X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firgraph.c;h=d93b2d99e5f25798eb52b9b4277fccd75880c25f;hb=f8cc15664f571aa7ef89d6f6bc8d5bd2b8ca7d53;hp=52fcfa2b995e46aef38462cc91fe2764783f3d94;hpb=1ec30d95387eb392ba5a1adc7958ebd91383d59c;p=libfirm

diff --git a/ir/ir/irgraph.c b/ir/ir/irgraph.c
index 52fcfa2b9..d93b2d99e 100644
--- a/ir/ir/irgraph.c
+++ b/ir/ir/irgraph.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 1995-2007 University of Karlsruhe.  All right reserved.
+ * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
  *
  * This file is part of libFirm.
  *
@@ -21,23 +21,17 @@
  * @file
  * @brief    Entry point to the representation of procedure code.
  * @author   Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Michael Beck
- * @version  $Id$
  */
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
+#include "config.h"
 
-#ifdef HAVE_STRING_H
-# include <string.h>
-#endif
-#ifdef HAVE_STDDEF_H
-# include <stddef.h>
-#endif
+#include <string.h>
+#include <stddef.h>
 
 #include "xmalloc.h"
-#include "ircons.h"
+#include "ircons_t.h"
 #include "irgraph_t.h"
 #include "irprog_t.h"
+#include "irgraph_t.h"
 #include "irnode_t.h"
 #include "iropt_t.h"
 #include "irflag_t.h"
@@ -46,7 +40,9 @@
 #include "irouts.h"
 #include "irhooks.h"
 #include "irtools.h"
+#include "util.h"
 #include "irgwalk.h"
+#include "irbackedge_t.h"
 #include "iredges_t.h"
 #include "type_t.h"
 #include "irmemory.h"
@@ -66,41 +62,24 @@ static int forbid_new_data = 0;
 static size_t additional_graph_data_size = 0;
 
 ir_graph *current_ir_graph;
-ir_graph *get_current_ir_graph(void) {
-  return current_ir_graph;
-}
-void set_current_ir_graph(ir_graph *graph) {
-  current_ir_graph = graph;
-}
-
-
-int firm_interprocedural_view = 0;
-
-int (get_interprocedural_view)(void) {
-  return _get_interprocedural_view();
+ir_graph *get_current_ir_graph(void)
+{
+	return current_ir_graph;
 }
 
-void (set_interprocedural_view)(int state) {
-  firm_interprocedural_view = state;
-
-  /* set function vectors for faster access */
-  if (state) {
-    _get_irn_arity = _get_irn_inter_arity;
-    _get_irn_n     = _get_irn_inter_n;
-  }
-  else {
-    _get_irn_arity = _get_irn_intra_arity;
-    _get_irn_n     = _get_irn_intra_n;
-  }
+void set_current_ir_graph(ir_graph *graph)
+{
+	current_ir_graph = graph;
 }
 
 /** contains the suffix for frame type names */
 static ident *frame_type_suffix = NULL;
 
 /* initialize the IR graph module */
-void firm_init_irgraph(void) {
-  frame_type_suffix = new_id_from_str(FRAME_TP_SUFFIX);
-  forbid_new_data   = 1;
+void firm_init_irgraph(void)
+{
+	frame_type_suffix = new_id_from_str(FRAME_TP_SUFFIX);
+	forbid_new_data   = 1;
 }
 
 /**
@@ -110,31 +89,59 @@ void firm_init_irgraph(void) {
  * allocated (new_r_ir_graph, new_const_code_irg).
  * @return Memory for a new graph.
  */
-static ir_graph *alloc_graph(void) {
-  size_t size = sizeof(ir_graph) + additional_graph_data_size;
-  char *ptr = xmalloc(size);
-  memset(ptr, 0, size);
+static ir_graph *alloc_graph(void)
+{
+	ir_graph *res;
+	size_t   size = sizeof(ir_graph) + additional_graph_data_size;
+	char     *ptr = XMALLOCNZ(char, size);
 
-  return (ir_graph *) (ptr + additional_graph_data_size);
+	res = (ir_graph *)(ptr + additional_graph_data_size);
+	res->kind = k_ir_graph;
+
+	/* initialize the idx->node map. */
+	res->idx_irn_map = NEW_ARR_F(ir_node *, INITIAL_IDX_IRN_MAP_SIZE);
+	memset(res->idx_irn_map, 0, INITIAL_IDX_IRN_MAP_SIZE * sizeof(res->idx_irn_map[0]));
+
+	return res;
 }
 
 /**
  * Frees an allocated IR graph
  */
-static void free_graph(ir_graph *irg) {
-  char *ptr = (char *)irg;
-  free(ptr - additional_graph_data_size);
+static void free_graph(ir_graph *irg)
+{
+	char           *ptr = (char *)irg;
+	ir_edge_kind_t  i;
+
+	for (i = EDGE_KIND_FIRST; i < EDGE_KIND_LAST; ++i)
+		edges_deactivate_kind(irg, i);
+	DEL_ARR_F(irg->idx_irn_map);
+	free(ptr - additional_graph_data_size);
 }
 
-#if USE_EXPLICIT_PHI_IN_STACK
-/* really defined in ircons.c */
-typedef struct Phi_in_stack Phi_in_stack;
-Phi_in_stack *new_Phi_in_stack();
-void free_Phi_in_stack(Phi_in_stack *s);
-#endif
+/**
+ * Set the number of locals for a given graph.
+ *
+ * @param irg    the graph
+ * @param n_loc  number of locals
+ */
+void irg_set_nloc(ir_graph *res, int n_loc)
+{
+	assert(res->phase_state == phase_building);
+
+	res->n_loc = n_loc + 1;     /* number of local variables that are never
+	                               dereferenced in this graph plus one for
+	                               the store. This is not the number of
+	                               parameters to the procedure!  */
+
+	if (res->loc_descriptions) {
+		xfree(res->loc_descriptions);
+		res->loc_descriptions = NULL;
+	}
+}
 
