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Reorganize GlobalValueSummary with a "Flags" bitfield.

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Right now it only contains the LinkageType, but will be extended
with "hasSection", "isOptSize", "hasInlineAssembly", etc.

Differential Revision: http://reviews.llvm.org/D19404

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 267319
This commit is contained in:
Mehdi Amini
2016-04-24 03:18:18 +00:00
parent 8fe6936e18
commit c3ed48c1bd
8 changed files with 136 additions and 103 deletions
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62
llvm/lib/Bitcode/Reader/BitcodeReader.cpp
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@@ -738,6 +738,16 @@ static GlobalValue::LinkageTypes getDecodedLinkage(unsigned Val) {
}
}
// Decode the flags for GlobalValue in the summary
static GlobalValueSummary::GVFlags getDecodedGVSummaryFlags(uint64_t RawFlags,
uint64_t Version) {
// Summary were not emitted before LLVM 3.9, we don't need to upgrade Linkage
// like getDecodedLinkage() above. Any future change to the linkage enum and
// to getDecodedLinkage() will need to be taken into account here as above.
auto Linkage = GlobalValue::LinkageTypes(RawFlags & 0xF); // 4 bits
return GlobalValueSummary::GVFlags(Linkage);
}
static GlobalValue::VisibilityTypes getDecodedVisibility(unsigned Val) {
switch (Val) {
default: // Map unknown visibilities to default.
@@ -6051,19 +6061,20 @@ std::error_code ModuleSummaryIndexBitcodeReader::parseEntireSummary() {
switch (BitCode) {
default: // Default behavior: ignore.
break;
// FS_PERMODULE: [valueid, linkage, instcount, numrefs, numrefs x valueid,
// FS_PERMODULE: [valueid, flags, instcount, numrefs, numrefs x valueid,
// n x (valueid, callsitecount)]
// FS_PERMODULE_PROFILE: [valueid, linkage, instcount, numrefs,
// FS_PERMODULE_PROFILE: [valueid, flags, instcount, numrefs,
// numrefs x valueid,
// n x (valueid, callsitecount, profilecount)]
case bitc::FS_PERMODULE:
case bitc::FS_PERMODULE_PROFILE: {
unsigned ValueID = Record[0];
uint64_t RawLinkage = Record[1];
uint64_t RawFlags = Record[1];
unsigned InstCount = Record[2];
unsigned NumRefs = Record[3];
std::unique_ptr<FunctionSummary> FS = llvm::make_unique<FunctionSummary>(
getDecodedLinkage(RawLinkage), InstCount);
auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
std::unique_ptr<FunctionSummary> FS =
llvm::make_unique<FunctionSummary>(Flags, InstCount);
// 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
@@ -6097,15 +6108,15 @@ std::error_code ModuleSummaryIndexBitcodeReader::parseEntireSummary() {
Info->setSummary(std::move(FS));
break;
}
// FS_ALIAS: [valueid, linkage, valueid]
// FS_ALIAS: [valueid, flags, valueid]
// Aliases must be emitted (and parsed) after all FS_PERMODULE entries, as
// they expect all aliasee summaries to be available.
case bitc::FS_ALIAS: {
unsigned ValueID = Record[0];
uint64_t RawLinkage = Record[1];
uint64_t RawFlags = Record[1];
unsigned AliaseeID = Record[2];
std::unique_ptr<AliasSummary> AS =
llvm::make_unique<AliasSummary>(getDecodedLinkage(RawLinkage));
auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
std::unique_ptr<AliasSummary> AS = llvm::make_unique<AliasSummary>(Flags);
// 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
@@ -6127,12 +6138,13 @@ std::error_code ModuleSummaryIndexBitcodeReader::parseEntireSummary() {
