https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84155
--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> There is an important caveat to this fix, which has me very worried:
> On top of removal of uncalled code making the bug disappear, I cannot
> see any difference in the tree dump between the working testcase and
> the failing version.
Confirmed. However looking to the assembly for the first test, I see
...
movq $4, (%rcx) #, MEM[(struct array_t[0:]
*)_21][_23].child.dtype.elem_len
...
movb $1, (%rcx) #, MEM[(struct array_t[0:]
*)_21][_23].child.dtype.rank
...
movb $1, (%rax) #, MEM[(struct array_t[0:]
*)_21][_23].child.dtype.type
...
for the working case that are not present without the patch.
