[PATCH] [Mips] Add support for min/max/umin/umax atomics

[PATCH] [Mips] Add support for min/max/umin/umax atomics

In order to properly implement these atomic we need one register more than other
binary atomics. It is used for storing result from comparing values in addition
to the one that is used for actual result of operation.

https://reviews.llvm.org/D71028

Changed-by: James Clarke <jrtc27@debian.org>
[Backported to 9 by replacing Register with unsigned]

Gbp-Pq: Name D71028-mips-rust-test.diff