[PATCH] D78493: [ARM] Don't shrink STM if it would cause an unknown base register store

[Eli Friedman via Phabricator via llvm-commits]

efriedma accepted this revision.
efriedma added a comment.
This revision is now accepted and ready to land.

LGTM

The ARMv7 ARM claims the form with writeback of the lowest register is deprecated, but it looks like ARMv8 un-deprecated it, so we probably don't care about that.


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