[Bug rtl-optimization/91347] [7/8/9/10 Regression] pointer_string in linux vsprintf.c is miscompiled when sibling calls are optimized

[svens at stackframe dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91347

--- Comment #14 from Sven Schnelle <svens at stackframe dot org> ---
I tested the patch with my (previously broken) kernel Build, and the issue
seems to be fixed. Thanks!