2 * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
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9 * packaging of this file.
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12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Trivial node selector.
23 * @author Sebastian Hack
35 #include "irnodeset.h"
38 #include "belistsched.h"
41 * The trivial selector:
42 * Just assure that branches are executed last, otherwise select
43 * the first node ready.
45 static ir_node *trivial_select(void *block_env, ir_nodeset_t *ready_set, ir_nodeset_t *live_set)
47 const arch_env_t *arch_env = block_env;
49 ir_nodeset_iterator_t iter;
51 /* assure that branches and constants are executed last */
52 foreach_ir_nodeset(ready_set, irn, iter) {
53 if (! arch_irn_class_is(arch_env, irn, branch)) {
58 /* at last: schedule branches */
59 ir_nodeset_iterator_init(&iter, ready_set);
60 irn = ir_nodeset_iterator_next(&iter);
65 static void *trivial_init_graph(const list_sched_selector_t *vtab, const arch_env_t *arch_env, ir_graph *irg)
67 return (void *)arch_env;
70 static void *trivial_init_block(void *graph_env, ir_node *bl)
75 static const list_sched_selector_t trivial_selector_struct = {
79 NULL, /* to_appear_in_schedule */
80 NULL, /* node_ready */
81 NULL, /* node_selected */
84 NULL, /* finish_block */
85 NULL /* finish_graph */
88 const list_sched_selector_t *trivial_selector = &trivial_selector_struct;