* @brief Intraprozedural analyses to estimate the call graph.
* @author Hubert Schmid
* @date 09.06.2002
- * @version $Id$
* @brief
* Interprocedural analysis to estimate the calling relation.
*
#include <string.h>
#include "cgana.h"
-#include "rta.h"
#include "xmalloc.h"
#include "irnode_t.h"
/** Collect the entity representing the implementation of this
* method (not the same if inherited) and all entities for overwriting
- * implementations in "set".
- * If the implementation of the method is not included in the
- * compilation unit "open" is set to true.
+ * implementations in parameter set.
* A recursive descend in the overwritten relation.
* Cycle-free, therefore must terminate.
*
- * @param method
+ * @param method the overwritten method
* @param set A set of entities.
- * @param size Number of entities in set.
- * @param open
+ *
+ * @return Number of entities in set.
*/
-static void collect_impls(ir_entity *method, eset *set, int *size, int *open)
+static size_t collect_impls(ir_entity *method, eset *set)
{
- int i;
+ size_t i;
+ size_t size = 0;
if (get_entity_irg(method) != NULL) {
+ /* has an implementation */
eset_insert(set, method);
- ++(*size);
+ ++size;
}
/*- recursive descent -*/
- for (i = get_entity_n_overwrittenby(method) - 1; i >= 0; --i)
- collect_impls(get_entity_overwrittenby(method, i), set, size, open);
+ for (i = get_entity_n_overwrittenby(method); i > 0;)
+ size += collect_impls(get_entity_overwrittenby(method, --i), set);
+ return size;
}
-/** Alle Methoden bestimmen, die die �bergebene Methode �berschreiben
- * (und implementieren). In der zur�ckgegebenen Reihung kommt jede
- * Methode nur einmal vor. Der Wert 'NULL' steht f�r unbekannte
- * (externe) Methoden. Die zur�ckgegebene Reihung mu� vom Aufrufer
- * wieder freigegeben werden (siehe "DEL_ARR_F"). Gibt es �berhaupt
- * keine Methoden, die "method" �berschreiben, so gibt die Methode
- * "NULL" zur�ck.
+/**
+ * Determine all methods that overwrite the given method (and implement it).
+ * The returned array must be freed by the caller (see DEL_ARR_F).
+ * If the set of overwriting methods is empty, returns NULL.
*
- * @param method
+ * @param method the method
*/
-static ir_entity ** get_impl_methods(ir_entity * method)
+static ir_entity **get_impl_methods(ir_entity *method)
{
- eset * set = eset_create();
- int size = 0;
- ir_entity ** arr;
- int open = 0;
+ ir_entity **arr;
+ eset *set = eset_create();
+ size_t size;
/* Collect all method entities that can be called here */
- collect_impls(method, set, &size, &open);
+ size = collect_impls(method, set);
- /* Vorgaenger einfuegen. */
- if (size == 0 && !open) {
- /* keine implementierte �berschriebene Methode */
+ if (size == 0) {
+ /* no overwriting methods found */
arr = NULL;
- } else if (open) {
- ir_entity * ent;
- arr = NEW_ARR_F(ir_entity *, size + 1);
- arr[0] = NULL; /* Represents open method */
- for (ent = (ir_entity*) eset_first(set); size > 0; ent = (ir_entity*) eset_next(set), --size)
- arr[size] = ent;
} else {
ir_entity * ent;
arr = NEW_ARR_F(ir_entity *, size);
- for (size -= 1, ent = (ir_entity*) eset_first(set); size >= 0; ent = (ir_entity*) eset_next(set), --size)
- arr[size] = ent;
+ for (ent = (ir_entity*) eset_first(set); size > 0; ent = (ir_entity*) eset_next(set))
+ arr[--size] = ent;
}
eset_destroy(set);
return arr;
*/
static void sel_methods_init(void)
{
- int i;
+ size_t i, n;
pmap *ldname_map = pmap_create(); /* Map entity names to entities: to replace
SymConst(name) by SymConst(ent). */
assert(entities == NULL);
entities = eset_create();
- for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
ir_entity * ent = get_irg_entity(get_irp_irg(i));
/* only external visible methods are allowed to call by a SymConst_ptr_name */
if (entity_is_externally_visible(ent)) {
*/
static void free_mark(ir_node *node, eset * set)
{
- size_t i, n;
-
if (get_irn_link(node) == MARK)
return; /* already visited */
case iro_Sel: {
ir_entity *ent = get_Sel_entity(node);
if (is_method_entity(ent)) {
+ size_t i, n;
for (i = 0, n = get_Sel_n_methods(node); i < n; ++i) {
eset_insert(set, get_Sel_method(node, i));
}
static void free_ana_walker(ir_node *node, void *env)
{
eset *set = (eset*) env;
- int i;
if (get_irn_link(node) == MARK) {
/* already visited */
/* nothing */
break;
case iro_Call:
+ {
+ size_t i, n;
/* we must handle Call nodes specially, because their call address input
do not expose a method address. */
set_irn_link(node, MARK);
- for (i = get_Call_n_params(node) - 1; i >= 0; --i) {
+ for (i = 0, n = get_Call_n_params(node); i < n; ++i) {
ir_node *pred = get_Call_param(node, i);
if (mode_is_reference(get_irn_mode(pred))) {
free_mark(pred, set);
}
}
break;
- default:
+ }
+ default: {
+ int i;
/* other nodes: Alle anderen Knoten nehmen wir als Verr�ter an, bis
* jemand das Gegenteil implementiert. */
set_irn_link(node, MARK);
}
break;
}
+ }
}
/**
* Add all method addresses in global new style initializers to the set.
