https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72772
--- Comment #2 from amker at gcc dot gnu.org --- (In reply to Richard Biener from comment #1) > Note that for some odd reason creating the preheader causes the PHI to appar. > Fixing that would be appreciated - it's the make_forwarder_block CFG hook > that causes this. Not sure why create_preheader doesn't special-case the > single_entry != NULL case by simply splitting the edge. > Thanks. I am also testing patch to simplify_using_initial_conditions and loop_exits_before_oveflow. I think they worth fixing too because patches are kind like a simplification. Anyway I will send for comment once passes bootstrap&test.