 /* Allocates a list of nodes:
-    - The start block containing a start node and Proj nodes for it's four
+    - The start block containing a start node and Proj nodes for its four
       results (X, M, P, Tuple).
     - The end block containing an end node. This block is not matured after
       new_ir_graph as predecessors need to be added to it.
@@ -142,812 +149,691 @@ void free_Phi_in_stack(Phi_in_stack *s);
    Further it allocates several datastructures needed for graph construction
    and optimization.
 */
-ir_graph *
-new_r_ir_graph (ir_entity *ent, int n_loc)
-{
-  ir_graph *res;
-  ir_node  *first_block;
-  ir_node  *end, *start, *start_block, *initial_mem, *projX;
-
-  res = alloc_graph();
-  res->kind = k_ir_graph;
-
-  //edges_init_graph_kind(res, EDGE_KIND_NORMAL);
-  //edges_init_graph_kind(res, EDGE_KIND_BLOCK);
-
-  /* initialize the idx->node map. */
-  res->idx_irn_map = NEW_ARR_F(ir_node *, INITIAL_IDX_IRN_MAP_SIZE);
-  memset(res->idx_irn_map, 0, INITIAL_IDX_IRN_MAP_SIZE * sizeof(res->idx_irn_map[0]));
-
-  /* inform statistics here, as blocks will be already build on this graph */
-  hook_new_graph(res, ent);
-
-  current_ir_graph = res;
-
-  /*-- initialized for each graph. --*/
-  if (get_opt_precise_exc_context()) {
-    res->n_loc = n_loc + 1 + 1; /* number of local variables that are never
-                   dereferenced in this graph plus one for
-                   the store plus one for links to fragile
-                   operations.  n_loc is not the number of
-                   parameters to the procedure!  */
-  }
-  else {
-    res->n_loc = n_loc + 1;  /* number of local variables that are never
-                dereferenced in this graph plus one for
-                the store. This is not the number of parameters
-                to the procedure!  */
-  }
-
-  /* descriptions will be allocated on demand */
-  res->loc_descriptions = NULL;
-
-  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 = new_Phi_in_stack();  /* A stack needed for automatic Phi
-                                generation */
-#endif
-  res->kind = k_ir_graph;
-  res->obst = xmalloc (sizeof(*res->obst));
-  obstack_init(res->obst);
-  res->extbb_obst = NULL;
-
-  res->last_node_idx = 0;
-
-  res->value_table = new_identities (); /* value table for global value
-                       numbering for optimizing use in
-                       iropt.c */
-  res->outs = NULL;
-
-  res->inline_property       = irg_inline_any;
-  res->additional_properties = mtp_property_inherited;  /* inherited from type */
-
-  res->phase_state         = phase_building;
-  res->irg_pinned_state    = op_pin_state_pinned;
-  res->outs_state          = outs_none;
-  res->dom_state           = dom_none;
-  res->pdom_state          = dom_none;
-  res->typeinfo_state      = ir_typeinfo_none;
-  set_irp_typeinfo_inconsistent();           /* there is a new graph with typeinfo_none. */
-  res->callee_info_state   = irg_callee_info_none;
-  res->loopinfo_state      = loopinfo_none;
-  res->class_cast_state    = ir_class_casts_transitive;
-  res->extblk_state        = ir_extblk_info_none;
-  res->execfreq_state      = exec_freq_none;
-  res->fp_model            = fp_model_precise;
-  res->adr_taken_state     = ir_address_taken_not_computed;
-  res->mem_disambig_opt    = aa_opt_inherited;
-
-  /*-- Type information for the procedure of the graph --*/
-  res->ent = ent;
-  set_entity_irg(ent, res);
-
-  /*--  a class type so that it can contain "inner" methods as in Pascal. --*/
-  res->frame_type = new_type_frame(mangle(get_entity_ident(ent), frame_type_suffix));
-
-  /*-- Nodes needed in every graph --*/
-  set_irg_end_block (res, new_immBlock());
-  end               = new_End();
-  set_irg_end       (res, end);
-  set_irg_end_reg   (res, end);
-  set_irg_end_except(res, end);
-
-  start_block = new_immBlock();
-  set_irg_start_block(res, start_block);
-  set_irg_bad        (res, new_ir_node(NULL, res, start_block, op_Bad, mode_T, 0, NULL));
-  set_irg_no_mem     (res, new_ir_node(NULL, res, start_block, op_NoMem, mode_M, 0, NULL));
-  start = new_Start();
-  set_irg_start      (res, start);
-
-  /* Proj results of start node */
-  projX                   = new_Proj(start, mode_X, pn_Start_X_initial_exec);
-  set_irg_frame           (res, new_Proj(start, mode_P_data, pn_Start_P_frame_base));
-  set_irg_globals         (res, new_Proj(start, mode_P_data, pn_Start_P_globals));
-  set_irg_tls             (res, new_Proj(start, mode_P_data, pn_Start_P_tls));
-  set_irg_args            (res, new_Proj(start, mode_T,      pn_Start_T_args));
-  set_irg_value_param_base(res, new_Proj(start, mode_P_data, pn_Start_P_value_arg_base));
-  initial_mem             = new_Proj(start, mode_M, pn_Start_M);
-  set_irg_initial_mem(res, initial_mem);
-
-  add_immBlock_pred(start_block, projX);
-  set_store(initial_mem);
+ir_graph *new_r_ir_graph(ir_entity *ent, int n_loc)
+{
+	ir_graph *res;
+	ir_node  *first_block;
+	ir_node  *start, *start_block, *initial_mem, *projX;
 
-#ifdef DEBUG_libfirm
-  res->graph_nr    = get_irp_new_node_nr();
-#endif
-  res->proj_args   = NULL;
+	res = alloc_graph();
 
-  /*
-   * The code generation needs it. leave it in now.
-   * Use of this edge is matter of discussion, unresolved. Also possible:
-   * add_immBlock_pred(res->start_block, res->start_block), but invalid typed.
-   */
-  mature_immBlock(res->current_block);
+	/* inform statistics here, as blocks will be already build on this graph */
+	hook_new_graph(res, ent);
 
-  /*-- Make a block to start with --*/
-  first_block = new_immBlock();
-  add_immBlock_pred(first_block, projX);
+	/*-- initialized for each graph. --*/
+	res->kind = k_ir_graph;
+	res->obst = XMALLOC(struct obstack);
+	obstack_init(res->obst);
 
-  res->method_execution_frequency = -1;
-  res->estimated_node_count       = 0;
+	res->phase_state = phase_building;
+	irg_set_nloc(res, n_loc);
 
-  return res;
-}
+	/* descriptions will be allocated on demand */
+	res->loc_descriptions = NULL;
 
