X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fbe%2Fbeabi.c;h=a71e41a20c23f2313962a92af044d445eaf68f4f;hb=0e4318adc38a54110c1b1f7f1d5edc0ee2c78170;hp=97b7cec2339255ff83c414efd9f452b2808c6d29;hpb=ad8c4178f3acac69679bd413300e23c2a907dd71;p=libfirm diff --git a/ir/be/beabi.c b/ir/be/beabi.c index 97b7cec23..a71e41a20 100644 --- a/ir/be/beabi.c +++ b/ir/be/beabi.c @@ -118,6 +118,32 @@ static void be_abi_reg_map_set(pmap *map, const arch_register_t* reg, pmap_insert(map, reg, node); } +/** + * Check if the given register is callee save, ie. will be saved by the callee. + */ +static bool arch_register_is_callee_save( + const arch_env_t *arch_env, + const arch_register_t *reg) +{ + if (arch_env->impl->register_saved_by) + return arch_env->impl->register_saved_by(reg, /*callee=*/1); + return false; +} + +/** + * Check if the given register is caller save, ie. must be saved by the caller. + */ +static bool arch_register_is_caller_save( + const arch_env_t *arch_env, + const arch_register_t *reg) +{ + if (arch_env->impl->register_saved_by) + return arch_env->impl->register_saved_by(reg, /*callee=*/0); + return false; +} + + + /* _ ____ ___ ____ _ _ _ _ / \ | __ )_ _| / ___|__ _| | | |__ __ _ ___| | _____ @@ -416,12 +442,8 @@ static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp) ir_node **in = ALLOCAN(ir_node*, n_stack_params+1); unsigned n_in = 0; - /* - * Reverse list of stack parameters if call arguments are from left to right. - * We must them reverse again if they are pushed (not stored) and the stack - * direction is downwards. - */ - if (call->flags.bits.left_to_right ^ do_seq) { + /* push params in reverse direction because stack grows downwards */ + if (do_seq) { for (i = 0; i < n_stack_params >> 1; ++i) { int other = n_stack_params - i - 1; int tmp = stack_param_idx[i]; @@ -585,8 +607,8 @@ static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp) /* add state registers ins */ for (s = 0; s < ARR_LEN(states); ++s) { const arch_register_t *reg = states[s]; - const arch_register_class_t *cls = arch_register_get_class(reg); - ir_node *regnode = new_r_Unknown(irg, arch_register_class_mode(cls)); + const arch_register_class_t *cls = reg->reg_class; + ir_node *regnode = new_r_Unknown(irg, cls->mode); in[n_ins++] = regnode; } assert(n_ins == (int) (n_reg_params + ARR_LEN(states))); @@ -736,7 +758,7 @@ static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp) keep = be_new_Keep(bl, n, in); for (i = 0; i < n; ++i) { const arch_register_t *reg = (const arch_register_t*)get_irn_link(in[i]); - be_node_set_reg_class_in(keep, i, reg->reg_class); + be_node_set_reg_class_in(keep, i, arch_register_get_class(reg)); } } @@ -926,11 +948,11 @@ static ir_node *adjust_free(be_abi_irg_t *env, ir_node *free, ir_node *curr_sp) if (type != firm_unknown_type && get_type_size_bytes(type) != 1) { ir_tarval *tv = new_tarval_from_long(get_type_size_bytes(type), mode_Iu); ir_node *cnst = new_rd_Const(dbg, irg, tv); - ir_node *mul = new_rd_Mul(dbg, block, get_Free_size(free), + ir_node *mul = new_rd_Mul(dbg, block, get_Free_count(free), cnst, mode_Iu); size = mul; } else { - size = get_Free_size(free); + size = get_Free_count(free); } stack_alignment = 1 << arch_env->stack_alignment; @@ -1133,61 +1155,86 @@ static void process_calls(ir_graph *irg) * Changes a possibly allocated value param type by moving * entities to the stack layout type. * - * @param env the ABI environment * @param call the current call ABI * @param method_type the method type - * @param val_param_tp the value parameter type, will be destroyed - * @param param_map an array mapping method arguments to the stack layout type + * @param param_map an array mapping method arguments to the stack layout + * type * * @return the stack argument layout type */ -static ir_type *compute_arg_type(be_abi_irg_t *env, ir_graph *irg, - be_abi_call_t *call, - ir_type *method_type, ir_type *val_param_tp, - ir_entity ***param_map) +static ir_type *compute_arg_type(ir_graph *irg, be_abi_call_t *call, + ir_type *method_type, ir_entity ***param_map) { - int dir = env->call->flags.bits.left_to_right ? 