+/* -*- c -*- */
+
+/*
+ * Project: libFIRM
+ * File name: ir/ana/rta.c
+ * Purpose: Intraprozedural analyses to improve the call graph estimate.
+ * Author: Florian
+ * Modified by:
+ * Created: 09.06.2002
+ * CVS-ID: $$
+ * Copyright: (c) 1999-2004 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ */
+
+/**
+ * Intraprozedurale Analyse zur Abschätzung der Aufrufrelation. Es
+ * die Menge der instantiierten Klassen bestimmt, und daraus existierende Methoden
+ * bestimmt.
+ */
+
+#include "rta.h"
+
+# define TRUE 1
+# define FALSE 0
+
+/* # define RTA_SET */
+# ifdef RTA_SET
+typedef struct rta_set_elt
+{
+ struct rta_set_elt *_next;
+ void *_obj;
+} rta_set_elt_t;
+
+typedef struct rta_set
+{
+ rta_set_elt_t *_list;
+} rta_set_t;
+
+# define SET_T rta_set_t
+
+# else /* if defined RTA_SET */
+# define SET_T eset
+# define new_set eset_create
+# define delete_set(SET) eset_destroy(SET)
+# define set_insert(SET,ELT) eset_insert(SET,ELT)
+# define set_contains(SET,ELT) eset_contains(SET,ELT)
+# endif /* defined RTA_SET */
+
+static SET_T *_live_classes = NULL;
+static SET_T *_live_fields = NULL;
+static SET_T *_called_methods = NULL;
+
+/* cache computed results */
+static SET_T *_live_graphs = NULL;
+static SET_T *_dead_graphs = NULL;
+
+# ifdef RTA_SET
+/* Reinvent the wheel, err, set. */
+/* eset uses obstacks, which fucks up the graph somehow */
+static rta_set_t *new_set ()
+{
+ rta_set_t *set = (rta_set_t*) xmalloc (sizeof (rta_set_t));
+
+ set->_list = NULL;
+
+ return (set);
+}
+
+static void delete_set (rta_set_t *set)
+{
+ rta_set_elt_t *elt = set->_list;
+
+ while (NULL != elt) {
+ rta_set_elt_t *old = elt;
+ elt = elt->_next;
+
+ old->_next = NULL;
+ old->_obj = NULL;
+ free (old);
+ }
+
+ free (set);
+}
+
+static void set_insert (rta_set_t *set, void *obj)
+{
+ rta_set_elt_t *elt = (rta_set_elt_t*) xmalloc (sizeof (rta_set_elt_t));
+
+ elt->_obj = obj;
+ elt->_next = set->_list;
+ set->_list = elt;
+}
+
+static int set_contains (rta_set_t *set, void *obj)
+{
+ rta_set_elt_t *elt = set->_list;
+
+ while (NULL != elt) {
+ if (elt->_obj == obj) {
+ return (TRUE);
+ }
+
+ elt = elt->_next;
+ }
+
+ return (FALSE);
+}
+# endif /* defined RTA_SET */
+
+/* now the meat */
+
+static void rta_act (ir_node *node, void *env)
+{
+ opcode op = get_irn_opcode (node);
+
+ if (iro_Call == op) {
+ entity *ent = NULL;
+
+ ir_node *ptr = get_Call_ptr (node);
+ // test: ptr.op == Const
+
+ if (iro_Sel == get_irn_opcode (ptr)) {
+ ent = get_Sel_entity (ptr);
+ set_insert (_called_methods, ent);
+ }
+
+ if (ent) {
+ }
+ } else if (iro_Load == op) {
+ ir_node *ptr = get_Load_ptr (node);
+ entity *ent = NULL;
+
+ if (iro_Sel == get_irn_opcode (ptr)) {
+ ent = get_Sel_entity (ptr);
+ }
+ if (ent) {
+ set_insert (_live_fields, ent);
+ }
+ } else if (iro_Store == op) {
+ ir_node *ptr = get_Store_ptr (node);
+ entity *ent = NULL;
+
+ if (iro_Sel == get_irn_opcode (ptr)) {
+ ent = get_Sel_entity (ptr);
+ }
+ if (ent) {
+ set_insert (_live_fields, ent);
+ }
+ } else if (iro_Alloc == op) {
+ type *type = get_Alloc_type (node);
+ set_insert (_live_classes, type);
+ }
+}
+
+static void rta_fill_graph (ir_graph* graph)
+{
+ irg_walk (get_irg_end_block (graph), rta_act, NULL, NULL);
+}
+
+static void rta_fill_all ()
+{
+ int i;
+
+ for (i = 0; i < get_irp_n_irgs(); i++) {
+ rta_fill_graph (get_irp_irg (i));
+ }
+}
+
+static int is_call_target (entity *method)
+{
+ return (TRUE);
+}
+
+
+static ir_graph *get_implementing_graph (entity *method)
+{
+ ir_graph *graph = get_entity_irg (method);
+
+ if (NULL == graph) {
+ int i;
