* @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"
#include "dbginfo_t.h"
#include "iropt_dbg.h"
-#include "eset.h"
#include "pmap.h"
#include "array.h"
#include "error.h"
/* unambiguous address used as a mark. */
static void *MARK = &MARK;
-static eset *entities = NULL;
+static pset *entities = NULL;
/*--------------------------------------------------------------------------*/
/* The analysis */
/** 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, pset *set)
{
- int i;
+ size_t i;
+ size_t size = 0;
if (get_entity_irg(method) != NULL) {
- eset_insert(set, method);
- ++(*size);
+ /* has an implementation */
+ pset_insert_ptr(set, method);
+ ++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;
+ pset *set = pset_new_ptr_default();
+ 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;
+ foreach_pset(set, ir_entity, ent) {
+ arr[--size] = ent;
+ }
}
- eset_destroy(set);
+ del_pset(set);
return arr;
}
if (is_Sel(node) && is_Method_type(get_entity_type(get_Sel_entity(node)))) {
ir_entity *ent = get_SymConst_entity(get_atomic_ent_value(get_Sel_entity(node)));
- if (!eset_contains(entities, ent)) {
+ if (!pset_find_ptr(entities, ent)) {
/* Entity not yet handled. Find all (internal or external)
* implemented methods that overwrites this entity.
* This set is stored in the entity link. */
set_entity_link(ent, get_impl_methods(ent));
- eset_insert(entities, ent);
+ pset_insert_ptr(entities, ent);
}
/* -- As an add on we get an optimization that removes polymorphic calls.
*/
assert(get_entity_irg(ent) == NULL);
}
+#if 0
else if (get_opt_closed_world() && get_opt_dyn_meth_dispatch() &&
(ARR_LEN(arr) == 1 && arr[0] != NULL)) {
ir_node *new_node;
DBG_OPT_POLY(node, new_node);
exchange(node, new_node);
}
+#endif
}
}
*/
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) {
+ entities = pset_new_ptr_default();
+ 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 ir_entity ** get_Sel_arr(ir_node * sel)
{
static ir_entity ** NULL_ARRAY = NULL;
- ir_entity * ent;
- ir_entity ** arr;
-
- assert(is_Sel(sel));
- ent = get_Sel_entity(sel);
+ ir_entity *const ent = get_Sel_entity(sel);
assert(is_Method_type(get_entity_type(ent))); /* what else? */
- arr = (ir_entity**) get_entity_link(ent);
+
+ ir_entity **const arr = (ir_entity**)get_entity_link(ent);
if (arr) {
return arr;
} else {
*
* @param sel the Sel node
*/
-static int get_Sel_n_methods(ir_node * sel)
+static size_t get_Sel_n_methods(ir_node * sel)
{
return ARR_LEN(get_Sel_arr(sel));
}
/**
* Returns the ith possible called method entity at a Sel node.
*/
-static ir_entity * get_Sel_method(ir_node * sel, int pos)
+static ir_entity * get_Sel_method(ir_node * sel, size_t pos)
{
ir_entity ** arr = get_Sel_arr(sel);
- assert(pos >= 0 && pos < ARR_LEN(arr));
+ assert(pos < ARR_LEN(arr));
return arr[pos];
}
/* forward */
-static void free_mark(ir_node * node, eset * set);
+static void free_mark(ir_node *node, pset *set);
-static void free_mark_proj(ir_node * node, long n, eset * set)
+static void free_mark_proj(ir_node *node, long n, pset *set)
{
assert(get_irn_mode(node) == mode_T);
if (get_irn_link(node) == MARK) {
* @param node the current visited node
* @param set the set of all free methods
*/
-static void free_mark(ir_node *node, eset * set)
+static void free_mark(ir_node *node, pset *set)
{
- int i;
-
if (get_irn_link(node) == MARK)
return; /* already visited */
case iro_Sel: {
ir_entity *ent = get_Sel_entity(node);
if (is_method_entity(ent)) {
- for (i = get_Sel_n_methods(node) - 1; i >= 0; --i) {
- eset_insert(set, get_Sel_method(node, i));
+ size_t i, n;
+ for (i = 0, n = get_Sel_n_methods(node); i < n; ++i) {
+ pset_insert_ptr(set, get_Sel_method(node, i));
}
}
break;
if (get_SymConst_kind(node) == symconst_addr_ent) {
ir_entity *ent = get_SymConst_entity(node);
if (is_method_entity(ent)) {
- eset_insert(set, ent);
+ pset_insert_ptr(set, ent);
}
}
break;
case iro_Phi:
- for (i = get_Phi_n_preds(node) - 1; i >= 0; --i) {
+ {
+ int i, n;
+ for (i = 0, n = get_Phi_n_preds(node); i < n; ++i) {
free_mark(get_Phi_pred(node, i), set);
}
break;
+ }
case iro_Proj:
free_mark_proj(get_Proj_pred(node), get_Proj_proj(node), set);
break;
*/
static void free_ana_walker(ir_node *node, void *env)
{
- eset *set = (eset*) env;
- int i;
+ pset *set = (pset*) env;
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;
* which is sometimes used to anchor functions.
