-/* -*- c -*- */
-
/*
- * Project: libFIRM
- * File name: ir/ana/rta.c
- * Purpose: Interprocedural analysis 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 is protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
+ *
+ * This file is part of libFirm.
+ *
+ * This file may be distributed and/or modified under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation and appearing in the file LICENSE.GPL included in the
+ * packaging of this file.
+ *
+ * Licensees holding valid libFirm Professional Edition licenses may use
+ * this file in accordance with the libFirm Commercial License.
+ * Agreement provided with the Software.
+ *
+ * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE.
*/
/**
- * Intraprozedurale Analyse zur Abschätzung der Aufrufrelation. Es
- * die Menge der instantiierten Klassen bestimmt, und daraus eine Abschätzung
- * der aufgerufenen Methoden bestimmt.
+ * @file
+ * @brief Interprocedural analysis to improve the call graph estimate.
+ * @author Florian
+ * @version 09.06.2002
+ * @version $Id$
*/
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include "config.h"
#include "rta.h"
#include "irnode_t.h"
#include "irprog_t.h"
+#include "irgraph_t.h"
#include "eset.h"
#include "irgwalk.h"
#include "irgmod.h"
#include "irvrfy.h"
-#include "trvrfy.h"
+#include "irprintf.h"
+
+# ifndef TRUE
+# define TRUE 1
+# define FALSE 0
+# endif /* not defined TRUE */
+
+/* flags */
+static int verbose = 0;
-# define TRUE 1
-# define FALSE 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)
+static ir_graph *get_implementing_graph (ir_entity *method)
{
- ir_graph *graph = get_entity_irg ((entity*) method);
-
- if (NULL == graph) {
- int i;
- int n_over = get_entity_n_overwrites ((entity*) method);
-
- for (i = 0; (NULL == graph) && (i < n_over); i ++) {
- entity *over = get_entity_overwrites ((entity*) method, i);
- graph = get_implementing_graph (over);
- }
- }
+ ir_graph *graph = NULL;
- /* we *must* always return a graph != NULL, *except* when we're used
- inside remove_irg or force_description */
- /* assert (graph && "no graph"); */
+ if (get_entity_peculiarity(method) != peculiarity_description)
+ graph = get_entity_irg(get_SymConst_entity(get_atomic_ent_value(method)));
- return (graph);
+ return graph;
}
+/**
+ * Add a graph to the set of live graphs.
+ *
+ * @param graph the graph to add
+ * @return non-zero if the graph was added, zero
+ * if it was already in the live set
+ */
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));
+ ir_fprintf(stdout, "RTA: new graph of %+F\n", graph);
}
eset_insert (_live_graphs, graph);
return (FALSE);
}
-static int add_class (type *clazz)
+/**
+ * Add a class to the set of live classes.
+ *
+ * @param clazz the class to add
+ * @return non-zero if the graph was added, zero
+ * if it was already in the live set
+ */
+static int add_class (ir_type *clazz)
{
if (!eset_contains (_live_classes, clazz)) {
- if (verbose > 1) {
- fprintf(stdout, "RTA: new class: ");
- DDMT(clazz);
- }
+ if (verbose > 1) {
+ ir_fprintf(stdout, "RTA: new class: %+F\n", 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)
+static int add_implementing_graphs (ir_entity *method)
{
int i;
int n_over = get_entity_n_overwrittenby (method);
}
if (verbose > 1) {
- fprintf(stdout, "RTA: new call to ");
- DDMEO(method);
+ ir_fprintf(stdout, "RTA: new call to %+F\n", method);
}
if (rta_is_alive_class (get_entity_owner (method))) {
}
for (i = 0; i < n_over; i ++) {
- entity *over = get_entity_overwrittenby (method, i);
+ ir_entity *over = get_entity_overwrittenby (method, i);
change |= add_implementing_graphs (over);
}
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;
-
- opcode op = get_irn_opcode (node);
+ ir_opcode op = get_irn_opcode (node);
if (iro_Call == op) { /* CALL */
- entity *ent = NULL;
+ ir_entity *ent = NULL;
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 external 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 SymConst! */
- if (graph) {
- *change = add_graph (graph);
- } else {
- /* it's an external allocated thing. */
- }
+ ir_graph *graph;
+
+ ent = get_SymConst_entity (ptr);
+ graph = get_entity_irg (ent);
+ if (graph) {
+ *change |= add_graph (graph);
+ } else {
+ /* 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"); */
+ /* Entities of kind addr_name may not be allocated in this compilation unit.
