lib/CodeGen/RegisterCoalescer.cpp

1384     LiveInterval &DstInt = LIS->getInterval(DstReg);
1385     for (LiveInterval::SubRange &SR : DstInt.subranges()) {
1412     if (NewIdx == 0 && DstInt.hasSubRanges()) {
1418       for (LiveInterval::SubRange &SR : DstInt.subranges()) {
1424         LiveInterval::SubRange *SR = DstInt.createSubRange(Alloc, MaxMask);
1437     if (NewIdx != 0 && DstInt.hasSubRanges()) {
1442       for (LiveInterval::SubRange &SR : DstInt.subranges()) {
1455         DstInt.removeEmptySubRanges();
1683   LiveInterval *DstInt = DstIsPhys ? nullptr : &LIS->getInterval(DstReg);
1685   if (DstInt && DstInt->hasSubRanges() && DstReg != SrcReg) {
1694       addUndefFlag(*DstInt, UseIdx, MO, SubReg);
1718     if (DstInt && !Reads && SubIdx && !UseMI->isDebugValue())
1719       Reads = DstInt->liveAt(LIS->getInstructionIndex(*UseMI));
1734         if (!DstInt->hasSubRanges()) {
1736           LaneBitmask FullMask = MRI->getMaxLaneMaskForVReg(DstInt->reg);
1739           DstInt->createSubRangeFrom(Allocator, UsedLanes, *DstInt);
1744           DstInt->createSubRange(Allocator, UnusedLanes);
1750         addUndefFlag(*DstInt, UseIdx, MO, SubIdx);
1901   // always canonicalizes DstInt to be it.  The output "SrcInt" will not have