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//===-- Analysis.h ----------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// \file
/// Analysis output for benchmark results.
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_EXEGESIS_ANALYSIS_H
#define LLVM_TOOLS_LLVM_EXEGESIS_ANALYSIS_H
#include "Clustering.h"
#include "SchedClassResolution.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler/MCDisassembler.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
#include <memory>
#include <set>
#include <string>
#include <unordered_map>
namespace llvm {
namespace exegesis {
// A helper class to analyze benchmark results for a target.
class Analysis {
public:
Analysis(const Target &Target, std::unique_ptr<MCInstrInfo> InstrInfo,
const InstructionBenchmarkClustering &Clustering,
double AnalysisInconsistencyEpsilon,
bool AnalysisDisplayUnstableOpcodes);
// Prints a csv of instructions for each cluster.
struct PrintClusters {};
// Find potential errors in the scheduling information given measurements.
struct PrintSchedClassInconsistencies {};
template <typename Pass> Error run(raw_ostream &OS) const;
private:
using ClusterId = InstructionBenchmarkClustering::ClusterId;
// Represents the intersection of a sched class and a cluster.
class SchedClassCluster {
public:
const InstructionBenchmarkClustering::ClusterId &id() const {
return ClusterId;
}
const std::vector<size_t> &getPointIds() const { return PointIds; }
void addPoint(size_t PointId,
const InstructionBenchmarkClustering &Clustering);
// Return the cluster centroid.
const SchedClassClusterCentroid &getCentroid() const { return Centroid; }
// Returns true if the cluster representative measurements match that of SC.
bool
measurementsMatch(const MCSubtargetInfo &STI, const ResolvedSchedClass &SC,
const InstructionBenchmarkClustering &Clustering,
const double AnalysisInconsistencyEpsilonSquared_) const;
private:
InstructionBenchmarkClustering::ClusterId ClusterId;
std::vector<size_t> PointIds;
// Measurement stats for the points in the SchedClassCluster.
SchedClassClusterCentroid Centroid;
};
void printInstructionRowCsv(size_t PointId, raw_ostream &OS) const;
void
printSchedClassClustersHtml(const std::vector<SchedClassCluster> &Clusters,
const ResolvedSchedClass &SC,
raw_ostream &OS) const;
void printSchedClassDescHtml(const ResolvedSchedClass &SC,
raw_ostream &OS) const;
// A pair of (Sched Class, indices of points that belong to the sched
// class).
struct ResolvedSchedClassAndPoints {
explicit ResolvedSchedClassAndPoints(ResolvedSchedClass &&RSC);
ResolvedSchedClass RSC;
std::vector<size_t> PointIds;
};
// Builds a list of ResolvedSchedClassAndPoints.
std::vector<ResolvedSchedClassAndPoints> makePointsPerSchedClass() const;
template <typename EscapeTag, EscapeTag Tag>
void writeSnippet(raw_ostream &OS, ArrayRef<uint8_t> Bytes,
const char *Separator) const;
const InstructionBenchmarkClustering &Clustering_;
MCObjectFileInfo ObjectFileInfo_;
std::unique_ptr<MCContext> Context_;
std::unique_ptr<MCSubtargetInfo> SubtargetInfo_;
std::unique_ptr<MCInstrInfo> InstrInfo_;
std::unique_ptr<MCRegisterInfo> RegInfo_;
std::unique_ptr<MCAsmInfo> AsmInfo_;
std::unique_ptr<MCInstPrinter> InstPrinter_;
std::unique_ptr<MCDisassembler> Disasm_;
const double AnalysisInconsistencyEpsilonSquared_;
const bool AnalysisDisplayUnstableOpcodes_;
};
} // namespace exegesis
} // namespace llvm
#endif // LLVM_TOOLS_LLVM_EXEGESIS_CLUSTERING_H
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