[PATCH][AArch64] Custom lower concat_vector patterns with v4i16, v4i32, v8i8, v8i16, v16i8 types.

[Ana Pazos]

Chad, 
Thanks for fixing these pattern failures.
LGTM.
Ana.

-----Original Message-----
From: Chad Rosier [mailto:mcrosier at codeaurora.org] 
Sent: Thursday, January 30, 2014 7:37 AM
To: llvm-commits at cs.uiuc.edu
Cc: t.p.northover at gmail.com; apazos at codeaurora.org; Hao.Liu at arm.com;
kevinqindev at gmail.com; Jiangning.Liu at arm.com
Subject: [PATCH][AArch64] Custom lower concat_vector patterns with v4i16,
v4i32, v8i8, v8i16, v16i8 types.

All,
The attached patch custom lowers concat_vector patterns with v4i16, v4i32,
v8i8, v8i16, v16i8 types that have the same operand of type v1* using the
DUP instruction.  In the case of a constant operand the VDUP, rather than
VDUPLANE, is used because it avoids an INS instruction.

 Chad

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