1 : -1; - int inc = -dir; - int n = get_method_n_params(method_type); - int curr = inc > 0 ? 0 : n - 1; struct obstack *obst = be_get_be_obst(irg); - int ofs = 0; + ir_type *frame_type = get_irg_frame_type(irg); + size_t n_params = get_method_n_params(method_type); + size_t n_frame_members = get_compound_n_members(frame_type); + ir_entity *va_start_entity = NULL; + size_t f; + int ofs = 0; - char buf[128]; ir_type *res; - int i; - ident *id = get_entity_ident(get_irg_entity(irg)); + size_t i; ir_entity **map; - *param_map = map = OALLOCN(obst, ir_entity*, n); - res = new_type_struct(id_mangle_u(id, new_id_from_chars("arg_type", 8))); - for (i = 0; i < n; ++i, curr += inc) { - ir_type *param_type = get_method_param_type(method_type, curr); - be_abi_call_arg_t *arg = get_call_arg(call, 0, curr, 1); + *param_map = map = OALLOCNZ(obst, ir_entity*, n_params); + res = new_type_struct(new_id_from_chars("arg_type", 8)); - map[i] = NULL; - if (arg->on_stack) { - if (val_param_tp != NULL) { - /* the entity was already created, create a copy in the param type */ - ir_entity *val_ent = get_method_value_param_ent(method_type, i); - arg->stack_ent = copy_entity_own(val_ent, res); - set_entity_link(val_ent, arg->stack_ent); - set_entity_link(arg->stack_ent, NULL); - } else { - /* create a new entity */ - snprintf(buf, sizeof(buf), "param_%d", i); - arg->stack_ent = new_entity(res, new_id_from_str(buf), param_type); - } - ofs += arg->space_before; - ofs = round_up2(ofs, arg->alignment); - set_entity_offset(arg->stack_ent, ofs); - ofs += arg->space_after; - ofs += get_type_size_bytes(param_type); - map[i] = arg->stack_ent; + /* collect existing entities for value_param_types */ + for (f = n_frame_members; f > 0; ) { + ir_entity *entity = get_compound_member(frame_type, --f); + size_t num; + + set_entity_link(entity, NULL); + if (!is_parameter_entity(entity)) + continue; + num = get_entity_parameter_number(entity); + if (num == IR_VA_START_PARAMETER_NUMBER) { + /* move entity to new arg_type */ + set_entity_owner(entity, res); + va_start_entity = entity; + continue; + } + assert(num < n_params); + if (map[num] != NULL) + panic("multiple entities for parameter %u in %+F found", f, irg); + + if (num != n_params && !get_call_arg(call, 0, num, 1)->on_stack) { + /* don't move this entity */ + continue; + } + + map[num] = entity; + /* move entity to new arg_type */ + set_entity_owner(entity, res); + } + + for (i = 0; i < n_params; ++i) { + be_abi_call_arg_t *arg = get_call_arg(call, 0, i, 1); + ir_type *param_type = get_method_param_type(method_type, i); + ir_entity *entity; + + if (!arg->on_stack) { + continue; + } + entity = map[i]; + if (entity == NULL) { + /* create a new entity */ + entity = new_parameter_entity(res, i, param_type); } + ofs += arg->space_before; + ofs = round_up2(ofs, arg->alignment); + set_entity_offset(entity, ofs); + ofs += arg->space_after; + ofs += get_type_size_bytes(param_type); + arg->stack_ent = entity; + } + if (va_start_entity != NULL) { + set_entity_offset(va_start_entity, ofs); } set_type_size_bytes(res, ofs); set_type_state(res, layout_fixed); + return res; } @@ -1339,57 +1386,14 @@ static ir_node *create_be_return(be_abi_irg_t *env, ir_node *irn, ir_node *bl, return ret; } -typedef struct ent_pos_pair ent_pos_pair; -struct ent_pos_pair { - ir_entity *ent; /**< a value