[Bug tree-optimization/97381] [11 Regression] ice error: invalid types in nop conversion

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97381

--- Comment #4 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
(In reply to David Binderman from comment #2)
> Reduced C code is:
> 
> int a;
> void b() {
>   char c = 27;
>   for (; c <= 85; c += 1) {
>     a /= 148372120 * c;
>     if (a)
>       for (;;)
>         ;
>   }
> }

This looks similar to PR97378.

There is no definition of _8 but there is still a dangling use left:

  c.2_6 = (unsigned char) _8;