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//=-- InstrProfWriter.cpp - Instrumented profiling writer -------------------=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for writing profiling data for clang's
// instrumentation based PGO and coverage.
//
//===----------------------------------------------------------------------===//
#include "llvm/ProfileData/InstrProfWriter.h"
#include "llvm/Support/Endian.h"
using namespace llvm;
error_code InstrProfWriter::addFunctionCounts(StringRef FunctionName,
uint64_t FunctionHash,
ArrayRef<uint64_t> Counters) {
auto Where = FunctionData.find(FunctionName);
if (Where == FunctionData.end()) {
// If this is the first time we've seen this function, just add it.
FunctionData[FunctionName] = {FunctionHash, Counters};
return instrprof_error::success;;
}
auto &Data = Where->getValue();
// We can only add to existing functions if they match, so we check the hash
// and number of counters.
if (Data.Hash != FunctionHash)
return instrprof_error::hash_mismatch;
if (Data.Counts.size() != Counters.size())
return instrprof_error::count_mismatch;
// These match, add up the counters.
for (size_t I = 0, E = Counters.size(); I < E; ++I) {
if (Data.Counts[I] + Counters[I] < Data.Counts[I])
return instrprof_error::counter_overflow;
Data.Counts[I] += Counters[I];
}
return instrprof_error::success;
}
void InstrProfWriter::write(raw_ostream &OS) {
// Write out the counts for each function.
for (const auto &I : FunctionData) {
StringRef Name = I.getKey();
uint64_t Hash = I.getValue().Hash;
const std::vector<uint64_t> &Counts = I.getValue().Counts;
OS << Name << "\n" << Hash << "\n" << Counts.size() << "\n";
for (uint64_t Count : Counts)
OS << Count << "\n";
OS << "\n";
}
}
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