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//===-- BenchmarkRunner.cpp -------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "BenchmarkRunner.h"
#include "InMemoryAssembler.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include <string>
namespace exegesis {
BenchmarkRunner::InstructionFilter::~InstructionFilter() = default;
BenchmarkRunner::~BenchmarkRunner() = default;
InstructionBenchmark
BenchmarkRunner::run(const LLVMState &State, const unsigned Opcode,
unsigned NumRepetitions,
const InstructionFilter &Filter) const {
InstructionBenchmark InstrBenchmark;
InstrBenchmark.Key.OpcodeName = State.getInstrInfo().getName(Opcode);
InstrBenchmark.Key.Mode = getDisplayName();
InstrBenchmark.CpuName = State.getCpuName();
InstrBenchmark.LLVMTriple = State.getTriple();
InstrBenchmark.NumRepetitions = NumRepetitions;
// Ignore instructions that we cannot run.
if (State.getInstrInfo().get(Opcode).isPseudo()) {
InstrBenchmark.Error = "Unsupported opcode: isPseudo";
return InstrBenchmark;
}
if (llvm::Error E = Filter.shouldRun(State, Opcode)) {
InstrBenchmark.Error = llvm::toString(std::move(E));
return InstrBenchmark;
}
JitFunctionContext Context(State.createTargetMachine());
auto ExpectedInstructions =
createCode(State, Opcode, NumRepetitions, Context);
if (llvm::Error E = ExpectedInstructions.takeError()) {
InstrBenchmark.Error = llvm::toString(std::move(E));
return InstrBenchmark;
}
const std::vector<llvm::MCInst> Instructions = *ExpectedInstructions;
const JitFunction Function(std::move(Context), Instructions);
const llvm::StringRef CodeBytes = Function.getFunctionBytes();
std::string AsmExcerpt;
constexpr const int ExcerptSize = 100;
constexpr const int ExcerptTailSize = 10;
if (CodeBytes.size() <= ExcerptSize) {
AsmExcerpt = llvm::toHex(CodeBytes);
} else {
AsmExcerpt =
llvm::toHex(CodeBytes.take_front(ExcerptSize - ExcerptTailSize + 3));
AsmExcerpt += "...";
AsmExcerpt += llvm::toHex(CodeBytes.take_back(ExcerptTailSize));
}
llvm::outs() << "# Asm excerpt: " << AsmExcerpt << "\n";
llvm::outs().flush(); // In case we crash.
InstrBenchmark.Measurements =
runMeasurements(State, Function, NumRepetitions);
return InstrBenchmark;
}
} // namespace exegesis
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