+ If so, the frontend built faulty Firm. So just ignore. */
+ /* if (get_SymConst_name(ptr) != new_id_from_str("iro_Catch"))
+ assert (ent && "couldn't determine entity of call to SymConst of kind addr_name."); */
} else {
- /* other symconst. */
+ /* other symconst. */
+ assert(0 && "This SymConst can not be an address for a method call.");
}
+ /* STRANGE */
+ } else {
+ 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);
+ ir_type *type = get_Alloc_type (node);
- *change = add_class (type);
+ *change |= add_class (type);
}
}
static int rta_fill_graph (ir_graph* graph)
{
int change = FALSE;
-
- current_ir_graph = graph;
-
- irg_walk (get_irg_end (graph), rta_act, NULL, &change);
-
- return (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.
+ */
static int rta_fill_incremental (void)
{
int i;
int n_runs = 0;
int rerun = TRUE;
- int old_ip_view = interprocedural_view;
+#ifdef INTERPROCEDURAL_VIEW
+ int old_ip_view = get_interprocedural_view();
- interprocedural_view = 0; /* save this for later */
+ set_interprocedural_view(0); /* save this for later */
+#endif
/* init_tables has added main_irg to _live_graphs */
for (i = 0; i < get_irp_n_irgs(); i++) {
ir_graph *graph = get_irp_irg (i);
- entity *ent = get_irg_entity (graph);
+ ir_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));
+ ir_fprintf(stdout, "RTA: RUN %i: considering graph of %+F\n", n_runs,
+ graph);
}
rerun |= rta_fill_graph (graph);
n_runs ++;
}
- interprocedural_view = old_ip_view; /* cover up our traces */
+#ifdef INTERPROCEDURAL_VIEW
+ set_interprocedural_view(old_ip_view); /* cover up our traces */
+#endif
return (n_runs);
}
-/*
- Count the number of graphs that we have found to be live.
-*/
+/**
+ * Count the number of graphs that we have found to be live.
+ */
static int stats (void)
{
int i;
abstract now. Pretend that it wasn't there at all, and every
entity that used to inherit this entity's graph is now abstract.
*/
-/* Since we *know* that this entity will not be called, this is OK. */
-static void force_description (entity *ent, entity *addr)
-{
- int i, n_over = get_entity_n_overwrittenby (ent);
-
- set_entity_peculiarity (ent, peculiarity_description);
-
- for (i = 0; i < n_over; i ++) {
- entity *over = get_entity_overwrittenby (ent, i);
-
- if (peculiarity_inherited == get_entity_peculiarity (over)) {
- /* We rely on the fact that cse is performed on the const_code_irg. */
- entity *my_addr = get_SymConst_entity(get_atomic_ent_value(over));
-
- if (addr == my_addr) {
- force_description (over, addr);
- }
- } else if (peculiarity_existent == get_entity_peculiarity (over)) {
- /* check whether 'over' forces 'inheritance' of *our* graph: */
- ir_node *f_addr = get_atomic_ent_value (over);
- entity *impl_ent = get_SymConst_entity (f_addr);
-
- assert ((get_irn_op(f_addr) == op_SymConst) && "can't do complex addrs");
- if (impl_ent == addr) {
- assert (0 && "gibt's denn sowas");
- force_description (over, addr);
- }
- }
- }
-}
-
-/* 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.
+ Initialize the static data structures.
*/
static void init_tables (void)
{
- _live_classes = eset_create ();
+ ir_type *tp;
+ int i, n;
- _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 */
+ tp = get_glob_type();
+ n = get_class_n_members(tp);
+ for (i = 0; i < n; ++i) {
+ ir_type *member_type = get_entity_type(get_class_member(tp, i));
+ if (is_Class_type(member_type))
+ eset_insert(_live_classes, member_type);
+ }
+
+ tp = get_tls_type();
+ n = get_struct_n_members(tp);
+ for (i = 0; i < n; ++i) {
+ ir_type *member_type = get_entity_type(get_struct_member(tp, 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)
+/*
+ * Initialize 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;
+ int rem_vpi = get_visit_pseudo_irgs();
+ set_visit_pseudo_irgs(1);
+
# ifdef DEBUG_libfirm
- int i;
- for (i = 0; i < get_irp_n_irgs(); i++) {
- irg_vrfy (get_irp_irg(i));
+ {
+ int i, n;
+ n = get_irp_n_irgs();
+ for (i = 0; i < n; i++) {
