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llvm-project/llvm/unittests/IR/IRBuilderTest.cpp

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//===- llvm/unittest/IR/IRBuilderTest.cpp - IRBuilder tests ---------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/NoFolder.h"
#include "llvm/IR/Verifier.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
class IRBuilderTest : public testing::Test {
protected:
void SetUp() override {
M.reset(new Module("MyModule", Ctx));
FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
/*isVarArg=*/false);
F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
BB = BasicBlock::Create(Ctx, "", F);
GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true,
GlobalValue::ExternalLinkage, nullptr);
}
void TearDown() override {
BB = nullptr;
M.reset();
}
LLVMContext Ctx;
std::unique_ptr<Module> M;
Function *F;
BasicBlock *BB;
GlobalVariable *GV;
};
TEST_F(IRBuilderTest, Lifetime) {
IRBuilder<> Builder(BB);
AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty());
AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty());
AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(),
Builder.getInt32(123));
CallInst *Start1 = Builder.CreateLifetimeStart(Var1);
CallInst *Start2 = Builder.CreateLifetimeStart(Var2);
CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100));
EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1));
EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1));
EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100));
EXPECT_EQ(Start1->getArgOperand(1), Var1);
EXPECT_NE(Start2->getArgOperand(1), Var2);
EXPECT_EQ(Start3->getArgOperand(1), Var3);
Value *End1 = Builder.CreateLifetimeEnd(Var1);
Builder.CreateLifetimeEnd(Var2);
Builder.CreateLifetimeEnd(Var3);
IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1);
IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1);
ASSERT_TRUE(II_Start1 != nullptr);
EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start);
ASSERT_TRUE(II_End1 != nullptr);
EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end);
}
TEST_F(IRBuilderTest, CreateCondBr) {
IRBuilder<> Builder(BB);
BasicBlock *TBB = BasicBlock::Create(Ctx, "", F);
BasicBlock *FBB = BasicBlock::Create(Ctx, "", F);
BranchInst *BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB);
TerminatorInst *TI = BB->getTerminator();
EXPECT_EQ(BI, TI);
EXPECT_EQ(2u, TI->getNumSuccessors());
EXPECT_EQ(TBB, TI->getSuccessor(0));
EXPECT_EQ(FBB, TI->getSuccessor(1));
BI->eraseFromParent();
MDNode *Weights = MDBuilder(Ctx).createBranchWeights(42, 13);
BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB, Weights);
TI = BB->getTerminator();
EXPECT_EQ(BI, TI);
EXPECT_EQ(2u, TI->getNumSuccessors());
EXPECT_EQ(TBB, TI->getSuccessor(0));
EXPECT_EQ(FBB, TI->getSuccessor(1));
EXPECT_EQ(Weights, TI->getMetadata(LLVMContext::MD_prof));
}
TEST_F(IRBuilderTest, LandingPadName) {
IRBuilder<> Builder(BB);
LandingPadInst *LP = Builder.CreateLandingPad(Builder.getInt32Ty(), 0, "LP");
EXPECT_EQ(LP->getName(), "LP");
}
TEST_F(IRBuilderTest, DataLayout) {
std::unique_ptr<Module> M(new Module("test", Ctx));
M->setDataLayout("e-n32");
EXPECT_TRUE(M->getDataLayout().isLegalInteger(32));
M->setDataLayout("e");
EXPECT_FALSE(M->getDataLayout().isLegalInteger(32));
}
TEST_F(IRBuilderTest, GetIntTy) {
IRBuilder<> Builder(BB);
IntegerType *Ty1 = Builder.getInt1Ty();
EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1));
DataLayout* DL = new DataLayout(M.get());
IntegerType *IntPtrTy = Builder.getIntPtrTy(*DL);
unsigned IntPtrBitSize = DL->getPointerSizeInBits(0);
EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize));
delete DL;
}
TEST_F(IRBuilderTest, FastMathFlags) {
IRBuilder<> Builder(BB);
Value *F, *FC;
Instruction *FDiv, *FAdd, *FCmp;
F = Builder.CreateLoad(GV);
F = Builder.CreateFAdd(F, F);
EXPECT_FALSE(Builder.getFastMathFlags().any());
ASSERT_TRUE(isa<Instruction>(F));
FAdd = cast<Instruction>(F);
EXPECT_FALSE(FAdd->hasNoNaNs());
FastMathFlags FMF;
Builder.SetFastMathFlags(FMF);
F = Builder.CreateFAdd(F, F);
EXPECT_FALSE(Builder.getFastMathFlags().any());
FMF.setUnsafeAlgebra();
Builder.SetFastMathFlags(FMF);
F = Builder.CreateFAdd(F, F);
EXPECT_TRUE(Builder.getFastMathFlags().any());
ASSERT_TRUE(isa<Instruction>(F));
FAdd = cast<Instruction>(F);
EXPECT_TRUE(FAdd->hasNoNaNs());
// Now, try it with CreateBinOp
F = Builder.CreateBinOp(Instruction::FAdd, F, F);
EXPECT_TRUE(Builder.getFastMathFlags().any());
ASSERT_TRUE(isa<Instruction>(F));
FAdd = cast<Instruction>(F);
EXPECT_TRUE(FAdd->hasNoNaNs());
F = Builder.CreateFDiv(F, F);
EXPECT_TRUE(Builder.getFastMathFlags().any());
EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra);
ASSERT_TRUE(isa<Instruction>(F));
FDiv = cast<Instruction>(F);
EXPECT_TRUE(FDiv->hasAllowReciprocal());
Builder.clearFastMathFlags();
F = Builder.CreateFDiv(F, F);
ASSERT_TRUE(isa<Instruction>(F));
FDiv = cast<Instruction>(F);
EXPECT_FALSE(FDiv->hasAllowReciprocal());
FMF.clear();
FMF.setAllowReciprocal();
Builder.SetFastMathFlags(FMF);
F = Builder.CreateFDiv(F, F);
EXPECT_TRUE(Builder.getFastMathFlags().any());
EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
ASSERT_TRUE(isa<Instruction>(F));
FDiv = cast<Instruction>(F);
EXPECT_TRUE(FDiv->hasAllowReciprocal());
Builder.clearFastMathFlags();
FC = Builder.CreateFCmpOEQ(F, F);
ASSERT_TRUE(isa<Instruction>(FC));
FCmp = cast<Instruction>(FC);
EXPECT_FALSE(FCmp->hasAllowReciprocal());
FMF.clear();
FMF.setAllowReciprocal();
Builder.SetFastMathFlags(FMF);
FC = Builder.CreateFCmpOEQ(F, F);
EXPECT_TRUE(Builder.getFastMathFlags().any());
EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
ASSERT_TRUE(isa<Instruction>(FC));
FCmp = cast<Instruction>(FC);
EXPECT_TRUE(FCmp->hasAllowReciprocal());
Builder.clearFastMathFlags();
// To test a copy, make sure that a '0' and a '1' change state.
F = Builder.CreateFDiv(F, F);
ASSERT_TRUE(isa<Instruction>(F));
FDiv = cast<Instruction>(F);
EXPECT_FALSE(FDiv->getFastMathFlags().any());
FDiv->setHasAllowReciprocal(true);
FAdd->setHasAllowReciprocal(false);
FDiv->copyFastMathFlags(FAdd);
EXPECT_TRUE(FDiv->hasNoNaNs());
EXPECT_FALSE(FDiv->hasAllowReciprocal());
}
TEST_F(IRBuilderTest, WrapFlags) {
IRBuilder<true, NoFolder> Builder(BB);
// Test instructions.
GlobalVariable *G = new GlobalVariable(*M, Builder.getInt32Ty(), true,
GlobalValue::ExternalLinkage, nullptr);
Value *V = Builder.CreateLoad(G);
EXPECT_TRUE(
cast<BinaryOperator>(Builder.CreateNSWAdd(V, V))->hasNoSignedWrap());
EXPECT_TRUE(
cast<BinaryOperator>(Builder.CreateNSWMul(V, V))->hasNoSignedWrap());
EXPECT_TRUE(
cast<BinaryOperator>(Builder.CreateNSWSub(V, V))->hasNoSignedWrap());
EXPECT_TRUE(cast<BinaryOperator>(
Builder.CreateShl(V, V, "", /* NUW */ false, /* NSW */ true))
->hasNoSignedWrap());
EXPECT_TRUE(
cast<BinaryOperator>(Builder.CreateNUWAdd(V, V))->hasNoUnsignedWrap());
EXPECT_TRUE(
cast<BinaryOperator>(Builder.CreateNUWMul(V, V))->hasNoUnsignedWrap());
EXPECT_TRUE(
cast<BinaryOperator>(Builder.CreateNUWSub(V, V))->hasNoUnsignedWrap());
EXPECT_TRUE(cast<BinaryOperator>(
Builder.CreateShl(V, V, "", /* NUW */ true, /* NSW */ false))
->hasNoUnsignedWrap());
// Test operators created with constants.
