http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46259
--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> 2010-11-01 16:21:11
UTC ---
(In reply to comment #5)
> If I had to guess, one of these two hunks is probably responsible:
>
>
> --- trunk/gcc/tree-vect-stmts.c 2010/10/31 01:58:12 166101
> +++ trunk/gcc/tree-vect-stmts.c 2010/10/31 02:20:22 166102
> @@ -987,9 +987,7 @@
> loop_vec_info loop_vinfo = STMT_VINFO_LOOP_VINFO (stmt_vinfo);
> tree vec_inv;
> tree vec_cst;
> - tree t = NULL_TREE;
> tree def;
> - int i;
> enum vect_def_type dt;
> bool is_simple_use;
> tree vector_type;
> @@ -1055,13 +1049,7 @@
> if (vect_print_dump_info (REPORT_DETAILS))
> fprintf (vect_dump, "Create vector_inv.");
>
> - for (i = nunits - 1; i >= 0; --i)
> - {
> - t = tree_cons (NULL_TREE, def, t);
> - }
> -
> - /* FIXME: use build_constructor directly. */
> - vec_inv = build_constructor_from_list (vector_type, t);
> + vec_inv = build_vector_from_val (vector_type, def);
> return vect_init_vector (stmt, vec_inv, vector_type, NULL);
> }
>
Revert this patch fixes the problem.
