| //===---------------------- EntryStage.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 defines the Entry stage of an instruction pipeline. Its sole |
| /// purpose in life is to pick instructions in sequence and move them to the |
| /// next pipeline stage. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MCA_ENTRY_STAGE_H |
| #define LLVM_MCA_ENTRY_STAGE_H |
| |
| #include "llvm/ADT/SmallVector.h" |
| #include "llvm/MCA/SourceMgr.h" |
| #include "llvm/MCA/Stages/Stage.h" |
| |
| namespace llvm { |
| namespace mca { |
| |
| class EntryStage final : public Stage { |
| InstRef CurrentInstruction; |
| SmallVector<std::unique_ptr<Instruction>, 16> Instructions; |
| SourceMgr &SM; |
| unsigned NumRetired; |
| |
| // Updates the program counter, and sets 'CurrentInstruction'. |
| void getNextInstruction(); |
| |
| EntryStage(const EntryStage &Other) = delete; |
| EntryStage &operator=(const EntryStage &Other) = delete; |
| |
| public: |
| EntryStage(SourceMgr &SM) : CurrentInstruction(), SM(SM), NumRetired(0) { } |
| |
| bool isAvailable(const InstRef &IR) const override; |
| bool hasWorkToComplete() const override; |
| Error execute(InstRef &IR) override; |
| Error cycleStart() override; |
| Error cycleEnd() override; |
| }; |
| |
| } // namespace mca |
| } // namespace llvm |
| |
| #endif // LLVM_MCA_FETCH_STAGE_H |