------- 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