*
* @note
- * We do NOT check the type here, just it it's an entity address.
+ * We do NOT check the type here, just if it's an entity address.
* The reason for this is code like:
*
* void *p = function;
n = initializer->consti.value;
/* let's check if it's the address of a function */
- if (is_Global(n)) {
- ir_entity *ent = get_Global_entity(n);
+ if (is_SymConst_addr_ent(n)) {
+ ir_entity *ent = get_SymConst_entity(n);
if (is_Method_type(get_entity_type(ent)))
eset_insert(set, ent);
* Add all method addresses in global initializers to the set.
*
* @note
- * We do NOT check the type here, just it it's an entity address.
+ * We do NOT check the type here, just if it's an entity address.
* The reason for this is code like:
*
* void *p = function;
*/
static void add_method_address(ir_entity *ent, eset *set)
{
- ir_node *n;
ir_type *tp;
- int i;
- /* ignore methods: these of course reference it's address
- * TODO: remove this later once this incorrect self-intialisation is gone
+ /* ignore methods: these of course reference their addresses
+ * TODO: remove this later once this incorrect self-initialisation is gone
*/
tp = get_entity_type(ent);
if (is_Method_type(tp))
if (ent->initializer != NULL) {
add_method_address_inititializer(get_entity_initializer(ent), set);
} else if (entity_has_compound_ent_values(ent)) {
- for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i) {
- n = get_compound_ent_value(ent, i);
+ size_t i, n;
+ for (i = 0, n = get_compound_ent_n_values(ent); i < n; ++i) {
+ ir_node *irn = get_compound_ent_value(ent, i);
/* let's check if it's the address of a function */
- if (is_Global(n)) {
- ir_entity *ent = get_Global_entity(n);
+ if (is_SymConst_addr_ent(irn)) {
+ ir_entity *ent2 = get_SymConst_entity(irn);
- if (is_Method_type(get_entity_type(ent)))
- eset_insert(set, ent);
+ if (is_Method_type(get_entity_type(ent2)))
+ eset_insert(set, ent2);
}
}
}
static size_t get_free_methods(ir_entity ***free_methods)
{
eset *free_set = eset_create();
- int i;
+ size_t i, n, j, m;
ir_entity **arr;
ir_entity *ent;
ir_graph *irg;
ir_type *tp;
size_t length;
- for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
ir_linkage linkage;
irg = get_irp_irg(i);
ent = get_irg_entity(irg);
linkage = get_entity_linkage(ent);
- if (entity_is_externally_visible(ent)
- || (linkage & IR_LINKAGE_HIDDEN_USER)) {
+ if ((linkage & IR_LINKAGE_HIDDEN_USER) || entity_is_externally_visible(ent)) {
eset_insert(free_set, ent);
}
/* insert all methods that are used in global variables initializers */
tp = get_glob_type();
- for (i = get_class_n_members(tp) - 1; i >= 0; --i) {
- ent = get_class_member(tp, i);
+ for (j = 0, m = get_class_n_members(tp); j < m; ++j) {
+ ent = get_class_member(tp, j);
add_method_address(ent, free_set);
}
tp = get_tls_type();
- for (i = get_class_n_members(tp) - 1; i >= 0; --i) {
- ent = get_class_member(tp, i);
+ for (j = 0, m = get_compound_n_members(tp); j < m; ++j) {
+ ent = get_compound_member(tp, j);
add_method_address(ent, free_set);
}
*/
static void callee_ana(void)
{
- int i;
+ size_t i, n;
/* analyse all graphs */
- for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
ir_graph *irg = get_irp_irg(i);
irg_walk_graph(irg, callee_walker, remove_Tuples, NULL);
set_irg_callee_info_state(irg, irg_callee_info_consistent);
void free_irp_callee_info(void)
{
- int i;
- for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ size_t i, n;
+ for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
free_callee_info(get_irp_irg(i));
}
}
projects / libfirm / blobdiff