Scott Constable ad4313fc83 [X86] Fix bug in -mlvi-cfi that may clobber a live register ...

Fix for this bug: https://bugs.llvm.org/show_bug.cgi?id=47740

The fix uses the existing findDeadCallerSavedReg() function instead of a hacky heuristic to find a scratch register to clobber.

Differential Revision: https://reviews.llvm.org/D88925

2020-10-07 18:33:51 -07:00

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