[PM/AA] Hoist the interface for BasicAA into a header file.
[oota-llvm.git] / unittests / Analysis / AliasAnalysisTest.cpp
1 //===--- AliasAnalysisTest.cpp - Mixed TBAA unit tests --------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/Analysis/AliasAnalysis.h"
11 #include "llvm/Analysis/BasicAliasAnalysis.h"
12 #include "llvm/Analysis/Passes.h"
13 #include "llvm/IR/Constants.h"
14 #include "llvm/IR/Instructions.h"
15 #include "llvm/IR/LLVMContext.h"
16 #include "llvm/IR/Module.h"
17 #include "llvm/IR/LegacyPassManager.h"
18 #include "llvm/Support/CommandLine.h"
19 #include "gtest/gtest.h"
20
21 namespace llvm {
22 namespace {
23
24 class AliasAnalysisTest : public testing::Test {
25 protected:
26   AliasAnalysisTest() : M("AliasAnalysisTBAATest", C) {}
27
28   // This is going to check that calling getModRefInfo without a location, and
29   // with a default location, first, doesn't crash, and second, gives the right
30   // answer.
31   void CheckModRef(Instruction *I, ModRefInfo Result) {
32     static char ID;
33     class CheckModRefTestPass : public FunctionPass {
34     public:
35       CheckModRefTestPass(Instruction *I, ModRefInfo Result)
36           : FunctionPass(ID), ExpectResult(Result), I(I) {}
37       static int initialize() {
38         PassInfo *PI = new PassInfo("CheckModRef testing pass", "", &ID,
39                                     nullptr, true, true);
40         PassRegistry::getPassRegistry()->registerPass(*PI, false);
41         initializeAliasAnalysisAnalysisGroup(*PassRegistry::getPassRegistry());
42         initializeBasicAliasAnalysisPass(*PassRegistry::getPassRegistry());
43         return 0;
44       }
45       void getAnalysisUsage(AnalysisUsage &AU) const override {
46         AU.setPreservesAll();
47         AU.addRequiredTransitive<AliasAnalysis>();
48       }
49       bool runOnFunction(Function &) override {
50         AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
51         EXPECT_EQ(AA.getModRefInfo(I, MemoryLocation()), ExpectResult);
52         EXPECT_EQ(AA.getModRefInfo(I), ExpectResult);
53         return false;
54       }
55       ModRefInfo ExpectResult;
56       Instruction *I;
57     };
58     static int initialize = CheckModRefTestPass::initialize();
59     (void)initialize;
60     CheckModRefTestPass *P = new CheckModRefTestPass(I, Result);
61     legacy::PassManager PM;
62     PM.add(createBasicAliasAnalysisPass());
63     PM.add(P);
64     PM.run(M);
65   }
66
67   LLVMContext C;
68   Module M;
69 };
70
71 TEST_F(AliasAnalysisTest, getModRefInfo) {
72   // Setup function.
73   FunctionType *FTy =
74       FunctionType::get(Type::getVoidTy(C), std::vector<Type *>(), false);
75   auto *F = cast<Function>(M.getOrInsertFunction("f", FTy));
76   auto *BB = BasicBlock::Create(C, "entry", F);
77   auto IntType = Type::getInt32Ty(C);
78   auto PtrType = Type::getInt32PtrTy(C);
79   auto *Value = ConstantInt::get(IntType, 42);
80   auto *Addr = ConstantPointerNull::get(PtrType);
81
82   auto *Store1 = new StoreInst(Value, Addr, BB);
83   auto *Load1 = new LoadInst(Addr, "load", BB);
84   auto *Add1 = BinaryOperator::CreateAdd(Value, Value, "add", BB);
85   auto *VAArg1 = new VAArgInst(Addr, PtrType, "vaarg", BB);
86   auto *CmpXChg1 = new AtomicCmpXchgInst(Addr, ConstantInt::get(IntType, 0),
87                                          ConstantInt::get(IntType, 1),
88                                          Monotonic, Monotonic, CrossThread, BB);
89   auto *AtomicRMW =
90       new AtomicRMWInst(AtomicRMWInst::Xchg, Addr, ConstantInt::get(IntType, 1),
91                         Monotonic, CrossThread, BB);
92
93   ReturnInst::Create(C, nullptr, BB);
94
95   // Check basic results
96   CheckModRef(Store1, MRI_Mod);
97   CheckModRef(Load1, MRI_Ref);
98   CheckModRef(Add1, MRI_NoModRef);
99   CheckModRef(VAArg1, MRI_ModRef);
100   CheckModRef(CmpXChg1, MRI_ModRef);
101   CheckModRef(AtomicRMW, MRI_ModRef);
102 }
103
104 } // end anonymous namspace
105 } // end llvm namespace