X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firmemory.c;h=bbf1a6f50d007434d7b46725eae6d004f5f429e2;hb=070134aa742484085c66db733a759aa3316dbf24;hp=d9b7a58c24708f91ad4fc482aa4df04f794e22f8;hpb=ce6161a7e42a48f7422b7babcc64d8ace18e2687;p=libfirm diff --git a/ir/ana/irmemory.c b/ir/ana/irmemory.c index d9b7a58c2..bbf1a6f50 100644 --- a/ir/ana/irmemory.c +++ b/ir/ana/irmemory.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -77,19 +77,25 @@ unsigned get_irg_memory_disambiguator_options(const ir_graph *irg) if (opt & aa_opt_inherited) return global_mem_disamgig_opt; return opt; -} /* get_irg_memory_disambiguator_options */ +} /* Set the memory disambiguator options for a graph. */ void set_irg_memory_disambiguator_options(ir_graph *irg, unsigned options) { irg->mem_disambig_opt = options & ~aa_opt_inherited; -} /* set_irg_memory_disambiguator_options */ +} /* Set the global disambiguator options for all graphs not having local options. */ void set_irp_memory_disambiguator_options(unsigned options) { global_mem_disamgig_opt = options; -} /* set_irp_memory_disambiguator_options */ +} + +/* Get the base storage class (ignore modifier) */ +ir_storage_class_class_t get_base_sc(ir_storage_class_class_t x) +{ + return x & ~ir_sc_modifiers; +} /** * Find the base address and entity of an Sel node. @@ -109,7 +115,7 @@ static ir_node *find_base_adr(const ir_node *sel, ir_entity **pEnt) } *pEnt = get_Sel_entity(sel); return ptr; -} /* find_base_adr */ +} /** * Check if a given Const node is greater or equal a given size. @@ -127,8 +133,8 @@ static ir_alias_relation check_const(const ir_node *cns, int size) if (size == 0) return tarval_is_null(tv) ? ir_may_alias : ir_no_alias; tv_size = new_tarval_from_long(size, get_tarval_mode(tv)); - return tarval_cmp(tv_size, tv) & (pn_Cmp_Eq|pn_Cmp_Lt) ? ir_no_alias : ir_may_alias; -} /* check_const */ + return tarval_cmp(tv_size, tv) & (ir_relation_less_equal) ? ir_no_alias : ir_may_alias; +} /** * Treat idx1 and idx2 as integer indexes and check if they differ always more than size. @@ -195,7 +201,7 @@ static ir_alias_relation different_index(const ir_node *idx1, const ir_node *idx } else { tv_size = new_tarval_from_long(size, m2); - if (tarval_cmp(tv2, tv_size) & (pn_Cmp_Eq|pn_Cmp_Gt)) { + if (tarval_cmp(tv2, tv_size) & (ir_relation_greater_equal)) { /* tv1 is negative and tv2 >= tv_size, so the difference is bigger than size */ return ir_no_alias; } @@ -209,11 +215,11 @@ static ir_alias_relation different_index(const ir_node *idx1, const ir_node *idx tv1 = tarval_convert_to(tv1, m2); /* now we can compare without overflow */ - return tarval_cmp(tv1, tv2) & (pn_Cmp_Eq|pn_Cmp_Gt) ? ir_no_alias : ir_may_alias; + return tarval_cmp(tv1, tv2) & (ir_relation_greater_equal) ? ir_no_alias : ir_may_alias; } } } - if (tarval_cmp(tv1, tv2) == pn_Cmp_Gt) { + if (tarval_cmp(tv1, tv2) == ir_relation_greater) { ir_tarval *t = tv1; tv1 = tv2; tv2 = t; @@ -221,7 +227,7 @@ static ir_alias_relation different_index(const ir_node *idx1, const ir_node *idx /* tv1 is now the "smaller" one */ tv = tarval_sub(tv2, tv1, NULL); tv_size = new_tarval_from_long(size, get_tarval_mode(tv)); - return tarval_cmp(tv_size, tv) & (pn_Cmp_Eq|pn_Cmp_Lt) ? ir_no_alias : ir_may_alias; + return tarval_cmp(tv_size, tv) & (ir_relation_less_equal) ? ir_no_alias : ir_may_alias; } /* Note: we rely here on the fact that normalization puts constants on the RIGHT side */ @@ -292,7 +298,7 @@ static ir_alias_relation different_index(const ir_node *idx1, const ir_node *idx } return ir_may_alias; -} /* different_index */ +} /** * Two Sel