http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59660
--- Comment #3 from rguenther at suse dot de <rguenther at suse dot de> --- On Tue, 7 Jan 2014, hubicka at ucw dot cz wrote: > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59660 > > --- Comment #2 from Jan Hubicka <hubicka at ucw dot cz> --- > > I have noticed these, too (-Og is pessimzed by them). The pattern is > > generated > > by gimplifying. > > I wondered why we can't simply update gimplifier to not produce them? > (this is what I wanted to look into today, it seems pretty common pattern > confusing inliner). > For sure we should better also handle it either in cfg-cleanup or copyprop > for cases that arrise as a result of other optimizations, but it seems it > would speed things up if we did not wrap each predicate calls in its own three > BBs. Not all testcases can be handled at gimplification time IIRC. Which means "testcases welcome" first, so we can look at them individually.
