Craig Topper cac9773dcc [SelectionDAG] Don't create entries in ValueMap in ComputePHILiveOutRegInfo ...

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.

2022-03-23 09:52:07 -07:00

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