------- Comment #21 from davidxl at gcc dot gnu dot org 2010-08-30 03:19 ------- (In reply to comment #17) > tree iv optimization : 32.57 (20%) usr 0.10 ( 5%) sys 32.73 (20%) wall > 322095 kB (18%) ggc > > > 20% is still completely unreasonable for IV optimization. >
There was a patch in trunk that may double the time in ivopt -- i.e. find_optimal_iv_set_1 is done twice, one with the original iv set while the other with full set. This probably needs to be revisited. David -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45422
