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846be29e5e
Recommit r352791 after tweaking DerivedTypes.h slightly, so that gcc
doesn't choke on it, hopefully.
Original Message:
The FunctionCallee type is effectively a {FunctionType*,Value*} pair,
and is a useful convenience to enable code to continue passing the
result of getOrInsertFunction() through to EmitCall, even once pointer
types lose their pointee-type.
Then:
- update the CallInst/InvokeInst instruction creation functions to
take a Callee,
- modify getOrInsertFunction to return FunctionCallee, and
- update all callers appropriately.
One area of particular note is the change to the sanitizer
code. Previously, they had been casting the result of
`getOrInsertFunction` to a `Function*` via
`checkSanitizerInterfaceFunction`, and storing that. That would report
an error if someone had already inserted a function declaraction with
a mismatching signature.
However, in general, LLVM allows for such mismatches, as
`getOrInsertFunction` will automatically insert a bitcast if
needed. As part of this cleanup, cause the sanitizer code to do the
same. (It will call its functions using the expected signature,
however they may have been declared.)
Finally, in a small number of locations, callers of
`getOrInsertFunction` actually were expecting/requiring that a brand
new function was being created. In such cases, I've switched them to
Function::Create instead.
Differential Revision: https://reviews.llvm.org/D57315
llvm-svn: 352827
91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
//===--- TBAATest.cpp - Mixed TBAA 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/AliasAnalysisEvaluator.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/LegacyPassManager.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/Verifier.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 TBAATest : public testing::Test {
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protected:
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TBAATest() : M("TBAATest", C), MD(C) {}
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LLVMContext C;
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Module M;
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MDBuilder MD;
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};
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static StoreInst *getFunctionWithSingleStore(Module *M, StringRef Name) {
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auto &C = M->getContext();
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FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), {});
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auto *F = Function::Create(FTy, Function::ExternalLinkage, Name, M);
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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 *SI = new StoreInst(ConstantInt::get(IntType, 42),
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ConstantPointerNull::get(PtrType), BB);
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ReturnInst::Create(C, nullptr, BB);
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return SI;
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}
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TEST_F(TBAATest, checkVerifierBehaviorForOldTBAA) {
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auto *SI = getFunctionWithSingleStore(&M, "f1");
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auto *F = SI->getFunction();
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// C++ unit test case to avoid going through the auto upgrade logic.
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auto *RootMD = MD.createTBAARoot("Simple C/C++ TBAA");
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auto *MD1 = MD.createTBAANode("omnipotent char", RootMD);
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auto *MD2 = MD.createTBAANode("int", MD1);
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SI->setMetadata(LLVMContext::MD_tbaa, MD2);
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SmallVector<char, 0> ErrorMsg;
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raw_svector_ostream Outs(ErrorMsg);
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StringRef ExpectedFailureMsg(
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"Old-style TBAA is no longer allowed, use struct-path TBAA instead");
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EXPECT_TRUE(verifyFunction(*F, &Outs));
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EXPECT_TRUE(StringRef(ErrorMsg.begin(), ErrorMsg.size())
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.startswith(ExpectedFailureMsg));
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}
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TEST_F(TBAATest, checkTBAAMerging) {
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auto *SI = getFunctionWithSingleStore(&M, "f2");
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auto *F = SI->getFunction();
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auto *RootMD = MD.createTBAARoot("tbaa-root");
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auto *MD1 = MD.createTBAANode("scalar-a", RootMD);
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auto *StructTag1 = MD.createTBAAStructTagNode(MD1, MD1, 0);
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auto *MD2 = MD.createTBAANode("scalar-b", RootMD);
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auto *StructTag2 = MD.createTBAAStructTagNode(MD2, MD2, 0);
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auto *GenericMD = MDNode::getMostGenericTBAA(StructTag1, StructTag2);
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EXPECT_EQ(GenericMD, nullptr);
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// Despite GenericMD being nullptr, we expect the setMetadata call to be well
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// defined and produce a well-formed function.
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SI->setMetadata(LLVMContext::MD_tbaa, GenericMD);
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EXPECT_TRUE(!verifyFunction(*F));
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}
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} // end anonymous namspace
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} // end llvm namespace
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