Guozhi Wei 1fd553c934 [PPC] Prefer direct move on power8 if load 1 or 2 bytes to VSR ...

Power8 has MTVSRWZ but no LXSIBZX/LXSIHZX, so move 1 or 2 bytes to VSR through MTVSRWZ is much faster than store the extended value into stack and load it with LXSIWZX.
This patch fixes pr31144.

Differential Revision: https://reviews.llvm.org/D27287

llvm-svn: 289473

2016-12-12 22:09:02 +00:00

532 B

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