*/
#ifdef HAVE_CONFIG_H
-# include <config.h>
+# include "config.h"
#endif
+#ifdef HAVE_STRING_H
# include <string.h>
+#endif
+
+#include <stddef.h>
+# include "xmalloc.h"
# include "ircons.h"
# include "irgraph_t.h"
# include "irprog_t.h"
# include "irgmod.h"
# include "mangle.h"
# include "irouts.h"
-# include "firmstat.h"
+# include "irhooks.h"
+# include "irgwalk.h"
+# include "iredges_t.h"
+
+/**
+ * Indicates, whether additional data can be registered to graphs.
+ * If set to 1, this is not possible anymore.
+ */
+static int forbid_new_data = 0;
+
+/**
+ * The amount of additional space for custom data to be allocated upon
+ * creating a new graph.
+ */
+static size_t additional_graph_data_size = 0;
ir_graph *current_ir_graph;
-INLINE ir_graph *get_current_ir_graph(void) {
+ir_graph *get_current_ir_graph(void) {
return current_ir_graph;
}
-INLINE void set_current_ir_graph(ir_graph *graph) {
+void set_current_ir_graph(ir_graph *graph) {
current_ir_graph = graph;
}
int __interprocedural_view = false;
int (get_interprocedural_view)(void) {
- return __get_interprocedural_view();
+ return _get_interprocedural_view();
}
void (set_interprocedural_view)(int state) {
/* set function vectors for faster access */
if (state) {
- __get_irn_arity = __get_irn_inter_arity;
- __get_irn_n = __get_irn_inter_n;
+ _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;
+ _get_irn_arity = _get_irn_intra_arity;
+ _get_irn_n = _get_irn_intra_n;
}
}
-static ident* frame_type_suffix = NULL;
-void init_irgraph(void) {
- frame_type_suffix = new_id_from_chars(FRAME_TP_SUFFIX, strlen(FRAME_TP_SUFFIX));
+/** contains the suffix for frame type names */
+static ident *frame_type_suffix = NULL;
+
+/** The default firm calling convention mask. */
+static unsigned firm_default_cc_mask = 0;
+
+/* initialize the IR graph module */
+void firm_init_irgraph(unsigned default_cc_mask) {
+ frame_type_suffix = new_id_from_str(FRAME_TP_SUFFIX);
+ forbid_new_data = 1;
+ firm_default_cc_mask = default_cc_mask;
+}
+
+/* Gets the default calling convention for new constructed graphs. */
+unsigned get_firm_default_calling_convention(void) {
+ return firm_default_cc_mask;
+}
+
+/* Sets the default calling convention for new constructed graphs. */
+void set_firm_default_calling_convention(unsigned cc_mask) {
+ firm_default_cc_mask = cc_mask;
+}
+
+/**
+ * Allocate a new IR graph.
+ * This function respects the registered graph data. The only reason for
+ * this function is, that there are two locations, where graphs are
+ * 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);
+
+ return (ir_graph *) (ptr + additional_graph_data_size);
+}
+
+/**
+ * Frees an allocated IR graph
+ */
+static void free_graph(ir_graph *irg) {
+ char *ptr = (char *)irg;
+ free(ptr - additional_graph_data_size);
}
#if USE_EXPLICIT_PHI_IN_STACK
and optimization.