+ irg_vrfy (get_irp_irg(i));
+ }
+ tr_vrfy ();
}
- 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);
}
# ifdef DEBUG_libfirm
- for (i = 0; i < get_irp_n_irgs(); i++) {
- irg_vrfy (get_irp_irg(i));
+ {
+ int i, n;
+ n = get_irp_n_irgs();
+ for (i = 0; i < n; i++) {
+ irg_vrfy (get_irp_irg(i));
+ }
+ tr_vrfy ();
}
- tr_vrfy ();
# endif /* defined DEBUG_libfirm */
+
+ set_visit_pseudo_irgs(rem_vpi);
+}
+
+/**
+ * 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) {
+ (void) env;
+ if (is_entity(tore.ent)) {
+ ir_entity *ent = tore.ent;
+
+ 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
int n_graphs = get_irp_n_irgs ();
ir_graph *graph = NULL;
int n_dead_graphs = 0;
+ ir_graph **dead_graphs;
- if (!get_optimize() || !get_opt_dead_method_elimination()) return;
+ int rem_vpi = get_visit_pseudo_irgs();
+ set_visit_pseudo_irgs(1);
- eset *dead_graphs = eset_create ();
+ dead_graphs = XMALLOCN(ir_graph*, get_irp_n_irgs());
for (i = 0; i < n_graphs; i++) {
graph = get_irp_irg(i);
if (rta_is_alive_graph (graph)) {
/* do nothing (except some debugging fprintf`s :-) */
} else {
-# ifdef DEBUG_libfirm
- entity *ent = get_irg_entity (graph);
- assert (whole_world ||
- (visibility_external_visible != get_entity_visibility (ent)));
-# endif /* defined DEBUG_libfirm */
+#ifndef NDEBUG
+ ir_entity *ent = get_irg_entity (graph);
+ assert (visibility_external_visible != get_entity_visibility (ent));
+#endif
+ 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) {
printf ("RTA: n_dead_graphs = %i\n", n_dead_graphs);
}
+
+ set_visit_pseudo_irgs(rem_vpi);
+
+ free(dead_graphs);
}
/* Clean up the RTA data structures. Call this after calling rta_init */
}
/* Say whether this class might be instantiated at any point in the program: */
-int rta_is_alive_class (type *clazz)
+int rta_is_alive_class (ir_type *clazz)
{
return (eset_contains (_live_classes, clazz));
}
/* 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 */
int i;
for (i = 0; i < get_irp_n_types(); ++i) {
- type *tp = get_irp_type(i);
- if (is_class_type(tp) && rta_is_alive_class(tp)) {
- fprintf(stdout, "RTA: considered allocated: "); DDMT(tp);
+ ir_type *tp = get_irp_type(i);
+ if (is_Class_type(tp) && rta_is_alive_class(tp)) {
+ ir_fprintf(stdout, "RTA: considered allocated: %+F\n", tp);
}
}
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)));
+ ir_fprintf(stdout, "RTA: considered called: graph of %+F\n", get_irp_irg(i));
}
}
}
-
-
-/*
- * $Log$
- * 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
- *
- * Revision 1.18 2004/06/27 21:17:41 liekweg
- * Added comment
- *
- * Revision 1.17 2004/06/25 13:45:13 liekweg
- * observe stickyness; minor refactoring
- *
- * Revision 1.16 2004/06/24 06:42:14 goetz
- * test of firm flags
- *
- * Revision 1.15 2004/06/18 15:47:19 liekweg
- * minor bug fix (go forward, not backward) --flo
- *
- * Revision 1.14 2004/06/18 13:12:43 liekweg
- * final bug fix (calls via consts)
- *
- * Revision 1.13 2004/06/17 16:34:33 liekweg
- * removed DD*s
- *
- * Revision 1.12 2004/06/17 16:33:33 liekweg
- * minor bug fix
- *
- * Revision 1.11 2004/06/17 14:21:13 liekweg
- * major bugfix
- *
- * Revision 1.10 2004/06/17 10:31:41 goetz
- * irscc: bugfix, can now deal with loops not reachable from start
- * cgana: bugfix, skip_Tuple
- * rta: improved
- *
- * Revision 1.9 2004/06/17 08:56:03 liekweg
- * Fixed typos in comments
- *
- * Revision 1.8 2004/06/17 08:33:01 liekweg
- * Added comments; added remove_irg
- *
- * Revision 1.6 2004/06/14 13:02:03 goetz
- * bugfixesbug
- *
- * Revision 1.5 2004/06/13 15:03:45 liekweg
- * RTA auf Iterative RTA aufgebohrt --flo
- *
- * Revision 1.4 2004/06/12 19:35:04 liekweg
- * Kommentare eingef"ugt --flo
- *
- * Revision 1.3 2004/06/12 17:09:46 liekweg
- * RTA works, outedges breaks. "Yay." --flo
- *
- * Revision 1.2 2004/06/11 18:25:39 liekweg
- * Added todo
- *
- * Revision 1.1 2004/06/11 18:24:18 liekweg
- * Added RTA --flo
- *
- */
projects / libfirm / blobdiff