------- Comment #15 from dave at hiauly1 dot hia dot nrc dot ca 2008-06-22
21:34 -------
Subject: Re: [4.4 Regression] FAIL: gcc.c-torture/execute/20040709-1.c
execution at -O2 and above
> > 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;
> Well, SRA is broken (cost-wise at least) since lxos changes.
Why the shift? It seems incorrect.
SRA also seems to be manipulating the k and l fields together for
some reason. Why not all the fields since K is packed and the total
bit length is less than a word?
Dave
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35518
