[Bug middle-end/77964] [7 Regression] Linux kernel firmware loader miscompiled

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77964

--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> Looks like a kernel issue. An asm ("", "+r"(x)); is needed in the source for
> __start_builtin_fw and __end_builtin_fw

Shouldn't we recommend "+g" instead of "+r"?

(In reply to Markus Trippelsdorf from comment #9)
> Is subtracting undefined, too?
> 
> -       for (b_fw = __start_builtin_fw; b_fw != __end_builtin_fw; b_fw++) {
> +       for (b_fw = __start_builtin_fw;  __end_builtin_fw - b_fw; b_fw++) {

See bug 77813.