X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fana%2Firmemory.c;h=2df5b07166b68bd5ffcbedab8eae5cee084121dd;hb=0ada12ba1e11d8ff2e39e3183eb43c4783df2d91;hp=c5931b7c40017e54ef1f46c0a4f7b2f4a6b88eb4;hpb=55ca37efd06c4de5888854c011db75442abfed35;p=libfirm diff --git a/ir/ana/irmemory.c b/ir/ana/irmemory.c index c5931b7c4..2df5b0716 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. * @@ -22,17 +22,17 @@ * @brief Memory disambiguator * @author Michael Beck * @date 27.12.2006 - * @version $Id$ */ -#ifdef HAVE_CONFIG_H #include "config.h" -#endif #include +#include +#include "adt/pmap.h" #include "irnode_t.h" #include "irgraph_t.h" #include "irprog_t.h" +#include "irmemory_t.h" #include "irmemory.h" #include "irflag.h" #include "hashptr.h" @@ -42,9 +42,12 @@ #include "irprintf.h" #include "debug.h" #include "error.h" +#include "typerep.h" +#include "irpass.h" /** The debug handle. */ DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;) +DEBUG_ONLY(static firm_dbg_module_t *dbgcall = NULL;) /** The source language specific language disambiguator function. */ static DISAMBIGUATOR_FUNC language_disambuigator = NULL; @@ -52,35 +55,41 @@ 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) { +const char *get_ir_alias_relation_name(ir_alias_relation rel) +{ #define X(a) case a: return #a switch (rel) { - X(no_alias); - X(may_alias); - X(sure_alias); - default: assert(0); return "UNKNOWN"; + X(ir_no_alias); + X(ir_may_alias); + X(ir_sure_alias); + default: + panic("UNKNOWN alias relation"); } #undef X } -/* Get the memory disambiguator options for a graph. */ -unsigned get_irg_memory_disambiguator_options(ir_graph *irg) { +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) { +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) { +void set_irp_memory_disambiguator_options(unsigned options) +{ global_mem_disamgig_opt = options; -} /* set_irp_memory_disambiguator_options */ +} + +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. @@ -90,7 +99,8 @@ void set_irp_memory_disambiguator_options(unsigned options) { * * @return the base address. */ -static ir_node *find_base_adr(ir_node *sel, ir_entity **pEnt) { +static ir_node *find_base_adr(const ir_node *sel, ir_entity **pEnt) +{ ir_node *ptr = get_Sel_ptr(sel); while (is_Sel(ptr)) { @@ -99,42 +109,51 @@ static ir_node *find_base_adr(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. * - * @return no_alias if the Const is greater, may_alias else + * @param cns a Const node + * @param size a integer size + * + * @return ir_no_alias if the Const is greater, ir_may_alias else */ -static ir_alias_relation check_const(ir_node *cns, int size) { - tarval *tv = get_Const_tarval(cns); - tarval *tv_size; +static ir_alias_relation check_const(const ir_node *cns, int size) +{ + ir_tarval *tv = get_Const_tarval(cns); + ir_tarval *tv_size; if (size == 0) - return tarval_is_null(tv) ? may_alias : no_alias; + 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) ? no_alias : 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. * - * @return sure_alias iff idx1 == idx2 - * no_alias iff they ALWAYS differ more than size - * may_alias else + * @param idx1 a node representing the first index + * @param idx2 a node representing the second index + * @param size an integer size + * + * @return ir_sure_alias iff idx1 == idx2 + * ir_no_alias iff they ALWAYS differ more than size + * ir_may_alias else */ -static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) { +static ir_alias_relation different_index(const ir_node *idx1, const ir_node *idx2, int size) +{ if (idx1 == idx2) - return sure_alias; + return ir_sure_alias; if (is_Const(idx1) && is_Const(idx2)) { /* both are const, we can compare them */ - tarval *tv1 = get_Const_tarval(idx1); - tarval *tv2 = get_Const_tarval(idx2); - tarval *tv, *tv_size; + ir_tarval *tv1 = get_Const_tarval(idx1); + ir_tarval *tv2 = get_Const_tarval(idx2); + ir_tarval *tv, *tv_size; ir_mode *m1, *m2; if (size == 0) - return tv1 == tv2 ? sure_alias : no_alias; + return tv1 == tv2 ? ir_sure_alias : ir_no_alias; /* arg, modes may be different */ m1 = get_tarval_mode(tv1); @@ -147,7 +166,7 @@ static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) m1 = mode_is_signed(m1) ? find_signed_mode(m2) : find_unsigned_mode(m2); if (m1 == NULL) { /* should NOT happen, but if it does we give up here */ - return may_alias; + return ir_may_alias; } tv1 = tarval_convert_to(tv1, m1); } else if (size > 0) { @@ -155,7 +174,7 @@ static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) m2 = mode_is_signed(m2) ? find_signed_mode(m1) : find_unsigned_mode(m1); if (m2 == NULL) { /* should NOT happen, but if it does we give up here */ - return may_alias; + return ir_may_alias; } tv2 = tarval_convert_to(tv2, m2); } @@ -163,25 +182,25 @@ static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) if (get_mode_sign(m1) != get_mode_sign(m2)) { /* find the signed */ if (mode_is_signed(m2)) { - tarval *t = tv1; + ir_tarval *t = tv1; ir_mode *tm = m1; tv1 = tv2; m1 = m2; tv2 = t; m2 = tm; } /* m1 is now the signed one */ - if (tarval_cmp(tv1, get_tarval_null(m1)) & (pn_Cmp_Eq|pn_Cmp_Gt)) { + if (!tarval_is_negative(tv1)) { /* tv1 is signed, but >= 0, simply cast into unsigned */ tv1 = tarval_convert_to(tv1, m2); } 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 no_alias; + return ir_no_alias; } /* tv_size > tv2, so we can subtract without overflow */ - tv2 = tarval_sub(tv_size, tv2); + tv2 = tarval_sub(tv_size, tv2, NULL); /* tv1 is < 0, so we can negate it */ tv1 = tarval_neg(tv1); @@ -190,19 +209,19 @@ static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) tv1 = tarval_convert_to(tv1, m2); /* now we can compare without overflow */ - return tarval_cmp(tv1, tv2) & (pn_Cmp_Eq|pn_Cmp_Gt) ? no_alias : 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) { - tarval *t = tv1; + if (tarval_cmp(tv1, tv2) == ir_relation_greater) { + ir_tarval *t = tv1; tv1 = tv2; tv2 = t; } /* tv1 is now the "smaller" one */ - tv = tarval_sub(tv2, tv1); + 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) ? no_alias : 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 */ @@ -272,17 +291,18 @@ static ir_alias_relation different_index(ir_node *idx1, ir_node *idx2, int size) } } - return may_alias; -} /* different_index */ + return ir_may_alias; +} /** - * 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. * @param adr2 The second address. */ -static ir_alias_relation different_sel_offsets(ir_node *sel1, ir_node *sel2) { +static ir_alias_relation different_sel_offsets(const ir_node *sel1, const ir_node *sel2) +{ /* seems to be broken */ (void) sel1; (void) sel2; @@ -324,9 +344,11 @@ static ir_alias_relation different_sel_offsets(ir_node *sel1, ir_node *sel2) { return have_no > 0 ? no_alias : sure_alias; } } +#else + (void) different_index; #endif - return may_alias; -} /* different_sel_offsets */ + return ir_may_alias; +} /** * Determine the alias relation by checking if adr1 and adr2 are pointer @@ -335,7 +357,7 @@ static ir_alias_relation different_sel_offsets(ir_node *sel1, ir_node *sel2) { * @param adr1 The first address. * @param adr2 The second address. */ -static ir_alias_relation different_types(ir_node *adr1, ir_node *adr2) +static ir_alias_relation different_types(const ir_node *adr1, const ir_node *adr2) { ir_entity *ent1 = NULL, *ent2 = NULL; @@ -354,52 +376,37 @@ static ir_alias_relation different_types(ir_node *adr1, ir_node *adr2) ir_type *tp2 = get_entity_type(ent2); if (tp1 != tp2) { - if (is_Pointer_type(tp1) && is_Pointer_type(tp2)) { - /* do deref until no pointer types are found */ - do { - tp1 = get_pointer_points_to_type(tp1); - tp2 = get_pointer_points_to_type(tp2); - } while (is_Pointer_type(tp1) && is_Pointer_type(tp2)); + /* do deref until no pointer types are found */ + while (is_Pointer_type(tp1) && is_Pointer_type(tp2)) { + tp1 = get_pointer_points_to_type(tp1); + tp2 = get_pointer_points_to_type(tp2); } if (get_type_tpop(tp1) != get_type_tpop(tp2)) { /* different type structure */ - return no_alias; + return ir_no_alias; } if (is_Class_type(tp1)) { /* check class hierarchy */ if (! is_SubClass_of(tp1, tp2) && ! is_SubClass_of(tp2, tp1)) - return no_alias; + return ir_no_alias; } else { /* different types */ - return no_alias; + return ir_no_alias; } } } - return may_alias; -} /* different_types */ - -/** - * Returns non-zero if a node is a routine parameter. - * - * @param node the Proj node to test - */ -static int is_arg_Proj(ir_node *node) { - if (! is_Proj(node)) - return 0; - node = get_Proj_pred(node); - if (! is_Proj(node)) - return 0; - return pn_Start_T_args == get_Proj_proj(node) && is_Start(get_Proj_pred(node)); -} /* is_arg_Proj */ + return ir_may_alias; +} /** * Returns non-zero if a node is a result on a malloc-like routine. * * @param node the Proj node to test */ -static int is_malloc_Result(ir_node *node) { +static int is_malloc_Result(const ir_node *node) +{ node = get_Proj_pred(node); if (! is_Proj(node)) return 0; @@ -415,97 +422,89 @@ static int is_malloc_Result(ir_node *node) { return 0; } return 0; -} /* is_malloc_Result */ - -/** - * Returns true if an address represents a global variable. - * - * @param irn the node representing the address - */ -static INLINE int is_global_var(ir_node *irn) { - return is_SymConst_addr_ent(irn); -} /* is_global_var */ - -/** - * classify storage locations. - * Except STORAGE_CLASS_POINTER they are all disjoint. - * STORAGE_CLASS_POINTER potentially aliases all classes which don't have a - * NOTTAKEN modifier. - */ -typedef enum { - STORAGE_CLASS_POINTER = 0x0000, - STORAGE_CLASS_GLOBALVAR = 0x0001, - STORAGE_CLASS_LOCALVAR = 0x0002, - STORAGE_CLASS_ARGUMENT = 0x0003, - STORAGE_CLASS_TLS = 0x0004, - STORAGE_CLASS_MALLOCED = 0x0005, - - STORAGE_CLASS_MODIFIER_NOTTAKEN = 0x1000, -} storage_class_class_t; +} -/** - * Classify a base pointer. - * - * @param irg the graph of the pointer - * @param irn the node representing the base address - * @param ent the base entity of the base address iff any - */ -static storage_class_class_t classify_pointer(ir_graph *irg, ir_node *irn, ir_entity *ent) +ir_storage_class_class_t classify_pointer(const