mirror of
https://github.com/c64scene-ar/llvm-6502.git
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ee0d992b07
FCmp behaves a lot like a floating-point binary operator in many ways, and can benefit from fast-math information. Flags such as nsz and nnan can affect if this fcmp (in combination with a select) can be treated as a fminnum/fmaxnum operation. This adds backwards-compatible bitcode support, IR parsing and writing, LangRef changes and IRBuilder changes. I'll need to audit InstSimplify and InstCombine in a followup to find places where flags should be copied. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241901 91177308-0d34-0410-b5e6-96231b3b80d8
390 lines
13 KiB
C++
390 lines
13 KiB
C++
//===- llvm/unittest/IR/IRBuilderTest.cpp - IRBuilder tests ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/MDBuilder.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/NoFolder.h"
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#include "llvm/IR/Verifier.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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class IRBuilderTest : public testing::Test {
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protected:
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void SetUp() override {
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M.reset(new Module("MyModule", Ctx));
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FunctionType *FTy = FunctionType::get(Type::getVoidTy(Ctx),
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/*isVarArg=*/false);
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F = Function::Create(FTy, Function::ExternalLinkage, "", M.get());
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BB = BasicBlock::Create(Ctx, "", F);
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GV = new GlobalVariable(*M, Type::getFloatTy(Ctx), true,
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GlobalValue::ExternalLinkage, nullptr);
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}
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void TearDown() override {
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BB = nullptr;
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M.reset();
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}
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LLVMContext Ctx;
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std::unique_ptr<Module> M;
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Function *F;
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BasicBlock *BB;
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GlobalVariable *GV;
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};
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TEST_F(IRBuilderTest, Lifetime) {
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IRBuilder<> Builder(BB);
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AllocaInst *Var1 = Builder.CreateAlloca(Builder.getInt8Ty());
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AllocaInst *Var2 = Builder.CreateAlloca(Builder.getInt32Ty());
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AllocaInst *Var3 = Builder.CreateAlloca(Builder.getInt8Ty(),
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Builder.getInt32(123));
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CallInst *Start1 = Builder.CreateLifetimeStart(Var1);
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CallInst *Start2 = Builder.CreateLifetimeStart(Var2);
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CallInst *Start3 = Builder.CreateLifetimeStart(Var3, Builder.getInt64(100));
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EXPECT_EQ(Start1->getArgOperand(0), Builder.getInt64(-1));
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EXPECT_EQ(Start2->getArgOperand(0), Builder.getInt64(-1));
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EXPECT_EQ(Start3->getArgOperand(0), Builder.getInt64(100));
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EXPECT_EQ(Start1->getArgOperand(1), Var1);
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EXPECT_NE(Start2->getArgOperand(1), Var2);
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EXPECT_EQ(Start3->getArgOperand(1), Var3);
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Value *End1 = Builder.CreateLifetimeEnd(Var1);
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Builder.CreateLifetimeEnd(Var2);
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Builder.CreateLifetimeEnd(Var3);
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IntrinsicInst *II_Start1 = dyn_cast<IntrinsicInst>(Start1);
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IntrinsicInst *II_End1 = dyn_cast<IntrinsicInst>(End1);
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ASSERT_TRUE(II_Start1 != nullptr);
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EXPECT_EQ(II_Start1->getIntrinsicID(), Intrinsic::lifetime_start);
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ASSERT_TRUE(II_End1 != nullptr);
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EXPECT_EQ(II_End1->getIntrinsicID(), Intrinsic::lifetime_end);
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}
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TEST_F(IRBuilderTest, CreateCondBr) {
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IRBuilder<> Builder(BB);
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BasicBlock *TBB = BasicBlock::Create(Ctx, "", F);
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BasicBlock *FBB = BasicBlock::Create(Ctx, "", F);
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BranchInst *BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB);
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TerminatorInst *TI = BB->getTerminator();
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EXPECT_EQ(BI, TI);
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EXPECT_EQ(2u, TI->getNumSuccessors());
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EXPECT_EQ(TBB, TI->getSuccessor(0));
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EXPECT_EQ(FBB, TI->getSuccessor(1));
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BI->eraseFromParent();
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MDNode *Weights = MDBuilder(Ctx).createBranchWeights(42, 13);
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BI = Builder.CreateCondBr(Builder.getTrue(), TBB, FBB, Weights);
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TI = BB->getTerminator();
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EXPECT_EQ(BI, TI);
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EXPECT_EQ(2u, TI->getNumSuccessors());
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EXPECT_EQ(TBB, TI->getSuccessor(0));
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EXPECT_EQ(FBB, TI->getSuccessor(1));
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EXPECT_EQ(Weights, TI->getMetadata(LLVMContext::MD_prof));
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}
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TEST_F(IRBuilderTest, LandingPadName) {
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IRBuilder<> Builder(BB);
