On Fri, 2005-04-08 at 11:08 -0600, Jeffrey A Law wrote:
> On Fri, 2005-04-08 at 13:04 -0400, Daniel Berlin wrote:
> > > When we rescan the operands, we get a different set of V_MAY_DEFS,
> > > specifically we lose the V_MAY_DEF for SFT.3_20.
> >
> > Why?
> >
> > It should be copying subvars to the new vectorizer variable too.
> > At least, i believe i added that.
> Where would I look for that code? I'm totally unfamiliar with the
> vectorizer code.
> jeff
/** (2) Add aliasing information to the new vector-pointer:
(The points-to info (SSA_NAME_PTR_INFO) may be defined later.)
**/
tag = STMT_VINFO_MEMTAG (stmt_info);
gcc_assert (tag);
get_var_ann (vect_ptr)->type_mem_tag = tag;
get_var_ann (vect_ptr)->subvars = STMT_VINFO_SUBVARS (stmt_info);
from tree-vect-transform.c:vect_create_data_ref_ptr (the
STMT_VINFO_SUBVARS is set in a few routines in tree-vect-analyze.c).
It's quite possible i missed a place in analyze or something that sets
the subvars, or some place that copies the subvars.
The code was not easy to follow, as i imagine you have discovered as
well :)
>
>
