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[ThinLTO] Include linkage type in function summary

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Summary:
Adds the linkage type to both the per-module and combined function
summaries, which subsumes the current islocal bit. This will eventually
be used to optimized linkage types based on global summary-based
analysis.

Reviewers: joker.eph

Subscribers: joker.eph, davidxl, llvm-commits

Differential Revision: http://reviews.llvm.org/D16943

llvm-svn: 259993
This commit is contained in:
Teresa Johnson
2016-02-06 16:07:35 +00:00
parent 63b1ecab7d
commit 5e22e4461d
7 changed files with 99 additions and 25 deletions
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12
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -5592,14 +5592,14 @@ std::error_code FunctionIndexBitcodeReader::parseEntireSummary() {
switch (Stream.readRecord(Entry.ID, Record)) {
default: // Default behavior: ignore.
break;
// FS_PERMODULE_ENTRY: [valueid, islocal, instcount]
// FS_PERMODULE_ENTRY: [valueid, linkage, instcount]
case bitc::FS_CODE_PERMODULE_ENTRY: {
unsigned ValueID = Record[0];
bool IsLocal = Record[1];
uint64_t RawLinkage = Record[1];
unsigned InstCount = Record[2];
std::unique_ptr<FunctionSummary> FS =
llvm::make_unique<FunctionSummary>(InstCount);
FS->setLocalFunction(IsLocal);
FS->setFunctionLinkage(getDecodedLinkage(RawLinkage));
// The module path string ref set in the summary must be owned by the
// index's module string table. Since we don't have a module path
// string table section in the per-module index, we create a single
@@ -5609,12 +5609,14 @@ std::error_code FunctionIndexBitcodeReader::parseEntireSummary() {
TheIndex->addModulePath(Buffer->getBufferIdentifier(), 0));
SummaryMap[ValueID] = std::move(FS);
}
// FS_COMBINED_ENTRY: [modid, instcount]
// FS_COMBINED_ENTRY: [modid, linkage, instcount]
case bitc::FS_CODE_COMBINED_ENTRY: {
uint64_t ModuleId = Record[0];
unsigned InstCount = Record[1];
uint64_t RawLinkage = Record[1];
unsigned InstCount = Record[2];
std::unique_ptr<FunctionSummary> FS =
llvm::make_unique<FunctionSummary>(InstCount);
FS->setFunctionLinkage(getDecodedLinkage(RawLinkage));
FS->setModulePath(ModuleIdMap[ModuleId]);
SummaryMap[CurRecordBit] = std::move(FS);
}