2 * Copyright (C) 1995-2008 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
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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,
46 ir_nodeset_t *live_set)
48 const arch_env_t *arch_env = block_env;
50 ir_nodeset_iterator_t iter;
53 /* assure that branches and constants are executed last */
54 foreach_ir_nodeset(ready_set, irn, iter) {
55 if (! arch_irn_class_is(arch_env, irn, branch)) {
60 /* at last: schedule branches */
61 ir_nodeset_iterator_init(&iter, ready_set);
62 irn = ir_nodeset_iterator_next(&iter);
67 static void *trivial_init_graph(const list_sched_selector_t *vtab, const be_irg_t *birg)
70 return (void *) be_get_birg_arch_env(birg);
73 static void *trivial_init_block(void *graph_env, ir_node *block)
79 const list_sched_selector_t trivial_selector = {
83 NULL, /* to_appear_in_schedule */
84 NULL, /* node_ready */
85 NULL, /* node_selected */
88 NULL, /* finish_block */
89 NULL /* finish_graph */