This is to avoid relying on the post-isel hook.
This change also enable the saddr pattern selection for atomic
intrinsics in GlobalISel.
I don't like using int_ prefixes here. This is deceptive and makes it look like you are using raw intrinsics
Addressed review comment
This just moved the int_ prefix, and doesn't eliminate it. I just realized these are the cases that only come from the intrinsics, so maybe this is fine (but just directly using int_ before would be better)
Revert to Diff 1
Ping; This is required for D124086