[Bug tree-optimization/107833] wrong code at -Os and above on x86_64-linux-gnu since r12-5138-ge82c382971664d6f

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107833

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
> Isn't there an uninitialized read from "i" here?

Yes ...

>  At least on the second
> time through the outer loop, if (a < h) is true since 1 < 0.
> 
> >         c = *f;
> >       }
> >     for (h = 0; h < 3; h++) {
> >       if (d)
> >         break;
> 
> d is nonzero so h will always be 0 in this function.

... but as you correctly said, it's never executed as 'a < h' is always false.

> 
> >       i--;
> >       printf("0");
> >     }
> >   }
> >   return 0;
> > }
> 
> Unless I'm missing something....