+	res->visited       = 0; /* visited flag, for the ir walker */
+	res->block_visited = 0; /* visited flag, for the 'block'-walker */
 
-ir_graph *
-new_ir_graph(ir_entity *ent, int n_loc)
-{
-  ir_graph *res = new_r_ir_graph(ent, n_loc);
-  add_irp_irg(res);          /* remember this graph global. */
-  return res;
-}
+	res->extbb_obst = NULL;
 
-/* Make a rudimentary IR graph for the constant code.
-   Must look like a correct irg, spare everything else. */
-ir_graph *new_const_code_irg(void) {
-  ir_graph *res;
-  ir_node  *end, *start_block, *start, *projX;
+	res->last_node_idx = 0;
 
-  res = alloc_graph();
+	new_identities(res);
+	res->outs = NULL;
 
-  /* initialize the idx->node map. */
-  res->idx_irn_map = NEW_ARR_F(ir_node *, INITIAL_IDX_IRN_MAP_SIZE);
-  memset(res->idx_irn_map, 0, INITIAL_IDX_IRN_MAP_SIZE * sizeof(res->idx_irn_map[0]));
+	res->inline_property       = irg_inline_any;
+	res->additional_properties = mtp_property_inherited;  /* inherited from type */
 
-  /* inform statistics here, as blocks will be already build on this graph */
-  hook_new_graph(res, NULL);
+	res->irg_pinned_state    = op_pin_state_pinned;
+	res->typeinfo_state      = ir_typeinfo_none;
+	set_irp_typeinfo_inconsistent();           /* there is a new graph with typeinfo_none. */
+	res->callee_info_state   = irg_callee_info_none;
+	res->class_cast_state    = ir_class_casts_transitive;
+	res->fp_model            = fp_model_precise;
+	res->mem_disambig_opt    = aa_opt_inherited;
 
-  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      = xmalloc (sizeof(*res->obst));
-  obstack_init (res->obst);
-  res->extbb_obst = NULL;
-
-  res->last_node_idx = 0;
-
-  res->phase_state      = phase_building;
-  res->irg_pinned_state = op_pin_state_pinned;
-  res->extblk_state     = ir_extblk_info_none;
-  res->fp_model         = fp_model_precise;
-
-  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 -- */
-  set_irg_end_block (res, new_immBlock());
-  end = new_End();
-  set_irg_end       (res, end);
-  set_irg_end_reg   (res, end);
-  set_irg_end_except(res, end);
-  mature_immBlock(get_cur_block());  /* mature the end block */
-
-  /* -- The start block -- */
-  start_block        = new_immBlock();
-  set_irg_start_block(res, start_block);
-  set_irg_bad        (res, new_ir_node (NULL, res, start_block, op_Bad, mode_T, 0, NULL));
-  set_irg_no_mem     (res, new_ir_node (NULL, res, start_block, op_NoMem, mode_M, 0, NULL));
-  start              = new_Start();
-  set_irg_start      (res, start);
-
-  /* Proj results of start node */
-  set_irg_initial_mem(res, new_Proj(start, mode_M, pn_Start_M));
-  projX = new_Proj(start, mode_X, pn_Start_X_initial_exec);
-  add_immBlock_pred(start_block, projX);
-  mature_immBlock  (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(start_block, -1);
-  set_irn_visited(start_block, -1);
-  set_irn_visited(get_irg_bad(res), -1);
-  set_irn_visited(get_irg_no_mem(res), -1);
-
-  res->phase_state = phase_high;
-
-  return res;
-}
-
-/* Defined in iropt.c */
-void  del_identities (pset *value_table);
+	/*-- Type information for the procedure of the graph --*/
+	res->ent = ent;
+	set_entity_irg(ent, res);
 
-/* 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) {
-  assert(is_ir_graph(irg));
-
-  hook_free_graph(irg);
-  if (irg->outs_state != outs_none) free_irg_outs(irg);
-  if (irg->frame_type)  free_type(irg->frame_type);
-  if (irg->value_table) del_identities(irg->value_table);
-  if (irg->ent) {
-    ir_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(get_irg_end(irg));
-  obstack_free(irg->obst,NULL);
-  free(irg->obst);
-#if USE_EXPLICIT_PHI_IN_STACK
-  free_Phi_in_stack(irg->Phi_in_stack);
-#endif
-  if (irg->loc_descriptions)
-    free(irg->loc_descriptions);
-  irg->kind = k_BAD;
-  free_graph(irg);
-}
+	/*--  a class type so that it can contain "inner" methods as in Pascal. --*/
+	res->frame_type = new_type_frame();
 
-/* access routines for all ir_graph attributes:
-   templates:
-   {attr type} get_irg_{attribute name} (ir_graph *irg);
-   void set_irg_{attr name} (ir_graph *irg, {attr type} {attr}); */
+	/* the Anchor node must be created first */
+	res->anchor = new_r_Anchor(res);
 
-int
-(is_ir_graph)(const void *thing) {
-  return _is_ir_graph(thing);
-}
+	/*-- Nodes needed in every graph --*/
+	set_irg_end_block (res, new_r_immBlock(res));
+	set_irg_end(res, new_r_End(res, 0, NULL));
 
-/* Outputs a unique number for this node */
-long get_irg_graph_nr(ir_graph *irg) {
-  assert(irg);
+	start_block = new_r_Block_noopt(res, 0, NULL);
+	set_irg_start_block(res, start_block);
+	set_irg_no_mem     (res, new_r_NoMem(res));
+	start = new_r_Start(res);
+	set_irg_start      (res, start);
+
+	/* Proj results of start node */
+	projX                   = new_r_Proj(start, mode_X, pn_Start_X_initial_exec);
+	set_irg_initial_exec    (res, projX);
+	set_irg_frame           (res, new_r_Proj(start, mode_P_data, pn_Start_P_frame_base));
+	set_irg_args            (res, new_r_Proj(start, mode_T,      pn_Start_T_args));
+	initial_mem             = new_r_Proj(start, mode_M, pn_Start_M);
+	set_irg_initial_mem(res, initial_mem);
+
+	res->index       = get_irp_new_irg_idx();
 #ifdef DEBUG_libfirm
-  return irg->graph_nr;
-#else
-  return (long)PTR_TO_INT(irg);
+	res->graph_nr    = get_irp_new_node_nr();
 #endif
-}
 
