X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Fcgana.c;h=a1cf2240c9cb44f50c625759f1bcaf71d690e931;hb=f6aeac6a547a52beb3cb663c5e63c05c9c3728ea;hp=68799bc408823e0ee48d3dbde0c1a0a5a604138e;hpb=e78f164c3a0654b8567ff0fcba69b3ca68f07ab5;p=libfirm diff --git a/ir/ana/cgana.c b/ir/ana/cgana.c index 68799bc40..a1cf2240c 100644 --- a/ir/ana/cgana.c +++ b/ir/ana/cgana.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -50,6 +50,7 @@ #include "ircons.h" #include "irgmod.h" #include "iropt.h" +#include "irtools.h" #include "irflag_t.h" #include "dbginfo_t.h" @@ -58,6 +59,7 @@ #include "eset.h" #include "pmap.h" #include "array.h" +#include "error.h" #include "irdump.h" @@ -83,12 +85,12 @@ static eset *entities = NULL; /** Returns the entity that contains the implementation of the inherited * entity if available, else returns the entity passed. */ static ir_entity *get_inherited_methods_implementation(ir_entity *inh_meth) { - assert(get_atomic_ent_value(inh_meth) && "constant entity without value"); - assert((get_irn_op(get_atomic_ent_value(inh_meth)) == op_SymConst) && - (get_SymConst_kind(get_atomic_ent_value(inh_meth)) == symconst_addr_ent) && + ir_node *value = get_atomic_ent_value(inh_meth); + assert(value && "constant entity without value"); + assert(is_SymConst_addr_ent(value) && "Complex constant values not supported -- address of method should be straight constant!"); - return get_SymConst_entity(get_atomic_ent_value(inh_meth)); + return get_SymConst_entity(value); } /** Collect the entity representing the implementation of this @@ -180,93 +182,95 @@ static ir_entity ** get_impl_methods(ir_entity * method) { * as here we walk the type graph. In opt_polymorphy we only apply a local * pattern. * - * @param node The node to analyze - * @param env A map that maps names of entities to the entities. + * @param node The node to analyze + * @param env A map that maps names of entities to the entities. */ -static void sel_methods_walker(ir_node * node, void *env) { +static void sel_methods_walker(ir_node *node, void *env) { pmap *ldname_map = env; ir_entity **arr; /* Call standard optimizations */ if (is_Sel(node)) { ir_node *new_node = optimize_in_place(node); - if (node != new_node) + if (node != new_node) { exchange(node, new_node); + node = new_node; + } } /* replace SymConst(name)-operations by SymConst(ent) */ - if (get_irn_op(node) == op_SymConst) { + if (is_SymConst(node)) { if (get_SymConst_kind(node) == symconst_addr_name) { - pmap_entry * entry = pmap_find(ldname_map, (void *) get_SymConst_name(node)); + pmap_entry *entry = pmap_find(ldname_map, get_SymConst_name(node)); if (entry != NULL) { /* Method is declared in the compiled code */ - assert(0 && "There should not be a SymConst[addr_name] addressing a method with an implementation" + assert(!"There should not be a SymConst[addr_name] addressing a method with an implementation" "in this compilation unit. Use a SymConst[addr_ent]."); } } - } - else if (get_irn_op(node) == op_Sel && - is_Method_type(get_entity_type(get_Sel_entity(node)))) { - ir_entity * ent = get_SymConst_entity(get_atomic_ent_value(get_Sel_entity(node))); - assert(get_entity_peculiarity(ent) != peculiarity_inherited); - - if (!eset_contains(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); - } + } else 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))); + assert(get_entity_peculiarity(ent) != peculiarity_inherited); + + if (!eset_contains(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); + } - /* -- As an add