[Bug middle-end/83654] -fstack-clash-protection probes below the stack pointer for VLA with constant size

[fw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83654

--- Comment #1 from Florian Weimer <fw at gcc dot gnu.org> ---
I forgot to mention that I used “-O2 -fstack-clash-protection”, but there's a
valgrind warning with -O0, too.