1 /* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
8 * ir graph construction.
10 * @author Martin Trapp, Christian Schaefer
21 /* to resolve recursion between irnode.h and irgraph.h */
22 #ifndef _IR_NODE_TYPEDEF_
23 #define _IR_NODE_TYPEDEF_
24 typedef struct ir_node ir_node;
27 /* to resolve recursion between entity.h and irgraph.h */
28 #ifndef _IR_GRAPH_TYPEDEF_
29 #define _IR_GRAPH_TYPEDEF_
30 typedef struct ir_graph ir_graph;
35 * NAME Datastructure that holds central information about a procedure
37 * ir_graph *new_ir_graph (entity *ent, int params);
38 * -------------------------------------------------
40 * This constructor generates the basic infrastructure needed to
41 * represent a procedure in FIRM.
43 * The parameters of new_ir_graph are:
45 * *ent A pointer to an entity representing the procedure.
47 * params An integer giving the number of local variables in the
50 * It allocates an ir_graph and sets current_ir_graph to point to this
51 * graph. Further it allocates the following nodes needed for every
54 * * The start block containing a start node and Proj nodes for it's
55 * five results (X, M, P, P, T).
56 * * The end block containing an end node. This block is not matured
57 * after executing new_ir_graph as predecessors need to be added to it.
58 * (Maturing a block means fixing it's number of predecessors.)
59 * * The current block, which is empty and also not matured.
61 * Further it enters the global store into the datastructure of the start
62 * block that contanis all valid values in this block (set_store()). This
63 * datastructure is used to build the Phi nodes and removed after
64 * completion of the graph. There is no path from end to start in the
65 * graph after calling ir_graph.
66 * pinned set to "pinned" if no global cse was performed on the graph.
67 * set to "floats" if global cse was performed (and during construction:
68 * did actually change something). Code placement is necessary.
71 /* Global variable holding the current_ir_graph. This global variable
72 is used by the ir construction interface in ircons and by the
74 extern ir_graph *current_ir_graph;
75 ir_graph *get_current_ir_graph();
76 void set_current_ir_graph(ir_graph *graph);
78 /** This flag indicate the current view. The behaviour of some methods
79 * (get_irn_*, set_irn_*) is influenced by this flag. */
80 extern bool interprocedural_view;
81 bool get_interprocedural_view();
82 void set_interprocedural_view(bool state);
84 /** Create a new ir graph to built ir for a procedure.
85 ent is the entity representing this procedure, i.e., the type of the
86 entity must be of a method type. The constructor automatically sets the
87 field irg of the entity as well as current_ir_graph to the new ir graph.
88 n_loc is the number of local variables in this procedure including
89 the procedure parameters.
90 The state of the ir graph is: phase_building, pinned, no_outs. */
91 ir_graph *new_ir_graph (entity *ent, int n_loc);
93 /** Frees the passed irgraph.
94 Deallocates all nodes in this graph and the ir_graph structure.
95 Sets the field irgraph in the corresponding entity to NULL.
96 Does not remove the irgraph from the list in irprog (requires
97 inefficient search, call remove_irp_irg by hand).
98 Does not free types, entities or modes that are used only by this
99 graph, nor the entity standing for this graph. */
100 void free_ir_graph (ir_graph *irg);
102 /* --- access routines for all ir_graph attributes --- */
103 entity *get_irg_ent (ir_graph *irg);
104 void set_irg_ent (ir_graph *irg, entity *ent);
106 type *get_irg_frame_type (ir_graph *irg);
107 void set_irg_frame_type (ir_graph *irg, type *ftp);
108 /* To test for a frame type */
109 int is_frame_type(type *ftp);
111 ir_node *get_irg_start_block (ir_graph *irg);
112 void set_irg_start_block (ir_graph *irg, ir_node *node);
114 ir_node *get_irg_start (ir_graph *irg);
115 void set_irg_start (ir_graph *irg, ir_node *node);
117 ir_node *get_irg_end_block (ir_graph *irg);
118 void set_irg_end_block (ir_graph *irg, ir_node *node);
120 ir_node *get_irg_end (ir_graph *irg);
121 void set_irg_end (ir_graph *irg, ir_node *node);
123 /* @@@ oblivious, no more supported. */
124 ir_node *get_irg_cstore (ir_graph *irg);
125 void set_irg_cstore (ir_graph *irg, ir_node *node);
128 ir_node *get_irg_frame (ir_graph *irg);
129 void set_irg_frame (ir_graph *irg, ir_node *node);
131 ir_node *get_irg_globals (ir_graph *irg);
132 void set_irg_globals (ir_graph *irg, ir_node *node);
134 ir_node *get_irg_args (ir_graph *irg);
135 void set_irg_args (ir_graph *irg, ir_node *node);
137 ir_node *get_irg_current_block (ir_graph *irg);
138 void set_irg_current_block (ir_graph *irg, ir_node *node);
140 /* Use new_Bad() instead!! */
141 ir_node *get_irg_bad (ir_graph *irg);
142 void set_irg_bad (ir_graph *irg, ir_node *node);
144 /* Use new_Unknown() instead!! */
145 ir_node *get_irg_unknown (ir_graph *irg);
146 void set_irg_unknown (ir_graph *irg, ir_node *node);
148 int get_irg_n_locs (ir_graph *irg);
150 /********************************************************************************/
151 /* States of an ir_graph. */
152 /********************************************************************************/
155 information associated with the graph. Optimizations invalidate these
158 /** state: phase values: phase_building, phase_high, phase_low.
