Sam Tebbs 1a497ae9b8 [ARM][Block placement] Check the predecessor exists before processing it ...

Not all machine loops will have a predecessor. so the pass needs to
check it before continuing.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D94780

2021-01-15 15:45:13 +00:00

9.1 KiB

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