/* Process declarations and variables for C compiler. Copyright (C) 1988, 1992, 1993 Free Software Foundation, Inc. Hacked by Michael Tiemann (tiemann@cygnus.com) This file is part of GNU CC. GNU CC 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 2, or (at your option) any later version. GNU CC 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 GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Process declarations and symbol lookup for C front end. Also constructs types; the standard scalar types at initialization, and structure, union, array and enum types when they are declared. */ /* ??? not all decl nodes are given the most useful possible line numbers. For example, the CONST_DECLs for enum values. */ #include "config.h" #include #include "tree.h" #include "rtl.h" #include "flags.h" #include "cp-tree.h" #include "decl.h" #include "lex.h" extern tree grokdeclarator (); extern tree get_file_function_name (); extern tree cleanups_this_call; static void grok_function_init (); /* A list of virtual function tables we must make sure to write out. */ tree pending_vtables; /* A list of static class variables. This is needed, because a static class variable can be declared inside the class without an initializer, and then initialized, staticly, outside the class. */ tree pending_statics; /* A list of functions which were declared inline, but which we may need to emit outline anyway. */ static tree saved_inlines; /* Used to help generate temporary names which are unique within a function. Reset to 0 by start_function. */ static int temp_name_counter; /* Same, but not reset. Local temp variables and global temp variables can have the same name. */ static int global_temp_name_counter; /* Flag used when debugging spew.c */ extern int spew_debug; /* C (and C++) language-specific option variables. */ /* Nonzero means allow type mismatches in conditional expressions; just make their values `void'. */ int flag_cond_mismatch; /* Nonzero means give `double' the same size as `float'. */ int flag_short_double; /* Nonzero means don't recognize the keyword `asm'. */ int flag_no_asm; /* Nonzero means don't recognize the non-ANSI builtin functions. */ int flag_no_builtin; /* Nonzero means don't recognize the non-ANSI builtin functions. -ansi sets this. */ int flag_no_nonansi_builtin; /* Nonzero means do some things the same way PCC does. */ int flag_traditional; /* Nonzero means to treat bitfields as unsigned unless they say `signed'. */ int flag_signed_bitfields = 1; /* Nonzero means handle `#ident' directives. 0 means ignore them. */ int flag_no_ident = 0; /* Nonzero means disable GNU extensions. */ int flag_ansi = 0; /* Nonzero means do emit exported implementations of functions even if they can be inlined. */ int flag_implement_inlines = 1; /* Nonzero means do emit exported implementations of templates, instead of multiple static copies in each file that needs a definition. */ int flag_external_templates = 0; /* Nonzero means that the decision to emit or not emit the implementation of a template depends on where the template is instantiated, rather than where it is defined. */ int flag_alt_external_templates = 0; /* Nonzero means that implicit instantiations will be emitted if needed. */ int flag_implicit_templates = 1; /* Nonzero means warn about implicit declarations. */ int warn_implicit = 1; /* Nonzero means warn when all ctors or dtors are private, and the class has no friends. */ int warn_ctor_dtor_privacy = 1; /* True if we want to implement vtbvales using "thunks". The default is off now, but will be on later. Also causes output of vtables to be controlled by whether we seen the class's first non-inline virtual function. */ int flag_vtable_thunks = 0; /* Nonzero means give string constants the type `const char *' to get extra warnings from them. These warnings will be too numerous to be useful, except in thoroughly ANSIfied programs. */ int warn_write_strings; /* Nonzero means warn about pointer casts that can drop a type qualifier from the pointer target type. */ int warn_cast_qual; /* Nonzero means warn that dbx info for template class methods isn't fully supported yet. */ int warn_template_debugging; /* Warn about traditional constructs whose meanings changed in ANSI C. */ int warn_traditional; /* Nonzero means warn about sizeof(function) or addition/subtraction of function pointers. */ int warn_pointer_arith; /* Nonzero means warn for non-prototype function decls or non-prototyped defs without previous prototype. */ int warn_strict_prototypes; /* Nonzero means warn for any function def without prototype decl. */ int warn_missing_prototypes; /* Nonzero means warn about multiple (redundant) decls for the same single variable or function. */ int warn_redundant_decls; /* Warn if initializer is not completely bracketed. */ int warn_missing_braces; /* Warn about *printf or *scanf format/argument anomalies. */ int warn_format; /* Warn about a subscript that has type char. */ int warn_char_subscripts; /* Warn if a type conversion is done that might have confusing results. */ int warn_conversion; /* Warn if adding () is suggested. */ int warn_parentheses = 1; /* Non-zero means warn in function declared in derived class has the same name as a virtual in the base class, but fails to match the type signature of any virtual function in the base class. */ int warn_overloaded_virtual; /* Non-zero means warn when declaring a class that has a non virtual destructor, when it really ought to have a virtual one. */ int warn_nonvdtor; /* Non-zero means warn when a function is declared extern and later inline. */ int warn_extern_inline; /* Non-zero means warn when the compiler will reorder code. */ int warn_reorder; /* Non-zero means warn when sysnthesis behavior differs from Cfront's. */ int warn_synth; /* Nonzero means `$' can be in an identifier. See cccp.c for reasons why this breaks some obscure ANSI C programs. */ #ifndef DOLLARS_IN_IDENTIFIERS #define DOLLARS_IN_IDENTIFIERS 1 #endif int dollars_in_ident = DOLLARS_IN_IDENTIFIERS; /* Nonzero for -fno-strict-prototype switch: do not consider empty argument prototype to mean function takes no arguments. */ int strict_prototype = 1; int strict_prototypes_lang_c, strict_prototypes_lang_cplusplus = 1; /* Nonzero means that labels can be used as first-class objects */ int flag_labels_ok; /* Non-zero means to collect statistics which might be expensive and to print them when we are done. */ int flag_detailed_statistics; /* C++ specific flags. */ /* Nonzero for -fall-virtual: make every member function (except constructors) lay down in the virtual function table. Calls can then either go through the virtual function table or not, depending. */ int flag_all_virtual; /* Zero means that `this' is a *const. This gives nice behavior in the 2.0 world. 1 gives 1.2-compatible behavior. 2 gives Spring behavior. -2 means we're constructing an object and it has fixed type. */ int flag_this_is_variable; /* Nonzero means memoize our member lookups. */ int flag_memoize_lookups; int flag_save_memoized_contexts; /* 3 means write out only virtuals function tables `defined' in this implementation file. 2 means write out only specific virtual function tables and give them (C) public access. 1 means write out virtual function tables and give them (C) public access. 