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LandingPadInst *LP = Builder.CreateLandingPad(Builder.getInt32Ty(), 0, "LP");
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EXPECT_EQ(LP->getName(), "LP");
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}
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TEST_F(IRBuilderTest, DataLayout) {
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std::unique_ptr<Module> M(new Module("test", Ctx));
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M->setDataLayout("e-n32");
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EXPECT_TRUE(M->getDataLayout().isLegalInteger(32));
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M->setDataLayout("e");
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EXPECT_FALSE(M->getDataLayout().isLegalInteger(32));
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}
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TEST_F(IRBuilderTest, GetIntTy) {
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IRBuilder<> Builder(BB);
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IntegerType *Ty1 = Builder.getInt1Ty();
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EXPECT_EQ(Ty1, IntegerType::get(Ctx, 1));
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DataLayout* DL = new DataLayout(M.get());
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IntegerType *IntPtrTy = Builder.getIntPtrTy(*DL);
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unsigned IntPtrBitSize = DL->getPointerSizeInBits(0);
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EXPECT_EQ(IntPtrTy, IntegerType::get(Ctx, IntPtrBitSize));
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delete DL;
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}
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TEST_F(IRBuilderTest, FastMathFlags) {
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IRBuilder<> Builder(BB);
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Value *F, *FC;
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Instruction *FDiv, *FAdd, *FCmp;
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F = Builder.CreateLoad(GV);
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F = Builder.CreateFAdd(F, F);
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EXPECT_FALSE(Builder.getFastMathFlags().any());
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ASSERT_TRUE(isa<Instruction>(F));
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FAdd = cast<Instruction>(F);
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EXPECT_FALSE(FAdd->hasNoNaNs());
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FastMathFlags FMF;
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Builder.SetFastMathFlags(FMF);
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F = Builder.CreateFAdd(F, F);
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EXPECT_FALSE(Builder.getFastMathFlags().any());
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FMF.setUnsafeAlgebra();
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Builder.SetFastMathFlags(FMF);
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F = Builder.CreateFAdd(F, F);
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EXPECT_TRUE(Builder.getFastMathFlags().any());
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ASSERT_TRUE(isa<Instruction>(F));
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FAdd = cast<Instruction>(F);
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EXPECT_TRUE(FAdd->hasNoNaNs());
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// Now, try it with CreateBinOp
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F = Builder.CreateBinOp(Instruction::FAdd, F, F);
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EXPECT_TRUE(Builder.getFastMathFlags().any());
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ASSERT_TRUE(isa<Instruction>(F));
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FAdd = cast<Instruction>(F);
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EXPECT_TRUE(FAdd->hasNoNaNs());
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F = Builder.CreateFDiv(F, F);
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EXPECT_TRUE(Builder.getFastMathFlags().any());
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EXPECT_TRUE(Builder.getFastMathFlags().UnsafeAlgebra);
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ASSERT_TRUE(isa<Instruction>(F));
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FDiv = cast<Instruction>(F);
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EXPECT_TRUE(FDiv->hasAllowReciprocal());
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Builder.clearFastMathFlags();
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F = Builder.CreateFDiv(F, F);
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ASSERT_TRUE(isa<Instruction>(F));
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FDiv = cast<Instruction>(F);
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EXPECT_FALSE(FDiv->hasAllowReciprocal());
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FMF.clear();
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FMF.setAllowReciprocal();
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Builder.SetFastMathFlags(FMF);
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F = Builder.CreateFDiv(F, F);
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EXPECT_TRUE(Builder.getFastMathFlags().any());
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EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
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ASSERT_TRUE(isa<Instruction>(F));
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FDiv = cast<Instruction>(F);
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EXPECT_TRUE(FDiv->hasAllowReciprocal());
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Builder.clearFastMathFlags();
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FC = Builder.CreateFCmpOEQ(F, F);
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ASSERT_TRUE(isa<Instruction>(FC));
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FCmp = cast<Instruction>(FC);
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EXPECT_FALSE(FCmp->hasAllowReciprocal());
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FMF.clear();
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FMF.setAllowReciprocal();
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Builder.SetFastMathFlags(FMF);
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FC = Builder.CreateFCmpOEQ(F, F);
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EXPECT_TRUE(Builder.getFastMathFlags().any());
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EXPECT_TRUE(Builder.getFastMathFlags().AllowReciprocal);
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ASSERT_TRUE(isa<Instruction>(FC));
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FCmp = cast<Instruction>(FC);
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EXPECT_TRUE(FCmp->hasAllowReciprocal());
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Builder.clearFastMathFlags();
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// To test a copy, make sure that a '0' and a '1' change state.