-ir_node *
-(get_irg_start_block)(const ir_graph *irg) {
-  return _get_irg_start_block(irg);
-}
+	set_r_cur_block(res, start_block);
+	set_r_store(res, initial_mem);
 
-void
-(set_irg_start_block)(ir_graph *irg, ir_node *node) {
-  _set_irg_start_block(irg, node);
-}
+	/*-- Make a block to start with --*/
+	first_block = new_r_immBlock(res);
+	set_r_cur_block(res, first_block);
+	add_immBlock_pred(first_block, projX);
 
-ir_node *
-(get_irg_start)(const ir_graph *irg) {
-  return _get_irg_start(irg);
-}
+	res->method_execution_frequency = -1.0;
+	res->estimated_node_count       = 0;
 
-void
-(set_irg_start)(ir_graph *irg, ir_node *node) {
-  _set_irg_start(irg, node);
+	return res;
 }
 
-ir_node *
-(get_irg_end_block)(const ir_graph *irg) {
-  return _get_irg_end_block(irg);
+ir_graph *new_ir_graph(ir_entity *ent, int n_loc)
+{
+	ir_graph *res = new_r_ir_graph(ent, n_loc);
+	add_irp_irg(res);          /* remember this graph global. */
+	return res;
 }
 
-void
-(set_irg_end_block)(ir_graph *irg, ir_node *node) {
-  _set_irg_end_block(irg, node);
+/* Make a rudimentary IR graph for the constant code.
+   Must look like a correct irg, spare everything else. */
+ir_graph *new_const_code_irg(void)
+{
+	ir_graph *res = alloc_graph();
+	ir_node  *body_block;
+	ir_node  *end;
+	ir_node  *end_block;
+	ir_node  *no_mem;
+	ir_node  *projX;
+	ir_node  *start_block;
+	ir_node  *start;
+
+	/* inform statistics here, as blocks will be already build on this graph */
+	hook_new_graph(res, NULL);
+
+	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 */
+	res->obst          = XMALLOC(struct obstack);
+	obstack_init(res->obst);
+	res->extbb_obst = NULL;
+
+	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);
+
+	body_block = new_r_Block(res, 1, &projX);
+
+	set_r_cur_block(res, body_block);
+
+	/* Set the visited flag high enough that the blocks will never be visited. */
+	set_irn_visited(body_block, -1);
+	set_Block_block_visited(body_block, -1);
+	set_Block_block_visited(start_block, -1);
+	set_irn_visited(start_block, -1);
+	set_irn_visited(no_mem, -1);
+
+	return res;
 }
 
-ir_node *
-(get_irg_end)(const ir_graph *irg) {
-  return _get_irg_end(irg);
-}
+/**
+ * Pre-Walker: Copies blocks and nodes from the original method graph
+ * to the copied graph.
+ *
+ * @param n    A node from the original method graph.
+ * @param env  The copied graph.
+ */
+static void copy_all_nodes(ir_node *node, void *env)
+{
+	ir_graph *irg      = (ir_graph*)env;
+	ir_node  *new_node = irn_copy_into_irg(node, irg);
 
-void
-(set_irg_end)(ir_graph *irg, ir_node *node) {
-  _set_irg_end(irg, node);
-}
+	set_irn_link(node, new_node);
 
-ir_node *
-(get_irg_end_reg)(const ir_graph *irg) {
-  return _get_irg_end_reg(irg);
-}
+	/* fix access to entities on the stack frame */
+	if (is_Sel(new_node)) {
+		ir_entity *ent = get_Sel_entity(new_node);
+		ir_type   *tp  = get_entity_owner(ent);
 
-void     set_irg_end_reg (ir_graph *irg, ir_node *node) {
-  assert(get_irn_op(node) == op_EndReg || get_irn_op(node) == op_End);
-  irg->anchors[anchor_end_reg] = node;
-}
+		if (is_frame_type(tp)) {
+			/* replace by the copied entity */
+			ent = (ir_entity*)get_entity_link(ent);
 
-ir_node *
-(get_irg_end_except)(const ir_graph *irg) {
-  return _get_irg_end_except(irg);
+			assert(is_entity(ent));
+			assert(get_entity_owner(ent) == get_irg_frame_type(irg));
+			set_Sel_entity(new_node, ent);
+		}
+	}
 }
 
-void     set_irg_end_except (ir_graph *irg, ir_node *node) {
-  assert(get_irn_op(node) == op_EndExcept || get_irn_op(node) == op_End);
-  irg->anchors[anchor_end_except] = node;
+/**
+ * Post-walker: Set the predecessors of the copied nodes.
+ * The copied nodes are set as link of their original nodes. The links of
+ * "irn" predecessors are the predecessors of copied node.
+ */
+static void rewire(ir_node *irn, void *env)
+{
+	(void) env;
+	irn_rewire_inputs(irn);
 }
 
-ir_node *
-(get_irg_frame)(const ir_graph *irg) {
-  return _get_irg_frame(irg);
+static ir_node *get_new_node(const ir_node *old_node)
+{
+	return (ir_node*) get_irn_link(old_node);
 }
 
-void
-(set_irg_frame)(ir_graph *irg, ir_node *node) {
-  _set_irg_frame(irg, node);
-}
+/*
+ * Create a new graph that is a copy of a given one.
+ */
+ir_graph *create_irg_copy(ir_graph *irg)
+{
+	ir_graph *res;
 
-ir_node *
-(get_irg_globals)(const ir_graph *irg) {
-  return _get_irg_globals(irg);
-}
+	res = alloc_graph();
 
-void
-(set_irg_globals)(ir_graph *irg, ir_node *node) {
-  _set_irg_globals(irg, node);
-}
+	res->n_loc = 0;
+	res->visited = 0;       /* visited flag, for the ir walker */
+	res->block_visited = 0; /* visited flag, for the 'block'-walker */
+	res->obst       = XMALLOC(struct obstack);
+	obstack_init(res->obst);
+	res->extbb_obst = NULL;
 
-ir_node *
-(get_irg_tls)(const ir_graph *irg) {
-  return _get_irg_tls(irg);
-}
+	res->last_node_idx = 0;
 
