[Bug middle-end/109609] [12/13/14 Regression] tail call for function even when passing a ptr which references a local array still

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109609

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
strncpy second argument is an array rather than necessarily a string and
characters after '\0' are not copied, so if n is non-zero, it reads between 1
and n characters from the source array (not sure if a dumb implementation could
try to read all characters and only copy those until '\0' inclusive though).