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//===-- Core/PerfSupport.h - Perf measurement helpers -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file provides helper functionality for measuring performance and
/// recording data to file.
///
//===----------------------------------------------------------------------===//
#ifndef CPP11_MIGRATE_PERFSUPPORT_H
#define CPP11_MIGRATE_PERFSUPPORT_H
#include "Transform.h"
#include "llvm/ADT/StringRef.h"
#include <map>
#include <vector>
/// \brief A single piece of performance data: a duration in milliseconds and a
/// label for that duration.
struct PerfItem {
PerfItem(const llvm::StringRef Label, float Duration)
: Label(Label), Duration(Duration) {}
/// Label for this performance measurement.
std::string Label;
/// Duration in milliseconds.
float Duration;
};
/// Maps source file names to a vector of durations/labels.
typedef std::map<std::string, std::vector<PerfItem> > SourcePerfData;
/// Extracts durations collected by a Transform for all sources and adds them
/// to a SourcePerfData map where data is organized by source file.
extern void collectSourcePerfData(const Transform &T, SourcePerfData &Data);
/// Write timing results to a JSON formatted file.
///
/// File is placed in the directory given by \p DirectoryName. File is named in
/// a unique way with time and process ID to avoid naming collisions with
/// existing files or files being generated by other migrator processes.
void writePerfDataJSON(
const llvm::StringRef DirectoryName,
const SourcePerfData &TimingResults);
/// Dump a SourcePerfData map to llvm::errs().
extern void dumpPerfData(const SourcePerfData &Data);
#endif // CPP11_MIGRATE_PERFSUPPORT_H
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