[Backport] tree-optimization/114672 - WIDEN_MULT_PLUS_EXPR type mismatch

[Richard Ball]

Hi,

Requesting permission to backport: 
https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=912753cc5f18d786e334dd425469fa7f93155661
to fix the issue listed here:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114672
in gcc-12 and gcc-13.

Thanks,
Richard