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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [fortran/] [trans-decl.c] - Rev 774
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/* Backend function setup Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. Contributed by Paul Brook This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ /* trans-decl.c -- Handling of backend function and variable decls, etc */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "tree.h" #include "tree-dump.h" #include "gimple.h" /* For create_tmp_var_raw. */ #include "ggc.h" #include "diagnostic-core.h" /* For internal_error. */ #include "toplev.h" /* For announce_function. */ #include "output.h" /* For decl_default_tls_model. */ #include "target.h" #include "function.h" #include "flags.h" #include "cgraph.h" #include "debug.h" #include "gfortran.h" #include "pointer-set.h" #include "constructor.h" #include "trans.h" #include "trans-types.h" #include "trans-array.h" #include "trans-const.h" /* Only for gfc_trans_code. Shouldn't need to include this. */ #include "trans-stmt.h" #define MAX_LABEL_VALUE 99999 /* Holds the result of the function if no result variable specified. */ static GTY(()) tree current_fake_result_decl; static GTY(()) tree parent_fake_result_decl; /* Holds the variable DECLs for the current function. */ static GTY(()) tree saved_function_decls; static GTY(()) tree saved_parent_function_decls; static struct pointer_set_t *nonlocal_dummy_decl_pset; static GTY(()) tree nonlocal_dummy_decls; /* Holds the variable DECLs that are locals. */ static GTY(()) tree saved_local_decls; /* The namespace of the module we're currently generating. Only used while outputting decls for module variables. Do not rely on this being set. */ static gfc_namespace *module_namespace; /* The currently processed procedure symbol. */ static gfc_symbol* current_procedure_symbol = NULL; /* With -fcoarray=lib: For generating the registering call of static coarrays. */ static bool has_coarray_vars; static stmtblock_t caf_init_block; /* List of static constructor functions. */ tree gfc_static_ctors; /* Function declarations for builtin library functions. */ tree gfor_fndecl_pause_numeric; tree gfor_fndecl_pause_string; tree gfor_fndecl_stop_numeric; tree gfor_fndecl_stop_numeric_f08; tree gfor_fndecl_stop_string; tree gfor_fndecl_error_stop_numeric; tree gfor_fndecl_error_stop_string; tree gfor_fndecl_runtime_error; tree gfor_fndecl_runtime_error_at; tree gfor_fndecl_runtime_warning_at; tree gfor_fndecl_os_error; tree gfor_fndecl_generate_error; tree gfor_fndecl_set_args; tree gfor_fndecl_set_fpe; tree gfor_fndecl_set_options; tree gfor_fndecl_set_convert; tree gfor_fndecl_set_record_marker; tree gfor_fndecl_set_max_subrecord_length; tree gfor_fndecl_ctime; tree gfor_fndecl_fdate; tree gfor_fndecl_ttynam; tree gfor_fndecl_in_pack; tree gfor_fndecl_in_unpack; tree gfor_fndecl_associated; /* Coarray run-time library function decls. */ tree gfor_fndecl_caf_init; tree gfor_fndecl_caf_finalize; tree gfor_fndecl_caf_register; tree gfor_fndecl_caf_deregister; tree gfor_fndecl_caf_critical; tree gfor_fndecl_caf_end_critical; tree gfor_fndecl_caf_sync_all; tree gfor_fndecl_caf_sync_images; tree gfor_fndecl_caf_error_stop; tree gfor_fndecl_caf_error_stop_str; /* Coarray global variables for num_images/this_image. */ tree gfort_gvar_caf_num_images; tree gfort_gvar_caf_this_image; /* Math functions. Many other math functions are handled in trans-intrinsic.c. */ gfc_powdecl_list gfor_fndecl_math_powi[4][3]; tree gfor_fndecl_math_ishftc4; tree gfor_fndecl_math_ishftc8; tree gfor_fndecl_math_ishftc16; /* String functions. */ tree gfor_fndecl_compare_string; tree gfor_fndecl_concat_string; tree gfor_fndecl_string_len_trim; tree gfor_fndecl_string_index; tree gfor_fndecl_string_scan; tree gfor_fndecl_string_verify; tree gfor_fndecl_string_trim; tree gfor_fndecl_string_minmax; tree gfor_fndecl_adjustl; tree gfor_fndecl_adjustr; tree gfor_fndecl_select_string; tree gfor_fndecl_compare_string_char4; tree gfor_fndecl_concat_string_char4; tree gfor_fndecl_string_len_trim_char4; tree gfor_fndecl_string_index_char4; tree gfor_fndecl_string_scan_char4; tree gfor_fndecl_string_verify_char4; tree gfor_fndecl_string_trim_char4; tree gfor_fndecl_string_minmax_char4; tree gfor_fndecl_adjustl_char4; tree gfor_fndecl_adjustr_char4; tree gfor_fndecl_select_string_char4; /* Conversion between character kinds. */ tree gfor_fndecl_convert_char1_to_char4; tree gfor_fndecl_convert_char4_to_char1; /* Other misc. runtime library functions. */ tree gfor_fndecl_size0; tree gfor_fndecl_size1; tree gfor_fndecl_iargc; /* Intrinsic functions implemented in Fortran. */ tree gfor_fndecl_sc_kind; tree gfor_fndecl_si_kind; tree gfor_fndecl_sr_kind; /* BLAS gemm functions. */ tree gfor_fndecl_sgemm; tree gfor_fndecl_dgemm; tree gfor_fndecl_cgemm; tree gfor_fndecl_zgemm; static void gfc_add_decl_to_parent_function (tree decl) { gcc_assert (decl); DECL_CONTEXT (decl) = DECL_CONTEXT (current_function_decl); DECL_NONLOCAL (decl) = 1; DECL_CHAIN (decl) = saved_parent_function_decls; saved_parent_function_decls = decl; } void gfc_add_decl_to_function (tree decl) { gcc_assert (decl); TREE_USED (decl) = 1; DECL_CONTEXT (decl) = current_function_decl; DECL_CHAIN (decl) = saved_function_decls; saved_function_decls = decl; } static void add_decl_as_local (tree decl) { gcc_assert (decl); TREE_USED (decl) = 1; DECL_CONTEXT (decl) = current_function_decl; DECL_CHAIN (decl) = saved_local_decls; saved_local_decls = decl; } /* Build a backend label declaration. Set TREE_USED for named labels. The context of the label is always the current_function_decl. All labels are marked artificial. */ tree gfc_build_label_decl (tree label_id) { /* 2^32 temporaries should be enough. */ static unsigned int tmp_num = 1; tree label_decl; char *label_name; if (label_id == NULL_TREE) { /* Build an internal label name. */ ASM_FORMAT_PRIVATE_NAME (label_name, "L", tmp_num++); label_id = get_identifier (label_name); } else label_name = NULL; /* Build the LABEL_DECL node. Labels have no type. */ label_decl = build_decl (input_location, LABEL_DECL, label_id, void_type_node); DECL_CONTEXT (label_decl) = current_function_decl; DECL_MODE (label_decl) = VOIDmode; /* We always define the label as used, even if the original source file never references the label. We don't want all kinds of spurious warnings for old-style Fortran code with too many labels. */ TREE_USED (label_decl) = 1; DECL_ARTIFICIAL (label_decl) = 1; return label_decl; } /* Set the backend source location of a decl. */ void gfc_set_decl_location (tree decl, locus * loc) { DECL_SOURCE_LOCATION (decl) = loc->lb->location; } /* Return the backend label declaration for a given label structure, or create it if it doesn't exist yet. */ tree gfc_get_label_decl (gfc_st_label * lp) { if (lp->backend_decl) return lp->backend_decl; else { char label_name[GFC_MAX_SYMBOL_LEN + 1]; tree label_decl; /* Validate the label declaration from the front end. */ gcc_assert (lp != NULL && lp->value <= MAX_LABEL_VALUE); /* Build a mangled name for the label. */ sprintf (label_name, "__label_%.6d", lp->value); /* Build the LABEL_DECL node. */ label_decl = gfc_build_label_decl (get_identifier (label_name)); /* Tell the debugger where the label came from. */ if (lp->value <= MAX_LABEL_VALUE) /* An internal label. */ gfc_set_decl_location (label_decl, &lp->where); else DECL_ARTIFICIAL (label_decl) = 1; /* Store the label in the label list and return the LABEL_DECL. */ lp->backend_decl = label_decl; return label_decl; } } /* Convert a gfc_symbol to an identifier of the same name. */ static tree gfc_sym_identifier (gfc_symbol * sym) { if (sym->attr.is_main_program && strcmp (sym->name, "main") == 0) return (get_identifier ("MAIN__")); else return (get_identifier (sym->name)); } /* Construct mangled name from symbol name. */ static tree gfc_sym_mangled_identifier (gfc_symbol * sym) { char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; /* Prevent the mangling of identifiers that have an assigned binding label (mainly those that are bind(c)). */ if (sym->attr.is_bind_c == 1 && sym->binding_label) return get_identifier (sym->binding_label); if (sym->module == NULL) return gfc_sym_identifier (sym); else { snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name); return get_identifier (name); } } /* Construct mangled function name from symbol name. */ static tree gfc_sym_mangled_function_id (gfc_symbol * sym) { int has_underscore; char name[GFC_MAX_MANGLED_SYMBOL_LEN + 1]; /* It may be possible to simply use the binding label if it's provided, and remove the other checks. Then we could use it for other things if we wished. */ if ((sym->attr.is_bind_c == 1 || sym->attr.is_iso_c == 1) && sym->binding_label) /* use the binding label rather than the mangled name */ return get_identifier (sym->binding_label); if (sym->module == NULL || sym->attr.proc == PROC_EXTERNAL || (sym->module != NULL && (sym->attr.external || sym->attr.if_source == IFSRC_IFBODY))) { /* Main program is mangled into MAIN__. */ if (sym->attr.is_main_program) return get_identifier ("MAIN__"); /* Intrinsic procedures are never mangled. */ if (sym->attr.proc == PROC_INTRINSIC) return get_identifier (sym->name); if (gfc_option.flag_underscoring) { has_underscore = strchr (sym->name, '_') != 0; if (gfc_option.flag_second_underscore && has_underscore) snprintf (name, sizeof name, "%s__", sym->name); else snprintf (name, sizeof name, "%s_", sym->name); return get_identifier (name); } else return get_identifier (sym->name); } else { snprintf (name, sizeof name, "__%s_MOD_%s", sym->module, sym->name); return get_identifier (name); } } void gfc_set_decl_assembler_name (tree decl, tree name) { tree target_mangled = targetm.mangle_decl_assembler_name (decl, name); SET_DECL_ASSEMBLER_NAME (decl, target_mangled); } /* Returns true if a variable of specified size should go on the stack. */ int gfc_can_put_var_on_stack (tree size) { unsigned HOST_WIDE_INT low; if (!INTEGER_CST_P (size)) return 0; if (gfc_option.flag_max_stack_var_size < 0) return 1; if (TREE_INT_CST_HIGH (size) != 0) return 0; low = TREE_INT_CST_LOW (size); if (low > (unsigned HOST_WIDE_INT) gfc_option.flag_max_stack_var_size) return 0; /* TODO: Set a per-function stack size limit. */ return 1; } /* gfc_finish_cray_pointee sets DECL_VALUE_EXPR for a Cray pointee to an expression involving its corresponding pointer. There are 2 cases; one for variable size arrays, and one for everything else, because variable-sized arrays require one fewer level of indirection. */ static void gfc_finish_cray_pointee (tree decl, gfc_symbol *sym) { tree ptr_decl = gfc_get_symbol_decl (sym->cp_pointer); tree value; /* Parameters need to be dereferenced. */ if (sym->cp_pointer->attr.dummy) ptr_decl = build_fold_indirect_ref_loc (input_location, ptr_decl); /* Check to see if we're dealing with a variable-sized array. */ if (sym->attr.dimension && TREE_CODE (TREE_TYPE (decl)) == POINTER_TYPE) { /* These decls will be dereferenced later, so we don't dereference them here. */ value = convert (TREE_TYPE (decl), ptr_decl); } else { ptr_decl = convert (build_pointer_type (TREE_TYPE (decl)), ptr_decl); value = build_fold_indirect_ref_loc (input_location, ptr_decl); } SET_DECL_VALUE_EXPR (decl, value); DECL_HAS_VALUE_EXPR_P (decl) = 1; GFC_DECL_CRAY_POINTEE (decl) = 1; /* This is a fake variable just for debugging purposes. */ TREE_ASM_WRITTEN (decl) = 1; } /* Finish processing of a declaration without an initial value. */ static void gfc_finish_decl (tree decl) { gcc_assert (TREE_CODE (decl) == PARM_DECL || DECL_INITIAL (decl) == NULL_TREE); if (TREE_CODE (decl) != VAR_DECL) return; if (DECL_SIZE (decl) == NULL_TREE && TYPE_SIZE (TREE_TYPE (decl)) != NULL_TREE) layout_decl (decl, 0); /* A few consistency checks. */ /* A static variable with an incomplete type is an error if it is initialized. Also if it is not file scope. Otherwise, let it through, but if it is not `extern' then it may cause an error message later. */ /* An automatic variable with an incomplete type is an error. */ /* We should know the storage size. */ gcc_assert (DECL_SIZE (decl) != NULL_TREE || (TREE_STATIC (decl) ? (!DECL_INITIAL (decl) || !DECL_CONTEXT (decl)) : DECL_EXTERNAL (decl))); /* The storage size should be constant. */ gcc_assert ((!DECL_EXTERNAL (decl) && !TREE_STATIC (decl)) || !DECL_SIZE (decl) || TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST); } /* Apply symbol attributes to a variable, and add it to the function scope. */ static void gfc_finish_var_decl (tree decl, gfc_symbol * sym) { tree new_type; /* TREE_ADDRESSABLE means the address of this variable is actually needed. This is the equivalent of the TARGET variables. We also need to set this if the variable is passed by reference in a CALL statement. */ /* Set DECL_VALUE_EXPR for Cray Pointees. */ if (sym->attr.cray_pointee) gfc_finish_cray_pointee (decl, sym); if (sym->attr.target) TREE_ADDRESSABLE (decl) = 1; /* If it wasn't used we wouldn't be getting it. */ TREE_USED (decl) = 1; if (sym->attr.flavor == FL_PARAMETER && (sym->attr.dimension || sym->ts.type == BT_DERIVED)) TREE_READONLY (decl) = 1; /* Chain this decl to the pending declarations. Don't do pushdecl() because this would add them to the current scope rather than the function scope. */ if (current_function_decl != NULL_TREE) { if (sym->ns->proc_name->backend_decl == current_function_decl || sym->result == sym) gfc_add_decl_to_function (decl); else if (sym->ns->proc_name->attr.flavor == FL_LABEL) /* This is a BLOCK construct. */ add_decl_as_local (decl); else gfc_add_decl_to_parent_function (decl); } if (sym->attr.cray_pointee) return; if(sym->attr.is_bind_c == 1) { /* We need to put variables that are bind(c) into the common segment of the object file, because this is what C would do. gfortran would typically put them in either the BSS or initialized data segments, and only mark them as common if they were part of common blocks. However, if they are not put into common space, then C cannot initialize global Fortran variables that it interoperates with and the draft says that either Fortran or C should be able to initialize it (but not both, of course.) (J3/04-007, section 15.3). */ TREE_PUBLIC(decl) = 1; DECL_COMMON(decl) = 1; } /* If a variable is USE associated, it's always external. */ if (sym->attr.use_assoc) { DECL_EXTERNAL (decl) = 1; TREE_PUBLIC (decl) = 1; } else if (sym->module && !sym->attr.result && !sym->attr.dummy) { /* TODO: Don't set sym->module for result or dummy variables. */ gcc_assert (current_function_decl == NULL_TREE || sym->result == sym); /* This is the declaration of a module variable. */ TREE_PUBLIC (decl) = 1; TREE_STATIC (decl) = 1; } /* Derived types are a bit peculiar because of the possibility of a default initializer; this must be applied each time the variable comes into scope it therefore need not be static. These variables are SAVE_NONE but have an initializer. Otherwise explicitly initialized variables are SAVE_IMPLICIT and explicitly saved are SAVE_EXPLICIT. */ if (!sym->attr.use_assoc && (sym->attr.save != SAVE_NONE || sym->attr.data || (sym->value && sym->ns->proc_name->attr.is_main_program) || (gfc_option.coarray == GFC_FCOARRAY_LIB && sym->attr.codimension && !sym->attr.allocatable))) TREE_STATIC (decl) = 1; if (sym->attr.volatile_) { TREE_THIS_VOLATILE (decl) = 1; TREE_SIDE_EFFECTS (decl) = 1; new_type = build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE); TREE_TYPE (decl) = new_type; } /* Keep variables larger than max-stack-var-size off stack. */ if (!sym->ns->proc_name->attr.recursive && INTEGER_CST_P (DECL_SIZE_UNIT (decl)) && !gfc_can_put_var_on_stack (DECL_SIZE_UNIT (decl)) /* Put variable length auto array pointers always into stack. */ && (TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE || sym->attr.dimension == 0 || sym->as->type != AS_EXPLICIT || sym->attr.pointer || sym->attr.allocatable) && !DECL_ARTIFICIAL (decl)) TREE_STATIC (decl) = 1; /* Handle threadprivate variables. */ if (sym->attr.threadprivate && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) DECL_TLS_MODEL (decl) = decl_default_tls_model (decl); if (!sym->attr.target && !sym->attr.pointer && !sym->attr.cray_pointee && !sym->attr.proc_pointer) DECL_RESTRICTED_P (decl) = 1; } /* Allocate the lang-specific part of a decl. */ void gfc_allocate_lang_decl (tree decl) { DECL_LANG_SPECIFIC (decl) = ggc_alloc_cleared_lang_decl(sizeof (struct lang_decl)); } /* Remember a symbol to generate initialization/cleanup code at function entry/exit. */ static void gfc_defer_symbol_init (gfc_symbol * sym) { gfc_symbol *p; gfc_symbol *last; gfc_symbol *head; /* Don't add a symbol twice. */ if (sym->tlink) return; last = head = sym->ns->proc_name; p = last->tlink; /* Make sure that setup code for dummy variables which are used in the setup of other variables is generated first. */ if (sym->attr.dummy) { /* Find the first dummy arg seen after us, or the first non-dummy arg. This is a circular list, so don't go past the head. */ while (p != head && (!p->attr.dummy || p->dummy_order > sym->dummy_order)) { last = p; p = p->tlink; } } /* Insert in between last and p. */ last->tlink = sym; sym->tlink = p; } /* Used in gfc_get_symbol_decl and gfc_get_derived_type to obtain the backend_decl for a module symbol, if it all ready exists. If the module gsymbol does not exist, it is created. If the symbol does not exist, it is added to the gsymbol namespace. Returns true if an existing backend_decl is found. */ bool gfc_get_module_backend_decl (gfc_symbol *sym) { gfc_gsymbol *gsym; gfc_symbol *s; gfc_symtree *st; gsym = gfc_find_gsymbol (gfc_gsym_root, sym->module); if (!gsym || (gsym->ns && gsym->type == GSYM_MODULE)) { st = NULL; s = NULL; if (gsym) gfc_find_symbol (sym->name, gsym->ns, 0, &s); if (!s) { if (!gsym) { gsym = gfc_get_gsymbol (sym->module); gsym->type = GSYM_MODULE; gsym->ns = gfc_get_namespace (NULL, 0); } st = gfc_new_symtree (&gsym->ns->sym_root, sym->name); st->n.sym = sym; sym->refs++; } else if (sym->attr.flavor == FL_DERIVED) { if (s && s->attr.flavor == FL_PROCEDURE) { gfc_interface *intr; gcc_assert (s->attr.generic); for (intr = s->generic; intr; intr = intr->next) if (intr->sym->attr.flavor == FL_DERIVED) { s = intr->sym; break; } } if (!s->backend_decl) s->backend_decl = gfc_get_derived_type (s); gfc_copy_dt_decls_ifequal (s, sym, true); return true; } else if (s->backend_decl) { if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived, true); else if (sym->ts.type == BT_CHARACTER) sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl; sym->backend_decl = s->backend_decl; return true; } } return false; } /* Create an array index type variable with function scope. */ static tree create_index_var (const char * pfx, int nest) { tree decl; decl = gfc_create_var_np (gfc_array_index_type, pfx); if (nest) gfc_add_decl_to_parent_function (decl); else gfc_add_decl_to_function (decl); return decl; } /* Create variables to hold all the non-constant bits of info for a descriptorless