* @brief Compute and access out edges (also called def-use edges).
* @author Goetz Lindenmaier, Michael Beck
* @date 1.2002
- * @version $Id$
*/
#ifndef FIRM_ANA_IROUTS_H
#define FIRM_ANA_IROUTS_H
#include "firm_types.h"
#include "begin.h"
-/*------------------------------------------------------------------*/
-/* Accessing the out datastructures. */
-/* These routines only work properly if the ir_graph is in state */
-/* outs_consistent or outs_inconsistent. */
-/*------------------------------------------------------------------*/
+/**
+ * @ingroup irana
+ * @defgroup irout Reverse Edges
+ * Out-Edges are the reverse of the edges in a firm graph (also called def-use
+ * edges)
+ * @{
+ */
-/** To iterate through the successors iterate from 0 to i < get_irn_outs(). No
- order of successors guaranteed. Will return edges from block to floating
- nodes even if irgraph is in state "op_pin_state_floats". */
-/* returns the number of successors of the node: */
-FIRM_API int get_irn_n_outs(const ir_node *node);
+/** Returns the number of successors of the node: */
+FIRM_API unsigned get_irn_n_outs(const ir_node *node);
-/** Get the User of a node from the Def-Use edge at position pos. */
-FIRM_API ir_node *get_irn_out(const ir_node *def, int pos);
+/** Returns the User of a node from the Def-Use edge at position pos. */
+FIRM_API ir_node *get_irn_out(const ir_node *def, unsigned pos);
/**
- * Get the User and its input position from the Def-Use edge of def
+ * Returns the User and its input position from the Def-Use edge of def
* at position pos.
*/
-FIRM_API ir_node *get_irn_out_ex(const ir_node *def, int pos, int *in_pos);
+FIRM_API ir_node *get_irn_out_ex(const ir_node *def, unsigned pos, int *in_pos);
/**
- * Set the User at position pos.
+ * Sets the User at position pos.
*
* @param def the Def node
* @param pos the number of the Def-Use edge tat is modified
* @param use the Use node
* @param in_pos the number of the corresponding Use-Def edge in the use node in array
*/
-FIRM_API void set_irn_out(ir_node *def, int pos, ir_node *use, int in_pos);
-
-/* Methods to iterate through the control flow graph. Iterate from 0 to
- i < get_Block_cfg_outs(block). No order of successors guaranteed. */
+FIRM_API void set_irn_out(ir_node *def, unsigned pos, ir_node *use, int in_pos);
-/** Return the number of control flow successors, ignore keep-alives. */
-FIRM_API int get_Block_n_cfg_outs(const ir_node *node);
+/** Returns the number of control flow successors, ignore keep-alives. */
+FIRM_API unsigned get_Block_n_cfg_outs(const ir_node *node);
-/** Return the number of control flow successors, honor keep-alives. */
-FIRM_API int get_Block_n_cfg_outs_ka(const ir_node *node);
+/** Returns the number of control flow successors, honor keep-alives. */
+FIRM_API unsigned get_Block_n_cfg_outs_ka(const ir_node *node);
/** Access predecessor n, ignore keep-alives. */
-FIRM_API ir_node *get_Block_cfg_out(const ir_node *node, int pos);
+FIRM_API ir_node *get_Block_cfg_out(const ir_node *node, unsigned pos);
/** Access predecessor n, honor keep-alives. */
-FIRM_API ir_node *get_Block_cfg_out_ka(const ir_node *node, int pos);
+FIRM_API ir_node *get_Block_cfg_out_ka(const ir_node *node, unsigned pos);
-/** Walks over the graph starting at node. Walks also if graph is in state
- "outs_inconsistent". Assumes current_ir_graph is set properly. */
+/**
+ * Walks over the graph starting at node. Walks also if graph is in state
+ * "outs_inconsistent".
+ */
FIRM_API void irg_out_walk(ir_node *node, irg_walk_func *pre,
irg_walk_func *post, void *env);
-/** Walks only over Block nodes in the graph. Has it's own visited
- flag, so that it can be interleaved with the other walker.
- node must be either op_Block or mode_X. */
+/**
+ * Walks only over Block nodes in the graph. Has its own visited
+ * flag, so that it can be interleaved with the other walker.
+ * node must be either op_Block or mode_X.
+ */
FIRM_API void irg_out_block_walk(ir_node *node, irg_walk_func *pre,
irg_walk_func *post, void *env);
/**
- * returns 1 if outs have been computed for a node, 0 otherwise.
- *
- * this is useful to detect newly created nodes that have no outs set yet
+ * Computes the out edges. Sets a flag in irg to "outs_consistent". If the
+ * graph is changed this flag must be set to "outs_inconsistent". Computes
+ * out edges from block to floating nodes even if graph is in state
+ * "op_pin_state_floats". Optimizes Tuple nodes.
*/
-FIRM_API int get_irn_outs_computed(const ir_node *node);
-
-/*------------------------------------------------------------------*/
-/* Building and Removing the out datastructure */
-/*------------------------------------------------------------------*/
-
-/** Computes the out edges. Sets a flag in irg to "outs_consistent". If the
- graph is changed this flag must be set to "outs_inconsistent". Computes
- out edges from block to floating nodes even if graph is in state
- "op_pin_state_floats". Optimizes Tuple nodes. */
FIRM_API void compute_irg_outs(ir_graph *irg);
-FIRM_API void compute_irp_outs(void);
+/** Recomputes out edges if necessary */
FIRM_API void assure_irg_outs(ir_graph *irg);
+/** Frees memory occupied by out edges datastructures */
FIRM_API void free_irg_outs(ir_graph *irg);
-FIRM_API void free_irp_outs(void);
+
+/** @} */
#include "end.h"
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