[Bug target/101523] Huge number of combine attempts

[rguenth at gcc dot gnu.org]

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

--- Comment #46 from Richard Biener <rguenth at gcc dot gnu.org> ---
Maybe combine already knows that it just "keeps i2" rather than replacing it?
When !newi2pat we seem to delete i2.  Anyway, somebody more familiar with
combine should produce a good(TM) patch.