/// \brief Calculate auxiliary information for a virtual register such as its
/// spill weight and allocation hint.
class VirtRegAuxInfo {
+ public:
+ typedef float (*NormalizingFn)(float, unsigned);
+
+ private:
MachineFunction &MF;
LiveIntervals &LIS;
const MachineLoopInfo &Loops;
const MachineBlockFrequencyInfo &MBFI;
DenseMap<unsigned, float> Hint;
+ NormalizingFn normalize;
+
public:
VirtRegAuxInfo(MachineFunction &mf, LiveIntervals &lis,
const MachineLoopInfo &loops,
- const MachineBlockFrequencyInfo &mbfi)
- : MF(mf), LIS(lis), Loops(loops), MBFI(mbfi) {}
+ const MachineBlockFrequencyInfo &mbfi,
+ NormalizingFn norm = normalizeSpillWeight)
+ : MF(mf), LIS(lis), Loops(loops), MBFI(mbfi), normalize(norm) {}
/// \brief (re)compute li's spill weight and allocation hint.
void calculateSpillWeightAndHint(LiveInterval &li);
/// live intervals.
void calculateSpillWeightsAndHints(LiveIntervals &LIS, MachineFunction &MF,
const MachineLoopInfo &MLI,
- const MachineBlockFrequencyInfo &MBFI);
+ const MachineBlockFrequencyInfo &MBFI,
+ VirtRegAuxInfo::NormalizingFn norm =
+ normalizeSpillWeight);
}
#endif // LLVM_CODEGEN_CALCSPILLWEIGHTS_H
void llvm::calculateSpillWeightsAndHints(LiveIntervals &LIS,
MachineFunction &MF,
const MachineLoopInfo &MLI,
- const MachineBlockFrequencyInfo &MBFI) {
+ const MachineBlockFrequencyInfo &MBFI,
+ VirtRegAuxInfo::NormalizingFn norm) {
DEBUG(dbgs() << "********** Compute Spill Weights **********\n"
<< "********** Function: " << MF.getName() << '\n');
MachineRegisterInfo &MRI = MF.getRegInfo();
- VirtRegAuxInfo VRAI(MF, LIS, MLI, MBFI);
+ VirtRegAuxInfo VRAI(MF, LIS, MLI, MBFI, norm);
for (unsigned i = 0, e = MRI.getNumVirtRegs(); i != e; ++i) {
unsigned Reg = TargetRegisterInfo::index2VirtReg(i);
if (MRI.reg_nodbg_empty(Reg))
if (isRematerializable(li, LIS, *MF.getTarget().getInstrInfo()))
totalWeight *= 0.5F;
- li.weight = normalizeSpillWeight(totalWeight, li.getSize());
+ li.weight = normalize(totalWeight, li.getSize());
}