*/
static void add_method_address_inititializer(ir_initializer_t *initializer,
- eset *set)
+ pset *set)
{
ir_node *n;
size_t i;
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);
+ pset_insert_ptr(set, ent);
}
return;
case IR_INITIALIZER_TARVAL:
* 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;
*
* which is sometimes used to anchor functions.
*/
-static void add_method_address(ir_entity *ent, eset *set)
+static void add_method_address(ir_entity *ent, pset *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);
-
- /* let's check if it's the address of a function */
- if (is_Global(n)) {
- ir_entity *ent = get_Global_entity(n);
-
- if (is_Method_type(get_entity_type(ent)))
- eset_insert(set, ent);
- }
- }
}
}
*/
static size_t get_free_methods(ir_entity ***free_methods)
{
- eset *free_set = eset_create();
- int i;
+ pset *free_set = pset_new_ptr_default();
+ 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);
+ ir_entity *const ent = get_irg_entity(irg);
linkage = get_entity_linkage(ent);
- if (entity_is_externally_visible(ent)
- || (linkage & IR_LINKAGE_HIDDEN_USER)) {
- eset_insert(free_set, ent);
+ if ((linkage & IR_LINKAGE_HIDDEN_USER) || entity_is_externally_visible(ent)) {
+ pset_insert_ptr(free_set, ent);
}
ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK);
/* 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) {
+ ir_entity *const 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) {
+ ir_entity *const ent = get_compound_member(tp, j);
add_method_address(ent, free_set);
}
/* the main program is even then "free", if it's not external visible. */
irg = get_irp_main_irg();
if (irg != NULL)
- eset_insert(free_set, get_irg_entity(irg));
+ pset_insert_ptr(free_set, get_irg_entity(irg));
/* Finally, transform the set into an array. */
- length = eset_count(free_set);
+ length = pset_count(free_set);
arr = XMALLOCN(ir_entity*, length);
- for (i = 0, ent = (ir_entity*) eset_first(free_set); ent; ent = (ir_entity*) eset_next(free_set)) {
+ i = 0;
+ foreach_pset(free_set, ir_entity, ent) {
arr[i++] = ent;
}
- eset_destroy(free_set);
+ del_pset(free_set);
*free_methods = arr;
return length;
/* Callee analysis. */
/*--------------------------------------------------------------------------*/
-static void callee_ana_node(ir_node * node, eset * methods);
+static void callee_ana_node(ir_node *node, pset *methods);
-static void callee_ana_proj(ir_node *node, long n, eset *methods)
+static void callee_ana_proj(ir_node *node, long n, pset *methods)
{
assert(get_irn_mode(node) == mode_T);
if (get_irn_link(node) == MARK) {
if (is_Tuple(pred)) {
callee_ana_proj(get_Tuple_pred(pred, get_Proj_proj(node)), n, methods);
} else {
- eset_insert(methods, unknown_entity); /* free method -> unknown */
+ pset_insert_ptr(methods, get_unknown_entity()); /* free method -> unknown */
}
}
break;
break;
default:
- eset_insert(methods, unknown_entity); /* free method -> unknown */
+ pset_insert_ptr(methods, get_unknown_entity()); /* free method -> unknown */
break;
}
}
* @param node the node representing the call address
* @param methods after call contains the set of all possibly called entities
*/
-static void callee_ana_node(ir_node *node, eset *methods)
+static void callee_ana_node(ir_node *node, pset *methods)
{
- int i;
-
assert(mode_is_reference(get_irn_mode(node)) || is_Bad(node));
/* Beware of recursion */
if (get_irn_link(node) == MARK) {
case iro_Const:
/* A direct address call. We tread this as an external
call and ignore it completely. */
- eset_insert(methods, unknown_entity); /* free method -> unknown */
+ pset_insert_ptr(methods, get_unknown_entity()); /* free method -> unknown */
break;
case iro_SymConst: {
ir_entity *ent = get_SymConst_entity(node);
assert(ent && is_method_entity(ent));
- eset_insert(methods, ent);
+ pset_insert_ptr(methods, ent);
break;
}
- case iro_Sel:
+ case iro_Sel: {
/* polymorphic method */
- for (i = get_Sel_n_methods(node) - 1; i >= 0; --i) {
+ size_t i, n;
+ for (i = 0, n = get_Sel_n_methods(node); i < n; ++i) {
ir_entity *ent = get_Sel_method(node, i);
if (ent != NULL) {
