[Bug rtl-optimization/101523] Huge number of combine attempts

[krebbel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101523

--- Comment #14 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
If my analysis from comment #1 is correct, combine does superfluous steps here.
Getting rid of this should not cause any harm, but should be beneficial for
other targets as well. I agree that the patch I've proposed is kind of a hack.
Do you think this could be turned into a proper fix?