[Bug rtl-optimization/87600] Fix for PRs 86939 and 87479 causes build issues for several targets

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87600

--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Oh btw, the #c3 problem isn't new at all, it happens with 4.8 already for
example.