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      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   void tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand,
     27                     SchedBoundary *Zone) const override;
     28 private:
     29   bool biasAddiLoadCandidate(SchedCandidate &Cand,
     30                              SchedCandidate &TryCand,
     31                              SchedBoundary &Zone) const;
     32 };
     33 
     34 /// A MachineSchedStrategy implementation for PowerPC post RA scheduling.
     35 class PPCPostRASchedStrategy : public PostGenericScheduler {
     36 public:
     37   PPCPostRASchedStrategy(const MachineSchedContext *C) :
     38     PostGenericScheduler(C) {}
     39 
     40 protected:
     41   void initialize(ScheduleDAGMI *Dag) override;
     42   SUnit *pickNode(bool &IsTopNode) override;
     43   void enterMBB(MachineBasicBlock *MBB) override;
     44   void leaveMBB() override;
     45 
     46   void tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) override;
     47   bool biasAddiCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) const;
     48 };
     49 
     50 } // end namespace llvm
     51 
     52 #endif // LLVM_LIB_TARGET_POWERPC_POWERPCMACHINESCHEDULER_H
     53