------- Comment #14 from rguenther at suse dot de 2008-06-22 21:13 ------- Subject: Re: [4.4 Regression] FAIL: gcc.c-torture/execute/20040709-1.c execution at -O2 and above
On Sun, 22 Jun 2008, danglin at gcc dot gnu dot org wrote: > ------- Comment #13 from danglin at gcc dot gnu dot org 2008-06-22 20:44 > ------- > retmeK (struct K x) > { > <unnamed-unsigned:10> SR.14; > <unnamed-unsigned:15> SR.13; > <unnamed-unsigned:7> SR.12; > <unnamed-unsigned:10> SR.11; > <unnamed-unsigned:15> SR.10; > <unnamed-unsigned:15> x$i; > <unnamed-unsigned:10> x$j; > <unnamed-unsigned:7> x$B0F7; > struct K D.1258; > > <bb 2>: > x$B0F7_1 = 0; > x$j_2 = 0; > x$i_3 = 0; > SR.13_4 = x.i; > x$i_5 = SR.13_4; > SR.14_6 = x.j; > x$j_7 = SR.14_6; > x$B0F7_8 = BIT_FIELD_REF <x, 7, 0>; > D.1258.i ={v} x$i_5; > D.1258.j ={v} x$j_7; > SR.12_9 = x$B0F7_8 >> 1; > BIT_FIELD_REF <D.1258, 7, 0> ={v} SR.12_9; > return D.1258; > > } > > Don't understand... > > At -O0, we just have > > retmeK (struct K x) > { > struct K D.1260; > > <bb 2>: > D.1260 = x; > return D.1260; > > } > > and it works. Well, SRA is broken (cost-wise at least) since lxos changes. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35518