*/
ir_graph *
-new_ir_graph (entity *ent, int n_loc)
+new_r_ir_graph (entity *ent, int n_loc)
{
ir_graph *res;
ir_node *first_block;
ir_node *projX;
- res = (ir_graph *) malloc (sizeof (ir_graph));
- memset(res, 0, sizeof (ir_graph));
+ res = alloc_graph();
res->kind = k_ir_graph;
+ edges_init_graph(res);
+
/* inform statistics here, as blocks will be already build on this graph */
- stat_new_graph(res, ent);
+ hook_new_graph(res, ent);
current_ir_graph = res;
- add_irp_irg(res); /* remember this graph global. */
/*-- initialized for each graph. --*/
if (get_opt_precise_exc_context()) {
to the procedure! */
}
- res->visited = 0; /* visited flag, for the ir walker */
+ /* 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
generation */
#endif
res->kind = k_ir_graph;
- res->obst = (struct obstack *) xmalloc (sizeof (struct obstack));
- obstack_init (res->obst);
+ res->obst = xmalloc (sizeof(*res->obst));
+ obstack_init(res->obst);
+ res->extbb_obst = NULL;
+
res->value_table = new_identities (); /* value table for global value
numbering for optimizing use in
iropt.c */
res->outs = NULL;
- res->phase_state = phase_building;
+ res->inline_property = irg_inline_any;
+ res->additional_properties = 0;
+
+ res->phase_state = phase_building;
res->op_pin_state_pinned = op_pin_state_pinned;
- res->outs_state = outs_none;
- res->dom_state = dom_none;
- res->typeinfo_state = irg_typeinfo_none;
- res->loopinfo_state = loopinfo_none;
+ res->outs_state = outs_none;
+ res->dom_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->execfreq_state = exec_freq_none;
+ res->class_cast_state = ir_class_casts_transitive;
+ res->extblk_state = ir_extblk_info_none;
+ res->calling_conv = get_firm_default_calling_convention();
/*-- 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_class(mangle(get_entity_ident(ent), frame_type_suffix));
-
- /* Remove type from type list. Must be treated differently than other types. */
- remove_irp_type_from_list(res->frame_type);
+ res->frame_type = new_type_frame(mangle(get_entity_ident(ent), frame_type_suffix));
/*-- Nodes needed in every graph --*/
res->end_block = new_immBlock();
/* Proj results of start node */
projX = new_Proj (res->start, mode_X, pn_Start_X_initial_exec);
- res->frame = new_Proj (res->start, mode_P_mach, pn_Start_P_frame_base);
- res->globals = new_Proj (res->start, mode_P_mach, pn_Start_P_globals);
+ res->frame = new_Proj (res->start, mode_P_data, pn_Start_P_frame_base);
+ res->globals = new_Proj (res->start, mode_P_data, pn_Start_P_globals);
res->initial_mem = new_Proj (res->start, mode_M, pn_Start_M);
res->args = new_Proj (res->start, mode_T, pn_Start_T_args);
#ifdef DEBUG_libfirm
res->graph_nr = get_irp_new_node_nr();
#endif
+ res->proj_args = NULL;
set_store(res->initial_mem);
first_block = new_immBlock();
add_immBlock_pred (first_block, projX);
+ res->method_execution_frequency = -1;
+
return res;
}
+ir_graph *
+new_ir_graph (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;
+}
+
/* 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 *projX;
- res = (ir_graph *) malloc (sizeof(*res));
- memset(res, 0, sizeof(*res));
+ res = alloc_graph();
/* inform statistics here, as blocks will be already build on this graph */
- stat_new_graph(res, NULL);
+ hook_new_graph(res, NULL);
current_ir_graph = res;
res->n_loc = 1; /* Only the memory. */
res->Phi_in_stack = NULL;
#endif
res->kind = k_ir_graph;
- res->obst = (struct obstack *) xmalloc (sizeof (struct obstack));
+ res->obst = xmalloc (sizeof(*res->obst));
obstack_init (res->obst);
+ res->extbb_obst = NULL;
+
res->phase_state = phase_building;
res->op_pin_state_pinned = op_pin_state_pinned;
