[Bug rtl-optimization/63957] [5 Regression] rename -fuse-caller-save to -fipa-ra

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63957

--- Comment #5 from vries at gcc dot gnu.org ---
(In reply to vries from comment #4)
> Created attachment 34154 [details]
> tentative patch

Minimal c build + regression test ok on x86_64. I'll bootstrap and reg-test.