https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93494
--- Comment #5 from Zdenek Sojka <zsojka at seznam dot cz> ---
(In reply to Jakub Jelinek from comment #3)
> With a slightly modified testcase:
> unsigned short a;
>
> int
> main ()
> {
> register unsigned long long y = 0;
> int x = __builtin_add_overflow (y, (unsigned char) 0, &a);
> if (x)
> __builtin_abort ();
> return 0;
> }
> the wrong-code started with
> r10-3989-gdeb254e029c9430a0c3d0cb044e4ca7b3f15b619
> And as PR93348 has been fixed in 9/8 too, I believe all we have remaining is
> a wrong-code on the trunk.
Thank you for checking this. I am sorry for not using a more recent gcc-8 and
gcc-9, my build scripts currently do not work for the branches.
