[PATCH] D19874: [InstSimplify] use computeKnownBits on shift amount operands

[Sanjay Patel via llvm-commits]

spatel updated this revision to Diff 56038.
spatel added a comment.

Patch updated:
We don't have to special case an i1 type - the mask calculation works as-is there. Any shift of an i1 will always return the shifted operand because an actual shift would be undefined.


http://reviews.llvm.org/D19874

Files:
  lib/Analysis/InstructionSimplify.cpp
  test/Transforms/InstSimplify/shift-knownbits.ll

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