[PATCH] D30437: [DAGCombiner] Do various combine on usubo.

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix created this revision.

This essentially does the same transform as for SUBC.


https://reviews.llvm.org/D30437

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/xaluo.ll

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