Constant *C = Builder.getInt32(42);
EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWAdd(C, C))
->hasNoSignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWSub(C, C))
->hasNoSignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWMul(C, C))
->hasNoSignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(
Builder.CreateShl(C, C, "", /* NUW */ false, /* NSW */ true))
->hasNoSignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWAdd(C, C))
->hasNoUnsignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWSub(C, C))
->hasNoUnsignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWMul(C, C))
->hasNoUnsignedWrap());
EXPECT_TRUE(cast<OverflowingBinaryOperator>(
Builder.CreateShl(C, C, "", /* NUW */ true, /* NSW */ false))
->hasNoUnsignedWrap());
}
TEST_F(IRBuilderTest, RAIIHelpersTest) {
IRBuilder<> Builder(BB);
EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal());
MDBuilder MDB(M->getContext());
MDNode *FPMathA = MDB.createFPMath(0.01f);
MDNode *FPMathB = MDB.createFPMath(0.1f);
Builder.SetDefaultFPMathTag(FPMathA);
{
IRBuilder<>::FastMathFlagGuard Guard(Builder);
FastMathFlags FMF;
FMF.setAllowReciprocal();
Builder.SetFastMathFlags(FMF);
Builder.SetDefaultFPMathTag(FPMathB);
EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal());
EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag());
}
EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal());
EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag());
Value *F = Builder.CreateLoad(GV);
{
IRBuilder<>::InsertPointGuard Guard(Builder);
Builder.SetInsertPoint(cast<Instruction>(F));
EXPECT_EQ(F, &*Builder.GetInsertPoint());
}
EXPECT_EQ(BB->end(), Builder.GetInsertPoint());
EXPECT_EQ(BB, Builder.GetInsertBlock());
}
TEST_F(IRBuilderTest, DIBuilder) {
IRBuilder<> Builder(BB);
DIBuilder DIB(*M);
auto File = DIB.createFile("F.CBL", "/");
auto CU = DIB.createCompileUnit(dwarf::DW_LANG_Cobol74, "F.CBL", "/",
"llvm-cobol74", true, "", 0);
auto Type = DIB.createSubroutineType(DIB.getOrCreateTypeArray(None));
auto SP =
DIB.createFunction(CU, "foo", "", File, 1, Type, false, true, 1, 0, true);
F->setSubprogram(SP);
AllocaInst *I = Builder.CreateAlloca(Builder.getInt8Ty());
auto BarSP =
DIB.createFunction(CU, "bar", "", File, 1, Type, false, true, 1, 0, true);
auto BadScope = DIB.createLexicalBlockFile(BarSP, File, 0);
I->setDebugLoc(DebugLoc::get(2, 0, BadScope));
DIB.finalize();
EXPECT_TRUE(verifyModule(*M));
}
TEST_F(IRBuilderTest, InsertExtractElement) {
IRBuilder<> Builder(BB);
auto VecTy = VectorType::get(Builder.getInt64Ty(), 4);
auto Elt1 = Builder.getInt64(-1);
auto Elt2 = Builder.getInt64(-2);
Value *Vec = UndefValue::get(VecTy);
Vec = Builder.CreateInsertElement(Vec, Elt1, Builder.getInt8(1));
Vec = Builder.CreateInsertElement(Vec, Elt2, 2);
auto X1 = Builder.CreateExtractElement(Vec, 1);
auto X2 = Builder.CreateExtractElement(Vec, Builder.getInt32(2));
EXPECT_EQ(Elt1, X1);
EXPECT_EQ(Elt2, X2);
}
TEST_F(IRBuilderTest, CreateGlobalStringPtr) {
IRBuilder<> Builder(BB);
auto String1a = Builder.CreateGlobalStringPtr("TestString", "String1a");
auto String1b = Builder.CreateGlobalStringPtr("TestString", "String1b", 0);
auto String2 = Builder.CreateGlobalStringPtr("TestString", "String2", 1);
auto String3 = Builder.CreateGlobalString("TestString", "String3", 2);
EXPECT_TRUE(String1a->getType()->getPointerAddressSpace() == 0);
EXPECT_TRUE(String1b->getType()->getPointerAddressSpace() == 0);
EXPECT_TRUE(String2->getType()->getPointerAddressSpace() == 1);
EXPECT_TRUE(String3->getType()->getPointerAddressSpace() == 2);
}
TEST_F(IRBuilderTest, DebugLoc) {
auto CalleeTy = FunctionType::get(Type::getVoidTy(Ctx),
/*isVarArg=*/false);
auto Callee =
Function::Create(CalleeTy, Function::ExternalLinkage, "", M.get());
DIBuilder DIB(*M);
auto File = DIB.createFile("tmp.cpp", "/");
auto CU = DIB.createCompileUnit(dwarf::DW_LANG_C_plus_plus_11, "tmp.cpp", "/",
"", true, "", 0);
auto SPType = DIB.createSubroutineType(DIB.getOrCreateTypeArray(None));
auto SP =
DIB.createFunction(CU, "foo", "foo", File, 1, SPType, false, true, 1);
DebugLoc DL1 = DILocation::get(Ctx, 2, 0, SP);
DebugLoc DL2 = DILocation::get(Ctx, 3, 0, SP);
auto BB2 = BasicBlock::Create(Ctx, "bb2", F);
auto Br = BranchInst::Create(BB2, BB);
Br->setDebugLoc(DL1);
IRBuilder<> Builder(Ctx);
Builder.SetInsertPoint(Br);
EXPECT_EQ(DL1, Builder.getCurrentDebugLocation());
auto Call1 = Builder.CreateCall(Callee, None);
EXPECT_EQ(DL1, Call1->getDebugLoc());
Call1->setDebugLoc(DL2);
Builder.SetInsertPoint(Call1->getParent(), Call1->getIterator());
EXPECT_EQ(DL2, Builder.getCurrentDebugLocation());
auto Call2 = Builder.CreateCall(Callee, None);
EXPECT_EQ(DL2, Call2->getDebugLoc());
DIB.finalize();
}
}
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