[PATCH] [X86][SSE] Added general integer shuffle matching for MOVQ instruction

[Simon Pilgrim]

Updated with assembly comments now that http://reviews.llvm.org/D7228 has been committed.

Also added additional tests against 4i32 and 8i16 vectors.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D7256

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/combine-or.ll
  test/CodeGen/X86/vector-shuffle-128-v16.ll
  test/CodeGen/X86/vector-shuffle-128-v4.ll
  test/CodeGen/X86/vector-shuffle-128-v8.ll

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