param entity */ - int pos; /**< its parameter number */ - ent_pos_pair *next; /**< for linking */ -}; - typedef struct lower_frame_sels_env_t { - ent_pos_pair *value_param_list; /**< the list of all value param entities */ ir_node *frame; /**< the current frame */ const arch_register_class_t *sp_class; /**< register class of the stack pointer */ const arch_register_class_t *link_class; /**< register class of the link pointer */ - ir_type *value_tp; /**< the value type if any */ ir_type *frame_tp; /**< the frame type */ int static_link_pos; /**< argument number of the hidden static link */ } lower_frame_sels_env_t; -/** - * Return an entity from the backend for an value param entity. - * - * @param ent an value param type entity - * @param ctx context - */ -static ir_entity *get_argument_entity(ir_entity *ent, lower_frame_sels_env_t *ctx) -{ - ir_entity *argument_ent = (ir_entity*)get_entity_link(ent); - - if (argument_ent == NULL) { - /* we have NO argument entity yet: This is bad, as we will - * need one for backing store. - * Create one here. - */ - ir_type *frame_tp = ctx->frame_tp; - unsigned offset = get_type_size_bytes(frame_tp); - ir_type *tp = get_entity_type(ent); - unsigned align = get_type_alignment_bytes(tp); - - offset += align - 1; - offset &= ~(align - 1); - - argument_ent = copy_entity_own(ent, frame_tp); - - /* must be automatic to set a fixed layout */ - set_entity_offset(argument_ent, offset); - offset += get_type_size_bytes(tp); - - set_type_size_bytes(frame_tp, offset); - set_entity_link(ent, argument_ent); - } - return argument_ent; -} /** * Walker: Replaces Sels of frame type and * value param type entities by FrameAddress. @@ -1406,147 +1410,13 @@ static void lower_frame_sels_walker(ir_node *irn, void *data) ir_entity *ent = get_Sel_entity(irn); ir_node *bl = get_nodes_block(irn); ir_node *nw; - int pos = 0; - int is_value_param = 0; - - if (get_entity_owner(ent) == ctx->value_tp) { - is_value_param = 1; - - /* replace by its copy from the argument type */ - pos = get_struct_member_index(ctx->value_tp, ent); - ent = get_argument_entity(ent, ctx); - } nw = be_new_FrameAddr(ctx->sp_class, bl, ctx->frame, ent); exchange(irn, nw); - - /* check, if it's a param Sel and if have not seen this entity before */ - if (is_value_param && get_entity_link(ent) == NULL) { - ent_pos_pair pair; - - pair.ent = ent; - pair.pos = pos; - pair.next = NULL; - ARR_APP1(ent_pos_pair, ctx->value_param_list, pair); - /* just a mark */ - set_entity_link(ent, ctx->value_param_list); - } } } } -/** - * Check if a value parameter is transmitted as a register. - * This might happen if the address of an parameter is taken which is - * transmitted in registers. - * - * Note that on some architectures this case must be handled specially - * because the place of the backing store is determined by their ABI. - * - * In the default case we move the entity to the frame type and create - * a backing store into the first block. - */ -static void fix_address_of_parameter_access(be_abi_irg_t *env, ir_graph *irg, - ent_pos_pair *value_param_list) -{ - be_abi_call_t *call = env->call; - const arch_env_t *arch_env = be_get_irg_arch_env(irg); - ent_pos_pair *entry, *new_list; - ir_type *frame_tp; - int i, n = ARR_LEN(value_param_list); - - new_list = NULL; - for (i = 0; i < n; ++i) { - int pos = value_param_list[i].pos; - be_abi_call_arg_t *arg = get_call_arg(call, 0, pos, 1); - - if (arg->in_reg) { - DBG((dbg, LEVEL_2, "\targ #%d need backing store\n", pos)); - value_param_list[i].next = new_list; - new_list = &value_param_list[i]; - } - } - if (new_list != NULL) { - /* ok, change the graph */ - ir_node *start_bl = get_irg_start_block(irg); - ir_node *first_bl = get_first_block_succ(start_bl); - ir_node *frame, *imem, *nmem, *store, *mem, *args; - optimization_state_t state; - unsigned offset; - - assert(first_bl && first_bl != start_bl); - /* we had already removed critical edges, so the following - assertion should be always true. */ - assert(get_Block_n_cfgpreds(first_bl) == 1); - - /* now create backing stores */ - frame = get_irg_frame(irg); - imem = get_irg_initial_mem(irg); - - save_optimization_state(&state); - set_optimize(0); - nmem = new_r_Proj(get_irg_start(irg), mode_M, pn_Start_M); - restore_optimization_state(&state); - - /* reroute all edges to the new memory source */ - edges_reroute(imem, nmem); - - store = NULL; - mem = imem; - args = get_irg_args(irg); - for (entry = new_list; entry != NULL; entry = entry->next) { - int i = entry->pos; - ir_type *tp = get_entity_type(entry->ent); - ir_mode *mode = get_type_mode(tp); - ir_node *addr; - - /* address for the backing store */ - addr = be_new_FrameAddr(arch_env->sp->reg_class, first_bl, frame, entry->ent); - - if (store) - mem = new_r_Proj(store, mode_M, pn_Store_M); - - /* the backing store itself */ - store = new_r_Store(first_bl, mem, addr, - new_r_Proj(args, mode, i), cons_none); - } - /* the new memory Proj gets the last Proj from store */ - set_Proj_pred(nmem, store); - set_Proj_proj(nmem, pn_Store_M); - set_nodes_block(nmem, get_nodes_block(store)); - - /* move all entities to the frame type */ - frame_tp = get_irg_frame_type(irg); - offset = get_type_size_bytes(frame_tp); - - /* we will add new entities: set the layout to undefined */ - assert(get_type_state(frame_tp) == layout_fixed); - set_type_state(frame_tp, layout_undefined); - for (entry = new_list; entry != NULL; entry = entry->next) { - ir_entity *ent = entry->ent; - - /* If the entity is still on the argument type, move it to the - * frame type. - * This happens if the value_param type was build due to compound - * params. */ - if (get_entity_owner(ent) != frame_tp) { - ir_type *tp = get_entity_type(ent); - unsigned align = get_type_alignment_bytes(tp); - - offset += align - 1; - offset &= ~(align - 1); - set_entity_owner(ent, frame_tp); - /* must be automatic to set a fixed layout */ - set_entity_offset(ent, offset); - offset += get_type_size_bytes(tp); - } - } - set_type_size_bytes(frame_tp, offset); - /* fix the layout again */ - set_type_state(frame_tp, layout_fixed); - } -} - /** * The start block has no jump, instead it has an initial exec Proj. * The backend wants to handle all blocks the same way, so we replace @@ -1578,75 +1448,6 @@ static void fix_start_block(ir_graph *irg) } } -/** - * Update the entity of Sels to the outer value parameters. - */ -static void update_outer_frame_sels(ir_node *irn, void *env) -{ - lower_frame_sels_env_t *ctx = (lower_frame_sels_env_t*)env; - ir_node *ptr; - ir_entity *ent; - int pos = 0; - - if (! is_Sel(irn)) - return; - ptr = get_Sel_ptr(irn); - if (! is_arg_Proj(ptr)) - return; - if (get_Proj_proj(ptr) != ctx->static_link_pos) - return; - ent = get_Sel_entity(irn); - - if (get_entity_owner(ent) == ctx->value_tp) { - /* replace by its copy from the argument type */ - pos = get_struct_member_index(ctx->value_tp, ent); - ent = get_argument_entity(ent, ctx); - set_Sel_entity(irn, ent); - - /* check, if we have not seen this entity before */ - if (get_entity_link(ent) == NULL) { - ent_pos_pair pair; - - pair.ent = ent; - pair.pos = pos; - pair.next = NULL; - ARR_APP1(ent_pos_pair, ctx->value_param_list, pair); - /* just a mark */ - set_entity_link(ent, ctx->value_param_list); - } - } -} - -/** - * Fix access to outer local variables. - */ -static void fix_outer_variable_access(be_abi_irg_t *env, - lower_frame_sels_env_t *ctx) -{ - int i; - ir_graph *irg; - (void) env; - - for (i = get_class_n_members(ctx->frame_tp) - 1; i >= 0; --i) { - ir_entity *ent = get_class_member(ctx->frame_tp, i); - - if (! is_method_entity(ent)) - continue; - - irg = get_entity_irg(ent); - if (irg == NULL) - continue; - - /* - * FIXME: find the number of the static link parameter - * for now we assume 0 here - */ - ctx->static_link_pos = 0; - - irg_walk_graph(irg, NULL, update_outer_frame_sels, ctx); - } -} - /** * Modify the irg itself and the frame type. */ @@ -1677,7 +1478,7 @@ static void modify_irg(ir_graph *irg) ir_node **args; ir_node *arg_tuple; const ir_edge_t *edge; - ir_type *arg_type, *bet_type, *tp; + ir_type *arg_type, *bet_type; lower_frame_sels_env_t ctx; ir_entity **param_map; @@ -1685,25 +1486,11 @@ static void modify_irg(ir_graph *irg) old_mem = get_irg_initial_mem(irg); - irp_reserve_resources(irp, IR_RESOURCE_ENTITY_LINK); - - /* set the links of all frame entities to NULL, we use it - to detect if an entity is already linked in the value_param_list */ - tp = get_method_value_param_type(method_type); - ctx.value_tp = tp; - if (tp != NULL) { - /* clear the links of the clone type, let the - original entities point to its clones */ - for (i = get_struct_n_members(tp) - 1; i >= 0; --i) { - ir_entity *mem = get_struct_member(tp, i); - set_entity_link(mem, NULL); - } - } + irp_reserve_resources(irp, IRP_RESOURCE_ENTITY_LINK); - arg_type = compute_arg_type(env, irg, call, method_type, tp, ¶m_map); + arg_type = compute_arg_type(irg, call, method_type, ¶m_map); /* Convert the Sel nodes in the irg to frame addr nodes: */ - ctx.value_param_list = NEW_ARR_F(ent_pos_pair, 0); ctx.frame = get_irg_frame(irg); ctx.sp_class = arch_env->sp->reg_class; ctx.link_class = arch_env->link_class; @@ -1714,14 +1501,6 @@ static void modify_irg(ir_graph *irg) default_layout_compound_type(ctx.frame_tp); } - /* we will possible add new entities to the frame: set the layout to undefined */ - assert(get_type_state(ctx.frame_tp) == layout_fixed); - set_type_state(ctx.frame_tp, layout_undefined); - - irg_walk_graph(irg, lower_frame_sels_walker, NULL, &ctx); - - /* fix the frame type layout again */ - set_type_state(ctx.frame_tp, layout_fixed); /* align stackframe to 4 byte */ frame_size = get_type_size_bytes(ctx.frame_tp); if (frame_size % 4 != 0) { @@ -1733,25 +1512,11 @@ static void modify_irg(ir_graph *irg) n_params = get_method_n_params(method_type); args = OALLOCNZ(obst, ir_node*, n_params); - /* - * for inner function we must now fix access to outer frame entities. - */ - fix_outer_variable_access(env, &ctx); + be_add_parameter_entity_stores(irg); - /* Check if a value parameter is transmitted as a register. - * This might happen if the address of an parameter is taken which is - * transmitted in registers. - * - * Note that on some architectures this case must be handled specially - * because the place of the backing store is determined by their ABI. - * - * In the default case we move the entity to the frame type and create - * a backing store into the first block. - */ - fix_address_of_parameter_access(env, irg, ctx.value_param_list); + irg_walk_graph(irg, lower_frame_sels_walker, NULL, &ctx); - DEL_ARR_F(ctx.value_param_list); - irp_free_resources(irp, IR_RESOURCE_ENTITY_LINK); + irp_free_resources(irp, IRP_RESOURCE_ENTITY_LINK); /* Fill the argument vector */ arg_tuple = get_irg_args(irg); @@ -1838,7 +1603,7 @@ static void modify_irg(ir_graph *irg) /* create a new initial memory proj */ assert(is_Proj(old_mem)); - arch_set_out_register_req(env->start, 0, arch_no_register_req); + arch_set_irn_register_req_out(env->start, 0, arch_no_register_req); new_mem_proj = new_r_Proj(env->start, mode_M, 0); mem = new_mem_proj; set_irg_initial_mem(irg, mem);