[PATCH] D42479: DAGCombiner: Combine SDIV with non-splat vector pow2 divisor

[Zvi Rackover via Phabricator via llvm-commits]

zvi updated this revision to Diff 141228.
zvi added a comment.

- Remove deprecated comment
- Fix variable names
- N1C can be passed to matchUnaryPredicate also when the divisor is a constant-splat. Makes check more efficient as we avoid re-checking the splatted element for every vector element. (why doesn't matchUnaryPredicate check for splat and do the same?)


Repository:
  rL LLVM

https://reviews.llvm.org/D42479

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/combine-sdiv.ll

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