[PATCH] D41927: DAGCombine: Let truncates negate extension through extract-subvector

[Zvi Rackover via Phabricator via llvm-commits]

zvi updated this revision to Diff 129468.
zvi added a comment.

Rebase after adding the missing zext cases


https://reviews.llvm.org/D41927

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/trunc-subvector.ll

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