- addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS);
- } else
- extendDef(Idx, LocNo, 0, 0, 0, LIS, MDT, UVS);
+ if (LI)
+ addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS);
+ continue;
+ }
+
+ // For physregs, use the live range of the first regunit as a guide.
+ unsigned Unit = *MCRegUnitIterator(Loc.getReg(), &TRI);
+ LiveInterval *LI = &LIS.getRegUnit(Unit);
+ const VNInfo *VNI = LI->getVNInfoAt(Idx);
+ // Don't track copies from physregs, it is too expensive.
+ extendDef(Idx, LocNo, LI, VNI, 0, LIS, MDT, UVS);