mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-10-11 23:25:15 +00:00
79ce276083
and into the ScheduleDAGInstrs class, so that they don't get destructed and re-constructed for each block. This fixes a compile-time hot spot in the post-pass scheduler. To help facilitate this, tidy and do some minor reorganization in the scheduler constructor functions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62275 91177308-0d34-0410-b5e6-96231b3b80d8
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//==- llvm/CodeGen/ScheduleDAGInstrs.h - MachineInstr Scheduling -*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the ScheduleDAGInstrs class, which implements
|
|
// scheduling for a MachineInstr-based dependency graph.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
|
|
#define LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
|
|
|
|
#include "llvm/CodeGen/ScheduleDAG.h"
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
|
|
|
namespace llvm {
|
|
class MachineLoopInfo;
|
|
class MachineDominatorTree;
|
|
|
|
class ScheduleDAGInstrs : public ScheduleDAG {
|
|
const MachineLoopInfo &MLI;
|
|
const MachineDominatorTree &MDT;
|
|
|
|
/// Defs, Uses - Remember where defs and uses of each physical register
|
|
/// are as we iterate upward through the instructions. This is allocated
|
|
/// here instead of inside BuildSchedGraph to avoid the need for it to be
|
|
/// initialized and destructed for each block.
|
|
std::vector<SUnit *> Defs[TargetRegisterInfo::FirstVirtualRegister];
|
|
std::vector<SUnit *> Uses[TargetRegisterInfo::FirstVirtualRegister];
|
|
|
|
/// PendingLoads - Remember where unknown loads are after the most recent
|
|
/// unknown store, as we iterate. As with Defs and Uses, this is here
|
|
/// to minimize construction/destruction.
|
|
std::vector<SUnit *> PendingLoads;
|
|
|
|
public:
|
|
explicit ScheduleDAGInstrs(MachineFunction &mf,
|
|
const MachineLoopInfo &mli,
|
|
const MachineDominatorTree &mdt);
|
|
|
|
virtual ~ScheduleDAGInstrs() {}
|
|
|
|
/// NewSUnit - Creates a new SUnit and return a ptr to it.
|
|
///
|
|
SUnit *NewSUnit(MachineInstr *MI) {
|
|
#ifndef NDEBUG
|
|
const SUnit *Addr = &SUnits[0];
|
|
#endif
|
|
SUnits.push_back(SUnit(MI, (unsigned)SUnits.size()));
|
|
assert(Addr == &SUnits[0] && "SUnits std::vector reallocated on the fly!");
|
|
SUnits.back().OrigNode = &SUnits.back();
|
|
return &SUnits.back();
|
|
}
|
|
|
|
/// BuildSchedGraph - Build SUnits from the MachineBasicBlock that we are
|
|
/// input.
|
|
virtual void BuildSchedGraph();
|
|
|
|
/// ComputeLatency - Compute node latency.
|
|
///
|
|
virtual void ComputeLatency(SUnit *SU);
|
|
|
|
virtual MachineBasicBlock *EmitSchedule();
|
|
|
|
/// Schedule - Order nodes according to selected style, filling
|
|
/// in the Sequence member.
|
|
///
|
|
virtual void Schedule() = 0;
|
|
|
|
virtual void dumpNode(const SUnit *SU) const;
|
|
|
|
virtual std::string getGraphNodeLabel(const SUnit *SU) const;
|
|
};
|
|
}
|
|
|
|
#endif
|