[PATCH] D112085: [DAGCombiner] fold bit-hack form of usubsat

[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 with one minor



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Comment at: llvm/test/CodeGen/X86/psubus.ll:114
+; AVX512-NEXT:    vpmaxud %xmm1, %xmm0, %xmm0
+; AVX512-NEXT:    vpsubd %xmm1, %xmm0, %xmm0
 ; AVX512-NEXT:    retq
----------------
We have a couple of 'UseVPTERNLOG' style checks in code already - you can add that to the D112095 special case to fix this.


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  https://reviews.llvm.org/D112085/new/

https://reviews.llvm.org/D112085