forked from OSchip/llvm-project
90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
//=======- AliasSetTrackerTest.cpp - Unit test for the Alias Set Tracker -===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Analysis/AliasAnalysis.h"
|
|
#include "llvm/Analysis/AliasSetTracker.h"
|
|
#include "llvm/Analysis/TypeBasedAliasAnalysis.h"
|
|
#include "llvm/AsmParser/Parser.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
#include "llvm/IR/Module.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "gtest/gtest.h"
|
|
|
|
using namespace llvm;
|
|
|
|
TEST(AliasSetTracker, AliasUnknownInst) {
|
|
StringRef Assembly = R"(
|
|
@a = common global i32 0, align 4
|
|
@b = common global float 0.000000e+00, align 4
|
|
|
|
; Function Attrs: nounwind ssp uwtable
|
|
define i32 @read_a() #0 {
|
|
%1 = load i32, i32* @a, align 4, !tbaa !3
|
|
ret i32 %1
|
|
}
|
|
|
|
; Function Attrs: nounwind ssp uwtable
|
|
define void @write_b() #0 {
|
|
store float 1.000000e+01, float* @b, align 4, !tbaa !7
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind ssp uwtable
|
|
define void @test() #0 {
|
|
%1 = call i32 @read_a(), !tbaa !3
|
|
call void @write_b(), !tbaa !7
|
|
ret void
|
|
}
|
|
|
|
!3 = !{!4, !4, i64 0}
|
|
!4 = !{!"int", !5, i64 0}
|
|
!5 = !{!"omnipotent char", !6, i64 0}
|
|
!6 = !{!"Simple C/C++ TBAA"}
|
|
!7 = !{!8, !8, i64 0}
|
|
!8 = !{!"float", !5, i64 0}
|
|
)";
|
|
|
|
// Parse the IR. The two calls in @test can not access aliasing elements.
|
|
LLVMContext Context;
|
|
SMDiagnostic Error;
|
|
auto M = parseAssemblyString(Assembly, Error, Context);
|
|
ASSERT_TRUE(M) << "Bad assembly?";
|
|
|
|
// Initialize the alias result.
|
|
Triple Trip(M->getTargetTriple());
|
|
TargetLibraryInfoImpl TLII(Trip);
|
|
TargetLibraryInfo TLI(TLII);
|
|
AAResults AA(TLI);
|
|
TypeBasedAAResult TBAAR;
|
|
AA.addAAResult(TBAAR);
|
|
|
|
// Initialize the alias set tracker for the @test function.
|
|
Function *Test = M->getFunction("test");
|
|
ASSERT_NE(Test, nullptr);
|
|
AliasSetTracker AST(AA);
|
|
for (auto &BB : *Test)
|
|
AST.add(BB);
|
|
// There should be 2 disjoint alias sets. 1 from each call.
|
|
ASSERT_EQ((int)AST.getAliasSets().size(), 2);
|
|
|
|
// Directly test aliasesUnknownInst.
|
|
// Now every call instruction should only alias one alias set.
|
|
for (auto &Inst : *Test->begin()) {
|
|
bool FoundAS = false;
|
|
for (AliasSet &AS : AST) {
|
|
if (!Inst.mayReadOrWriteMemory())
|
|
continue;
|
|
if (!AS.aliasesUnknownInst(&Inst, AA))
|
|
continue;
|
|
ASSERT_NE(FoundAS, true);
|
|
FoundAS = true;
|
|
}
|
|
}
|
|
}
|