ir_node *irn, + const ir_entity *ent) { - storage_class_class_t res = STORAGE_CLASS_POINTER; + ir_graph *irg = get_irn_irg(irn); + ir_storage_class_class_t res = ir_sc_pointer; if (is_SymConst_addr_ent(irn)) { ir_entity *entity = get_SymConst_entity(irn); - res = STORAGE_CLASS_GLOBALVAR; - if (get_entity_address_taken(entity) == ir_address_not_taken) - res |= STORAGE_CLASS_MODIFIER_NOTTAKEN; + 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 = STORAGE_CLASS_LOCALVAR; - if (ent != NULL && get_entity_address_taken(ent) == ir_address_not_taken) - res |= STORAGE_CLASS_MODIFIER_NOTTAKEN; - } else if (is_arg_Proj(irn)) { - return STORAGE_CLASS_ARGUMENT; - } else if (irn == get_irg_tls(irg)) { - res = STORAGE_CLASS_TLS; - if (ent != NULL && get_entity_address_taken(ent) == ir_address_not_taken) - res |= STORAGE_CLASS_MODIFIER_NOTTAKEN; + res = ir_sc_localvar; + 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 STORAGE_CLASS_MALLOCED; + return ir_sc_malloced; + } else if (is_Const(irn)) { + return ir_sc_globaladdr; + } else if (is_arg_Proj(irn)) { + res |= ir_sc_modifier_argument; } return res; } +/** + * If adr represents a Bitfield Sel, skip it + */ +static const ir_node *skip_Bitfield_Sels(const ir_node *adr) +{ + if (is_Sel(adr)) { + ir_entity *ent = get_Sel_entity(adr); + ir_type *bf_type = get_entity_type(ent); + + /* is it a bitfield type? */ + if (is_Primitive_type(bf_type) && get_primitive_base_type(bf_type) != NULL) + adr = get_Sel_ptr(adr); + } + return adr; +} + /** * Determine the alias relation between two addresses. + * + * @param addr1 pointer address of the first memory operation + * @param mode1 the mode of the accessed data through addr1 + * @param addr2 pointer address of the second memory operation + * @param mode2 the mode of the accessed data through addr2 + * + * @return found memory relation */ static ir_alias_relation _get_alias_relation( - ir_graph *irg, - ir_node *adr1, ir_mode *mode1, - ir_node *adr2, ir_mode *mode2) + const ir_node *adr1, const ir_mode *mode1, + const ir_node *adr2, const ir_mode *mode2) { ir_entity *ent1, *ent2; unsigned options; long offset1 = 0; long offset2 = 0; - ir_node *base1; - ir_node *base2; - ir_node *orig_adr1 = adr1; - ir_node *orig_adr2 = adr2; + const ir_node *base1; + const ir_node *base2; + const ir_node *orig_adr1 = adr1; + const ir_node *orig_adr2 = adr2; + ir_graph *irg; unsigned mode_size; - storage_class_class_t class1, class2; + ir_storage_class_class_t class1, class2, mod1, mod2; int have_const_offsets; if (! get_opt_alias_analysis()) - return may_alias; + return ir_may_alias; if (adr1 == adr2) - return sure_alias; + return ir_sure_alias; + irg = get_irn_irg(adr1); options = get_irg_memory_disambiguator_options(irg); /* The Armageddon switch */ if (options & aa_opt_no_alias) - return no_alias; + return ir_no_alias; /* do the addresses have constants offsets? * Note: nodes are normalized to have constants at right inputs, @@ -514,8 +513,8 @@ static ir_alias_relation _get_alias_relation( have_const_offsets = 1; while (is_Add(adr1)) { ir_node *add_right = get_Add_right(adr1); - if (is_Const(add_right)) { - tarval *tv = get_Const_tarval(add_right); + if (is_Const(add_right) && !mode_is_reference(get_irn_mode(add_right))) { + ir_tarval *tv = get_Const_tarval(add_right); offset1 += get_tarval_long(tv); adr1 = get_Add_left(adr1); } else if (mode_is_reference(get_irn_mode(add_right))) { @@ -528,8 +527,8 @@ static ir_alias_relation _get_alias_relation( } while (is_Add(adr2)) { ir_node *add_right = get_Add_right(adr2); - if (is_Const(add_right)) { - tarval *tv = get_Const_tarval(add_right); + if (is_Const(add_right) && !mode_is_reference(get_irn_mode(add_right))) { + ir_tarval *tv = get_Const_tarval(add_right); offset2 += get_tarval_long(tv); adr2 = get_Add_left(adr2); } else if (mode_is_reference(get_irn_mode(add_right))) { @@ -551,12 +550,22 @@ static ir_alias_relation _get_alias_relation( */ if (adr1 == adr2 && have_const_offsets) { if ((unsigned long)labs(offset2 - offset1) >= mode_size) - return no_alias; + return ir_no_alias; else - return sure_alias; + return ir_sure_alias; } - /* skip sels */ + /* + * 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 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. + */ + adr1 = skip_Bitfield_Sels(adr1); + adr2 = skip_Bitfield_Sels(adr2); + + /* skip Sels */ base1 = adr1; base2 = adr2; ent1 = NULL; @@ -568,170 +577,204 @@ static ir_alias_relation _get_alias_relation( base2 = find_base_adr(adr2, &ent2); } - /* same base address -> compare sel entities */ + /* same base address -> compare Sel entities */ if (base1 == base2 && ent1 != NULL && ent2 != NULL) { if (ent1 != ent2) - return no_alias; + return ir_no_alias; else if (have_const_offsets) return different_sel_offsets(adr1, adr2); } - class1 = classify_pointer(irg, base1, ent1); - class2 = classify_pointer(irg, base2, ent2); + mod1 = classify_pointer(base1, ent1); + mod2 = classify_pointer(base2, ent2); - if (class1 == STORAGE_CLASS_POINTER) { - if (class2 & STORAGE_CLASS_MODIFIER_NOTTAKEN) { - return no_alias; - } else { - return may_alias; - } - } else if (class2 == STORAGE_CLASS_POINTER) { - if (class1 & STORAGE_CLASS_MODIFIER_NOTTAKEN) { - return no_alias; - } else { - return may_alias; - } - } + class1 = get_base_sc(mod1); + class2 = get_base_sc(mod2); - if (class1 != class2) { - return no_alias; + /* 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 == STORAGE_CLASS_GLOBALVAR) { - ir_entity *entity1 = get_SymConst_entity(base1); - ir_entity *entity2 = get_SymConst_entity(base2); - if (entity1 != entity2) - return no_alias; - - /* for some reason CSE didn't happen yet for the 2 SymConsts... */ - return may_alias; + if (class1 == ir_sc_pointer || class2 == ir_sc_pointer) { + /* swap pointer class to class1 */ + if (class2 == ir_sc_pointer) { + ir_storage_class_class_t temp = mod1; + mod1 = mod2; + mod2 = temp; + class1 = get_base_sc(mod1); + class2 = get_base_sc(mod2); + } + /* a pointer and an object whose address was never taken */ + if (mod2 & ir_sc_modifier_nottaken) { + return ir_no_alias; + } + if (mod1 & ir_sc_modifier_argument) { + if ( (options & aa_opt_no_alias_args) + && (mod2 & ir_sc_modifier_argument)) + return ir_no_alias; + if ( (options & aa_opt_no_alias_args_global) + && (class2 == ir_sc_globalvar + || class2 == ir_sc_tls + || class2 == ir_sc_globaladdr)) + return ir_no_alias; + } + } else if (class1 != class2) { + /* two objects from different memory spaces */ + return ir_no_alias; + } else { + /* both classes are equal */ + if (class1 == ir_sc_globalvar) { + ir_entity *entity1 = get_SymConst_entity(base1); + ir_entity *entity2 = get_SymConst_entity(base2); + if (entity1 != entity2) + return ir_no_alias; + + /* for some reason CSE didn't happen yet for the 2 SymConsts... */ + return ir_may_alias; + } else if (class1 == ir_sc_globaladdr) { + ir_tarval *tv = get_Const_tarval(base1); + offset1 += get_tarval_long(tv); + tv = get_Const_tarval(base2); + offset2 += get_tarval_long(tv); + + if ((unsigned long)labs(offset2 - offset1) >= mode_size) + return ir_no_alias; + else + return ir_sure_alias; + } } - /* Type based alias analysis */ + /* Type based alias analysis */ if (options & aa_opt_type_based) { ir_alias_relation rel; if (options & aa_opt_byte_type_may_alias) { if (get_mode_size_bits(mode1) == 8 || get_mode_size_bits(mode2) == 8) { - /* One of the modes address a byte. Assume a may_alias and leave + /* One of the modes address a byte. Assume a ir_may_alias and leave the type based check. */ goto leave_type_based_alias; } } /* cheap check: If the mode sizes did not match, the types MUST be different */ if (get_mode_size_bits(mode1) != get_mode_size_bits(mode2)) - return no_alias; + return ir_no_alias; /* cheap test: if only one is a reference mode, no alias */ if (mode_is_reference(mode1) != mode_is_reference(mode2)) - return no_alias; + return ir_no_alias; + + /* cheap test: if arithmetic is different, no alias */ + if (get_mode_arithmetic(mode1) != get_mode_arithmetic(mode2)) + return ir_no_alias; /* try rule R5 */ rel = different_types(orig_adr1, orig_adr2); - if (rel != may_alias) + if (rel != ir_may_alias) return rel; leave_type_based_alias:; } /* do we have a language specific memory disambiguator? */ - if (language_disambuigator) { - ir_alias_relation rel = (*language_disambuigator)(irg, orig_adr1, mode1, orig_adr2, mode2); - if (rel != may_alias) + if (language_disambuigator != NULL) { + ir_alias_relation rel = language_disambuigator(orig_adr1, mode1, orig_adr2, mode2); + if (rel != ir_may_alias) return rel; } /* access points-to information here */ - return may_alias; -} /* _get_alias_relation */ + return ir_may_alias; +} -/* - * Determine the alias relation between two addresses. - */ ir_alias_relation get_alias_relation( - ir_graph *irg, - ir_node *adr1, ir_mode *mode1, - ir_node *adr2, ir_mode *mode2) + const ir_node *adr1, const ir_mode *mode1, + const ir_node *adr2, const ir_mode *mode2) { - ir_alias_relation rel = _get_alias_relation(irg, adr1, mode1, adr2, mode2); + 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) { +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; /** An entry in the relation cache. */ typedef struct mem_disambig_entry { - ir_node *adr1; /**< The first address. */ - ir_node *adr2; /**< The second address. */ + const ir_node *adr1; /**< The first address. */ + const ir_mode *mode1; /**< The first address mode. */ + const ir_node *adr2; /**< The second address. */ + const ir_mode *mode2; /**< The second address mode. */ 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. */ -static int cmp_mem_disambig_entry(const void *elt, const void *key, size_t size) { - const mem_disambig_entry *p1 = elt; - const mem_disambig_entry *p2 = key; +static int cmp_mem_disambig_entry(const void *elt, const void *key, size_t size) +{ + const mem_disambig_entry *p1 = (const mem_disambig_entry*) elt; + const mem_disambig_entry *p2 = (const mem_disambig_entry*) key; (void) size; - return p1->adr1 == p2->adr1 && p1->adr2 == p2->adr2; -} /* cmp_mem_disambig_entry */ + return p1->adr1 == p2->adr1 && p1->adr2 == p2->adr2 && + p1->mode1 == p2->mode1 && p1->mode2 == p2->mode2; +} -/** - * Initialize the relation cache. - */ -void mem_disambig_init(void) { +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( - ir_graph *irg, - ir_node *adr1, ir_mode *mode1, - ir_node *adr2, ir_mode *mode2) + const ir_node *adr1, const ir_mode *mode1, + const ir_node *adr2, const ir_mode *mode2) { mem_disambig_entry key, *entry; ir_fprintf(stderr, "%+F <-> %+F\n", adr1, adr2); if (! get_opt_alias_analysis()) - return may_alias; + return ir_may_alias; if (get_irn_opcode(adr1) > get_irn_opcode(adr2)) { - ir_node *t = adr1; + const ir_node *t = adr1; adr1 = adr2; adr2 = t; } - key.adr1 = adr1; - key.adr2 = adr2; - entry = set_find(result_cache, &key, sizeof(key), HASH_ENTRY(adr1, adr2)); - if (entry) + key.adr1 = adr1; + key.adr2 = adr2; + key.mode1 = mode1; + key.mode2 = mode2; + 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(irg, adr1, mode1, adr2, mode2); + 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) { +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 @@ -752,374 +795,471 @@ void mem_disambig_term(void) { * * @return non-zero if the Load/Store is a hidden cast, zero else */ -static int is_hidden_cast(ir_mode *mode, ir_mode *ent_mode) { +static int is_hidden_cast(const ir_mode *mode, const ir_mode *ent_mode) +{ + if (ent_mode == NULL) + return false; + 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 1; + return true; } - return 0; -} /* is_hidden_cast */ + return false; +} /** - * Determine the address_taken state of a node (or it's successor Sels). + * Determine the usage state of a node (or its successor Sels). * * @param irn the node */ -static ir_address_taken_state find_address_taken_state(ir_node *irn) { - int i, j; +static ir_entity_usage determine_entity_usage(const ir_node *irn, ir_entity *entity) +{ + int i; ir_mode *emode, *mode; ir_node *value; - ir_entity *ent; ir_type *tp; + unsigned res = 0; for (i = get_irn_n_outs(irn) - 1; i >= 0; --i) { ir_node *succ = get_irn_out(irn, i); switch (get_irn_opcode(succ)) { case iro_Load: + /* beware: irn might be a Id node here, so irn might be not + equal to get_Load_ptr(succ) */ + res |= ir_usage_read; + /* check if this load is not a hidden conversion */ - mode = get_Load_mode(succ); - ent = is_SymConst(irn) ? get_SymConst_entity(irn) : get_Sel_entity(irn); - emode = get_type_mode(get_entity_type(ent)); + mode = get_Load_mode(succ); + emode = get_type_mode(get_entity_type(entity)); if (is_hidden_cast(mode, emode)) - return ir_address_taken; + res |= ir_usage_reinterpret_cast; break; case iro_Store: /* check that the node is not the Store's value */ - value = get_Store_value(succ); - if (value == irn) - return ir_address_taken; - /* check if this Store is not a hidden conversion */ - mode = get_irn_mode(value); - ent = is_SymConst(irn) ? get_SymConst_entity(irn) : get_Sel_entity(irn); - emode = get_type_mode(get_entity_type(ent)); - if (is_hidden_cast(mode, emode)) - return ir_address_taken; + if (irn == get_Store_value(succ)) { + res |= ir_usage_unknown; + } + if (irn == get_Store_ptr(succ)) { + res |= ir_usage_write; + + /* check if this Store is not a hidden conversion */ + value = get_Store_value(succ); + mode = get_irn_mode(value); + emode = get_type_mode(get_entity_type(entity)); + if (is_hidden_cast(mode, emode)) + res |= ir_usage_reinterpret_cast; + } + assert(irn != get_Store_mem(succ)); break; case iro_CopyB: /* CopyB are like Loads/Stores */ - ent = is_SymConst(irn) ? get_SymConst_entity(irn) : get_Sel_entity(irn); - tp = get_entity_type(ent); + tp = get_entity_type(entity); if (tp != get_CopyB_type(succ)) { /* bad, different types, might be a hidden conversion */ - return ir_address_taken; + res |= ir_usage_reinterpret_cast; + } + if (irn == get_CopyB_dst(succ)) { + res |= ir_usage_write; + } else { + assert(irn == get_CopyB_src(succ)); + res |= ir_usage_read; } break; + case iro_Add: + case iro_Sub: + /* Check the successor of irn. */ + res |= determine_entity_usage(succ, entity); + break; case iro_Sel: { + ir_entity *sel_entity = get_Sel_entity(succ); + /* this analysis can't handle unions correctly */ + if (is_Union_type(get_entity_owner(sel_entity))) { + res |= ir_usage_unknown; + break; + } /* Check the successor of irn. */ - ir_address_taken_state res = find_address_taken_state(succ); - if (res != ir_address_not_taken) - return res; + res |= determine_entity_usage(succ, sel_entity); break; } case iro_Call: - /* Only the call address is not an address taker but - this is an uninteresting case, so we ignore it here. */ - for (j = get_Call_n_params(succ) - 1; j >= 0; --j) { - ir_node *param = get_Call_param(succ, j); - if (param == irn) - return ir_address_taken; + if (irn == get_Call_ptr(succ)) { + /* TODO: we could check for reinterpret casts here... + * But I doubt anyone is interested in that bit for + * function entities and I'm too lazy to write the code now. + */ + res |= ir_usage_read; + } else { + assert(irn != get_Call_mem(succ)); + res |= ir_usage_unknown; + } + break; + + /* skip identities */ + case iro_Id: + res |= determine_entity_usage(succ, entity); + break; + + /* skip