llvm-6502/include/llvm/ProfileData/InstrProfWriter.h
Justin Bogner e153fb33e4 ProfileData: Add support for the indexed instrprof format
This adds support for an indexed instrumentation based profiling
format, which is just a small header and an on disk hash table.  This
format will be used by clang's -fprofile-instr-use= for PGO.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206656 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-18 21:48:40 +00:00

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1.5 KiB
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//=-- InstrProfWriter.h - Instrumented profiling writer -----------*- C++ -*-=//
//
// 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 instrumentation
// based PGO and coverage.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_PROFILEDATA_INSTRPROF_WRITER_H_
#define LLVM_PROFILEDATA_INSTRPROF_WRITER_H_
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/raw_ostream.h"
#include <vector>
namespace llvm {
/// Writer for instrumentation based profile data.
class InstrProfWriter {
public:
struct CounterData {
uint64_t Hash;
std::vector<uint64_t> Counts;
};
private:
StringMap<CounterData> FunctionData;
public:
/// Add function counts for the given function. If there are already counts
/// for this function and the hash and number of counts match, each counter is
/// summed.
error_code addFunctionCounts(StringRef FunctionName, uint64_t FunctionHash,
ArrayRef<uint64_t> Counters);
/// Ensure that all data is written to disk.
void write(raw_fd_ostream &OS);
};
} // end namespace llvm
#endif // LLVM_PROFILE_INSTRPROF_WRITER_H_