); 112 M->setDataLayout("e-n32"); 113 EXPECT_TRUE(M->getDataLayout()->isLegalInteger(32)); 114 M->setDataLayout("e"); 115 EXPECT_FALSE(M->getDataLayout()->isLegalInteger(32)); 116 } 117 118 TEST_F(IRBuilderTest, GetIntTy) { 119 IRBuilder<> Builder(BB); 120 IntegerType *Ty1 = Builder.getInt1Ty(); 121 EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1)); 122 123 DataLayout* DL = new DataLayout(M.get()); 124 IntegerType *IntPtrTy = Builder.getIntPtrTy(DL); 125 unsigned IntPtrBitSize = DL->getPointerSizeInBits(0); 126 EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize)); 127 delete DL; 128 } 129 130 TEST_F(IRBuilderTest, FastMathFlags) { 131 IRBuilder<> Builder(BB); 132 Value *F; 133 Instruction *FDiv, *FAdd; 134 135 F = Builder.CreateLoad(GV); 136 F = Builder.CreateFAdd(F, F); 137 138 EXPECT_FALSE(Builder.getFastMathFlags().any()); 139 ASSERT_TRUE(isa<Instruction>(F)); 140 FAdd = cast<Instruction>(F); 141 EXPECT_FALSE(FAdd->hasNoNaNs()); 142 143 FastMathFlags FMF; 144 Builder.SetFastMathFlags(FMF); 145 146 F = Builder.CreateFAdd(F, F); 147 EXPECT_FALSE(Builder.getFastMathFlags().any()); 148 149 FMF.setUnsafeAlgebra(); 150 Builder.SetFastMathFlags(FMF); 151 152 F = Builder.CreateFAdd(F, F); 153 EXPECT_TRUE(Builder.getFastMathFlags().any()); 154 ASSERT_TRUE(isa<Instruction>(F)); 155 FAdd = cast<Instruction>(F); 156 EXPECT_TRUE(FAdd->hasNoNaNs()); 157 158 // Now, try it with CreateBinOp 159 F = Builder.CreateBinOp(Instruction::FAdd, F, F); 160 EXPECT_TRUE(Builder.getFastMathFlags().any()); 161 ASSERT_TRUE(isa<Instruction>(F)); 162 FAdd = cast<Instruction>(F); 163 EXPECT_TRUE(FAdd->hasNoNaNs()); 164 165 F = Builder.CreateFDiv(F, F); 166 EXPECT_TRUE(Builder.getFastMathFlags().any()); 167 EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra); 168 ASSERT_TRUE(isa<Instruction>(F)); 169 FDiv = cast<Instruction>(F); 170 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 171 172 Builder.clearFastMathFlags(); 173 174 F = Builder.CreateFDiv(F, F); 175 ASSERT_TRUE(isa<Instruction>(F)); 176 FDiv = cast<Instruction>(F); 177 EXPECT_FALSE(FDiv->hasAllowReciprocal()); 178 179 FMF.clear(); 180 FMF.setAllowReciprocal(); 181 Builder.SetFastMathFlags(FMF); 182 183 F = Builder.CreateFDiv(F, F); 184 EXPECT_TRUE(Builder.getFastMathFlags().any()); 185 EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal); 186 ASSERT_TRUE(isa<Instruction>(F)); 187 FDiv = cast<Instruction>(F); 188 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 189 190 Builder.clearFastMathFlags(); 191 192 F = Builder.CreateFDiv(F, F); 193 ASSERT_TRUE(isa<Instruction>(F)); 194 FDiv = cast<Instruction>(F); 195 EXPECT_FALSE(FDiv->getFastMathFlags().any()); 196 FDiv->copyFastMathFlags(FAdd); 197 EXPECT_TRUE(FDiv->hasNoNaNs()); 198 199 } 200 201 TEST_F(IRBuilderTest, WrapFlags) { 202 IRBuilder<true, NoFolder> Builder(BB); 203 204 // Test instructions. 