//===- MacroFusion.h - Macro Fusion -----------------------------*- 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 contains the definition of the DAG scheduling mutation to /// pair instructions back to back. // //===----------------------------------------------------------------------===// #ifndef LLVM_CODEGEN_MACROFUSION_H #define LLVM_CODEGEN_MACROFUSION_H #include #include namespace llvm { class MachineInstr; class ScheduleDAGMutation; class TargetInstrInfo; class TargetSubtargetInfo; /// \brief Check if the instr pair, FirstMI and SecondMI, should be fused /// together. Given SecondMI, when FirstMI is unspecified, then check if /// SecondMI may be part of a fused pair at all. using ShouldSchedulePredTy = std::function; /// \brief Create a DAG scheduling mutation to pair instructions back to back /// for instructions that benefit according to the target-specific /// shouldScheduleAdjacent predicate function. std::unique_ptr createMacroFusionDAGMutation(ShouldSchedulePredTy shouldScheduleAdjacent); /// \brief Create a DAG scheduling mutation to pair branch instructions with one /// of their predecessors back to back for instructions that benefit according /// to the target-specific shouldScheduleAdjacent predicate function. std::unique_ptr createBranchMacroFusionDAGMutation(ShouldSchedulePredTy shouldScheduleAdjacent); } // end namespace llvm #endif // LLVM_CODEGEN_MACROFUSION_H