[Bug middle-end/102285] New flag -ftrivial-auto-var-init=zero causes crash in pr82421.c

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102285

--- Comment #22 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, my proposed patch seems to work.  I've adjusted it to not regress
previously correctly handled cases and will test it fully.