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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
//===--------------------- InstrBuilder.h -----------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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///
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/// A builder class for instructions that are statically analyzed by llvm-mca.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MCA_INSTRBUILDER_H
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#define LLVM_MCA_INSTRBUILDER_H
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#include "llvm/MC/MCInstrAnalysis.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCRegisterInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MCA/Instruction.h"
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#include "llvm/MCA/Support.h"
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#include "llvm/Support/Error.h"
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namespace llvm {
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namespace mca {
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/// A builder class that knows how to construct Instruction objects.
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///
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/// Every llvm-mca Instruction is described by an object of class InstrDesc.
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/// An InstrDesc describes which registers are read/written by the instruction,
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/// as well as the instruction latency and hardware resources consumed.
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///
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/// This class is used by the tool to construct Instructions and instruction
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/// descriptors (i.e. InstrDesc objects).
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/// Information from the machine scheduling model is used to identify processor
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/// resources that are consumed by an instruction.
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class InstrBuilder {
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const MCSubtargetInfo &STI;
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const MCInstrInfo &MCII;
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const MCRegisterInfo &MRI;
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const MCInstrAnalysis *MCIA;
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SmallVector<uint64_t, 8> ProcResourceMasks;
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DenseMap<unsigned short, std::unique_ptr<const InstrDesc>> Descriptors;
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DenseMap<const MCInst *, std::unique_ptr<const InstrDesc>> VariantDescriptors;
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bool FirstCallInst;
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bool FirstReturnInst;
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Expected<const InstrDesc &> createInstrDescImpl(const MCInst &MCI);
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Expected<const InstrDesc &> getOrCreateInstrDesc(const MCInst &MCI);
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InstrBuilder(const InstrBuilder &) = delete;
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InstrBuilder &operator=(const InstrBuilder &) = delete;
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void populateWrites(InstrDesc &ID, const MCInst &MCI, unsigned SchedClassID);
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void populateReads(InstrDesc &ID, const MCInst &MCI, unsigned SchedClassID);
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Error verifyInstrDesc(const InstrDesc &ID, const MCInst &MCI) const;
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public:
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InstrBuilder(const MCSubtargetInfo &STI, const MCInstrInfo &MCII,
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const MCRegisterInfo &RI, const MCInstrAnalysis *IA);
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void clear() {
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VariantDescriptors.shrink_and_clear();
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FirstCallInst = true;
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FirstReturnInst = true;
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}
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Expected<std::unique_ptr<Instruction>> createInstruction(const MCInst &MCI);
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};
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} // namespace mca
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} // namespace llvm
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#endif // LLVM_MCA_INSTRBUILDER_H
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