-void
-(set_irg_tls)(ir_graph *irg, ir_node *node) {
-  _set_irg_tls(irg, node);
-}
+	res->phase_state      = irg->phase_state;
+	res->irg_pinned_state = irg->irg_pinned_state;
+	res->fp_model         = irg->fp_model;
 
-ir_node *
-(get_irg_initial_mem)(const ir_graph *irg) {
-  return _get_irg_initial_mem(irg);
-}
+	new_identities(res);
 
-void
-(set_irg_initial_mem)(ir_graph *irg, ir_node *node) {
-  _set_irg_initial_mem(irg, node);
-}
+	/* clone the frame type here for safety */
+	irp_reserve_resources(irp, IRP_RESOURCE_ENTITY_LINK);
+	res->frame_type  = clone_frame_type(irg->frame_type);
 
-ir_node *
-(get_irg_args)(const ir_graph *irg) {
-  return _get_irg_args(irg);
-}
+	res->phase_state = irg->phase_state;
 
-void
-(set_irg_args)(ir_graph *irg, ir_node *node) {
-  _set_irg_args(irg, node);
-}
+	ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK);
 
-ir_node *
-(get_irg_value_param_base)(const ir_graph *irg) {
-  return _get_irg_value_param_base(irg);
-}
+	/* copy all nodes from the graph irg to the new graph res */
+	irg_walk_anchors(irg, copy_all_nodes, rewire, res);
 
-void
-(set_irg_value_param_base)(ir_graph *irg, ir_node *node) {
-  _set_irg_value_param_base(irg, node);
-}
+	/* copy the Anchor node */
+	res->anchor = get_new_node(irg->anchor);
 
-ir_node **
-(get_irg_proj_args) (const ir_graph *irg) {
-  return _get_irg_proj_args (irg);
-}
+	/* -- The end block -- */
+	set_irg_end_block (res, get_new_node(get_irg_end_block(irg)));
+	set_irg_end       (res, get_new_node(get_irg_end(irg)));
 
-void
-(set_irg_proj_args) (ir_graph *irg, ir_node **nodes) {
-  _set_irg_proj_args (irg, nodes);
-}
+	/* -- The start block -- */
+	set_irg_start_block(res, get_new_node(get_irg_start_block(irg)));
+	set_irg_no_mem     (res, get_new_node(get_irg_no_mem(irg)));
+	set_irg_start      (res, get_new_node(get_irg_start(irg)));
 
-ir_node *
-(get_irg_bad)(const ir_graph *irg) {
-  return _get_irg_bad(irg);
-}
+	/* Proj results of start node */
+	set_irg_initial_mem(res, get_new_node(get_irg_initial_mem(irg)));
 
-void
-(set_irg_bad)(ir_graph *irg, ir_node *node) {
-  _set_irg_bad(irg, node);
-}
+	/* Copy the node count estimation. Would be strange if this
+	   is different from the original one. */
+	res->estimated_node_count = irg->estimated_node_count;
+
+	ir_free_resources(irg, IR_RESOURCE_IRN_LINK);
+	irp_free_resources(irp, IRP_RESOURCE_ENTITY_LINK);
 
-ir_node *
-(get_irg_no_mem)(const ir_graph *irg) {
-  return _get_irg_no_mem(irg);
+	return res;
 }
 
-void
-(set_irg_no_mem)(ir_graph *irg, ir_node *node) {
-  _set_irg_no_mem(irg, node);
+/* 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)
+{
+	assert(is_ir_graph(irg));
+
+	edges_deactivate(irg);
+
+	hook_free_graph(irg);
+	free_irg_outs(irg);
+	if (irg->frame_type)
+		free_type(irg->frame_type);
+	del_identities(irg);
+	if (irg->ent) {
+		set_entity_irg(irg->ent, NULL);  /* not set in const code irg */
+	}
+
+	free_End(get_irg_end(irg));
+	obstack_free(irg->obst,NULL);
+	free(irg->obst);
+	if (irg->loc_descriptions)
+		free(irg->loc_descriptions);
+	irg->kind = k_BAD;
+	free_graph(irg);
 }
 
-ir_node *
-(get_irg_current_block)(const ir_graph *irg) {
-  return _get_irg_current_block(irg);
+/* access routines for all ir_graph attributes:
+   templates:
+   {attr type} get_irg_{attribute name} (ir_graph *irg);
+   void set_irg_{attr name} (ir_graph *irg, {attr type} {attr}); */
+
+int (is_ir_graph)(const void *thing)
+{
+	return is_ir_graph_(thing);
 }
 
-void
-(set_irg_current_block)(ir_graph *irg, ir_node *node) {
-  _set_irg_current_block(irg, node);
+#ifdef DEBUG_libfirm
+/* Outputs a unique number for this node */
+long get_irg_graph_nr(const ir_graph *irg)
+{
+	return irg->graph_nr;
+}
+#else
+long get_irg_graph_nr(const ir_graph *irg)
+{
+	return PTR_TO_INT(irg);
 }
+#endif
 
-ir_entity *
-(get_irg_entity)(const ir_graph *irg) {
-  return _get_irg_entity(irg);
+size_t get_irg_idx(const ir_graph *irg)
+{
+	return irg->index;
 }
 
-void
-(set_irg_entity)(ir_graph *irg, ir_entity *ent) {
-  _set_irg_entity(irg, ent);
+ir_node *(get_idx_irn)(const ir_graph *irg, unsigned idx)
+{
+	return get_idx_irn_(irg, idx);
 }
 
-ir_type *
-(get_irg_frame_type)(ir_graph *irg) {
-  return _get_irg_frame_type(irg);
+ir_node *(get_irg_start_block)(const ir_graph *irg)
+{
+	return get_irg_start_block_(irg);
 }
 
-void
-(set_irg_frame_type)(ir_graph *irg, ir_type *ftp) {
-  _set_irg_frame_type(irg, ftp);
+void (set_irg_start_block)(ir_graph *irg, ir_node *node)
+{
+	set_irg_start_block_(irg, node);
 }
 
-int
-get_irg_n_locs (ir_graph *irg)
+ir_node *(get_irg_start)(const ir_graph *irg)
 {
-  if (get_opt_precise_exc_context())
-    return irg->n_loc - 1 - 1;
-  else
-    return irg->n_loc - 1;
+	return get_irg_start_(irg);
 }
 