0 means write out virtual function tables and give them (C) static access (default). -1 means declare virtual function tables extern. */ int write_virtuals; /* Nonzero means we should attempt to elide constructors when possible. */ int flag_elide_constructors; /* Nonzero means recognize and handle exception handling constructs. Use ansi syntax and semantics. WORK IN PROGRESS! */ int flag_handle_exceptions; /* Nonzero means recognize and handle signature language constructs. */ int flag_handle_signatures; /* Nonzero means that member functions defined in class scope are inline by default. */ int flag_default_inline = 1; /* Controls whether enums and ints freely convert. 1 means with complete freedom. 0 means enums can convert to ints, but not vice-versa. */ int flag_int_enum_equivalence; /* Controls whether compiler is operating under LUCID's Cadillac system. 1 means yes, 0 means no. */ int flag_cadillac; /* Controls whether compiler generates code to build objects that can be collected when they become garbage. */ int flag_gc; /* Controls whether compiler generates 'dossiers' that give run-time type information. */ int flag_dossier; /* Nonzero if we wish to output cross-referencing information for the GNU class browser. */ extern int flag_gnu_xref; /* Nonzero if compiler can make `reasonable' assumptions about references and objects. For example, the compiler must be conservative about the following and not assume that `a' is nonnull: obj &a = g (); a.f (2); In general, it is `reasonable' to assume that for many programs, and better code can be generated in that case. */ int flag_assume_nonnull_objects; /* Nonzero if we want to support huge (> 2^(sizeof(short)*8-1) bytes) objects. */ int flag_huge_objects; /* Nonzero if we want to conserve space in the .o files. We do this by putting uninitialized data and runtime initialized data into .common instead of .data at the expense of not flaging multiple definitions. */ int flag_conserve_space; /* Nonzero if we want to obey access control semantics. */ int flag_access_control = 1; /* Table of language-dependent -f options. STRING is the option name. VARIABLE is the address of the variable. ON_VALUE is the value to store in VARIABLE if `-fSTRING' is seen as an option. (If `-fno-STRING' is seen as an option, the opposite value is stored.) */ static struct { char *string; int *variable; int on_value;} lang_f_options[] = { {"signed-char", &flag_signed_char, 1}, {"unsigned-char", &flag_signed_char, 0}, {"signed-bitfields", &flag_signed_bitfields, 1}, {"unsigned-bitfields", &flag_signed_bitfields, 0}, {"short-enums", &flag_short_enums, 1}, {"short-double", &flag_short_double, 1}, {"cond-mismatch", &flag_cond_mismatch, 1}, {"asm", &flag_no_asm, 0}, {"builtin", &flag_no_builtin, 0}, {"ident", &flag_no_ident, 0}, {"labels-ok", &flag_labels_ok, 1}, {"stats", &flag_detailed_statistics, 1}, {"this-is-variable", &flag_this_is_variable, 1}, {"strict-prototype", &strict_prototypes_lang_cplusplus, 1}, {"all-virtual", &flag_all_virtual, 1}, {"memoize-lookups", &flag_memoize_lookups, 1}, {"elide-constructors", &flag_elide_constructors, 1}, {"handle-exceptions", &flag_handle_exceptions, 1}, {"handle-signatures", &flag_handle_signatures, 1}, {"default-inline", &flag_default_inline, 1}, {"dollars-in-identifiers", &dollars_in_ident, 1}, {"enum-int-equiv", &flag_int_enum_equivalence, 1}, {"gc", &flag_gc, 1}, {"dossier", &flag_dossier, 1}, {"xref", &flag_gnu_xref, 1}, {"nonnull-objects", &flag_assume_nonnull_objects, 1}, {"implement-inlines", &flag_implement_inlines, 1}, {"external-templates", &flag_external_templates, 1}, {"implicit-templates", &flag_implicit_templates, 1}, {"huge-objects", &flag_huge_objects, 1}, {"conserve-space", &flag_conserve_space, 1}, {"vtable-thunks", &flag_vtable_thunks, 1}, {"short-temps", &flag_short_temps, 