- current_ir_graph = res;
- res->n_loc = 1; /* Only the memory. */
- res->visited = 0; /* visited flag, for the ir walker */
- res->block_visited=0; /* visited flag, for the 'block'-walker */
-#if USE_EXPLICIT_PHI_IN_STACK
- res->Phi_in_stack = NULL;
-#endif
- res->kind = k_ir_graph;
- res->obst = (struct obstack *) xmalloc (sizeof (struct obstack));
- obstack_init (res->obst);
- res->phase_state = phase_building;
- res->op_pin_state_pinned = op_pin_state_pinned;
- res->value_table = new_identities (); /* value table for global value
- numbering for optimizing use in
- iropt.c */
- res->ent = NULL;
- res->frame_type = NULL;
-
- /* -- The end block -- */
- res->end_block = new_immBlock ();
- res->end = new_End ();
- res->end_reg = res->end;
- res->end_except = res->end;
- mature_immBlock(get_cur_block()); /* mature the end block */
-
- /* -- The start block -- */
- res->start_block = new_immBlock ();
- res->bad = new_ir_node (NULL, res, res->start_block, op_Bad, mode_T, 0, NULL);
- res->no_mem = new_ir_node (NULL, res, res->start_block, op_NoMem, mode_M, 0, NULL);
- res->start = new_Start ();
- /* Proj results of start node */
- res->initial_mem = new_Proj (res->start, mode_M, pn_Start_M);
- projX = new_Proj (res->start, mode_X, pn_Start_X_initial_exec);
- add_immBlock_pred (res->start_block, projX);
- mature_immBlock (res->start_block); /* mature the start block */
-
- add_immBlock_pred (new_immBlock (), projX);
- mature_immBlock (get_cur_block()); /* mature the 'body' block for expressions */
-
- /* Set the visited flag high enough that the blocks will never be visited. */
- set_irn_visited(get_cur_block(), -1);
- set_Block_block_visited(get_cur_block(), -1);
- set_Block_block_visited(res->start_block, -1);
- set_irn_visited(res->start_block, -1);
- set_irn_visited(res->bad, -1);
- set_irn_visited(res->no_mem, -1);
-
- res->phase_state = phase_high;
- return res;
-}
-
-/* Defined in iropt.c */
-void del_identities (pset *value_table);
-
-/* 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) {
-
- stat_free_graph(irg);
- if (irg->outs_state != outs_none) free_outs(irg);
- if (irg->frame_type) free_type(irg->frame_type);
- if (irg->value_table) del_identities(irg->value_table);
- if (irg->ent) {
- peculiarity pec = get_entity_peculiarity (irg->ent);
- set_entity_peculiarity (irg->ent, peculiarity_description);
- set_entity_irg(irg->ent, NULL); /* not set in const code irg */
- set_entity_peculiarity (irg->ent, pec);
- }
-
- free_End(irg->end);
- obstack_free(irg->obst,NULL);
- free(irg->obst);
-#if USE_EXPLICIT_PHI_IN_STACK
- free_Phi_in_stack(irg->Phi_in_stack);
-#endif
- irg->kind = k_BAD;
- free(irg);
-}
+ res->last_node_idx = 0;
+
+ res->phase_state = phase_building;
+ res->irg_pinned_state = op_pin_state_pinned;
+ res->fp_model = fp_model_precise;
+
+ /* value table for global value numbering for optimizing use in iropt.c */
+ new_identities(res);
+ res->ent = NULL;
+ res->frame_type = NULL;
+
+ /* the Anchor node must be created first */
+ res->anchor = new_r_Anchor(res);
+
+ /* -- The end block -- */
+ end_block = new_r_Block_noopt(res, 0, NULL);
+ set_irg_end_block(res, end_block);
+ end = new_r_End(res, 0, NULL);
+ set_irg_end(res, end);
+
+ /* -- The start block -- */
+ start_block = new_r_Block_noopt(res, 0, NULL);
+ set_irg_start_block(res, start_block);
+ no_mem = new_r_NoMem(res);
+ set_irg_no_mem(res, no_mem);
+ start = new_r_Start(res);
+ set_irg_start(res, start);
+
+ /* Proj results of start node */
+ set_irg_initial_mem(res, new_r_Proj(start, mode_M, pn_Start_M));
+ projX = new_r_Proj(start, mode_X, pn_Start_X_initial_exec);