forked from OSchip/llvm-project
95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
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//===--- AliasAnalysisTest.cpp - Mixed TBAA unit 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/Analysis/AliasAnalysis.h"
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#include "llvm/Analysis/Passes.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/Support/CommandLine.h"
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#include "gtest/gtest.h"
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namespace llvm {
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namespace {
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class AliasAnalysisTest : public testing::Test {
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protected:
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AliasAnalysisTest() : M("AliasAnalysisTBAATest", C) {}
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// This is going to check that calling getModRefInfo without a location, and
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// with a default location, first, doesn't crash, and second, gives the right
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// answer.
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void CheckModRef(Instruction *I, AliasAnalysis::ModRefResult Result) {
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static char ID;
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class CheckModRefTestPass : public FunctionPass {
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public:
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CheckModRefTestPass(Instruction *I, AliasAnalysis::ModRefResult Result)
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: FunctionPass(ID), ExpectResult(Result), I(I) {}
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static int initialize() {
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PassInfo *PI = new PassInfo("CheckModRef testing pass", "", &ID,
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nullptr, true, true);
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PassRegistry::getPassRegistry()->registerPass(*PI, false);
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initializeAliasAnalysisAnalysisGroup(*PassRegistry::getPassRegistry());
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initializeBasicAliasAnalysisPass(*PassRegistry::getPassRegistry());
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return 0;
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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AU.addRequiredTransitive<AliasAnalysis>();
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}
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bool runOnFunction(Function &) override {
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AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
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EXPECT_EQ(AA.getModRefInfo(I, AliasAnalysis::Location()), ExpectResult);
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EXPECT_EQ(AA.getModRefInfo(I), ExpectResult);
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return false;
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}
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AliasAnalysis::ModRefResult ExpectResult;
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Instruction *I;
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};
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static int initialize = CheckModRefTestPass::initialize();
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(void)initialize;
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CheckModRefTestPass *P = new CheckModRefTestPass(I, Result);
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legacy::PassManager PM;
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PM.add(createBasicAliasAnalysisPass());
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PM.add(P);
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PM.run(M);
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}
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LLVMContext C;
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Module M;
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};
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TEST_F(AliasAnalysisTest, getModRefInfo) {
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// Setup function.
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FunctionType *FTy =
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FunctionType::get(Type::getVoidTy(C), std::vector<Type *>(), false);
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auto *F = cast<Function>(M.getOrInsertFunction("f", FTy));
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auto *BB = BasicBlock::Create(C, "entry", F);
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auto IntType = Type::getInt32Ty(C);
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auto PtrType = Type::getInt32PtrTy(C);
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auto *Value = ConstantInt::get(IntType, 42);
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auto *Addr = ConstantPointerNull::get(PtrType);
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auto *Store1 = new StoreInst(Value, Addr, BB);
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auto *Load1 = new LoadInst(Addr, "load", BB);
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auto *Add1 = BinaryOperator::CreateAdd(Value, Value, "add", BB);
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ReturnInst::Create(C, nullptr, BB);
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// Check basic results
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CheckModRef(Store1, AliasAnalysis::ModRefResult::Mod);
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CheckModRef(Load1, AliasAnalysis::ModRefResult::Ref);
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CheckModRef(Add1, AliasAnalysis::ModRefResult::NoModRef);
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}
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} // end anonymous namspace
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} // end llvm namespace
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