[PATCH] D58242: Teach instcombine about remaining idemptotent atomicrmw types

[JF Bastien via Phabricator via llvm-commits]

jfb accepted this revision.
jfb added a comment.

lgtm

For the idempotent RMW, `atomicrmw or, ptr, 0` sgtm. I assume that you'd do the same for floating-point (with a cast)? I wonder if in the long run we'd actually just want a separate instruction for this...


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