Target/SystemZ/SystemZHazardRecognizer.cpp

46 getNumDecoderSlots(SUnit *SU) const {
47   const MCSchedClassDesc *SC = getSchedClass(SU);
61 unsigned SystemZHazardRecognizer::getCurrCycleIdx(SUnit *SU) const {
66   if (SU != nullptr && !fitsIntoCurrentGroup(SU)) {
77 getHazardType(SUnit *SU, int Stalls) {
78   return (fitsIntoCurrentGroup(SU) ? NoHazard : Hazard);
92 SystemZHazardRecognizer::fitsIntoCurrentGroup(SUnit *SU) const {
93   const MCSchedClassDesc *SC = getSchedClass(SU);
105   if (CurrGroupSize == 2 && has4RegOps(SU->getInstr()))
109   // SU should fit into current group. NumSlots should be 1 or 0,
111   assert ((getNumDecoderSlots(SU) <= 1) && (CurrGroupSize < 3) &&
167 void SystemZHazardRecognizer::dumpSU(SUnit *SU, raw_ostream &OS) const {
168   OS << "SU(" << SU->NodeNum << "):";
169   OS << TII->getName(SU->getInstr()->getOpcode());
171   const MCSchedClassDesc *SC = getSchedClass(SU);
202   if (SU->isUnbuffered)
204   if (has4RegOps(SU->getInstr()))
269 // Update state with SU as the next scheduled unit.
271 EmitInstruction(SUnit *SU) {
272   const MCSchedClassDesc *SC = getSchedClass(SU);
273   LLVM_DEBUG(dbgs() << "++ HazardRecognizer emitting "; dumpSU(SU, dbgs());
277   // If scheduling an SU that must begin a new decoder group, move on
279   if (!fitsIntoCurrentGroup(SU))
283              if (CurGroupDbg.length()) cgd << ", "; dumpSU(SU, cgd););
285   LastEmittedMI = SU->getInstr();
288   if (SU->isCall) {
291     LastEmittedMI = SU->getInstr();
320   if (SU->isUnbuffered) {
321     LastFPdOpCycleIdx = getCurrCycleIdx(SU);
326   // Insert SU into current group by increasing number of slots used
328   CurrGroupSize += getNumDecoderSlots(SU);
329   CurrGroupHas4RegOps |= has4RegOps(SU->getInstr());
331   assert((CurrGroupSize <= GroupLim || CurrGroupSize == getNumDecoderSlots(SU))
332          && "SU does not fit into decoder group!");
340 int SystemZHazardRecognizer::groupingCost(SUnit *SU) const {
341   const MCSchedClassDesc *SC = getSchedClass(SU);
345   // If SU begins new group, it can either break a current group early
353   // Similarly, a group-ending SU may either fit well (last in group), or
357       (CurrGroupSize + getNumDecoderSlots(SU));
364   if (CurrGroupSize == 2 && has4RegOps(SU->getInstr()))
371 bool SystemZHazardRecognizer::isFPdOpPreferred_distance(SUnit *SU) const {
372   assert (SU->isUnbuffered);
380   unsigned SUCycleIdx = getCurrCycleIdx(SU);
387 resourcesCost(SUnit *SU) {
390   const MCSchedClassDesc *SC = getSchedClass(SU);
396   if (SU->isUnbuffered)
397     Cost = (isFPdOpPreferred_distance(SU) ? INT_MIN : INT_MAX);
413   SUnit SU(MI, 0);
416   SU.isCall = MI->isCall();
424       SU.hasReservedResource = true;
427       SU.isUnbuffered = true;
435   EmitInstruction(&SU);