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//===--------------------- InstrBuilder.h -----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// A builder class for instructions that are statically analyzed by llvm-mca.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_MCA_INSTRBUILDER_H
#define LLVM_TOOLS_LLVM_MCA_INSTRBUILDER_H
#include "Instruction.h"
#include "Support.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
namespace mca {
class DispatchUnit;
/// \brief A builder class that knows how to construct Instruction objects.
///
/// Every llvm-mca Instruction is described by an object of class InstrDesc.
/// An InstrDesc describes which registers are read/written by the instruction,
/// as well as the instruction latency and hardware resources consumed.
///
/// This class is used by the tool to construct Instructions and instruction
/// descriptors (i.e. InstrDesc objects).
/// Information from the machine scheduling model is used to identify processor
/// resources that are consumed by an instruction.
class InstrBuilder {
const llvm::MCSubtargetInfo &STI;
const llvm::MCInstrInfo &MCII;
llvm::SmallVector<uint64_t, 8> ProcResourceMasks;
llvm::DenseMap<unsigned short, std::unique_ptr<const InstrDesc>> Descriptors;
void createInstrDescImpl(const llvm::MCInst &MCI);
public:
InstrBuilder(const llvm::MCSubtargetInfo &sti, const llvm::MCInstrInfo &mcii)
: STI(sti), MCII(mcii),
ProcResourceMasks(STI.getSchedModel().getNumProcResourceKinds()) {
computeProcResourceMasks(STI.getSchedModel(), ProcResourceMasks);
}
const InstrDesc &getOrCreateInstrDesc(const llvm::MCInst &MCI);
std::unique_ptr<Instruction> createInstruction(unsigned Idx,
const llvm::MCInst &MCI);
};
} // namespace mca
#endif
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