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F = Builder.CreateFDiv(F, F);
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ASSERT_TRUE(isa<Instruction>(F));
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FDiv = cast<Instruction>(F);
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EXPECT_FALSE(FDiv->getFastMathFlags().any());
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FDiv->setHasAllowReciprocal(true);
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FAdd->setHasAllowReciprocal(false);
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FDiv->copyFastMathFlags(FAdd);
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EXPECT_TRUE(FDiv->hasNoNaNs());
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EXPECT_FALSE(FDiv->hasAllowReciprocal());
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}
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TEST_F(IRBuilderTest, WrapFlags) {
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IRBuilder<true, NoFolder> Builder(BB);
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// Test instructions.
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GlobalVariable *G = new GlobalVariable(*M, Builder.getInt32Ty(), true,
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GlobalValue::ExternalLinkage, nullptr);
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Value *V = Builder.CreateLoad(G);
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EXPECT_TRUE(
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cast<BinaryOperator>(Builder.CreateNSWAdd(V, V))->hasNoSignedWrap());
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EXPECT_TRUE(
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cast<BinaryOperator>(Builder.CreateNSWMul(V, V))->hasNoSignedWrap());
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EXPECT_TRUE(
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cast<BinaryOperator>(Builder.CreateNSWSub(V, V))->hasNoSignedWrap());
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EXPECT_TRUE(cast<BinaryOperator>(
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Builder.CreateShl(V, V, "", /* NUW */ false, /* NSW */ true))
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->hasNoSignedWrap());
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EXPECT_TRUE(
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cast<BinaryOperator>(Builder.CreateNUWAdd(V, V))->hasNoUnsignedWrap());
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EXPECT_TRUE(
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cast<BinaryOperator>(Builder.CreateNUWMul(V, V))->hasNoUnsignedWrap());
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EXPECT_TRUE(
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cast<BinaryOperator>(Builder.CreateNUWSub(V, V))->hasNoUnsignedWrap());
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EXPECT_TRUE(cast<BinaryOperator>(
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Builder.CreateShl(V, V, "", /* NUW */ true, /* NSW */ false))
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->hasNoUnsignedWrap());
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// Test operators created with constants.
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Constant *C = Builder.getInt32(42);
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWAdd(C, C))
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->hasNoSignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWSub(C, C))
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->hasNoSignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNSWMul(C, C))
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->hasNoSignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(
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Builder.CreateShl(C, C, "", /* NUW */ false, /* NSW */ true))
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->hasNoSignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWAdd(C, C))
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->hasNoUnsignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWSub(C, C))
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->hasNoUnsignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(Builder.CreateNUWMul(C, C))
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->hasNoUnsignedWrap());
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EXPECT_TRUE(cast<OverflowingBinaryOperator>(
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Builder.CreateShl(C, C, "", /* NUW */ true, /* NSW */ false))
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->hasNoUnsignedWrap());
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}
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TEST_F(IRBuilderTest, RAIIHelpersTest) {
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IRBuilder<> Builder(BB);
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EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal());
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MDBuilder MDB(M->getContext());
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MDNode *FPMathA = MDB.createFPMath(0.01f);
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MDNode *FPMathB = MDB.createFPMath(0.1f);
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Builder.SetDefaultFPMathTag(FPMathA);
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{
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IRBuilder<>::FastMathFlagGuard Guard(Builder);
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FastMathFlags FMF;
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FMF.setAllowReciprocal();
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Builder.SetFastMathFlags(FMF);
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Builder.SetDefaultFPMathTag(FPMathB);
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EXPECT_TRUE(Builder.getFastMathFlags().allowReciprocal());
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EXPECT_EQ(FPMathB, Builder.getDefaultFPMathTag());
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}
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EXPECT_FALSE(Builder.getFastMathFlags().allowReciprocal());
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EXPECT_EQ(FPMathA, Builder.getDefaultFPMathTag());
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Value *F = Builder.CreateLoad(GV);
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{
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IRBuilder<>::InsertPointGuard Guard(Builder);
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Builder.SetInsertPoint(cast<Instruction>(F));
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EXPECT_EQ(F, Builder.GetInsertPoint());
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}
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EXPECT_EQ(BB->end(), Builder.GetInsertPoint());