array. Remember these in the lang-specific part of the type. */ static void gfc_build_qualified_array (tree decl, gfc_symbol * sym) { tree type; int dim; int nest; gfc_namespace* procns; type = TREE_TYPE (decl); /* We just use the descriptor, if there is one. */ if (GFC_DESCRIPTOR_TYPE_P (type)) return; gcc_assert (GFC_ARRAY_TYPE_P (type)); procns = gfc_find_proc_namespace (sym->ns); nest = (procns->proc_name->backend_decl != current_function_decl) && !sym->attr.contained; if (sym->attr.codimension && gfc_option.coarray == GFC_FCOARRAY_LIB && sym->as->type != AS_ASSUMED_SHAPE && GFC_TYPE_ARRAY_CAF_TOKEN (type) == NULL_TREE) { tree token; token = gfc_create_var_np (build_qualified_type (pvoid_type_node, TYPE_QUAL_RESTRICT), "caf_token"); GFC_TYPE_ARRAY_CAF_TOKEN (type) = token; DECL_ARTIFICIAL (token) = 1; TREE_STATIC (token) = 1; gfc_add_decl_to_function (token); } for (dim = 0; dim < GFC_TYPE_ARRAY_RANK (type); dim++) { if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) { GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); TREE_NO_WARNING (GFC_TYPE_ARRAY_LBOUND (type, dim)) = 1; } /* Don't try to use the unknown bound for assumed shape arrays. */ if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE && (sym->as->type != AS_ASSUMED_SIZE || dim < GFC_TYPE_ARRAY_RANK (type) - 1)) { GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); TREE_NO_WARNING (GFC_TYPE_ARRAY_UBOUND (type, dim)) = 1; } if (GFC_TYPE_ARRAY_STRIDE (type, dim) == NULL_TREE) { GFC_TYPE_ARRAY_STRIDE (type, dim) = create_index_var ("stride", nest); TREE_NO_WARNING (GFC_TYPE_ARRAY_STRIDE (type, dim)) = 1; } } for (dim = GFC_TYPE_ARRAY_RANK (type); dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type); dim++) { if (GFC_TYPE_ARRAY_LBOUND (type, dim) == NULL_TREE) { GFC_TYPE_ARRAY_LBOUND (type, dim) = create_index_var ("lbound", nest); TREE_NO_WARNING (GFC_TYPE_ARRAY_LBOUND (type, dim)) = 1; } /* Don't try to use the unknown ubound for the last coarray dimension. */ if (GFC_TYPE_ARRAY_UBOUND (type, dim) == NULL_TREE && dim < GFC_TYPE_ARRAY_RANK (type) + GFC_TYPE_ARRAY_CORANK (type) - 1) { GFC_TYPE_ARRAY_UBOUND (type, dim) = create_index_var ("ubound", nest); TREE_NO_WARNING (GFC_TYPE_ARRAY_UBOUND (type, dim)) = 1; } } if (GFC_TYPE_ARRAY_OFFSET (type) == NULL_TREE) { GFC_TYPE_ARRAY_OFFSET (type) = gfc_create_var_np (gfc_array_index_type, "offset"); TREE_NO_WARNING (GFC_TYPE_ARRAY_OFFSET (type)) = 1; if (nest) gfc_add_decl_to_parent_function (GFC_TYPE_ARRAY_OFFSET (type)); else gfc_add_decl_to_function (GFC_TYPE_ARRAY_OFFSET (type)); } if (GFC_TYPE_ARRAY_SIZE (type) == NULL_TREE && sym->as->type != AS_ASSUMED_SIZE) { GFC_TYPE_ARRAY_SIZE (type) = create_index_var ("size", nest); TREE_NO_WARNING (GFC_TYPE_ARRAY_SIZE (type)) = 1; } if (POINTER_TYPE_P (type)) { gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (type))); gcc_assert (TYPE_LANG_SPECIFIC (type) == TYPE_LANG_SPECIFIC (TREE_TYPE (type))); type = TREE_TYPE (type); } if (! COMPLETE_TYPE_P (type) && GFC_TYPE_ARRAY_SIZE (type)) { tree size, range; size = fold_build2_loc (input_location, MINUS_EXPR, gfc_array_index_type, GFC_TYPE_ARRAY_SIZE (type), gfc_index_one_node); range = build_range_type (gfc_array_index_type, gfc_index_zero_node, size); TYPE_DOMAIN (type) = range; layout_type (type); } if (TYPE_NAME (type) != NULL_TREE && GFC_TYPE_ARRAY_UBOUND (type, sym->as->rank - 1) != NULL_TREE && TREE_CODE (GFC_TYPE_ARRAY_UBOUND (type, sym->as->rank - 1)) == VAR_DECL) { tree gtype = DECL_ORIGINAL_TYPE (TYPE_NAME (type)); for (dim = 0; dim < sym->as->rank - 1; dim++) { gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE); gtype = TREE_TYPE (gtype); } gcc_assert (TREE_CODE (gtype) == ARRAY_TYPE); if (TYPE_MAX_VALUE (TYPE_DOMAIN (gtype)) == NULL) TYPE_NAME (type) = NULL_TREE; } if (TYPE_NAME (type) == NULL_TREE) { tree gtype = TREE_TYPE (type), rtype, type_decl; for (dim = sym->as->rank - 1; dim >= 0; dim--) { tree lbound, ubound; lbound = GFC_TYPE_ARRAY_LBOUND (type, dim); ubound = GFC_TYPE_ARRAY_UBOUND (type, dim); rtype = build_range_type (gfc_array_index_type, lbound, ubound); gtype = build_array_type (gtype, rtype); /* Ensure the bound variables aren't optimized out at -O0. For -O1 and above they often will be optimized out, but can be tracked by VTA. Also set DECL_NAMELESS, so that the artificial lbound.N or ubound.N DECL_NAME doesn't end up in debug info. */ if (lbound && TREE_CODE (lbound) == VAR_DECL && DECL_ARTIFICIAL (lbound) && DECL_IGNORED_P (lbound)) { if (DECL_NAME (lbound) && strstr (IDENTIFIER_POINTER (DECL_NAME (lbound)), "lbound") != 0) DECL_NAMELESS (lbound) = 1; DECL_IGNORED_P (lbound) = 0; } if (ubound && TREE_CODE (ubound) == VAR_DECL && DECL_ARTIFICIAL (ubound) && DECL_IGNORED_P (ubound)) { if (DECL_NAME (ubound) && strstr (IDENTIFIER_POINTER (DECL_NAME (ubound)), "ubound") != 0) DECL_NAMELESS (ubound) = 1; DECL_IGNORED_P (ubound) = 0; } } TYPE_NAME (type) = type_decl = build_decl (input_location, TYPE_DECL, NULL, gtype); DECL_ORIGINAL_TYPE (type_decl) = gtype; } } /* For some dummy arguments we don't use the actual argument directly. Instead we create a local decl and use that. This allows us to perform initialization, and construct full type information. */ static tree gfc_build_dummy_array_decl (gfc_symbol * sym, tree dummy) { tree decl; tree type; gfc_array_spec *as; char *name; gfc_packed packed; int n; bool known_size; if (sym->attr.pointer || sym->attr.allocatable) return dummy; /* Add to list of variables if not a fake result variable. */ if (sym->attr.result || sym->attr.dummy) gfc_defer_symbol_init (sym); type = TREE_TYPE (dummy); gcc_assert (TREE_CODE (dummy) == PARM_DECL && POINTER_TYPE_P (type)); /* Do we know the element size? */ known_size = sym->ts.type != BT_CHARACTER || INTEGER_CST_P (sym->ts.u.cl->backend_decl); if (known_size && !GFC_DESCRIPTOR_TYPE_P (TREE_TYPE (type))) { /* For descriptorless arrays with known element size the actual argument is sufficient. */ gcc_assert (GFC_ARRAY_TYPE_P (type)); gfc_build_qualified_array (dummy, sym); return dummy; } type = TREE_TYPE (type); if (GFC_DESCRIPTOR_TYPE_P (type)) { /* Create a descriptorless array pointer. */ as = sym->as; packed = PACKED_NO; /* Even when -frepack-arrays is used, symbols with TARGET attribute are not repacked. */ if (!gfc_option.flag_repack_arrays || sym->attr.target) { if (as->type == AS_ASSUMED_SIZE) packed = PACKED_FULL; } else { if (as->type == AS_EXPLICIT) { packed = PACKED_FULL; for (n = 0; n < as->rank; n++) { if (!(as->upper[n] && as->lower[n] && as->upper[n]->expr_type == EXPR_CONSTANT && as->lower[n]->expr_type == EXPR_CONSTANT)) packed = PACKED_PARTIAL; } } else packed = PACKED_PARTIAL; } type = gfc_typenode_for_spec (&sym->ts); type = gfc_get_nodesc_array_type (type, sym->as, packed, !sym->attr.target); } else { /* We now have an expression for the element size, so create a fully qualified type. Reset sym->backend decl or this will just return the old type. */ DECL_ARTIFICIAL (sym->backend_decl) = 1; sym->backend_decl = NULL_TREE; type = gfc_sym_type (sym); packed = PACKED_FULL; } ASM_FORMAT_PRIVATE_NAME (name, IDENTIFIER_POINTER (DECL_NAME (dummy)), 0); decl = build_decl (input_location, VAR_DECL, get_identifier (name), type); DECL_ARTIFICIAL (decl) = 1; DECL_NAMELESS (decl) = 1; TREE_PUBLIC (decl) = 0; TREE_STATIC (decl) = 0; DECL_EXTERNAL (decl) = 0; /* We should never get deferred shape arrays here. We used to because of frontend bugs. */ gcc_assert (sym->as->type != AS_DEFERRED); if (packed == PACKED_PARTIAL) GFC_DECL_PARTIAL_PACKED_ARRAY (decl) = 1; else if (packed == PACKED_FULL) GFC_DECL_PACKED_ARRAY (decl) = 1; gfc_build_qualified_array (decl, sym); if (DECL_LANG_SPECIFIC (dummy)) DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (dummy); else gfc_allocate_lang_decl (decl); GFC_DECL_SAVED_DESCRIPTOR (decl) = dummy; if (sym->ns->proc_name->backend_decl == current_function_decl || sym->attr.contained) gfc_add_decl_to_function (decl); else gfc_add_decl_to_parent_function (decl); return decl; } /* For symbol SYM with GFC_DECL_SAVED_DESCRIPTOR used in contained function add a VAR_DECL to the current function with DECL_VALUE_EXPR pointing to the artificial variable for debug info purposes. */ static void gfc_nonlocal_dummy_array_decl (gfc_symbol *sym) { tree decl, dummy; if (! nonlocal_dummy_decl_pset) nonlocal_dummy_decl_pset = pointer_set_create (); if (pointer_set_insert (nonlocal_dummy_decl_pset, sym->backend_decl)) return; dummy = GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl); decl = build_decl (input_location, VAR_DECL, DECL_NAME (dummy), TREE_TYPE (sym->backend_decl)); DECL_ARTIFICIAL (decl) = 0; TREE_USED (decl) = 1; TREE_PUBLIC (decl) = 0; TREE_STATIC (decl) = 0; DECL_EXTERNAL (decl) = 0; if (DECL_BY_REFERENCE (dummy)) DECL_BY_REFERENCE (decl) = 1; DECL_LANG_SPECIFIC (decl) = DECL_LANG_SPECIFIC (sym->backend_decl); SET_DECL_VALUE_EXPR (decl, sym->backend_decl); DECL_HAS_VALUE_EXPR_P (decl) = 1; DECL_CONTEXT (decl) = DECL_CONTEXT (sym->backend_decl); DECL_CHAIN (decl) = nonlocal_dummy_decls; nonlocal_dummy_decls = decl; } /* Return a constant or a variable to use as a string length. Does not add the decl to the current scope. */ static tree gfc_create_string_length (gfc_symbol * sym) { gcc_assert (sym->ts.u.cl); gfc_conv_const_charlen (sym->ts.u.cl); if (sym->ts.u.cl->backend_decl == NULL_TREE) { tree length; char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; /* Also prefix the mangled name. */ strcpy (&name[1], sym->name); name[0] = '.'; length = build_decl (input_location, VAR_DECL, get_identifier (name), gfc_charlen_type_node); DECL_ARTIFICIAL (length) = 1; TREE_USED (length) = 1; if (sym->ns->proc_name->tlink != NULL) gfc_defer_symbol_init (sym); sym->ts.u.cl->backend_decl = length; } gcc_assert (sym->ts.u.cl->backend_decl != NULL_TREE); return sym->ts.u.cl->backend_decl; } /* If a variable is assigned a label, we add another two auxiliary variables. */ static void gfc_add_assign_aux_vars (gfc_symbol * sym) { tree addr; tree length; tree decl; gcc_assert (sym->backend_decl); decl = sym->backend_decl; gfc_allocate_lang_decl (decl); GFC_DECL_ASSIGN (decl) = 1; length = build_decl (input_location, VAR_DECL, create_tmp_var_name (sym->name), gfc_charlen_type_node); addr = build_decl (input_location, VAR_DECL, create_tmp_var_name (sym->name), pvoid_type_node); gfc_finish_var_decl (length, sym); gfc_finish_var_decl (addr, sym); /* STRING_LENGTH is also used as flag. Less than -1 means that ASSIGN_ADDR can not be used. Equal -1 means that ASSIGN_ADDR is the target label's address. Otherwise, value is the length of a format string and ASSIGN_ADDR is its address. */ if (TREE_STATIC (length)) DECL_INITIAL (length) = build_int_cst (gfc_charlen_type_node, -2); else gfc_defer_symbol_init (sym); GFC_DECL_STRING_LEN (decl) = length; GFC_DECL_ASSIGN_ADDR (decl) = addr; } static tree add_attributes_to_decl (symbol_attribute sym_attr, tree list) { unsigned id; tree attr; for (id = 0; id < EXT_ATTR_NUM; id++) if (sym_attr.ext_attr & (1 << id)) { attr = build_tree_list ( get_identifier (ext_attr_list[id].middle_end_name), NULL_TREE); list = chainon (list, attr); } return list; } static void build_function_decl (gfc_symbol * sym, bool global); /* Return the decl for a gfc_symbol, create it if it doesn't already exist. */ tree gfc_get_symbol_decl (gfc_symbol * sym) { tree decl; tree length = NULL_TREE; tree attributes; int byref; bool intrinsic_array_parameter = false; gcc_assert (sym->attr.referenced || sym->attr.use_assoc || sym->ns->proc_name->attr.if_source == IFSRC_IFBODY || (sym->module && sym->attr.if_source != IFSRC_DECL && sym->backend_decl)); if (sym->ns && sym->ns->proc_name && sym->ns->proc_name->attr.function) byref = gfc_return_by_reference (sym->ns->proc_name); else byref = 0; /* Make sure that the vtab for the declared type is completed. */ if (sym->ts.type == BT_CLASS) { gfc_component *c = CLASS_DATA (sym); if (!c->ts.u.derived->backend_decl) { gfc_find_derived_vtab (c->ts.u.derived); gfc_get_derived_type (sym->ts.u.derived); } } /* All deferred character length procedures need to retain the backend decl, which is a pointer to the character length in the caller's namespace and to declare a local character length. */ if (!byref && sym->attr.function && sym->ts.type == BT_CHARACTER && sym->ts.deferred && sym->ts.u.cl->passed_length == NULL && sym->ts.u.cl->backend_decl && TREE_CODE (sym->ts.u.cl->backend_decl) == PARM_DECL) { sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl; sym->ts.u.cl->backend_decl = NULL_TREE; length = gfc_create_string_length (sym); } if ((sym->attr.dummy && ! sym->attr.function) || (sym->attr.result && byref)) { /* Return via extra parameter. */ if (sym->attr.result && byref && !sym->backend_decl) { sym->backend_decl = DECL_ARGUMENTS (sym->ns->proc_name->backend_decl); /* For entry master function skip over the __entry argument. */ if (sym->ns->proc_name->attr.entry_master) sym->backend_decl = DECL_CHAIN (sym->backend_decl); } /* Dummy variables should already have been created. */ gcc_assert (sym->backend_decl); /* Create a character length variable. */ if (sym->ts.type == BT_CHARACTER) { /* For a deferred dummy, make a new string length variable. */ if (sym->ts.deferred && (sym->ts.u.cl->passed_length == sym->ts.u.cl->backend_decl)) sym->ts.u.cl->backend_decl = NULL_TREE; if (sym->ts.deferred && sym->attr.result && sym->ts.u.cl->passed_length == NULL && sym->ts.u.cl->backend_decl) { sym->ts.u.cl->passed_length = sym->ts.u.cl->backend_decl; sym->ts.u.cl->backend_decl = NULL_TREE; } if (sym->ts.u.cl->backend_decl == NULL_TREE) length = gfc_create_string_length (sym); else length = sym->ts.u.cl->backend_decl; if (TREE_CODE (length) == VAR_DECL && DECL_FILE_SCOPE_P (length)) { /* Add the string length to the same context as the symbol. */ if (DECL_CONTEXT (sym->backend_decl) == current_function_decl) gfc_add_decl_to_function (length); else gfc_add_decl_to_parent_function (length); gcc_assert (DECL_CONTEXT (sym->backend_decl) == DECL_CONTEXT (length)); gfc_defer_symbol_init (sym); } } /* Use a copy of the descriptor for dummy arrays. */ if ((sym->attr.dimension || sym->attr.codimension) && !TREE_USED (sym->backend_decl)) { decl = gfc_build_dummy_array_decl (sym, sym->backend_decl); /* Prevent the dummy from being detected as unused if it is copied. */ if (sym->backend_decl != NULL && decl != sym->backend_decl) DECL_ARTIFICIAL (sym->backend_decl) = 1; sym->backend_decl = decl; } TREE_USED (sym->backend_decl) = 1; if (sym->attr.assign && GFC_DECL_ASSIGN (sym->backend_decl) == 0) { gfc_add_assign_aux_vars (sym); } if (sym->attr.dimension && DECL_LANG_SPECIFIC (sym->backend_decl) && GFC_DECL_SAVED_DESCRIPTOR (sym->backend_decl) && DECL_CONTEXT (sym->backend_decl) != current_function_decl) gfc_nonlocal_dummy_array_decl (sym); if (sym->ts.type == BT_CLASS && sym->backend_decl) GFC_DECL_CLASS(sym->backend_decl) = 1; if (sym->ts.type == BT_CLASS && sym->backend_decl) GFC_DECL_CLASS(sym->backend_decl) = 1; return sym->backend_decl; } if (sym->backend_decl) return sym->backend_decl; /* Special case for array-valued named constants from intrinsic procedures; those are inlined. */ if (sym->attr.use_assoc && sym->from_intmod && sym->attr.flavor == FL_PARAMETER) intrinsic_array_parameter = true; /* If use associated and whole file compilation, use the module declaration. */ if (gfc_option.flag_whole_file && (sym->attr.flavor == FL_VARIABLE || sym->attr.flavor == FL_PARAMETER) && sym->attr.use_assoc && !intrinsic_array_parameter && sym->module && gfc_get_module_backend_decl (sym)) { if (sym->ts.type == BT_CLASS && sym->backend_decl) GFC_DECL_CLASS(sym->backend_decl) = 1; return sym->backend_decl; } if (sym->attr.flavor == FL_PROCEDURE) { /* Catch function declarations. Only used for actual parameters, procedure pointers and procptr initialization targets. */ if (sym->attr.external || sym->attr.use_assoc || sym->attr.intrinsic) { decl = gfc_get_extern_function_decl (sym); gfc_set_decl_location (decl, &sym->declared_at); } else { if (!sym->backend_decl) build_function_decl (sym, false); decl = sym->backend_decl; } return decl; } if (sym->attr.intrinsic) internal_error ("intrinsic variable which isn't a procedure"); /* Create string length decl first so that they can be used in the type declaration. */ if (sym->ts.type == BT_CHARACTER) length = gfc_create_string_length (sym); /* Create the decl for the variable. */ decl = build_decl (sym->declared_at.lb->location, VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym)); /* Add attributes to variables. Functions are handled elsewhere. */ attributes = add_attributes_to_decl (sym->attr, NULL_TREE); decl_attributes (&decl, attributes, 0); /* Symbols from modules should have their assembler names mangled. This is done here rather than in gfc_finish_var_decl because it is different for string length variables. */ if (sym->module) { gfc_set_decl_assembler_name (decl, gfc_sym_mangled_identifier (sym)); if (sym->attr.use_assoc && !intrinsic_array_parameter) DECL_IGNORED_P (decl) = 1; } if (sym->attr.dimension || sym->attr.codimension) { /* Create variables to hold the non-constant bits of array info. */ gfc_build_qualified_array (decl, sym); if (sym->attr.contiguous || ((sym->attr.allocatable || !sym->attr.dummy) && !sym->attr.pointer)) GFC_DECL_PACKED_ARRAY (decl) = 1; } /* Remember this variable for allocation/cleanup. */ if (sym->attr.dimension || sym->attr.allocatable || sym->attr.codimension || (sym->ts.type == BT_CLASS && (CLASS_DATA (sym)->attr.dimension || CLASS_DATA (sym)->attr.allocatable)) || (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.alloc_comp) /* This applies a derived type default initializer. */ || (sym->ts.type == BT_DERIVED && sym->attr.save == SAVE_NONE && !sym->attr.data && !sym->attr.allocatable && (sym->value && !sym->ns->proc_name->attr.is_main_program) && !(sym->attr.use_assoc && !intrinsic_array_parameter))) gfc_defer_symbol_init (sym); gfc_finish_var_decl (decl, sym); if (sym->ts.type == BT_CHARACTER) { /* Character variables need special handling. */ gfc_allocate_lang_decl (decl); if (TREE_CODE (length) != INTEGER_CST) { char name[GFC_MAX_MANGLED_SYMBOL_LEN + 2]; if (sym->module) { /* Also prefix the mangled name for symbols from modules. */ strcpy (&name[1], sym->name); name[0] = '.'; strcpy (&name[1], IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (length))); gfc_set_decl_assembler_name (decl, get_identifier (name)); } gfc_finish_var_decl (length, sym); gcc_assert (!sym->value); } } else if (sym->attr.subref_array_pointer) { /* We need the span for these beasts. */ gfc_allocate_lang_decl (decl); } if (sym->attr.subref_array_pointer) { tree span; GFC_DECL_SUBREF_ARRAY_P (decl) = 1; span = build_decl (input_location, VAR_DECL, create_tmp_var_name ("span"), gfc_array_index_type); gfc_finish_var_decl (span, sym); TREE_STATIC (span) = TREE_STATIC (decl); DECL_ARTIFICIAL (span) = 1; GFC_DECL_SPAN (decl) = span; GFC_TYPE_ARRAY_SPAN (TREE_TYPE (decl)) = span; } if (sym->ts.type == BT_CLASS) GFC_DECL_CLASS(decl) = 1; sym->backend_decl = decl; if (sym->attr.assign) gfc_add_assign_aux_vars (sym); if (intrinsic_array_parameter) { TREE_STATIC (decl) = 1; DECL_EXTERNAL (decl) = 0; } if (TREE_STATIC (decl) && !