-void
-set_irg_n_loc (ir_graph *irg, int n_loc)
+void (set_irg_start)(ir_graph *irg, ir_node *node)
 {
-  if (get_opt_precise_exc_context())
-    irg->n_loc = n_loc + 1 + 1;
-  else
-    irg->n_loc = n_loc + 1;
+	set_irg_start_(irg, node);
 }
 
+ir_node *(get_irg_end_block)(const ir_graph *irg)
+{
+	return get_irg_end_block_(irg);
+}
 
+void (set_irg_end_block)(ir_graph *irg, ir_node *node)
+{
+	set_irg_end_block_(irg, node);
+}
 
-/* Returns the obstack associated with the graph. */
-struct obstack *
-(get_irg_obstack)(const ir_graph *irg) {
-  return _get_irg_obstack(irg);
+ir_node *(get_irg_end)(const ir_graph *irg)
+{
+	return get_irg_end_(irg);
 }
 
-/*
- * Returns true if the node n is allocated on the storage of graph irg.
- *
- * Implementation is GLIBC specific as is uses the internal _obstack_chunk implementation.
- */
-int node_is_in_irgs_storage(ir_graph *irg, ir_node *n)
+void (set_irg_end)(ir_graph *irg, ir_node *node)
 {
-  struct _obstack_chunk *p;
+	set_irg_end_(irg, node);
+}
 
-  /*
-   * checks weather the ir_node pointer is on the obstack.
-   * A more sophisticated check would test the "whole" ir_node
-   */
-  for (p = irg->obst->chunk; p; p = p->prev) {
-    if (((char *)p->contents <= (char *)n) && ((char *)n < (char *)p->limit))
-      return 1;
-  }
+ir_node *(get_irg_initial_exec)(const ir_graph *irg)
+{
+	return get_irg_initial_exec_(irg);
+}
 
-  return 0;
+void (set_irg_initial_exec)(ir_graph *irg, ir_node *node)
+{
+	set_irg_initial_exec_(irg, node);
 }
 
-irg_phase_state
-(get_irg_phase_state)(const ir_graph *irg) {
-  return _get_irg_phase_state(irg);
+ir_node *(get_irg_frame)(const ir_graph *irg)
+{
+	return get_irg_frame_(irg);
 }
 
-void
-(set_irg_phase_state)(ir_graph *irg, irg_phase_state state) {
-  _set_irg_phase_state(irg, state);
+void (set_irg_frame)(ir_graph *irg, ir_node *node)
+{
+	set_irg_frame_(irg, node);
 }
 
-op_pin_state
-(get_irg_pinned)(const ir_graph *irg) {
-  return _get_irg_pinned(irg);
+ir_node *(get_irg_initial_mem)(const ir_graph *irg)
+{
+	return get_irg_initial_mem_(irg);
 }
 
-irg_outs_state
-(get_irg_outs_state)(const ir_graph *irg) {
-  return _get_irg_outs_state(irg);
+void (set_irg_initial_mem)(ir_graph *irg, ir_node *node)
+{
+	set_irg_initial_mem_(irg, node);
 }
 
-void
-(set_irg_outs_inconsistent)(ir_graph *irg) {
-  _set_irg_outs_inconsistent(irg);
+ir_node *(get_irg_args)(const ir_graph *irg)
+{
+	return get_irg_args_(irg);
 }
 
-irg_extblk_state
-(get_irg_extblk_state)(const ir_graph *irg) {
-  return _get_irg_extblk_state(irg);
+void (set_irg_args)(ir_graph *irg, ir_node *node)
+{
+	set_irg_args_(irg, node);
 }
 
-void
-(set_irg_extblk_inconsistent)(ir_graph *irg) {
-  _set_irg_extblk_inconsistent(irg);
+ir_node *(get_irg_no_mem)(const ir_graph *irg)
+{
+	return get_irg_no_mem_(irg);
 }
 
-irg_dom_state
-(get_irg_dom_state)(const ir_graph *irg) {
-  return _get_irg_dom_state(irg);
+void (set_irg_no_mem)(ir_graph *irg, ir_node *node)
+{
+	set_irg_no_mem_(irg, node);
 }
 
-irg_dom_state
-(get_irg_postdom_state)(const ir_graph *irg) {
-  return _get_irg_postdom_state(irg);
+ir_entity *(get_irg_entity)(const ir_graph *irg)
+{
+	return get_irg_entity_(irg);
 }
 
-void
-(set_irg_doms_inconsistent)(ir_graph *irg) {
-  _set_irg_doms_inconsistent(irg);
+void (set_irg_entity)(ir_graph *irg, ir_entity *ent)
+{
+	set_irg_entity_(irg, ent);
 }
 
-irg_loopinfo_state
-(get_irg_loopinfo_state)(const ir_graph *irg) {
-  return _get_irg_loopinfo_state(irg);
+ir_type *(get_irg_frame_type)(ir_graph *irg)
+{
+	return get_irg_frame_type_(irg);
 }
 
-void
-(set_irg_loopinfo_state)(ir_graph *irg, irg_loopinfo_state s) {
-  _set_irg_loopinfo_state(irg, s);
+void (set_irg_frame_type)(ir_graph *irg, ir_type *ftp)
+{
+	set_irg_frame_type_(irg, ftp);
 }
 
-void
-(set_irg_loopinfo_inconsistent)(ir_graph *irg) {
-  _set_irg_loopinfo_inconsistent(irg);
+int get_irg_n_locs(ir_graph *irg)
+{
+	return irg->n_loc - 1;
 }
 
-void set_irp_loopinfo_inconsistent(void) {
-  int i, n_irgs = get_irp_n_irgs();
-  for (i = 0; i < n_irgs; ++i) {
-    set_irg_loopinfo_inconsistent(get_irp_irg(i));
-  }
+/* Returns the obstack associated with the graph. */
+struct obstack *(get_irg_obstack)(const ir_graph *irg)
+{
+	return get_irg_obstack_(irg);
 }
 
+/*
+ * Returns true if the node n is allocated on the storage of graph irg.
+ *
+ * Implementation is GLIBC specific as is uses the internal _obstack_chunk implementation.
+ */
+int node_is_in_irgs_storage(const ir_graph *irg, const ir_node *n)
+{
+	struct _obstack_chunk *p;
 
