X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firmemory.c;h=ff946b3d0462b05ade9e6c8588d2cd5de650b71c;hb=b9a1bfdbce56c76bd4d5ff772963628523ecfc41;hp=6191234c7f00f55a1dfd5bae88a311901ff29aaa;hpb=9d4e23060441530a20af5d331268435bfe18f305;p=libfirm diff --git a/ir/ana/irmemory.c b/ir/ana/irmemory.c index 6191234c7..ff946b3d0 100644 --- a/ir/ana/irmemory.c +++ b/ir/ana/irmemory.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved. + * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved. * * This file is part of libFirm. * @@ -22,7 +22,6 @@ * @brief Memory disambiguator * @author Michael Beck * @date 27.12.2006 - * @version $Id$ */ #include "config.h" @@ -56,7 +55,6 @@ static DISAMBIGUATOR_FUNC language_disambuigator = NULL; /** The global memory disambiguator options. */ static unsigned global_mem_disamgig_opt = aa_opt_no_opt; -/* Returns a human readable name for an alias relation. */ const char *get_ir_alias_relation_name(ir_alias_relation rel) { #define X(a) case a: return #a @@ -70,32 +68,28 @@ const char *get_ir_alias_relation_name(ir_alias_relation rel) #undef X } -/* Get the memory disambiguator options for a graph. */ unsigned get_irg_memory_disambiguator_options(const ir_graph *irg) { unsigned opt = irg->mem_disambig_opt; 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; -} /* get_base_sc */ +} /** * Find the base address and entity of an Sel node. @@ -115,7 +109,7 @@ 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. @@ -133,8 +127,8 @@ 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. @@ -201,7 +195,7 @@ 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; } @@ -215,11 +209,11 @@ 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; @@ -227,7 +221,7 @@ 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 */ @@ -298,10 +292,10 @@ 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 + * Two Sel addresses have the same base address, check if their offsets are * different. * * @param adr1 The first address. @@ -309,7 +303,7 @@ static ir_alias_relation different_index(const ir_node *idx1, const ir_node *idx */ static ir_alias_relation different_sel_offsets(const ir_node *sel1, const ir_node *sel2) { - /* seems to be broken */ + /* TODO: fix */ (void) sel1; (void) sel2; #if 0 @@ -354,7 +348,7 @@ 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 @@ -367,13 +361,13 @@ 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); @@ -404,7 +398,7 @@ 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. @@ -420,34 +414,31 @@ 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)) { @@ -567,7 +558,7 @@ 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. */ @@ -600,6 +591,16 @@ 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) { @@ -688,11 +689,8 @@ leave_type_based_alias:; /* access points-to information here */ return ir_may_alias; -} /* _get_alias_relation */ +} -/* - * Determine the alias relation between two addresses. - */ ir_alias_relation get_alias_relation( const ir_node *adr1, const ir_mode *mode1, const ir_node *adr2, const ir_mode *mode2) @@ -700,13 +698,12 @@ 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; @@ -720,7 +717,7 @@ typedef struct mem_disambig_entry { ir_alias_relation result; /**< The alias relation result. */ } mem_disambig_entry; -#define HASH_ENTRY(adr1, adr2) (HASH_PTR(adr1) ^ HASH_PTR(adr2)) +#define HASH_ENTRY(adr1, adr2) (hash_ptr(adr1) ^ hash_ptr(adr2)) /** * Compare two relation cache entries. @@ -733,19 +730,13 @@ 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. - */ void mem_disambig_init(void) { result_cache = new_set(cmp_mem_disambig_entry, 8); -} /* mem_disambig_init */ +} -/* - * Determine the alias relation between two addresses. - */ ir_alias_relation get_alias_relation_ex( const ir_node *adr1, const ir_mode *mode1, const ir_node *adr2, const ir_mode *mode2) @@ -767,24 +758,23 @@ ir_alias_relation get_alias_relation_ex( key.adr2 = adr2; key.mode1 = mode1; key.mode2 = mode2; - entry = (mem_disambig_entry*) set_find(result_cache, &key, sizeof(key), HASH_ENTRY(adr1, adr2)); + entry = set_find(mem_disambig_entry, result_cache, &key, sizeof(key), HASH_ENTRY(adr1, adr2)); if (entry != NULL) return entry->result; key.result = get_alias_relation(adr1, mode1, adr2, mode2); - set_insert(result_cache, &key, sizeof(key), HASH_ENTRY(adr1, adr2)); + (void)set_insert(mem_disambig_entry, 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) { if (result_cache != NULL) { del_set(result_cache); result_cache = NULL; } -} /* mem_disambig_term */ +} /** * Check the mode of a Load/Store with the mode of the entity @@ -813,13 +803,12 @@ 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). @@ -889,14 +878,14 @@ 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; } @@ -958,10 +947,13 @@ 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; + + assure_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_OUTS); /* 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 */ @@ -973,12 +965,10 @@ static void analyse_irg_entity_usage(ir_graph *irg) } } - assure_irg_outs(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; @@ -993,7 +983,7 @@ 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; @@ -1031,24 +1021,13 @@ 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; + add_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE); } void assure_irg_entity_usage_computed(ir_graph *irg) { - if (irg->entity_usage_state != ir_entity_usage_not_computed) + if (irg_has_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE)) return; analyse_irg_entity_usage(irg); @@ -1060,10 +1039,10 @@ 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; @@ -1081,15 +1060,15 @@ 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; @@ -1105,7 +1084,7 @@ 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 @@ -1124,18 +1103,6 @@ static void check_initializer(ir_entity *ent) if (ent->initializer != NULL) { check_initializer_nodes(ent->initializer); - } else if (entity_has_compound_ent_values(ent)) { - 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(irn)) { - ir_entity *ent = get_Global_entity(irn); - set_entity_usage(ent, ir_usage_unknown); - } - } } } @@ -1147,14 +1114,14 @@ 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 /** @@ -1162,10 +1129,10 @@ 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); @@ -1188,25 +1155,22 @@ 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. @@ -1230,7 +1194,7 @@ static void analyse_irp_globals_entity_usage(void) 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 @@ -1245,19 +1209,16 @@ static void analyse_irp_globals_entity_usage(void) irp->globals_entity_usage_state = ir_entity_usage_computed; } -/* Returns the current address taken state of the globals. */ ir_entity_usage_computed_state get_irp_globals_entity_usage_state(void) { return irp->globals_entity_usage_state; } -/* Sets the current address taken state of the graph. */ void set_irp_globals_entity_usage_state(ir_entity_usage_computed_state state) { irp->globals_entity_usage_state = state; } -/* Assure that the address taken flag is computed for the globals. */ void assure_irp_globals_entity_usage_computed(void) { if (irp->globals_entity_usage_state != ir_entity_usage_not_computed) @@ -1283,17 +1244,15 @@ static pmap *mtp_map; */ static ir_type *clone_type_and_cache(ir_type *tp) { - ir_type *res; - pmap_entry *e = pmap_find(mtp_map, tp); - - if (e != NULL) - return (ir_type*) e->value; + ir_type *res = pmap_get(ir_type, mtp_map, tp); - res = clone_type_method(tp); - pmap_insert(mtp_map, tp, res); + if (res == NULL) { + res = clone_type_method(tp); + pmap_insert(mtp_map, tp, res); + } return res; -} /* clone_type_and_cache */ +} /** * Walker: clone all call types of Calls to methods having the @@ -1319,9 +1278,8 @@ 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) { size_t i, n; @@ -1357,10 +1315,9 @@ 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 */ +}