PostRAHazardRecognizer.h [plain text]
#ifndef LLVM_CODEGEN_EXACTHAZARDRECOGNIZER_H
#define LLVM_CODEGEN_EXACTHAZARDRECOGNIZER_H
#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
#include "llvm/System/DataTypes.h"
#include <cassert>
#include <cstring>
#include <string>
namespace llvm {
class InstrItineraryData;
class SUnit;
class PostRAHazardRecognizer : public ScheduleHazardRecognizer {
class ScoreBoard {
unsigned *Data;
size_t Depth;
size_t Head;
public:
ScoreBoard():Data(NULL), Depth(0), Head(0) { }
~ScoreBoard() {
delete[] Data;
}
size_t getDepth() const { return Depth; }
unsigned& operator[](size_t idx) const {
assert(Depth && "ScoreBoard was not initialized properly!");
return Data[(Head + idx) % Depth];
}
void reset(size_t d = 1) {
if (Data == NULL) {
Depth = d;
Data = new unsigned[Depth];
}
memset(Data, 0, Depth * sizeof(Data[0]));
Head = 0;
}
void advance() {
Head = (Head + 1) % Depth;
}
void dump() const;
};
const InstrItineraryData *ItinData;
ScoreBoard ReservedScoreboard;
ScoreBoard RequiredScoreboard;
public:
PostRAHazardRecognizer(const InstrItineraryData *ItinData);
virtual HazardType getHazardType(SUnit *SU);
virtual void Reset();
virtual void EmitInstruction(SUnit *SU);
virtual void AdvanceCycle();
};
}
#endif