[Bug middle-end/108209] goof in genmatch.cc:commutative_op

[amonakov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108209

--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Keeping notes as I go...

Duplicated checks for 'op0' in lower_for are duplicated.