[PATCH] D31527: InstSimplify: A shuffle of a splat is always the splat itself

[Zvi Rackover via Phabricator via llvm-commits]

zvi updated this revision to Diff 93799.
zvi added a comment.

1. Following another enlightening comment from Simon, generalize to when the non-splat operand is not selected from.
2. Added the symmetrical case. Not relying on canonical form has a toll of duplication - will refactor in a follow-up patch.


Repository:
  rL LLVM

https://reviews.llvm.org/D31527

Files:
  lib/Analysis/InstructionSimplify.cpp
  test/Transforms/InstSimplify/shufflevector.ll

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