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0062c013da
Summary: This is the first change to enable the TLI to be built per-function so that -fno-builtin* handling can be migrated to use function attributes. See discussion on D61634 for background. This is an enabler for fixing handling of these options for LTO, for example. This change should not affect behavior, as the provided function is not yet used to build a specifically per-function TLI, but rather enables that migration. Most of the changes were very mechanical, e.g. passing a Function to the legacy analysis pass's getTLI interface, or in Module level cases, adding a callback. This is similar to the way the per-function TTI analysis works. There was one place where we were looking for builtins but not in the context of a specific function. See FindCXAAtExit in lib/Transforms/IPO/GlobalOpt.cpp. I'm somewhat concerned my workaround could provide the wrong behavior in some corner cases. Suggestions welcome. Reviewers: chandlerc, hfinkel Subscribers: arsenm, dschuff, jvesely, nhaehnle, mehdi_amini, javed.absar, sbc100, jgravelle-google, eraman, aheejin, steven_wu, george.burgess.iv, dexonsmith, jfb, asbirlea, gchatelet, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66428 llvm-svn: 371284
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
//===--- GlobalsModRefTest.cpp - Mixed TBAA unit tests --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/GlobalsModRef.h"
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#include "llvm/AsmParser/Parser.h"
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#include "llvm/Support/SourceMgr.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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TEST(GlobalsModRef, OptNone) {
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StringRef Assembly = R"(
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define void @f1() optnone {
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ret void
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}
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define void @f2() optnone readnone {
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ret void
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}
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define void @f3() optnone readonly {
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ret void
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}
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)";
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LLVMContext Context;
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SMDiagnostic Error;
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auto M = parseAssemblyString(Assembly, Error, Context);
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ASSERT_TRUE(M) << "Bad assembly?";
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const auto &funcs = M->functions();
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auto I = funcs.begin();
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ASSERT_NE(I, funcs.end());
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const Function &F1 = *I;
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ASSERT_NE(++I, funcs.end());
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const Function &F2 = *I;
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ASSERT_NE(++I, funcs.end());
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const Function &F3 = *I;
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EXPECT_EQ(++I, funcs.end());
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Triple Trip(M->getTargetTriple());
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TargetLibraryInfoImpl TLII(Trip);
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TargetLibraryInfo TLI(TLII);
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auto GetTLI = [&TLI](Function &F) -> TargetLibraryInfo & { return TLI; };
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llvm::CallGraph CG(*M);
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auto AAR = GlobalsAAResult::analyzeModule(*M, GetTLI, CG);
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EXPECT_EQ(FMRB_UnknownModRefBehavior, AAR.getModRefBehavior(&F1));
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EXPECT_EQ(FMRB_DoesNotAccessMemory, AAR.getModRefBehavior(&F2));
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EXPECT_EQ(FMRB_OnlyReadsMemory, AAR.getModRefBehavior(&F3));
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}
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