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📁 ..
📁 AsmParser
📁 Disassembler
📁 MCTargetDesc
📄 README.txt(3.94 KB)
📄 SystemZ.h(8.19 KB)
📄 SystemZ.td(2.86 KB)
📄 SystemZAsmPrinter.cpp(23.49 KB)
📄 SystemZAsmPrinter.h(1.88 KB)
📄 SystemZCallingConv.cpp(710 B)
📄 SystemZCallingConv.h(4.89 KB)
📄 SystemZCallingConv.td(6.99 KB)
📄 SystemZConstantPoolValue.cpp(1.78 KB)
📄 SystemZConstantPoolValue.h(1.75 KB)
📄 SystemZCopyPhysRegs.cpp(3.82 KB)
📄 SystemZElimCompare.cpp(26.21 KB)
📄 SystemZFeatures.td(12.3 KB)
📄 SystemZFrameLowering.cpp(29.88 KB)
📄 SystemZFrameLowering.h(3.02 KB)
📄 SystemZHazardRecognizer.cpp(14.75 KB)
📄 SystemZHazardRecognizer.h(5.86 KB)
📄 SystemZISelDAGToDAG.cpp(68.74 KB)
📄 SystemZISelLowering.cpp(321.22 KB)
📄 SystemZISelLowering.h(28.44 KB)
📄 SystemZInstrBuilder.h(1.63 KB)
📄 SystemZInstrDFP.td(9.3 KB)
📄 SystemZInstrFP.td(26.21 KB)
📄 SystemZInstrFormats.td(182.82 KB)
📄 SystemZInstrHFP.td(9.46 KB)
📄 SystemZInstrInfo.cpp(69.75 KB)
📄 SystemZInstrInfo.h(14.6 KB)
📄 SystemZInstrInfo.td(103.17 KB)
📄 SystemZInstrSystem.td(17.18 KB)
📄 SystemZInstrVector.td(84.36 KB)
📄 SystemZLDCleanup.cpp(4.91 KB)
📄 SystemZLongBranch.cpp(16.04 KB)
📄 SystemZMCInstLower.cpp(3.16 KB)
📄 SystemZMCInstLower.h(1.28 KB)
📄 SystemZMachineFunctionInfo.cpp(508 B)
📄 SystemZMachineFunctionInfo.h(3.77 KB)
📄 SystemZMachineScheduler.cpp(8.76 KB)
📄 SystemZMachineScheduler.h(5.05 KB)
📄 SystemZOperands.td(24.89 KB)
📄 SystemZOperators.td(48.97 KB)
📄 SystemZPatterns.td(8.52 KB)
📄 SystemZPostRewrite.cpp(10.33 KB)
📄 SystemZProcessors.td(1.78 KB)
📄 SystemZRegisterInfo.cpp(16.27 KB)
📄 SystemZRegisterInfo.h(3.52 KB)
📄 SystemZRegisterInfo.td(12.04 KB)
📄 SystemZSchedule.td(2.1 KB)
📄 SystemZScheduleZ13.td(72.43 KB)
📄 SystemZScheduleZ14.td(78.06 KB)
📄 SystemZScheduleZ15.td(80.69 KB)
📄 SystemZScheduleZ196.td(55.68 KB)
📄 SystemZScheduleZEC12.td(57.44 KB)
📄 SystemZSelectionDAGInfo.cpp(12.92 KB)
📄 SystemZSelectionDAGInfo.h(3.15 KB)
📄 SystemZShortenInst.cpp(12 KB)
📄 SystemZSubtarget.cpp(3.67 KB)
📄 SystemZSubtarget.h(9.14 KB)
📄 SystemZTDC.cpp(13.52 KB)
📄 SystemZTargetMachine.cpp(11.58 KB)
📄 SystemZTargetMachine.h(2.09 KB)
📄 SystemZTargetTransformInfo.cpp(43.51 KB)
📄 SystemZTargetTransformInfo.h(4.88 KB)
📁 TargetInfo

Editing: SystemZMachineScheduler.h

//==- SystemZMachineScheduler.h - SystemZ Scheduler Interface ----*- 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
//
//===----------------------------------------------------------------------===//
//
// -------------------------- Post RA scheduling ---------------------------- //
// SystemZPostRASchedStrategy is a scheduling strategy which is plugged into
// the MachineScheduler. It has a sorted Available set of SUs and a pickNode()
// implementation that looks to optimize decoder grouping and balance the
// usage of processor resources. Scheduler states are saved for the end
// region of each MBB, so that a successor block can learn from it.
//===----------------------------------------------------------------------===//

