*/
/**
- * Intraprozedurale Analyse zur Abschätzung der Aufrufrelation. Es
+ * Intraprozedurale Analyse zur Abschätzung der Aufrufrelation. Es wird
* die Menge der instantiierten Klassen bestimmt, und daraus eine Abschätzung
- * der aufgerufenen Methoden bestimmt.
+ * der aufgerufenen Methoden.
+ *
+ * Voraussetzung ist, dass das Programm keine Methodenzeiger handhaben kann.
+ * In diesem Fall koennten Methoden verloren gehen. Oder wir muessen nach
+ * allen "freien" Methoden suchen (siehe cgana).
+ *
+ * @@@ Die Analyse sollte wissen, von welchen Klassen Instanzen ausserhalb
+ * der Uebersetzungseinheit alloziert werden koennen. Diese muessen in
+ * die initiale Menge allozierter Klassen aufgenommern werden.
*/
#ifdef HAVE_CONFIG_H
#include <stdlib.h>
#include "irnode_t.h"
-#include "irprog.h"
+#include "irprog_t.h"
#include "eset.h"
#include "irgwalk.h"
# define TRUE 1
# define FALSE 0
+/* flags */
+static int verbose = 0;
+
+
/* base data */
static eset *_live_classes = NULL;
/* cache computed results */
static eset *_live_graphs = NULL;
-static int whole_world = 0;
-static int verbose = 0;
-
/**
Given a method, find the firm graph that implements that method.
*/
static ir_graph *get_implementing_graph (entity *method)
{
+#if 0
ir_graph *graph = get_entity_irg ((entity*) method);
+ /* Search upwards in the overwrites graph. */
+ /* GL: this will not work for multiple inheritance */
if (NULL == graph) {
int i;
int n_over = get_entity_n_overwrites ((entity*) method);
}
}
+ /* GL this is not valid in our remove irg algorithm ... which we removed by now ... */
+ assert(get_entity_peculiarity(method) == peculiarity_description
+ || graph == get_entity_irg(get_SymConst_entity(get_atomic_ent_value(method))));
+
/* we *must* always return a graph != NULL, *except* when we're used
inside remove_irg or force_description */
/* assert (graph && "no graph"); */
return (graph);
+#else
+ ir_graph *graph = NULL;
+
+ if (get_entity_peculiarity(method) != peculiarity_description)
+ graph = get_entity_irg(get_SymConst_entity(get_atomic_ent_value(method)));
+
+ return graph;
+#endif
}
static int add_graph (ir_graph *graph)
if (!eset_contains (_live_graphs, graph)) {
if (verbose > 1) {
fprintf(stdout, "RTA: new graph of ");
- DDMEO(get_irg_ent (graph));
+ DDMEO(get_irg_entity (graph));
}
eset_insert (_live_graphs, graph);
static int add_class (type *clazz)
{
if (!eset_contains (_live_classes, clazz)) {
- if (verbose > 1) {
- fprintf(stdout, "RTA: new class: ");
- DDMT(clazz);
- }
+ if (verbose > 1) {
+ fprintf(stdout, "RTA: new class: ");
+ DDMT(clazz);
+ }
eset_insert (_live_classes, clazz);
return (TRUE);
return (FALSE);
}
-/**
- Given an entity, add all implementing graphs that belong to live classes to _live_graphs.
-
- Iff additions occurred, return TRUE, else FALSE.
+/** Given an entity, add all implementing graphs that belong to live classes
+ * to _live_graphs.
+ *
+ * Iff additions occurred, return TRUE, else FALSE.
*/
static int add_implementing_graphs (entity *method)
{
return (change);
}
-/**
- Enter all method accesses and all class allocations into
- our tables.
-
- Set *(int*)env to true iff (possibly) new graphs have been found.
-*/
+/** Enter all method accesses and all class allocations into
+ * our tables.
+ *
+ * Set *(int*)env to true iff (possibly) new graphs have been found.