+ res->extblk_state = ir_extblk_info_none;
+
res->value_table = new_identities (); /* value table for global value
numbering for optimizing use in
iropt.c */
res->ent = NULL;
res->frame_type = NULL;
- res->start_block = new_immBlock ();
+
+ /* -- 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 ();
- res->initial_mem = new_Proj (res->start, mode_M, pn_Start_M);
-
/* Proj results of start node */
- projX = new_Proj (res->start, mode_X, pn_Start_X_initial_exec);
+ 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 block will never be visited. */
+
+ /* 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->no_mem, -1);
res->phase_state = phase_high;
+
return res;
}
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));
- stat_free_graph(irg);
- if (irg->outs_state != outs_none) free_outs(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) {
#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(irg);
+ free_graph(irg);
}
/* access routines for all ir_graph attributes:
int
(is_ir_graph)(const void *thing) {
- return __is_ir_graph(thing);
+ return _is_ir_graph(thing);
}
/* Outputs a unique number for this node */
-INLINE long
+long
get_irg_graph_nr(ir_graph *irg) {
assert(irg);
#ifdef DEBUG_libfirm
ir_node *
(get_irg_start_block)(const ir_graph *irg) {
- return __get_irg_start_block(irg);
+ return _get_irg_start_block(irg);
}
void
(set_irg_start_block)(ir_graph *irg, ir_node *node) {
- __set_irg_start_block(irg, node);
+ _set_irg_start_block(irg, node);
}
ir_node *
(get_irg_start)(const ir_graph *irg) {
- return __get_irg_start(irg);
+ return _get_irg_start(irg);
}
void
(set_irg_start)(ir_graph *irg, ir_node *node) {
- __set_irg_start(irg, node);
+ _set_irg_start(irg, node);
}
ir_node *
(get_irg_end_block)(const ir_graph *irg) {
- return __get_irg_end_block(irg);
+ return _get_irg_end_block(irg);
}
void
(set_irg_end_block)(ir_graph *irg, ir_node *node) {
- __set_irg_end_block(irg, node);
+ _set_irg_end_block(irg, node);
}
ir_node *
(get_irg_end)(const ir_graph *irg) {
- return __get_irg_end(irg);
+ return _get_irg_end(irg);
}
void
(set_irg_end)(ir_graph *irg, ir_node *node) {
- __set_irg_end(irg, node);
+ _set_irg_end(irg, node);
}
ir_node *
(get_irg_end_reg)(const ir_graph *irg) {
- return __get_irg_end_reg(irg);
+ return _get_irg_end_reg(irg);
}
void set_irg_end_reg (ir_graph *irg, ir_node *node) {
ir_node *
(get_irg_end_except)(const ir_graph *irg) {
- return __get_irg_end_except(irg);
+ return _get_irg_end_except(irg);
}
void set_irg_end_except (ir_graph *irg, ir_node *node) {
ir_node *
(get_irg_cstore)(const ir_graph *irg) {
- return __get_irg_cstore(irg);
+ return _get_irg_cstore(irg);
}
void
(set_irg_cstore)(ir_graph *irg, ir_node *node) {
- __set_irg_cstore(irg, node);
+ _set_irg_cstore(irg, node);
}
ir_node *
(get_irg_frame)(const ir_graph *irg) {
- return __get_irg_frame(irg);
+ return _get_irg_frame(irg);
}
void
(set_irg_frame)(ir_graph *irg, ir_node *node) {
- __set_irg_frame(irg, node);
+ _set_irg_frame(irg, node);
}
ir_node *
(get_irg_globals)(const ir_graph *irg) {
- return __get_irg_globals(irg);
+ return _get_irg_globals(irg);
}
void
(set_irg_globals)(ir_graph *irg, ir_node *node) {
- __set_irg_globals(irg, node);
+ _set_irg_globals(irg, node);
}
ir_node *
(get_irg_initial_mem)(const ir_graph *irg) {
- return __get_irg_initial_mem(irg);
+ return _get_irg_initial_mem(irg);
}
void
(set_irg_initial_mem)(ir_graph *irg, ir_node *node) {
- __set_irg_initial_mem(irg, node);
+ _set_irg_initial_mem(irg, node);
}
ir_node *
(get_irg_args)(const ir_graph *irg) {
- return __get_irg_args(irg);
+ return _get_irg_args(irg);
}
void
