** irgraph.h: ir graph construction
*/
+/* $Id$ */
+
+#include "irop.h"
+
# ifndef _IRGRAPH_H_
# define _IRGRAPH_H_
# include "tv.h"
* datastructure is used to build the Phi nodes and removed after
* completion of the graph. There is no path from end to start in the
* graph after calling ir_graph.
+ * FIELDS
+ * pinned set to "pinned" if no global cse was performed on the graph.
+ * set to "floats" if global cse was performed (and during construction:
+ * did actually change something). Code placement is necessary.
* SOURCE
*/
optimizations. */
extern ir_graph *current_ir_graph;
+/* This flag indicate the current view. The behaviour of some methods
+ * (get_irn_*, set_irn_*) is influenced by this flag. */
+extern bool interprocedural_view;
+
/* Create a new ir graph to built ir for a procedure.
ent is the entity representing this procedure, i.e., the type of the
entity must be of a method type. The constructor automatically sets the
field irg of the entity as well as current_ir_graph to the new ir graph.
n_loc is the number of local variables in this procedure including
- the procedure parameters. */
+ the procedure parameters.
+ The state of the ir graph is: phase_building, pinned, no_outs. */
ir_graph *new_ir_graph (entity *ent, int n_loc);
+/* Frees the passed irgraph.
+ Deallocates all nodes in this graph and the ir_graph structure.
+ Sets the field irgraph in the corresponding entity to NULL.
+ Does not remove the irgraph from the list in irprog (requires
+ inefficient search, call remove_irp_irg by hand).
+ Does not free types, entities or modes that are used only by this
+ graph, nor the entity standing for this graph. */
+void free_ir_graph (ir_graph *irg);
+
/* access routines for all ir_graph attributes */
ir_node *get_irg_start_block (ir_graph *irg);
void set_irg_start_block (ir_graph *irg, ir_node *node);
ir_node *get_irg_bad (ir_graph *irg);
void set_irg_bad (ir_graph *irg, ir_node *node);
+/* Use new_Unknown() instead!! */
+ir_node *get_irg_unknown (ir_graph *irg);
+void set_irg_unknown (ir_graph *irg, ir_node *node);
+
ir_node *get_irg_current_block (ir_graph *irg);
void set_irg_current_block (ir_graph *irg, ir_node *node);
entity *get_irg_ent (ir_graph *irg);
void set_irg_ent (ir_graph *irg, entity *ent);
+type *get_irg_frame_type (ir_graph *irg);
+void set_irg_frame_type (ir_graph *irg, type *ftp);
+/* To test for a frame type */
+int is_frame_type(type *ftp);
+
/* Use not encouraged, internal of Phi construction algorithm. */
int get_irg_n_loc (ir_graph *irg);
void set_irg_n_loc (ir_graph *irg, int n_loc);
+
+/********************************************************************************/
+/* States of an ir_graph. */
+/********************************************************************************/
+
+/* An ir_graph can have different states. These states represent the analysis
+ information associated with the graph. Optimizations invalidate these
+ states. */
+
+/* state: phase values: phase_building, phase_high, phase_low.
+ The irg is in phase_building during construction of the irgraph. It is in
+ phase_high after construction. All nodes are allowed. To get the irgraph
+ into phase_low all Sel nodes must be removed and replaced by explicit
+ address computations. SymConst size and typetag nodes must be removed (@@@
+ really?). Initialization of memory allocated by Alloc must be explicit.
+ @@@ More conditions? */
+typedef enum {
+ phase_building,
+ phase_high,
+ phase_low
+} irg_phase_state;
+irg_phase_state get_irg_phase_state (ir_graph *irg);
+void set_irg_phase_low(ir_graph *irg);
+
+/* state: pinned
+ The graph is "pinned" if all nodes are accosiated with a basic block.
+ It is in state "floats" if nodes are in arbitrary blocks. In state
+ "floats" the block predecessor is set in all nodes, but this can be an
+ invalid block, i.e., the block is not a dominator of all the uses of
+ the node.
+ The enum op_pinned is defined in irop.h. */
+op_pinned get_irg_pinned (ir_graph *irg);
+
+/* state: outs_state
+ Outs are the back edges or def-use edges.
+ Values: no_outs, outs_consistent, outs_inconsistent
+ no_outs: outs are not computed, no memory is allocated.
+ outs_consistent: outs are computed and correct,
+ outs_inconsistent: outs have been computed, memory is still allocated,
+ but the graph has been changed since. */
+typedef enum {
+ no_outs,
+ outs_consistent,
+ outs_inconsistent
+} irg_outs_state;
+irg_outs_state get_irg_outs_state(ir_graph *irg);
+void set_irg_outs_inconsistent(ir_graph *irg);
+
+/* state: dom_state
+ Signals the state of the dominator infomation.
+ Values: no_dom, dom_consistent, dom_inconsistent
+ no_dom: doms are not computed, no memory is allocated. The access routines
+ may not be used.
+ dom_consistent: dominator information is computed and correct,
+ dom_inconsistent: dominator information is computed, memory is still allocated,
+ but the graph has been changed since. Using the access routines is possible,
+ obtained information may be incorrect. */
+typedef enum {
+ no_dom,
+ dom_consistent,
+ dom_inconsistent
+} irg_dom_state;
+irg_dom_state get_irg_dom_state(ir_graph *irg);
+void set_irg_dom_inconsistent(ir_graph *irg);
+
/* increments visited by one */
void inc_irg_visited(ir_graph *irg);
unsigned long get_irg_visited (ir_graph *irg);
void set_irg_visited(ir_graph *irg, unsigned long i);
+unsigned long get_max_irg_visited(void);
/* increments block_visited by one */
void inc_irg_block_visited(ir_graph *irg);
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