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
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
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 Public header for the automatically updating outs.
23 * @author Sebastian Hack
27 #ifndef FIRM_IR_IREDGES_H
28 #define FIRM_IR_IREDGES_H
30 #include "firm_types.h"
31 #include "iredgekinds.h"
35 * Get the first edge pointing to some node.
36 * @note There is no order on out edges. First in this context only
37 * means, that you get some starting point into the list of edges.
38 * @param irn The node.
39 * @param kind The kind of the edge.
40 * @return The first out edge that points to this node.
42 FIRM_API const ir_edge_t *get_irn_out_edge_first_kind(const ir_node *irn,
46 * Get the next edge in the out list of some node.
47 * @param irn The node.
48 * @param last The last out edge you have seen.
49 * @return The next out edge in @p irn 's out list after @p last.
51 FIRM_API const ir_edge_t *get_irn_out_edge_next(const ir_node *irn,
52 const ir_edge_t *last);
55 * A convenience iteration macro over all out edges of a node.
56 * @param irn The node.
57 * @param kind The edge's kind.
58 * @param edge An ir_edge_t pointer which shall be set to the current
61 #define foreach_out_edge_kind(irn, edge, kind) \
62 for(edge = get_irn_out_edge_first_kind(irn, kind); edge; edge = get_irn_out_edge_next(irn, edge))
65 * A convenience iteration macro over all out edges of a node, which is safe
66 * against alteration of the current edge.
68 * @param irn The node.
69 * @param edge An ir_edge_t pointer which shall be set to the current edge.
70 * @param ne The next edge, enables alteration safe edge processing.
71 * @param kind The kind of the edge.
73 #define foreach_out_edge_kind_safe(irn, edge, ne, kind) \
74 for((edge) = (get_irn_out_edge_first_kind(irn, kind)), (ne) = ((edge) ? (get_irn_out_edge_next(irn, edge)) : NULL); \
75 edge; (edge) = (ne), (ne) = ((edge) ? (get_irn_out_edge_next(irn, edge)) : NULL))
78 * Convenience macro for normal out edges.
80 #define foreach_out_edge(irn, edge) foreach_out_edge_kind(irn, edge, EDGE_KIND_NORMAL)
83 * Convenience macro for normal out edges.
85 #define foreach_out_edge_safe(irn, edge, tmp) foreach_out_edge_kind_safe(irn, edge, tmp, EDGE_KIND_NORMAL)
88 * A convenience iteration macro for all control flow edges.
90 #define foreach_block_succ(bl, edge) foreach_out_edge_kind(bl, edge, EDGE_KIND_BLOCK)
93 * Get the source node of an edge.
94 * @param edge The edge.
95 * @return The source node of that edge.
97 FIRM_API ir_node *get_edge_src_irn(const ir_edge_t *edge);
100 * Get the position of an edge.
101 * @param edge The edge.
102 * @return The position in the in array of that edges source.
104 FIRM_API int get_edge_src_pos(const ir_edge_t *edge);
107 * Get the edge object of an outgoing edge at a node.
108 * @param irg The graph, the node is in.
109 * @param irn The node at which the edge originates.
110 * @param pos The position of the edge.
111 * @param kind The kind of the edge.
112 * @return The corresponding edge object or NULL,
113 * if no such edge exists.
115 FIRM_API const ir_edge_t *get_irn_edge_kind(ir_graph *irg, const ir_node *irn,
116 int pos, ir_edge_kind_t kind);
119 * Get the number of registered out edges for a specific kind.
120 * @param irn The node.
121 * @param kind The kind.
123 FIRM_API int get_irn_n_edges_kind(const ir_node *irn, ir_edge_kind_t kind);
126 * Check, if the out edges are activated.
128 * @param irg The graph.
129 * @param kind The edge kind.
131 * @return 1, if the edges are present for the given irg, 0 if not.
133 FIRM_API int edges_activated_kind(const ir_graph *irg, ir_edge_kind_t kind);
136 * Activate the edges for an irg.
138 * @param irg The graph to activate the edges for.
139 * @param kind The edge kind.
141 FIRM_API void edges_activate_kind(ir_graph *irg, ir_edge_kind_t kind);
144 * Deactivate the edges for an irg.
146 * @param irg The graph.
147 * @param kind The edge kind.
