[PATCH] D40209: [DAGCombiner] eliminate shuffle of insert element

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 124591.
spatel marked 2 inline comments as done.
spatel added a comment.

Patch updated:

1. Added TODO comment to check for undef shuffle mask elements.
2. Added TODO comment to extend the search for a scalar element.


https://reviews.llvm.org/D40209

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/shuffle-of-insert.ll
  test/CodeGen/X86/sse41.ll
  test/CodeGen/X86/vector-shuffle-128-v2.ll
  test/CodeGen/X86/vector-shuffle-combining.ll

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