(sym->attr.use_assoc && !intrinsic_array_parameter) && (sym->attr.save || sym->ns->proc_name->attr.is_main_program || gfc_option.flag_max_stack_var_size == 0 || sym->attr.data || sym->ns->proc_name->attr.flavor == FL_MODULE) && (gfc_option.coarray != GFC_FCOARRAY_LIB || !sym->attr.codimension || sym->attr.allocatable)) { /* Add static initializer. For procedures, it is only needed if SAVE is specified otherwise they need to be reinitialized every time the procedure is entered. The TREE_STATIC is in this case due to -fmax-stack-var-size=. */ DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, TREE_TYPE (decl), sym->attr.dimension || (sym->attr.codimension && sym->attr.allocatable), sym->attr.pointer || sym->attr.allocatable, sym->attr.proc_pointer); } if (!TREE_STATIC (decl) && POINTER_TYPE_P (TREE_TYPE (decl)) && !sym->attr.pointer && !sym->attr.allocatable && !sym->attr.proc_pointer) DECL_BY_REFERENCE (decl) = 1; if (sym->attr.vtab || (sym->name[0] == '_' && strncmp ("__def_init", sym->name, 10) == 0)) { TREE_READONLY (decl) = 1; GFC_DECL_PUSH_TOPLEVEL (decl) = 1; } return decl; } /* Substitute a temporary variable in place of the real one. */ void gfc_shadow_sym (gfc_symbol * sym, tree decl, gfc_saved_var * save) { save->attr = sym->attr; save->decl = sym->backend_decl; gfc_clear_attr (&sym->attr); sym->attr.referenced = 1; sym->attr.flavor = FL_VARIABLE; sym->backend_decl = decl; } /* Restore the original variable. */ void gfc_restore_sym (gfc_symbol * sym, gfc_saved_var * save) { sym->attr = save->attr; sym->backend_decl = save->decl; } /* Declare a procedure pointer. */ static tree get_proc_pointer_decl (gfc_symbol *sym) { tree decl; tree attributes; decl = sym->backend_decl; if (decl) return decl; decl = build_decl (input_location, VAR_DECL, get_identifier (sym->name), build_pointer_type (gfc_get_function_type (sym))); if ((sym->ns->proc_name && sym->ns->proc_name->backend_decl == current_function_decl) || sym->attr.contained) gfc_add_decl_to_function (decl); else if (sym->ns->proc_name->attr.flavor != FL_MODULE) gfc_add_decl_to_parent_function (decl); sym->backend_decl = decl; /* If a variable is USE associated, it's always external. */ if (sym->attr.use_assoc) { DECL_EXTERNAL (decl) = 1; TREE_PUBLIC (decl) = 1; } else if (sym->module && sym->ns->proc_name->attr.flavor == FL_MODULE) { /* This is the declaration of a module variable. */ TREE_PUBLIC (decl) = 1; TREE_STATIC (decl) = 1; } if (!sym->attr.use_assoc && (sym->attr.save != SAVE_NONE || sym->attr.data || (sym->value && sym->ns->proc_name->attr.is_main_program))) TREE_STATIC (decl) = 1; if (TREE_STATIC (decl) && sym->value) { /* Add static initializer. */ DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, TREE_TYPE (decl), sym->attr.dimension, false, true); } /* Handle threadprivate procedure pointers. */ if (sym->attr.threadprivate && (TREE_STATIC (decl) || DECL_EXTERNAL (decl))) DECL_TLS_MODEL (decl) = decl_default_tls_model (decl); attributes = add_attributes_to_decl (sym->attr, NULL_TREE); decl_attributes (&decl, attributes, 0); return decl; } /* Get a basic decl for an external function. */ tree gfc_get_extern_function_decl (gfc_symbol * sym) { tree type; tree fndecl; tree attributes; gfc_expr e; gfc_intrinsic_sym *isym; gfc_expr argexpr; char s[GFC_MAX_SYMBOL_LEN + 23]; /* "_gfortran_f2c_specific" and '\0'. */ tree name; tree mangled_name; gfc_gsymbol *gsym; if (sym->backend_decl) return sym->backend_decl; /* We should never be creating external decls for alternate entry points. The procedure may be an alternate entry point, but we don't want/need to know that. */ gcc_assert (!(sym->attr.entry || sym->attr.entry_master)); if (sym->attr.proc_pointer) return get_proc_pointer_decl (sym); /* See if this is an external procedure from the same file. If so, return the backend_decl. */ gsym = gfc_find_gsymbol (gfc_gsym_root, sym->name); if (gfc_option.flag_whole_file && (!sym->attr.use_assoc || sym->attr.if_source != IFSRC_DECL) && !sym->backend_decl && gsym && gsym->ns && ((gsym->type == GSYM_SUBROUTINE) || (gsym->type == GSYM_FUNCTION)) && (gsym->ns->proc_name->backend_decl || !sym->attr.intrinsic)) { if (!gsym->ns->proc_name->backend_decl) { /* By construction, the external function cannot be a contained procedure. */ locus old_loc; tree save_fn_decl = current_function_decl; current_function_decl = NULL_TREE; gfc_save_backend_locus (&old_loc); push_cfun (cfun); gfc_create_function_decl (gsym->ns, true); pop_cfun (); gfc_restore_backend_locus (&old_loc); current_function_decl = save_fn_decl; } /* If the namespace has entries, the proc_name is the entry master. Find the entry and use its backend_decl. otherwise, use the proc_name backend_decl. */ if (gsym->ns->entries) { gfc_entry_list *entry = gsym->ns->entries; for (; entry; entry = entry->next) { if (strcmp (gsym->name, entry->sym->name) == 0) { sym->backend_decl = entry->sym->backend_decl; break; } } } else sym->backend_decl = gsym->ns->proc_name->backend_decl; if (sym->backend_decl) { /* Avoid problems of double deallocation of the backend declaration later in gfc_trans_use_stmts; cf. PR 45087. */ if (sym->attr.if_source != IFSRC_DECL && sym->attr.use_assoc) sym->attr.use_assoc = 0; return sym->backend_decl; } } /* See if this is a module procedure from the same file. If so, return the backend_decl. */ if (sym->module) gsym = gfc_find_gsymbol (gfc_gsym_root, sym->module); if (gfc_option.flag_whole_file && gsym && gsym->ns && gsym->type == GSYM_MODULE) { gfc_symbol *s; s = NULL; gfc_find_symbol (sym->name, gsym->ns, 0, &s); if (s && s->backend_decl) { if (sym->ts.type == BT_DERIVED || sym->ts.type == BT_CLASS) gfc_copy_dt_decls_ifequal (s->ts.u.derived, sym->ts.u.derived, true); else if (sym->ts.type == BT_CHARACTER) sym->ts.u.cl->backend_decl = s->ts.u.cl->backend_decl; sym->backend_decl = s->backend_decl; return sym->backend_decl; } } if (sym->attr.intrinsic) { /* Call the resolution function to get the actual name. This is a nasty hack which relies on the resolution functions only looking at the first argument. We pass NULL for the second argument otherwise things like AINT get confused. */ isym = gfc_find_function (sym->name); gcc_assert (isym->resolve.f0 != NULL); memset (&e, 0, sizeof (e)); e.expr_type = EXPR_FUNCTION; memset (&argexpr, 0, sizeof (argexpr)); gcc_assert (isym->formal); argexpr.ts = isym->formal->ts; if (isym->formal->next == NULL) isym->resolve.f1 (&e, &argexpr); else { if (isym->formal->next->next == NULL) isym->resolve.f2 (&e, &argexpr, NULL); else { if (isym->formal->next->next->next == NULL) isym->resolve.f3 (&e, &argexpr, NULL, NULL); else { /* All specific intrinsics take less than 5 arguments. */ gcc_assert (isym->formal->next->next->next->next == NULL); isym->resolve.f4 (&e, &argexpr, NULL, NULL, NULL); } } } if (gfc_option.flag_f2c && ((e.ts.type == BT_REAL && e.ts.kind == gfc_default_real_kind) || e.ts.type == BT_COMPLEX)) { /* Specific which needs a different implementation if f2c calling conventions are used. */ sprintf (s, "_gfortran_f2c_specific%s", e.value.function.name); } else sprintf (s, "_gfortran_specific%s", e.value.function.name); name = get_identifier (s); mangled_name = name; } else { name = gfc_sym_identifier (sym); mangled_name = gfc_sym_mangled_function_id (sym); } type = gfc_get_function_type (sym); fndecl = build_decl (input_location, FUNCTION_DECL, name, type); /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes; TREE_PUBLIC specifies whether a function is globally addressable (i.e. the opposite of declaring a function as static in C). */ DECL_EXTERNAL (fndecl) = 1; TREE_PUBLIC (fndecl) = 1; attributes = add_attributes_to_decl (sym->attr, NULL_TREE); decl_attributes (&fndecl, attributes, 0); gfc_set_decl_assembler_name (fndecl, mangled_name); /* Set the context of this decl. */ if (0 && sym->ns && sym->ns->proc_name) { /* TODO: Add external decls to the appropriate scope. */ DECL_CONTEXT (fndecl) = sym->ns->proc_name->backend_decl; } else { /* Global declaration, e.g. intrinsic subroutine. */ DECL_CONTEXT (fndecl) = NULL_TREE; } /* Set attributes for PURE functions. A call to PURE function in the Fortran 95 sense is both pure and without side effects in the C sense. */ if (sym->attr.pure || sym->attr.elemental) { if (sym->attr.function && !gfc_return_by_reference (sym)) DECL_PURE_P (fndecl) = 1; /* TODO: check if pure SUBROUTINEs don't have INTENT(OUT) parameters and don't use alternate returns (is this allowed?). In that case, calls to them are meaningless, and can be optimized away. See also in build_function_decl(). */ TREE_SIDE_EFFECTS (fndecl) = 0; } /* Mark non-returning functions. */ if (sym->attr.noreturn) TREE_THIS_VOLATILE(fndecl) = 1; sym->backend_decl = fndecl; if (DECL_CONTEXT (fndecl) == NULL_TREE) pushdecl_top_level (fndecl); return fndecl; } /* Create a declaration for a procedure. For external functions (in the C sense) use gfc_get_extern_function_decl. HAS_ENTRIES is true if this is a master function with alternate entry points. */ static void build_function_decl (gfc_symbol * sym, bool global) { tree fndecl, type, attributes; symbol_attribute attr; tree result_decl; gfc_formal_arglist *f; gcc_assert (!sym->attr.external); if (sym->backend_decl) return; /* Set the line and filename. sym->declared_at seems to point to the last statement for subroutines, but it'll do for now. */ gfc_set_backend_locus (&sym->declared_at); /* Allow only one nesting level. Allow public declarations. */ gcc_assert (current_function_decl == NULL_TREE || DECL_FILE_SCOPE_P (current_function_decl) || (TREE_CODE (DECL_CONTEXT (current_function_decl)) == NAMESPACE_DECL)); type = gfc_get_function_type (sym); fndecl = build_decl (input_location, FUNCTION_DECL, gfc_sym_identifier (sym), type); attr = sym->attr; /* Initialize DECL_EXTERNAL and TREE_PUBLIC before calling decl_attributes; TREE_PUBLIC specifies whether a function is globally addressable (i.e. the opposite of declaring a function as static in C). */ DECL_EXTERNAL (fndecl) = 0; if (!current_function_decl && !sym->attr.entry_master && !sym->attr.is_main_program) TREE_PUBLIC (fndecl) = 1; attributes = add_attributes_to_decl (attr, NULL_TREE); decl_attributes (&fndecl, attributes, 0); /* Figure out the return type of the declared function, and build a RESULT_DECL for it. If this is a subroutine with alternate returns, build a RESULT_DECL for it. */ result_decl = NULL_TREE; /* TODO: Shouldn't this just be TREE_TYPE (TREE_TYPE (fndecl)). */ if (attr.function) { if (gfc_return_by_reference (sym)) type = void_type_node; else { if (sym->result != sym) result_decl = gfc_sym_identifier (sym->result); type = TREE_TYPE (TREE_TYPE (fndecl)); } } else { /* Look for alternate return placeholders. */ int has_alternate_returns = 0; for (f = sym->formal; f; f = f->next) { if (f->sym == NULL) { has_alternate_returns = 1; break; } } if (has_alternate_returns) type = integer_type_node; else type = void_type_node; } result_decl = build_decl (input_location, RESULT_DECL, result_decl, type); DECL_ARTIFICIAL (result_decl) = 1; DECL_IGNORED_P (result_decl) = 1; DECL_CONTEXT (result_decl) = fndecl; DECL_RESULT (fndecl) = result_decl; /* Don't call layout_decl for a RESULT_DECL. layout_decl (result_decl, 0); */ /* TREE_STATIC means the function body is defined here. */ TREE_STATIC (fndecl) = 1; /* Set attributes for PURE functions. A call to a PURE function in the Fortran 95 sense is both pure and without side effects in the C sense. */ if (attr.pure || attr.elemental) { /* TODO: check if a pure SUBROUTINE has no INTENT(OUT) arguments including an alternate return. In that case it can also be marked as PURE. See also in gfc_get_extern_function_decl(). */ if (attr.function && !gfc_return_by_reference (sym)) DECL_PURE_P (fndecl) = 1; TREE_SIDE_EFFECTS (fndecl) = 0; } /* Layout the function declaration and put it in the binding level of the current function. */ if (global || (sym->name[0] == '_' && strncmp ("__copy", sym->name, 6) == 0)) pushdecl_top_level (fndecl); else pushdecl (fndecl); /* Perform name mangling if this is a top level or module procedure. */ if (current_function_decl == NULL_TREE) gfc_set_decl_assembler_name (fndecl, gfc_sym_mangled_function_id (sym)); sym->backend_decl = fndecl; } /* Create the DECL_ARGUMENTS for a procedure. */ static void create_function_arglist (gfc_symbol * sym) { tree fndecl; gfc_formal_arglist *f; tree typelist, hidden_typelist; tree arglist, hidden_arglist; tree type; tree parm; fndecl = sym->backend_decl; /* Build formal argument list. Make sure that their TREE_CONTEXT is the new FUNCTION_DECL node. */ arglist = NULL_TREE; hidden_arglist = NULL_TREE; typelist = TYPE_ARG_TYPES (TREE_TYPE (fndecl)); if (sym->attr.entry_master) { type = TREE_VALUE (typelist); parm = build_decl (input_location, PARM_DECL, get_identifier ("__entry"), type); DECL_CONTEXT (parm) = fndecl; DECL_ARG_TYPE (parm) = type; TREE_READONLY (parm) = 1; gfc_finish_decl (parm); DECL_ARTIFICIAL (parm) = 1; arglist = chainon (arglist, parm); typelist = TREE_CHAIN (typelist); } if (gfc_return_by_reference (sym)) { tree type = TREE_VALUE (typelist), length = NULL; if (sym->ts.type == BT_CHARACTER) { /* Length of character result. */ tree len_type = TREE_VALUE (TREE_CHAIN (typelist)); length = build_decl (input_location, PARM_DECL, get_identifier (".__result"), len_type); if (!sym->ts.u.cl->length) { sym->ts.u.cl->backend_decl = length; TREE_USED (length) = 1; } gcc_assert (TREE_CODE (length) == PARM_DECL); DECL_CONTEXT (length) = fndecl; DECL_ARG_TYPE (length) = len_type; TREE_READONLY (length) = 1; DECL_ARTIFICIAL (length) = 1; gfc_finish_decl (length); if (sym->ts.u.cl->backend_decl == NULL || sym->ts.u.cl->backend_decl == length) { gfc_symbol *arg; tree backend_decl; if (sym->ts.u.cl->backend_decl == NULL) { tree len = build_decl (input_location, VAR_DECL, get_identifier ("..__result"), gfc_charlen_type_node); DECL_ARTIFICIAL (len) = 1; TREE_USED (len) = 1; sym->ts.u.cl->backend_decl = len; } /* Make sure PARM_DECL type doesn't point to incomplete type. */ arg = sym->result ? sym->result : sym; backend_decl = arg->backend_decl; /* Temporary clear it, so that gfc_sym_type creates complete type. */ arg->backend_decl = NULL; type = gfc_sym_type (arg); arg->backend_decl = backend_decl; type = build_reference_type (type); } } parm = build_decl (input_location, PARM_DECL, get_identifier ("__result"), type); DECL_CONTEXT (parm) = fndecl; DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); TREE_READONLY (parm) = 1; DECL_ARTIFICIAL (parm) = 1; gfc_finish_decl (parm); arglist = chainon (arglist, parm); typelist = TREE_CHAIN (typelist); if (sym->ts.type == BT_CHARACTER) { gfc_allocate_lang_decl (parm); arglist = chainon (arglist, length); typelist = TREE_CHAIN (typelist); } } hidden_typelist = typelist; for (f = sym->formal; f; f = f->next) if (f->sym != NULL) /* Ignore alternate returns. */ hidden_typelist = TREE_CHAIN (hidden_typelist); for (f = sym->formal; f; f = f->next) { char name[GFC_MAX_SYMBOL_LEN + 2]; /* Ignore alternate returns. */ if (f->sym == NULL) continue; type = TREE_VALUE (typelist); if (f->sym->ts.type == BT_CHARACTER && (!sym->attr.is_bind_c || sym->attr.entry_master)) { tree len_type = TREE_VALUE (hidden_typelist); tree length = NULL_TREE; if (!f->sym->ts.deferred) gcc_assert (len_type == gfc_charlen_type_node); else gcc_assert (POINTER_TYPE_P (len_type)); strcpy (&name[1], f->sym->name); name[0] = '_'; length = build_decl (input_location, PARM_DECL, get_identifier (name), len_type); hidden_arglist = chainon (hidden_arglist, length); DECL_CONTEXT (length) = fndecl; DECL_ARTIFICIAL (length) = 1; DECL_ARG_TYPE (length) = len_type; TREE_READONLY (length) = 1; gfc_finish_decl (length); /* Remember the passed value. */ if (f->sym->ts.u.cl->passed_length != NULL) { /* This can happen if the same type is used for multiple arguments. We need to copy cl as otherwise cl->passed_length gets overwritten. */ f->sym->ts.u.cl = gfc_new_charlen (f->sym->ns, f->sym->ts.u.cl); } f->sym->ts.u.cl->passed_length = length; /* Use the passed value for assumed length variables. */ if (!f->sym->ts.u.cl->length) { TREE_USED (length) = 1; gcc_assert (!f->sym->ts.u.cl->backend_decl); f->sym->ts.u.cl->backend_decl = length; } hidden_typelist = TREE_CHAIN (hidden_typelist); if (f->sym->ts.u.cl->backend_decl == NULL || f->sym->ts.u.cl->backend_decl == length) { if (f->sym->ts.u.cl->backend_decl == NULL) gfc_create_string_length (f->sym); /* Make sure PARM_DECL type doesn't point to incomplete type. */ if (f->sym->attr.flavor == FL_PROCEDURE) type = build_pointer_type (gfc_get_function_type (f->sym)); else type = gfc_sym_type (f->sym); } } /* For non-constant length array arguments, make sure they use a different type node from TYPE_ARG_TYPES type. */ if (f->sym->attr.dimension && type == TREE_VALUE (typelist) && TREE_CODE (type) == POINTER_TYPE && GFC_ARRAY_TYPE_P (type) && f->sym->as->type != AS_ASSUMED_SIZE && ! COMPLETE_TYPE_P (TREE_TYPE (type))) { if (f->sym->attr.flavor == FL_PROCEDURE) type = build_pointer_type (gfc_get_function_type (f->sym)); else type = gfc_sym_type (f->sym); } if (f->sym->attr.proc_pointer) type = build_pointer_type (type); if (f->sym->attr.volatile_) type = build_qualified_type (type, TYPE_QUAL_VOLATILE); /* Build the argument declaration. */ parm = build_decl (input_location, PARM_DECL, gfc_sym_identifier (f->sym), type); if (f->sym->attr.volatile_) { TREE_THIS_VOLATILE (parm) = 1; TREE_SIDE_EFFECTS (parm) = 1; } /* Fill in arg stuff. */ DECL_CONTEXT (parm) = fndecl; DECL_ARG_TYPE (parm) = TREE_VALUE (typelist); /* All implementation args are read-only. */ TREE_READONLY (parm) = 1; if (POINTER_TYPE_P (type) && (!f->sym->attr.proc_pointer && f->sym->attr.flavor != FL_PROCEDURE)) DECL_BY_REFERENCE (parm) = 1; gfc_finish_decl (parm); f->sym->backend_decl = parm; /* Coarrays which are descriptorless or assumed-shape pass with -fcoarray=lib the token and the offset as hidden arguments. */ if (f->sym->attr.codimension && gfc_option.coarray == GFC_FCOARRAY_LIB && !f->sym->attr.allocatable) { tree caf_type; tree token; tree offset; gcc_assert (f->sym->backend_decl != NULL_TREE && !sym->attr.is_bind_c); caf_type = TREE_TYPE (f->sym->backend_decl); token = build_decl (input_location, PARM_DECL, create_tmp_var_name ("caf_token"), build_qualified_type (pvoid_type_node, TYPE_QUAL_RESTRICT)); if (f->sym->as->type == AS_ASSUMED_SHAPE) { gcc_assert (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL || GFC_DECL_TOKEN (f->sym->backend_decl) == NULL_TREE); if (DECL_LANG_SPECIFIC (f->sym->backend_decl) == NULL) gfc_allocate_lang_decl (f->sym->backend_decl); GFC_DECL_TOKEN (f->sym->backend_decl) = token; } else { gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) == NULL_TREE); GFC_TYPE_ARRAY_CAF_TOKEN (caf_type) = token; } DECL_CONTEXT (token) = fndecl; DECL_ARTIFICIAL (token) = 1; DECL_ARG_TYPE (token) = TREE_VALUE (typelist); TREE_READONLY (token) = 1; hidden_arglist = chainon (hidden_arglist, token); gfc_finish_decl (token); offset = build_decl (input_location, PARM_DECL, create_tmp_var_name ("caf_offset"), gfc_array_index_type); if (f->sym->as->type == AS_ASSUMED_SHAPE) { gcc_assert (GFC_DECL_CAF_OFFSET (f->sym->backend_decl) == NULL_TREE); GFC_DECL_CAF_OFFSET (f->sym->backend_decl) = offset; } else { gcc_assert (GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) == NULL_TREE); GFC_TYPE_ARRAY_CAF_OFFSET (caf_type) = offset; } DECL_CONTEXT (offset) = fndecl; DECL_ARTIFICIAL (offset) = 1; DECL_ARG_TYPE (offset) = TREE_VALUE (typelist); TREE_READONLY (offset) = 1; hidden_arglist = chainon (hidden_arglist, offset); gfc_finish_decl (offset); } arglist = chainon (arglist, parm); typelist = TREE_CHAIN (typelist); } /* Add the hidden string length parameters, unless the procedure is bind(C). */ if (!sym->attr.is_bind_c) arglist = chainon (arglist, hidden_arglist); gcc_assert (hidden_typelist == NULL_TREE || TREE_VALUE (hidden_typelist) == void_type_node); DECL_ARGUMENTS (fndecl) = arglist; } /* Do the setup necessary before generating the body of a function. */ static void trans_function_start (gfc_symbol * sym) { tree fndecl; fndecl = sym->backend_decl; /* Let GCC know the current scope is this function. */ current_function_decl = fndecl; /* Let the world know what we're about to do. */ announce_function (fndecl); if (DECL_FILE_SCOPE_P (fndecl)) { /* Create RTL for function declaration. */ rest_of_decl_compilation (fndecl, 1, 0); } /* Create RTL for function definition. */ make_decl_rtl (fndecl); init_function_start (fndecl); /* function.c requires a push at the start of the function. */ pushlevel (0); } /* Create thunks for alternate entry points. */ static void build_entry_thunks (gfc_namespace * ns, bool global) { gfc_formal_arglist *formal; gfc_formal_arglist *thunk_formal; gfc_entry_list *el; gfc_symbol *thunk_sym; stmtblock_t body; tree thunk_fndecl; tree tmp; locus old_loc; /* This should always be a toplevel function. */ gcc_assert (current_function_decl == NULL_TREE); gfc_save_backend_locus (&old_loc); for (el = ns->entries; el; el = el->next) { VEC(tree,gc) *args = NULL; VEC(tree,gc) *string_args = NULL; thunk_sym = el->sym; build_function_decl (thunk_sym, global); create_function_arglist (thunk_sym); trans_function_start (thunk_sym); thunk_fndecl = thunk_sym->backend_decl; gfc_init_block (&body); /* Pass extra parameter identifying this entry point. */ tmp = build_int_cst (gfc_array_index_type, el->id); VEC_safe_push (tree, gc, args, tmp); if (thunk_sym->attr.function) { if (gfc_return_by_reference (ns->proc_name)) { tree ref = DECL_ARGUMENTS (current_function_decl); VEC_safe_push (tree, gc, args, ref); if (ns->proc_name->ts.type == BT_CHARACTER) VEC_safe_push (tree, gc, args, DECL_CHAIN (ref)); } } for (formal = ns->proc_name->formal; formal; formal = formal->next) { /* Ignore alternate returns. */ if (formal->sym == NULL) continue; /* We don't have a clever way of identifying arguments, so resort to a brute-force search. */ for (thunk_formal = thunk_sym->formal; thunk_formal; thunk_formal = thunk_formal->next) { if (thunk_formal->sym == formal->sym) break; } if (thunk_formal) { /* Pass the argument. */ DECL_ARTIFICIAL (thunk_formal->sym->backend_decl) = 1; VEC_safe_push (tree, gc, args, thunk_formal->sym->backend_decl); if (formal->sym->ts.type == BT_CHARACTER) { tmp = thunk_formal->sym->ts.u.cl->backend_decl; VEC_safe_push (tree, gc, string_args, tmp); } } else { /* Pass NULL for a missing argument. */ VEC_safe_push (tree, gc, args, null_pointer_node); if (formal->sym->ts.type == BT_CHARACTER) { tmp = build_int_cst (gfc_charlen_type_node, 0); VEC_safe_push (tree, gc, string_args, tmp); } } } /* Call the master function. */ VEC_safe_splice (tree, gc, args, string_args); tmp = ns->proc_name->backend_decl; tmp = build_call_expr_loc_vec (input_location, tmp, args); if (ns->proc_name->attr.mixed_entry_master) { tree union_decl, field; tree master_type = TREE_TYPE (ns->proc_name->backend_decl); union_decl = build_decl (input_location, VAR_DECL, get_identifier ("__result"), TREE_TYPE (master_type)); DECL_ARTIFICIAL (union_decl) = 1; DECL_EXTERNAL (union_decl) = 0; TREE_PUBLIC (union_decl) = 0; TREE_USED (union_decl) = 1; layout_decl (union_decl, 0); pushdecl (union_decl); DECL_CONTEXT (union_decl) = current_function_decl; tmp = fold_build2_loc (input_location, MODIFY_EXPR, TREE_TYPE (union_decl), union_decl, tmp); gfc_add_expr_to_block (&body, tmp); for (field = TYPE_FIELDS (TREE_TYPE (union_decl)); field; field = DECL_CHAIN (field)) if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), thunk_sym->result->name) == 0) break; gcc_assert (field != NULL_TREE); tmp = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), union_decl, field, NULL_TREE); tmp = fold_build2_loc (input_location, MODIFY_EXPR, TREE_TYPE (DECL_RESULT (current_function_decl)), DECL_RESULT (current_function_decl), tmp); tmp = build1_v (RETURN_EXPR, tmp); } else if (TREE_TYPE (DECL_RESULT (current_function_decl)) != void_type_node) { tmp = fold_build2_loc (input_location, MODIFY_EXPR, TREE_TYPE (DECL_RESULT (current_function_decl)), DECL_RESULT (current_function_decl), tmp); tmp = build1_v (RETURN_EXPR, tmp); } gfc_add_expr_to_block (&body, tmp); /* Finish off this function and send it for code generation. */ DECL_SAVED_TREE (thunk_fndecl) = gfc_finish_block (&body); tmp = getdecls (); poplevel (1, 0, 1); BLOCK_SUPERCONTEXT (DECL_INITIAL (thunk_fndecl)) = thunk_fndecl; DECL_SAVED_TREE (thunk_fndecl) = build3_v (BIND_EXPR, tmp, DECL_SAVED_TREE (thunk_fndecl), DECL_INITIAL (thunk_fndecl)); /* Output the GENERIC tree. */ dump_function (TDI_original, thunk_fndecl); /* Store the end of the function, so that we get good line number info for the epilogue. */ cfun->function_end_locus = input_location; /* We're leaving the context of this function, so zap cfun. It's still in DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */ set_cfun (NULL); current_function_decl = NULL_TREE; cgraph_finalize_function (thunk_fndecl, true); /* We share the symbols in the formal argument list with other entry points and the master function. Clear them so that they are recreated for each function. */ for (formal = thunk_sym->formal; formal; formal = formal->next) if (formal->sym != NULL) /* Ignore alternate returns. */ { formal->sym->backend_decl = NULL_TREE; if (formal->sym->ts.type == BT_CHARACTER) formal->sym->ts.u.cl->backend_decl = NULL_TREE; } if (thunk_sym->attr.function) { if (thunk_sym->ts.type == BT_CHARACTER) thunk_sym->ts.u.cl->backend_decl = NULL_TREE; if (thunk_sym->result->ts.type == BT_CHARACTER) thunk_sym->result->ts.u.cl->backend_decl = NULL_TREE; } } gfc_restore_backend_locus (&old_loc); } /* Create a decl for a function, and create any thunks for alternate entry points. If global is true, generate the function in the global binding level, otherwise in the current binding level (which can be global). */ void gfc_create_function_decl (gfc_namespace * ns, bool global) { /* Create a declaration for the master function. */ build_function_decl (ns->proc_name, global); /* Compile the entry thunks. */ if (ns->entries) build_entry_thunks (ns, global); /* Now create the read argument list. */ create_function_arglist (ns->proc_name); } /* Return the decl used to hold the function return value. If parent_flag is set, the context is the parent_scope. */ tree gfc_get_fake_result_decl (gfc_symbol * sym, int parent_flag) { tree decl; tree length; tree this_fake_result_decl; tree this_function_decl; char name[GFC_MAX_SYMBOL_LEN + 10]; if (parent_flag) { this_fake_result_decl = parent_fake_result_decl; this_function_decl = DECL_CONTEXT (current_function_decl); } else { this_fake_result_decl = current_fake_result_decl; this_function_decl = current_function_decl; } if (sym && sym->ns->proc_name->backend_decl == this_function_decl && sym->ns->proc_name->attr.entry_master && sym != sym->ns->proc_name) { tree t = NULL, var; if (this_fake_result_decl != NULL) for (t = TREE_CHAIN (this_fake_result_decl); t; t = TREE_CHAIN (t)) if (strcmp (IDENTIFIER_POINTER (TREE_PURPOSE (t)), sym->name) == 0) break; if (t) return TREE_VALUE (t); decl = gfc_get_fake_result_decl (sym->ns->proc_name, parent_flag); if (parent_flag) this_fake_result_decl = parent_fake_result_decl; else this_fake_result_decl = current_fake_result_decl; if (decl && sym->ns->proc_name->attr.mixed_entry_master) { tree field; for (field = TYPE_FIELDS (TREE_TYPE (decl)); field; field = DECL_CHAIN (field)) if (strcmp (IDENTIFIER_POINTER (DECL_NAME (field)), sym->name) == 0) break; gcc_assert (field != NULL_TREE); decl = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (field), decl, field, NULL_TREE); } var = create_tmp_var_raw (TREE_TYPE (decl), sym->name); if (parent_flag) gfc_add_decl_to_parent_function (var); else gfc_add_decl_to_function (var); SET_DECL_VALUE_EXPR (var, decl); DECL_HAS_VALUE_EXPR_P (var) = 1; GFC_DECL_RESULT (var) = 1; TREE_CHAIN (this_fake_result_decl) = tree_cons (get_identifier (sym->name), var, TREE_CHAIN (this_fake_result_decl)); return var; } if (this_fake_result_decl != NULL_TREE) return TREE_VALUE (this_fake_result_decl); /* Only when gfc_get_fake_result_decl is called by gfc_trans_return, sym is NULL. */ if (!sym) return NULL_TREE; if (sym->ts.type == BT_CHARACTER) { if (sym->ts.u.cl->backend_decl == NULL_TREE) length = gfc_create_string_length (sym); else length = sym->ts.u.cl->backend_decl; if (TREE_CODE (length) == VAR_DECL && DECL_CONTEXT (length) == NULL_TREE) gfc_add_decl_to_function (length); } if (gfc_return_by_reference (sym)) { decl = DECL_ARGUMENTS (this_function_decl); if (sym->ns->proc_name->backend_decl == this_function_decl && sym->ns->proc_name->attr.entry_master) decl = DECL_CHAIN (decl); TREE_USED (decl) = 1; if (sym->as) decl = gfc_build_dummy_array_decl (sym, decl); } else { sprintf (name, "__result_%.20s", IDENTIFIER_POINTER (DECL_NAME (this_function_decl))); if (!sym->attr.mixed_entry_master && sym->attr.function) decl = build_decl (DECL_SOURCE_LOCATION (this_function_decl), VAR_DECL, get_identifier (name), gfc_sym_type (sym)); else decl = build_decl (DECL_SOURCE_LOCATION (this_function_decl), VAR_DECL, get_identifier (name), TREE_TYPE (TREE_TYPE (this_function_decl))); DECL_ARTIFICIAL (decl) = 1; DECL_EXTERNAL (decl) = 0; TREE_PUBLIC (decl) = 0; TREE_USED (decl) = 1; GFC_DECL_RESULT (decl) = 1; TREE_ADDRESSABLE (decl) = 1; layout_decl (decl, 0); if (parent_flag) gfc_add_decl_to_parent_function (decl); else gfc_add_decl_to_function (decl); } if (parent_flag) parent_fake_result_decl = build_tree_list (NULL, decl); else current_fake_result_decl = build_tree_list (NULL, decl); return decl; } /* Builds a function decl. The remaining parameters are the types of the function arguments. Negative nargs indicates a varargs function. */ static tree build_library_function_decl_1 (tree name, const char *spec, tree rettype, int nargs, va_list p) { VEC(tree,gc) *arglist; tree fntype; tree fndecl; int n; /* Library functions must be declared with global scope. */ gcc_assert (current_function_decl == NULL_TREE); /* Create a list of the argument types. */ arglist = VEC_alloc (tree, gc, abs (nargs)); for (n = abs (nargs); n > 0; n--) { tree argtype = va_arg (p, tree); VEC_quick_push (tree, arglist, argtype); } /* Build the function type and decl. */ if (nargs >= 0) fntype = build_function_type_vec (rettype, arglist); else fntype = build_varargs_function_type_vec (rettype, arglist); if (spec) { tree attr_args = build_tree_list (NULL_TREE, build_string (strlen (spec), spec)); tree attrs = tree_cons (get_identifier ("fn spec"), attr_args, TYPE_ATTRIBUTES (fntype)); fntype = build_type_attribute_variant (fntype, attrs); } fndecl = build_decl (input_location, FUNCTION_DECL, name, fntype); /* Mark this decl as external. */ DECL_EXTERNAL (fndecl) = 1; TREE_PUBLIC (fndecl) = 1; pushdecl (fndecl); rest_of_decl_compilation (fndecl, 1, 0); return fndecl; } /* Builds a function decl. The remaining parameters are the types of the function arguments. Negative nargs indicates a varargs function. */ tree gfc_build_library_function_decl (tree name, tree rettype, int nargs, ...) { tree ret; va_list args; va_start (args, nargs); ret = build_library_function_decl_1 (name, NULL, rettype, nargs, args); va_end (args); return ret; } /* Builds a function decl. The remaining parameters are the types of the function arguments. Negative nargs indicates a varargs function. The SPEC parameter specifies the function argument and return type specification according to the fnspec function type attribute. */ tree gfc_build_library_function_decl_with_spec (tree name, const char *spec, tree rettype, int nargs, ...) { tree ret; va_list args; va_start (args, nargs); ret = build_library_function_decl_1 (name, spec, rettype, nargs, args); va_end (args); return ret; } static void gfc_build_intrinsic_function_decls (void) { tree gfc_int4_type_node = gfc_get_int_type (4); tree gfc_int8_type_node = gfc_get_int_type (8); tree gfc_int16_type_node = gfc_get_int_type (16); tree gfc_logical4_type_node = gfc_get_logical_type (4); tree pchar1_type_node = gfc_get_pchar_type (1); tree pchar4_type_node = gfc_get_pchar_type (4); /* String functions. */ gfor_fndecl_compare_string = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("compare_string")), "..R.R", integer_type_node, 4, gfc_charlen_type_node, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node); DECL_PURE_P (gfor_fndecl_compare_string) = 1; TREE_NOTHROW (gfor_fndecl_compare_string) = 1; gfor_fndecl_concat_string = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("concat_string")), "..W.R.R", void_type_node, 6, gfc_charlen_type_node, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node); TREE_NOTHROW (gfor_fndecl_concat_string) = 1; gfor_fndecl_string_len_trim = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_len_trim")), "..R", gfc_charlen_type_node, 2, gfc_charlen_type_node, pchar1_type_node); DECL_PURE_P (gfor_fndecl_string_len_trim) = 1; TREE_NOTHROW (gfor_fndecl_string_len_trim) = 1; gfor_fndecl_string_index = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_index")), "..R.R.", gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node); DECL_PURE_P (gfor_fndecl_string_index) = 1; TREE_NOTHROW (gfor_fndecl_string_index) = 1; gfor_fndecl_string_scan = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_scan")), "..R.R.", gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node); DECL_PURE_P (gfor_fndecl_string_scan) = 1; TREE_NOTHROW (gfor_fndecl_string_scan) = 1; gfor_fndecl_string_verify = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_verify")), "..R.R.", gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node, gfc_logical4_type_node); DECL_PURE_P (gfor_fndecl_string_verify) = 1; TREE_NOTHROW (gfor_fndecl_string_verify) = 1; gfor_fndecl_string_trim = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_trim")), ".Ww.R", void_type_node, 4, build_pointer_type (gfc_charlen_type_node), build_pointer_type (pchar1_type_node), gfc_charlen_type_node, pchar1_type_node); gfor_fndecl_string_minmax = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_minmax")), ".Ww.R", void_type_node, -4, build_pointer_type (gfc_charlen_type_node), build_pointer_type (pchar1_type_node), integer_type_node, integer_type_node); gfor_fndecl_adjustl = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("adjustl")), ".W.R", void_type_node, 3, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node); TREE_NOTHROW (gfor_fndecl_adjustl) = 1; gfor_fndecl_adjustr = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("adjustr")), ".W.R", void_type_node, 3, pchar1_type_node, gfc_charlen_type_node, pchar1_type_node); TREE_NOTHROW (gfor_fndecl_adjustr) = 1; gfor_fndecl_select_string = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("select_string")), ".R.R.", integer_type_node, 4, pvoid_type_node, integer_type_node, pchar1_type_node, gfc_charlen_type_node); DECL_PURE_P (gfor_fndecl_select_string) = 1; TREE_NOTHROW (gfor_fndecl_select_string) = 1; gfor_fndecl_compare_string_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("compare_string_char4")), "..R.R", integer_type_node, 4, gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node); DECL_PURE_P (gfor_fndecl_compare_string_char4) = 1; TREE_NOTHROW (gfor_fndecl_compare_string_char4) = 1; gfor_fndecl_concat_string_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("concat_string_char4")), "..W.R.R", void_type_node, 6, gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node); TREE_NOTHROW (gfor_fndecl_concat_string_char4) = 1; gfor_fndecl_string_len_trim_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_len_trim_char4")), "..R", gfc_charlen_type_node, 2, gfc_charlen_type_node, pchar4_type_node); DECL_PURE_P (gfor_fndecl_string_len_trim_char4) = 1; TREE_NOTHROW (gfor_fndecl_string_len_trim_char4) = 1; gfor_fndecl_string_index_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_index_char4")), "..R.R.", gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node); DECL_PURE_P (gfor_fndecl_string_index_char4) = 1; TREE_NOTHROW (gfor_fndecl_string_index_char4) = 1; gfor_fndecl_string_scan_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_scan_char4")), "..R.R.", gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node); DECL_PURE_P (gfor_fndecl_string_scan_char4) = 1; TREE_NOTHROW (gfor_fndecl_string_scan_char4) = 1; gfor_fndecl_string_verify_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_verify_char4")), "..R.R.", gfc_charlen_type_node, 5, gfc_charlen_type_node, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node, gfc_logical4_type_node); DECL_PURE_P (gfor_fndecl_string_verify_char4) = 1; TREE_NOTHROW (gfor_fndecl_string_verify_char4) = 1; gfor_fndecl_string_trim_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_trim_char4")), ".Ww.R", void_type_node, 4, build_pointer_type (gfc_charlen_type_node), build_pointer_type (pchar4_type_node), gfc_charlen_type_node, pchar4_type_node); gfor_fndecl_string_minmax_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("string_minmax_char4")), ".Ww.R", void_type_node, -4, build_pointer_type (gfc_charlen_type_node), build_pointer_type (pchar4_type_node), integer_type_node, integer_type_node); gfor_fndecl_adjustl_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("adjustl_char4")), ".W.R", void_type_node, 3, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node); TREE_NOTHROW (gfor_fndecl_adjustl_char4) = 1; gfor_fndecl_adjustr_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("adjustr_char4")), ".W.R", void_type_node, 3, pchar4_type_node, gfc_charlen_type_node, pchar4_type_node); TREE_NOTHROW (gfor_fndecl_adjustr_char4) = 1; gfor_fndecl_select_string_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("select_string_char4")), ".R.R.", integer_type_node, 4, pvoid_type_node, integer_type_node, pvoid_type_node, gfc_charlen_type_node); DECL_PURE_P (gfor_fndecl_select_string_char4) = 1; TREE_NOTHROW (gfor_fndecl_select_string_char4) = 1; /* Conversion between character kinds. */ gfor_fndecl_convert_char1_to_char4 