[PATCH] D37665: [SelectionDAG] Teach simplifyDemandedBits to handle shifts by constant splat vectors

[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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Comment at: lib/Target/ARM/ARMInstrNEON.td:5537
+def : Pat<(v2i64 (NEONvshl (anyext (v2i32 DPR:$Rn)), (i32 32))),
+          (VSHLLi32 DPR:$Rn, 32)>;
 
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I guess the zext/sext patterns will still trigger if the value has multiple uses...?

This looks fine.


https://reviews.llvm.org/D37665