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EXPECT_EQ(BB, Builder.GetInsertBlock());
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}
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TEST_F(IRBuilderTest, DIBuilder) {
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IRBuilder<> Builder(BB);
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DIBuilder DIB(*M);
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auto File = DIB.createFile("F.CBL", "/");
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auto CU = DIB.createCompileUnit(dwarf::DW_LANG_Cobol74, "F.CBL", "/",
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"llvm-cobol74", true, "", 0);
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auto Type = DIB.createSubroutineType(File, DIB.getOrCreateTypeArray(None));
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DIB.createFunction(CU, "foo", "", File, 1, Type, false, true, 1, 0, true, F);
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AllocaInst *I = Builder.CreateAlloca(Builder.getInt8Ty());
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auto BarSP = DIB.createFunction(CU, "bar", "", File, 1, Type, false, true, 1,
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0, true, nullptr);
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auto BadScope = DIB.createLexicalBlockFile(BarSP, File, 0);
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I->setDebugLoc(DebugLoc::get(2, 0, BadScope));
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DIB.finalize();
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EXPECT_TRUE(verifyModule(*M));
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}
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TEST_F(IRBuilderTest, InsertExtractElement) {
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IRBuilder<> Builder(BB);
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auto VecTy = VectorType::get(Builder.getInt64Ty(), 4);
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auto Elt1 = Builder.getInt64(-1);
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auto Elt2 = Builder.getInt64(-2);
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Value *Vec = UndefValue::get(VecTy);
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Vec = Builder.CreateInsertElement(Vec, Elt1, Builder.getInt8(1));
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Vec = Builder.CreateInsertElement(Vec, Elt2, 2);
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auto X1 = Builder.CreateExtractElement(Vec, 1);
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auto X2 = Builder.CreateExtractElement(Vec, Builder.getInt32(2));
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EXPECT_EQ(Elt1, X1);
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EXPECT_EQ(Elt2, X2);
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}
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TEST_F(IRBuilderTest, CreateGlobalStringPtr) {
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IRBuilder<> Builder(BB);
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auto String1a = Builder.CreateGlobalStringPtr("TestString", "String1a");
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auto String1b = Builder.CreateGlobalStringPtr("TestString", "String1b", 0);
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auto String2 = Builder.CreateGlobalStringPtr("TestString", "String2", 1);
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auto String3 = Builder.CreateGlobalString("TestString", "String3", 2);
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EXPECT_TRUE(String1a->getType()->getPointerAddressSpace() == 0);
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EXPECT_TRUE(String1b->getType()->getPointerAddressSpace() == 0);
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EXPECT_TRUE(String2->getType()->getPointerAddressSpace() == 1);
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EXPECT_TRUE(String3->getType()->getPointerAddressSpace() == 2);
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}
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TEST_F(IRBuilderTest, DebugLoc) {
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auto CalleeTy = FunctionType::get(Type::getVoidTy(Ctx),
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/*isVarArg=*/false);
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auto Callee =
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Function::Create(CalleeTy, Function::ExternalLinkage, "", M.get());
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DIBuilder DIB(*M);
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auto File = DIB.createFile("tmp.cpp", "/");
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auto CU = DIB.createCompileUnit(dwarf::DW_LANG_C_plus_plus_11, "tmp.cpp", "/",
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"", true, "", 0);
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auto SPType = DIB.createSubroutineType(File, DIB.getOrCreateTypeArray(None));
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auto SP =
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DIB.createFunction(CU, "foo", "foo", File, 1, SPType, false, true, 1);
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DebugLoc DL1 = DILocation::get(Ctx, 2, 0, SP);
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DebugLoc DL2 = DILocation::get(Ctx, 3, 0, SP);
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auto BB2 = BasicBlock::Create(Ctx, "bb2", F);
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auto Br = BranchInst::Create(BB2, BB);
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Br->setDebugLoc(DL1);
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IRBuilder<> Builder(Ctx);
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Builder.SetInsertPoint(Br);
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EXPECT_EQ(DL1, Builder.getCurrentDebugLocation());
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auto Call1 = Builder.CreateCall(Callee, None);
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EXPECT_EQ(DL1, Call1->getDebugLoc());
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Call1->setDebugLoc(DL2);
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Builder.SetInsertPoint(Call1->getParent(), Call1);
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EXPECT_EQ(DL2, Builder.getCurrentDebugLocation());
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auto Call2 = Builder.CreateCall(Callee, None);
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EXPECT_EQ(DL2, Call2->getDebugLoc());
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DIB.finalize();
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}
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}
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