Craig Topper 1153313c33 [LocalStackSlotAllocation] Minor simplifications. NFC ...

Instead of maintaining a separate valid flag for BaseReg, Use
BaseReg.isValid(). I think this is left over from an older
implementation that maintained a vector of base registers.

The other change is not do a speculative assignment to BaseOffset
that needs to be reverted. Only commit it after we do the check.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D141153

2023-01-09 09:45:22 -08:00

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