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

[Simon Pilgrim]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D7042

Files:
  llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
  llvm/trunk/lib/Target/X86/X86InstrSSE.td
  llvm/trunk/test/CodeGen/X86/avx-splat.ll
  llvm/trunk/test/CodeGen/X86/avx2-vbroadcast.ll
  llvm/trunk/test/CodeGen/X86/sincos-opt.ll
  llvm/trunk/test/CodeGen/X86/sse41.ll
  llvm/trunk/test/CodeGen/X86/sse_partial_update.ll
  llvm/trunk/test/CodeGen/X86/v2f32.ll
  llvm/trunk/test/CodeGen/X86/vec_cast2.ll
  llvm/trunk/test/CodeGen/X86/vector-shuffle-128-v2.ll
  llvm/trunk/test/CodeGen/X86/vector-shuffle-256-v4.ll
  llvm/trunk/test/CodeGen/X86/vector-shuffle-256-v8.ll
  llvm/trunk/test/CodeGen/X86/vector-shuffle-512-v8.ll
  llvm/trunk/test/CodeGen/X86/vector-shuffle-combining.ll

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