You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.9 KiB
91 lines
2.9 KiB
//===--- TBAATest.cpp - Mixed TBAA unit tests -----------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/AliasAnalysisEvaluator.h"
|
|
#include "llvm/Analysis/Passes.h"
|
|
#include "llvm/IR/Constants.h"
|
|
#include "llvm/IR/Instructions.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/LegacyPassManager.h"
|
|
#include "llvm/IR/MDBuilder.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/IR/Verifier.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
namespace llvm {
|
|
namespace {
|
|
|
|
class TBAATest : public testing::Test {
|
|
protected:
|
|
TBAATest() : M("TBAATest", C), MD(C) {}
|
|
|
|
LLVMContext C;
|
|
Module M;
|
|
MDBuilder MD;
|
|
};
|
|
|
|
static StoreInst *getFunctionWithSingleStore(Module *M, StringRef Name) {
|
|
auto &C = M->getContext();
|
|
FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), {});
|
|
auto *F = Function::Create(FTy, Function::ExternalLinkage, Name, M);
|
|
auto *BB = BasicBlock::Create(C, "entry", F);
|
|
auto *IntType = Type::getInt32Ty(C);
|
|
auto *PtrType = Type::getInt32PtrTy(C);
|
|
auto *SI = new StoreInst(ConstantInt::get(IntType, 42),
|
|
ConstantPointerNull::get(PtrType), BB);
|
|
ReturnInst::Create(C, nullptr, BB);
|
|
|
|
return SI;
|
|
}
|
|
|
|
TEST_F(TBAATest, checkVerifierBehaviorForOldTBAA) {
|
|
auto *SI = getFunctionWithSingleStore(&M, "f1");
|
|
auto *F = SI->getFunction();
|
|
|
|
// C++ unit test case to avoid going through the auto upgrade logic.
|
|
auto *RootMD = MD.createTBAARoot("Simple C/C++ TBAA");
|
|
auto *MD1 = MD.createTBAANode("omnipotent char", RootMD);
|
|
auto *MD2 = MD.createTBAANode("int", MD1);
|
|
SI->setMetadata(LLVMContext::MD_tbaa, MD2);
|
|
|
|
SmallVector<char, 0> ErrorMsg;
|
|
raw_svector_ostream Outs(ErrorMsg);
|
|
|
|
StringRef ExpectedFailureMsg(
|
|
"Old-style TBAA is no longer allowed, use struct-path TBAA instead");
|
|
|
|
EXPECT_TRUE(verifyFunction(*F, &Outs));
|
|
EXPECT_TRUE(StringRef(ErrorMsg.begin(), ErrorMsg.size())
|
|
.startswith(ExpectedFailureMsg));
|
|
}
|
|
|
|
TEST_F(TBAATest, checkTBAAMerging) {
|
|
auto *SI = getFunctionWithSingleStore(&M, "f2");
|
|
auto *F = SI->getFunction();
|
|
|
|
auto *RootMD = MD.createTBAARoot("tbaa-root");
|
|
auto *MD1 = MD.createTBAANode("scalar-a", RootMD);
|
|
auto *StructTag1 = MD.createTBAAStructTagNode(MD1, MD1, 0);
|
|
auto *MD2 = MD.createTBAANode("scalar-b", RootMD);
|
|
auto *StructTag2 = MD.createTBAAStructTagNode(MD2, MD2, 0);
|
|
|
|
auto *GenericMD = MDNode::getMostGenericTBAA(StructTag1, StructTag2);
|
|
|
|
EXPECT_EQ(GenericMD, nullptr);
|
|
|
|
// Despite GenericMD being nullptr, we expect the setMetadata call to be well
|
|
// defined and produce a well-formed function.
|
|
SI->setMetadata(LLVMContext::MD_tbaa, GenericMD);
|
|
|
|
EXPECT_TRUE(!verifyFunction(*F));
|
|
}
|
|
|
|
} // end anonymous namspace
|
|
} // end llvm namespace
|