[PATCH] [X86] Improve DAGCombiner BUILD_VECTOR with two sources of elements

[Michael Kuperstein]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6749

Files:
  llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  llvm/trunk/test/CodeGen/X86/vector-shuffle-combining.ll

EMAIL PREFERENCES
  http://reviews.llvm.org/settings/panel/emailpreferences/
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