This fixes a few omissions in generalizing strided load support.
Bootstrap and regtest on x86_64-unknown-linux-gnu is running.
Richard.
2012-05-14 Richard Guenther <rguent...@suse.de>
PR tree-optimization/53331
* tree-vect-data-refs.c (vect_verify_datarefs_alignment): Ignore
strided loads.
* tree-vect-stmts.c (vect_model_load_cost): Handle strided loads.
Index: gcc/tree-vect-data-refs.c
===================================================================
*** gcc/tree-vect-data-refs.c (revision 187456)
--- gcc/tree-vect-data-refs.c (working copy)
*************** vect_verify_datarefs_alignment (loop_vec
*** 1078,1083 ****
--- 1078,1088 ----
|| !STMT_VINFO_VECTORIZABLE (stmt_info))
continue;
+ /* Strided loads perform only component accesses, alignment is
+ irrelevant for them. */
+ if (STMT_VINFO_STRIDE_LOAD_P (stmt_info))
+ continue;
+
supportable_dr_alignment = vect_supportable_dr_alignment (dr, false);
if (!supportable_dr_alignment)
{
Index: gcc/tree-vect-stmts.c
===================================================================
*** gcc/tree-vect-stmts.c (revision 187456)
--- gcc/tree-vect-stmts.c (working copy)
*************** vect_model_load_cost (stmt_vec_info stmt
*** 1032,1041 ****
}
/* The loads themselves. */
! vect_get_load_cost (first_dr, ncopies,
! ((!STMT_VINFO_GROUPED_ACCESS (stmt_info)) || group_size > 1
! || slp_node),
! &inside_cost, &outside_cost);
if (vect_print_dump_info (REPORT_COST))
fprintf (vect_dump, "vect_model_load_cost: inside_cost = %d, "
--- 1032,1050 ----
}
/* The loads themselves. */
! if (STMT_VINFO_STRIDE_LOAD_P (stmt_info))
! {
! /* N scalar loads plus gathering them into a vector.
! ??? scalar_to_vec isn't the cost for that. */
! inside_cost += (vect_get_stmt_cost (scalar_load) * ncopies
! * TYPE_VECTOR_SUBPARTS (STMT_VINFO_VECTYPE (stmt_info)));
! inside_cost += ncopies * vect_get_stmt_cost (scalar_to_vec);
! }
! else
! vect_get_load_cost (first_dr, ncopies,
! ((!STMT_VINFO_GROUPED_ACCESS (stmt_info))
! || group_size > 1 || slp_node),
! &inside_cost, &outside_cost);
if (vect_print_dump_info (REPORT_COST))
fprintf (vect_dump, "vect_model_load_cost: inside_cost = %d, "
