Instead of using operator[], use DenseMap::find to prevent default
constructing an entry if it isn't already in the map.
Also simplify a condition to check for 0 instead of a virtual register.
I'm pretty sure we can only get 0 or a virtual register out of the value
map.
IntVT = TLI->getTypeToTransformTo(PN->getContext(), IntVT);
unsigned BitWidth = IntVT.getSizeInBits();
- Register DestReg = ValueMap[PN];
- if (!Register::isVirtualRegister(DestReg))
+ auto It = ValueMap.find(PN);
+ if (It == ValueMap.end())
return;
+
+ Register DestReg = It->second;
+ if (DestReg == 0)
+ return
+ assert(Register::isVirtualRegister(DestReg) && "Expected a virtual reg");
LiveOutRegInfo.grow(DestReg);
LiveOutInfo &DestLOI = LiveOutRegInfo[DestReg];