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