(set_irg_args)(ir_graph *irg, ir_node *node) {
- __set_irg_args(irg, node);
+ _set_irg_args(irg, node);
+}
+
+ir_node **
+(get_irg_proj_args) (const ir_graph *irg) {
+ return _get_irg_proj_args (irg);
+}
+
+void
+(set_irg_proj_args) (ir_graph *irg, ir_node **nodes) {
+ _set_irg_proj_args (irg, nodes);
}
ir_node *
(get_irg_bad)(const ir_graph *irg) {
- return __get_irg_bad(irg);
+ return _get_irg_bad(irg);
}
void
(set_irg_bad)(ir_graph *irg, ir_node *node) {
- __set_irg_bad(irg, node);
+ _set_irg_bad(irg, node);
}
ir_node *
(get_irg_no_mem)(const ir_graph *irg) {
- return __get_irg_no_mem(irg);
+ return _get_irg_no_mem(irg);
}
void
(set_irg_no_mem)(ir_graph *irg, ir_node *node) {
- __set_irg_no_mem(irg, node);
+ _set_irg_no_mem(irg, node);
}
ir_node *
(get_irg_current_block)(const ir_graph *irg) {
- return __get_irg_current_block(irg);
+ return _get_irg_current_block(irg);
}
void
(set_irg_current_block)(ir_graph *irg, ir_node *node) {
- __set_irg_current_block(irg, node);
+ _set_irg_current_block(irg, node);
}
entity *
(get_irg_entity)(const ir_graph *irg) {
- return __get_irg_entity(irg);
+ return _get_irg_entity(irg);
}
void
(set_irg_entity)(ir_graph *irg, entity *ent) {
- __set_irg_entity(irg, ent);
+ _set_irg_entity(irg, ent);
}
type *
-(get_irg_frame_type)(const ir_graph *irg) {
- return __get_irg_frame_type(irg);
+(get_irg_frame_type)(ir_graph *irg) {
+ return _get_irg_frame_type(irg);
}
void
(set_irg_frame_type)(ir_graph *irg, type *ftp) {
- __set_irg_frame_type(irg, ftp);
-}
-
-
-/* To test for a frame type */
-int
-is_frame_type(const type *ftp) {
- int i;
- if (is_class_type(ftp)) {
- for (i = 0; i < get_irp_n_irgs(); i++) {
- const type *frame_tp = get_irg_frame_type(get_irp_irg(i));
- if (ftp == frame_tp) return true;
- }
- }
- return false;
+ _set_irg_frame_type(irg, ftp);
}
int
/* Returns the obstack associated with the graph. */
struct obstack *
(get_irg_obstack)(const ir_graph *irg) {
- return __get_irg_obstack(irg);
+ return _get_irg_obstack(irg);
}
/*
struct _obstack_chunk *p;
/*
- * checks wheater the ir_node pointer i on the obstack.
+ * 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) {
irg_phase_state
(get_irg_phase_state)(const ir_graph *irg) {
- return __get_irg_phase_state(irg);
+ return _get_irg_phase_state(irg);
}
void
(set_irg_phase_low)(ir_graph *irg) {
- __set_irg_phase_low(irg);
+ _set_irg_phase_low(irg);
}
op_pin_state
(get_irg_pinned)(const ir_graph *irg) {
- return __get_irg_pinned(irg);
+ return _get_irg_pinned(irg);
}
irg_outs_state
(get_irg_outs_state)(const ir_graph *irg) {
- return __get_irg_outs_state(irg);
+ return _get_irg_outs_state(irg);
}
void
(set_irg_outs_inconsistent)(ir_graph *irg) {
- __set_irg_outs_inconsistent(irg);
+ _set_irg_outs_inconsistent(irg);
}
irg_dom_state
(get_irg_dom_state)(const ir_graph *irg) {
- return __get_irg_dom_state(irg);
+ return _get_irg_dom_state(irg);
}
void
(set_irg_dom_inconsistent)(ir_graph *irg) {
- __set_irg_dom_inconsistent(irg);
+ _set_irg_dom_inconsistent(irg);
}
irg_loopinfo_state
(get_irg_loopinfo_state)(const ir_graph *irg) {
- return __get_irg_loopinfo_state(irg);
+ return _get_irg_loopinfo_state(irg);
}
void
(set_irg_loopinfo_state)(ir_graph *irg, irg_loopinfo_state s) {
- __set_irg_loopinfo_state(irg, s);
+ _set_irg_loopinfo_state(irg, s);
}
void
-set_irg_loopinfo_inconsistent(ir_graph *irg) {
- if (irg->loopinfo_state == loopinfo_ip_consistent)
- irg->loopinfo_state = loopinfo_ip_inconsistent;
+(set_irg_loopinfo_inconsistent)(ir_graph *irg) {
+ _set_irg_loopinfo_inconsistent(irg);
+}
- else if (irg->loopinfo_state == loopinfo_consistent)
- irg->loopinfo_state = loopinfo_inconsistent;
