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[CSSPGO] Fix redundant reading of profile metadata #129609

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merged 2 commits into from
Mar 4, 2025
Merged

[CSSPGO] Fix redundant reading of profile metadata #129609

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15df878
[CSSPGO] Fix repeated reading of profile metadata
wlei-llvm Mar 3, 2025
cd164c2
return early if FuncsToUse is empty
wlei-llvm Mar 3, 2025
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2 changes: 1 addition & 1 deletion llvm/include/llvm/ProfileData/SampleProfReader.h
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Original file line number Diff line number Diff line change
Expand Up @@ -777,7 +777,7 @@ class SampleProfileReaderExtBinaryBase : public SampleProfileReaderBinary {
std::error_code readSecHdrTable();

std::error_code readFuncMetadata(bool ProfileHasAttribute,
SampleProfileMap &Profiles);
DenseSet<FunctionSamples *> &Profiles);
std::error_code readFuncMetadata(bool ProfileHasAttribute);
std::error_code readFuncMetadata(bool ProfileHasAttribute,
FunctionSamples *FProfile);
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20 changes: 14 additions & 6 deletions llvm/lib/ProfileData/SampleProfReader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -826,13 +826,23 @@ bool SampleProfileReaderExtBinaryBase::useFuncOffsetList() const {
std::error_code
SampleProfileReaderExtBinaryBase::read(const DenseSet<StringRef> &FuncsToUse,
SampleProfileMap &Profiles) {
if (FuncsToUse.empty())
return sampleprof_error::success;

Data = ProfileSecRange.first;
End = ProfileSecRange.second;
if (std::error_code EC = readFuncProfiles(FuncsToUse, Profiles))
return EC;
End = Data;
DenseSet<FunctionSamples *> ProfilesToReadMetadata;
for (auto FName : FuncsToUse) {
auto I = Profiles.find(FName);
if (I != Profiles.end())
ProfilesToReadMetadata.insert(&I->second);
}

if (std::error_code EC = readFuncMetadata(ProfileHasAttribute, Profiles))
if (std::error_code EC =
readFuncMetadata(ProfileHasAttribute, ProfilesToReadMetadata))
return EC;
return sampleprof_error::success;
}
Expand Down Expand Up @@ -1300,14 +1310,12 @@ SampleProfileReaderExtBinaryBase::readFuncMetadata(bool ProfileHasAttribute,
return sampleprof_error::success;
}

std::error_code
SampleProfileReaderExtBinaryBase::readFuncMetadata(bool ProfileHasAttribute,
SampleProfileMap &Profiles) {
std::error_code SampleProfileReaderExtBinaryBase::readFuncMetadata(
bool ProfileHasAttribute, DenseSet<FunctionSamples *> &Profiles) {
if (FuncMetadataIndex.empty())
return sampleprof_error::success;

for (auto &I : Profiles) {
FunctionSamples *FProfile = &I.second;
for (auto *FProfile : Profiles) {
auto R = FuncMetadataIndex.find(FProfile->getContext().getHashCode());
if (R == FuncMetadataIndex.end())
continue;
Expand Down
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