/// lookup, do so. Otherwise return -1.
int TargetInstrInfo::computeDefOperandLatency(
const InstrItineraryData *ItinData,
- const MachineInstr *DefMI, bool FindMin) const {
+ const MachineInstr *DefMI) const {
// Let the target hook getInstrLatency handle missing itineraries.
if (!ItinData)
return getInstrLatency(ItinData, DefMI);
- // Return a latency based on the itinerary properties and defining instruction
- // if possible. Some common subtargets don't require per-operand latency,
- // especially for minimum latencies.
- if (FindMin) {
- // If MinLatency is valid, call getInstrLatency. This uses Stage latency if
- // it exists before defaulting to MinLatency.
- if (ItinData->SchedModel->MinLatency >= 0)
- return getInstrLatency(ItinData, DefMI);
-
- // If MinLatency is invalid, OperandLatency is interpreted as MinLatency.
- // For empty itineraries, short-cirtuit the check and default to one cycle.
- if (ItinData->isEmpty())
- return 1;
- }
- else if(ItinData->isEmpty())
+ if(ItinData->isEmpty())
return defaultDefLatency(ItinData->SchedModel, DefMI);
// ...operand lookup required
unsigned TargetInstrInfo::
computeOperandLatency(const InstrItineraryData *ItinData,
const MachineInstr *DefMI, unsigned DefIdx,
- const MachineInstr *UseMI, unsigned UseIdx,
- bool FindMin) const {
+ const MachineInstr *UseMI, unsigned UseIdx) const {
- int DefLatency = computeDefOperandLatency(ItinData, DefMI, FindMin);
+ int DefLatency = computeDefOperandLatency(ItinData, DefMI);
if (DefLatency >= 0)
return DefLatency;
unsigned InstrLatency = getInstrLatency(ItinData, DefMI);
// Expected latency is the max of the stage latency and itinerary props.
- if (!FindMin)
- InstrLatency = std::max(InstrLatency,
- defaultDefLatency(ItinData->SchedModel, DefMI));
+ InstrLatency = std::max(InstrLatency,
+ defaultDefLatency(ItinData->SchedModel, DefMI));
return InstrLatency;
}