+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));
+ }
+}
- else if (irg->loopinfo_state == loopinfo_cf_ip_consistent)
- irg->loopinfo_state = loopinfo_cf_ip_inconsistent;
- else if (irg->loopinfo_state == loopinfo_cf_consistent)
- irg->loopinfo_state = loopinfo_cf_inconsistent;
-}
void
(set_irg_pinned)(ir_graph *irg, op_pin_state p) {
- __set_irg_pinned(irg, p);
+ _set_irg_pinned(irg, p);
}
irg_callee_info_state
(get_irg_callee_info_state)(const ir_graph *irg) {
- return __get_irg_callee_info_state(irg);
+ return _get_irg_callee_info_state(irg);
}
void
(set_irg_callee_info_state)(ir_graph *irg, irg_callee_info_state s) {
- __set_irg_callee_info_state(irg, s);
+ _set_irg_callee_info_state(irg, s);
}
irg_inline_property
(get_irg_inline_property)(const ir_graph *irg) {
- return __get_irg_inline_property(irg);
+ return _get_irg_inline_property(irg);
}
void
(set_irg_inline_property)(ir_graph *irg, irg_inline_property s) {
- __set_irg_inline_property(irg, s);
+ _set_irg_inline_property(irg, s);
+}
+
+unsigned
+(get_irg_additional_properties)(const ir_graph *irg) {
+ return _get_irg_additional_properties(irg);
+}
+
+void
+(set_irg_additional_properties)(ir_graph *irg, unsigned property_mask) {
+ _set_irg_additional_properties(irg, property_mask);
+}
+
+void
+(set_irg_additional_property)(ir_graph *irg, irg_additional_property flag) {
+ _set_irg_additional_property(irg, flag);
+}
+
+/* Returns the calling convention of a graph. */
+unsigned
+(get_irg_calling_convention)(const ir_graph *irg) {
+ return _get_irg_calling_convention(irg);
+}
+
+/* Sets the calling convention of a graph. */
+void
+(set_irg_calling_convention)(ir_graph *irg, unsigned cc_mask) {
+ _set_irg_calling_convention(irg, cc_mask);
}
void
(set_irg_link)(ir_graph *irg, void *thing) {
- __set_irg_link(irg, thing);
+ _set_irg_link(irg, thing);
}
void *
(get_irg_link)(const ir_graph *irg) {
- return __get_irg_link(irg);
+ return _get_irg_link(irg);
}
-/* maximum visited flag content of all ir_graph visited fields. */
-static int max_irg_visited = 0;
+/** maximum visited flag content of all ir_graph visited fields. */
+static unsigned long max_irg_visited = 0;
unsigned long
(get_irg_visited)(const ir_graph *irg) {
- return __get_irg_visited(irg);
+ return _get_irg_visited(irg);
}
void
unsigned long
(get_irg_block_visited)(const ir_graph *irg) {
- return __get_irg_block_visited(irg);
+ return _get_irg_block_visited(irg);
}
void
(set_irg_block_visited)(ir_graph *irg, unsigned long visited) {
- __set_irg_block_visited(irg, visited);
+ _set_irg_block_visited(irg, visited);
}
void
(inc_irg_block_visited)(ir_graph *irg) {
- __inc_irg_block_visited(irg);
+ _inc_irg_block_visited(irg);
}
-/* is irg a pseudo graph for analysis? */
-int is_pseudo_ir_graph(ir_graph *irg)
-{
- int res = false;
- entity *ent;
- assert(irg && "nothing here");
- assert(is_ir_graph(irg) && "no ir_graph given");
+/**
+ * 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);
- ent = get_irg_entity(irg);
- if(visibility_external_allocated == get_entity_visibility(ent)
- && peculiarity_existent == get_entity_peculiarity(ent)) {
- res = true;
+ set_nodes_block(n, block);
}
- return(res);
+}
+
+/* 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);
+}
+
+/* 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);
+
+ if (! irg->loc_descriptions)
+ irg->loc_descriptions = xcalloc(sizeof(*irg->loc_descriptions), irg->n_loc);
+
+ 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;
+}
+
+/* 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");
+
+ if (forbid_new_data)
+ return 0;
+
+ return additional_graph_data_size += size;
}