tuples */ + case iro_Tuple: { + int input_nr; + for (input_nr = get_Tuple_n_preds(succ) - 1; input_nr >= 0; + --input_nr) { + ir_node *pred = get_Tuple_pred(succ, input_nr); + if (pred == irn) { + int k; + /* we found one input */ + for (k = get_irn_n_outs(succ) - 1; k >= 0; --k) { + ir_node *proj = get_irn_out(succ, k); + + if (is_Proj(proj) && get_Proj_proj(proj) == input_nr) { + res |= determine_entity_usage(proj, entity); + break; + } + } + } } break; + } default: - /* another op, the address may be taken */ - return ir_address_taken_unknown; + /* another op, we don't know anything (we could do more advanced + * things like a dataflow analysis here) */ + res |= ir_usage_unknown; + break; } } - /* All successors finished, the address is not taken. */ - return ir_address_not_taken; -} /* find_address_taken_state */ + + return (ir_entity_usage) res; +} /** - * Update the "address taken" flag of all frame entities. + * Update the usage flags of all frame entities. */ -static void analyse_irg_address_taken(ir_graph *irg) { +static void analyse_irg_entity_usage(ir_graph *irg) +{ ir_type *ft = get_irg_frame_type(irg); ir_node *irg_frame; - int i; + 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); - set_entity_address_taken(ent, ir_address_not_taken); + /* methods can only be analyzed globally */ + if (! is_method_entity(ent)) { + ir_entity_usage flags = ir_usage_none; + if (get_entity_linkage(ent) & IR_LINKAGE_HIDDEN_USER) + flags = ir_usage_unknown; + set_entity_usage(ent, flags); + } } - 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); - ir_address_taken_state state; + 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; + + if (!is_Sel(succ)) + continue; + + entity = get_Sel_entity(succ); + flags = get_entity_usage(entity); + flags |= determine_entity_usage(succ, entity); + set_entity_usage(entity, (ir_entity_usage) flags); + } + + /* check inner functions accessing outer frame */ + static_link_arg = 0; + 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; + + if (! is_method_entity(ent)) + continue; + + inner_irg = get_entity_irg(ent); + if (inner_irg == NULL) + continue; + + assure_irg_outs(inner_irg); + args = get_irg_args(inner_irg); + for (j = get_irn_n_outs(args) - 1; j >= 0; --j) { + ir_node *arg = get_irn_out(args, j); - if (is_Sel(succ)) { - ir_entity *ent = get_Sel_entity(succ); + if (get_Proj_proj(arg) == static_link_arg) { + for (k = get_irn_n_outs(arg) - 1; k >= 0; --k) { + ir_node *succ = get_irn_out(arg, k); - if (get_entity_address_taken(ent) == ir_address_taken) - continue; + if (is_Sel(succ)) { + ir_entity *entity = get_Sel_entity(succ); - state = find_address_taken_state(succ); - if (state > get_entity_address_taken(ent)) - set_entity_address_taken(ent, state); + if (get_entity_owner(entity) == ft) { + /* found an access to the outer frame */ + unsigned flags; + + flags = get_entity_usage(entity); + flags |= determine_entity_usage(succ, entity); + set_entity_usage(entity, (ir_entity_usage) flags); + } + } + } + } } } - /* now computed */ - irg->adr_taken_state = ir_address_taken_computed; -} /* analyse_address_taken */ -/* Returns the current address taken state of the graph. */ -ir_address_taken_computed_state get_irg_address_taken_state(const ir_graph *irg) { - return irg->adr_taken_state; -} /* get_irg_address_taken_state */ + /* now computed */ + add_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE); +} -/* Sets the current address taken state of the graph. */ -void set_irg_address_taken_state(ir_graph *irg, ir_address_taken_computed_state state) { - irg->adr_taken_state = state; -} /* set_irg_address_taken_state */ +void assure_irg_entity_usage_computed(ir_graph *irg) +{ + if (irg_has_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE)) + return; -/* Assure that the address taken flag is computed for the given graph. */ -void assure_irg_address_taken_computed(ir_graph *irg) { - if (irg->adr_taken_state == ir_address_taken_not_computed) - analyse_irg_address_taken(irg); -} /* assure_irg_address_taken_computed */ + analyse_irg_entity_usage(irg); +} /** - * Initialize the address_taken flag for a global type like type. + * Initialize the entity_usage flag for a global type like type. */ -static void init_taken_flag(ir_type * tp) { - int i; +static void init_entity_usage(ir_type *tp) +{ + size_t i, n; - /* All external visible entities are at least - ir_address_taken_unknown. This is very conservative. */ - for (i = get_compound_n_members(tp) - 1; i >= 0; --i) { - ir_entity *ent = get_compound_member(tp, i); - ir_address_taken_state state; + /* We have to be conservative: All external visible entities are unknown */ + 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; - state = get_entity_visibility(ent) == visibility_external_visible ? - ir_address_taken_unknown : ir_address_not_taken ; - set_entity_address_taken(ent, state); + if (entity_is_externally_visible(ent)) { + flags |= ir_usage_unknown; + } + set_entity_usage(ent, (ir_entity_usage) flags); } -} /* init_taken_flag */ +} +/** + * Mark all entities