[PATCH] D17859: [InstCombine] convert 'isPositive' and 'isNegative' vector comparisons to shifts (PR26701, PR26819)

[Sanjay Patel via llvm-commits]

spatel updated this revision to Diff 57102.
spatel added a comment.

Patch updated:
I didn't see a reply to my latest question: is it really a canonicalization if it only works some of the time?
But here's a semi-canonicalization patch for comparison to the earlier draft.


http://reviews.llvm.org/D17859

Files:
  lib/Transforms/InstCombine/InstCombineCompares.cpp
  test/Transforms/InstCombine/icmp-vec.ll
  test/Transforms/LoopVectorize/if-conversion.ll

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