1 //===--- GlobalsModRefTest.cpp - Mixed TBAA unit tests --------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/Analysis/GlobalsModRef.h"
10 #include "llvm/ADT/Triple.h"
11 #include "llvm/Analysis/CallGraph.h"
12 #include "llvm/Analysis/TargetLibraryInfo.h"
13 #include "llvm/AsmParser/Parser.h"
14 #include "llvm/Support/SourceMgr.h"
15 #include "gtest/gtest.h"
16
17 using namespace llvm;
18
TEST(GlobalsModRef,OptNone)19 TEST(GlobalsModRef, OptNone) {
20 StringRef Assembly = R"(
21 define void @f1() optnone {
22 ret void
23 }
24 define void @f2() optnone readnone {
25 ret void
26 }
27 define void @f3() optnone readonly {
28 ret void
29 }
30 )";
31
32 LLVMContext Context;
33 SMDiagnostic Error;
34 auto M = parseAssemblyString(Assembly, Error, Context);
35 ASSERT_TRUE(M) << "Bad assembly?";
36
37 const auto &funcs = M->functions();
38 auto I = funcs.begin();
39 ASSERT_NE(I, funcs.end());
40 const Function &F1 = *I;
41 ASSERT_NE(++I, funcs.end());
42 const Function &F2 = *I;
43 ASSERT_NE(++I, funcs.end());
44 const Function &F3 = *I;
45 EXPECT_EQ(++I, funcs.end());
46
47 Triple Trip(M->getTargetTriple());
48 TargetLibraryInfoImpl TLII(Trip);
49 TargetLibraryInfo TLI(TLII);
50 auto GetTLI = [&TLI](Function &F) -> TargetLibraryInfo & { return TLI; };
51 llvm::CallGraph CG(*M);
52
53 auto AAR = GlobalsAAResult::analyzeModule(*M, GetTLI, CG);
54
55 EXPECT_EQ(FMRB_UnknownModRefBehavior, AAR.getModRefBehavior(&F1));
56 EXPECT_EQ(FMRB_DoesNotAccessMemory, AAR.getModRefBehavior(&F2));
57 EXPECT_EQ(FMRB_OnlyReadsMemory, AAR.getModRefBehavior(&F3));
58 }
59