[PATCH] PR 18466: Fix ARM Pseudo Expansion

[Tim Northover]

Hi Weiming,

> Currently, ARM Pseudo expansion for NEON misses implicit uses for src regs
> in some cases, which may eventually result into mis-scheduling (post-RA).

Generally the patch looks good. There's some slightly dodgy
indentation though, with "if" and "else" indented on separate lines.
Other than that, I think you can just commit.

Cheers.

Tim.