- eset_insert(methods, ent);
+ pset_insert_ptr(methods, ent);
} else {
- eset_insert(methods, unknown_entity);
+ pset_insert_ptr(methods, get_unknown_entity());
}
}
break;
+ }
case iro_Bad:
/* nothing */
break;
- case iro_Phi:
+ case iro_Phi: {
+ int i;
for (i = get_Phi_n_preds(node) - 1; i >= 0; --i) {
callee_ana_node(get_Phi_pred(node, i), methods);
}
break;
+ }
case iro_Mux:
callee_ana_node(get_Mux_false(node), methods);
case iro_Sub:
case iro_Conv:
/* extern */
- eset_insert(methods, unknown_entity); /* free method -> unknown */
+ pset_insert_ptr(methods, get_unknown_entity()); /* free method -> unknown */
break;
default:
{
(void) env;
if (is_Call(call)) {
- eset *methods = eset_create();
- ir_entity *ent;
+ pset *methods = pset_new_ptr_default();
ir_entity **arr;
- int i;
+ size_t i;
callee_ana_node(get_Call_ptr(call), methods);
- arr = NEW_ARR_F(ir_entity *, eset_count(methods));
- for (i = 0, ent = (ir_entity*) eset_first(methods); ent; ent = (ir_entity*) eset_next(methods)) {
+ arr = NEW_ARR_F(ir_entity*, pset_count(methods));
+ i = 0;
+ foreach_pset(methods, ir_entity, ent) {
arr[i] = ent;
/* we want the unknown_entity on the zero position for easy tests later */
- if (ent == unknown_entity) {
+ if (is_unknown_entity(ent)) {
arr[i] = arr[0];
- arr[0] = unknown_entity;
+ arr[0] = get_unknown_entity();
}
++i;
}
set_Call_callee_arr(call, ARR_LEN(arr), arr);
DEL_ARR_F(arr);
- eset_destroy(methods);
+ del_pset(methods);
}
}
*/
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);
/** Frees intermediate data structures. */
static void sel_methods_dispose(void)
{
- ir_entity * ent;
assert(entities);
- for (ent = (ir_entity*) eset_first(entities); ent; ent = (ir_entity*) eset_next(entities)) {
- ir_entity ** arr = (ir_entity**) get_entity_link(ent);
- if (arr) {
+ foreach_pset(entities, ir_entity, ent) {
+ ir_entity **arr = (ir_entity**) get_entity_link(ent);
+ if (arr != NULL) {
DEL_ARR_F(arr);
}
set_entity_link(ent, NULL);
}
- eset_destroy(entities);
+ del_pset(entities);
entities = NULL;
}
-/*--------------------------------------------------------------------------*/
-/* Freeing the callee arrays. */
-/*--------------------------------------------------------------------------*/
-
static void destruct_walker(ir_node * node, void * env)
{
(void) env;
}
}
-/*--------------------------------------------------------------------------*/
-/* Main drivers. */
-/*--------------------------------------------------------------------------*/
-
size_t cgana(ir_entity ***free_methods)
{
size_t length;
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));
}
}
-/* Optimize the address expressions passed to call nodes.
- *
- * This optimization performs the following transformations for
- * all ir graphs:
- * - All SymConst operations that refer to intern methods are replaced
- * by Const operations referring to the corresponding entity.
- * - Sel nodes, that select entities that are not overwritten are
- * replaced by Const nodes referring to the selected entity.
- * - Sel nodes, for which no method exists at all are replaced by Bad
- * nodes.
- * - Sel nodes with a pointer input that is an Alloc node are replaced
- * by Const nodes referring to the entity that implements the method in
- * the type given by the Alloc node.
- */
void opt_call_addrs(void)
{
+ /* Optimize the address expressions passed to call nodes.
+ *
+ * This optimization performs the following transformations for
+ * all ir graphs:
+ * - All SymConst operations that refer to intern methods are replaced
+ * by Const operations referring to the corresponding entity.
+ * - Sel nodes, that select entities that are not overwritten are
+ * replaced by Const nodes referring to the selected entity.
+ * - Sel nodes, for which no method exists at all are replaced by Bad
+ * nodes.
+ * - Sel nodes with a pointer input that is an Alloc node are replaced
+ * by Const nodes referring to the entity that implements the method in
+ * the type given by the Alloc node.
+ */
sel_methods_init();
sel_methods_dispose();
}
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