[PATCH] D56875: [DAGCombiner] narrow vector binop with 2 insert subvector operands

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 182830.
spatel added a comment.
This revision is now accepted and ready to land.

Patch updated:

1. Compute the constant vector that we're inserting into rather than assuming it is undef.
2. Moved code comment as suggested.
3. Rebased with diffs for 'xor' tests.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56875/new/

https://reviews.llvm.org/D56875

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/avx512-hadd-hsub.ll
  test/CodeGen/X86/scalarize-fp.ll
  test/CodeGen/X86/vector-partial-undef.ll

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