+ */
static void rta_act (ir_node *node, void *env)
{
int *change = (int*) env;
ir_node *ptr = get_Call_ptr (node);
- if (iro_Sel == get_irn_opcode (ptr)) { /* CALL SEL */
+ /* CALL SEL */
+ if (iro_Sel == get_irn_opcode (ptr)) {
ent = get_Sel_entity (ptr);
- *change = add_implementing_graphs (ent);
- } else if (iro_Const == get_irn_opcode (ptr)) { /* CALL CONST */
- ent = get_tarval_entity (get_Const_tarval (ptr));
- ir_graph *graph = get_entity_irg (ent);
- /* don't use get_implementing_graph on a Const! */
- if (graph) {
- *change = add_graph (graph);
- } else {
- /* it's an externally allocated thing. */
- }
- } else if (iro_SymConst == get_irn_opcode (ptr)) { /* CALL SYMCONST */
+ *change |= add_implementing_graphs (ent);
+
+ /* CALL SYMCONST */
+ } else if (iro_SymConst == get_irn_opcode (ptr)) {
if (get_SymConst_kind(ptr) == symconst_addr_ent) {
ent = get_SymConst_entity (ptr);
ir_graph *graph = get_entity_irg (ent);
- /* don't use get_implementing_graph on a Const! */
if (graph) {
- *change = add_graph (graph);
+ *change |= add_graph (graph);
} else {
- /* it's an externally allocated thing. */
+ /* it's an external allocated thing. */
}
} else if (get_SymConst_kind(ptr) == symconst_addr_name) {
- /* If this SymConst refers to a method the method is external_visible
- and therefore must be considered live anyways. */
- /* assert (ent && "couldn't determine entity of call to symConst"); */
+ /* If this SymConst refers to a method the method is external_visible
+ and therefore must be considered live anyways. */
+ if (get_SymConst_name(ptr) != new_id_from_str("iro_Catch"))
+ assert (ent && "couldn't determine entity of call to symConst");
} else {
/* other symconst. */
+ assert(0 && "This SymConst can not be an address for a method call.");
}
+ /* STRANGE */
+ } else {
+ DDMN(ptr);
+ assert(0 && "Unexpected address expression: can not analyse, therefore can not do correct rta!");
}
+
} else if (iro_Alloc == op) { /* ALLOC */
type *type = get_Alloc_type (node);
- *change = add_class (type);
+ *change |= add_class (type);
}
}
current_ir_graph = graph;
- irg_walk (get_irg_end (graph), rta_act, NULL, &change);
+ irg_walk_graph (graph, rta_act, NULL, &change);
return (change);
}
-/**
- Traverse all graphs to collect method accesses and object allocations.
-
- @param rerun Whether to rely on is_alive in a second run
-*/
+/** Traverse all graphs to collect method accesses and object allocations.
+ *
+ * @param rerun Whether to rely on is_alive in a second run
+ */
static int rta_fill_incremental (void)
{
int i;
ir_graph *graph = get_irp_irg (i);
entity *ent = get_irg_entity (graph);
- if (((!whole_world) &&
- (visibility_external_visible == get_entity_visibility (ent))) ||
+ if ((visibility_external_visible == get_entity_visibility (ent)) ||
(stickyness_sticky == get_entity_stickyness (ent))) {
eset_insert (_live_graphs, graph);
+ // printf("external visible: "); DDMG(graph);
}
}
eset_insert_all (_live_graphs, live_graphs);
rerun = FALSE;
-
for (graph = eset_first (live_graphs);
graph;
graph = eset_next (live_graphs)) {
if (verbose > 1) {
fprintf(stdout, "RTA: RUN %i: considering graph of ", n_runs);
- DDMEO(get_irg_ent (graph));
+ DDMEO(get_irg_entity (graph));
}
rerun |= rta_fill_graph (graph);
}
}
-/* remove a graph, part II */
-/*
- Note: get_implementing_graph is not well defined here (graph->ent
- could overwrite more than one superclass implementation (graph).
- Since we *know* that this entity will not be called, this is OK.
-*/
-static void remove_irg (ir_graph *graph)
-{
- entity *ent = get_irg_entity (graph);
- peculiarity pec = get_entity_peculiarity (ent);
-
- /* DDMEO (get_irg_ent(graph)); */
-
- /* delete the ir_graph data */
- set_entity_peculiarity (ent, peculiarity_description);
- remove_irp_irg (graph);
- /* remove_irp_irg also removes the entities' reference to the graph */
- /*
- if (NULL != get_entity_irg (ent)) {
- set_entity_irg (ent, NULL);
- }
- */
- set_entity_peculiarity (ent, pec);
-
- /* find the implementation (graph) from *some* superclass: */
- graph = get_implementing_graph (ent);
-
- if (TRUE || (NULL == graph)) { /* always pretend to be 'abstract'; let the others figure this out */
- /* nothing to inherit! pretend we're abstract */
- force_description (ent, ent);
- } else {
- /* pretend that we inherit the implementation (graph) from some superclass: */
- set_entity_peculiarity (ent, peculiarity_inherited);
-
- exchange (get_atomic_ent_value (ent),
- get_atomic_ent_value (get_irg_ent(graph)));
- }
-}
-
/**
Initialise the static data structures.
*/
static void init_tables (void)
{
- _live_classes = eset_create ();
+ int i, n_globs = get_class_n_members(get_glob_type());
- _live_graphs = eset_create ();
+ _live_classes = eset_create ();
+ _live_graphs = eset_create ();
if (get_irp_main_irg ()) {
eset_insert (_live_graphs, get_irp_main_irg ());
}
- /* Adding the GlobalType is pointless, since its methods are always
- called via a constant */
- /*
- if (get_glob_type ()) {
- eset_insert (_live_classes, get_glob_type ());
+ /* Find static allocated classes */
+ for (i = 0; i < n_globs; ++i) {
+ type *member_type = get_entity_type(get_class_member(get_glob_type(), i));
+ if (is_class_type(member_type))
+ eset_insert(_live_classes, member_type);
}
- */
}
-/* Initialise the RTA data structures, and perform RTA.