used in the initializer as unknown usage. + * + * @param initializer the initializer to check + */ static void check_initializer_nodes(ir_initializer_t *initializer) { - switch(initializer->kind) { - case IR_INITIALIZER_CONST: { - ir_node *n = initializer->consti.value; + 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_SymConst_addr_ent(n)) { ir_entity *ent = get_SymConst_entity(n); - set_entity_address_taken(ent, ir_address_taken); + set_entity_usage(ent, ir_usage_unknown); } return; - } case IR_INITIALIZER_TARVAL: case IR_INITIALIZER_NULL: return; - case IR_INITIALIZER_COMPOUND: { - size_t i; - - for(i = 0; i < initializer->compound.n_initializers; ++i) { + case IR_INITIALIZER_COMPOUND: + for (i = 0; i < initializer->compound.n_initializers; ++i) { ir_initializer_t *sub_initializer = initializer->compound.initializers[i]; check_initializer_nodes(sub_initializer); } return; } - } - panic("invalid initialzier found"); + panic("invalid initializer found"); } /** - * Mark all entities used in the initializer for the given entity as address taken + * Mark all entities used in the initializer for the given entity as unknown + * usage. + * + * @param ent the entity */ -static void check_initializer(ir_entity *ent) { - ir_node *n; - int i; - - /* do not check uninitialized values */ - if (get_entity_variability(ent) == variability_uninitialized) - return; - - /* Beware: Methods initialized with "themself". This does not count as a taken - address. */ +static void check_initializer(ir_entity *ent) +{ + /* 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 + */ if (is_Method_type(get_entity_type(ent))) return; - if (ent->has_initializer) { - check_initializer_nodes(ent->attr.initializer); - } else if (is_atomic_entity(ent)) { - /* let's check if it's an address */ - n = get_atomic_ent_value(ent); - if (is_SymConst_addr_ent(n)) { - ir_entity *ent = get_SymConst_entity(n); - set_entity_address_taken(ent, ir_address_taken); - } - } else { - for (i = get_compound_ent_n_values(ent) - 1; i >= 0; --i) { - n = get_compound_ent_value(ent, i); - - /* let's check if it's an address */ - if (is_SymConst_addr_ent(n)) { - ir_entity *ent = get_SymConst_entity(n); - set_entity_address_taken(ent, ir_address_taken); - } - } + if (ent->initializer != NULL) { + check_initializer_nodes(ent->initializer); } -} /* check_initializer */ +} /** - * Mark all entities used in initializers as address taken + * Mark all entities used in initializers as unknown usage. + * + * @param tp a compound type */ -static void check_initializers(ir_type *tp) { - int i; +static void check_initializers(ir_type *tp) +{ + 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 /** - * Print the address taken state of all entities of a given type for debugging. + * Print the entity usage flags of all entities of a given type for debugging. + * + * @param tp a compound type */ -static void print_address_taken_state(ir_type *tp) { - int i; - for (i = get_compound_n_members(tp) - 1; i >= 0; --i) { +static void print_entity_usage_flags(const ir_type *tp) +{ + 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_address_taken_state state = get_entity_address_taken(ent); - - if (state != ir_address_not_taken) { - assert(ir_address_not_taken <= (int) state && state <= ir_address_taken); - ir_printf("%+F: %s\n", ent, get_address_taken_state_name(state)); - } + ir_entity_usage flags = get_entity_usage(ent); + + if (flags == 0) + continue; + ir_printf("%+F:", ent); + if (flags & ir_usage_address_taken) + printf(" address_taken"); + if (flags & ir_usage_read) + printf(" read"); + if (flags & ir_usage_write) + printf(" write"); + if (flags & ir_usage_reinterpret_cast) + printf(" reinterp_cast"); + printf("\n"); } -} /* print_address_taken_state */ +} #endif /* DEBUG_libfirm */ /** * Post-walker: check for global entity address */ -static void check_global_address(ir_node *irn, void *env) { - ir_node *tls = env; +static void check_global_address(ir_node *irn, void *data) +{ ir_entity *ent; - ir_address_taken_state state; + unsigned flags; + (void) data; if (is_SymConst_addr_ent(irn)) { /* A global. */ ent = get_SymConst_entity(irn); - } else if (is_Sel(irn) && get_Sel_ptr(irn) == tls) { - /* A TLS variable. */ - ent = get_Sel_entity(irn); } else return; - if (get_entity_address_taken(ent) >= ir_address_taken) { - /* Already at the maximum. */ - return; - } - state = find_address_taken_state(irn); - if (state > get_entity_address_taken(ent)) - set_entity_address_taken(ent, state); -} /* check_global_address */ + flags = get_entity_usage(ent); + flags |= determine_entity_usage(irn, ent); + set_entity_usage(ent, (ir_entity_usage) flags); +} /** - * Update the "address taken" flag of all global entities. + * Update the entity usage flags of all global entities. */ -static void analyse_irp_globals_address_taken(void) { - int i; - - FIRM_DBG_REGISTER(dbg, "firm.ana.irmemory"); +static void analyse_irp_globals_entity_usage(void) +{ + size_t i, n; + ir_segment_t s; - init_taken_flag(get_glob_type()); - init_taken_flag(get_tls_type()); + for (s = IR_SEGMENT_FIRST; s <= IR_SEGMENT_LAST; ++s) { + ir_type *type = get_segment_type(s); + init_entity_usage(type); + } - check_initializers(get_glob_type()); - check_initializers(get_tls_type()); + for (s = IR_SEGMENT_FIRST; s <= IR_SEGMENT_LAST; ++s) { + ir_type *type = get_segment_type(s); + 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 if (firm_dbg_get_mask(dbg) & LEVEL_1) { - print_address_taken_state(get_glob_type()); - print_address_taken_state(get_tls_type()); + for (s = IR_SEGMENT_FIRST; s <= IR_SEGMENT_LAST; ++s) { + print_entity_usage_flags(get_segment_type(s)); + } } #endif /* DEBUG_libfirm */ /* now computed */ - irp->globals_adr_taken_state = ir_address_taken_computed; -} /* analyse_irp_globals_address_taken */ + irp->globals_entity_usage_state = ir_entity_usage_computed; +} -/* Returns the current address taken state of the globals. */ -ir_address_taken_computed_state get_irp_globals_address_taken_state(void) { - return irp->globals_adr_taken_state; -} /* get_irp_globals_address_taken_state */ +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_address_taken_state(ir_address_taken_computed_state state) { - irp->globals_adr_taken_state = state; -} /* set_irg_address_taken_state */ +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_address_taken_computed(void) { - if (irp->globals_adr_taken_state == ir_address_taken_not_computed) - analyse_irp_globals_address_taken(); -} /* assure_irp_globals_address_taken_computed */ +void assure_irp_globals_entity_usage_computed(void) +{ + if (irp->globals_entity_usage_state != ir_entity_usage_not_computed) + return; + analyse_irp_globals_entity_usage(); +} -#include -#include "typerep.h" +void firm_init_memory_disambiguator(void) +{ + FIRM_DBG_REGISTER(dbg, "firm.ana.irmemory"); + FIRM_DBG_REGISTER(dbgcall, "firm.opt.cc"); +} -DEBUG_ONLY(static firm_dbg_module_t *dbgcall = NULL;) /** Maps method types to cloned method types. */ static pmap *mtp_map; /** * Clone a method type if not already cloned. + * + * @param tp the type to clone */ -static ir_type *clone_type_and_cache(ir_type *tp) { - static ident *prefix = NULL; - ir_type *res; - pmap_entry *e = pmap_find(mtp_map, tp); - - if (e) - return e->value; - - if (prefix == NULL) - prefix = new_id_from_chars("C", 1); +static ir_type *clone_type_and_cache(ir_type *tp) +{ + ir_type *res = pmap_get(ir_type, mtp_map, tp); - res = clone_type_method(tp, prefix); - pmap_insert(mtp_map, tp, res); - DB((dbgcall, LEVEL_2, "cloned type %+F into %+F\n", tp, res)); + if (res == NULL) { + res = clone_type_method(tp); + pmap_insert(mtp_map, tp, res); + } return res; -} /* clone_type_and_cache */ +} /** - * Copy the calling conventions from the entities to the call type. + * Walker: clone all call types of Calls to methods having the + * mtp_property_private property set. */ -static void update_calls_to_private(ir_node *call, void *env) { +static void update_calls_to_private(ir_node *call, void *env) +{ (void) env; if (is_Call(call)) { ir_node *ptr = get_Call_ptr(call); @@ -1131,43 +1271,41 @@ static void update_calls_to_private(ir_node *call, void *env) { if (get_entity_additional_properties(ent) & mtp_property_private) { if ((get_method_additional_properties(ctp) & mtp_property_private) == 0) { ctp = clone_type_and_cache(ctp); - set_method_additional_property(ctp, mtp_property_private); + add_method_additional_properties(ctp, mtp_property_private); set_Call_type(call, ctp); - DB((dbgcall, LEVEL_1, "changed call to private method %+F\n", ent)); + DB((dbgcall, LEVEL_1, "changed call to private method %+F using cloned type %+F\n", ent, ctp)); } } } } -} /* 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; +void mark_private_methods(void) +{ + size_t i, n; int changed = 0; - FIRM_DBG_REGISTER(dbgcall, "firm.opt.cc"); - - assure_irp_globals_address_taken_computed(); + assure_irp_globals_entity_usage_computed(); 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) { - ir_graph *irg = get_irp_irg(i); - ir_entity *ent = get_irg_entity(irg); - ir_address_taken_state state = get_entity_address_taken(ent); + 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 (get_entity_visibility(ent) == visibility_local && - state == ir_address_not_taken) { + if (!(flags & ir_usage_address_taken) && !entity_is_externally_visible(ent)) { ir_type *mtp = get_entity_type(ent); - set_entity_additional_property(ent, mtp_property_private); + add_entity_additional_properties(ent, mtp_property_private); DB((dbgcall, LEVEL_1, "found private method %+F\n", ent)); if ((get_method_additional_properties(mtp) & mtp_property_private) == 0) { /* need a new type */ mtp = clone_type_and_cache(mtp); + add_method_additional_properties(mtp, mtp_property_private); set_entity_type(ent, mtp); - set_method_additional_property(mtp, mtp_property_private); + DB((dbgcall, LEVEL_2, "changed entity type of %+F to %+F\n", ent, mtp)); changed = 1; } } @@ -1177,4 +1315,9 @@ void mark_private_methods(void) { all_irg_walk(NULL, update_calls_to_private, NULL); pmap_destroy(mtp_map); -} /* 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); +}