[Bug middle-end/90345] too pessimistic check whether pointer may alias a local variable

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90345

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Related to PR 50262 (and a few others).  Looks like GCC did not notice that
a->digits comes from an argument so therefor cannot alias the local variable.