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9be4aefa57
In order to enable the preservation of noalias function parameter information after inlining, and the representation of block-level __restrict__ pointer information (etc.), additional kinds of aliasing metadata will be introduced. This metadata needs to be carried around in AliasAnalysis::Location objects (and MMOs at the SDAG level), and so we need to generalize the current scheme (which is hard-coded to just one TBAA MDNode*). This commit introduces only the necessary refactoring to allow for the introduction of other aliasing metadata types, but does not actually introduce any (that will come in a follow-up commit). What it does introduce is a new AAMDNodes structure to hold all of the aliasing metadata nodes associated with a particular memory-accessing instruction, and uses that structure instead of the raw MDNode* in AliasAnalysis::Location, etc. No functionality change intended. llvm-svn: 213859
78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
//===--- MixedTBAATest.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/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/MDBuilder.h"
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#include "llvm/IR/Module.h"
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#include "llvm/PassManager.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 MixedTBAATest : public testing::Test {
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protected:
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MixedTBAATest() : M("MixedTBAATest", 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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PassManager PM;
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};
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TEST_F(MixedTBAATest, MixedTBAA) {
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// Setup function.
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FunctionType *FTy = FunctionType::get(Type::getVoidTy(C),
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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 *Store2 = new StoreInst(Value, Addr, BB);
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ReturnInst::Create(C, nullptr, BB);
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// New TBAA metadata
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{
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auto RootMD = MD.createTBAARoot("Simple C/C++ TBAA");
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auto MD1 = MD.createTBAAScalarTypeNode("omnipotent char", RootMD);
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auto MD2 = MD.createTBAAScalarTypeNode("int", MD1);
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auto MD3 = MD.createTBAAStructTagNode(MD2, MD2, 0);
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Store2->setMetadata(LLVMContext::MD_tbaa, MD3);
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}
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// Old TBAA metadata
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{
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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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Store1->setMetadata(LLVMContext::MD_tbaa, MD2);
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}
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// Run the TBAA eval pass on a mixture of path-aware and non-path-aware TBAA.
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// The order of the metadata (path-aware vs non-path-aware) is important,
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// because the AA eval pass only runs one test per store-pair.
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const char* args[] = { "MixedTBAATest", "-evaluate-aa-metadata" };
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cl::ParseCommandLineOptions(sizeof(args) / sizeof(const char*), args);
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PM.add(createTypeBasedAliasAnalysisPass());
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PM.add(createAAEvalPass());
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PM.run(M);
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}
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} // end anonymous namspace
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} // end llvm namespace
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