[Bug target/78095] [7 Regression] valgrind build error on ppc64le

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78095

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
So why does valgrind try to clobber r2?  That just isn't going to work...