+unsigned TargetSchedModel::computeInstrLatency(unsigned Opcode) const {
+ assert(hasInstrSchedModel() && "Only call this function with a SchedModel");
+
+ unsigned SCIdx = TII->get(Opcode).getSchedClass();
+ const MCSchedClassDesc *SCDesc = SchedModel.getSchedClassDesc(SCIdx);
+ unsigned Latency = 0;
+
+ if (SCDesc->isValid() && !SCDesc->isVariant()) {
+ for (unsigned DefIdx = 0, DefEnd = SCDesc->NumWriteLatencyEntries;
+ DefIdx != DefEnd; ++DefIdx) {
+ // Lookup the definition's write latency in SubtargetInfo.
+ const MCWriteLatencyEntry *WLEntry =
+ STI->getWriteLatencyEntry(SCDesc, DefIdx);
+ Latency = std::max(Latency, capLatency(WLEntry->Cycles));
+ }
+ return Latency;
+ }
+
+ assert(Latency && "No MI sched latency");
+ return 0;
+}
+
+unsigned
+TargetSchedModel::computeInstrLatency(const MachineInstr *MI,
+ bool UseDefaultDefLatency) const {