- @param do_verbose If == 1, print statistics, if > 1, chatter about every detail
- @param do_whole_world Iff != 0, assume whole-world
-*/
-void rta_init (int do_verbose, int do_whole_world)
+/*
+ * Initialise the RTA data structures, and perform RTA.
+ * do_verbose If == 1, print statistics, if > 1, chatter about every detail
+ */
+void rta_init (int do_verbose)
{
int n_runs = 0;
tr_vrfy ();
# endif /* defined DEBUG_libfirm */
- whole_world = do_whole_world;
verbose = do_verbose;
init_tables ();
if (verbose) {
int n_live_graphs = stats ();
- if (whole_world) {
- printf ("RTA: whole-world assumption\n");
- }
printf ("RTA: n_graphs = %i\n", get_irp_n_irgs ());
printf ("RTA: n_live_graphs = %i\n", n_live_graphs);
printf ("RTA: n_runs = %i\n", n_runs);
# endif /* defined DEBUG_libfirm */
}
+/**
+ * walker for all types and entities
+ *
+ * Changes the peculiarity of entities that represents
+ * dead graphs to peculiarity_description.
+ */
+static void make_entity_to_description(type_or_ent *tore, void *env) {
+ if (get_kind(tore) == k_entity) {
+ entity *ent = (entity *)tore;
+
+ if ((is_method_type(get_entity_type(ent))) &&
+ (get_entity_peculiarity(ent) != peculiarity_description) &&
+ (get_entity_visibility(ent) != visibility_external_allocated) ) {
+ ir_graph *irg = get_entity_irg(get_SymConst_entity(get_atomic_ent_value(ent)));
+ if (!eset_contains (_live_graphs, irg)) {
+ set_entity_peculiarity(ent, peculiarity_description);
+ set_entity_irg(ent, NULL);
+ }
+ }
+ }
+}
+
/* Delete all graphs that we have found to be dead from the program
If verbose == 1, print statistics, if > 1, chatter about every detail
*/
if (!get_optimize() || !get_opt_dead_method_elimination()) return;
- eset *dead_graphs = eset_create ();
+ ir_graph *dead_graphs[get_irp_n_irgs()];
for (i = 0; i < n_graphs; i++) {
graph = get_irp_irg(i);
} else {
# ifdef DEBUG_libfirm
entity *ent = get_irg_entity (graph);
- assert (whole_world ||
- (visibility_external_visible != get_entity_visibility (ent)));
+ assert (visibility_external_visible != get_entity_visibility (ent));
# endif /* defined DEBUG_libfirm */
+ dead_graphs[n_dead_graphs] = graph;
n_dead_graphs ++;
- eset_insert (dead_graphs, graph);
}
}
- /* now delete the graphs. */
- for (graph = eset_first (dead_graphs);
- graph;
- graph = (ir_graph*) eset_next (dead_graphs)) {
-
- if ((verbose > 1) || get_opt_dead_method_elimination_verbose ()) {
- fprintf(stdout, "RTA: removing graph of ");
- DDMEO(get_irg_ent (graph));
- }
-
- remove_irg (graph);
+ type_walk(make_entity_to_description, NULL, NULL);
+ for (i = 0; i < n_dead_graphs; ++i) {
+ remove_irp_irg (dead_graphs[i]);
}
if (verbose) {
/* Say whether this graph might be run at any time in the program: */
int rta_is_alive_graph (ir_graph *graph)
{
- if (eset_contains (_live_graphs, graph)) {
- return (TRUE);
- }
-
- return (FALSE);
+ return eset_contains (_live_graphs, graph);
}
/* dump our opinion */
for (i = 0; i < get_irp_n_irgs(); i++) {
if (rta_is_alive_graph (get_irp_irg(i))) {
fprintf(stdout, "RTA: considered called: graph of ");
- DDMEO(get_irg_ent (get_irp_irg(i)));
+ DDMEO(get_irg_entity (get_irp_irg(i)));
}
}
}
/*
* $Log$
+ * Revision 1.24 2004/09/24 13:59:04 beck
+ * fixed doxygen comments, removed initialization for description entities
+ *
+ * Revision 1.23 2004/08/19 16:51:02 goetz
+ * fixed some errors, pushed closer to inteded firm semantics
+ *
+ * Revision 1.22 2004/08/13 08:57:15 beyhan
+ * normalized names of functions, enums ...
+ * added suffix as argument to dumpers, removed global variable
+ * removed support for tarval/Const
+ *
+ * Revision 1.21 2004/07/08 15:50:56 goetz
+ * firmstat added
+ *
+ * Revision 1.20 2004/07/08 11:17:40 goetz
+ * *** empty log message ***
+ *
* Revision 1.19 2004/07/06 12:30:37 beyhan
* new SymConst semantics
*
projects / libfirm / blobdiff