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("convert_char1_to_char4")), ".w.R", void_type_node, 3, build_pointer_type (pchar4_type_node), gfc_charlen_type_node, pchar1_type_node); gfor_fndecl_convert_char4_to_char1 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("convert_char4_to_char1")), ".w.R", void_type_node, 3, build_pointer_type (pchar1_type_node), gfc_charlen_type_node, pchar4_type_node); /* Misc. functions. */ gfor_fndecl_ttynam = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("ttynam")), ".W", void_type_node, 3, pchar_type_node, gfc_charlen_type_node, integer_type_node); gfor_fndecl_fdate = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("fdate")), ".W", void_type_node, 2, pchar_type_node, gfc_charlen_type_node); gfor_fndecl_ctime = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("ctime")), ".W", void_type_node, 3, pchar_type_node, gfc_charlen_type_node, gfc_int8_type_node); gfor_fndecl_sc_kind = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("selected_char_kind")), "..R", gfc_int4_type_node, 2, gfc_charlen_type_node, pchar_type_node); DECL_PURE_P (gfor_fndecl_sc_kind) = 1; TREE_NOTHROW (gfor_fndecl_sc_kind) = 1; gfor_fndecl_si_kind = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("selected_int_kind")), ".R", gfc_int4_type_node, 1, pvoid_type_node); DECL_PURE_P (gfor_fndecl_si_kind) = 1; TREE_NOTHROW (gfor_fndecl_si_kind) = 1; gfor_fndecl_sr_kind = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("selected_real_kind2008")), ".RR", gfc_int4_type_node, 3, pvoid_type_node, pvoid_type_node, pvoid_type_node); DECL_PURE_P (gfor_fndecl_sr_kind) = 1; TREE_NOTHROW (gfor_fndecl_sr_kind) = 1; /* Power functions. */ { tree ctype, rtype, itype, jtype; int rkind, ikind, jkind; #define NIKINDS 3 #define NRKINDS 4 static int ikinds[NIKINDS] = {4, 8, 16}; static int rkinds[NRKINDS] = {4, 8, 10, 16}; char name[PREFIX_LEN + 12]; /* _gfortran_pow_?n_?n */ for (ikind=0; ikind < NIKINDS; ikind++) { itype = gfc_get_int_type (ikinds[ikind]); for (jkind=0; jkind < NIKINDS; jkind++) { jtype = gfc_get_int_type (ikinds[jkind]); if (itype && jtype) { sprintf(name, PREFIX("pow_i%d_i%d"), ikinds[ikind], ikinds[jkind]); gfor_fndecl_math_powi[jkind][ikind].integer = gfc_build_library_function_decl (get_identifier (name), jtype, 2, jtype, itype); TREE_READONLY (gfor_fndecl_math_powi[jkind][ikind].integer) = 1; TREE_NOTHROW (gfor_fndecl_math_powi[jkind][ikind].integer) = 1; } } for (rkind = 0; rkind < NRKINDS; rkind ++) { rtype = gfc_get_real_type (rkinds[rkind]); if (rtype && itype) { sprintf(name, PREFIX("pow_r%d_i%d"), rkinds[rkind], ikinds[ikind]); gfor_fndecl_math_powi[rkind][ikind].real = gfc_build_library_function_decl (get_identifier (name), rtype, 2, rtype, itype); TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].real) = 1; TREE_NOTHROW (gfor_fndecl_math_powi[rkind][ikind].real) = 1; } ctype = gfc_get_complex_type (rkinds[rkind]); if (ctype && itype) { sprintf(name, PREFIX("pow_c%d_i%d"), rkinds[rkind], ikinds[ikind]); gfor_fndecl_math_powi[rkind][ikind].cmplx = gfc_build_library_function_decl (get_identifier (name), ctype, 2,ctype, itype); TREE_READONLY (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1; TREE_NOTHROW (gfor_fndecl_math_powi[rkind][ikind].cmplx) = 1; } } } #undef NIKINDS #undef NRKINDS } gfor_fndecl_math_ishftc4 = gfc_build_library_function_decl ( get_identifier (PREFIX("ishftc4")), gfc_int4_type_node, 3, gfc_int4_type_node, gfc_int4_type_node, gfc_int4_type_node); TREE_READONLY (gfor_fndecl_math_ishftc4) = 1; TREE_NOTHROW (gfor_fndecl_math_ishftc4) = 1; gfor_fndecl_math_ishftc8 = gfc_build_library_function_decl ( get_identifier (PREFIX("ishftc8")), gfc_int8_type_node, 3, gfc_int8_type_node, gfc_int4_type_node, gfc_int4_type_node); TREE_READONLY (gfor_fndecl_math_ishftc8) = 1; TREE_NOTHROW (gfor_fndecl_math_ishftc8) = 1; if (gfc_int16_type_node) { gfor_fndecl_math_ishftc16 = gfc_build_library_function_decl ( get_identifier (PREFIX("ishftc16")), gfc_int16_type_node, 3, gfc_int16_type_node, gfc_int4_type_node, gfc_int4_type_node); TREE_READONLY (gfor_fndecl_math_ishftc16) = 1; TREE_NOTHROW (gfor_fndecl_math_ishftc16) = 1; } /* BLAS functions. */ { tree pint = build_pointer_type (integer_type_node); tree ps = build_pointer_type (gfc_get_real_type (gfc_default_real_kind)); tree pd = build_pointer_type (gfc_get_real_type (gfc_default_double_kind)); tree pc = build_pointer_type (gfc_get_complex_type (gfc_default_real_kind)); tree pz = build_pointer_type (gfc_get_complex_type (gfc_default_double_kind)); gfor_fndecl_sgemm = gfc_build_library_function_decl (get_identifier (gfc_option.flag_underscoring ? "sgemm_" : "sgemm"), void_type_node, 15, pchar_type_node, pchar_type_node, pint, pint, pint, ps, ps, pint, ps, pint, ps, ps, pint, integer_type_node, integer_type_node); gfor_fndecl_dgemm = gfc_build_library_function_decl (get_identifier (gfc_option.flag_underscoring ? "dgemm_" : "dgemm"), void_type_node, 15, pchar_type_node, pchar_type_node, pint, pint, pint, pd, pd, pint, pd, pint, pd, pd, pint, integer_type_node, integer_type_node); gfor_fndecl_cgemm = gfc_build_library_function_decl (get_identifier (gfc_option.flag_underscoring ? "cgemm_" : "cgemm"), void_type_node, 15, pchar_type_node, pchar_type_node, pint, pint, pint, pc, pc, pint, pc, pint, pc, pc, pint, integer_type_node, integer_type_node); gfor_fndecl_zgemm = gfc_build_library_function_decl (get_identifier (gfc_option.flag_underscoring ? "zgemm_" : "zgemm"), void_type_node, 15, pchar_type_node, pchar_type_node, pint, pint, pint, pz, pz, pint, pz, pint, pz, pz, pint, integer_type_node, integer_type_node); } /* Other functions. */ gfor_fndecl_size0 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("size0")), ".R", gfc_array_index_type, 1, pvoid_type_node); DECL_PURE_P (gfor_fndecl_size0) = 1; TREE_NOTHROW (gfor_fndecl_size0) = 1; gfor_fndecl_size1 = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("size1")), ".R", gfc_array_index_type, 2, pvoid_type_node, gfc_array_index_type); DECL_PURE_P (gfor_fndecl_size1) = 1; TREE_NOTHROW (gfor_fndecl_size1) = 1; gfor_fndecl_iargc = gfc_build_library_function_decl ( get_identifier (PREFIX ("iargc")), gfc_int4_type_node, 0); TREE_NOTHROW (gfor_fndecl_iargc) = 1; } /* Make prototypes for runtime library functions. */ void gfc_build_builtin_function_decls (void) { tree gfc_int4_type_node = gfc_get_int_type (4); gfor_fndecl_stop_numeric = gfc_build_library_function_decl ( get_identifier (PREFIX("stop_numeric")), void_type_node, 1, gfc_int4_type_node); /* STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric) = 1; gfor_fndecl_stop_numeric_f08 = gfc_build_library_function_decl ( get_identifier (PREFIX("stop_numeric_f08")), void_type_node, 1, gfc_int4_type_node); /* STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_stop_numeric_f08) = 1; gfor_fndecl_stop_string = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("stop_string")), ".R.", void_type_node, 2, pchar_type_node, gfc_int4_type_node); /* STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_stop_string) = 1; gfor_fndecl_error_stop_numeric = gfc_build_library_function_decl ( get_identifier (PREFIX("error_stop_numeric")), void_type_node, 1, gfc_int4_type_node); /* ERROR STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_error_stop_numeric) = 1; gfor_fndecl_error_stop_string = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("error_stop_string")), ".R.", void_type_node, 2, pchar_type_node, gfc_int4_type_node); /* ERROR STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_error_stop_string) = 1; gfor_fndecl_pause_numeric = gfc_build_library_function_decl ( get_identifier (PREFIX("pause_numeric")), void_type_node, 1, gfc_int4_type_node); gfor_fndecl_pause_string = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("pause_string")), ".R.", void_type_node, 2, pchar_type_node, gfc_int4_type_node); gfor_fndecl_runtime_error = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("runtime_error")), ".R", void_type_node, -1, pchar_type_node); /* The runtime_error function does not return. */ TREE_THIS_VOLATILE (gfor_fndecl_runtime_error) = 1; gfor_fndecl_runtime_error_at = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("runtime_error_at")), ".RR", void_type_node, -2, pchar_type_node, pchar_type_node); /* The runtime_error_at function does not return. */ TREE_THIS_VOLATILE (gfor_fndecl_runtime_error_at) = 1; gfor_fndecl_runtime_warning_at = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("runtime_warning_at")), ".RR", void_type_node, -2, pchar_type_node, pchar_type_node); gfor_fndecl_generate_error = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("generate_error")), ".R.R", void_type_node, 3, pvoid_type_node, integer_type_node, pchar_type_node); gfor_fndecl_os_error = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("os_error")), ".R", void_type_node, 1, pchar_type_node); /* The runtime_error function does not return. */ TREE_THIS_VOLATILE (gfor_fndecl_os_error) = 1; gfor_fndecl_set_args = gfc_build_library_function_decl ( get_identifier (PREFIX("set_args")), void_type_node, 2, integer_type_node, build_pointer_type (pchar_type_node)); gfor_fndecl_set_fpe = gfc_build_library_function_decl ( get_identifier (PREFIX("set_fpe")), void_type_node, 1, integer_type_node); /* Keep the array dimension in sync with the call, later in this file. */ gfor_fndecl_set_options = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("set_options")), "..R", void_type_node, 2, integer_type_node, build_pointer_type (integer_type_node)); gfor_fndecl_set_convert = gfc_build_library_function_decl ( get_identifier (PREFIX("set_convert")), void_type_node, 1, integer_type_node); gfor_fndecl_set_record_marker = gfc_build_library_function_decl ( get_identifier (PREFIX("set_record_marker")), void_type_node, 1, integer_type_node); gfor_fndecl_set_max_subrecord_length = gfc_build_library_function_decl ( get_identifier (PREFIX("set_max_subrecord_length")), void_type_node, 1, integer_type_node); gfor_fndecl_in_pack = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("internal_pack")), ".r", pvoid_type_node, 1, pvoid_type_node); gfor_fndecl_in_unpack = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("internal_unpack")), ".wR", void_type_node, 2, pvoid_type_node, pvoid_type_node); gfor_fndecl_associated = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("associated")), ".RR", integer_type_node, 2, ppvoid_type_node, ppvoid_type_node); DECL_PURE_P (gfor_fndecl_associated) = 1; TREE_NOTHROW (gfor_fndecl_associated) = 1; /* Coarray library calls. */ if (gfc_option.coarray == GFC_FCOARRAY_LIB) { tree pint_type, pppchar_type; pint_type = build_pointer_type (integer_type_node); pppchar_type = build_pointer_type (build_pointer_type (pchar_type_node)); gfor_fndecl_caf_init = gfc_build_library_function_decl ( get_identifier (PREFIX("caf_init")), void_type_node, 4, pint_type, pppchar_type, pint_type, pint_type); gfor_fndecl_caf_finalize = gfc_build_library_function_decl ( get_identifier (PREFIX("caf_finalize")), void_type_node, 0); gfor_fndecl_caf_register = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("caf_register")), "...WWW", pvoid_type_node, 6, size_type_node, integer_type_node, ppvoid_type_node, pint_type, pchar_type_node, integer_type_node); gfor_fndecl_caf_deregister = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("caf_deregister")), ".WWW", void_type_node, 4, ppvoid_type_node, pint_type, pchar_type_node, integer_type_node); gfor_fndecl_caf_critical = gfc_build_library_function_decl ( get_identifier (PREFIX("caf_critical")), void_type_node, 0); gfor_fndecl_caf_end_critical = gfc_build_library_function_decl ( get_identifier (PREFIX("caf_end_critical")), void_type_node, 0); gfor_fndecl_caf_sync_all = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("caf_sync_all")), ".WW", void_type_node, 3, pint_type, build_pointer_type (pchar_type_node), integer_type_node); gfor_fndecl_caf_sync_images = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("caf_sync_images")), ".RRWW", void_type_node, 5, integer_type_node, pint_type, pint_type, build_pointer_type (pchar_type_node), integer_type_node); gfor_fndecl_caf_error_stop = gfc_build_library_function_decl ( get_identifier (PREFIX("caf_error_stop")), void_type_node, 1, gfc_int4_type_node); /* CAF's ERROR STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_caf_error_stop) = 1; gfor_fndecl_caf_error_stop_str = gfc_build_library_function_decl_with_spec ( get_identifier (PREFIX("caf_error_stop_str")), ".R.", void_type_node, 2, pchar_type_node, gfc_int4_type_node); /* CAF's ERROR STOP doesn't return. */ TREE_THIS_VOLATILE (gfor_fndecl_caf_error_stop_str) = 1; } gfc_build_intrinsic_function_decls (); gfc_build_intrinsic_lib_fndecls (); gfc_build_io_library_fndecls (); } /* Evaluate the length of dummy character variables. */ static void gfc_trans_dummy_character (gfc_symbol *sym, gfc_charlen *cl, gfc_wrapped_block *block) { stmtblock_t init; gfc_finish_decl (cl->backend_decl); gfc_start_block (&init); /* Evaluate the string length expression. */ gfc_conv_string_length (cl, NULL, &init); gfc_trans_vla_type_sizes (sym, &init); gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); } /* Allocate and cleanup an automatic character variable. */ static void gfc_trans_auto_character_variable (gfc_symbol * sym, gfc_wrapped_block * block) { stmtblock_t init; tree decl; tree tmp; gcc_assert (sym->backend_decl); gcc_assert (sym->ts.u.cl && sym->ts.u.cl->length); gfc_init_block (&init); /* Evaluate the string length expression. */ gfc_conv_string_length (sym->ts.u.cl, NULL, &init); gfc_trans_vla_type_sizes (sym, &init); decl = sym->backend_decl; /* Emit a DECL_EXPR for this variable, which will cause the gimplifier to allocate storage, and all that good stuff. */ tmp = fold_build1_loc (input_location, DECL_EXPR, TREE_TYPE (decl), decl); gfc_add_expr_to_block (&init, tmp); gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); } /* Set the initial value of ASSIGN statement auxiliary variable explicitly. */ static void gfc_trans_assign_aux_var (gfc_symbol * sym, gfc_wrapped_block * block) { stmtblock_t init; gcc_assert (sym->backend_decl); gfc_start_block (&init); /* Set the initial value to length. See the comments in function gfc_add_assign_aux_vars in this file. */ gfc_add_modify (&init, GFC_DECL_STRING_LEN (sym->backend_decl), build_int_cst (gfc_charlen_type_node, -2)); gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); } static void gfc_trans_vla_one_sizepos (tree *tp, stmtblock_t *body) { tree t = *tp, var, val; if (t == NULL || t == error_mark_node) return; if (TREE_CONSTANT (t) || DECL_P (t)) return; if (TREE_CODE (t) == SAVE_EXPR) { if (SAVE_EXPR_RESOLVED_P (t)) { *tp = TREE_OPERAND (t, 0); return; } val = TREE_OPERAND (t, 0); } else val = t; var = gfc_create_var_np (TREE_TYPE (t), NULL); gfc_add_decl_to_function (var); gfc_add_modify (body, var, val); if (TREE_CODE (t) == SAVE_EXPR) TREE_OPERAND (t, 0) = var; *tp = var; } static void gfc_trans_vla_type_sizes_1 (tree type, stmtblock_t *body) { tree t; if (type == NULL || type == error_mark_node) return; type = TYPE_MAIN_VARIANT (type); if (TREE_CODE (type) == INTEGER_TYPE) { gfc_trans_vla_one_sizepos (&TYPE_MIN_VALUE (type), body); gfc_trans_vla_one_sizepos (&TYPE_MAX_VALUE (type), body); for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) { TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (type); TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (type); } } else if (TREE_CODE (type) == ARRAY_TYPE) { gfc_trans_vla_type_sizes_1 (TREE_TYPE (type), body); gfc_trans_vla_type_sizes_1 (TYPE_DOMAIN (type), body); gfc_trans_vla_one_sizepos (&TYPE_SIZE (type), body); gfc_trans_vla_one_sizepos (&TYPE_SIZE_UNIT (type), body); for (t = TYPE_NEXT_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t)) { TYPE_SIZE (t) = TYPE_SIZE (type); TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (type); } } } /* Make sure all type sizes and array domains are either constant, or variable or parameter decls. This is a simplified variant of gimplify_type_sizes, but we can't use it here, as none of the variables in the expressions have been gimplified yet. As type sizes and domains for various variable length arrays contain VAR_DECLs that are only initialized at gfc_trans_deferred_vars time, without this routine gimplify_type_sizes in the middle-end could result in the type sizes being gimplified earlier than where those variables are initialized. */ void gfc_trans_vla_type_sizes (gfc_symbol *sym, stmtblock_t *body) { tree type = TREE_TYPE (sym->backend_decl); if (TREE_CODE (type) == FUNCTION_TYPE && (sym->attr.function || sym->attr.result || sym->attr.entry)) { if (! current_fake_result_decl) return; type = TREE_TYPE (TREE_VALUE (current_fake_result_decl)); } while (POINTER_TYPE_P (type)) type = TREE_TYPE (type); if (GFC_DESCRIPTOR_TYPE_P (type)) { tree etype = GFC_TYPE_ARRAY_DATAPTR_TYPE (type); while (POINTER_TYPE_P (etype)) etype = TREE_TYPE (etype); gfc_trans_vla_type_sizes_1 (etype, body); } gfc_trans_vla_type_sizes_1 (type, body); } /* Initialize a derived type by building an lvalue from the symbol and using trans_assignment to do the work. Set dealloc to false if no deallocation prior the assignment is needed. */ void gfc_init_default_dt (gfc_symbol * sym, stmtblock_t * block, bool dealloc) { gfc_expr *e; tree tmp; tree present; gcc_assert (block); gcc_assert (!sym->attr.allocatable); gfc_set_sym_referenced (sym); e = gfc_lval_expr_from_sym (sym); tmp = gfc_trans_assignment (e, sym->value, false, dealloc); if (sym->attr.dummy && (sym->attr.optional || sym->ns->proc_name->attr.entry_master)) { present = gfc_conv_expr_present (sym); tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp), present, tmp, build_empty_stmt (input_location)); } gfc_add_expr_to_block (block, tmp); gfc_free_expr (e); } /* Initialize INTENT(OUT) derived type dummies. As well as giving them their default initializer, if they do not have allocatable components, they have their allocatable components deallocated. */ static void init_intent_out_dt (gfc_symbol * proc_sym, gfc_wrapped_block * block) { stmtblock_t init; gfc_formal_arglist *f; tree tmp; tree present; gfc_init_block (&init); for (f = proc_sym->formal; f; f = f->next) if (f->sym && f->sym->attr.intent == INTENT_OUT && !f->sym->attr.pointer && f->sym->ts.type == BT_DERIVED) { if (f->sym->ts.u.derived->attr.alloc_comp && !f->sym->value) { tmp = gfc_deallocate_alloc_comp (f->sym->ts.u.derived, f->sym->backend_decl, f->sym->as ? f->sym->as->rank : 0); if (f->sym->attr.optional || f->sym->ns->proc_name->attr.entry_master) { present = gfc_conv_expr_present (f->sym); tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp), present, tmp, build_empty_stmt (input_location)); } gfc_add_expr_to_block (&init, tmp); } else if (f->sym->value) gfc_init_default_dt (f->sym, &init, true); } else if (f->sym && f->sym->attr.intent == INTENT_OUT && f->sym->ts.type == BT_CLASS && !CLASS_DATA (f->sym)->attr.class_pointer && CLASS_DATA (f->sym)->ts.u.derived->attr.alloc_comp) { tree decl = build_fold_indirect_ref_loc (input_location, f->sym->backend_decl); tmp = CLASS_DATA (f->sym)->backend_decl; tmp = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (tmp), decl, tmp, NULL_TREE); tmp = build_fold_indirect_ref_loc (input_location, tmp); tmp = gfc_deallocate_alloc_comp (CLASS_DATA (f->sym)->ts.u.derived, tmp, CLASS_DATA (f->sym)->as ? CLASS_DATA (f->sym)->as->rank : 0); if (f->sym->attr.optional || f->sym->ns->proc_name->attr.entry_master) { present = gfc_conv_expr_present (f->sym); tmp = build3_loc (input_location, COND_EXPR, TREE_TYPE (tmp), present, tmp, build_empty_stmt (input_location)); } gfc_add_expr_to_block (&init, tmp); } gfc_add_init_cleanup (block, gfc_finish_block (&init), NULL_TREE); } /* Generate function entry and exit code, and add it to the function body. This includes: Allocation and initialization of array variables. Allocation of character string variables. Initialization and possibly repacking of dummy arrays. Initialization of ASSIGN statement auxiliary variable. Initialization of ASSOCIATE names. Automatic deallocation. */ void gfc_trans_deferred_vars (gfc_symbol * proc_sym, gfc_wrapped_block * block) { locus loc; gfc_symbol *sym; gfc_formal_arglist *f; stmtblock_t tmpblock; bool seen_trans_deferred_array = false; tree tmp = NULL; gfc_expr *e; gfc_se se; stmtblock_t init; /* Deal with implicit return variables. Explicit return variables will already have been added. */ if (gfc_return_by_reference (proc_sym) && proc_sym->result == proc_sym) { if (!current_fake_result_decl) { gfc_entry_list *el = NULL; if (proc_sym->attr.entry_master) { for (el = proc_sym->ns->entries; el; el = el->next) if (el->sym != el->sym->result) break; } /* TODO: move to the appropriate place in resolve.c. */ if (warn_return_type && el == NULL) gfc_warning ("Return value of function '%s' at %L not set", proc_sym->name, &proc_sym->declared_at); } else if (proc_sym->as) { tree result = TREE_VALUE (current_fake_result_decl); gfc_trans_dummy_array_bias (proc_sym, result, block); /* An automatic character length, pointer array result. */ if (proc_sym->ts.type == BT_CHARACTER && TREE_CODE (proc_sym->ts.u.cl->backend_decl) == VAR_DECL) gfc_trans_dummy_character (proc_sym, proc_sym->ts.u.cl, block); } else if (proc_sym->ts.type == BT_CHARACTER) { if (proc_sym->ts.deferred) { tmp = NULL; gfc_save_backend_locus (&loc); gfc_set_backend_locus (&proc_sym->declared_at); gfc_start_block (&init); /* Zero the string length on entry. */ gfc_add_modify (&init, proc_sym->ts.u.cl->backend_decl, build_int_cst (gfc_charlen_type_node, 0)); /* Null the pointer. */ e = gfc_lval_expr_from_sym (proc_sym); gfc_init_se (&se, NULL); se.want_pointer = 1; gfc_conv_expr (&se, e); gfc_free_expr (e); tmp = se.expr; gfc_add_modify (&init, tmp, fold_convert (TREE_TYPE (se.expr), null_pointer_node)); gfc_restore_backend_locus (&loc); /* Pass back the string length on exit. */ tmp = proc_sym->ts.u.cl->passed_length; tmp = build_fold_indirect_ref_loc (input_location, tmp); tmp = fold_convert (gfc_charlen_type_node, tmp); tmp = fold_build2_loc (input_location, MODIFY_EXPR, gfc_charlen_type_node, tmp, proc_sym->ts.u.cl->backend_decl); gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp); } else if (TREE_CODE (proc_sym->ts.u.cl->backend_decl) == VAR_DECL) gfc_trans_dummy_character (proc_sym, proc_sym->ts.u.cl, block); } else gcc_assert (gfc_option.flag_f2c && proc_sym->ts.type == BT_COMPLEX); } /* Initialize the INTENT(OUT) derived type dummy arguments. This should be done here so that the offsets and lbounds of arrays are available. */ gfc_save_backend_locus (&loc); gfc_set_backend_locus (&proc_sym->declared_at); init_intent_out_dt (proc_sym, block); gfc_restore_backend_locus (&loc); for (sym = proc_sym->tlink; sym != proc_sym; sym = sym->tlink) { bool sym_has_alloc_comp = (sym->ts.type == BT_DERIVED) && sym->ts.u.derived->attr.alloc_comp; if (sym->assoc) continue; if (sym->attr.subref_array_pointer && GFC_DECL_SPAN (sym->backend_decl) && !TREE_STATIC (GFC_DECL_SPAN (sym->backend_decl))) { gfc_init_block (&tmpblock); gfc_add_modify (&tmpblock, GFC_DECL_SPAN (sym->backend_decl), build_int_cst (gfc_array_index_type, 0)); gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE); } if (sym->attr.dimension || sym->attr.codimension) { /* Assumed-size Cray pointees need to be treated as AS_EXPLICIT. */ array_type tmp = sym->as->type; if (tmp == AS_ASSUMED_SIZE && sym->as->cp_was_assumed) tmp = AS_EXPLICIT; switch (tmp) { case AS_EXPLICIT: if (sym->attr.dummy || sym->attr.result) gfc_trans_dummy_array_bias (sym, sym->backend_decl, block); else if (sym->attr.pointer || sym->attr.allocatable) { if (TREE_STATIC (sym->backend_decl)) { gfc_save_backend_locus (&loc); gfc_set_backend_locus (&sym->declared_at); gfc_trans_static_array_pointer (sym); gfc_restore_backend_locus (&loc); } else { seen_trans_deferred_array = true; gfc_trans_deferred_array (sym, block); } } else if (sym->attr.codimension && TREE_STATIC (sym->backend_decl)) { gfc_init_block (&tmpblock); gfc_trans_array_cobounds (TREE_TYPE (sym->backend_decl), &tmpblock, sym); gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE); continue; } else if (gfc_option.coarray != GFC_FCOARRAY_LIB) { gfc_save_backend_locus (&loc); gfc_set_backend_locus (&sym->declared_at); if (sym_has_alloc_comp) { seen_trans_deferred_array = true; gfc_trans_deferred_array (sym, block); } else if (sym->ts.type == BT_DERIVED && sym->value && !sym->attr.data && sym->attr.save == SAVE_NONE) { gfc_start_block (&tmpblock); gfc_init_default_dt (sym, &tmpblock, false); gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE); } gfc_trans_auto_array_allocation (sym->backend_decl, sym, block); gfc_restore_backend_locus (&loc); } break; case AS_ASSUMED_SIZE: /* Must be a dummy parameter. */ gcc_assert (sym->attr.dummy || sym->as->cp_was_assumed); /* We should always pass assumed size arrays the g77 way. */ if (sym->attr.dummy) gfc_trans_g77_array (sym, block); break; case AS_ASSUMED_SHAPE: /* Must be a dummy parameter. */ gcc_assert (sym->attr.dummy); gfc_trans_dummy_array_bias (sym, sym->backend_decl, block); break; case AS_DEFERRED: seen_trans_deferred_array = true; gfc_trans_deferred_array (sym, block); break; default: gcc_unreachable (); } if (sym_has_alloc_comp && !seen_trans_deferred_array) gfc_trans_deferred_array (sym, block); } else if ((!sym->attr.dummy || sym->ts.deferred) && (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.class_pointer)) continue; else if ((!sym->attr.dummy || sym->ts.deferred) && (sym->attr.allocatable || (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.allocatable))) { if (!sym->attr.save) { tree descriptor = NULL_TREE; /* Nullify and automatic deallocation of allocatable scalars. */ e = gfc_lval_expr_from_sym (sym); if (sym->ts.type == BT_CLASS) gfc_add_data_component (e); gfc_init_se (&se, NULL); if (sym->ts.type != BT_CLASS || sym->ts.u.derived->attr.dimension || sym->ts.u.derived->attr.codimension) { se.want_pointer = 1; gfc_conv_expr (&se, e); } else if (sym->ts.type == BT_CLASS && !CLASS_DATA (sym)->attr.dimension && !CLASS_DATA (sym)->attr.codimension) { se.want_pointer = 1; gfc_conv_expr (&se, e); } else { gfc_conv_expr (&se, e); descriptor = se.expr; se.expr = gfc_conv_descriptor_data_addr (se.expr); se.expr = build_fold_indirect_ref_loc (input_location, se.expr); } gfc_free_expr (e); gfc_save_backend_locus (&loc); gfc_set_backend_locus (&sym->declared_at); gfc_start_block (&init); if (!sym->attr.dummy || sym->attr.intent == INTENT_OUT) { /* Nullify when entering the scope. */ gfc_add_modify (&init, se.expr, fold_convert (TREE_TYPE (se.expr), null_pointer_node)); } if ((sym->attr.dummy ||sym->attr.result) && sym->ts.type == BT_CHARACTER && sym->ts.deferred) { /* Character length passed by reference. */ tmp = sym->ts.u.cl->passed_length; tmp = build_fold_indirect_ref_loc (input_location, tmp); tmp = fold_convert (gfc_charlen_type_node, tmp); if (!sym->attr.dummy || sym->attr.intent == INTENT_OUT) /* Zero the string length when entering the scope. */ gfc_add_modify (&init, sym->ts.u.cl->backend_decl, build_int_cst (gfc_charlen_type_node, 0)); else gfc_add_modify (&init, sym->ts.u.cl->backend_decl, tmp); gfc_restore_backend_locus (&loc); /* Pass the final character length back. */ if (sym->attr.intent != INTENT_IN) tmp = fold_build2_loc (input_location, MODIFY_EXPR, gfc_charlen_type_node, tmp, sym->ts.u.cl->backend_decl); else tmp = NULL_TREE; } else gfc_restore_backend_locus (&loc); /* Deallocate when leaving the scope. Nullifying is not needed. */ if (!sym->attr.result && !sym->attr.dummy) { if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.codimension) tmp = gfc_deallocate_with_status (descriptor, NULL_TREE, NULL_TREE, NULL_TREE, NULL_TREE, true, NULL, true); else tmp = gfc_deallocate_scalar_with_status (se.expr, NULL, true, NULL, sym->ts); } if (sym->ts.type == BT_CLASS) { /* Initialize _vptr to declared type. */ gfc_symbol *vtab = gfc_find_derived_vtab (sym->ts.u.derived); tree rhs; gfc_save_backend_locus (&loc); gfc_set_backend_locus (&sym->declared_at); e = gfc_lval_expr_from_sym (sym); gfc_add_vptr_component (e); gfc_init_se (&se, NULL); se.want_pointer = 1; gfc_conv_expr (&se, e); gfc_free_expr (e); rhs = gfc_build_addr_expr (TREE_TYPE (se.expr), gfc_get_symbol_decl (vtab)); gfc_add_modify (&init, se.expr, rhs); gfc_restore_backend_locus (&loc); } gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp); } } else if (sym->ts.type == BT_CHARACTER && sym->ts.deferred) { tree tmp = NULL; stmtblock_t init; /* If we get to here, all that should be left are pointers. */ gcc_assert (sym->attr.pointer); if (sym->attr.dummy) { gfc_start_block (&init); /* Character length passed by reference. */ tmp = sym->ts.u.cl->passed_length; tmp = build_fold_indirect_ref_loc (input_location, tmp); tmp = fold_convert (gfc_charlen_type_node, tmp); gfc_add_modify (&init, sym->ts.u.cl->backend_decl, tmp); /* Pass the final character length back. */ if (sym->attr.intent != INTENT_IN) tmp = fold_build2_loc (input_location, MODIFY_EXPR, gfc_charlen_type_node, tmp, sym->ts.u.cl->backend_decl); else tmp = NULL_TREE; gfc_add_init_cleanup (block, gfc_finish_block (&init), tmp); } } else if (sym->ts.deferred) gfc_fatal_error ("Deferred type parameter not yet supported"); else if (sym_has_alloc_comp) gfc_trans_deferred_array (sym, block); else if (sym->ts.type == BT_CHARACTER) { gfc_save_backend_locus (&loc); gfc_set_backend_locus (&sym->declared_at); if (sym->attr.dummy || sym->attr.result) gfc_trans_dummy_character (sym, sym->ts.u.cl, block); else gfc_trans_auto_character_variable (sym, block); gfc_restore_backend_locus (&loc); } else if (sym->attr.assign) { gfc_save_backend_locus (&loc); gfc_set_backend_locus (&sym->declared_at); gfc_trans_assign_aux_var (sym, block); gfc_restore_backend_locus (&loc); } else if (sym->ts.type == BT_DERIVED && sym->value && !sym->attr.data && sym->attr.save == SAVE_NONE) { gfc_start_block (&tmpblock); gfc_init_default_dt (sym, &tmpblock, false); gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE); } else gcc_unreachable (); } gfc_init_block (&tmpblock); for (f = proc_sym->formal; f; f = f->next) { if (f->sym && f->sym->tlink == NULL && f->sym->ts.type == BT_CHARACTER) { gcc_assert (f->sym->ts.u.cl->backend_decl != NULL); if (TREE_CODE (f->sym->ts.u.cl->backend_decl) == PARM_DECL) gfc_trans_vla_type_sizes (f->sym, &tmpblock); } } if (gfc_return_by_reference (proc_sym) && proc_sym->ts.type == BT_CHARACTER && current_fake_result_decl != NULL) { gcc_assert (proc_sym->ts.u.cl->backend_decl != NULL); if (TREE_CODE (proc_sym->ts.u.cl->backend_decl) == PARM_DECL) gfc_trans_vla_type_sizes (proc_sym, &tmpblock); } gfc_add_init_cleanup (block, gfc_finish_block (&tmpblock), NULL_TREE); } static GTY ((param_is (struct module_htab_entry))) htab_t module_htab; /* Hash and equality functions for module_htab. */ static hashval_t module_htab_do_hash (const void *x) { return htab_hash_string (((const struct module_htab_entry *)x)->name); } static int module_htab_eq (const void *x1, const void *x2) { return strcmp ((((const struct module_htab_entry *)x1)->name), (const char *)x2) == 0; } /* Hash and equality functions for module_htab's decls. */ static hashval_t module_htab_decls_hash (const void *x) { const_tree t = (const_tree) x; const_tree n = DECL_NAME (t); if (n == NULL_TREE) n = TYPE_NAME (TREE_TYPE (t)); return htab_hash_string (IDENTIFIER_POINTER (n)); } static int module_htab_decls_eq (const void *x1, const void *x2) { const_tree t1 = (const_tree) x1; const_tree n1 = DECL_NAME (t1); if (n1 == NULL_TREE) n1 = TYPE_NAME (TREE_TYPE (t1)); return strcmp (IDENTIFIER_POINTER (n1), (const char *) x2) == 0; } struct module_htab_entry * gfc_find_module (const char *name) { void **slot; if (! module_htab) module_htab = htab_create_ggc (10, module_htab_do_hash, module_htab_eq, NULL); slot = htab_find_slot_with_hash (module_htab, name, htab_hash_string (name), INSERT); if (*slot == NULL) { struct module_htab_entry *entry = ggc_alloc_cleared_module_htab_entry (); entry->name = gfc_get_string (name); entry->decls = htab_create_ggc (10, module_htab_decls_hash, module_htab_decls_eq, NULL); *slot = (void *) entry; } return (struct module_htab_entry *) *slot; } void gfc_module_add_decl (struct module_htab_entry *entry, tree decl) { void **slot; const char *name; if (DECL_NAME (decl)) name = IDENTIFIER_POINTER (DECL_NAME (decl)); else { gcc_assert (TREE_CODE (decl) == TYPE_DECL); name = IDENTIFIER_POINTER (TYPE_NAME (TREE_TYPE (decl))); } slot = htab_find_slot_with_hash (entry->decls, name, htab_hash_string (name), INSERT); if (*slot == NULL) *slot = (void *) decl; } static struct module_htab_entry *cur_module; /* Output an initialized decl for a module variable. */ static void gfc_create_module_variable (gfc_symbol * sym) { tree decl; /* Module functions with alternate entries are dealt with later and would get caught by the next condition. */ if (sym->attr.entry) return; /* Make sure we convert the types of the derived types from iso_c_binding into (void *). */ if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c && sym->ts.type == BT_DERIVED) sym->backend_decl = gfc_typenode_for_spec (&(sym->ts)); if (sym->attr.flavor == FL_DERIVED && sym->backend_decl && TREE_CODE (sym->backend_decl) == RECORD_TYPE) { decl = sym->backend_decl; gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE); /* -fwhole-file mixes up the contexts so these asserts are unnecessary. */ if (!(gfc_option.flag_whole_file && sym->attr.use_assoc)) { gcc_assert (TYPE_CONTEXT (decl) == NULL_TREE || TYPE_CONTEXT (decl) == sym->ns->proc_name->backend_decl); gcc_assert (DECL_CONTEXT (TYPE_STUB_DECL (decl)) == NULL_TREE || DECL_CONTEXT (TYPE_STUB_DECL (decl)) == sym->ns->proc_name->backend_decl); } TYPE_CONTEXT (decl) = sym->ns->proc_name->backend_decl; DECL_CONTEXT (TYPE_STUB_DECL (decl)) = sym->ns->proc_name->backend_decl; gfc_module_add_decl (cur_module, TYPE_STUB_DECL (decl)); } /* Only output variables, procedure pointers and array valued, or derived type, parameters. */ if (sym->attr.flavor != FL_VARIABLE && !(sym->attr.flavor == FL_PARAMETER && (sym->attr.dimension || sym->ts.type == BT_DERIVED)) && !(sym->attr.flavor == FL_PROCEDURE && sym->attr.proc_pointer)) return; if ((sym->attr.in_common || sym->attr.in_equivalence) && sym->backend_decl) { decl = sym->backend_decl; gcc_assert (DECL_FILE_SCOPE_P (decl)); gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE); DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl; gfc_module_add_decl (cur_module, decl); } /* Don't generate variables from other modules. Variables from COMMONs will already have been generated. */ if (sym->attr.use_assoc || sym->attr.in_common) return; /* Equivalenced variables arrive here after creation. */ if (sym->backend_decl && (sym->equiv_built || sym->attr.in_equivalence)) return; if (sym->backend_decl && !sym->attr.vtab && !sym->attr.target) internal_error ("backend decl for module variable %s already exists", sym->name); /* We always want module variables to be created. */ sym->attr.referenced = 1; /* Create the decl. */ decl = gfc_get_symbol_decl (sym); /* Create the variable. */ pushdecl (decl); gcc_assert (sym->ns->proc_name->attr.flavor == FL_MODULE); DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl; rest_of_decl_compilation (decl, 1, 0); gfc_module_add_decl (cur_module, decl); /* Also add length of strings. */ if (sym->ts.type == BT_CHARACTER) { tree length; length = sym->ts.u.cl->backend_decl; gcc_assert (length || sym->attr.proc_pointer); if (length && !INTEGER_CST_P (length)) { pushdecl (length); rest_of_decl_compilation (length, 1, 0); } } if (sym->attr.codimension && !sym->attr.dummy && !sym->attr.allocatable && sym->attr.referenced && !sym->attr.use_assoc) has_coarray_vars = true; } /* Emit debug information for USE statements. */ static void gfc_trans_use_stmts (gfc_namespace * ns) { gfc_use_list *use_stmt; for (use_stmt = ns->use_stmts; use_stmt; use_stmt = use_stmt->next) { struct module_htab_entry *entry = gfc_find_module (use_stmt->module_name); gfc_use_rename *rent; if (entry->namespace_decl == NULL) { entry->namespace_decl = build_decl (input_location, NAMESPACE_DECL, get_identifier (use_stmt->module_name), void_type_node); DECL_EXTERNAL (entry->namespace_decl) = 1; } gfc_set_backend_locus (&use_stmt->where); if (!use_stmt->only_flag) (*debug_hooks->imported_module_or_decl) (entry->namespace_decl, NULL_TREE, ns->proc_name->backend_decl, false); for (rent = use_stmt->rename; rent; rent = rent->next) { tree decl, local_name; void **slot; if (rent->op != INTRINSIC_NONE) continue; slot = htab_find_slot_with_hash (entry->decls, rent->use_name, htab_hash_string (rent->use_name), INSERT); if (*slot == NULL) { gfc_symtree *st; st = gfc_find_symtree (ns->sym_root, rent->local_name[0] ? rent->local_name : rent->use_name); /* The following can happen if a derived type is renamed. */ if (!st) { char *name; name = xstrdup (rent->local_name[0] ? rent->local_name : rent->use_name); name[0] = (char) TOUPPER ((unsigned char) name[0]); st = gfc_find_symtree (ns->sym_root, name); free (name); gcc_assert (st); } /* Sometimes, generic interfaces wind up being over-ruled by a local symbol (see PR41062). */ if (!st->n.sym->attr.use_assoc) continue; if (st->n.sym->backend_decl && DECL_P (st->n.sym->backend_decl) && st->n.sym->module && strcmp (st->n.sym->module, use_stmt->module_name) == 0) { gcc_assert (DECL_EXTERNAL (entry->namespace_decl) || (TREE_CODE (st->n.sym->backend_decl) != VAR_DECL)); decl = copy_node (st->n.sym->backend_decl); DECL_CONTEXT (decl) = entry->namespace_decl; DECL_EXTERNAL (decl) = 1; DECL_IGNORED_P (decl) = 0; DECL_INITIAL (decl) = NULL_TREE; } else { *slot = error_mark_node; htab_clear_slot (entry->decls, slot); continue; } *slot = decl; } decl = (tree) *slot; if (rent->local_name[0]) local_name = get_identifier (rent->local_name); else local_name = NULL_TREE; gfc_set_backend_locus (&rent->where); (*debug_hooks->imported_module_or_decl) (decl, local_name, ns->proc_name->backend_decl, !use_stmt->only_flag); } } } /* Return true if expr is a constant