[Bug target/83994] %ebx is clobbered by stack-clash probing for regparm-3 function in PIC mode

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83994

--- Comment #3 from Jeffrey A. Law <law at redhat dot com> ---
I think the problem here is that we don't force the register saves to happen
prior to probing.