1 /* Copyright (C) 2002 by Universitaet Karlsruhe
2 ** All rights reserved.
4 ** Authors: Goetz Lindenmaier
6 ** irouts.h: Implements Def-Use edges, also called outedges.
7 ** @@@ eventually add reverse conrtol flow graph. (If needed.)
18 /**********************************************************************/
19 /** Accessing the out datastructures. **/
20 /** These routines only work properly if the ir_graph is in state **/
21 /** outs_consistent or outs_inconsistent. **/
22 /**********************************************************************/
24 /* To iterate through the successors iterate from 0 to i < get_irn_outs(). No
25 order of successors guaranteed. Will return edges from block to floating
26 nodes even if irgraph is in state "floats". */
27 /* returns the number of successors of the node: */
28 int get_irn_n_outs (ir_node *node);
29 /* Access predecessor n */
30 INLINE ir_node *get_irn_out (ir_node *node, int pos);
31 INLINE void set_irn_out (ir_node *node, int pos, ir_node *out);
33 /* Methods to iterate through the control flow graph. Iterate from 0 to
34 i < get_Block_cfg_outs(block). No order of successors guaranteed. */
35 int get_Block_n_cfg_outs (ir_node *node);
36 /* Access predecessor n. */
37 INLINE ir_node *get_Block_cfg_out (ir_node *node, int pos);
39 #ifndef _IRG_WALK_FUNC_TYPEDEF_
40 #define _IRG_WALK_FUNC_TYPEDEF_
41 typedef void (irg_walk_func)(ir_node *, void *);
44 /* Walks over the graph starting at node. Walks also if graph is in state
45 "outs_inconsistent". Assumes current_ir_graph is set properly. */
46 void irg_out_walk(ir_node *node,
47 irg_walk_func *pre, irg_walk_func *post,
50 /* Walks only over Block nodes in the graph. Has it's own visited
51 flag, so that it can be interleaved with the other walker.
52 node must be either op_Block or mode_X. */
53 void irg_out_block_walk(ir_node *node,
54 irg_walk_func *pre, irg_walk_func *post,
57 /**********************************************************************/
58 /* Building and Removing the out datasturcture **/
59 /**********************************************************************/
61 /* Computes the out edges. Sets a flag in irg to "outs_consistent". If the
62 graph is changed this flag must be set to "outs_inconsistent". Computes
63 out edges from block to floating nodes even if graph is in state
64 "floats". Optimizes Tuple nodes. */
65 void compute_outs(ir_graph *irg);
66 /* Frees the out datastructures. Sets the flag in irg to "no_outs". */
67 void free_outs(ir_graph *irg);
69 #endif /* _IROUTS_H_ */