re PR tree-optimization/30938 (Bootstrap fails on x86_64 for -ftree-vectorize)

        PR tree-optimization/30938
        * tree-vect-transform.c (vectorizable_call): Fix off-by-one error:
        use &dt[nargs-1] instead of &dt[nargs] in the call to
        vect_is_simple_use().

From-SVN: r122323

gcc/ChangeLog

+2007-02-25  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR tree-optimization/30938
+	* tree-vect-transform.c (vectorizable_call): Fix off-by-one error:
+	use &dt[nargs-1] instead of &dt[nargs] in the call to
+	vect_is_simple_use().
+
 2007-02-25  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	* reload.c (find_reloads_address_1): Handle PLUS expressions resulting

gcc/tree-vect-transform.c

@@ -1844,7 +1844,7 @@ vectorizable_call (tree stmt, block_stmt_iterator *bsi, tree *vec_stmt)
 	}
       rhs_type = TREE_TYPE (op);
 
-      if (!vect_is_simple_use (op, loop_vinfo, &def_stmt, &def, &dt[nargs]))
+      if (!vect_is_simple_use (op, loop_vinfo, &def_stmt, &def, &dt[nargs-1]))
 	{
 	  if (vect_print_dump_info (REPORT_DETAILS))
 	    fprintf (vect_dump, "use not simple.");