+ // When we first encounter a new virtual register, it
+ // must be a definition.
+ assert(MI->getOperand(i).isDef() &&
+ "frame index virtual missing def!");
+ // We can't have nested virtual register live ranges because
+ // there's only a guarantee of one scavenged register at a time.
+ assert (CurrentVirtReg == 0 &&
+ "overlapping frame index virtual registers!");
+
+ // If the target gave us information about what's in the register,
+ // we can use that to re-use scratch regs.
+ DenseMap<unsigned, FrameConstantEntry>::iterator Entry =
+ FrameConstantRegMap.find(Reg);
+ trackingCurrentValue = Entry != FrameConstantRegMap.end();
+ if (trackingCurrentValue) {
+ SPAdj = (*Entry).second.second;
+ Value = (*Entry).second.first;
+ } else
+ SPAdj = Value = 0;