3 * File name: ir/ana/irouts.h
4 * Purpose: Compute and access out edges.
5 * Author: Goetz Lindenmaier
9 * Copyright: (c) 2002-2003 Universität Karlsruhe
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
16 * Implements Def-Use edges, also called outedges.
18 * @author Goetz Lindenmaier
20 * @todo eventually add reverse conrtol flow graph. (If needed.)
29 /*------------------------------------------------------------------*/
30 /* Accessing the out datastructures. */
31 /* These routines only work properly if the ir_graph is in state */
32 /* outs_consistent or outs_inconsistent. */
33 /*------------------------------------------------------------------*/
35 /** To iterate through the successors iterate from 0 to i < get_irn_outs(). No
36 order of successors guaranteed. Will return edges from block to floating
37 nodes even if irgraph is in state "op_pin_state_floats". */
38 /* returns the number of successors of the node: */
39 int get_irn_n_outs (ir_node *node);
41 /** Get predecessor n */
42 ir_node *get_irn_out (ir_node *node, int pos);
44 /** Set predecessor n */
45 void set_irn_out (ir_node *node, int pos, ir_node *out);
47 /* Methods to iterate through the control flow graph. Iterate from 0 to
48 i < get_Block_cfg_outs(block). No order of successors guaranteed. */
49 int get_Block_n_cfg_outs (ir_node *node);
51 /** Access predecessor n. */
52 ir_node *get_Block_cfg_out (ir_node *node, int pos);
54 #ifndef _IRG_WALK_FUNC_TYPEDEF_
55 #define _IRG_WALK_FUNC_TYPEDEF_
56 /** The type of the walk function */
57 typedef void irg_walk_func(ir_node *, void *);
60 /** Walks over the graph starting at node. Walks also if graph is in state
61 "outs_inconsistent". Assumes current_ir_graph is set properly. */
62 void irg_out_walk(ir_node *node,
63 irg_walk_func *pre, irg_walk_func *post,
66 /** Walks only over Block nodes in the graph. Has it's own visited
67 flag, so that it can be interleaved with the other walker.
68 node must be either op_Block or mode_X. */
69 void irg_out_block_walk(ir_node *node,
70 irg_walk_func *pre, irg_walk_func *post,
73 /*------------------------------------------------------------------*/
74 /* Building and Removing the out datastructure */
75 /*------------------------------------------------------------------*/
77 /** Computes the out edges. Sets a flag in irg to "outs_consistent". If the
78 graph is changed this flag must be set to "outs_inconsistent". Computes
79 out edges from block to floating nodes even if graph is in state
80 "op_pin_state_floats". Optimizes Tuple nodes. */
81 void compute_outs(ir_graph *irg);
82 /** Computes the out edges in interprocedural view */
83 void compute_ip_outs(void);
84 /** Frees the out datastructures. Sets the flag in irg to "outs_none". */
85 void free_ip_outs(void);
86 void free_outs(ir_graph *irg);
88 #endif /* _IROUTS_H_ */