[PATCH] D105632: [LV] Use lookThroughAnd with logical reductions

[Sanjay Patel via Phabricator via llvm-commits]

spatel added inline comments.


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Comment at: llvm/test/Transforms/LoopVectorize/trunc-reductions.ll:237
+  %sum.02p = phi i32 [ %min, %for.body ], [ 0, %entry ]
+  %sum.02 = and i32 %sum.02p, 65535
+  %gep = getelementptr inbounds i16, i16* %ptr, i32 %iv
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It's independent of this patch, but I noticed that all of the affected tests have this kind of mask op on the phi. 
I think -instcombine will eliminate that op, so -loop-vectorize will not typically see this pattern, and we still get the wide reduction op. Is there a plan to account for that?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105632/new/

https://reviews.llvm.org/D105632