X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fopt%2Fldstopt.c;h=3667f26f6d95393eebe278dce0d9c187b651333c;hb=98beada6bb7ecbc2748b98f5e3b0ecfaa5a49144;hp=c43680282673571ba5abc5f2068143c859f6fe83;hpb=ab182d4b9ed44239ab3ff1d08b2f8e14a3699ccf;p=libfirm diff --git a/ir/opt/ldstopt.c b/ir/opt/ldstopt.c index c43680282..3667f26f6 100644 --- a/ir/opt/ldstopt.c +++ b/ir/opt/ldstopt.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. * @@ -21,7 +21,6 @@ * @file * @brief Load/Store optimizations. * @author Michael Beck - * @version $Id$ */ #include "config.h" @@ -35,6 +34,7 @@ #include "ircons_t.h" #include "irgmod.h" #include "irgwalk.h" +#include "irtools.h" #include "tv_t.h" #include "dbginfo_t.h" #include "iropt_dbg.h" @@ -43,24 +43,20 @@ #include "irhooks.h" #include "iredges.h" #include "irpass.h" -#include "opt_polymorphy.h" #include "irmemory.h" -#include "irphase_t.h" +#include "irnodehashmap.h" #include "irgopt.h" #include "set.h" +#include "be.h" #include "debug.h" /** The debug handle. */ DEBUG_ONLY(static firm_dbg_module_t *dbg;) -#ifdef DO_CACHEOPT -#include "cacheopt/cachesim.h" -#endif - #undef IMAX -#define IMAX(a,b) ((a) > (b) ? (a) : (b)) +#define IMAX(a,b) ((a) > (b) ? (a) : (b)) -#define MAX_PROJ IMAX(IMAX(pn_Load_max, pn_Store_max), pn_Call_max) +#define MAX_PROJ IMAX(IMAX((long)pn_Load_max, (long)pn_Store_max), (long)pn_Call_max) enum changes_t { DF_CHANGED = 1, /**< data flow changed */ @@ -77,7 +73,7 @@ typedef struct walk_env_t { /** A Load/Store info. */ typedef struct ldst_info_t { - ir_node *projs[MAX_PROJ]; /**< list of Proj's of this node */ + ir_node *projs[MAX_PROJ+1]; /**< list of Proj's of this node */ ir_node *exc_block; /**< the exception block if available */ int exc_idx; /**< predecessor index in the exception block */ unsigned visited; /**< visited counter for breaking loops */ @@ -110,7 +106,7 @@ static unsigned master_visited = 0; */ static ldst_info_t *get_ldst_info(ir_node *node, struct obstack *obst) { - ldst_info_t *info = get_irn_link(node); + ldst_info_t *info = (ldst_info_t*)get_irn_link(node); if (! info) { info = OALLOCZ(obst, ldst_info_t); @@ -124,7 +120,7 @@ static ldst_info_t *get_ldst_info(ir_node *node, struct obstack *obst) */ static block_info_t *get_block_info(ir_node *node, struct obstack *obst) { - block_info_t *info = get_irn_link(node); + block_info_t *info = (block_info_t*)get_irn_link(node); if (! info) { info = OALLOCZ(obst, block_info_t); @@ -179,10 +175,10 @@ static unsigned update_exc(ldst_info_t *info, ir_node *block, int pos) */ static void collect_nodes(ir_node *node, void *env) { - ir_opcode opcode = get_irn_opcode(node); + walk_env_t *wenv = (walk_env_t *)env; + unsigned opcode = get_irn_opcode(node); ir_node *pred, *blk, *pred_blk; ldst_info_t *ldst_info; - walk_env_t *wenv = env; if (opcode == iro_Proj) { pred = get_Proj_pred(node); @@ -218,7 +214,7 @@ static void collect_nodes(ir_node *node, void *env) if (is_Proj(proj)) { pred = get_Proj_pred(proj); - is_exc = get_Proj_proj(proj) == pn_Generic_X_except; + is_exc = is_x_except_Proj(proj); } /* ignore Bad predecessors, they will be removed later */ @@ -270,10 +266,10 @@ static ir_entity *find_constant_entity(ir_node *ptr) int i, n; for (i = 0, n = get_Sel_n_indexs(ptr); i < n; ++i) { - ir_node *bound; - tarval *tlower, *tupper; - ir_node *index = get_Sel_index(ptr, i); - tarval *tv = computed_value(index); + ir_node *bound; + ir_tarval *tlower, *tupper; + ir_node *index = get_Sel_index(ptr, i); + ir_tarval *tv = computed_value(index); /* check if the index is constant */ if (tv == tarval_bad) @@ -287,9 +283,9 @@ static ir_entity *find_constant_entity(ir_node *ptr) if (tlower == tarval_bad || tupper == tarval_bad) return NULL; - if (tarval_cmp(tv, tlower) & pn_Cmp_Lt) + if (tarval_cmp(tv, tlower) == ir_relation_less) return NULL; - if (tarval_cmp(tupper, tv) & pn_Cmp_Lt) + if (tarval_cmp(tupper, tv) == ir_relation_less) return NULL; /* ok, bounds check finished */ @@ -319,7 +315,7 @@ static ir_entity *find_constant_entity(ir_node *ptr) ir_node *l = get_Sub_left(ptr); ir_node *r = get_Sub_right(ptr); - if (get_irn_mode(l) == get_irn_mode(ptr) && is_Const(r)) + if (get_irn_mode(l) == get_irn_mode(ptr) && is_Const(r)) ptr = l; else return NULL; @@ -341,172 +337,10 @@ static long get_Sel_array_index_long(ir_node *n, int dim) return get_tarval_long(get_Const_tarval(index)); } /* get_Sel_array_index_long */ -/** - * Returns the accessed component graph path for an - * node computing an address. - * - * @param ptr the node computing the address - * @param depth current depth in steps upward from the root - * of the address - */ -static compound_graph_path *rec_get_accessed_path(ir_node *ptr, int depth) -{ - compound_graph_path *res = NULL; - ir_entity *root, *field, *ent; - int path_len, pos, idx; - tarval *tv; - ir_type *tp; - - if (is_SymConst(ptr)) { - /* a SymConst. If the depth is 0, this is an access to a global - * entity and we don't need a component path, else we know - * at least its length. - */ - assert(get_SymConst_kind(ptr) == symconst_addr_ent); - root = get_SymConst_entity(ptr); - res = (depth == 0) ? NULL : new_compound_graph_path(get_entity_type(root), depth); - } else if (is_Sel(ptr)) { - /* it's a Sel, go up until we find the root */ - res = rec_get_accessed_path(get_Sel_ptr(ptr), depth+1); - if (res == NULL) - return NULL; - - /* fill up the step in the path at the current position */ - field = get_Sel_entity(ptr); - path_len = get_compound_graph_path_length(res); - pos = path_len - depth - 1; - set_compound_graph_path_node(res, pos, field); - - if (is_Array_type(get_entity_owner(field))) { - assert(get_Sel_n_indexs(ptr) == 1 && "multi dim arrays not implemented"); - set_compound_graph_path_array_index(res, pos, get_Sel_array_index_long(ptr, 0)); - } - } else if (is_Add(ptr)) { - ir_node *l = get_Add_left(ptr); - ir_node *r = get_Add_right(ptr); - ir_mode *mode = get_irn_mode(ptr); - tarval *tmp; - - if (is_Const(r) && get_irn_mode(l) == mode) { - ptr = l; - tv = get_Const_tarval(r); - } else { - ptr = r; - tv = get_Const_tarval(l); - } -ptr_arith: - mode = get_tarval_mode(tv); - tmp = tv; - - /* ptr must be a Sel or a SymConst, this was checked in find_constant_entity() */ - if (is_Sel(ptr)) { - field = get_Sel_entity(ptr); - } else { - field = get_SymConst_entity(ptr); - } - idx = 0; - for (ent = field;;) { - unsigned size; - tarval *sz, *tv_index, *tlower, *tupper; - ir_node *bound; - - tp = get_entity_type(ent); - if (! is_Array_type(tp)) - break; - ent = get_array_element_entity(tp); - size = get_type_size_bytes(get_entity_type(ent)); - sz = new_tarval_from_long(size, mode); - - tv_index = tarval_div(tmp, sz); - tmp = tarval_mod(tmp, sz); - - if (tv_index == tarval_bad || tmp == tarval_bad) - return NULL; - - assert(get_array_n_dimensions(tp) == 1 && "multiarrays not implemented"); - bound = get_array_lower_bound(tp, 0); - tlower = computed_value(bound); - bound = get_array_upper_bound(tp, 0); - tupper = computed_value(bound); - - if (tlower == tarval_bad || tupper == tarval_bad) - return NULL; - - if (tarval_cmp(tv_index, tlower) & pn_Cmp_Lt) - return NULL; - if (tarval_cmp(tupper, tv_index) & pn_Cmp_Lt) - return NULL; - - /* ok, bounds check finished */ - ++idx; - } - if (! tarval_is_null(tmp)) { - /* access to some struct/union member */ - return NULL; - } - - /* should be at least ONE array */ - if (idx == 0) - return NULL; - - res = rec_get_accessed_path(ptr, depth + idx); - if (res == NULL) - return NULL; - - path_len = get_compound_graph_path_length(res); - pos = path_len - depth - idx; - - for (ent = field;;) { - unsigned size; - tarval *sz, *tv_index; - long index; - - tp = get_entity_type(ent); - if (! is_Array_type(tp)) - break; - ent = get_array_element_entity(tp); - set_compound_graph_path_node(res, pos, ent); - - size = get_type_size_bytes(get_entity_type(ent)); - sz = new_tarval_from_long(size, mode); - - tv_index = tarval_div(tv, sz); - tv = tarval_mod(tv, sz); - - /* worked above, should work again */ - assert(tv_index != tarval_bad && tv != tarval_bad); - - /* bounds already checked above */ - index = get_tarval_long(tv_index); - set_compound_graph_path_array_index(res, pos, index); - ++pos; - } - } else if (is_Sub(ptr)) { - ir_node *l = get_Sub_left(ptr); - ir_node *r = get_Sub_right(ptr); - - ptr = l; - tv = get_Const_tarval(r); - tv = tarval_neg(tv); - goto ptr_arith; - } - return res; -} /* rec_get_accessed_path */ - -/** - * Returns an access path or NULL. The access path is only - * valid, if the graph is in phase_high and _no_ address computation is used. - */ -static compound_graph_path *get_accessed_path(ir_node *ptr) -{ - compound_graph_path *gr = rec_get_accessed_path(ptr, 0); - return gr; -} /* get_accessed_path */ - typedef struct path_entry { ir_entity *ent; struct path_entry *next; - long index; + size_t index; } path_entry; static ir_node *rec_find_compound_ent_value(ir_node *ptr, path_entry *next) @@ -514,9 +348,9 @@ static ir_node *rec_find_compound_ent_value(ir_node *ptr, path_entry *next) path_entry entry, *p; ir_entity *ent, *field; ir_initializer_t *initializer; - tarval *tv; + ir_tarval *tv; ir_type *tp; - unsigned n; + size_t n; entry.next = next; if (is_SymConst(ptr)) { @@ -539,7 +373,7 @@ static ir_node *rec_find_compound_ent_value(ir_node *ptr, path_entry *next) continue; } } - if (p->index >= (int) n) + if (p->index >= n) return NULL; initializer = get_initializer_compound_value(initializer, p->index); @@ -572,7 +406,7 @@ static ir_node *rec_find_compound_ent_value(ir_node *ptr, path_entry *next) assert(get_Sel_n_indexs(ptr) == 1 && "multi dim arrays not implemented"); entry.index = get_Sel_array_index_long(ptr, 0) - get_array_lower_bound_int(tp, 0); } else { - int i, n_members = get_compound_n_members(tp); + size_t i, n_members = get_compound_n_members(tp); for (i = 0; i < n_members; ++i) { if (get_compound_member(tp, i) == field) break; @@ -585,17 +419,19 @@ static ir_node *rec_find_compound_ent_value(ir_node *ptr, path_entry *next) } return rec_find_compound_ent_value(get_Sel_ptr(ptr), &entry); } else if (is_Add(ptr)) { - ir_node *l = get_Add_left(ptr); - ir_node *r = get_Add_right(ptr); ir_mode *mode; unsigned pos; - if (is_Const(r)) { - ptr = l; - tv = get_Const_tarval(r); - } else { - ptr = r; - tv = get_Const_tarval(l); + { + ir_node *l = get_Add_left(ptr); + ir_node *r = get_Add_right(ptr); + if (is_Const(r)) { + ptr = l; + tv = get_Const_tarval(r); + } else { + ptr = r; + tv = get_Const_tarval(l); + } } ptr_arith: mode = get_tarval_mode(tv); @@ -626,10 +462,10 @@ ptr_arith: /* fill them up */ pos = 0; for (ent = field;;) { - unsigned size; - tarval *sz, *tv_index, *tlower, *tupper; - long index; - ir_node *bound; + unsigned size; + ir_tarval *sz, *tv_index, *tlower, *tupper; + long index; + ir_node *bound; tp = get_entity_type(ent); if (! is_Array_type(tp)) @@ -656,9 +492,9 @@ ptr_arith: if (tlower == tarval_bad || tupper == tarval_bad) return NULL; - if (tarval_cmp(tv_index, tlower) & pn_Cmp_Lt) + if (tarval_cmp(tv_index, tlower) == ir_relation_less) return NULL; - if (tarval_cmp(tupper, tv_index) & pn_Cmp_Lt) + if (tarval_cmp(tupper, tv_index) == ir_relation_less) return NULL; /* ok, bounds check finished */ @@ -697,7 +533,7 @@ static void reduce_adr_usage(ir_node *ptr); */ static void handle_load_update(ir_node *load) { - ldst_info_t *info = get_irn_link(load); + ldst_info_t *info = (ldst_info_t*)get_irn_link(load); /* do NOT touch volatile loads for now */ if (get_Load_volatility(load) == volatility_is_volatile) @@ -731,7 +567,7 @@ static void reduce_adr_usage(ir_node *ptr) /* this Proj is dead now */ pred = get_Proj_pred(ptr); if (is_Load(pred)) { - ldst_info_t *info = get_irn_link(pred); + ldst_info_t *info = (ldst_info_t*)get_irn_link(pred); info->projs[get_Proj_proj(ptr)] = NULL; /* this node lost its result proj, handle that */ @@ -745,20 +581,29 @@ static void reduce_adr_usage(ir_node *ptr) */ static int can_use_stored_value(ir_mode *old_mode, ir_mode *new_mode) { + unsigned old_size; + unsigned new_size; if (old_mode == new_mode) - return 1; + return true; + + old_size = get_mode_size_bits(old_mode); + new_size = get_mode_size_bits(new_mode); /* if both modes are two-complement ones, we can always convert the - Stored value into the needed one. */ - if (get_mode_size_bits(old_mode) >= get_mode_size_bits(new_mode) && + Stored value into the needed one. (on big endian machines we currently + only support this for modes of same size) */ + if (old_size >= new_size && get_mode_arithmetic(old_mode) == irma_twos_complement && - get_mode_arithmetic(new_mode) == irma_twos_complement) - return 1; - return 0; -} /* can_use_stored_value */ + get_mode_arithmetic(new_mode) == irma_twos_complement && + (!be_get_backend_param()->byte_order_big_endian + || old_size == new_size)) { + return true; + } + return false; +} /** - * Check whether a Call is at least pure, ie. does only read memory. + * Check whether a Call is at least pure, i.e. does only read memory. */ static unsigned is_Call_pure(ir_node *call) { @@ -770,8 +615,8 @@ static unsigned is_Call_pure(ir_node *call) /* try the called entity */ ir_node *ptr = get_Call_ptr(call); - if (is_Global(ptr)) { - ir_entity *ent = get_Global_entity(ptr); + if (is_SymConst_addr_ent(ptr)) { + ir_entity *ent = get_SymConst_entity(ptr); prop = get_entity_additional_properties(ent); } @@ -866,7 +711,10 @@ static int try_load_after_store(ir_node *load, store_value = get_Store_value(store); if (delta != 0 || store_mode != load_mode) { - if (delta < 0 || delta + load_mode_len > store_mode_len) + /* TODO: implement for big-endian */ + if (delta < 0 || delta + load_mode_len > store_mode_len + || (be_get_backend_param()->byte_order_big_endian + && load_mode_len != store_mode_len)) return 0; if (get_mode_arithmetic(store_mode) != irma_twos_complement || @@ -877,9 +725,9 @@ static int try_load_after_store(ir_node *load, /* produce a shift to adjust offset delta */ if (delta > 0) { ir_node *cnst; + ir_graph *irg = get_irn_irg(load); - /* FIXME: only true for little endian */ - cnst = new_Const_long(mode_Iu, delta * 8); + cnst = new_r_Const_long(irg, mode_Iu, delta * 8); store_value = new_r_Shr(get_nodes_block(load), store_value, cnst, store_mode); } @@ -892,14 +740,15 @@ static int try_load_after_store(ir_node *load, DBG_OPT_RAW(load, store_value); - info = get_irn_link(load); + info = (ldst_info_t*)get_irn_link(load); if (info->projs[pn_Load_M]) exchange(info->projs[pn_Load_M], get_Load_mem(load)); res = 0; /* no exception */ if (info->projs[pn_Load_X_except]) { - exchange( info->projs[pn_Load_X_except], new_Bad()); + ir_graph *irg = get_irn_irg(load); + exchange( info->projs[pn_Load_X_except], new_r_Bad(irg, mode_X)); res |= CF_CHANGED; } if (info->projs[pn_Load_X_regular]) { @@ -929,31 +778,31 @@ static int try_load_after_store(ir_node *load, static unsigned follow_Mem_chain(ir_node *load, ir_node *curr) { unsigned res = 0; - ldst_info_t *info = get_irn_link(load); + ldst_info_t *info = (ldst_info_t*)get_irn_link(load); ir_node *pred; ir_node *ptr = get_Load_ptr(load); ir_node *mem = get_Load_mem(load); ir_mode *load_mode = get_Load_mode(load); for (pred = curr; load != pred; ) { - ldst_info_t *pred_info = get_irn_link(pred); + ldst_info_t *pred_info = (ldst_info_t*)get_irn_link(pred); /* * a Load immediately after a Store -- a read after write. * We may remove the Load, if both Load & Store does not have an - * exception handler OR they are in the same MacroBlock. In the latter + * exception handler OR they are in the same Block. In the latter * case the Load cannot throw an exception when the previous Store was * quiet. * * Why we need to check for Store Exception? If the Store cannot * be executed (ROM) the exception handler might simply jump into - * the load MacroBlock :-( + * the load Block :-( * We could make it a little bit better if we would know that the * exception handler of the Store jumps directly to the end... */ if (is_Store(pred) && ((pred_info->projs[pn_Store_X_except] == NULL && info->projs[pn_Load_X_except] == NULL) - || get_nodes_MacroBlock(load) == get_nodes_MacroBlock(pred))) + || get_nodes_block(load) == get_nodes_block(pred))) { long load_offset; ir_node *base_ptr = get_base_and_offset(ptr, &load_offset); @@ -965,14 +814,20 @@ static unsigned follow_Mem_chain(ir_node *load, ir_node *curr) can_use_stored_value(get_Load_mode(pred), load_mode)) { /* * a Load after a Load -- a read after read. - * We may remove the second Load, if it does not have an exception handler - * OR they are in the same MacroBlock. In the later case the Load cannot - * throw an exception when the previous Load was quiet. + * We may remove the second Load, if it does not have an exception + * handler OR they are in the same Block. In the later case + * the Load cannot throw an exception when the previous Load was + * quiet. * - * Here, there is no need to check if the previous Load has an exception - * hander because they would have exact the same exception... + * Here, there is no need to check if the previous Load has an + * exception hander because they would have exact the same + * exception... + * + * TODO: implement load-after-load with different mode for big + * endian */ - if (info->projs[pn_Load_X_except] == NULL || get_nodes_MacroBlock(load) == get_nodes_MacroBlock(pred)) { + if (info->projs[pn_Load_X_except] == NULL + || get_nodes_block(load) == get_nodes_block(pred)) { ir_node *value; DBG_OPT_RAR(load, pred); @@ -998,7 +853,8 @@ static unsigned follow_Mem_chain(ir_node *load, ir_node *curr) /* no exception */ if (info->projs[pn_Load_X_except]) { - exchange(info->projs[pn_Load_X_except], new_Bad()); + ir_graph *irg = get_irn_irg(load); + exchange(info->projs[pn_Load_X_except], new_r_Bad(irg, mode_X)); res |= CF_CHANGED; } if (info->projs[pn_Load_X_regular]) { @@ -1015,7 +871,6 @@ static unsigned follow_Mem_chain(ir_node *load, ir_node *curr) if (is_Store(pred)) { /* check if we can pass through this store */ ir_alias_relation rel = get_alias_relation( - current_ir_graph, get_Store_ptr(pred), get_irn_mode(get_Store_value(pred)), ptr, load_mode); @@ -1065,27 +920,23 @@ static unsigned follow_Mem_chain(ir_node *load, ir_node *curr) */ ir_node *can_replace_load_by_const(const ir_node *load, ir_node *c) { - ir_mode *c_mode = get_irn_mode(c); - ir_mode *l_mode = get_Load_mode(load); - ir_node *res = NULL; + ir_mode *c_mode = get_irn_mode(c); + ir_mode *l_mode = get_Load_mode(load); + ir_node *block = get_nodes_block(load); + dbg_info *dbgi = get_irn_dbg_info(load); + ir_node *res = copy_const_value(dbgi, c, block); if (c_mode != l_mode) { /* check, if the mode matches OR can be easily converted info */ if (is_reinterpret_cast(c_mode, l_mode)) { - /* we can safely cast */ - dbg_info *dbg = get_irn_dbg_info(load); - ir_node *block = get_nodes_block(load); - /* copy the value from the const code irg and cast it */ - res = copy_const_value(dbg, c); - res = new_rd_Conv(dbg, block, res, l_mode); + res = new_rd_Conv(dbgi, block, res, l_mode); + } else { + return NULL; } - } else { - /* copy the value from the const code irg */ - res = copy_const_value(get_irn_dbg_info(load), c); } return res; -} /* can_replace_load_by_const */ +} /** * optimize a Load @@ -1094,7 +945,7 @@ ir_node *can_replace_load_by_const(const ir_node *load, ir_node *c) */ static unsigned optimize_load(ir_node *load) { - ldst_info_t *info = get_irn_link(load); + ldst_info_t *info = (ldst_info_t*)get_irn_link(load); ir_node *mem, *ptr, *value; ir_entity *ent; long dummy; @@ -1125,56 +976,53 @@ static unsigned optimize_load(ir_node *load) return res | DF_CHANGED; } - /* Load from a constant polymorphic field, where we can resolve - polymorphism. */ - value = transform_polymorph_Load(load); - if (value == load) { - value = NULL; - /* check if we can determine the entity that will be loaded */ - ent = find_constant_entity(ptr); - if (ent != NULL - && get_entity_visibility(ent) != ir_visibility_external) { - /* a static allocation that is not external: there should be NO - * exception when loading even if we cannot replace the load itself. - */ - - /* no exception, clear the info field as it might be checked later again */ - if (info->projs[pn_Load_X_except]) { - exchange(info->projs[pn_Load_X_except], new_Bad()); - info->projs[pn_Load_X_except] = NULL; - res |= CF_CHANGED; - } - if (info->projs[pn_Load_X_regular]) { - exchange(info->projs[pn_Load_X_regular], new_r_Jmp(get_nodes_block(load))); - info->projs[pn_Load_X_regular] = NULL; - res |= CF_CHANGED; - } - - if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) { - if (ent->initializer != NULL) { - /* new style initializer */ - value = find_compound_ent_value(ptr); - } else if (entity_has_compound_ent_values(ent)) { - /* old style initializer */ - compound_graph_path *path = get_accessed_path(ptr); + value = NULL; + /* check if we can determine the entity that will be loaded */ + ent = find_constant_entity(ptr); + if (ent != NULL + && get_entity_visibility(ent) != ir_visibility_external) { + /* a static allocation that is not external: there should be NO + * exception when loading even if we cannot replace the load itself. + */ - if (path != NULL) { - assert(is_proper_compound_graph_path(path, get_compound_graph_path_length(path)-1)); + /* no exception, clear the info field as it might be checked later again */ + if (info->projs[pn_Load_X_except]) { + ir_graph *irg = get_irn_irg(load); + exchange(info->projs[pn_Load_X_except], new_r_Bad(irg, mode_X)); + info->projs[pn_Load_X_except] = NULL; + res |= CF_CHANGED; + } + if (info->projs[pn_Load_X_regular]) { + exchange(info->projs[pn_Load_X_regular], new_r_Jmp(get_nodes_block(load))); + info->projs[pn_Load_X_regular] = NULL; + res |= CF_CHANGED; + } - value = get_compound_ent_value_by_path(ent, path); - DB((dbg, LEVEL_1, " Constant access at %F%F resulted in %+F\n", ent, path, value)); - free_compound_graph_path(path); - } + if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) { + if (has_entity_initializer(ent)) { + /* new style initializer */ + value = find_compound_ent_value(ptr); + } + if (value != NULL) { + ir_graph *irg = get_irn_irg(load); + value = can_replace_load_by_const(load, value); + if (value != NULL && is_Sel(ptr)) { + /* frontend has inserted masking operations after bitfield accesses, + * so we might have to shift the const. */ + unsigned char bit_offset = get_entity_offset_bits_remainder(get_Sel_entity(ptr)); + ir_tarval *tv_old = get_Const_tarval(value); + ir_tarval *tv_offset = new_tarval_from_long(bit_offset, mode_Bu); + ir_tarval *tv_new = tarval_shl(tv_old, tv_offset); + value = new_r_Const(irg, tv_new); } - if (value != NULL) - value = can_replace_load_by_const(load, value); } } } if (value != NULL) { /* we completely replace the load by this value */ if (info->projs[pn_Load_X_except]) { - exchange(info->projs[pn_Load_X_except], new_Bad()); + ir_graph *irg = get_irn_irg(load); + exchange(info->projs[pn_Load_X_except], new_r_Bad(irg, mode_X)); info->projs[pn_Load_X_except] = NULL; res |= CF_CHANGED; } @@ -1245,17 +1093,16 @@ static int is_partially_same(ir_node *small, ir_node *large) static unsigned follow_Mem_chain_for_Store(ir_node *store, ir_node *curr) { unsigned res = 0; - ldst_info_t *info = get_irn_link(store); + ldst_info_t *info = (ldst_info_t*)get_irn_link(store); ir_node *pred; ir_node *ptr = get_Store_ptr(store); ir_node *mem = get_Store_mem(store); ir_node *value = get_Store_value(store); ir_mode *mode = get_irn_mode(value); ir_node *block = get_nodes_block(store); - ir_node *mblk = get_Block_MacroBlock(block); for (pred = curr; pred != store;) { - ldst_info_t *pred_info = get_irn_link(pred); + ldst_info_t *pred_info = (ldst_info_t*)get_irn_link(pred); /* * BEWARE: one might think that checking the modes is useless, because @@ -1267,9 +1114,9 @@ static unsigned follow_Mem_chain_for_Store(ir_node *store, ir_node *curr) * killed ... */ if (is_Store(pred) && get_Store_ptr(pred) == ptr && - get_nodes_MacroBlock(pred) == mblk) { + get_nodes_block(pred) == block) { /* - * a Store after a Store in the same MacroBlock -- a write after write. + * a Store after a Store in the same Block -- a write after write. */ /* @@ -1332,7 +1179,6 @@ static unsigned follow_Mem_chain_for_Store(ir_node *store, ir_node *curr) if (is_Store(pred)) { /* check if we can pass through this store */ ir_alias_relation rel = get_alias_relation( - current_ir_graph, get_Store_ptr(pred), get_irn_mode(get_Store_value(pred)), ptr, mode); @@ -1342,7 +1188,7 @@ static unsigned follow_Mem_chain_for_Store(ir_node *store, ir_node *curr) pred = skip_Proj(get_Store_mem(pred)); } else if (is_Load(pred)) { ir_alias_relation rel = get_alias_relation( - current_ir_graph, get_Load_ptr(pred), get_Load_mode(pred), + get_Load_ptr(pred), get_Load_mode(pred), ptr, mode); if (rel != ir_no_alias) break; @@ -1420,7 +1266,7 @@ static unsigned optimize_store(ir_node *store) /* a store to an entity which is never read is unnecessary */ if (entity != NULL && !(get_entity_usage(entity) & ir_usage_read)) { - ldst_info_t *info = get_irn_link(store); + ldst_info_t *info = (ldst_info_t*)get_irn_link(store); if (info->projs[pn_Store_X_except] == NULL) { DB((dbg, LEVEL_1, " Killing useless %+F to never read entity %+F\n", store, entity)); exchange(info->projs[pn_Store_M], get_Store_mem(store)); @@ -1465,7 +1311,10 @@ static unsigned optimize_store(ir_node *store) static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) { int i, n; - ir_node *store, *old_store, *ptr, *block, *phi_block, *phiM, *phiD, *exc, *projM; + ir_node *store, *ptr, *block, *phi_block, *phiM, *phiD, *exc, *projM; +#ifdef DO_CACHEOPT + ir_node *old_store; +#endif ir_mode *mode; ir_node **inM, **inD, **projMs; int *idx; @@ -1488,19 +1337,17 @@ static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) return 0; store = skip_Proj(projM); +#ifdef DO_CACHEOPT old_store = store; +#endif if (!is_Store(store)) return 0; block = get_nodes_block(store); - /* abort on dead blocks */ - if (is_Block_dead(block)) - return 0; - /* check if the block is post dominated by Phi-block and has no exception exit */ - bl_info = get_irn_link(block); + bl_info = (block_info_t*)get_irn_link(block); if (bl_info->flags & BLOCK_HAS_EXC) return 0; @@ -1511,7 +1358,7 @@ static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) /* this is the address of the store */ ptr = get_Store_ptr(store); mode = get_irn_mode(get_Store_value(store)); - info = get_irn_link(store); + info = (ldst_info_t*)get_irn_link(store); exc = info->exc_block; for (i = 1; i < n; ++i) { @@ -1527,22 +1374,19 @@ static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) if (ptr != get_Store_ptr(pred) || mode != get_irn_mode(get_Store_value(pred))) return 0; - info = get_irn_link(pred); + info = (ldst_info_t*)get_irn_link(pred); /* check, if all stores have the same exception flow */ if (exc != info->exc_block) return 0; - /* abort on dead blocks */ block = get_nodes_block(pred); - if (is_Block_dead(block)) - return 0; /* check if the block is post dominated by Phi-block and has no exception exit. Note that block must be different from Phi-block, else we would move a Store from end End of a block to its Start... */ - bl_info = get_irn_link(block); + bl_info = (block_info_t*)get_irn_link(block); if (bl_info->flags & BLOCK_HAS_EXC) return 0; if (block == phi_block || ! block_postdominates(phi_block, block)) @@ -1582,7 +1426,7 @@ static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) assert(is_Proj(projMs[i])); store = get_Proj_pred(projMs[i]); - info = get_irn_link(store); + info = (ldst_info_t*)get_irn_link(store); inM[i] = get_Store_mem(store); inD[i] = get_Store_value(store); @@ -1608,7 +1452,7 @@ static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) } /* fourth step: create the Store */ - store = new_rd_Store(db, block, phiM, ptr, phiD, 0); + store = new_rd_Store(db, block, phiM, ptr, phiD, cons_none); #ifdef DO_CACHEOPT co_set_irn_name(store, co_get_irn_ident(old_store)); #endif @@ -1648,7 +1492,7 @@ static unsigned optimize_phi(ir_node *phi, walk_env_t *wenv) */ static void do_load_store_optimize(ir_node *n, void *env) { - walk_env_t *wenv = env; + walk_env_t *wenv = (walk_env_t*)env; switch (get_irn_opcode(n)) { @@ -1665,13 +1509,13 @@ static void do_load_store_optimize(ir_node *n, void *env) break; default: - ; + break; } } /* do_load_store_optimize */ /** A scc. */ typedef struct scc { - ir_node *head; /**< the head of the list */ + ir_node *head; /**< the head of the list */ } scc; /** A node entry. */ @@ -1686,13 +1530,14 @@ typedef struct node_entry { /** A loop entry. */ typedef struct loop_env { - ir_phase ph; /**< the phase object */ - ir_node **stack; /**< the node stack */ - int tos; /**< tos index */ - unsigned nextDFSnum; /**< the current DFS number */ - unsigned POnum; /**< current post order number */ - - unsigned changes; /**< a bitmask of graph changes */ + ir_nodehashmap_t map; + struct obstack obst; + ir_node **stack; /**< the node stack */ + size_t tos; /**< tos index */ + unsigned nextDFSnum; /**< the current DFS number */ + unsigned POnum; /**< current post order number */ + + unsigned changes; /**< a bitmask of graph changes */ } loop_env; /** @@ -1700,13 +1545,12 @@ typedef struct loop_env { */ static node_entry *get_irn_ne(ir_node *irn, loop_env *env) { - ir_phase *ph = &env->ph; - node_entry *e = phase_get_irn_data(&env->ph, irn); + node_entry *e = (node_entry*)ir_nodehashmap_get(&env->map, irn); - if (! e) { - e = phase_alloc(ph, sizeof(*e)); + if (e == NULL) { + e = OALLOC(&env->obst, node_entry); memset(e, 0, sizeof(*e)); - phase_set_irn_data(ph, irn, e); + ir_nodehashmap_insert(&env->map, irn, e); } return e; } /* get_irn_ne */ @@ -1722,7 +1566,7 @@ static void push(loop_env *env, ir_node *n) node_entry *e; if (env->tos == ARR_LEN(env->stack)) { - int nlen = ARR_LEN(env->stack) * 2; + size_t nlen = ARR_LEN(env->stack) * 2; ARR_RESIZE(ir_node *, env->stack, nlen); } env->stack[env->tos++] = n; @@ -1782,8 +1626,8 @@ typedef struct avail_entry_t { */ static int cmp_avail_entry(const void *elt, const void *key, size_t size) { - const avail_entry_t *a = elt; - const avail_entry_t *b = key; + const avail_entry_t *a = (const avail_entry_t*)elt; + const avail_entry_t *b = (const avail_entry_t*)key; (void) size; return a->ptr != b->ptr || a->mode != b->mode; @@ -1794,7 +1638,7 @@ static int cmp_avail_entry(const void *elt, const void *key, size_t size) */ static unsigned hash_cache_entry(const avail_entry_t *entry) { - return get_irn_idx(entry->ptr) * 9 + HASH_PTR(entry->mode); + return get_irn_idx(entry->ptr) * 9 + hash_ptr(entry->mode); } /* hash_cache_entry */ /** @@ -1806,13 +1650,10 @@ static unsigned hash_cache_entry(const avail_entry_t *entry) static void move_loads_out_of_loops(scc *pscc, loop_env *env) { ir_node *phi, *load, *next, *other, *next_other; - ir_entity *ent; int j; phi_entry *phi_list = NULL; set *avail; - avail = new_set(cmp_avail_entry, 8); - /* collect all outer memories */ for (phi = pscc->head; phi != NULL; phi = next) { node_entry *ne = get_irn_ne(phi, env); @@ -1830,7 +1671,7 @@ static void move_loads_out_of_loops(scc *pscc, loop_env *env) if (pe->pscc != ne->pscc) { /* not in the same SCC, is region const */ - phi_entry *pe = phase_alloc(&env->ph, sizeof(*pe)); + phi_entry *pe = OALLOC(&env->obst, phi_entry); pe->phi = phi; pe->pos = j; @@ -1846,13 +1687,15 @@ static void move_loads_out_of_loops(scc *pscc, loop_env *env) if (phi_list->next != NULL) return; + avail = new_set(cmp_avail_entry, 8); + for (load = pscc->head; load; load = next) { ir_mode *load_mode; node_entry *ne = get_irn_ne(load, env); next = ne->next; if (is_Load(load)) { - ldst_info_t *info = get_irn_link(load); + ldst_info_t *info = (ldst_info_t*)get_irn_link(load); ir_node *ptr = get_Load_ptr(load); /* for now, we cannot handle Loads with exceptions */ @@ -1860,9 +1703,8 @@ static void move_loads_out_of_loops(scc *pscc, loop_env *env) continue; /* for now, we can only move Load(Global) */ - if (! is_Global(ptr)) + if (! is_SymConst_addr_ent(ptr)) continue; - ent = get_Global_entity(ptr); load_mode = get_Load_mode(load); for (other = pscc->head; other != NULL; other = next_other) { node_entry *ne = get_irn_ne(other, env); @@ -1870,7 +1712,6 @@ static void move_loads_out_of_loops(scc *pscc, loop_env *env) if (is_Store(other)) { ir_alias_relation rel = get_alias_relation( - current_ir_graph, get_Store_ptr(other), get_irn_mode(get_Store_value(other)), ptr, load_mode); @@ -1899,20 +1740,25 @@ static void move_loads_out_of_loops(scc *pscc, loop_env *env) entry.ptr = ptr; entry.mode = load_mode; - res = set_find(avail, &entry, sizeof(entry), hash_cache_entry(&entry)); + res = set_find(avail_entry_t, avail, &entry, sizeof(entry), hash_cache_entry(&entry)); if (res != NULL) { irn = res->load; } else { - irn = new_rd_Load(db, pred, get_Phi_pred(phi, pos), ptr, load_mode, 0); + irn = new_rd_Load(db, pred, get_Phi_pred(phi, pos), ptr, load_mode, cons_none); entry.load = irn; - set_insert(avail, &entry, sizeof(entry), hash_cache_entry(&entry)); + set_insert(avail_entry_t, avail, &entry, sizeof(entry), hash_cache_entry(&entry)); DB((dbg, LEVEL_1, " Created %+F in %+F\n", irn, pred)); } pe->load = irn; - ninfo = get_ldst_info(irn, phase_obst(&env->ph)); + ninfo = get_ldst_info(irn, &env->obst); ninfo->projs[pn_Load_M] = mem = new_r_Proj(irn, mode_M, pn_Load_M); - set_Phi_pred(phi, pos, mem); + if (res == NULL) { + /* irn is from cache, so do not set phi pred again. + * There might be other Loads between phi and irn already. + */ + set_Phi_pred(phi, pos, mem); + } ninfo->projs[pn_Load_res] = new_r_Proj(irn, load_mode, pn_Load_res); } @@ -2119,7 +1965,7 @@ static void dfs(ir_node *irn, loop_env *env) node->low = MIN(o->DFSnum, node->low); } } else if (is_fragile_op(irn)) { - ir_node *pred = get_fragile_op_mem(irn); + ir_node *pred = get_memop_mem(irn); node_entry *o = get_irn_ne(pred, env); if (!irn_visited(pred)) { @@ -2144,7 +1990,7 @@ static void dfs(ir_node *irn, loop_env *env) } if (node->low == node->DFSnum) { - scc *pscc = phase_alloc(&env->ph, sizeof(*pscc)); + scc *pscc = OALLOC(&env->obst, scc); ir_node *x; pscc->head = NULL; @@ -2170,11 +2016,9 @@ static void dfs(ir_node *irn, loop_env *env) */ static void do_dfs(ir_graph *irg, loop_env *env) { - ir_graph *rem = current_ir_graph; ir_node *endblk, *end; int i; - current_ir_graph = irg; inc_irg_visited(irg); /* visit all memory nodes */ @@ -2183,13 +2027,15 @@ static void do_dfs(ir_graph *irg, loop_env *env) ir_node *pred = get_Block_cfgpred(endblk, i); pred = skip_Proj(pred); - if (is_Return(pred)) + if (is_Return(pred)) { dfs(get_Return_mem(pred), env); - else if (is_Raise(pred)) + } else if (is_Raise(pred)) { dfs(get_Raise_mem(pred), env); - else if (is_fragile_op(pred)) - dfs(get_fragile_op_mem(pred), env); - else { + } else if (is_fragile_op(pred)) { + dfs(get_memop_mem(pred), env); + } else if (is_Bad(pred)) { + /* ignore non-optimized block predecessor */ + } else { assert(0 && "Unknown EndBlock predecessor"); } } @@ -2202,7 +2048,6 @@ static void do_dfs(ir_graph *irg, loop_env *env) if (is_Phi(ka) && !irn_visited(ka)) dfs(ka, env); } - current_ir_graph = rem; } /* do_dfs */ /** @@ -2219,13 +2064,15 @@ static int optimize_loops(ir_graph *irg) env.nextDFSnum = 0; env.POnum = 0; env.changes = 0; - phase_init(&env.ph, irg, phase_irn_init_default); + ir_nodehashmap_init(&env.map); + obstack_init(&env.obst); /* calculate the SCC's and drive loop optimization. */ do_dfs(irg, &env); DEL_ARR_F(env.stack); - phase_deinit(&env.ph); + obstack_free(&env.obst, NULL); + ir_nodehashmap_destroy(&env.map); return env.changes; } /* optimize_loops */ @@ -2233,26 +2080,24 @@ static int optimize_loops(ir_graph *irg) /* * do the load store optimization */ -int optimize_load_store(ir_graph *irg) +void optimize_load_store(ir_graph *irg) { walk_env_t env; + assure_irg_properties(irg, + IR_GRAPH_PROPERTY_NO_UNREACHABLE_CODE + | IR_GRAPH_PROPERTY_CONSISTENT_OUT_EDGES + | IR_GRAPH_PROPERTY_NO_CRITICAL_EDGES + | IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE + | IR_GRAPH_PROPERTY_CONSISTENT_ENTITY_USAGE); + FIRM_DBG_REGISTER(dbg, "firm.opt.ldstopt"); assert(get_irg_phase_state(irg) != phase_building); assert(get_irg_pinned(irg) != op_pin_state_floats && "LoadStore optimization needs pinned graph"); - /* we need landing pads */ - remove_critical_cf_edges(irg); - - edges_assure(irg); - - /* for Phi optimization post-dominators are needed ... */ - assure_postdoms(irg); - if (get_opt_alias_analysis()) { - assure_irg_entity_usage_computed(irg); assure_irp_globals_entity_usage_computed(); } @@ -2270,21 +2115,15 @@ int optimize_load_store(ir_graph *irg) obstack_free(&env.obst, NULL); - /* Handle graph state */ - if (env.changes) { - set_irg_outs_inconsistent(irg); - set_irg_entity_usage_state(irg, ir_entity_usage_not_computed); - } - - if (env.changes & CF_CHANGED) { - /* is this really needed: Yes, control flow changed, block might - have Bad() predecessors. */ - set_irg_doms_inconsistent(irg); - } - return env.changes != 0; -} /* optimize_load_store */ + confirm_irg_properties(irg, + env.changes + ? env.changes & CF_CHANGED + ? IR_GRAPH_PROPERTIES_NONE + : IR_GRAPH_PROPERTIES_CONTROL_FLOW + : IR_GRAPH_PROPERTIES_ALL); +} ir_graph_pass_t *optimize_load_store_pass(const char *name) { - return def_graph_pass_ret(name ? name : "ldst", optimize_load_store); + return def_graph_pass(name ? name : "ldst", optimize_load_store); } /* optimize_load_store_pass */