addresses have the same base address, check if there offsets are @@ -348,7 +354,7 @@ static ir_alias_relation different_sel_offsets(const ir_node *sel1, const ir_nod (void) different_index; #endif return ir_may_alias; -} /* different_sel_offsets */ +} /** * Determine the alias relation by checking if adr1 and adr2 are pointer @@ -361,13 +367,13 @@ static ir_alias_relation different_types(const ir_node *adr1, const ir_node *adr { ir_entity *ent1 = NULL, *ent2 = NULL; - if (is_Global(adr1)) - ent1 = get_Global_entity(adr1); + if (is_SymConst_addr_ent(adr1)) + ent1 = get_SymConst_entity(adr1); else if (is_Sel(adr1)) ent1 = get_Sel_entity(adr1); - if (is_Global(adr2)) - ent2 = get_Global_entity(adr2); + if (is_SymConst_addr_ent(adr2)) + ent2 = get_SymConst_entity(adr2); else if (is_Sel(adr2)) ent2 = get_Sel_entity(adr2); @@ -398,7 +404,7 @@ static ir_alias_relation different_types(const ir_node *adr1, const ir_node *adr } } return ir_may_alias; -} /* different_types */ +} /** * Returns non-zero if a node is a result on a malloc-like routine. @@ -414,34 +420,31 @@ static int is_malloc_Result(const ir_node *node) if (! is_Call(node)) return 0; node = get_Call_ptr(node); - if (is_Global(node)) { - ir_entity *ent = get_Global_entity(node); + if (is_SymConst_addr_ent(node)) { + ir_entity *ent = get_SymConst_entity(node); if (get_entity_additional_properties(ent) & mtp_property_malloc) return 1; return 0; } return 0; -} /* is_malloc_Result */ +} ir_storage_class_class_t classify_pointer(const ir_node *irn, const ir_entity *ent) { ir_graph *irg = get_irn_irg(irn); ir_storage_class_class_t res = ir_sc_pointer; - if (is_Global(irn)) { - ir_entity *entity = get_Global_entity(irn); - res = ir_sc_globalvar; + if (is_SymConst_addr_ent(irn)) { + ir_entity *entity = get_SymConst_entity(irn); + ir_type *owner = get_entity_owner(entity); + res = owner == get_tls_type() ? ir_sc_tls : ir_sc_globalvar; if (! (get_entity_usage(entity) & ir_usage_address_taken)) res |= ir_sc_modifier_nottaken; } else if (irn == get_irg_frame(irg)) { res = ir_sc_localvar; if (ent != NULL && !(get_entity_usage(ent) & ir_usage_address_taken)) res |= ir_sc_modifier_nottaken; - } else if (irn == get_irg_tls(irg)) { - res = ir_sc_tls; - if (ent != NULL && !(get_entity_usage(ent) & ir_usage_address_taken)) - res |= ir_sc_modifier_nottaken; } else if (is_Proj(irn) && is_malloc_Result(irn)) { return ir_sc_malloced; } else if (is_Const(irn)) { @@ -561,7 +564,7 @@ static ir_alias_relation _get_alias_relation( /* * Bitfields can be constructed as Sels from its base address. * As they have different entities, the disambiguator would find that they are - * alias free. While this is true for it's values, it is false for the addresses + * alias free. While this is true for its values, it is false for the addresses * (strictly speaking, the Sel's are NOT the addresses of the bitfields). * So, skip those bitfield selecting Sel's. */ @@ -594,6 +597,16 @@ static ir_alias_relation _get_alias_relation( class1 = get_base_sc(mod1); class2 = get_base_sc(mod2); + /* struct-access cannot alias with variables */ + if (ent1 == NULL && ent2 != NULL && is_compound_type(get_entity_owner(ent2)) + && (class1 == ir_sc_globalvar || class1 == ir_sc_localvar || class1 == ir_sc_tls || class1 == ir_sc_globaladdr)) { + return ir_no_alias; + } + if (ent2 == NULL && ent1 != NULL && is_compound_type(get_entity_owner(ent1)) + && (class2 == ir_sc_globalvar || class2 == ir_sc_localvar || class2 == ir_sc_tls || class2 == ir_sc_globaladdr)) { + return ir_no_alias; + } + if (class1 == ir_sc_pointer || class2 == ir_sc_pointer) { /* swap pointer class to class1 */ if (class2 == ir_sc_pointer) { @@ -682,7 +695,7 @@ leave_type_based_alias:; /* access points-to information here */ return ir_may_alias; -} /* _get_alias_relation */ +} /* * Determine the alias relation between two addresses. @@ -694,13 +707,13 @@ ir_alias_relation get_alias_relation( ir_alias_relation rel = _get_alias_relation(adr1, mode1, adr2, mode2); DB((dbg, LEVEL_1, "alias(%+F, %+F) = %s\n", adr1, adr2, get_ir_alias_relation_name(rel))); return rel; -} /* get_alias_relation */ +} /* Set a source language specific memory disambiguator function. */ void set_language_memory_disambiguator(DISAMBIGUATOR_FUNC func) { language_disambuigator = func; -} /* set_language_memory_disambiguator */ +} /** The result cache for the memory disambiguator. */ static set *result_cache = NULL; @@ -727,7 +740,7 @@ static int cmp_mem_disambig_entry(const void *elt, const void *key, size_t size) return p1->adr1 == p2->adr1 && p1->adr2 == p2->adr2 && p1->mode1 == p2->mode1 && p1->mode2 == p2->mode2; -} /* cmp_mem_disambig_entry */ +} /** * Initialize the relation cache. @@ -735,7 +748,7 @@ static int cmp_mem_disambig_entry(const void *elt, const void *key, size_t size) void mem_disambig_init(void) { result_cache = new_set(cmp_mem_disambig_entry, 8); -} /* mem_disambig_init */ +} /* * Determine the alias relation between two addresses. @@ -769,7 +782,7 @@ ir_alias_relation get_alias_relation_ex( set_insert(result_cache, &key, sizeof(key), HASH_ENTRY(adr1, adr2)); return key.result; -} /* get_alias_relation_ex */ +} /* Free the relation cache. */ void mem_disambig_term(void) @@ -778,7 +791,7 @@ void mem_disambig_term(void) del_set(result_cache); result_cache = NULL; } -} /* mem_disambig_term */ +} /** * Check the mode of a Load/Store with the mode of the entity @@ -807,13 +820,12 @@ static int is_hidden_cast(const ir_mode *mode, const ir_mode *ent_mode) if (ent_mode != mode) { if (ent_mode == NULL || get_mode_size_bits(ent_mode) != get_mode_size_bits(mode) || - get_mode_sort(ent_mode) != get_mode_sort(mode) || get_mode_arithmetic(ent_mode) != irma_twos_complement || get_mode_arithmetic(mode) != irma_twos_complement) return true; } return false; -} /* is_hidden_cast */ +} /** * Determine the usage state of a node (or its successor Sels). @@ -883,14 +895,14 @@ static ir_entity_usage determine_entity_usage(const ir_node *irn, ir_entity *ent res |= determine_entity_usage(succ, entity); break; case iro_Sel: { - ir_entity *entity = get_Sel_entity(succ); + ir_entity *sel_entity = get_Sel_entity(succ); /* this analysis can't handle unions correctly */ - if (is_Union_type(get_entity_owner(entity))) { + if (is_Union_type(get_entity_owner(sel_entity))) { res |= ir_usage_unknown; break; } /* Check the successor of irn. */ - res |= determine_entity_usage(succ, entity); + res |= determine_entity_usage(succ, sel_entity); break; } @@ -952,10 +964,11 @@ static void analyse_irg_entity_usage(ir_graph *irg) { ir_type *ft = get_irg_frame_type(irg); ir_node *irg_frame; - int i, j, k, static_link_arg; + size_t i, n; + int j, k, static_link_arg; /* set initial state to not_taken, as this is the "smallest" state */ - for (i = get_class_n_members(ft) - 1; i >= 0; --i) { + for (i = 0, n = get_class_n_members(ft); i < n; ++i) { ir_entity *ent = get_class_member(ft, i); /* methods can only be analyzed globally */ @@ -971,8 +984,8 @@ static void analyse_irg_entity_usage(ir_graph *irg) irg_frame = get_irg_frame(irg); - for (i = get_irn_n_outs(irg_frame) - 1; i >= 0; --i) { - ir_node *succ = get_irn_out(irg_frame, i); + for (j = get_irn_n_outs(irg_frame) - 1; j >= 0; --j) { + ir_node *succ = get_irn_out(irg_frame, j); ir_entity *entity; unsigned flags; @@ -987,7 +1000,7 @@ static void analyse_irg_entity_usage(ir_graph *irg) /* check inner functions accessing outer frame */ static_link_arg = 0; - for (i = get_class_n_members(ft) - 1; i >= 0; --i) { + for (i = 0, n = get_class_n_members(ft); i < n; ++i) { ir_entity *ent = get_class_member(ft, i); ir_graph *inner_irg; ir_node *args; @@ -1027,22 +1040,12 @@ static void analyse_irg_entity_usage(ir_graph *irg) /* now computed */ - irg->entity_usage_state = ir_entity_usage_computed; -} - -ir_entity_usage_computed_state get_irg_entity_usage_state(const ir_graph *irg) -{ - return irg->entity_usage_state; -} - -void set_irg_entity_usage_state(ir_graph *irg, ir_entity_usage_computed_state state) -{ - irg->entity_usage_state = state; + set_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_ENTITY_USAGE); } void assure_irg_entity_usage_computed(ir_graph *irg) { - if (irg->entity_usage_state != ir_entity_usage_not_computed) + if (is_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_ENTITY_USAGE)) return; analyse_irg_entity_usage(irg); @@ -1054,10 +1057,10 @@ void assure_irg_entity_usage_computed(ir_graph *irg) */ static void init_entity_usage(ir_type *tp) { - int i; + size_t i, n; /* We have to be conservative: All external visible entities are unknown */ - for (i = get_compound_n_members(tp) - 1; i >= 0; --i) { + for (i = 0, n = get_compound_n_members(tp); i < n; ++i) { ir_entity *ent = get_compound_member(tp, i); unsigned flags = ir_usage_none; @@ -1075,15 +1078,15 @@ static void init_entity_usage(ir_type *tp) */ static void check_initializer_nodes(ir_initializer_t *initializer) { - unsigned i; - ir_node *n; + size_t i; + ir_node *n; switch (initializer->kind) { case IR_INITIALIZER_CONST: /* let's check if it's an address */ n = initializer->consti.value; - if (is_Global(n)) { - ir_entity *ent = get_Global_entity(n); + if (is_SymConst_addr_ent(n)) { + ir_entity *ent = get_SymConst_entity(n); set_entity_usage(ent, ir_usage_unknown); } return; @@ -1099,7 +1102,7 @@ static void check_initializer_nodes(ir_initializer_t *initializer) return; } panic("invalid initializer found"); -} /* check_initializer_nodes */ +} /** * Mark all entities used in the initializer for the given entity as unknown @@ -1109,9 +1112,6 @@ static void check_initializer_nodes(ir_initializer_t *initializer) */ static void check_initializer(ir_entity *ent) { - ir_node *n; - int i; - /* Beware: Methods are always initialized with "themself". This does not * count as a taken address. * TODO: this initialisation with "themself" is wrong and should be removed @@ -1122,13 +1122,15 @@ static void check_initializer(ir_entity *ent) if (ent->initializer != NULL) { check_initializer_nodes(ent->initializer); } else if (entity_has_compound_ent_values(ent)) { - for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i) { - n = get_compound_ent_value(ent, i); + size_t i, n; + + for (i = 0, n = get_compound_ent_n_values(ent); i < n; ++i) { + ir_node *irn = get_compound_ent_value(ent, i); /* let's check if it's an address */ - if (is_Global(n)) { - ir_entity *ent = get_Global_entity(n); - set_entity_usage(ent, ir_usage_unknown); + if (is_SymConst_addr_ent(irn)) { + ir_entity *symconst_ent = get_SymConst_entity(irn); + set_entity_usage(symconst_ent, ir_usage_unknown); } } } @@ -1142,14 +1144,14 @@ static void check_initializer(ir_entity *ent) */ static void check_initializers(ir_type *tp) { - int i; + size_t i, n; - for (i = get_compound_n_members(tp) - 