------- Comment #13 from rguenther at suse dot de 2008-12-08 12:40 ------- Subject: Re: TreeSSA-PRE load after store misoptimization
On Mon, 8 Dec 2008, sergeid at il dot ibm dot com wrote: > ------- Comment #12 from sergeid at il dot ibm dot com 2008-12-08 11:53 > ------- > I have to mention that tree PRE still don't catch this LOAD with -O3. > Though the patch Richard posted does the job. Sorry if the comment wasn't clear - -O3 doesn't catch it, but this is only because of the implementation decision fixed with that patch. > (In reply to comment #1) > > It works with -O3 (with partial-partial PRE enabled). At least > > phi-translation > > figures out that *res is zero on the incoming edge. > > > > Un-leashing partial-PRE like with -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38401
