mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
62 lines
2.1 KiB
C++
62 lines
2.1 KiB
C++
//=- llvm/CodeGen/ExactHazardRecognizer.h - Scheduling Support -*- 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 ExactHazardRecognizer class, which
|
|
// implements hazard-avoidance heuristics for scheduling, based on the
|
|
// scheduling itineraries specified for the target.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_EXACTHAZARDRECOGNIZER_H
|
|
#define LLVM_CODEGEN_EXACTHAZARDRECOGNIZER_H
|
|
|
|
#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
|
|
#include "llvm/CodeGen/ScheduleDAG.h"
|
|
#include "llvm/Target/TargetInstrItineraries.h"
|
|
|
|
namespace llvm {
|
|
class ExactHazardRecognizer : public ScheduleHazardRecognizer {
|
|
// Itinerary data for the target.
|
|
const InstrItineraryData &ItinData;
|
|
|
|
// Scoreboard to track function unit usage. Scoreboard[0] is a
|
|
// mask of the FUs in use in the cycle currently being
|
|
// schedule. Scoreboard[1] is a mask for the next cycle. The
|
|
// Scoreboard is used as a circular buffer with the current cycle
|
|
// indicated by ScoreboardHead.
|
|
unsigned *Scoreboard;
|
|
|
|
// The maximum number of cycles monitored by the Scoreboard. This
|
|
// value is determined based on the target itineraries to ensure
|
|
// that all hazards can be tracked.
|
|
unsigned ScoreboardDepth;
|
|
|
|
// Indices into the Scoreboard that represent the current cycle.
|
|
unsigned ScoreboardHead;
|
|
|
|
// Return the scoreboard index to use for 'offset' cycles in the
|
|
// future. 'offset' of 0 returns ScoreboardHead.
|
|
unsigned getFutureIndex(unsigned offset);
|
|
|
|
// Print the scoreboard.
|
|
void dumpScoreboard();
|
|
|
|
public:
|
|
ExactHazardRecognizer(const InstrItineraryData &ItinData);
|
|
~ExactHazardRecognizer();
|
|
|
|
virtual HazardType getHazardType(SUnit *SU);
|
|
virtual void Reset();
|
|
virtual void EmitInstruction(SUnit *SU);
|
|
virtual void AdvanceCycle();
|
|
};
|
|
}
|
|
|
|
#endif
|