static void build_field (segment_info *h, tree union_type, record_layout_info rli) { tree field; tree name; HOST_WIDE_INT offset = h->offset; unsigned HOST_WIDE_INT desired_align, known_align; name = get_identifier (h->sym->name); field = build_decl (h->sym->declared_at.lb->location, FIELD_DECL, name, h->field); known_align = (offset & -offset) * BITS_PER_UNIT; if (known_align == 0 || known_align > BIGGEST_ALIGNMENT) known_align = BIGGEST_ALIGNMENT; desired_align = update_alignment_for_field (rli, field, known_align); if (desired_align > known_align) DECL_PACKED (field) = 1; DECL_FIELD_CONTEXT (field) = union_type; DECL_FIELD_OFFSET (field) = size_int (offset); DECL_FIELD_BIT_OFFSET (field) = bitsize_zero_node; SET_DECL_OFFSET_ALIGN (field, known_align); rli->offset = size_binop (MAX_EXPR, rli->offset, size_binop (PLUS_EXPR, DECL_FIELD_OFFSET (field), DECL_SIZE_UNIT (field))); /* If this field is assigned to a label, we create another two variables. One will hold the address of target label or format label. The other will hold the length of format label string. */ if (h->sym->attr.assign) { tree len; tree addr; gfc_allocate_lang_decl (field); GFC_DECL_ASSIGN (field) = 1; len = gfc_create_var_np (gfc_charlen_type_node,h->sym->name); addr = gfc_create_var_np (pvoid_type_node, h->sym->name); TREE_STATIC (len) = 1; TREE_STATIC (addr) = 1; DECL_INITIAL (len) = build_int_cst (NULL_TREE, -2); gfc_set_decl_location (len, &h->sym->declared_at); gfc_set_decl_location (addr, &h->sym->declared_at); GFC_DECL_STRING_LEN (field) = pushdecl_top_level (len); GFC_DECL_ASSIGN_ADDR (field) = pushdecl_top_level (addr); } /* If this field is volatile, mark it. */ if (h->sym->attr.volatile_) { tree new_type; TREE_THIS_VOLATILE (field) = 1; new_type = build_qualified_type (TREE_TYPE (field), TYPE_QUAL_VOLATILE); TREE_TYPE (field) = new_type; } h->field = field; }
static tree build_equiv_decl (tree union_type, bool is_init) { tree decl; if (is_init) { decl = gfc_create_var (union_type, "equiv"); TREE_STATIC (decl) = 1; return decl; } decl = build_decl (VAR_DECL, NULL, union_type); DECL_ARTIFICIAL (decl) = 1; DECL_COMMON (decl) = 1; TREE_ADDRESSABLE (decl) = 1; TREE_USED (decl) = 1; /* The source location has been lost, and doesn't really matter. We need to set it to something though. */ gfc_set_decl_location (decl, &gfc_current_locus); gfc_add_decl_to_function (decl); return decl; }
static void build_field (segment_info *h, tree union_type, record_layout_info rli) { tree field; tree name; HOST_WIDE_INT offset = h->offset; unsigned HOST_WIDE_INT desired_align, known_align; name = get_identifier (h->sym->name); field = build_decl (FIELD_DECL, name, h->field); gfc_set_decl_location (field, &h->sym->declared_at); known_align = (offset & -offset) * BITS_PER_UNIT; if (known_align == 0 || known_align > BIGGEST_ALIGNMENT) known_align = BIGGEST_ALIGNMENT; desired_align = update_alignment_for_field (rli, field, known_align); if (desired_align > known_align) DECL_PACKED (field) = 1; DECL_FIELD_CONTEXT (field) = union_type; DECL_FIELD_OFFSET (field) = size_int (offset); DECL_FIELD_BIT_OFFSET (field) = bitsize_zero_node; SET_DECL_OFFSET_ALIGN (field, known_align); rli->offset = size_binop (MAX_EXPR, rli->offset, size_binop (PLUS_EXPR, DECL_FIELD_OFFSET (field), DECL_SIZE_UNIT (field))); h->field = field; }
static tree build_equiv_decl (tree union_type, bool is_init) { tree decl; char name[15]; static int serial = 0; if (is_init) { decl = gfc_create_var (union_type, "equiv"); TREE_STATIC (decl) = 1; return decl; } snprintf (name, sizeof (name), "equiv.%d", serial++); decl = build_decl (VAR_DECL, get_identifier (name), union_type); DECL_ARTIFICIAL (decl) = 1; DECL_IGNORED_P (decl) = 1; if (!gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl))) TREE_STATIC (decl) = 1; TREE_ADDRESSABLE (decl) = 1; TREE_USED (decl) = 1; /* The source location has been lost, and doesn't really matter. We need to set it to something though. */ gfc_set_decl_location (decl, &gfc_current_locus); gfc_add_decl_to_function (decl); return decl; }
