| //===- llvm/CodeGen/GlobalISel/InstructionSelector.h ------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| /// \file This file declares the API for the instruction selector. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECTOR_H |
| #define LLVM_CODEGEN_GLOBALISEL_INSTRUCTIONSELECTOR_H |
| |
| #include "llvm/CodeGen/GlobalISel/GIMatchTableExecutor.h" |
| |
| namespace llvm { |
| class InstructionSelector : public GIMatchTableExecutor { |
| public: |
| virtual ~InstructionSelector(); |
| |
| /// Select the (possibly generic) instruction \p I to only use target-specific |
| /// opcodes. It is OK to insert multiple instructions, but they cannot be |
| /// generic pre-isel instructions. |
| /// |
| /// \returns whether selection succeeded. |
| /// \pre I.getParent() && I.getParent()->getParent() |
| /// \post |
| /// if returns true: |
| /// for I in all mutated/inserted instructions: |
| /// !isPreISelGenericOpcode(I.getOpcode()) |
| virtual bool select(MachineInstr &I) = 0; |
| }; |
| } // namespace llvm |
| |
| #endif |