+	/*
+	 * checks weather the ir_node pointer is on the obstack.
+	 * A more sophisticated check would test the "whole" ir_node
+	 */
+	for (p = irg->obst->chunk; p; p = p->prev) {
+		if (((char *)p->contents <= (char *)n) && ((char *)n < (char *)p->limit))
+			return 1;
+	}
 
-void
-(set_irg_pinned)(ir_graph *irg, op_pin_state p) {
-  _set_irg_pinned(irg, p);
+	return 0;
 }
 
-irg_callee_info_state
-(get_irg_callee_info_state)(const ir_graph *irg) {
-  return _get_irg_callee_info_state(irg);
+irg_phase_state (get_irg_phase_state)(const ir_graph *irg)
+{
+	return get_irg_phase_state_(irg);
 }
 
-void
-(set_irg_callee_info_state)(ir_graph *irg, irg_callee_info_state s) {
-  _set_irg_callee_info_state(irg, s);
+void (set_irg_phase_state)(ir_graph *irg, irg_phase_state state)
+{
+	set_irg_phase_state_(irg, state);
 }
 
-irg_inline_property
-(get_irg_inline_property)(const ir_graph *irg) {
-  return _get_irg_inline_property(irg);
+op_pin_state (get_irg_pinned)(const ir_graph *irg)
+{
+	return get_irg_pinned_(irg);
 }
 
-void
-(set_irg_inline_property)(ir_graph *irg, irg_inline_property s) {
-  _set_irg_inline_property(irg, s);
+void (set_irg_pinned)(ir_graph *irg, op_pin_state p)
+{
+	set_irg_pinned_(irg, p);
 }
 
-unsigned
-(get_irg_additional_properties)(const ir_graph *irg) {
-  return _get_irg_additional_properties(irg);
+irg_callee_info_state (get_irg_callee_info_state)(const ir_graph *irg)
+{
+	return get_irg_callee_info_state_(irg);
 }
 
-void
-(set_irg_additional_properties)(ir_graph *irg, unsigned property_mask) {
-  _set_irg_additional_properties(irg, property_mask);
+void (set_irg_callee_info_state)(ir_graph *irg, irg_callee_info_state s)
+{
+	set_irg_callee_info_state_(irg, s);
 }
 
-void
-(set_irg_additional_property)(ir_graph *irg, mtp_additional_property flag) {
-  _set_irg_additional_property(irg, flag);
+irg_inline_property (get_irg_inline_property)(const ir_graph *irg)
+{
+	return get_irg_inline_property_(irg);
 }
 
-void
-(set_irg_link)(ir_graph *irg, void *thing) {
-  _set_irg_link(irg, thing);
+void (set_irg_inline_property)(ir_graph *irg, irg_inline_property s)
+{
+	set_irg_inline_property_(irg, s);
 }
 
-void *
-(get_irg_link)(const ir_graph *irg) {
-  return _get_irg_link(irg);
+mtp_additional_properties (get_irg_additional_properties)(const ir_graph *irg)
+{
+	return get_irg_additional_properties_(irg);
 }
 
-/** maximum visited flag content of all ir_graph visited fields. */
-static unsigned long max_irg_visited = 0;
+void (set_irg_additional_properties)(ir_graph *irg, mtp_additional_properties property_mask)
+{
+	set_irg_additional_properties_(irg, property_mask);
+}
 
-unsigned long
-(get_irg_visited)(const ir_graph *irg) {
-  return _get_irg_visited(irg);
+void (add_irg_additional_properties)(ir_graph *irg, mtp_additional_properties flag)
+{
+	add_irg_additional_properties_(irg, flag);
 }
 
-void
-set_irg_visited (ir_graph *irg, unsigned long visited)
+void (set_irg_link)(ir_graph *irg, void *thing)
 {
-  irg->visited = visited;
-  if (irg->visited > max_irg_visited) {
-    max_irg_visited = irg->visited;
-  }
+	set_irg_link_(irg, thing);
 }
 
-void
-inc_irg_visited (ir_graph *irg)
+void *(get_irg_link)(const ir_graph *irg)
 {
-  if (++irg->visited > max_irg_visited) {
-    max_irg_visited = irg->visited;
-  }
+	return get_irg_link_(irg);
 }
 
-unsigned long
-get_max_irg_visited(void)
+ir_visited_t (get_irg_visited)(const ir_graph *irg)
 {
-  /*
-  int i;
-  for(i = 0; i < get_irp_n_irgs(); i++)
-  assert(max_irg_visited >= get_irg_visited(get_irp_irg(i)));
-   */
-  return max_irg_visited;
+	return get_irg_visited_(irg);
 }
 
-void set_max_irg_visited(int val) {
-  max_irg_visited = val;
+/** maximum visited flag content of all ir_graph visited fields. */
+static ir_visited_t max_irg_visited = 0;
+
+void set_irg_visited(ir_graph *irg, ir_visited_t visited)
+{
+	irg->visited = visited;
+	if (irg->visited > max_irg_visited) {
+		max_irg_visited = irg->visited;
+	}
 }
 
-unsigned long
-inc_max_irg_visited(void)
+void inc_irg_visited(ir_graph *irg)
 {
-  /*
-  int i;
-  for(i = 0; i < get_irp_n_irgs(); i++)
-  assert(max_irg_visited >= get_irg_visited(get_irp_irg(i)));
-  */
-  max_irg_visited++;
-  return max_irg_visited;
+	++irg->visited;
+	if (irg->visited > max_irg_visited) {
+		max_irg_visited = irg->visited;
+	}
 }
 
-unsigned long
-(get_irg_block_visited)(const ir_graph *irg) {
-  return _get_irg_block_visited(irg);
+ir_visited_t get_max_irg_visited(void)
+{
+	return max_irg_visited;
 }
 
-void
-(set_irg_block_visited)(ir_graph *irg, unsigned long visited) {
-  _set_irg_block_visited(irg, visited);
+void set_max_irg_visited(int val)
+{
+	max_irg_visited = val;
 }
 
-void
-(inc_irg_block_visited)(ir_graph *irg) {
-  _inc_irg_block_visited(irg);
+ir_visited_t inc_max_irg_visited(void)
+{
+#ifndef NDEBUG
+	size_t i;
+	for (i = 0; i < get_irp_n_irgs(); i++)
+		assert(max_irg_visited >= get_irg_visited(get_irp_irg(i)));
+#endif
+	return ++max_irg_visited;
 }
 
