[Bug tree-optimization/90892] [9/10 regression] -O2 miscompiles __builtin_strncmp with string containing '\0'

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90892

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
I've got a patch candidate that I've been testing.