1; i >= 0; --i) { + for (i = 0, n = get_compound_n_members(tp); i < n; ++i) { ir_entity *ent = get_compound_member(tp, i); check_initializer(ent); } -} /* check_initializers */ +} #ifdef DEBUG_libfirm /** @@ -1157,10 +1159,10 @@ static void check_initializers(ir_type *tp) * * @param tp a compound type */ -static void print_entity_usage_flags(ir_type *tp) +static void print_entity_usage_flags(const ir_type *tp) { - int i; - for (i = get_compound_n_members(tp) - 1; i >= 0; --i) { + size_t i, n; + for (i = 0, n = get_compound_n_members(tp); i < n; ++i) { ir_entity *ent = get_compound_member(tp, i); ir_entity_usage flags = get_entity_usage(ent); @@ -1183,32 +1185,29 @@ static void print_entity_usage_flags(ir_type *tp) /** * Post-walker: check for global entity address */ -static void check_global_address(ir_node *irn, void *env) +static void check_global_address(ir_node *irn, void *data) { - ir_node *tls = (ir_node*) env; ir_entity *ent; unsigned flags; + (void) data; - if (is_Global(irn)) { + if (is_SymConst_addr_ent(irn)) { /* A global. */ - ent = get_Global_entity(irn); - } else if (is_Sel(irn) && get_Sel_ptr(irn) == tls) { - /* A TLS variable. */ - ent = get_Sel_entity(irn); + ent = get_SymConst_entity(irn); } else return; flags = get_entity_usage(ent); flags |= determine_entity_usage(irn, ent); set_entity_usage(ent, (ir_entity_usage) flags); -} /* check_global_address */ +} /** * Update the entity usage flags of all global entities. */ static void analyse_irp_globals_entity_usage(void) { - int i; + size_t i, n; ir_segment_t s; for (s = IR_SEGMENT_FIRST; s <= IR_SEGMENT_LAST; ++s) { @@ -1221,11 +1220,11 @@ static void analyse_irp_globals_entity_usage(void) check_initializers(type); } - for (i = get_irp_n_irgs() - 1; i >= 0; --i) { + for (i = 0, n = get_irp_n_irgs(); i < n; ++i) { ir_graph *irg = get_irp_irg(i); assure_irg_outs(irg); - irg_walk_graph(irg, NULL, check_global_address, get_irg_tls(irg)); + irg_walk_graph(irg, NULL, check_global_address, NULL); } #ifdef DEBUG_libfirm @@ -1288,7 +1287,7 @@ static ir_type *clone_type_and_cache(ir_type *tp) pmap_insert(mtp_map, tp, res); return res; -} /* clone_type_and_cache */ +} /** * Walker: clone all call types of Calls to methods having the @@ -1314,12 +1313,12 @@ static void update_calls_to_private(ir_node *call, void *env) } } } -} /* update_calls_to_private */ +} /* Mark all private methods, i.e. those of which all call sites are known. */ void mark_private_methods(void) { - int i; + size_t i, n; int changed = 0; assure_irp_globals_entity_usage_computed(); @@ -1327,13 +1326,12 @@ void mark_private_methods(void) mtp_map = pmap_create(); /* first step: change the calling conventions of the local non-escaped entities */ - for (i = get_irp_n_irgs() - 1; i >= 0; --i) { + for (i = 0, n = get_irp_n_irgs(); i < n; ++i) { ir_graph *irg = get_irp_irg(i); ir_entity *ent = get_irg_entity(irg); ir_entity_usage flags = get_entity_usage(ent); - if (!entity_is_externally_visible(ent) && - !(flags & ir_usage_address_taken)) { + if (!(flags & ir_usage_address_taken) && !entity_is_externally_visible(ent)) { ir_type *mtp = get_entity_type(ent); add_entity_additional_properties(ent, mtp_property_private); @@ -1353,10 +1351,10 @@ void mark_private_methods(void) all_irg_walk(NULL, update_calls_to_private, NULL); pmap_destroy(mtp_map); -} /* mark_private_methods */ +} /* create a pass for mark_private_methods() */ ir_prog_pass_t *mark_private_methods_pass(const char *name) { return def_prog_pass(name ? name : "mark_private_methods", mark_private_methods); -} /* mark_private_methods_pass */ +}