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//===-- Analysis.cpp --------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Analysis.h"
#include "BenchmarkResult.h"
#include "llvm/Support/FormatVariadic.h"
#include <vector>
namespace exegesis {
static const char kCsvSep = ',';
static void writeCsvEscaped(llvm::raw_ostream &OS, const std::string &S) {
if (std::find(S.begin(), S.end(), kCsvSep) == S.end()) {
OS << S;
} else {
// Needs escaping.
OS << '"';
for (const char C : S) {
if (C == '"')
OS << "\"\"";
else
OS << C;
}
OS << '"';
}
}
// Prints a row representing an instruction, along with scheduling info and
// point coordinates (measurements).
static void printInstructionRow(const InstructionBenchmark &Point,
const llvm::MCSubtargetInfo &STI,
const size_t ClusterId, llvm::raw_ostream &OS) {
OS << ClusterId << kCsvSep;
writeCsvEscaped(OS, Point.Key.OpcodeName);
OS << kCsvSep;
writeCsvEscaped(OS, Point.Key.Config);
// FIXME: Print the sched class once InstructionBenchmark separates key into
// (mnemonic, mode, opaque).
for (const auto &Measurement : Point.Measurements) {
OS << kCsvSep;
writeCsvEscaped(OS, llvm::formatv("{0:F}", Measurement.Value));
}
OS << "\n";
}
static void printCluster(const std::vector<InstructionBenchmark> &Points,
const llvm::MCSubtargetInfo &STI,
const size_t ClusterId,
const InstructionBenchmarkClustering::Cluster &Cluster,
llvm::raw_ostream &OS) {
// Print all points.
for (const auto &PointId : Cluster.PointIndices) {
printInstructionRow(Points[PointId], STI, ClusterId, OS);
}
}
llvm::Error
printAnalysisClusters(const InstructionBenchmarkClustering &Clustering,
const llvm::MCSubtargetInfo &STI, llvm::raw_ostream &OS) {
if (Clustering.getPoints().empty())
return llvm::Error::success();
// Write the header.
OS << "cluster_id" << kCsvSep << "opcode_name" << kCsvSep << "config"
<< kCsvSep << "sched_class";
for (const auto &Measurement : Clustering.getPoints().front().Measurements) {
OS << kCsvSep;
writeCsvEscaped(OS, Measurement.Key);
}
OS << "\n";
// Write the points.
for (size_t I = 0, E = Clustering.getValidClusters().size(); I < E; ++I) {
printCluster(Clustering.getPoints(), STI, I,
Clustering.getValidClusters()[I], OS);
OS << "\n\n";
}
return llvm::Error::success();
}
} // namespace exegesis
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