Info->setSummary(std::move(AS));
break;
}
// FS_PERMODULE_GLOBALVAR_INIT_REFS: [valueid, linkage, n x valueid]
// FS_PERMODULE_GLOBALVAR_INIT_REFS: [valueid, flags, n x valueid]
case bitc::FS_PERMODULE_GLOBALVAR_INIT_REFS: {
unsigned ValueID = Record[0];
uint64_t RawLinkage = Record[1];
uint64_t RawFlags = Record[1];
auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
std::unique_ptr<GlobalVarSummary> FS =
llvm::make_unique<GlobalVarSummary>(getDecodedLinkage(RawLinkage));
llvm::make_unique<GlobalVarSummary>(Flags);
FS->setModulePath(
TheIndex->addModulePath(Buffer->getBufferIdentifier(), 0)->first());
for (unsigned I = 2, E = Record.size(); I != E; ++I) {
@@ -6147,19 +6159,20 @@ std::error_code ModuleSummaryIndexBitcodeReader::parseEntireSummary() {
Info->setSummary(std::move(FS));
break;
}
// FS_COMBINED: [modid, linkage, instcount, numrefs, numrefs x valueid,
// FS_COMBINED: [modid, flags, instcount, numrefs, numrefs x valueid,
// n x (valueid, callsitecount)]
// FS_COMBINED_PROFILE: [modid, linkage, instcount, numrefs,
// FS_COMBINED_PROFILE: [modid, flags, instcount, numrefs,
// numrefs x valueid,
// n x (valueid, callsitecount, profilecount)]
case bitc::FS_COMBINED:
case bitc::FS_COMBINED_PROFILE: {
uint64_t ModuleId = Record[0];
uint64_t RawLinkage = Record[1];
uint64_t RawFlags = Record[1];
unsigned InstCount = Record[2];
unsigned NumRefs = Record[3];
std::unique_ptr<FunctionSummary> FS = llvm::make_unique<FunctionSummary>(
getDecodedLinkage(RawLinkage), InstCount);
auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
std::unique_ptr<FunctionSummary> FS =
llvm::make_unique<FunctionSummary>(Flags, InstCount);
LastSeenSummary = FS.get();
FS->setModulePath(ModuleIdMap[ModuleId]);
static int RefListStartIndex = 4;
@@ -6187,15 +6200,15 @@ std::error_code ModuleSummaryIndexBitcodeReader::parseEntireSummary() {
Combined = true;
break;
}
// FS_COMBINED_ALIAS: [modid, linkage, offset]
// FS_COMBINED_ALIAS: [modid, flags, offset]
// Aliases must be emitted (and parsed) after all FS_COMBINED entries, as
// they expect all aliasee summaries to be available.
case bitc::FS_COMBINED_ALIAS: {
uint64_t ModuleId = Record[0];
uint64_t RawLinkage = Record[1];
uint64_t RawFlags = Record[1];
uint64_t AliaseeSummaryOffset = Record[2];
std::unique_ptr<AliasSummary> AS =
llvm::make_unique<AliasSummary>(getDecodedLinkage(RawLinkage));
auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
std::unique_ptr<AliasSummary> AS = llvm::make_unique<AliasSummary>(Flags);
LastSeenSummary = AS.get();
AS->setModulePath(ModuleIdMap[ModuleId]);
@@ -6210,12 +6223,13 @@ std::error_code ModuleSummaryIndexBitcodeReader::parseEntireSummary() {
Combined = true;
break;
}
// FS_COMBINED_GLOBALVAR_INIT_REFS: [modid, linkage, n x valueid]
// FS_COMBINED_GLOBALVAR_INIT_REFS: [modid, flags, n x valueid]
case bitc::FS_COMBINED_GLOBALVAR_INIT_REFS: {
uint64_t ModuleId = Record[0];
uint64_t RawLinkage = Record[1];
uint64_t RawFlags = Record[1];
auto Flags = getDecodedGVSummaryFlags(RawFlags, Version);
std::unique_ptr<GlobalVarSummary> FS =
llvm::make_unique<GlobalVarSummary>(getDecodedLinkage(RawLinkage));
llvm::make_unique<GlobalVarSummary>(Flags);
LastSeenSummary = FS.get();
FS->setModulePath(ModuleIdMap[ModuleId]);
for (unsigned I = 2, E = Record.size(); I != E; ++I) {