------- Comment #8 from rguenther at suse dot de 2008-03-04 21:35 ------- Subject: Re: adding unused char field inhibits optimization
On Tue, 4 Mar 2008, dann at godzilla dot ics dot uci dot edu wrote: > ------- Comment #7 from dann at godzilla dot ics dot uci dot edu 2008-03-04 > 21:32 ------- > (In reply to comment #6) > > Actually RTL alias is just using the same routines. > Might be, but the RTL level code that optimizes away the abort() in both > testcases (if I remember well nonoverlapping_component_refs_p). I still have the abort () with -O2. > > > > # SMT.4_6 = VDEF <SMT.4_4(D)> > > # SMT.5_7 = VDEF <SMT.5_5(D)> > > x_1(D)->x = 0; > > # SMT.5_8 = VDEF <SMT.5_7> > > y_2(D)->y = 1; > > > > vs. > > > > # SMT.18_5 = VDEF <SMT.18_4(D)> > > x_1(D)->x = 0; > > # SMT.19_7 = VDEF <SMT.19_6(D)> > > y_2(D)->y = 1; > > That is for this testcase, but what about the impact on .final_cleanup for > something big like combine.c? No idea, but feel free to check. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27799