159 The irg is in phase_building during construction of the irgraph. It is in
160 phase_high after construction. All nodes are allowed. To get the irgraph
161 into phase_low all Sel nodes must be removed and replaced by explicit
162 address computations. SymConst size and typetag nodes must be removed (@@@
163 really?). Initialization of memory allocated by Alloc must be explicit.
164 @@@ More conditions? */
171 irg_phase_state get_irg_phase_state (ir_graph *irg);
172 void set_irg_phase_low(ir_graph *irg);
175 The graph is "pinned" if all nodes are associated with a basic block.
176 It is in state "floats" if nodes are in arbitrary blocks. In state
177 "floats" the block predecessor is set in all nodes, but this can be an
178 invalid block, i.e., the block is not a dominator of all the uses of
180 The enum op_pinned is defined in irop.h. */
181 op_pinned get_irg_pinned (ir_graph *irg);
183 /** state: outs_state
184 Outs are the back edges or def-use edges.
185 Values: no_outs, outs_consistent, outs_inconsistent
186 no_outs: outs are not computed, no memory is allocated.
187 outs_consistent: outs are computed and correct,
188 outs_inconsistent: outs have been computed, memory is still allocated,
189 but the graph has been changed since. */
195 irg_outs_state get_irg_outs_state(ir_graph *irg);
196 void set_irg_outs_inconsistent(ir_graph *irg);
199 Signals the state of the dominator infomation.
200 Values: no_dom, dom_consistent, dom_inconsistent
201 no_dom: doms are not computed, no memory is allocated. The access routines
203 dom_consistent: dominator information is computed and correct,
204 dom_inconsistent: dominator information is computed, memory is still allocated,
205 but the graph has been changed since. Using the access routines is possible,
206 obtained information may be incorrect. */
212 irg_dom_state get_irg_dom_state(ir_graph *irg);
213 void set_irg_dom_inconsistent(ir_graph *irg);
215 /* state: loopinfo_state
216 Loop information describes the loops within the control and
217 data flow of the procedure.
218 tpedef enum { @@@ make unrecognizable for jni script!!!
221 loopinfo_inconsistent
222 } irg_loopinfo_state;
223 irg_loopinfo_state get_irg_loopinfo_state(ir_graph *irg);
224 void set_irg_loopinfo_inconsistent(ir_graph *irg);
227 /* A void * field to link arbritary information to the node. */
228 void set_irg_link (ir_graph *irg, void *thing);
229 void *get_irg_link (ir_graph *irg);
231 /* increments visited by one */
232 void inc_irg_visited(ir_graph *irg);
233 unsigned long get_irg_visited (ir_graph *irg);
234 void set_irg_visited(ir_graph *irg, unsigned long i);
235 unsigned long get_max_irg_visited(void);
236 void set_max_irg_visited(int val);
237 unsigned long inc_max_irg_visited(void);
239 /* increments block_visited by one */
240 void inc_irg_block_visited(ir_graph *irg);
241 unsigned long get_irg_block_visited (ir_graph *irg);
242 void set_irg_block_visited(ir_graph *irg, unsigned long i);
244 # endif /* _IRGRAPH_H_ */