X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Frta.c;h=9b1276e739b6a89cbc6294bf1ec0f1f40968e73b;hb=4afdd22d55e88960e79760b6193253534ce298f1;hp=3728f80c512fbac3bbc000d30c3dcc05f59e86a5;hpb=7813122b10e9d5478781150907c41d67dbb34878;p=libfirm diff --git a/ir/ana/rta.c b/ir/ana/rta.c index 3728f80c5..9b1276e73 100644 --- a/ir/ana/rta.c +++ b/ir/ana/rta.c @@ -1,26 +1,30 @@ -/* -*- 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 -#endif +#include "config.h" #include "rta.h" @@ -28,15 +32,22 @@ #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; @@ -44,39 +55,31 @@ 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); @@ -86,13 +89,19 @@ static int add_graph (ir_graph *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); @@ -101,12 +110,12 @@ static int add_class (type *clazz) 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); @@ -118,8 +127,7 @@ static int add_implementing_graphs (entity *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))) { @@ -129,65 +137,64 @@ static int add_implementing_graphs (entity *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); } } @@ -198,27 +205,22 @@ static void rta_act (ir_node *node, void *env) 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 */ @@ -227,12 +229,12 @@ static int rta_fill_incremental (void) 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); } } @@ -251,14 +253,13 @@ static int rta_fill_incremental (void) 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); @@ -269,14 +270,16 @@ static int rta_fill_incremental (void) 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; @@ -300,115 +303,62 @@ static int stats (void) 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 (); @@ -418,20 +368,46 @@ void rta_init (int do_verbose, int do_whole_world) 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 @@ -443,10 +419,12 @@ void rta_delete_dead_graphs (void) 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); @@ -454,33 +432,28 @@ void rta_delete_dead_graphs (void) 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 */ @@ -506,7 +479,7 @@ void rta_cleanup (void) } /* 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)); } @@ -514,11 +487,7 @@ int rta_is_alive_class (type *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 */ @@ -527,83 +496,15 @@ void rta_report (void) 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 - * - */