initializer that gfc_conv_initializer will handle. */ static bool check_constant_initializer (gfc_expr *expr, gfc_typespec *ts, bool array, bool pointer) { gfc_constructor *c; gfc_component *cm; if (pointer) return true; else if (array) { if (expr->expr_type == EXPR_CONSTANT || expr->expr_type == EXPR_NULL) return true; else if (expr->expr_type == EXPR_STRUCTURE) return check_constant_initializer (expr, ts, false, false); else if (expr->expr_type != EXPR_ARRAY) return false; for (c = gfc_constructor_first (expr->value.constructor); c; c = gfc_constructor_next (c)) { if (c->iterator) return false; if (c->expr->expr_type == EXPR_STRUCTURE) { if (!check_constant_initializer (c->expr, ts, false, false)) return false; } else if (c->expr->expr_type != EXPR_CONSTANT) return false; } return true; } else switch (ts->type) { case BT_DERIVED: if (expr->expr_type != EXPR_STRUCTURE) return false; cm = expr->ts.u.derived->components; for (c = gfc_constructor_first (expr->value.constructor); c; c = gfc_constructor_next (c), cm = cm->next) { if (!c->expr || cm->attr.allocatable) continue; if (!check_constant_initializer (c->expr, &cm->ts, cm->attr.dimension, cm->attr.pointer)) return false; } return true; default: return expr->expr_type == EXPR_CONSTANT; } } /* Emit debug info for parameters and unreferenced variables with initializers. */ static void gfc_emit_parameter_debug_info (gfc_symbol *sym) { tree decl; if (sym->attr.flavor != FL_PARAMETER && (sym->attr.flavor != FL_VARIABLE || sym->attr.referenced)) return; if (sym->backend_decl != NULL || sym->value == NULL || sym->attr.use_assoc || sym->attr.dummy || sym->attr.result || sym->attr.function || sym->attr.intrinsic || sym->attr.pointer || sym->attr.allocatable || sym->attr.cray_pointee || sym->attr.threadprivate || sym->attr.is_bind_c || sym->attr.subref_array_pointer || sym->attr.assign) return; if (sym->ts.type == BT_CHARACTER) { gfc_conv_const_charlen (sym->ts.u.cl); if (sym->ts.u.cl->backend_decl == NULL || TREE_CODE (sym->ts.u.cl->backend_decl) != INTEGER_CST) return; } else if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.alloc_comp) return; if (sym->as) { int n; if (sym->as->type != AS_EXPLICIT) return; for (n = 0; n < sym->as->rank; n++) if (sym->as->lower[n]->expr_type != EXPR_CONSTANT || sym->as->upper[n] == NULL || sym->as->upper[n]->expr_type != EXPR_CONSTANT) return; } if (!check_constant_initializer (sym->value, &sym->ts, sym->attr.dimension, false)) return; if (gfc_option.coarray == GFC_FCOARRAY_LIB && sym->attr.codimension) return; /* Create the decl for the variable or constant. */ decl = build_decl (input_location, sym->attr.flavor == FL_PARAMETER ? CONST_DECL : VAR_DECL, gfc_sym_identifier (sym), gfc_sym_type (sym)); if (sym->attr.flavor == FL_PARAMETER) TREE_READONLY (decl) = 1; gfc_set_decl_location (decl, &sym->declared_at); if (sym->attr.dimension) GFC_DECL_PACKED_ARRAY (decl) = 1; DECL_CONTEXT (decl) = sym->ns->proc_name->backend_decl; TREE_STATIC (decl) = 1; TREE_USED (decl) = 1; if (DECL_CONTEXT (decl) && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL) TREE_PUBLIC (decl) = 1; DECL_INITIAL (decl) = gfc_conv_initializer (sym->value, &sym->ts, TREE_TYPE (decl), sym->attr.dimension, false, false); debug_hooks->global_decl (decl); } static void generate_coarray_sym_init (gfc_symbol *sym) { tree tmp, size, decl, token; if (sym->attr.dummy || sym->attr.allocatable || !sym->attr.codimension || sym->attr.use_assoc || !sym->attr.referenced) return; decl = sym->backend_decl; TREE_USED(decl) = 1; gcc_assert (GFC_ARRAY_TYPE_P (TREE_TYPE (decl))); /* FIXME: Workaround for PR middle-end/49106, cf. also PR middle-end/49108 to make sure the variable is not optimized away. */ DECL_PRESERVE_P (DECL_CONTEXT (decl)) = 1; size = TYPE_SIZE_UNIT (gfc_get_element_type (TREE_TYPE (decl))); /* Ensure that we do not have size=0 for zero-sized arrays. */ size = fold_build2_loc (input_location, MAX_EXPR, size_type_node, fold_convert (size_type_node, size), build_int_cst (size_type_node, 1)); if (GFC_TYPE_ARRAY_RANK (TREE_TYPE (decl))) { tmp = GFC_TYPE_ARRAY_SIZE (TREE_TYPE (decl)); size = fold_build2_loc (input_location, MULT_EXPR, size_type_node, fold_convert (size_type_node, tmp), size); } gcc_assert (GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE (decl)) != NULL_TREE); token = gfc_build_addr_expr (ppvoid_type_node, GFC_TYPE_ARRAY_CAF_TOKEN (TREE_TYPE(decl))); tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_register, 6, size, build_int_cst (integer_type_node, GFC_CAF_COARRAY_STATIC), /* type. */ token, null_pointer_node, /* token, stat. */ null_pointer_node, /* errgmsg, errmsg_len. */ build_int_cst (integer_type_node, 0)); gfc_add_modify (&caf_init_block, decl, fold_convert (TREE_TYPE (decl), tmp)); /* Handle "static" initializer. */ if (sym->value) { sym->attr.pointer = 1; tmp = gfc_trans_assignment (gfc_lval_expr_from_sym (sym), sym->value, true, false); sym->attr.pointer = 0; gfc_add_expr_to_block (&caf_init_block, tmp); } } /* Generate constructor function to initialize static, nonallocatable coarrays. */ static void generate_coarray_init (gfc_namespace * ns __attribute((unused))) { tree fndecl, tmp, decl, save_fn_decl; save_fn_decl = current_function_decl; push_function_context (); tmp = build_function_type_list (void_type_node, NULL_TREE); fndecl = build_decl (input_location, FUNCTION_DECL, create_tmp_var_name ("_caf_init"), tmp); DECL_STATIC_CONSTRUCTOR (fndecl) = 1; SET_DECL_INIT_PRIORITY (fndecl, DEFAULT_INIT_PRIORITY); decl = build_decl (input_location, RESULT_DECL, NULL_TREE, void_type_node); DECL_ARTIFICIAL (decl) = 1; DECL_IGNORED_P (decl) = 1; DECL_CONTEXT (decl) = fndecl; DECL_RESULT (fndecl) = decl; pushdecl (fndecl); current_function_decl = fndecl; announce_function (fndecl); rest_of_decl_compilation (fndecl, 0, 0); make_decl_rtl (fndecl); init_function_start (fndecl); pushlevel (0); gfc_init_block (&caf_init_block); gfc_traverse_ns (ns, generate_coarray_sym_init); DECL_SAVED_TREE (fndecl) = gfc_finish_block (&caf_init_block); decl = getdecls (); poplevel (1, 0, 1); BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; DECL_SAVED_TREE (fndecl) = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl), DECL_INITIAL (fndecl)); dump_function (TDI_original, fndecl); cfun->function_end_locus = input_location; set_cfun (NULL); if (decl_function_context (fndecl)) (void) cgraph_create_node (fndecl); else cgraph_finalize_function (fndecl, true); pop_function_context (); current_function_decl = save_fn_decl; } /* Generate all the required code for module variables. */ void gfc_generate_module_vars (gfc_namespace * ns) { module_namespace = ns; cur_module = gfc_find_module (ns->proc_name->name); /* Check if the frontend left the namespace in a reasonable state. */ gcc_assert (ns->proc_name && !ns->proc_name->tlink); /* Generate COMMON blocks. */ gfc_trans_common (ns); has_coarray_vars = false; /* Create decls for all the module variables. */ gfc_traverse_ns (ns, gfc_create_module_variable); if (gfc_option.coarray == GFC_FCOARRAY_LIB && has_coarray_vars) generate_coarray_init (ns); cur_module = NULL; gfc_trans_use_stmts (ns); gfc_traverse_ns (ns, gfc_emit_parameter_debug_info); } static void gfc_generate_contained_functions (gfc_namespace * parent) { gfc_namespace *ns; /* We create all the prototypes before generating any code. */ for (ns = parent->contained; ns; ns = ns->sibling) { /* Skip namespaces from used modules. */ if (ns->parent != parent) continue; gfc_create_function_decl (ns, false); } for (ns = parent->contained; ns; ns = ns->sibling) { /* Skip namespaces from used modules. */ if (ns->parent != parent) continue; gfc_generate_function_code (ns); } } /* Drill down through expressions for the array specification bounds and character length calling generate_local_decl for all those variables that have not already been declared. */ static void generate_local_decl (gfc_symbol *); /* Traverse expr, marking all EXPR_VARIABLE symbols referenced. */ static bool expr_decls (gfc_expr *e, gfc_symbol *sym, int *f ATTRIBUTE_UNUSED) { if (e->expr_type != EXPR_VARIABLE || sym == e->symtree->n.sym || e->symtree->n.sym->mark || e->symtree->n.sym->ns != sym->ns) return false; generate_local_decl (e->symtree->n.sym); return false; } static void generate_expr_decls (gfc_symbol *sym, gfc_expr *e) { gfc_traverse_expr (e, sym, expr_decls, 0); } /* Check for dependencies in the character length and array spec. */ static void generate_dependency_declarations (gfc_symbol *sym) { int i; if (sym->ts.type == BT_CHARACTER && sym->ts.u.cl && sym->ts.u.cl->length && sym->ts.u.cl->length->expr_type != EXPR_CONSTANT) generate_expr_decls (sym, sym->ts.u.cl->length); if (sym->as && sym->as->rank) { for (i = 0; i < sym->as->rank; i++) { generate_expr_decls (sym, sym->as->lower[i]); generate_expr_decls (sym, sym->as->upper[i]); } } } /* Generate decls for all local variables. We do this to ensure correct handling of expressions which only appear in the specification of other functions. */ static void generate_local_decl (gfc_symbol * sym) { if (sym->attr.flavor == FL_VARIABLE) { if (sym->attr.codimension && !sym->attr.dummy && !sym->attr.allocatable && sym->attr.referenced && !sym->attr.use_assoc) has_coarray_vars = true; if (!sym->attr.dummy && !sym->ns->proc_name->attr.entry_master) generate_dependency_declarations (sym); if (sym->attr.referenced) gfc_get_symbol_decl (sym); /* Warnings for unused dummy arguments. */ else if (sym->attr.dummy) { /* INTENT(out) dummy arguments are likely meant to be set. */ if (gfc_option.warn_unused_dummy_argument && sym->attr.intent == INTENT_OUT) { if (sym->ts.type != BT_DERIVED) gfc_warning ("Dummy argument '%s' at %L was declared " "INTENT(OUT) but was not set", sym->name, &sym->declared_at); else if (!gfc_has_default_initializer (sym->ts.u.derived)) gfc_warning ("Derived-type dummy argument '%s' at %L was " "declared INTENT(OUT) but was not set and " "does not have a default initializer", sym->name, &sym->declared_at); if (sym->backend_decl != NULL_TREE) TREE_NO_WARNING(sym->backend_decl) = 1; } else if (gfc_option.warn_unused_dummy_argument) { gfc_warning ("Unused dummy argument '%s' at %L", sym->name, &sym->declared_at); if (sym->backend_decl != NULL_TREE) TREE_NO_WARNING(sym->backend_decl) = 1; } } /* Warn for unused variables, but not if they're inside a common block, a namelist, or are use-associated. */ else if (warn_unused_variable && !(sym->attr.in_common || sym->attr.use_assoc || sym->mark || sym->attr.in_namelist)) { gfc_warning ("Unused variable '%s' declared at %L", sym->name, &sym->declared_at); if (sym->backend_decl != NULL_TREE) TREE_NO_WARNING(sym->backend_decl) = 1; } else if (warn_unused_variable && sym->attr.use_only) { gfc_warning ("Unused module variable '%s' which has been explicitly " "imported at %L", sym->name, &sym->declared_at); if (sym->backend_decl != NULL_TREE) TREE_NO_WARNING(sym->backend_decl) = 1; } /* For variable length CHARACTER parameters, the PARM_DECL already references the length variable, so force gfc_get_symbol_decl even when not referenced. If optimize > 0, it will be optimized away anyway. But do this only after emitting -Wunused-parameter warning if requested. */ if (sym->attr.dummy && !sym->attr.referenced && sym->ts.type == BT_CHARACTER && sym->ts.u.cl->backend_decl != NULL && TREE_CODE (sym->ts.u.cl->backend_decl) == VAR_DECL) { sym->attr.referenced = 1; gfc_get_symbol_decl (sym); } /* INTENT(out) dummy arguments and result variables with allocatable components are reset by default and need to be set referenced to generate the code for nullification and automatic lengths. */ if (!sym->attr.referenced && sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.alloc_comp && !sym->attr.pointer && ((sym->attr.dummy && sym->attr.intent == INTENT_OUT) || (sym->attr.result && sym != sym->result))) { sym->attr.referenced = 1; gfc_get_symbol_decl (sym); } /* Check for dependencies in the array specification and string length, adding the necessary declarations to the function. We mark the symbol now, as well as in traverse_ns, to prevent getting stuck in a circular dependency. */ sym->mark = 1; } else if (sym->attr.flavor == FL_PARAMETER) { if (warn_unused_parameter && !sym->attr.referenced) { if (!sym->attr.use_assoc) gfc_warning ("Unused parameter '%s' declared at %L", sym->name, &sym->declared_at); else if (sym->attr.use_only) gfc_warning ("Unused parameter '%s' which has been explicitly " "imported at %L", sym->name, &sym->declared_at); } } else if (sym->attr.flavor == FL_PROCEDURE) { /* TODO: move to the appropriate place in resolve.c. */ if (warn_return_type && sym->attr.function && sym->result && sym != sym->result && !sym->result->attr.referenced && !sym->attr.use_assoc && sym->attr.if_source != IFSRC_IFBODY) { gfc_warning ("Return value '%s' of function '%s' declared at " "%L not set", sym->result->name, sym->name, &sym->result->declared_at); /* Prevents "Unused variable" warning for RESULT variables. */ sym->result->mark = 1; } } if (sym->attr.dummy == 1) { /* Modify the tree type for scalar character dummy arguments of bind(c) procedures if they are passed by value. The tree type for them will be promoted to INTEGER_TYPE for the middle end, which appears to be what C would do with characters passed by-value. The value attribute implies the dummy is a scalar. */ if (sym->attr.value == 1 && sym->backend_decl != NULL && sym->ts.type == BT_CHARACTER && sym->ts.is_c_interop && sym->ns->proc_name != NULL && sym->ns->proc_name->attr.is_bind_c) gfc_conv_scalar_char_value (sym, NULL, NULL); /* Unused procedure passed as dummy argument. */ if (sym->attr.flavor == FL_PROCEDURE) { if (!sym->attr.referenced) { if (gfc_option.warn_unused_dummy_argument) gfc_warning ("Unused dummy argument '%s' at %L", sym->name, &sym->declared_at); } /* Silence bogus "unused parameter" warnings from the middle end. */ if (sym->backend_decl != NULL_TREE) TREE_NO_WARNING (sym->backend_decl) = 1; } } /* Make sure we convert the types of the derived types from iso_c_binding into (void *). */ if (sym->attr.flavor != FL_PROCEDURE && sym->attr.is_iso_c && sym->ts.type == BT_DERIVED) sym->backend_decl = gfc_typenode_for_spec (&(sym->ts)); } static void generate_local_vars (gfc_namespace * ns) { gfc_traverse_ns (ns, generate_local_decl); } /* Generate a switch statement to jump to the correct entry point. Also creates the label decls for the entry points. */ static tree gfc_trans_entry_master_switch (gfc_entry_list * el) { stmtblock_t block; tree label; tree tmp; tree val; gfc_init_block (&block); for (; el; el = el->next) { /* Add the case label. */ label = gfc_build_label_decl (NULL_TREE); val = build_int_cst (gfc_array_index_type, el->id); tmp = build_case_label (val, NULL_TREE, label); gfc_add_expr_to_block (&block, tmp); /* And jump to the actual entry point. */ label = gfc_build_label_decl (NULL_TREE); tmp = build1_v (GOTO_EXPR, label); gfc_add_expr_to_block (&block, tmp); /* Save the label decl. */ el->label = label; } tmp = gfc_finish_block (&block); /* The first argument selects the entry point. */ val = DECL_ARGUMENTS (current_function_decl); tmp = build3_v (SWITCH_EXPR, val, tmp, NULL_TREE); return tmp; } /* Add code to string lengths of actual arguments passed to a function against the expected lengths of the dummy arguments. */ static void add_argument_checking (stmtblock_t *block, gfc_symbol *sym) { gfc_formal_arglist *formal; for (formal = sym->formal; formal; formal = formal->next) if (formal->sym && formal->sym->ts.type == BT_CHARACTER && !formal->sym->ts.deferred) { enum tree_code comparison; tree cond; tree argname; gfc_symbol *fsym; gfc_charlen *cl; const char *message; fsym = formal->sym; cl = fsym->ts.u.cl; gcc_assert (cl); gcc_assert (cl->passed_length != NULL_TREE); gcc_assert (cl->backend_decl != NULL_TREE); /* For POINTER, ALLOCATABLE and assumed-shape dummy arguments, the string lengths must match exactly. Otherwise, it is only required that the actual string length is *at least* the expected one. Sequence association allows for a mismatch of the string length if the actual argument is (part of) an array, but only if the dummy argument is an array. (See "Sequence association" in Section 12.4.1.4 for F95 and 12.4.1.5 for F2003.) */ if (fsym->attr.pointer || fsym->attr.allocatable || (fsym->as && fsym->as->type == AS_ASSUMED_SHAPE)) { comparison = NE_EXPR; message = _("Actual string length does not match the declared one" " for dummy argument '%s' (%ld/%ld)"); } else if (fsym->as && fsym->as->rank != 0) continue; else { comparison = LT_EXPR; message = _("Actual string length is shorter than the declared one" " for dummy argument '%s' (%ld/%ld)"); } /* Build the condition. For optional arguments, an actual length of 0 is also acceptable if the associated string is NULL, which means the argument was not passed. */ cond = fold_build2_loc (input_location, comparison, boolean_type_node, cl->passed_length, cl->backend_decl); if (fsym->attr.optional) { tree not_absent; tree not_0length; tree absent_failed; not_0length = fold_build2_loc (input_location, NE_EXPR, boolean_type_node, cl->passed_length, build_zero_cst (gfc_charlen_type_node)); /* The symbol needs to be referenced for gfc_get_symbol_decl. */ fsym->attr.referenced = 1; not_absent = gfc_conv_expr_present (fsym); absent_failed = fold_build2_loc (input_location, TRUTH_OR_EXPR, boolean_type_node, not_0length, not_absent); cond = fold_build2_loc (input_location, TRUTH_AND_EXPR, boolean_type_node, cond, absent_failed); } /* Build the runtime check. */ argname = gfc_build_cstring_const (fsym->name); argname = gfc_build_addr_expr (pchar_type_node, argname); gfc_trans_runtime_check (true, false, cond, block, &fsym->declared_at, message, argname, fold_convert (long_integer_type_node, cl->passed_length), fold_convert (long_integer_type_node, cl->backend_decl)); } } /* Generate the _gfortran_caf_this_image and _gfortran_caf_num_images global variables for -fcoarray=lib. They are placed into the translation unit of the main program. Make sure that in one TU (the one of the main program), the first call to gfc_init_coarray_decl is done with true. Otherwise, expect link errors. */ void gfc_init_coarray_decl (bool main_tu) { tree save_fn_decl; if (gfc_option.coarray != GFC_FCOARRAY_LIB) return; if (gfort_gvar_caf_this_image || gfort_gvar_caf_num_images) return; save_fn_decl = current_function_decl; current_function_decl = NULL_TREE; push_cfun (cfun); gfort_gvar_caf_this_image = build_decl (input_location, VAR_DECL, get_identifier (PREFIX("caf_this_image")), integer_type_node); DECL_ARTIFICIAL (gfort_gvar_caf_this_image) = 1; TREE_USED (gfort_gvar_caf_this_image) = 1; TREE_PUBLIC (gfort_gvar_caf_this_image) = 1; TREE_READONLY (gfort_gvar_caf_this_image) = 0; if (main_tu) TREE_STATIC (gfort_gvar_caf_this_image) = 1; else DECL_EXTERNAL (gfort_gvar_caf_this_image) = 1; pushdecl_top_level (gfort_gvar_caf_this_image); gfort_gvar_caf_num_images = build_decl (input_location, VAR_DECL, get_identifier (PREFIX("caf_num_images")), integer_type_node); DECL_ARTIFICIAL (gfort_gvar_caf_num_images) = 