on we get an optimization that removes polymorphic calls. - This optimization is more powerful than that in transform_node_Sel(). -- */ - arr = get_entity_link(ent); - if (arr == NULL) { - /* - * The Sel node never returns a pointer to a usable method. - * We could not call it, but it may be description: - * We call a method in a dead part of the program. - */ - assert (get_entity_peculiarity(ent) == peculiarity_description); - } - else if (get_opt_optimize() && get_opt_closed_world() && get_opt_dyn_meth_dispatch() && - (ARR_LEN(arr) == 1 && arr[0] != NULL)) { - ir_node *new_node; - - /* - * The Sel node returns only one possible method. - * So we could replace the Sel node by a SymConst. - * This method must exists. - */ - set_irg_current_block(current_ir_graph, get_nodes_block(node)); - assert(get_entity_peculiarity(get_SymConst_entity(get_atomic_ent_value(arr[0]))) == - peculiarity_existent); - new_node = copy_const_value(get_irn_dbg_info(node), get_atomic_ent_value(arr[0])); - DBG_OPT_POLY(node, new_node); - exchange(node, new_node); - } + /* -- As an add on we get an optimization that removes polymorphic calls. + This optimization is more powerful than that in transform_node_Sel(). -- */ + arr = get_entity_link(ent); + if (arr == NULL) { + /* + * The Sel node never returns a pointer to a usable method. + * We could not call it, but it may be description: + * We call a method in a dead part of the program. + */ + assert(get_entity_peculiarity(ent) == peculiarity_description); + } + else if (get_opt_closed_world() && get_opt_dyn_meth_dispatch() && + (ARR_LEN(arr) == 1 && arr[0] != NULL)) { + ir_node *new_node; + + /* + * The Sel node returns only one possible method. + * So we could replace the Sel node by a SymConst. + * This method must exists. + */ + set_irg_current_block(current_ir_graph, get_nodes_block(node)); + assert(get_entity_peculiarity(get_SymConst_entity(get_atomic_ent_value(arr[0]))) == + peculiarity_existent); + new_node = copy_const_value(get_irn_dbg_info(node), get_atomic_ent_value(arr[0])); + DBG_OPT_POLY(node, new_node); + exchange(node, new_node); + } } } -/** Initialize auxiliary data structures. +/** + * Initialize auxiliary data structures. * - * Computes a set of entities that overwrite an entity and contain - * an implementation. The set is stored in the entity's link field. + * Computes a set of entities that overwrite an entity and contain + * an implementation. The set is stored in the entity's link field. * - * Further replaces Sel nodes where this set contains exactly one - * method by SymConst nodes. - * Finally asserts if there is a SymConst(name) if there could be a - * SymConst(ent). */ + * Further replaces Sel nodes where this set contains exactly one + * method by SymConst nodes. + * Finally asserts if there is a SymConst(name) if there could be a + * SymConst(ent). + */ static void sel_methods_init(void) { int i; - pmap * ldname_map = pmap_create(); /* Map entity names to entities: to replace - SymConst(name) by SymConst(ent). */ + 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) { ir_entity * ent = get_irg_entity(get_irp_irg(i)); /* only external visible methods are allowed to call by a SymConst_ptr_name */ if (get_entity_visibility(ent) != visibility_local) { - pmap_insert(ldname_map, (void *) get_entity_ld_ident(ent), ent); + pmap_insert(ldname_map, (void *)get_entity_ld_ident(ent), ent); } } @@ -328,6 +332,7 @@ static ir_entity * get_Sel_method(ir_node * sel, int pos) { return arr[pos]; } +/* forward */ static void free_mark(ir_node * node, eset * set); static void free_mark_proj(ir_node * node, long n, eset * set) { @@ -343,7 +348,7 @@ static void free_mark_proj(ir_node * node, long n, eset * set) { * op_Tuple oder ein Knoten, der in "free_ana_walker" behandelt * wird. */ ir_node * pred = get_Proj_pred(node); - if (get_irn_link(pred) != MARK && get_irn_op(pred) == op_Tuple) { + if (get_irn_link(pred) != MARK && is_Tuple(pred)) { free_mark_proj(get_Tuple_pred(pred, get_Proj_proj(node)), n, set); } else { /* nothing: da in "free_ana_walker" behandelt. */ @@ -370,7 +375,7 @@ static void free_mark_proj(ir_node * node, long n, eset * set) { assert(0 && "unexpected opcode or opcode not implemented"); break; } - set_irn_link(node, NULL); + // set_irn_link(node, NULL); } /** @@ -394,18 +399,18 @@ static void free_mark(ir_node *node, eset * set) { switch (get_irn_opcode(node)) { case iro_Sel: { - ir_entity * ent = get_Sel_entity(node); - if (is_Method_type(get_entity_type(ent))) { + 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)); } } break; - } + } case iro_SymConst: if (get_SymConst_kind(node) == symconst_addr_ent) { - ir_entity * ent = get_SymConst_entity(node); - if (is_Method_type(get_entity_type(ent))) { + ir_entity *ent = get_SymConst_entity(node); + if (is_method_entity(ent)) { eset_insert(set, ent); } } else { @@ -419,17 +424,13 @@ static void free_mark(ir_node *node, eset * set) { free_mark(get_Phi_pred(node, i), set); } break; - case iro_Id: - free_mark(get_Id_pred(node), set); - break; case iro_Proj: free_mark_proj(get_Proj_pred(node), get_Proj_proj(node), set); break; default: - /* nothing: Wird unten behandelt! */ + /* nothing: */ break; } - set_irn_link(node, NULL); } /** @@ -454,9 +455,9 @@ static void free_ana_walker(ir_node *node, void *env) { case iro_Tuple: /* nothing */ break; - /* Sonderbehandlung, da der Funktionszeigereingang natürlich kein - * Verräter ist. */ case iro_Call: + /* 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) { ir_node *pred = get_Call_param(node, i); @@ -465,19 +466,61 @@ static void free_ana_walker(ir_node *node, void *env) { } } break; + default: /* other nodes: Alle anderen Knoten nehmen wir als Verräter an, bis * jemand das Gegenteil implementiert. */ - default: set_irn_link(node, MARK); for (i = get_irn_arity(node) - 1; i >= 0; --i) { - ir_node * pred = get_irn_n(node, i); + ir_node *pred = get_irn_n(node, i); if (mode_is_reference(get_irn_mode(pred))) { free_mark(pred, set); } } break; } - set_irn_link(node, NULL); +} + +/** + * 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. + * 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) +{ + ir_node *n; + size_t i; + + switch (initializer->kind) { + case IR_INITIALIZER_CONST: + 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_Method_type(get_entity_type(ent))) + eset_insert(set, ent); + } + return; + case IR_INITIALIZER_TARVAL: + case IR_INITIALIZER_NULL: + return; + case IR_INITIALIZER_COMPOUND: + for (i = 0; i < initializer->compound.n_initializers; ++i) { + ir_initializer_t *sub_initializer + = initializer->compound.initializers[i]; + add_method_address_inititializer(sub_initializer, set); + } + return; + } + panic("invalid initializer found"); } /** @@ -501,7 +544,9 @@ static void add_method_address(ir_entity *ent, eset *set) if (get_entity_variability(ent) == variability_uninitialized) return; - if (is_atomic_entity(ent)) { + if (ent->has_initializer) { + add_method_address_inititializer(get_entity_initializer(ent), set); + } else if (is_atomic_entity(ent)) { tp = get_entity_type(ent); /* ignore methods: these of course reference it's address */ @@ -510,8 +555,8 @@ static void add_method_address(ir_entity *ent, eset *set) /* let's check if it's the address of a function */ n = get_atomic_ent_value(ent); - if (is_SymConst(n) && get_SymConst_kind(n) == symconst_addr_ent) { - ent = get_SymConst_entity(n); + if (is_Global(n)) { + ent = get_Global_entity(n); if (is_Method_type(get_entity_type(ent))) eset_insert(set, ent); @@ -521,8 +566,8 @@ static void add_method_address(ir_entity *ent, eset *set) n = get_compound_ent_value(ent, i); /* let's check if it's the address of a function */ - if (is_SymConst(n) && get_SymConst_kind(n) == symconst_addr_ent) { - ir_entity *ent = get_SymConst_entity(n); + if (is_Global(n)) { + ir_entity *ent = get_Global_entity(n); if (is_Method_type(get_entity_type(ent))) eset_insert(set, ent); @@ -541,52 +586,55 @@ static void add_method_address(ir_entity *ent, eset *set) * umgewandelt worden sein, d.h. SymConst-Operationen verweisen immer * auf eine echt externe Methode. */ -static ir_entity ** get_free_methods(void) +static ir_entity **get_free_methods(int *length) { eset *free_set = eset_create(); int i; - ir_entity **arr = NEW_ARR_F(ir_entity *, 0); + ir_entity **arr; ir_entity *ent; ir_graph *irg; - ir_type *glob; + ir_type *tp; for (i = get_irp_n_irgs() - 1; i >= 0; --i) { irg = get_irp_irg(i); ent = get_irg_entity(irg); - /* insert "external visible" methods. */ if (get_entity_visibility(ent) != visibility_local) { + /* insert non-local (external) methods. */ eset_insert(free_set, ent); - } - /* Finde alle Methoden die in dieser Methode extern sichtbar werden, - z.B. da die Adresse einer Methode abgespeichert wird. */ - irg_walk_graph(irg, NULL, free_ana_walker, free_set); - } - - /* insert sticky methods, too */ - for (i = get_irp_n_irgs() - 1; i >= 0; --i) { - ent = get_irg_entity(get_irp_irg(i)); - /* insert "sticky" methods. */ - if (get_entity_stickyness (ent) == stickyness_sticky) { + } else if (get_entity_stickyness(ent) == stickyness_sticky) { + /* insert "sticky" methods. */ eset_insert(free_set, ent); } + + ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK); + /* Find all method entities that gets "visible" through this graphs, + * for instance because their address is stored. */ + irg_walk_graph(irg, firm_clear_link, free_ana_walker, free_set); + ir_free_resources(irg, IR_RESOURCE_IRN_LINK); } /* insert all methods that are used in global variables initializers */ - glob = get_glob_type(); - for (i = get_class_n_members(glob) - 1; i >= 0; --i) { - ent = get_class_member(glob, i); - + tp = get_glob_type(); + for (i = get_class_n_members(tp) - 1; i >= 0; --i) { + ent = get_class_member(tp, i); + add_method_address(ent, free_set); + } + tp = get_tls_type(); + for (i = get_struct_n_members(tp) - 1; i >= 0; --i) { + ent = get_struct_member(tp, i); 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) + if (irg != NULL) eset_insert(free_set, get_irg_entity(irg)); /* Finally, transform the set into an array. */ - for (ent = eset_first(free_set); ent; ent = eset_next(free_set)) { - ARR_APP1(ir_entity *, arr, ent); + *length = eset_count(free_set); + arr = XMALLOCN(ir_entity*, *length); + for (i = 0, ent = eset_first(free_set); ent; ent = eset_next(free_set)) { + arr[i++] = ent; } eset_destroy(free_set); @@ -599,7 +647,7 @@ static ir_entity ** get_free_methods(void) static void callee_ana_node(ir_node * node, eset * methods); -static void