[Bug middle-end/123978] [16 Regression] leptonica miscompilation on aarch64 since r16-1398

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123978

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 63590
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63590&action=edit
gcc16-pr123978.patch

Untested fix.
Not doing anything with OP_WIDEN_PLUS* for now, I think it is dead code right
now and matches actually WIDEN_SUM_EXPR rather than WIDEN_MULT_PLUS_EXPR, but I
think we should enable it only for GCC 17.