------- Comment #2 from jakub at gcc dot gnu dot org 2010-01-14 15:36 ------- The problem here seems to be that trivially_conflicts_p called insert_backedge_copies returns 0 for -g0 and 1 for -g in: <bb 5>: # i_25 = PHI <i_11(5), a_3(D)(4)> # DEBUG last => i_25 D.2725_8 = (long unsigned int) i_25; D.2726_9 = D.2725_8 * 4; prephitmp.9_10 = pretmp.12_39 + D.2726_9; i_11 = *prephitmp.9_10; # DEBUG i => i_11 # DEBUG last => i_25 # DEBUG i => i_11 if (i_11 != -1) goto <bb 5>; else goto <bb 6>; (for -g0 of course without the # DEBUG lines).
-- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42719
