[PATCH] D54954: [DAGCombiner] guard against an oversized shift crash

[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


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  https://reviews.llvm.org/D54954/new/

https://reviews.llvm.org/D54954