[PATCH] D141665: [DAGCombine][AArch64][ARM] Combine abd(sub(x, y)) to abd if the sub is nsw

[Simon Pilgrim via Phabricator via llvm-commits]

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

LGTM - cheers



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Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:10120
+        TLI.isOperationLegalOrCustom(ISD::ABDS, VT))
+      return DAG.getNode(ISD::ABDS, SDLoc(N), VT, Op0, Op1);
     return SDValue();
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You can probably hoist this before the sext/zext test?


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  https://reviews.llvm.org/D141665/new/

https://reviews.llvm.org/D141665