------- Comment #14 from dberlin at gcc dot gnu dot org 2007-10-17 17:41 ------- Subject: Re: [4.3 Regression] Revision 126326 causes 12% slowdown
On 17 Oct 2007 16:59:25 -0000, pinskia at gcc dot gnu dot org <[EMAIL PROTECTED]> wrote: > > > ------- Comment #13 from pinskia at gcc dot gnu dot org 2007-10-17 16:59 > ------- > Can someone explain this may_alias behavior: > > so we have in the IR: > # VUSE <SFT.30_53> > D.892_19 = qav.data; > D.893_20 = (real8[0:] *) D.892_19; > > > in may_alias we get a constraint of: > D.892_19 = qav > D.893_20 = D.892_19 > > > > Isn't this wrong? D. 892_19 shouldn't just point to anywhere? qav should have a constraint somewhere that says qav = &ANYTHING You won't directly see D.892_19 = ANYTHING -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32921
