[Bug tree-optimization/126975] bos/bdos(&p->inner, 1) collapses into type 0 when subobject inner ends in a FAM

gustavo at embeddedor dot com via Gcc-bugs <[email protected]> Fri, 21 Aug 2026 07:59:43 +0000

Newsgroups	gmane.comp.gcc.bugs
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126975

--- Comment #7 from Gustavo A. R. Silva <gustavo at embeddedor dot com> ---
(In reply to Richard Biener from comment #5)
> The inner flex array may not extend beyond the outer object size (it might
> cover tail padding that's eventually there).  I'd expect &p->inner to be of
> size 8.

Yes. Tail padding is fine.

I've already submitted a patch for this, if you'd like to take a look:

https://inbox.sourceware.org/gcc-patches/aojDH2Db6XIkVqcf@kspp/T/#u