[Bug rtl-optimization/99680] [11 Regression] AddressSanitizer: global-buffer-overflow since g:04b4828c6dd2

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99680

--- Comment #2 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Sorry for the troubles with my previous patch. I should have not be in hurry to
fix PR99663.

I'll fix it today.  Jakub's patch could be a candidate but I prefer check
constraint[0] on '\0'.