https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80399
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-04-12
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Huh, sth folds (t + 4294967295) * 16 to (t + 268435455) * 16.
Certainly "interesting". I suppose we're trying to make constants cheaper
but that's sth quite premature in this particular case.
Looks like it's iterating extract_muldiv doing t * 16 + 4294967295 * 16 and
fold_plusminus_mult_expr undoing it until it arrives at a point where
extract_muldiv iteration gives up.
