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[ThinLTO] Add FunctionAttrs to ThinLTO index

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Adds function attributes to index: ReadNone, ReadOnly, NoRecurse, NoAlias. This attributes will be used for future ThinLTO optimizations that will propagate function attributes across modules.

llvm-svn: 310061
This commit is contained in:
Charles Saternos
2017-08-04 16:00:58 +00:00
parent 79e7f6b3e3
commit 75da10d1b2
14 changed files with 142 additions and 44 deletions
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23
llvm/lib/Analysis/ModuleSummaryAnalysis.cpp
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@@ -276,10 +276,16 @@ computeFunctionSummary(ModuleSummaryIndex &Index, const Module &M,
F.isVarArg();
GlobalValueSummary::GVFlags Flags(F.getLinkage(), NotEligibleForImport,
/* Live = */ false);
FunctionSummary::FFlags FunFlags{
F.hasFnAttribute(Attribute::ReadNone),
F.hasFnAttribute(Attribute::ReadOnly),
F.hasFnAttribute(Attribute::NoRecurse),
F.returnDoesNotAlias(),
};
auto FuncSummary = llvm::make_unique<FunctionSummary>(
Flags, NumInsts, RefEdges.takeVector(), CallGraphEdges.takeVector(),
TypeTests.takeVector(), TypeTestAssumeVCalls.takeVector(),
TypeCheckedLoadVCalls.takeVector(),
Flags, NumInsts, FunFlags, RefEdges.takeVector(),
CallGraphEdges.takeVector(), TypeTests.takeVector(),
TypeTestAssumeVCalls.takeVector(), TypeCheckedLoadVCalls.takeVector(),
TypeTestAssumeConstVCalls.takeVector(),
TypeCheckedLoadConstVCalls.takeVector());
if (NonRenamableLocal)
@@ -427,11 +433,16 @@ ModuleSummaryIndex llvm::buildModuleSummaryIndex(
/* Live = */ true);
CantBePromoted.insert(GlobalValue::getGUID(Name));
// Create the appropriate summary type.
if (isa<Function>(GV)) {
if (Function *F = dyn_cast<Function>(GV)) {
std::unique_ptr<FunctionSummary> Summary =
llvm::make_unique<FunctionSummary>(
GVFlags, 0, ArrayRef<ValueInfo>{},
ArrayRef<FunctionSummary::EdgeTy>{},
GVFlags, 0,
FunctionSummary::FFlags{
F->hasFnAttribute(Attribute::ReadNone),
F->hasFnAttribute(Attribute::ReadOnly),
F->hasFnAttribute(Attribute::NoRecurse),
F->returnDoesNotAlias()},
ArrayRef<ValueInfo>{}, ArrayRef<FunctionSummary::EdgeTy>{},
ArrayRef<GlobalValue::GUID>{},
ArrayRef<FunctionSummary::VFuncId>{},
ArrayRef<FunctionSummary::VFuncId>{},