+ int n_over = get_entity_n_overwrites (method);
+
+ for (i = 0; (NULL == graph) && (i < n_over); i ++) {
+ entity *over = get_entity_overwrites (method, i);
+ graph = get_implementing_graph (over);
+ }
+ }
+
+ assert (graph && "no graph");
+
+ return (graph);
+}
+
+static int has_live_call (entity *method, ir_graph *graph)
+{
+ int has_call = FALSE;
+ int i, n_over;
+
+ if (get_irg_ent (graph) != method) {
+ return (FALSE);
+ }
+
+ if (is_call_target (method)) {
+ return (TRUE);
+ }
+
+ n_over = get_entity_n_overwrittenby (method);
+ for (i = 0; !has_call && (i < n_over); i ++) {
+ entity *over = get_entity_overwrittenby(method, i);
+ has_call |= has_live_call (over, graph);
+ }
+
+ return (has_call);
+}
+
+static int has_graph (type *clazz, ir_graph *graph)
+{
+ int has_the_graph = FALSE;
+ int i;
+ int n_sub;
+
+ if (set_contains (_live_classes, clazz)) {
+ int n_meth = get_class_n_members (clazz);
+
+ for (i = 0; i < n_meth; i ++) {
+ entity *member = get_class_member (clazz, i);
+ if (is_method_type (get_entity_type (member))) {
+ ir_graph *impl = get_entity_irg (member);
+
+ if (impl == graph) {
+ return (TRUE);
+ }
+ } /* is_method */
+ } /* all methods */
+ } /* _live_classes.contains (clazz) */
+
+ n_sub = get_class_n_subtypes (clazz);
+ for (i = 0; !has_the_graph && (i < n_sub); i ++) {
+ type *sub = get_class_subtype (clazz, i);
+
+ has_the_graph |= has_graph (sub, graph);
+ }
+
+ return (has_the_graph);
+}
+
+static int has_live_class (entity *method, ir_graph *graph)
+{
+ int has_class = FALSE;
+ int i;
+ int n_over;
+ type *clazz;
+
+ if (get_implementing_graph (method) != graph) {
+ return (FALSE);
+ }
+
+ clazz = get_entity_owner (method);
+ if (has_graph (clazz, graph)) {
+ return (TRUE);
+ }
+
+ n_over = get_entity_n_overwrittenby (method);
+ for (i = 0; !has_class && (i < n_over); i ++) {
+ entity *over = get_entity_overwrittenby (method, i);
+ has_class |= has_live_class (over, graph);
+ }
+
+ return (has_class);
+}
+
+
+void rta_init ()
+{
+ fprintf (stdout, "BEGIN %s(%i): %s\n", __FILE__, __LINE__, __FUNCTION__);
+
+ _live_classes = new_set ();
+ _live_fields = new_set ();
+ _called_methods = new_set ();
+
+ _live_graphs = new_set ();
+ _dead_graphs = new_set ();
+
+ fprintf (stdout, "FILL %s(%i): %s\n", __FILE__, __LINE__, __FUNCTION__);
+ rta_fill_all ();
+ fprintf (stdout, "DONE %s(%i): %s\n", __FILE__, __LINE__, __FUNCTION__);
+
+ /*
+ * shold be:
+ * rta_fill_queue ()
+ */
+}
+
+void rta_cleanup ()
+{
+ if (_live_classes) {
+ delete_set (_live_classes);
+ _live_classes = NULL;
+ }
+
+ if (_live_fields) {
+ delete_set (_live_fields);
+ _live_fields = NULL;
+ }
+
+ if (_called_methods) {
+ delete_set (_called_methods);
+ _called_methods = NULL;
+ }
+
+ if (_live_graphs) {
+ delete_set (_live_graphs);
+ _live_graphs = NULL;
+ }
+
+ if (_dead_graphs) {
+ delete_set (_dead_graphs);
+ _dead_graphs = NULL;
+ }
+}
+
+int rta_is_alive_class (type *clazz)
+{
+ return (set_contains (_live_classes, clazz));
+}
+
+int rta_is_alive_graph (ir_graph *graph)
+{
+ if (set_contains (_live_graphs, graph)) {
+ return (TRUE);
+ }
+
+ if (set_contains (_dead_graphs, graph)) {
+ return (FALSE);
+ }
+
+ entity *meth = get_irg_ent (graph);
+
+ if (has_live_call (meth, graph) && has_live_class (meth, graph)) {
+ set_insert (_live_graphs, graph);
+
+ return (TRUE);
+ } else {
+ set_insert (_dead_graphs, graph);
+
+ return (FALSE);
+ }
+}
+
+int rta_is_alive_field (entity *field)
+{
+ return (set_contains (_live_fields, field));
+}
+
+
+
+/*
+ * $Log$
+ * Revision 1.1 2004/06/11 18:24:18 liekweg
+ * Added RTA --flo
+ *
+ */