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//===--------------------- SummaryView.h ---------------------*- 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 summary view.
///
/// The goal of the summary view is to give a very quick overview of the
/// performance throughput. Below is an example of summary view:
///
///
/// Iterations: 300
/// Instructions: 900
/// Total Cycles: 610
/// Dispatch Width: 2
/// IPC: 1.48
///
///
/// Instruction Info:
/// [1]: #uOps
/// [2]: Latency
/// [3]: RThroughput
/// [4]: MayLoad
/// [5]: MayStore
/// [6]: HasSideEffects
///
/// [1] [2] [3] [4] [5] [6] Instructions:
/// 1 2 1.00 vmulps %xmm0, %xmm1, %xmm2
/// 1 3 1.00 vhaddps %xmm2, %xmm2, %xmm3
/// 1 3 1.00 vhaddps %xmm3, %xmm3, %xmm4
///
/// The summary view is structured in two sections.
///
/// The first section collects a a few performance numbers. The two main
/// performance indicators are 'Total Cycles' and IPC (Instructions Per Cycle).
///
/// The second section shows the latency and reciprocal throughput of every
/// instruction in the sequence. This section also reports extra informaton
/// related to the number of micro opcodes, and opcode properties (i.e.
/// 'MayLoad', 'MayStore', 'HasSideEffects)
///
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_MCA_SUMMARYVIEW_H
#define LLVM_TOOLS_LLVM_MCA_SUMMARYVIEW_H
#include "SourceMgr.h"
#include "View.h"
#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/Support/raw_ostream.h"
#define DEBUG_TYPE "llvm-mca"
namespace mca {
/// \brief A printer class that knows how to collects statistics on the
/// code analyzed by the llvm-mca tool.
///
/// This class knows how to print out the analysis information collected
/// during the execution of the code. Internally, it delegates to other
/// classes the task of printing out timeline information as well as
/// resource pressure.
class SummaryView : public View {
const llvm::MCSubtargetInfo &STI;
const llvm::MCInstrInfo &MCII;
const SourceMgr &Source;
llvm::MCInstPrinter &MCIP;
const unsigned DispatchWidth;
unsigned TotalCycles;
void printSummary(llvm::raw_ostream &OS) const;
void printInstructionInfo(llvm::raw_ostream &OS) const;
public:
SummaryView(const llvm::MCSubtargetInfo &sti, const llvm::MCInstrInfo &mcii,
const SourceMgr &S, llvm::MCInstPrinter &IP, unsigned Width)
: STI(sti), MCII(mcii), Source(S), MCIP(IP), DispatchWidth(Width),
TotalCycles(0) {}
void onCycleEnd(unsigned /* unused */) override { ++TotalCycles; }
void printView(llvm::raw_ostream &OS) const override {
printSummary(OS);
printInstructionInfo(OS);
}
};
} // namespace mca
#endif
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