[PATCH] [AArch64] Change default legalization behavior of v1i32 to be widen to v2i32 instead of scalarization

[Ahmed Bougacha]

Right, I meant "widened to 64-bit vectors of the same scalar type"; I corrected that comment and committed the workaround as r220937.

I'm open to alternative solutions!

Thanks,
- Ahmed

http://reviews.llvm.org/D4322