205 GlobalVariable *G = new GlobalVariable(*M, Builder.getInt32Ty(), true, 206 GlobalValue::ExternalLinkage, nullptr); 207 Value *V = Builder.CreateLoad(G); 208 EXPECT_TRUE( 209 cast<BinaryOperator>(Builder.CreateNSWAdd(V, V))->hasNoSignedWrap()); 210 EXPECT_TRUE( 211 cast<BinaryOperator>(Builder.CreateNSWMul(V, V))->hasNoSignedWrap()); 212 EXPECT_TRUE( 213 cast<BinaryOperator>(Builder.CreateNSWSub(V, V))->hasNoSignedWrap()); 214 EXPECT_TRUE(cast<BinaryOperator>( 215 Builder.CreateShl(V, V, "", /* NUW */ false, /* NSW */ true)) 216 ->hasNoSignedWrap()); 217 218 EXPECT_TRUE( 219 cast<BinaryOperator>(Builder.CreateNUWAdd(V, V))->hasNoUnsignedWrap()); 220 EXPECT_TRUE( 221 cast<BinaryOperator>(Builder.CreateNUWMul(V, V))->hasNoUnsignedWrap()); 222 EXPECT_TRUE( 223 cast<BinaryOperator>(Builder.CreateNUWSub(V, V))->hasNoUnsignedWrap()); 224 EXPECT_TRUE(cast<BinaryOperator>( 225 Builder.CreateShl(V, V, "", /* NUW */ true, /* NSW */ false)) 226 ->hasNoUnsignedWrap()); 227 228 // Test operators created with constants. 229 Constant *C = Builder.getInt32(42); 230 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWAdd(C, C)) 231 ->hasNoSignedWrap()); 232 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWSub(C, C)) 233 ->hasNoSignedWrap()); 234 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWMul(C, C)) 235 ->hasNoSignedWrap()); 236 EXPECT_TRUE(cast<OverflowingBinaryOperator>( 237 Builder.CreateShl(C, C, "", /* NUW */ false, /* NSW */ true)) 238 ->hasNoSignedWrap()); 239 240 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWAdd(C, C)) 241 ->hasNoUnsignedWrap()); 242 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWSub(C, C)) 243 ->hasNoUnsignedWrap()); 244 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWMul(C, C)) 245 ->hasNoUnsignedWrap()); 246 EXPECT_TRUE(cast<OverflowingBinaryOperator>( 247 Builder.CreateShl(C, C, "", /* NUW */ true, /* NSW */ false)) 248 ->hasNoUnsignedWrap()); 249 } 250 251 TEST_F(IRBuilderTest, RAIIHelpersTest) { 252 IRBuilder<> Builder(BB); 253 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 254 MDBuilder MDB(M->getContext()); 255 256 MDNode *FPMathA = MDB.createFPMath(0.01f); 257 MDNode *FPMathB = MDB.createFPMath(0.1f); 258 259 Builder.SetDefaultFPMathTag(FPMathA); 260 261 { 262 IRBuilder<>::FastMathFlagGuard Guard(Builder); 263 FastMathFlags FMF; 264 FMF.setAllowReciprocal(); 265 Builder.SetFastMathFlags(FMF); 266 Builder.SetDefaultFPMathTag(FPMathB); 267 EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal()); 268 EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag()); 269 } 270 271 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 272 EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag()); 273 274 Value *F = Builder.CreateLoad(GV); 275 276 { 277 IRBuilder<>::InsertPointGuard Guard(Builder); 278 Builder.SetInsertPoint(cast<Instruction>(F)); 279 EXPECT_EQ(F, Builder.GetInsertPoint()); 280 } 281 282 EXPECT_EQ(BB->end(), Builder.GetInsertPoint()); 283 EXPECT_EQ(BB, Builder.GetInsertBlock()); 284 } 285 286 287 } 288