#include "SystemZHazardRecognizer.h"
#include "llvm/CodeGen/MachineScheduler.h"
#include "llvm/CodeGen/ScheduleDAG.h"
#include <set>

#ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H
#define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H

using namespace llvm;

namespace llvm {

/// A MachineSchedStrategy implementation for SystemZ post RA scheduling.
class SystemZPostRASchedStrategy : public MachineSchedStrategy {

const MachineLoopInfo *MLI;
  const SystemZInstrInfo *TII;

// A SchedModel is needed before any DAG is built while advancing past
  // non-scheduled instructions, so it would not always be possible to call
  // DAG->getSchedClass(SU).
  TargetSchedModel SchedModel;

/// A candidate during instruction evaluation.
  struct Candidate {
    SUnit *SU = nullptr;

/// The decoding cost.
    int GroupingCost = 0;

/// The processor resources cost.
    int ResourcesCost = 0;

Candidate() = default;
    Candidate(SUnit *SU_, SystemZHazardRecognizer &HazardRec);

// Compare two candidates.
    bool operator<(const Candidate &other);

// Check if this node is free of cost ("as good as any").
    bool noCost() const {
      return (GroupingCost <= 0 && !ResourcesCost);
    }

#ifndef NDEBUG
    void dumpCosts() {
      if (GroupingCost != 0)
        dbgs() << "  Grouping cost:" << GroupingCost;
      if (ResourcesCost != 0)
        dbgs() << "  Resource cost:" << ResourcesCost;
    }
#endif
  };

// A sorter for the Available set that makes sure that SUs are considered
  // in the best order.
  struct SUSorter {
    bool operator() (SUnit *lhs, SUnit *rhs) const {
      if (lhs->isScheduleHigh && !rhs->isScheduleHigh)
        return true;
      if (!lhs->isScheduleHigh && rhs->isScheduleHigh)
        return false;

if (lhs->getHeight() > rhs->getHeight())
        return true;
      else if (lhs->getHeight() < rhs->getHeight())
        return false;

return (lhs->NodeNum < rhs->NodeNum);
    }
  };
  // A set of SUs with a sorter and dump method.
  struct SUSet : std::set<SUnit*, SUSorter> {
    #ifndef NDEBUG
    void dump(SystemZHazardRecognizer &HazardRec) const;
    #endif
  };

/// The set of available SUs to schedule next.
  SUSet Available;

/// Current MBB
  MachineBasicBlock *MBB;

/// Maintain hazard recognizers for all blocks, so that the scheduler state
  /// can be maintained past BB boundaries when appropariate.
  typedef std::map<MachineBasicBlock*, SystemZHazardRecognizer*> MBB2HazRec;
  MBB2HazRec SchedStates;

/// Pointer to the HazardRecognizer that tracks the scheduler state for
  /// the current region.
  SystemZHazardRecognizer *HazardRec;

/// Update the scheduler state by emitting (non-scheduled) instructions
  /// up to, but not including, NextBegin.
  void advanceTo(MachineBasicBlock::iterator NextBegin);

public:
  SystemZPostRASchedStrategy(const MachineSchedContext *C);
  virtual ~SystemZPostRASchedStrategy();

/// Called for a region before scheduling.
  void initPolicy(MachineBasicBlock::iterator Begin,
                  MachineBasicBlock::iterator End,
                  unsigned NumRegionInstrs) override;

/// PostRA scheduling does not track pressure.
  bool shouldTrackPressure() const override { return false; }

// Process scheduling regions top-down so that scheduler states can be
  // transferrred over scheduling boundaries.
  bool doMBBSchedRegionsTopDown() const override { return true; }

void initialize(ScheduleDAGMI *dag) override;

/// Tell the strategy that MBB is about to be processed.
  void enterMBB(MachineBasicBlock *NextMBB) override;

/// Tell the strategy that current MBB is done.
  void leaveMBB() override;

/// Pick the next node to schedule, or return NULL.
  SUnit *pickNode(bool &IsTopNode) override;

/// ScheduleDAGMI has scheduled an instruction - tell HazardRec
  /// about it.
  void schedNode(SUnit *SU, bool IsTopNode) override;

/// SU has had all predecessor dependencies resolved. Put it into
  /// Available.
  void releaseTopNode(SUnit *SU) override;

/// Currently only scheduling top-down, so this method is empty.
  void releaseBottomNode(SUnit *SU) override {};
};

} // end namespace llvm

#endif // LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZMACHINESCHEDULER_H

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Editing: SystemZMachineScheduler.h

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