[PATCH] [AArch64] Fix an ISEL failure around half float data type

[Jiangning Liu]

Hi James and Renato,

I will not commit the file property change.

I've double checked the code and v4f16 has been perfectly supported, so we don't need change anything around v4f16.

Thanks,
-Jiangning

http://reviews.llvm.org/D5094