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/*========================== begin_copyright_notice ============================
Copyright (C) 2017-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#ifndef __FREQUENCYINFO_H__
#define __FREQUENCYINFO_H__
#include "common/LLVMWarningsPush.hpp"
#include "llvm/Support/ScaledNumber.h"
#include "common/LLVMWarningsPop.hpp"
#include <cstdint>
#include <list>
#include <vector>
#include <unordered_map>
namespace vISA {
class IR_Builder;
class LiveRange;
class LivenessAnalysis;
class GlobalRA;
class G4_Kernel;
class G4_BB;
class G4_INST;
class G4_Label;
class RPE;
class FrequencyInfo {
typedef enum {
PGSS_VISA_EMBED = 0x1C,
PGSS_VISA_COMP = 0x18,
PGSS_VISA_ENABLE = 0x10,
} PGSS_STEP_t;
typedef enum {
PGSS_VISA_DUMP_TRANS = 0x10,
PGSS_VISA_DUMP_ANAL = 0x20,
PGSS_VISA_DUMP_COLOR = 0x40,
PGSS_VISA_DUMP_THR = 0x80,
PGSS_VISA_DUMP_NOFREQ = 0x100,
} PGSS_DUMP_t;
public:
FrequencyInfo(IR_Builder *builder, G4_Kernel &k);
void transferFreqToG4Inst(uint64_t digits, int16_t scale);
void storeStaticFrequencyAsMetadata(G4_INST *i,
llvm::ScaledNumber<uint64_t> curFreq);
void updateStaticFrequencyForBasicBlock(G4_BB *bb);
void updateStaticFrequency(
std::unordered_map<G4_Label *, std::vector<G4_BB *>> &subroutines);
bool underFreqSpillThreshold(const std::list<vISA::LiveRange *> &spilledLRs,
int instNum, unsigned int legacySpillFillCount,
bool legacyUnderThreshold);
void computeFreqSpillCosts(GlobalRA &gra, bool useSplitLLRHeuristic,
const RPE *rpe);
void sortBasedOnFreq(std::vector<LiveRange *> &lrs);
bool hasFreqMetaData(G4_INST *i);
void deriveRefFreq(G4_BB *bb);
void dump() const {}
void initForRegAlloc(LivenessAnalysis *l);
void initGRFSpillFillFreq() {
GRFSpillFillFreq = llvm::ScaledNumber<uint64_t>::getZero();
};
bool isProfileEmbeddingEnabled() {
return (enabledSteps & PGSS_VISA_EMBED) != 0;
}
bool isSpillCostComputationEnabled() {
return (enabledSteps & PGSS_VISA_COMP) != 0;
}
bool isFreqBasedSpillSelectionEnabled() {
return (enabledSteps & PGSS_VISA_ENABLE) != 0;
}
bool willDumpLLVMToG4() { return (dumpEnabled & PGSS_VISA_DUMP_TRANS) != 0; }
bool willDumpSpillCostAnalysis() {
return (dumpEnabled & PGSS_VISA_DUMP_ANAL) != 0;
}
bool willDumpColoringOrder() {
return (dumpEnabled & PGSS_VISA_DUMP_COLOR) != 0;
}
bool willDumpOnSpilThreshold() {
return (dumpEnabled & PGSS_VISA_DUMP_THR) != 0;
}
bool willDumpNoFreqReport() {
return (dumpEnabled & PGSS_VISA_DUMP_NOFREQ) != 0;
}
private:
unsigned dumpEnabled;
unsigned enabledSteps;
G4_Kernel &kernel;
IR_Builder *irb;
G4_INST *lastInstMarked;
std::unordered_map<G4_BB *, llvm::ScaledNumber<uint64_t>> BlockFreqInfo;
std::unordered_map<G4_INST *, G4_INST *> tailInsts;
std::unordered_map<G4_INST *, llvm::ScaledNumber<uint64_t>> InstFreqInfo;
llvm::ScaledNumber<uint64_t> freqScale;
llvm::ScaledNumber<uint64_t> GRFSpillFillFreq;
LivenessAnalysis *liveAnalysis;
std::unordered_map<LiveRange *, float> freqSpillCosts;
std::unordered_map<LiveRange *, llvm::ScaledNumber<uint64_t>> refFreqs;
std::unordered_map<LiveRange *, unsigned> staticRefCnts;
llvm::ScaledNumber<uint64_t> getBlockFreqInfo(G4_BB *bb);
void setBlockFreqInfo(G4_BB *bb, llvm::ScaledNumber<uint64_t> freq) {
BlockFreqInfo[bb] = freq;
return;
};
float getFreqSpillCost(LiveRange *lr) {
return freqSpillCosts[lr];
};
void setFreqSpillCost(LiveRange *lr, float spillCost) {
freqSpillCosts[lr] = spillCost;
return;
};
llvm::ScaledNumber<uint64_t> getRefFreq(LiveRange *lr) {
return refFreqs[lr];
};
void setRefFreq(LiveRange *lr, llvm::ScaledNumber<uint64_t> refFreq) {
refFreqs[lr] = refFreq;
return;
};
void addupRefFreq(LiveRange *lr, llvm::ScaledNumber<uint64_t> refFreq) {
if (refFreqs.find(lr) == refFreqs.end())
refFreqs[lr] = llvm::ScaledNumber<uint64_t>::getZero();
refFreqs[lr] += refFreq;
if (willDumpOnSpilThreshold() || willDumpSpillCostAnalysis()) {
if (staticRefCnts.find(lr) == staticRefCnts.end())
staticRefCnts[lr] = 0;
staticRefCnts[lr] += 1;
}
return;
};
unsigned getStaticRefCnt(LiveRange* lr) { return staticRefCnts[lr];}
llvm::ScaledNumber<uint64_t> getFreqInfoFromInst(G4_INST *inst);
};
} // namespace vISA
#endif
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