1; TREE_USED (gfort_gvar_caf_num_images) = 1; TREE_PUBLIC (gfort_gvar_caf_num_images) = 1; TREE_READONLY (gfort_gvar_caf_num_images) = 0; if (main_tu) TREE_STATIC (gfort_gvar_caf_num_images) = 1; else DECL_EXTERNAL (gfort_gvar_caf_num_images) = 1; pushdecl_top_level (gfort_gvar_caf_num_images); pop_cfun (); current_function_decl = save_fn_decl; } static void create_main_function (tree fndecl) { tree old_context; tree ftn_main; tree tmp, decl, result_decl, argc, argv, typelist, arglist; stmtblock_t body; old_context = current_function_decl; if (old_context) { push_function_context (); saved_parent_function_decls = saved_function_decls; saved_function_decls = NULL_TREE; } /* main() function must be declared with global scope. */ gcc_assert (current_function_decl == NULL_TREE); /* Declare the function. */ tmp = build_function_type_list (integer_type_node, integer_type_node, build_pointer_type (pchar_type_node), NULL_TREE); main_identifier_node = get_identifier ("main"); ftn_main = build_decl (input_location, FUNCTION_DECL, main_identifier_node, tmp); DECL_EXTERNAL (ftn_main) = 0; TREE_PUBLIC (ftn_main) = 1; TREE_STATIC (ftn_main) = 1; DECL_ATTRIBUTES (ftn_main) = tree_cons (get_identifier("externally_visible"), NULL_TREE, NULL_TREE); /* Setup the result declaration (for "return 0"). */ result_decl = build_decl (input_location, RESULT_DECL, NULL_TREE, integer_type_node); DECL_ARTIFICIAL (result_decl) = 1; DECL_IGNORED_P (result_decl) = 1; DECL_CONTEXT (result_decl) = ftn_main; DECL_RESULT (ftn_main) = result_decl; pushdecl (ftn_main); /* Get the arguments. */ arglist = NULL_TREE; typelist = TYPE_ARG_TYPES (TREE_TYPE (ftn_main)); tmp = TREE_VALUE (typelist); argc = build_decl (input_location, PARM_DECL, get_identifier ("argc"), tmp); DECL_CONTEXT (argc) = ftn_main; DECL_ARG_TYPE (argc) = TREE_VALUE (typelist); TREE_READONLY (argc) = 1; gfc_finish_decl (argc); arglist = chainon (arglist, argc); typelist = TREE_CHAIN (typelist); tmp = TREE_VALUE (typelist); argv = build_decl (input_location, PARM_DECL, get_identifier ("argv"), tmp); DECL_CONTEXT (argv) = ftn_main; DECL_ARG_TYPE (argv) = TREE_VALUE (typelist); TREE_READONLY (argv) = 1; DECL_BY_REFERENCE (argv) = 1; gfc_finish_decl (argv); arglist = chainon (arglist, argv); DECL_ARGUMENTS (ftn_main) = arglist; current_function_decl = ftn_main; announce_function (ftn_main); rest_of_decl_compilation (ftn_main, 1, 0); make_decl_rtl (ftn_main); init_function_start (ftn_main); pushlevel (0); gfc_init_block (&body); /* Call some libgfortran initialization routines, call then MAIN__(). */ /* Call _gfortran_caf_init (*argc, ***argv, *this_image, *num_images). */ if (gfc_option.coarray == GFC_FCOARRAY_LIB) { tree pint_type, pppchar_type; pint_type = build_pointer_type (integer_type_node); pppchar_type = build_pointer_type (build_pointer_type (pchar_type_node)); gfc_init_coarray_decl (true); tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_init, 4, gfc_build_addr_expr (pint_type, argc), gfc_build_addr_expr (pppchar_type, argv), gfc_build_addr_expr (pint_type, gfort_gvar_caf_this_image), gfc_build_addr_expr (pint_type, gfort_gvar_caf_num_images)); gfc_add_expr_to_block (&body, tmp); } /* Call _gfortran_set_args (argc, argv). */ TREE_USED (argc) = 1; TREE_USED (argv) = 1; tmp = build_call_expr_loc (input_location, gfor_fndecl_set_args, 2, argc, argv); gfc_add_expr_to_block (&body, tmp); /* Add a call to set_options to set up the runtime library Fortran language standard parameters. */ { tree array_type, array, var; VEC(constructor_elt,gc) *v = NULL; /* Passing a new option to the library requires four modifications: + add it to the tree_cons list below + change the array size in the call to build_array_type + change the first argument to the library call gfor_fndecl_set_options + modify the library (runtime/compile_options.c)! */ CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, gfc_option.warn_std)); CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, gfc_option.allow_std)); CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, pedantic)); /* TODO: This is the old -fdump-core option, which is unused but passed due to ABI compatibility; remove when bumping the library ABI. */ CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, 0)); CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, gfc_option.flag_backtrace)); CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, gfc_option.flag_sign_zero)); CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS))); CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, build_int_cst (integer_type_node, gfc_option.flag_range_check)); array_type = build_array_type (integer_type_node, build_index_type (size_int (7))); array = build_constructor (array_type, v); TREE_CONSTANT (array) = 1; TREE_STATIC (array) = 1; /* Create a static variable to hold the jump table. */ var = gfc_create_var (array_type, "options"); TREE_CONSTANT (var) = 1; TREE_STATIC (var) = 1; TREE_READONLY (var) = 1; DECL_INITIAL (var) = array; var = gfc_build_addr_expr (build_pointer_type (integer_type_node), var); tmp = build_call_expr_loc (input_location, gfor_fndecl_set_options, 2, build_int_cst (integer_type_node, 8), var); gfc_add_expr_to_block (&body, tmp); } /* If -ffpe-trap option was provided, add a call to set_fpe so that the library will raise a FPE when needed. */ if (gfc_option.fpe != 0) { tmp = build_call_expr_loc (input_location, gfor_fndecl_set_fpe, 1, build_int_cst (integer_type_node, gfc_option.fpe)); gfc_add_expr_to_block (&body, tmp); } /* If this is the main program and an -fconvert option was provided, add a call to set_convert. */ if (gfc_option.convert != GFC_CONVERT_NATIVE) { tmp = build_call_expr_loc (input_location, gfor_fndecl_set_convert, 1, build_int_cst (integer_type_node, gfc_option.convert)); gfc_add_expr_to_block (&body, tmp); } /* If this is the main program and an -frecord-marker option was provided, add a call to set_record_marker. */ if (gfc_option.record_marker != 0) { tmp = build_call_expr_loc (input_location, gfor_fndecl_set_record_marker, 1, build_int_cst (integer_type_node, gfc_option.record_marker)); gfc_add_expr_to_block (&body, tmp); } if (gfc_option.max_subrecord_length != 0) { tmp = build_call_expr_loc (input_location, gfor_fndecl_set_max_subrecord_length, 1, build_int_cst (integer_type_node, gfc_option.max_subrecord_length)); gfc_add_expr_to_block (&body, tmp); } /* Call MAIN__(). */ tmp = build_call_expr_loc (input_location, fndecl, 0); gfc_add_expr_to_block (&body, tmp); /* Mark MAIN__ as used. */ TREE_USED (fndecl) = 1; /* Coarray: Call _gfortran_caf_finalize(void). */ if (gfc_option.coarray == GFC_FCOARRAY_LIB) { /* Per F2008, 8.5.1 END of the main program implies a SYNC MEMORY. */ tmp = builtin_decl_explicit (BUILT_IN_SYNC_SYNCHRONIZE); tmp = build_call_expr_loc (input_location, tmp, 0); gfc_add_expr_to_block (&body, tmp); tmp = build_call_expr_loc (input_location, gfor_fndecl_caf_finalize, 0); gfc_add_expr_to_block (&body, tmp); } /* "return 0". */ tmp = fold_build2_loc (input_location, MODIFY_EXPR, integer_type_node, DECL_RESULT (ftn_main), build_int_cst (integer_type_node, 0)); tmp = build1_v (RETURN_EXPR, tmp); gfc_add_expr_to_block (&body, tmp); DECL_SAVED_TREE (ftn_main) = gfc_finish_block (&body); decl = getdecls (); /* Finish off this function and send it for code generation. */ poplevel (1, 0, 1); BLOCK_SUPERCONTEXT (DECL_INITIAL (ftn_main)) = ftn_main; DECL_SAVED_TREE (ftn_main) = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (ftn_main), DECL_INITIAL (ftn_main)); /* Output the GENERIC tree. */ dump_function (TDI_original, ftn_main); cgraph_finalize_function (ftn_main, true); if (old_context) { pop_function_context (); saved_function_decls = saved_parent_function_decls; } current_function_decl = old_context; } /* Get the result expression for a procedure. */ static tree get_proc_result (gfc_symbol* sym) { if (sym->attr.subroutine || sym == sym->result) { if (current_fake_result_decl != NULL) return TREE_VALUE (current_fake_result_decl); return NULL_TREE; } return sym->result->backend_decl; } /* Generate an appropriate return-statement for a procedure. */ tree gfc_generate_return (void) { gfc_symbol* sym; tree result; tree fndecl; sym = current_procedure_symbol; fndecl = sym->backend_decl; if (TREE_TYPE (DECL_RESULT (fndecl)) == void_type_node) result = NULL_TREE; else { result = get_proc_result (sym); /* Set the return value to the dummy result variable. The types may be different for scalar default REAL functions with -ff2c, therefore we have to convert. */ if (result != NULL_TREE) { result = convert (TREE_TYPE (DECL_RESULT (fndecl)), result); result = fold_build2_loc (input_location, MODIFY_EXPR, TREE_TYPE (result), DECL_RESULT (fndecl), result); } } return build1_v (RETURN_EXPR, result); } /* Generate code for a function. */ void gfc_generate_function_code (gfc_namespace * ns) { tree fndecl; tree old_context; tree decl; tree tmp; stmtblock_t init, cleanup; stmtblock_t body; gfc_wrapped_block try_block; tree recurcheckvar = NULL_TREE; gfc_symbol *sym; gfc_symbol *previous_procedure_symbol; int rank; bool is_recursive; sym = ns->proc_name; previous_procedure_symbol = current_procedure_symbol; current_procedure_symbol = sym; /* Check that the frontend isn't still using this. */ gcc_assert (sym->tlink == NULL); sym->tlink = sym; /* Create the declaration for functions with global scope. */ if (!sym->backend_decl) gfc_create_function_decl (ns, false); fndecl = sym->backend_decl; old_context = current_function_decl; if (old_context) { push_function_context (); saved_parent_function_decls = saved_function_decls; saved_function_decls = NULL_TREE; } trans_function_start (sym); gfc_init_block (&init); if (ns->entries && ns->proc_name->ts.type == BT_CHARACTER) { /* Copy length backend_decls to all entry point result symbols. */ gfc_entry_list *el; tree backend_decl; gfc_conv_const_charlen (ns->proc_name->ts.u.cl); backend_decl = ns->proc_name->result->ts.u.cl->backend_decl; for (el = ns->entries; el; el = el->next) el->sym->result->ts.u.cl->backend_decl = backend_decl; } /* Translate COMMON blocks. */ gfc_trans_common (ns); /* Null the parent fake result declaration if this namespace is a module function or an external procedures. */ if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE) || ns->parent == NULL) parent_fake_result_decl = NULL_TREE; gfc_generate_contained_functions (ns); nonlocal_dummy_decls = NULL; nonlocal_dummy_decl_pset = NULL; has_coarray_vars = false; generate_local_vars (ns); if (gfc_option.coarray == GFC_FCOARRAY_LIB && has_coarray_vars) generate_coarray_init (ns); /* Keep the parent fake result declaration in module functions or external procedures. */ if ((ns->parent && ns->parent->proc_name->attr.flavor == FL_MODULE) || ns->parent == NULL) current_fake_result_decl = parent_fake_result_decl; else current_fake_result_decl = NULL_TREE; is_recursive = sym->attr.recursive || (sym->attr.entry_master && sym->ns->entries->sym->attr.recursive); if ((gfc_option.rtcheck & GFC_RTCHECK_RECURSION) && !is_recursive && !gfc_option.flag_recursive) { char * msg; asprintf (&msg, "Recursive call to nonrecursive procedure '%s'", sym->name); recurcheckvar = gfc_create_var (boolean_type_node, "is_recursive"); TREE_STATIC (recurcheckvar) = 1; DECL_INITIAL (recurcheckvar) = boolean_false_node; gfc_add_expr_to_block (&init, recurcheckvar); gfc_trans_runtime_check (true, false, recurcheckvar, &init, &sym->declared_at, msg); gfc_add_modify (&init, recurcheckvar, boolean_true_node); free (msg); } /* Now generate the code for the body of this function. */ gfc_init_block (&body); if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node && sym->attr.subroutine) { tree alternate_return; alternate_return = gfc_get_fake_result_decl (sym, 0); gfc_add_modify (&body, alternate_return, integer_zero_node); } if (ns->entries) { /* Jump to the correct entry point. */ tmp = gfc_trans_entry_master_switch (ns->entries); gfc_add_expr_to_block (&body, tmp); } /* If bounds-checking is enabled, generate code to check passed in actual arguments against the expected dummy argument attributes (e.g. string lengths). */ if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) && !sym->attr.is_bind_c) add_argument_checking (&body, sym); tmp = gfc_trans_code (ns->code); gfc_add_expr_to_block (&body, tmp); if (TREE_TYPE (DECL_RESULT (fndecl)) != void_type_node) { tree result = get_proc_result (sym); if (result != NULL_TREE && sym->attr.function && !sym->attr.pointer) { if (sym->attr.allocatable && sym->attr.dimension == 0 && sym->result == sym) gfc_add_modify (&init, result, fold_convert (TREE_TYPE (result), null_pointer_node)); else if (sym->ts.type == BT_CLASS && CLASS_DATA (sym)->attr.allocatable && CLASS_DATA (sym)->attr.dimension == 0 && sym->result == sym) { tmp = CLASS_DATA (sym)->backend_decl; tmp = fold_build3_loc (input_location, COMPONENT_REF, TREE_TYPE (tmp), result, tmp, NULL_TREE); gfc_add_modify (&init, tmp, fold_convert (TREE_TYPE (tmp), null_pointer_node)); } else if (sym->ts.type == BT_DERIVED && sym->ts.u.derived->attr.alloc_comp && !sym->attr.allocatable) { rank = sym->as ? sym->as->rank : 0; tmp = gfc_nullify_alloc_comp (sym->ts.u.derived, result, rank); gfc_add_expr_to_block (&init, tmp); } } if (result == NULL_TREE) { /* TODO: move to the appropriate place in resolve.c. */ if (warn_return_type && sym == sym->result) gfc_warning ("Return value of function '%s' at %L not set", sym->name, &sym->declared_at); if (warn_return_type) TREE_NO_WARNING(sym->backend_decl) = 1; } else gfc_add_expr_to_block (&body, gfc_generate_return ()); } gfc_init_block (&cleanup); /* Reset recursion-check variable. */ if ((gfc_option.rtcheck & GFC_RTCHECK_RECURSION) && !is_recursive && !gfc_option.gfc_flag_openmp && recurcheckvar != NULL_TREE) { gfc_add_modify (&cleanup, recurcheckvar, boolean_false_node); recurcheckvar = NULL; } /* Finish the function body and add init and cleanup code. */ tmp = gfc_finish_block (&body); gfc_start_wrapped_block (&try_block, tmp); /* Add code to create and cleanup arrays. */ gfc_trans_deferred_vars (sym, &try_block); gfc_add_init_cleanup (&try_block, gfc_finish_block (&init), gfc_finish_block (&cleanup)); /* Add all the decls we created during processing. */ decl = saved_function_decls; while (decl) { tree next; next = DECL_CHAIN (decl); DECL_CHAIN (decl) = NULL_TREE; if (GFC_DECL_PUSH_TOPLEVEL (decl)) pushdecl_top_level (decl); else pushdecl (decl); decl = next; } saved_function_decls = NULL_TREE; DECL_SAVED_TREE (fndecl) = gfc_finish_wrapped_block (&try_block); decl = getdecls (); /* Finish off this function and send it for code generation. */ poplevel (1, 0, 1); BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; DECL_SAVED_TREE (fndecl) = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl), DECL_INITIAL (fndecl)); if (nonlocal_dummy_decls) { BLOCK_VARS (DECL_INITIAL (fndecl)) = chainon (BLOCK_VARS (DECL_INITIAL (fndecl)), nonlocal_dummy_decls); pointer_set_destroy (nonlocal_dummy_decl_pset); nonlocal_dummy_decls = NULL; nonlocal_dummy_decl_pset = NULL; } /* Output the GENERIC tree. */ dump_function (TDI_original, fndecl); /* Store the end of the function, so that we get good line number info for the epilogue. */ cfun->function_end_locus = input_location; /* We're leaving the context of this function, so zap cfun. It's still in DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */ set_cfun (NULL); if (old_context) { pop_function_context (); saved_function_decls = saved_parent_function_decls; } current_function_decl = old_context; if (decl_function_context (fndecl) && !gfc_option.coarray == GFC_FCOARRAY_LIB && has_coarray_vars) /* Register this function with cgraph just far enough to get it added to our parent's nested function list. If there are static coarrays in this function, the nested _caf_init function has already called cgraph_create_node, which also created the cgraph node for this function. */ (void) cgraph_create_node (fndecl); else cgraph_finalize_function (fndecl, true); gfc_trans_use_stmts (ns); gfc_traverse_ns (ns, gfc_emit_parameter_debug_info); if (sym->attr.is_main_program) create_main_function (fndecl); current_procedure_symbol = previous_procedure_symbol; } void gfc_generate_constructors (void) { gcc_assert (gfc_static_ctors == NULL_TREE); #if 0 tree fnname; tree type; tree fndecl; tree decl; tree tmp; if (gfc_static_ctors == NULL_TREE) return; fnname = get_file_function_name ("I"); type = build_function_type_list (void_type_node, NULL_TREE); fndecl = build_decl (input_location, FUNCTION_DECL, fnname, type); TREE_PUBLIC (fndecl) = 1; decl = build_decl (input_location, RESULT_DECL, NULL_TREE, void_type_node); DECL_ARTIFICIAL (decl) = 1; DECL_IGNORED_P (decl) = 1; DECL_CONTEXT (decl) = fndecl; DECL_RESULT (fndecl) = decl; pushdecl (fndecl); current_function_decl = fndecl; rest_of_decl_compilation (fndecl, 1, 0); make_decl_rtl (fndecl); init_function_start (fndecl); pushlevel (0); for (; gfc_static_ctors; gfc_static_ctors = TREE_CHAIN (gfc_static_ctors)) { tmp = build_call_expr_loc (input_location, TREE_VALUE (gfc_static_ctors), 0); DECL_SAVED_TREE (fndecl) = build_stmt (input_location, EXPR_STMT, tmp); } decl = getdecls (); poplevel (1, 0, 1); BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl; DECL_SAVED_TREE (fndecl) = build3_v (BIND_EXPR, decl, DECL_SAVED_TREE (fndecl), DECL_INITIAL (fndecl)); free_after_parsing (cfun); free_after_compilation (cfun); tree_rest_of_compilation (fndecl); current_function_decl = NULL_TREE; #endif } /* Translates a BLOCK DATA program unit. This means emitting the commons contained therein plus their initializations. We also emit a globally visible symbol to make sure that each BLOCK DATA program unit remains unique. */ void gfc_generate_block_data (gfc_namespace * ns) { tree decl; tree id; /* Tell the backend the source location of the block data. */ if (ns->proc_name) gfc_set_backend_locus (&ns->proc_name->declared_at); else gfc_set_backend_locus (&gfc_current_locus); /* Process the DATA statements. */ gfc_trans_common (ns); /* Create a global symbol with the mane of the block data. This is to generate linker errors if the same name is used twice. It is never really used. */ if (ns->proc_name) id = gfc_sym_mangled_function_id (ns->proc_name); else id = get_identifier ("__BLOCK_DATA__"); decl = build_decl (input_location, VAR_DECL, id, gfc_array_index_type); TREE_PUBLIC (decl) = 1; TREE_STATIC (decl) = 1; DECL_IGNORED_P (decl) = 1; pushdecl (decl); rest_of_decl_compilation (decl, 1, 0); } /* Process the local variables of a BLOCK construct. */ void gfc_process_block_locals (gfc_namespace* ns) { tree decl; gcc_assert (saved_local_decls == NULL_TREE); has_coarray_vars = false; generate_local_vars (ns); if (gfc_option.coarray == GFC_FCOARRAY_LIB && has_coarray_vars) generate_coarray_init (ns); decl = saved_local_decls; while (decl) { tree next; next = DECL_CHAIN (decl); DECL_CHAIN (decl) = NULL_TREE; pushdecl (decl); decl = next; } saved_local_decls = NULL_TREE; } #include "gt-fortran-trans-decl.h"
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