149 FIRM_API void edges_deactivate_kind(ir_graph *irg, ir_edge_kind_t kind);
152 * Reroute edges of a specified kind from an old node to
155 * @param old the old node
156 * @param nw the new node
157 * @param kind the edge kind
158 * @param irg the graph on which the rerouting occurs
160 FIRM_API void edges_reroute_kind(ir_node *old, ir_node *nw, ir_edge_kind_t kind,
164 * Verifies the out edges of graph @p irg.
165 * @return 1 if a problem was found, 0 otherwise
167 FIRM_API int edges_verify(ir_graph *irg);
170 * veriy a certrain kind of out edges of graph @p irg.
171 * @returns 1 if a problem was found, 0 otherwise
173 FIRM_API int edges_verify_kind(ir_graph *irg, ir_edge_kind_t kind);
176 * Set edge verification flag.
178 FIRM_API void edges_init_dbg(int do_dbg);
181 * Creates an ir_graph pass for edges_verify().
183 * @param name the name of this pass or NULL
184 * @param assert_on_problem assert if problems were found
186 * @return the newly created ir_graph pass
188 FIRM_API ir_graph_pass_t *irg_verify_edges_pass(const char *name,
189 unsigned assert_on_problem);
191 FIRM_API const ir_edge_t *get_irn_edge(ir_graph *irg, const ir_node *src,
194 #define edges_reroute(old, nw, irg) edges_reroute_kind(old, nw, EDGE_KIND_NORMAL, irg)
195 #define edges_activated(irg) (edges_activated_kind(irg, EDGE_KIND_NORMAL) && edges_activated_kind(irg, EDGE_KIND_BLOCK))
197 #ifndef get_irn_n_edges
198 #define get_irn_n_edges(irn) get_irn_n_edges_kind(irn, EDGE_KIND_NORMAL)
201 #ifndef get_irn_out_edge_first
202 #define get_irn_out_edge_first(irn) get_irn_out_edge_first_kind(irn, EDGE_KIND_NORMAL)
205 #ifndef get_block_succ_first
206 #define get_block_succ_first(irn) get_irn_out_edge_first_kind(irn, EDGE_KIND_BLOCK)
209 #ifndef get_block_succ_next
210 #define get_block_succ_next(irn, last) get_irn_out_edge_next(irn, last)
214 * Activates data and block edges for an irg.
215 * If the irg phase is phase_backend, Dependence edges are
216 * additionally activated.
218 * @param irg The graph to activate the edges for.
220 FIRM_API void edges_activate(ir_graph *irg);
223 * Deactivate data and block edges for an irg.
224 * If the irg phase is phase_backend, Dependence edges are
225 * additionally deactivated.
226 * @param irg The graph.
228 FIRM_API void edges_deactivate(ir_graph *irg);
231 * Ensure that edges are activated.
233 * @param irg the IR graph
235 * @return 0 if edges was deactivated before the call, 1 else
237 FIRM_API int edges_assure(ir_graph *irg);
240 * Ensure that edges of a given kind are activated.
242 * @param irg the IR graph
243 * @param kind the edge kind
245 * @return 0 if edges was deactivated before the call, 1 else
247 FIRM_API int edges_assure_kind(ir_graph *irg, ir_edge_kind_t kind);
249 FIRM_API void edges_node_deleted(ir_node *irn, ir_graph *irg);
252 * Notify normal and block edges.
254 FIRM_API void edges_notify_edge(ir_node *src, int pos, ir_node *tgt,
255 ir_node *old_tgt, ir_graph *irg);
258 * Walks only over Block nodes in the graph. Uses the block visited
259 * flag, so that it can be interleaved with another walker.
261 * @param block the start block
262 * @param pre the pre visit function
263 * @param post the post visit function
264 * @param env the environment for the walker
266 FIRM_API void irg_block_edges_walk(ir_node *block, irg_walk_func *pre,
267 irg_walk_func *post, void *env);
269 FIRM_API void irg_walk_edges(ir_node *start, irg_walk_func *pre,
270 irg_walk_func *post, void *env);
273 * Reset the user's private data at offset 'offset'
274 * The user has to remember his offset and the size of his data!
275 * Caution: Using wrong values here can destroy other users private data!
277 * @param irg the IR graph to operate on
278 * @param offset offset of the private data inside the edge
279 * @param size length of the private data inside the edge
281 FIRM_API void edges_reset_private_data(ir_graph *irg, int offset,