------- Additional Comments From dberlin at gcc dot gnu dot org 2005-08-29 13:40 ------- Subject: Re: Missed pre opportunity
On Mon, 29 Aug 2005, pinskia at gcc dot gnu dot org wrote: > > ------- Additional Comments From pinskia at gcc dot gnu dot org 2005-08-29 > 12:53 ------- > Yes it is a dup as, the issue is we don't pre things for: > if (a) > d = b + c; > else > d = b + e; > > Where b is a complex expression (yes this is simplifing it). As a general statement, this is true, but in a loop is different because it should be partially redundant over the backedge. I'm tentatively with zdenek that we should be PRE'ing something here. I'll look at the actual dumps :) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23619
