Merging r195408:
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r195408 | jiangning | 2013-11-21 18:45:13 -0800 (Thu, 21 Nov 2013) | 2 lines

For AArch64 back-end instruction selection, lower Neon_Lowxxx with EXTRCT_SUBREG.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@195762 91177308-0d34-0410-b5e6-96231b3b80d8