1 //===--- AliasAnalysisTest.cpp - Mixed TBAA unit tests --------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Analysis/AliasAnalysis.h"
11 #include "llvm/Analysis/AssumptionCache.h"
12 #include "llvm/Analysis/BasicAliasAnalysis.h"
13 #include "llvm/Analysis/TargetLibraryInfo.h"
14 #include "llvm/IR/Constants.h"
15 #include "llvm/IR/Instructions.h"
16 #include "llvm/IR/LLVMContext.h"
17 #include "llvm/IR/Module.h"
18 #include "llvm/Support/CommandLine.h"
19 #include "gtest/gtest.h"
24 class AliasAnalysisTest : public testing::Test {
28 TargetLibraryInfoImpl TLII;
29 TargetLibraryInfo TLI;
30 std::unique_ptr<AssumptionCache> AC;
31 std::unique_ptr<BasicAAResult> BAR;
32 std::unique_ptr<AAResults> AAR;
34 AliasAnalysisTest() : M("AliasAnalysisTest", C), TLI(TLII) {}
36 AAResults &getAAResults(Function &F) {
37 // Reset the Function AA results first to clear out any references.
38 AAR.reset(new AAResults());
40 // Build the various AA results and register them.
41 AC.reset(new AssumptionCache(F));
42 BAR.reset(new BasicAAResult(M.getDataLayout(), TLI, *AC));
43 AAR->addAAResult(*BAR);
49 TEST_F(AliasAnalysisTest, getModRefInfo) {
52 FunctionType::get(Type::getVoidTy(C), std::vector<Type *>(), false);
53 auto *F = cast<Function>(M.getOrInsertFunction("f", FTy));
54 auto *BB = BasicBlock::Create(C, "entry", F);
55 auto IntType = Type::getInt32Ty(C);
56 auto PtrType = Type::getInt32PtrTy(C);
57 auto *Value = ConstantInt::get(IntType, 42);
58 auto *Addr = ConstantPointerNull::get(PtrType);
60 auto *Store1 = new StoreInst(Value, Addr, BB);
61 auto *Load1 = new LoadInst(Addr, "load", BB);
62 auto *Add1 = BinaryOperator::CreateAdd(Value, Value, "add", BB);
63 auto *VAArg1 = new VAArgInst(Addr, PtrType, "vaarg", BB);
64 auto *CmpXChg1 = new AtomicCmpXchgInst(Addr, ConstantInt::get(IntType, 0),
65 ConstantInt::get(IntType, 1),
66 Monotonic, Monotonic, CrossThread, BB);
68 new AtomicRMWInst(AtomicRMWInst::Xchg, Addr, ConstantInt::get(IntType, 1),
69 Monotonic, CrossThread, BB);
71 ReturnInst::Create(C, nullptr, BB);
73 auto &AA = getAAResults(*F);
75 // Check basic results
76 EXPECT_EQ(AA.getModRefInfo(Store1, MemoryLocation()), MRI_Mod);
77 EXPECT_EQ(AA.getModRefInfo(Store1), MRI_Mod);
78 EXPECT_EQ(AA.getModRefInfo(Load1, MemoryLocation()), MRI_Ref);
79 EXPECT_EQ(AA.getModRefInfo(Load1), MRI_Ref);
80 EXPECT_EQ(AA.getModRefInfo(Add1, MemoryLocation()), MRI_NoModRef);
81 EXPECT_EQ(AA.getModRefInfo(Add1), MRI_NoModRef);
82 EXPECT_EQ(AA.getModRefInfo(VAArg1, MemoryLocation()), MRI_ModRef);
83 EXPECT_EQ(AA.getModRefInfo(VAArg1), MRI_ModRef);
84 EXPECT_EQ(AA.getModRefInfo(CmpXChg1, MemoryLocation()), MRI_ModRef);
85 EXPECT_EQ(AA.getModRefInfo(CmpXChg1), MRI_ModRef);
86 EXPECT_EQ(AA.getModRefInfo(AtomicRMW, MemoryLocation()), MRI_ModRef);
87 EXPECT_EQ(AA.getModRefInfo(AtomicRMW), MRI_ModRef);
90 } // end anonymous namspace
91 } // end llvm namespace