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Add show and merge tools for sample PGO profiles.

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Summary:
This patch extends the 'show' and 'merge' commands in llvm-profdata to handle
sample PGO formats. Using the 'merge' command it is now possible to convert
one sample PGO format to another.

The only format that is currently not working is 'gcc'. I still need to
implement support for it in lib/ProfileData.

The changes in the sample profile support classes are needed for the
merge operation.

Reviewers: bogner

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D6065

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221032 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Diego Novillo
2014-11-01 00:56:55 +00:00
parent e542d91ee5
commit 9657de5f22
9 changed files with 323 additions and 123 deletions
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66
lib/ProfileData/SampleProfWriter.cpp
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@ -30,19 +30,16 @@ using namespace llvm::sampleprof;
using namespace llvm;
/// \brief Write samples to a text file.
bool SampleProfileWriterText::write(const Function &F,
const FunctionSamples &S) {
bool SampleProfileWriterText::write(StringRef FName, const FunctionSamples &S) {
if (S.empty())
return true;
OS << F.getName() << ":" << S.getTotalSamples() << ":" << S.getHeadSamples()
OS << FName << ":" << S.getTotalSamples() << ":" << S.getHeadSamples()
<< "\n";
for (BodySampleMap::const_iterator I = S.getBodySamples().begin(),
E = S.getBodySamples().end();
I != E; ++I) {
LineLocation Loc = I->first;
SampleRecord Sample = I->second;
for (const auto &I : S.getBodySamples()) {
LineLocation Loc = I.first;
const SampleRecord &Sample = I.second;
if (Loc.Discriminator == 0)
OS << Loc.LineOffset << ": ";
else
@ -50,11 +47,8 @@ bool SampleProfileWriterText::write(const Function &F,
OS << Sample.getSamples();
for (SampleRecord::CallTargetList::const_iterator
I = Sample.getCallTargets().begin(),
E = Sample.getCallTargets().end();
I != E; ++I)
OS << " " << (*I).first << ":" << (*I).second;
for (const auto &J : Sample.getCallTargets())
OS << " " << J.first() << ":" << J.second;
OS << "\n";
}
@ -75,31 +69,26 @@ SampleProfileWriterBinary::SampleProfileWriterBinary(StringRef F,
/// \brief Write samples to a binary file.
///
/// \returns true if the samples were written successfully, false otherwise.
bool SampleProfileWriterBinary::write(const Function &F,
bool SampleProfileWriterBinary::write(StringRef FName,
const FunctionSamples &S) {
if (S.empty())
return true;
OS << F.getName();
OS << FName;
encodeULEB128(0, OS);
encodeULEB128(S.getTotalSamples(), OS);
encodeULEB128(S.getHeadSamples(), OS);
encodeULEB128(S.getBodySamples().size(), OS);
for (BodySampleMap::const_iterator I = S.getBodySamples().begin(),
E = S.getBodySamples().end();
I != E; ++I) {
LineLocation Loc = I->first;
SampleRecord Sample = I->second;
for (const auto &I : S.getBodySamples()) {
LineLocation Loc = I.first;
const SampleRecord &Sample = I.second;
encodeULEB128(Loc.LineOffset, OS);
encodeULEB128(Loc.Discriminator, OS);
encodeULEB128(Sample.getSamples(), OS);
encodeULEB128(Sample.getCallTargets().size(), OS);
for (SampleRecord::CallTargetList::const_iterator
I = Sample.getCallTargets().begin(),
E = Sample.getCallTargets().end();
I != E; ++I) {
std::string Callee = (*I).first;
unsigned CalleeSamples = (*I).second;
for (const auto &J : Sample.getCallTargets()) {
std::string Callee = J.first();
unsigned CalleeSamples = J.second;
OS << Callee;
encodeULEB128(0, OS);
encodeULEB128(CalleeSamples, OS);
@ -108,3 +97,28 @@ bool SampleProfileWriterBinary::write(const Function &F,
return true;
}
/// \brief Create a sample profile writer based on the specified format.
///
/// \param Filename The file to create.
///
/// \param Writer The writer to instantiate according to the specified format.
///
/// \param Format Encoding format for the profile file.
///
/// \returns an error code indicating the status of the created writer.
std::error_code
SampleProfileWriter::create(StringRef Filename,
std::unique_ptr<SampleProfileWriter> &Writer,
SampleProfileFormat Format) {
std::error_code EC;
if (Format == SPF_Binary)
Writer.reset(new SampleProfileWriterBinary(Filename, EC));
else if (Format == SPF_Text)
Writer.reset(new SampleProfileWriterText(Filename, EC));
else
EC = sampleprof_error::unrecognized_format;
return EC;
}