forked from OSchip/llvm-project
62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
//===- LoadsTest.cpp - local load analysis unit tests ---------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Loads.h"
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#include "llvm/AsmParser/Parser.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/Support/SourceMgr.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) {
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SMDiagnostic Err;
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std::unique_ptr<Module> Mod = parseAssemblyString(IR, Err, C);
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if (!Mod)
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Err.print("AnalysisTests", errs());
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return Mod;
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}
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TEST(LoadsTest, FindAvailableLoadedValueSameBasePtrConstantOffsetsNullAA) {
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LLVMContext C;
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std::unique_ptr<Module> M = parseIR(C,
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R"IR(
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%class = type <{ i32, i32 }>
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define i32 @f() {
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entry:
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%o = alloca %class
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%f1 = getelementptr inbounds %class, %class* %o, i32 0, i32 0
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store i32 42, i32* %f1
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%f2 = getelementptr inbounds %class, %class* %o, i32 0, i32 1
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store i32 43, i32* %f2
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%v = load i32, i32* %f1
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ret i32 %v
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}
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)IR");
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auto *GV = M->getNamedValue("f");
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ASSERT_TRUE(GV);
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auto *F = dyn_cast<Function>(GV);
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ASSERT_TRUE(F);
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Instruction *Inst = &F->front().front();
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auto *AI = dyn_cast<AllocaInst>(Inst);
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ASSERT_TRUE(AI);
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Inst = &*++F->front().rbegin();
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auto *LI = dyn_cast<LoadInst>(Inst);
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ASSERT_TRUE(LI);
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BasicBlock::iterator BBI(LI);
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Value *Loaded = FindAvailableLoadedValue(
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LI, LI->getParent(), BBI, 0, nullptr, nullptr);
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ASSERT_TRUE(Loaded);
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auto *CI = dyn_cast<ConstantInt>(Loaded);
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ASSERT_TRUE(CI);
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ASSERT_TRUE(CI->equalsInt(42));
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}
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