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 "llvm/Support/NoFolder.h" 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", Ctx)); 30 FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx), 31 /*isVarArg=*/false); 32 F = Function::Create(FTy, Function::ExternalLinkage, "", M.get()); 33 BB = BasicBlock::Create(Ctx, "", F); 34 GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true, 35 GlobalValue::ExternalLinkage, 0); 36 } 37 38 virtual void TearDown() { 39 BB = 0; 40 M.reset(); 41 } 42 43 LLVMContext Ctx; 44 OwningPtr<Module> M; 45 Function *F; 46 BasicBlock *BB; 47 GlobalVariable *GV; 48 }; 49 50 TEST_F(IRBuilderTest, Lifetime) { 51 IRBuilder<> Builder(BB); 52 AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty()); 53 AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty()); 54 AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(), 55 Builder.getInt32(123)); 56 57 CallInst *Start1 = Builder.CreateLifetimeStart(Var1); 58 CallInst *Start2 = Builder.CreateLifetimeStart(Var2); 59 CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100)); 60 61 EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1)); 62 EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1)); 63 EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100)); 64 65 EXPECT_EQ(Start1->getArgOperand(1), Var1); 66 EXPECT_NE(Start2->getArgOperand(1), Var2); 67 EXPECT_EQ(Start3->getArgOperand(1), Var3); 68 69 Value *End1 = Builder.CreateLifetimeEnd(Var1); 70 Builder.CreateLifetimeEnd(Var2); 71 Builder.CreateLifetimeEnd(Var3); 72 73 IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1); 74 IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1); 75 ASSERT_TRUE(II_Start1 != NULL); 76 EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start); 77 ASSERT_TRUE(II_End1 != NULL); 78 EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end); 79 } 80 81 TEST_F(IRBuilderTest, CreateCondBr) { 82 IRBuilder<> Builder(BB); 83 BasicBlock *TBB = BasicBlock::Create(Ctx, "", F); 84 BasicBlock *FBB = BasicBlock::Create(Ctx, "", F); 85 86 BranchInst *BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB); 87 TerminatorInst *TI = BB->getTerminator(); 88 EXPECT_EQ(BI, TI); 89 EXPECT_EQ(2u, TI->getNumSuccessors()); 90 EXPECT_EQ(TBB, TI->getSuccessor(0)); 91 EXPECT_EQ(FBB, TI->getSuccessor(1)); 92 93 BI->eraseFromParent(); 94 MDNode *Weights = MDBuilder(Ctx).createBranchWeights(42, 13); 95 BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB, Weights); 96 TI = BB->getTerminator(); 97 EXPECT_EQ(BI, TI); 98 EXPECT_EQ(2u, TI->getNumSuccessors()); 99 EXPECT_EQ(TBB, TI->getSuccessor(0)); 100 EXPECT_EQ(FBB, TI->getSuccessor(1)); 101 EXPECT_EQ(Weights, TI->getMetadata(LLVMContext::MD_prof)); 102 } 103 104 TEST_F(IRBuilderTest, LandingPadName) { 105 IRBuilder<> Builder(BB); 106 LandingPadInst *LP = Builder.CreateLandingPad(Builder.getInt32Ty(), 107 Builder.getInt32(0), 0, "LP"); 108 EXPECT_EQ(LP->getName(), "LP"); 109 } 110 111 TEST_F(IRBuilderTest, DataLayout) { 112 OwningPtr<Module> M(new Module("test", Ctx)); 113 M->setDataLayout("e-n32"); 114 EXPECT_TRUE(M->getDataLayout()->isLegalInteger(32)); 115 M->setDataLayout("e"); 116 EXPECT_FALSE(M->getDataLayout()->isLegalInteger(32)); 117 } 118 119 TEST_F(IRBuilderTest, GetIntTy) { 120 IRBuilder<> Builder(BB); 121 IntegerType *Ty1 = Builder.getInt1Ty(); 122 EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1)); 123 124 DataLayout* DL = new DataLayout(M.get()); 125 IntegerType *IntPtrTy = Builder.getIntPtrTy(DL); 126 unsigned IntPtrBitSize = DL->getPointerSizeInBits(0); 127 EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize)); 128 delete DL; 129 } 130 131 TEST_F(IRBuilderTest, FastMathFlags) { 132 IRBuilder<> Builder(BB); 133 Value *F; 134 Instruction *FDiv, *FAdd; 135 136 F = Builder.CreateLoad(GV); 137 F = Builder.CreateFAdd(F, F); 138 139 EXPECT_FALSE(Builder.getFastMathFlags().any()); 140 ASSERT_TRUE(isa<Instruction>(F)); 141 FAdd = cast<Instruction>(F); 142 EXPECT_FALSE(FAdd->hasNoNaNs()); 143 144 FastMathFlags FMF; 145 Builder.SetFastMathFlags(FMF); 146 147 F = Builder.CreateFAdd(F, F); 148 EXPECT_FALSE(Builder.getFastMathFlags().any()); 149 150 FMF.setUnsafeAlgebra(); 151 Builder.SetFastMathFlags(FMF); 152 153 F = Builder.CreateFAdd(F, F); 154 EXPECT_TRUE(Builder.getFastMathFlags().any()); 155 ASSERT_TRUE(isa<Instruction>(F)); 156 FAdd = cast<Instruction>(F); 157 EXPECT_TRUE(FAdd->hasNoNaNs()); 158 159 // Now, try it with CreateBinOp 160 F = Builder.CreateBinOp(Instruction::FAdd, F, F); 161 EXPECT_TRUE(Builder.getFastMathFlags().any()); 162 ASSERT_TRUE(isa<Instruction>(F)); 163 FAdd = cast<Instruction>(F); 164 EXPECT_TRUE(FAdd->hasNoNaNs()); 165 166 F = Builder.CreateFDiv(F, F); 167 EXPECT_TRUE(Builder.getFastMathFlags().any()); 168 EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra); 169 ASSERT_TRUE(isa<Instruction>(F)); 170 FDiv = cast<Instruction>(F); 171 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 172 173 Builder.clearFastMathFlags(); 174 175 F = Builder.CreateFDiv(F, F); 176 ASSERT_TRUE(isa<Instruction>(F)); 177 FDiv = cast<Instruction>(F); 178 EXPECT_FALSE(FDiv->hasAllowReciprocal()); 179 180 FMF.clear(); 181 FMF.setAllowReciprocal(); 182 Builder.SetFastMathFlags(FMF); 183 184 F = Builder.CreateFDiv(F, F); 185 EXPECT_TRUE(Builder.getFastMathFlags().any()); 186 EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal); 187 ASSERT_TRUE(isa<Instruction>(F)); 188 FDiv = cast<Instruction>(F); 189 EXPECT_TRUE(FDiv->hasAllowReciprocal()); 190 191 Builder.clearFastMathFlags(); 192 193 F = Builder.CreateFDiv(F, F); 194 ASSERT_TRUE(isa<Instruction>(F)); 195 FDiv = cast<Instruction>(F); 196 EXPECT_FALSE(FDiv->getFastMathFlags().any()); 197 FDiv->copyFastMathFlags(FAdd); 198 EXPECT_TRUE(FDiv->hasNoNaNs()); 199 200 } 201 202 TEST_F(IRBuilderTest, WrapFlags) { 203 IRBuilder<true, NoFolder> Builder(BB); 204 205 // Test instructions. 206 GlobalVariable *G = new GlobalVariable(*M, Builder.getInt32Ty(), true, 207 GlobalValue::ExternalLinkage, 0); 208 Value *V = Builder.CreateLoad(G); 209 EXPECT_TRUE( 210 cast<BinaryOperator>(Builder.CreateNSWAdd(V, V))->hasNoSignedWrap()); 211 EXPECT_TRUE( 212 cast<BinaryOperator>(Builder.CreateNSWMul(V, V))->hasNoSignedWrap()); 213 EXPECT_TRUE( 214 cast<BinaryOperator>(Builder.CreateNSWSub(V, V))->hasNoSignedWrap()); 215 EXPECT_TRUE(cast<BinaryOperator>( 216 Builder.CreateShl(V, V, "", /* NUW */ false, /* NSW */ true)) 217 ->hasNoSignedWrap()); 218 219 EXPECT_TRUE( 220 cast<BinaryOperator>(Builder.CreateNUWAdd(V, V))->hasNoUnsignedWrap()); 221 EXPECT_TRUE( 222 cast<BinaryOperator>(Builder.CreateNUWMul(V, V))->hasNoUnsignedWrap()); 223 EXPECT_TRUE( 224 cast<BinaryOperator>(Builder.CreateNUWSub(V, V))->hasNoUnsignedWrap()); 225 EXPECT_TRUE(cast<BinaryOperator>( 226 Builder.CreateShl(V, V, "", /* NUW */ true, /* NSW */ false)) 227 ->hasNoUnsignedWrap()); 228 229 // Test operators created with constants. 230 Constant *C = Builder.getInt32(42); 231 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWAdd(C, C)) 232 ->hasNoSignedWrap()); 233 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWSub(C, C)) 234 ->hasNoSignedWrap()); 235 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWMul(C, C)) 236 ->hasNoSignedWrap()); 237 EXPECT_TRUE(cast<OverflowingBinaryOperator>( 238 Builder.CreateShl(C, C, "", /* NUW */ false, /* NSW */ true)) 239 ->hasNoSignedWrap()); 240 241 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWAdd(C, C)) 242 ->hasNoUnsignedWrap()); 243 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWSub(C, C)) 244 ->hasNoUnsignedWrap()); 245 EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWMul(C, C)) 246 ->hasNoUnsignedWrap()); 247 EXPECT_TRUE(cast<OverflowingBinaryOperator>( 248 Builder.CreateShl(C, C, "", /* NUW */ true, /* NSW */ false)) 249 ->hasNoUnsignedWrap()); 250 } 251 252 TEST_F(IRBuilderTest, RAIIHelpersTest) { 253 IRBuilder<> Builder(BB); 254 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 255 MDBuilder MDB(M->getContext()); 256 257 MDNode *FPMathA = MDB.createFPMath(0.01f); 258 MDNode *FPMathB = MDB.createFPMath(0.1f); 259 260 Builder.SetDefaultFPMathTag(FPMathA); 261 262 { 263 IRBuilder<>::FastMathFlagGuard Guard(Builder); 264 FastMathFlags FMF; 265 FMF.setAllowReciprocal(); 266 Builder.SetFastMathFlags(FMF); 267 Builder.SetDefaultFPMathTag(FPMathB); 268 EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal()); 269 EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag()); 270 } 271 272 EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal()); 273 EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag()); 274 275 Value *F = Builder.CreateLoad(GV); 276 277 { 278 IRBuilder<>::InsertPointGuard Guard(Builder); 279 Builder.SetInsertPoint(cast<Instruction>(F)); 280 EXPECT_EQ(F, Builder.GetInsertPoint()); 281 } 282 283 EXPECT_EQ(BB->end(), Builder.GetInsertPoint()); 284 EXPECT_EQ(BB, Builder.GetInsertBlock()); 285 } 286 287 288 } 289