MachineScheduler: Add parameter name comments

Author: arsenm

llvm/lib/CodeGen/MachineScheduler.cpp

@@ -1664,7 +1664,8 @@ void ScheduleDAGMILive::scheduleMI(SUnit *SU, bool IsTopNode) {
     if (ShouldTrackPressure) {
       // Update top scheduled pressure.
       RegisterOperands RegOpers;
-      RegOpers.collect(*MI, *TRI, MRI, ShouldTrackLaneMasks, false);
+      RegOpers.collect(*MI, *TRI, MRI, ShouldTrackLaneMasks,
+                       /*IgnoreDead=*/false);
       if (ShouldTrackLaneMasks) {
         // Adjust liveness and add missing dead+read-undef flags.
         SlotIndex SlotIdx = LIS->getInstructionIndex(*MI).getRegSlot();
@@ -1698,7 +1699,8 @@ void ScheduleDAGMILive::scheduleMI(SUnit *SU, bool IsTopNode) {
     }
     if (ShouldTrackPressure) {
       RegisterOperands RegOpers;
-      RegOpers.collect(*MI, *TRI, MRI, ShouldTrackLaneMasks, false);
+      RegOpers.collect(*MI, *TRI, MRI, ShouldTrackLaneMasks,
+                       /*IgnoreDead=*/false);
       if (ShouldTrackLaneMasks) {
         // Adjust liveness and add missing dead+read-undef flags.
         SlotIndex SlotIdx = LIS->getInstructionIndex(*MI).getRegSlot();