llvm/lib/Target/PowerPC/PPCMachineScheduler.h

   1 //===- PPCMachineScheduler.h - Custom PowerPC MI scheduler --*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Custom PowerPC MI scheduler.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #ifndef LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H
  14 #define LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H
  15
  16 #include "llvm/CodeGen/MachineScheduler.h"
  17
  18 namespace llvm {
  19
  20 /// A MachineSchedStrategy implementation for PowerPC pre RA scheduling.
  21 class PPCPreRASchedStrategy : public GenericScheduler {
  22 public:
  23   PPCPreRASchedStrategy(const MachineSchedContext *C) :
  24     GenericScheduler(C) {}
  25 protected:
  26   bool tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand,
  27                     SchedBoundary *Zone) const override;
  28
  29 private:
  30   bool biasAddiLoadCandidate(SchedCandidate &Cand,
  31                              SchedCandidate &TryCand,
  32                              SchedBoundary &Zone) const;
  33 };
  34
  35 /// A MachineSchedStrategy implementation for PowerPC post RA scheduling.
  36 class PPCPostRASchedStrategy : public PostGenericScheduler {
  37 public:
  38   PPCPostRASchedStrategy(const MachineSchedContext *C) :
  39     PostGenericScheduler(C) {}
  40
  41 protected:
  42   void initialize(ScheduleDAGMI *Dag) override;
  43   SUnit *pickNode(bool &IsTopNode) override;
  44   void enterMBB(MachineBasicBlock *MBB) override;
  45   void leaveMBB() override;
  46
  47   bool tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) override;
  48   bool biasAddiCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) const;
  49 };
  50
  51 } // end namespace llvm
  52
  53 #endif // LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H