[PATCH] [X86][SSE] Added support for SSE3 lane duplication shuffle instructions

[Simon Pilgrim]

Thanks Chandler - I've moved the MOVDDUP match after the BROADCAST match to fix this.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D7042

Files:
  lib/Target/X86/InstPrinter/X86InstComments.cpp
  lib/Target/X86/Utils/X86ShuffleDecode.cpp
  lib/Target/X86/Utils/X86ShuffleDecode.h
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/sincos-opt.ll
  test/CodeGen/X86/sse41.ll
  test/CodeGen/X86/sse_partial_update.ll
  test/CodeGen/X86/v2f32.ll
  test/CodeGen/X86/vec_cast2.ll
  test/CodeGen/X86/vector-shuffle-256-v4.ll
  test/CodeGen/X86/vector-shuffle-256-v8.ll
  test/CodeGen/X86/vector-shuffle-512-v8.ll

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