static tree build_common_decl (gfc_common_head *com, tree union_type, bool is_init) { gfc_symbol *common_sym; tree decl; /* Create a namespace to store symbols for common blocks. */ if (gfc_common_ns == NULL) gfc_common_ns = gfc_get_namespace (NULL, 0); gfc_get_symbol (com->name, gfc_common_ns, &common_sym); decl = common_sym->backend_decl; /* Update the size of this common block as needed. */ if (decl != NULL_TREE) { tree size = TYPE_SIZE_UNIT (union_type); /* Named common blocks of the same name shall be of the same size in all scoping units of a program in which they appear, but blank common blocks may be of different sizes. */ if (!tree_int_cst_equal (DECL_SIZE_UNIT (decl), size) && strcmp (com->name, BLANK_COMMON_NAME)) gfc_warning ("Named COMMON block '%s' at %L shall be of the " "same size as elsewhere (%lu vs %lu bytes)", com->name, &com->where, (unsigned long) TREE_INT_CST_LOW (size), (unsigned long) TREE_INT_CST_LOW (DECL_SIZE_UNIT (decl))); if (tree_int_cst_lt (DECL_SIZE_UNIT (decl), size)) { DECL_SIZE (decl) = TYPE_SIZE (union_type); DECL_SIZE_UNIT (decl) = size; DECL_MODE (decl) = TYPE_MODE (union_type); TREE_TYPE (decl) = union_type; layout_decl (decl, 0); } } /* If this common block has been declared in a previous program unit, and either it is already initialized or there is no new initialization for it, just return. */ if ((decl != NULL_TREE) && (!is_init || DECL_INITIAL (decl))) return decl; /* If there is no backend_decl for the common block, build it. */ if (decl == NULL_TREE) { decl = build_decl (input_location, VAR_DECL, get_identifier (com->name), union_type); gfc_set_decl_assembler_name (decl, gfc_sym_mangled_common_id (com)); TREE_PUBLIC (decl) = 1; TREE_STATIC (decl) = 1; DECL_IGNORED_P (decl) = 1; if (!com->is_bind_c) DECL_ALIGN (decl) = BIGGEST_ALIGNMENT; else { /* Do not set the alignment for bind(c) common blocks to BIGGEST_ALIGNMENT because that won't match what C does. Also, for common blocks with one element, the alignment must be that of the field within the common block in order to match what C will do. */ tree field = NULL_TREE; field = TYPE_FIELDS (TREE_TYPE (decl)); if (DECL_CHAIN (field) == NULL_TREE) DECL_ALIGN (decl) = TYPE_ALIGN (TREE_TYPE (field)); } DECL_USER_ALIGN (decl) = 0; GFC_DECL_COMMON_OR_EQUIV (decl) = 1; gfc_set_decl_location (decl, &com->where); if (com->threadprivate) DECL_TLS_MODEL (decl) = decl_default_tls_model (decl); /* Place the back end declaration for this common block in GLOBAL_BINDING_LEVEL. */ common_sym->backend_decl = pushdecl_top_level (decl); } /* Has no initial values. */ if (!is_init) { DECL_INITIAL (decl) = NULL_TREE; DECL_COMMON (decl) = 1; DECL_DEFER_OUTPUT (decl) = 1; } else { DECL_INITIAL (decl) = error_mark_node; DECL_COMMON (decl) = 0; DECL_DEFER_OUTPUT (decl) = 0; } return decl; }
static tree build_common_decl (gfc_common_head *com, tree union_type, bool is_init) { gfc_symbol *common_sym; tree decl; /* Create a namespace to store symbols for common blocks. */ if (gfc_common_ns == NULL) gfc_common_ns = gfc_get_namespace (NULL); gfc_get_symbol (com->name, gfc_common_ns, &common_sym); decl = common_sym->backend_decl; /* Update the size of this common block as needed. */ if (decl != NULL_TREE) { tree size = TYPE_SIZE_UNIT (union_type); if (tree_int_cst_lt (DECL_SIZE_UNIT (decl), size)) { /* Named common blocks of the same name shall be of the same size in all scoping units of a program in which they appear, but blank common blocks may be of different sizes. */ if (strcmp (com->name, BLANK_COMMON_NAME)) gfc_warning ("Named COMMON block '%s' at %L shall be of the " "same size", com->name, &com->where); DECL_SIZE_UNIT (decl) = size; } } /* If this common block has been declared in a previous program unit, and either it is already initialized or there is no new initialization for it, just return. */ if ((decl != NULL_TREE) && (!is_init || DECL_INITIAL (decl))) return decl; /* If there is no backend_decl for the common block, build it. */ if (decl == NULL_TREE) { decl = build_decl (VAR_DECL, get_identifier (com->name), union_type); SET_DECL_ASSEMBLER_NAME (decl, gfc_sym_mangled_common_id (com->name)); TREE_PUBLIC (decl) = 1; TREE_STATIC (decl) = 1; DECL_ALIGN (decl) = BIGGEST_ALIGNMENT; DECL_USER_ALIGN (decl) = 0; gfc_set_decl_location (decl, &com->where); /* Place the back end declaration for this common block in GLOBAL_BINDING_LEVEL. */ common_sym->backend_decl = pushdecl_top_level (decl); } /* Has no initial values. */ if (!is_init) { DECL_INITIAL (decl) = NULL_TREE; DECL_COMMON (decl) = 1; DECL_DEFER_OUTPUT (decl) = 1; } else { DECL_INITIAL (decl) = error_mark_node; DECL_COMMON (decl) = 0; DECL_DEFER_OUTPUT (decl) = 0; } return decl; }