callee_ana_proj(ir_node * node, long n, eset * methods) { +static void callee_ana_proj(ir_node *node, long n, eset *methods) { assert(get_irn_mode(node) == mode_T); if (get_irn_link(node) == MARK) { /* already visited */ @@ -612,31 +660,25 @@ static void callee_ana_proj(ir_node * node, long n, eset * methods) { /* proj_proj: in einem "sinnvollen" Graphen kommt jetzt ein * op_Tuple oder ein Knoten, der eine "freie Methode" * zurückgibt. */ - ir_node * pred = get_Proj_pred(node); + ir_node *pred = get_Proj_pred(node); if (get_irn_link(pred) != MARK) { - if (get_irn_op(pred) == op_Tuple) { + if (is_Tuple(pred)) { callee_ana_proj(get_Tuple_pred(pred, get_Proj_proj(node)), n, methods); } else { - eset_insert(methods, MARK); /* free method -> unknown */ + eset_insert(methods, unknown_entity); /* free method -> unknown */ } } break; - } + } case iro_Tuple: callee_ana_node(get_Tuple_pred(node, n), methods); break; - case iro_Id: - callee_ana_proj(get_Id_pred(node), n, methods); - break; - default: - eset_insert(methods, MARK); /* free method -> unknown */ + eset_insert(methods, unknown_entity); /* free method -> unknown */ break; } - - set_irn_link(node, NULL); } /** @@ -659,28 +701,28 @@ static void callee_ana_node(ir_node *node, eset *methods) { switch (get_irn_opcode(node)) { case iro_Const: /* A direct address call. We tread this as an external - call and ignore it completely. */ - eset_insert(methods, MARK); /* free method -> unknown */ + call and ignore it completely. */ + eset_insert(methods, unknown_entity); /* free method -> unknown */ break; case iro_SymConst: if (get_SymConst_kind(node) == symconst_addr_ent) { ir_entity *ent = get_SymConst_entity(node); - assert(ent && is_Method_type(get_entity_type(ent))); + assert(ent && is_method_entity(ent)); eset_insert(methods, ent); } else { assert(get_SymConst_kind(node) == symconst_addr_name); - /* externe Methode (wegen fix_symconst!) */ - eset_insert(methods, MARK); /* free method -> unknown */ + /* external method (because fix_symconst()!) */ + eset_insert(methods, unknown_entity); /* free method -> unknown */ } break; case iro_Sel: - /* polymorphe Methode */ + /* polymorphic method */ for (i = get_Sel_n_methods(node) - 1; i >= 0; --i) { - ir_entity * ent = get_Sel_method(node, i); - if (ent) { + ir_entity *ent = get_Sel_method(node, i); + if (ent != NULL) { eset_insert(methods, ent); } else { - eset_insert(methods, MARK); + eset_insert(methods, unknown_entity); } } break; @@ -700,13 +742,6 @@ static void callee_ana_node(ir_node *node, eset *methods) { callee_ana_node(get_Mux_true(node), methods); break; - case iro_Psi: - for (i = get_Psi_n_conds(node) - 1; i >= 0; --i) { - callee_ana_node(get_Psi_val(node, i), methods); - } - callee_ana_node(get_Psi_default(node), methods); - break; - case iro_Id: callee_ana_node(get_Id_pred(node), methods); break; @@ -719,60 +754,39 @@ static void callee_ana_node(ir_node *node, eset *methods) { case iro_Sub: case iro_Conv: /* extern */ - eset_insert(methods, MARK); /* free method -> unknown */ + eset_insert(methods, unknown_entity); /* free method -> unknown */ break; default: assert(0 && "invalid opcode or opcode not implemented"); break; } - - set_irn_link(node, NULL); } /** - * Walker: Analyses every call node and calculates an array of possible + * Walker: Analyses every Call node and calculates an array of possible * callees for that call. */ -static void callee_walker(ir_node * call, void * env) { +static void callee_walker(ir_node *call, void *env) { (void) env; if (is_Call(call)) { - eset * methods = eset_create(); - ir_entity * ent; - ir_entity ** arr = NEW_ARR_F(ir_entity *, 0); - assert(get_irn_op(get_Call_ptr(call)) != op_Id); + eset *methods = eset_create(); + ir_entity *ent; + ir_entity **arr; + int i; + callee_ana_node(get_Call_ptr(call), methods); - if (eset_contains(methods, MARK)) { /* unknown method */ - ARR_APP1(ir_entity *, arr, unknown_entity); - } - for (ent = eset_first(methods); ent; ent = eset_next(methods)) { - if (ent != MARK) { - ARR_APP1(ir_entity *, arr, ent); + arr = NEW_ARR_F(ir_entity *, eset_count(methods)); + for (i = 0, ent = eset_first(methods); ent; ent = eset_next(methods)) { + arr[i] = ent; + /* we want the unknown_entity on the zero position for easy tests later */ + if (ent == unknown_entity) { + arr[i] = arr[0]; + arr[0] = unknown_entity; } + ++i; } -#if 0 /* This generates Bad nodes when we don't want it. - Call it with a check for valid cgana information in local_optimize. */ - if (ARR_LEN(arr) == 0 && get_opt_optimize() && get_opt_closed_world() && get_opt_dyn_meth_dispatch()) { - /* Kann vorkommen, wenn der Vorgänger beispielsweise eine - * Sel-Operation war, die keine Methoden zurückgeben - * konnte. Wir ersetzen die Call-Operation ebenfalls durch - * eine Bad-Operation. Die Verlinkung muss wiederhergestellt - * werden! */ - ir_node *mem = get_Call_mem(call); - ir_node *blk = get_nodes_block(call); - turn_into_tuple (call, pn_Call_max); - set_Tuple_pred(call, pn_Call_M_regular , mem); - set_Tuple_pred(call, pn_Call_T_result , new_Bad()); - set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad()); - set_Tuple_pred(call, pn_Call_X_regular , new_r_Jmp(current_ir_graph, blk)); - set_Tuple_pred(call, pn_Call_X_except , new_Bad()); /* new_Jmp() ?? new_Raise() ?? */ - set_Tuple_pred(call, pn_Call_M_except , new_Bad()); - - } else -#endif - { - set_Call_callee_arr(call, ARR_LEN(arr), arr); - } + set_Call_callee_arr(call, ARR_LEN(arr), arr); DEL_ARR_F(arr); eset_destroy(methods); } @@ -791,13 +805,14 @@ static void remove_Tuples(ir_node *proj, void *env) { } -/* Bestimmt für jede Call-Operation die Menge der aufrufbaren Methode - * und speichert das Ergebnis in der Call-Operation. (siehe - * "set_Call_callee"). "sel_methods" wird für den Aufbau benötigt und - * muss bereits aufgebaut sein. */ +/** + * Determine for every Call the set of possibly called methods and stores it + * inside the Call (@see set_Call_callee()). + * Uses the sel_methods set with much be already calculated. + */ static void callee_ana(void) { int i; - /* Alle Graphen analysieren. */ + /* analyse all graphs */ for (i = get_irp_n_irgs() - 1; i >= 0; --i) { ir_graph *irg = get_irp_irg(i); irg_walk_graph(irg, callee_walker, remove_Tuples, NULL); @@ -841,23 +856,11 @@ static void destruct_walker(ir_node * node, void * env) { /*--------------------------------------------------------------------------*/ void cgana(int *length, ir_entity ***free_methods) { - ir_entity ** free_meths, **p; - /* Optimize Sel/SymConst nodes and compute all methods that implement an entity. */ sel_methods_init(); - free_meths = get_free_methods(); + *free_methods = get_free_methods(length); callee_ana(); sel_methods_dispose(); - - /* Convert the flexible array to an array that can be handled - by standard C. */ - p = xmalloc(sizeof(*p) * ARR_LEN(free_meths)); - memcpy(p, free_meths, ARR_LEN(free_meths) * sizeof(*p)); - - *length = ARR_LEN(free_meths); - *free_methods = p; - - DEL_ARR_F(free_meths); } void free_callee_info(ir_graph *irg) {