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//===--------------------- BackendPrinter.cpp -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file implements the BackendPrinter interface.
///
//===----------------------------------------------------------------------===//
#include "BackendPrinter.h"
#include "llvm/CodeGen/TargetSchedule.h"
namespace mca {
using namespace llvm;
std::unique_ptr<ToolOutputFile>
BackendPrinter::getOutputStream(std::string OutputFile) {
if (OutputFile == "")
OutputFile = "-";
std::error_code EC;
auto Out = llvm::make_unique<ToolOutputFile>(OutputFile, EC, sys::fs::F_None);
if (!EC)
return Out;
errs() << EC.message() << '\n';
return nullptr;
}
void BackendPrinter::printGeneralStatistics(unsigned Iterations,
unsigned Cycles,
unsigned Instructions,
unsigned DispatchWidth) const {
unsigned TotalInstructions = Instructions * Iterations;
double IPC = (double)TotalInstructions / Cycles;
std::string Buffer;
raw_string_ostream TempStream(Buffer);
TempStream << "Iterations: " << Iterations;
TempStream << "\nInstructions: " << TotalInstructions;
TempStream << "\nTotal Cycles: " << Cycles;
TempStream << "\nDispatch Width: " << DispatchWidth;
TempStream << "\nIPC: " << format("%.2f", IPC) << '\n';
TempStream.flush();
File->os() << Buffer;
}
void BackendPrinter::printRATStatistics(unsigned TotalMappings,
unsigned MaxUsedMappings) const {
std::string Buffer;
raw_string_ostream TempStream(Buffer);
TempStream << "\n\nRegister Alias Table:";
TempStream << "\nTotal number of mappings created: " << TotalMappings;
TempStream << "\nMax number of mappings used: " << MaxUsedMappings
<< '\n';
TempStream.flush();
File->os() << Buffer;
}
void BackendPrinter::printDispatchStalls(unsigned RATStalls, unsigned RCUStalls,
unsigned SCHEDQStalls,
unsigned LDQStalls, unsigned STQStalls,
unsigned DGStalls) const {
std::string Buffer;
raw_string_ostream TempStream(Buffer);
TempStream << "\n\nDynamic Dispatch Stall Cycles:\n";
TempStream << "RAT - Register unavailable: "
<< RATStalls;
TempStream << "\nRCU - Retire tokens unavailable: "
<< RCUStalls;
TempStream << "\nSCHEDQ - Scheduler full: "
<< SCHEDQStalls;
TempStream << "\nLQ - Load queue full: "
<< LDQStalls;
TempStream << "\nSQ - Store queue full: "
<< STQStalls;
TempStream << "\nGROUP - Static restrictions on the dispatch group: "
<< DGStalls;
TempStream << '\n';
TempStream.flush();
File->os() << Buffer;
}
void BackendPrinter::printSchedulerUsage(
const MCSchedModel &SM, const ArrayRef<BufferUsageEntry> &Usage) const {
std::string Buffer;
raw_string_ostream TempStream(Buffer);
TempStream << "\n\nScheduler's queue usage:\n";
const ArrayRef<uint64_t> ResourceMasks = B.getProcResourceMasks();
for (unsigned I = 0, E = SM.getNumProcResourceKinds(); I < E; ++I) {
const MCProcResourceDesc &ProcResource = *SM.getProcResource(I);
if (!ProcResource.BufferSize)
continue;
for (const BufferUsageEntry &Entry : Usage)
if (ResourceMasks[I] == Entry.first)
TempStream << ProcResource.Name << ", " << Entry.second << '/'
<< ProcResource.BufferSize << '\n';
}
TempStream.flush();
File->os() << Buffer;
}
void BackendPrinter::printInstructionInfo() const {
std::string Buffer;
raw_string_ostream TempStream(Buffer);
TempStream << "\n\nInstruction Info:\n";
TempStream << "[1]: #uOps\n[2]: Latency\n[3]: RThroughput\n"
<< "[4]: MayLoad\n[5]: MayStore\n[6]: HasSideEffects\n\n";
TempStream << "[1] [2] [3] [4] [5] [6]\tInstructions:\n";
for (unsigned I = 0, E = B.getNumInstructions(); I < E; ++I) {
const MCInst &Inst = B.getMCInstFromIndex(I);
const InstrDesc &ID = B.getInstrDesc(Inst);
unsigned NumMicroOpcodes = ID.NumMicroOps;
unsigned Latency = ID.MaxLatency;
double RThroughput = B.getRThroughput(ID);
TempStream << ' ' << NumMicroOpcodes << " ";
if (NumMicroOpcodes < 10)
TempStream << " ";
else if (NumMicroOpcodes < 100)
TempStream << ' ';
TempStream << Latency << " ";
if (Latency < 10.0)
TempStream << " ";
else if (Latency < 100.0)
TempStream << ' ';
if (RThroughput) {
TempStream << format("%.2f", RThroughput) << ' ';
if (RThroughput < 10.0)
TempStream << " ";
else if (RThroughput < 100.0)
TempStream << ' ';
} else {
TempStream << " - ";
}
TempStream << (ID.MayLoad ? " * " : " ");
TempStream << (ID.MayStore ? " * " : " ");
TempStream << (ID.HasSideEffects ? " * " : " ");
MCIP->printInst(&Inst, TempStream, "", B.getSTI());
TempStream << '\n';
}
TempStream.flush();
File->os() << Buffer;
}
void BackendPrinter::printReport() const {
assert(isFileValid());
unsigned Cycles = B.getNumCycles();
printGeneralStatistics(B.getNumIterations(), Cycles, B.getNumInstructions(),
B.getDispatchWidth());
if (EnableVerboseOutput) {
printDispatchStalls(B.getNumRATStalls(), B.getNumRCUStalls(),
B.getNumSQStalls(), B.getNumLDQStalls(),
B.getNumSTQStalls(), B.getNumDispatchGroupStalls());
printRATStatistics(B.getTotalRegisterMappingsCreated(),
B.getMaxUsedRegisterMappings());
BS->printHistograms(File->os());
std::vector<BufferUsageEntry> Usage;
B.getBuffersUsage(Usage);
printSchedulerUsage(B.getSchedModel(), Usage);
}
if (RPV) {
RPV->printResourcePressure(getOStream(), Cycles);
printInstructionInfo();
}
if (TV) {
TV->printTimeline(getOStream());
TV->printAverageWaitTimes(getOStream());
}
}
void BackendPrinter::addResourcePressureView() {
if (!RPV) {
RPV = llvm::make_unique<ResourcePressureView>(
B.getSTI(), *MCIP, B.getSourceMgr(), B.getProcResourceMasks());
B.addEventListener(RPV.get());
}
}
void BackendPrinter::addTimelineView(unsigned MaxIterations,
unsigned MaxCycles) {
if (!TV) {
TV = llvm::make_unique<TimelineView>(B.getSTI(), *MCIP, B.getSourceMgr(),
MaxIterations, MaxCycles);
B.addEventListener(TV.get());
}
}
void BackendPrinter::initialize(std::string OutputFileName) {
File = getOutputStream(OutputFileName);
MCIP->setPrintImmHex(false);
if (EnableVerboseOutput) {
BS = llvm::make_unique<BackendStatistics>();
B.addEventListener(BS.get());
}
}
} // namespace mca.
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