-/* Return the floating point model of this graph. */
-unsigned (get_irg_fp_model)(const ir_graph *irg) {
-  return _get_irg_fp_model(irg);
+ir_visited_t (get_irg_block_visited)(const ir_graph *irg)
+{
+	return get_irg_block_visited_(irg);
 }
 
-/* Sets the floating point model for this graph. */
-void set_irg_fp_model(ir_graph *irg, unsigned model) {
-  irg->fp_model = model;
+void (set_irg_block_visited)(ir_graph *irg, ir_visited_t visited)
+{
+	set_irg_block_visited_(irg, visited);
 }
 
-/**
- * walker Start->End: places Proj nodes into the same block
- * as it's predecessors
- *
- * @param n    the node
- * @param env  ignored
- */
-static void normalize_proj_walker(ir_node *n, void *env){
-  if (is_Proj(n)) {
-    ir_node *pred  = get_Proj_pred(n);
-    ir_node *block = get_nodes_block(pred);
+void (inc_irg_block_visited)(ir_graph *irg)
+{
+  inc_irg_block_visited_(irg);
+}
 
-    set_nodes_block(n, block);
-  }
+/* Return the floating point model of this graph. */
+unsigned (get_irg_fp_model)(const ir_graph *irg)
+{
+	return get_irg_fp_model_(irg);
 }
 
-/* move Proj nodes into the same block as its predecessors */
-void normalize_proj_nodes(ir_graph *irg) {
-  irg_walk_graph(irg, NULL, normalize_proj_walker, NULL);
-  set_irg_outs_inconsistent(irg);
+/* Sets the floating point model for this graph. */
+void set_irg_fp_model(ir_graph *irg, unsigned model)
+{
+	irg->fp_model = model;
 }
 
 /* set a description for local value n */
-void set_irg_loc_description(ir_graph *irg, int n, void *description) {
-  assert(0 <= n && n < irg->n_loc);
+void set_irg_loc_description(ir_graph *irg, int n, void *description)
+{
+	assert(0 <= n && n < irg->n_loc);
 
-  if (! irg->loc_descriptions)
-    irg->loc_descriptions = xcalloc(sizeof(*irg->loc_descriptions), irg->n_loc);
+	if (! irg->loc_descriptions)
+		irg->loc_descriptions = XMALLOCNZ(void*, irg->n_loc);
 
-  irg->loc_descriptions[n] = description;
+	irg->loc_descriptions[n] = description;
 }
 
 /* get the description for local value n */
-void *get_irg_loc_description(ir_graph *irg, int n) {
-  assert(0 <= n && n < irg->n_loc);
-  return irg->loc_descriptions ? irg->loc_descriptions[n] : NULL;
+void *get_irg_loc_description(ir_graph *irg, int n)
+{
+	assert(0 <= n && n < irg->n_loc);
+	return irg->loc_descriptions ? irg->loc_descriptions[n] : NULL;
 }
 
 #ifndef NDEBUG
-void set_using_block_visited(ir_graph *irg) {
-	assert(irg->using_block_visited == 0);
-	irg->using_block_visited = 1;
-}
-
-void clear_using_block_visited(ir_graph *irg) {
-	assert(irg->using_block_visited == 1);
-	irg->using_block_visited = 0;
+void ir_reserve_resources(ir_graph *irg, ir_resources_t resources)
+{
+	assert((irg->reserved_resources & resources) == 0);
+	irg->reserved_resources |= resources;
 }
 
-int using_block_visited(const ir_graph *irg) {
-  	return irg->using_block_visited;
+void ir_free_resources(ir_graph *irg, ir_resources_t resources)
+{
+	assert((irg->reserved_resources & resources) == resources);
+	irg->reserved_resources &= ~resources;
 }
 
-
-void set_using_visited(ir_graph *irg) {
-	assert(irg->using_visited == 0);
-	irg->using_visited = 1;
+ir_resources_t ir_resources_reserved(const ir_graph *irg)
+{
+	return irg->reserved_resources;
 }
+#endif /* NDEBUG */
 
-void clear_using_visited(ir_graph *irg) {
-	assert(irg->using_visited == 1);
-	irg->using_visited = 0;
+/* Returns a estimated node count of the irg. */
+unsigned (get_irg_estimated_node_cnt)(const ir_graph *irg)
+{
+	return get_irg_estimated_node_cnt_(irg);
 }
 
-int using_visited(const ir_graph *irg) {
-  	return irg->using_visited;
+/* Returns the last irn index for this graph. */
+unsigned get_irg_last_idx(const ir_graph *irg)
+{
+	return irg->last_node_idx;
 }
 
+/* register additional space in an IR graph */
+size_t register_additional_graph_data(size_t size)
+{
+	assert(!forbid_new_data && "Too late to register additional node data");
 
-void set_using_irn_link(ir_graph *irg) {
-	assert(irg->using_irn_link == 0);
-	irg->using_irn_link = 1;
-}
-
-void clear_using_irn_link(ir_graph *irg) {
-	assert(irg->using_irn_link == 1);
-	irg->using_irn_link = 0;
-}
+	if (forbid_new_data)
+		return 0;
 
-int using_irn_link(const ir_graph *irg) {
-  	return irg->using_irn_link;
+	return additional_graph_data_size += size;
 }
-#endif
 
-/* Returns a estimated node count of the irg. */
-unsigned (get_irg_estimated_node_cnt)(const ir_graph *irg) {
-  return _get_irg_estimated_node_cnt(irg);
+void (set_irg_state)(ir_graph *irg, ir_graph_state_t state)
+{
+	set_irg_state_(irg, state);
 }
 
-/* Returns the last irn index for this graph. */
-unsigned get_irg_last_idx(const ir_graph *irg) {
-  return irg->last_node_idx;
+void (clear_irg_state)(ir_graph *irg, ir_graph_state_t state)
+{
+	clear_irg_state_(irg, state);
 }
 
-/* register additional space in an IR graph */
-size_t register_additional_graph_data(size_t size)
+int (is_irg_state)(const ir_graph *irg, ir_graph_state_t state)
 {
-  assert(!forbid_new_data && "Too late to register additional node data");
-
-  if (forbid_new_data)
-    return 0;
-
-  return additional_graph_data_size += size;
+	return is_irg_state_(irg, state);
 }