------- Comment #2 from rguenth at gcc dot gnu dot org 2010-05-05 11:13 ------- Ah, it needs -fno-tree-dominator-opts.
We are performing insertion in non-optimal order. We are inserting in BB11 | BB12 / \ BB44 BB45 and insert into BB45 before inserting into BB11, because walking dominators with for (son = first_dom_son (CDI_DOMINATORS, block); son; son = next_dom_son (CDI_DOMINATORS, son)) { new_stuff |= insert_aux (son); } does not visit blocks in optimal order if they are in a cycle. Related to PR43571. -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- BugsThisDependsOn| |43571 Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2010-05-05 11:13:34 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43984