[Bug middle-end/78433] [7 Regression] glibc posix/execvpe.c gets miscompiled with -O3

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78433

--- Comment #7 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
To reproduce build glibc with -O3 and then run "make check".

Or directly:
 ~ % ~/glibc_build/elf/ld.so --library-path /home/trippels/glibc_build/
~/glibc_build/posix/tst-vfork3