llvm/unittests/Analysis/GlobalsModRefTest.cpp

   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/Analysis/CallGraph.h"
  11 #include "llvm/Analysis/TargetLibraryInfo.h"
  12 #include "llvm/AsmParser/Parser.h"
  13 #include "llvm/Support/SourceMgr.h"
  14 #include "llvm/TargetParser/Triple.h"
  15 #include "gtest/gtest.h"
  16
  17 using namespace llvm;
  18
  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(MemoryEffects::unknown(), AAR.getMemoryEffects(&F1));
  56   EXPECT_EQ(MemoryEffects::none(), AAR.getMemoryEffects(&F2));
  57   EXPECT_EQ(MemoryEffects::readOnly(), AAR.getMemoryEffects(&F3));
  58 }