1}, {"access-control", &flag_access_control, 1}, {"nonansi-builtins", &flag_no_nonansi_builtin, 0} }; /* Decode the string P as a language-specific option. Return 1 if it is recognized (and handle it); return 0 if not recognized. */ int lang_decode_option (p) char *p; { if (!strcmp (p, "-ftraditional") || !strcmp (p, "-traditional")) flag_traditional = 1, dollars_in_ident = 1, flag_writable_strings = 1, flag_this_is_variable = 1; /* The +e options are for cfront compatibility. They come in as `-+eN', to kludge around gcc.c's argument handling. */ else if (p[0] == '-' && p[1] == '+' && p[2] == 'e') { int old_write_virtuals = write_virtuals; if (p[3] == '1') write_virtuals = 1; else if (p[3] == '0') write_virtuals = -1; else if (p[3] == '2') write_virtuals = 2; else error ("invalid +e option"); if (old_write_virtuals != 0 && write_virtuals != old_write_virtuals) error ("conflicting +e options given"); } else if (p[0] == '-' && p[1] == 'f') { /* Some kind of -f option. P's value is the option sans `-f'. Search for it in the table of options. */ int found = 0, j; p += 2; /* Try special -f options. */ if (!strcmp (p, "save-memoized")) { flag_memoize_lookups = 1; flag_save_memoized_contexts = 1; found = 1; } if (!strcmp (p, "no-save-memoized")) { flag_memoize_lookups = 0; flag_save_memoized_contexts = 0; found = 1; } else if (! strncmp (p, "cadillac", 8)) { flag_cadillac = atoi (p+9); found = 1; } else if (! strncmp (p, "no-cadillac", 11)) { flag_cadillac = 0; found = 1; } else if (! strcmp (p, "gc")) { flag_gc = 1; /* This must come along for the ride. */ flag_dossier = 1; found = 1; } else if (! strcmp (p, "no-gc")) { flag_gc = 0; /* This must come along for the ride. */ flag_dossier = 0; found = 1; } else if (! strcmp (p, "alt-external-templates")) { flag_external_templates = 1; flag_alt_external_templates = 1; found = 1; } else if (! strcmp (p, "no-alt-external-templates")) { flag_alt_external_templates = 0; found = 1; } else if (!strcmp (p, "ansi-overloading")) { warning ("-fansi-overloading is no longer meaningful"); } else for (j = 0; !found && j < sizeof (lang_f_options) / sizeof (lang_f_options[0]); j++) { if (!strcmp (p, lang_f_options[j].string)) { *lang_f_options[j].variable = lang_f_options[j].on_value; /* A goto here would be cleaner, but breaks the vax pcc. */ found = 1; } if (p[0] == 'n' && p[1] == 'o' && p[2] == '-' && ! strcmp (p+3, lang_f_options[j].string)) { *lang_f_options[j].variable = ! lang_f_options[j].on_value; found = 1; } } return found; } else if (p[0] == '-' && p[1] == 'W') { int setting = 1; /* The -W options control the warning behavior of the compiler. */ p += 2; if (p[0] == 'n' && p[1] == 'o' && p[2] == '-') setting = 0, p += 3; if (!strcmp (p, "implicit")) warn_implicit = setting; else if (!strcmp (p, "return-type")) warn_return_type = setting; else if (!strcmp (p, "ctor-dtor-privacy")) warn_ctor_dtor_privacy = setting; else if (!strcmp (p, "write-strings")) warn_write_strings = setting; else if (!strcmp (p, "cast-qual")) warn_cast_qual = setting; else if (!strcmp (p, "traditional")) warn_traditional = setting; else if (!strcmp (p, "char-subscripts")) warn_char_subscripts = setting; else if (!strcmp (p, "pointer-arith")) warn_pointer_arith = setting; else if (!strcmp (p, "strict-prototypes")) warn_strict_prototypes = setting; else if (!strcmp (p, "missing-prototypes")) warn_missing_prototypes = setting; else if (!strcmp (p, "redundant-decls")) warn_redundant_decls = setting; else if (!strcmp (p, "missing-braces")) warn_missing_braces = setting; else if (!strcmp (p, "format")) warn_format = setting; else if (!strcmp (p, "conversion")) warn_conversion = setting; else if (!strcmp (p, "parentheses")) warn_parentheses = setting; else if (!strcmp (p, "non-virtual-dtor")) warn_nonvdtor = setting; else if (!strcmp (p, "extern-inline")) warn_extern_inline = setting; else if (!strcmp (p, "reorder")) warn_reorder = setting; else if (!strcmp (p, "synth")) warn_synth = setting; else if (!strcmp (p, "comment")) ; /* cpp handles this one. */ else if (!strcmp (p, "comments")) ; /* cpp handles this one. */ else if (!strcmp (p, "trigraphs")) ; /* cpp handles this one. */ else if (!strcmp (p, "import")) ; /* cpp handles this one. */ else if (!strcmp (p, "all")) { extra_warnings = setting; warn_return_type = setting; warn_unused = setting; warn_implicit = setting; warn_ctor_dtor_privacy = setting; warn_switch = setting; warn_format = setting; warn_missing_braces = setting; warn_extern_inline = setting; warn_nonvdtor = setting; /* We save the value of warn_uninitialized, since if they put -Wuninitialized on the command line, we need to generate a warning about not using it without also specifying -O. */ if (warn_uninitialized != 1) warn_uninitialized = (setting ? 2 : 0); warn_template_debugging = setting; warn_reorder = setting; } else if (!strcmp (p, "overloaded-virtual")) warn_overloaded_virtual = setting; else return 0; } else if (!strcmp (p, "-ansi")) flag_no_asm = 1, dollars_in_ident = 0, flag_no_nonansi_builtin = 1, flag_ansi = 1; #ifdef SPEW_DEBUG /* Undocumented, only ever used when you're invoking cc1plus by hand, since it's probably safe to assume no sane person would ever want to use this under normal circumstances. */ else if (!strcmp (p, "-spew-debug")) spew_debug = 1; #endif else return 0; return 1; } /* Incorporate `const' and `volatile' qualifiers for member functions. FUNCTION is a TYPE_DECL or a FUNCTION_DECL. QUALS is a list of qualifiers. */ tree grok_method_quals (ctype, function, quals) tree ctype, function, quals; { tree fntype = TREE_TYPE (function); tree raises = TYPE_RAISES_EXCEPTIONS (fntype); do { extern tree ridpointers[]; if (TREE_VALUE (quals) == ridpointers[(int)RID_CONST]) { if (TYPE_READONLY (ctype)) error ("duplicate `%s' %s", IDENTIFIER_POINTER (TREE_VALUE (quals)), (TREE_CODE (function) == FUNCTION_DECL ? "for member function" : "in type declaration")); ctype = build_type_variant (ctype, 1, TYPE_VOLATILE (ctype)); build_pointer_type (ctype); } else if (TREE_VALUE (quals) == ridpointers[(int)RID_VOLATILE]) { if (TYPE_VOLATILE (ctype)) error ("duplicate `%s' %s", IDENTIFIER_POINTER (TREE_VALUE (quals)), (TREE_CODE (function) == FUNCTION_DECL ? "for member function" : "in type declaration")); ctype = build_type_variant (ctype, TYPE_READONLY (ctype), 1); build_pointer_type (ctype); } else my_friendly_abort (20); quals = TREE_CHAIN (quals); } while (quals); fntype = build_cplus_method_type (ctype, TREE_TYPE (fntype), (TREE_CODE (fntype) == METHOD_TYPE ? TREE_CHAIN (TYPE_ARG_TYPES (fntype)) : TYPE_ARG_TYPES (fntype))); if (raises) fntype = build_exception_variant (ctype, fntype, raises); TREE_TYPE (function) = fntype; return ctype; } #if 0 /* Not used. */ /* This routine replaces cryptic DECL_NAMEs with readable DECL_NAMEs. It leaves DECL_ASSEMBLER_NAMEs with the correct value. */ /* This does not yet work with user defined conversion operators It should. */ static void substitute_nice_name (decl) tree decl; { if (DECL_NAME (decl) && TREE_CODE (DECL_NAME (decl)) == IDENTIFIER_NODE) { char *n = decl_as_string (DECL_NAME (decl), 1); if (n[strlen (n) - 1] == ' ') n[strlen (n) - 1] = 0; DECL_NAME (decl) = get_identifier (n); } } #endif /* Warn when -fexternal-templates is used and #pragma interface/implementation is not used all the times it should be, inform the user. */ void warn_if_unknown_interface () { static int already_warned = 0; if (++already_warned == 1) warning ("templates that are built with -fexternal-templates should be in files that have #pragma interface/implementation"); } /* A subroutine of the parser, to handle a component list. */ tree grok_x_components (specs, components) tree specs, components; { register tree t, x, tcode; /* We just got some friends. They have been recorded elsewhere. */ if (components == void_type_node) return NULL_TREE; if (components == NULL_TREE) { t = groktypename (build_decl_list (specs, NULL_TREE)); if (t == NULL_TREE) { error ("error in component specification"); return NULL_TREE; } switch (TREE_CODE (t)) { case VAR_DECL: /* Static anonymous unions come out as VAR_DECLs. */ if (TREE_CODE (TREE_TYPE (t)) == UNION_TYPE && ANON_AGGRNAME_P (TYPE_IDENTIFIER (TREE_TYPE (t)))) return t; /* We return SPECS here, because in the parser it was ending up with not doing anything to $$, which is what SPECS represents. */ return specs; break; case RECORD_TYPE: /* This code may be needed for UNION_TYPEs as well. */ tcode = record_type_node; if (CLASSTYPE_DECLARED_CLASS(t)) tcode = class_type_node; else if (IS_SIGNATURE(t)) tcode = signature_type_node; else if (CLASSTYPE_DECLARED_EXCEPTION(t)) tcode = exception_type_node; t = xref_defn_tag(tcode, TYPE_IDENTIFIER(t), NULL_TREE); if (TYPE_CONTEXT(t)) CLASSTYPE_NO_GLOBALIZE(t) = 1; if (TYPE_LANG_SPECIFIC (t) && CLASSTYPE_DECLARED_EXCEPTION (t)) shadow_tag (specs); return NULL_TREE; break; case UNION_TYPE: case ENUMERAL_TYPE: if (TREE_CODE(t) == UNION_TYPE) tcode = union_type_node; else tcode = enum_type_node; t = xref_defn_tag(tcode, TYPE_IDENTIFIER(t), NULL_TREE); if (TREE_CODE(t) == UNION_TYPE && TYPE_CONTEXT(t)) CLASSTYPE_NO_GLOBALIZE(t) = 1; if (TREE_CODE (t) == UNION_TYPE && ANON_AGGRNAME_P (TYPE_IDENTIFIER (t))) { struct pending_inline **p; x = build_lang_field_decl (FIELD_DECL, NULL_TREE, t); /* Wipe out memory of synthesized methods */ TYPE_HAS_CONSTRUCTOR (t) = 0; TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0; TYPE_HAS_INIT_REF (t) = 0; TYPE_HAS_CONST_INIT_REF (t) = 0; TYPE_HAS_ASSIGN_REF (t) = 0; TYPE_HAS_ASSIGNMENT (t) = 0; TYPE_HAS_CONST_ASSIGN_REF (t) = 0; p = &pending_inlines; for (; *p; *p = (*p)->next) if (DECL_CONTEXT ((*p)->fndecl) != t) break; } else if (TREE_CODE (t) == ENUMERAL_TYPE) x = grok_enum_decls (t, NULL_TREE); else x = NULL_TREE; return x; break; default: if (t != void_type_node) error ("empty component declaration"); return NULL_TREE; } } else { t = TREE_TYPE (components); if (TREE_CODE (t) == ENUMERAL_TYPE && TREE_NONLOCAL_FLAG (t)) return grok_enum_decls (t, components); else return components; } } /* Classes overload their constituent function names automatically. When a function name is declared in a record structure, its name is changed to it overloaded name. Since names for constructors and destructors can conflict, we place a leading '$' for destructors. CNAME is the name of the class we are grokking for. FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'. FLAGS contains bits saying what's special about today's arguments. 1 == DESTRUCTOR. 2 == OPERATOR. If FUNCTION is a destructor, then we must add the `auto-delete' field as a second parameter. There is some hair associated with the fact that we must "declare" this variable in the manner consistent with the way the rest of the arguments were declared. QUALS are the qualifiers for the this pointer. */ void grokclassfn (ctype, cname, function, flags, quals) tree ctype, cname, function; enum overload_flags flags; tree quals; { tree fn_name = DECL_NAME (function); tree arg_types; tree parm; tree qualtype; if (fn_name == NULL_TREE) { error ("name missing for member function"); fn_name = get_identifier (""); DECL_NAME (function) = fn_name; } if (quals) qualtype = grok_method_quals (ctype, function, quals); else qualtype = ctype; arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE) { /* Must add the class instance variable up front. */ /* Right now we just make this a pointer. But later we may wish to make it special. */ tree type = TREE_VALUE (arg_types); if ((flag_this_is_variable > 0) && (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))) type = TYPE_MAIN_VARIANT (type); if (DECL_CONSTRUCTOR_P (function)) { if (TYPE_USES_VIRTUAL_BASECLASSES (ctype)) { DECL_CONSTRUCTOR_FOR_VBASE_P (function) = 1; /* In this case we need "in-charge" flag saying whether this constructor is responsible for initialization of virtual baseclasses or not. */ parm = build_decl (PARM_DECL, in_charge_identifier, integer_type_node); /* Mark the artificial `__in_chrg' parameter as "artificial". */ SET_DECL_ARTIFICIAL (parm); DECL_ARG_TYPE (parm) = integer_type_node; DECL_REGISTER (parm) = 1; TREE_CHAIN (parm) = last_function_parms; last_function_parms = parm; } } parm = build_decl (PARM_DECL, this_identifier, type); /* Mark the artificial `this' parameter as "artificial". */ SET_DECL_ARTIFICIAL (parm); DECL_ARG_TYPE (parm) = type; /* We can make this a register, so long as we don't accidentally complain if someone tries to take its address. */ DECL_REGISTER (parm) = 1; if (TYPE_READONLY (type)) TREE_READONLY (parm) = 1; TREE_CHAIN (parm) = last_function_parms; last_function_parms = parm; } if (flags == DTOR_FLAG) { char *buf, *dbuf; tree const_integer_type = build_type_variant (integer_type_node, 1, 0); int len = sizeof (DESTRUCTOR_DECL_PREFIX)-1; arg_types = hash_tree_chain (const_integer_type, void_list_node); TREE_SIDE_EFFECTS (arg_types) = 1; /* Build the overload name. It will look like `7Example'. */ if (IDENTIFIER_TYPE_VALUE (cname)) dbuf = build_overload_name (IDENTIFIER_TYPE_VALUE (cname), 1, 1); else if (IDENTIFIER_LOCAL_VALUE (cname)) dbuf = build_overload_name (TREE_TYPE (IDENTIFIER_LOCAL_VALUE (cname)), 1, 1); else /* Using ctype fixes the `X::Y::~Y()' crash. The cname has no type when it's defined out of the class definition, since poplevel_class wipes it out. This used to be internal error 346. */ dbuf = build_overload_name (ctype, 1, 1); buf = (char *) alloca (strlen (dbuf) + sizeof (DESTRUCTOR_DECL_PREFIX)); bcopy (DESTRUCTOR_DECL_PREFIX, buf, len); buf[len] = '\0'; strcat (buf, dbuf); DECL_ASSEMBLER_NAME (function) = get_identifier (buf); parm = build_decl (PARM_DECL, in_charge_identifier, const_integer_type); /* Mark the artificial `__in_chrg' parameter as "artificial". */ SET_DECL_ARTIFICIAL (parm); TREE_USED (parm) = 1; #if 0 /* We don't need to mark the __in_chrg parameter itself as `const' since its type is already `const int'. In fact we MUST NOT mark it as `const' cuz that will screw up the debug info (causing it to say that the type of __in_chrg is `const const int'). */ TREE_READONLY (parm) = 1; #endif DECL_ARG_TYPE (parm) = const_integer_type; /* This is the same chain as DECL_ARGUMENTS (...). */ TREE_CHAIN (last_function_parms) = parm; TREE_TYPE (function) = build_cplus_method_type (qualtype, void_type_node, arg_types); TYPE_HAS_DESTRUCTOR (ctype) = 1; } else { tree these_arg_types; if (DECL_CONSTRUCTOR_FOR_VBASE_P (function)) { arg_types = hash_tree_chain (integer_type_node, TREE_CHAIN (arg_types)); TREE_TYPE (function) = build_cplus_method_type (qualtype, TREE_TYPE (TREE_TYPE (function)), arg_types); arg_types = TYPE_ARG_TYPES (TREE_TYPE (function)); } these_arg_types = arg_types; if (TREE_CODE (TREE_TYPE (function)) == FUNCTION_TYPE) /* Only true for static member functions. */ these_arg_types = hash_tree_chain (TYPE_POINTER_TO (qualtype), arg_types); DECL_ASSEMBLER_NAME (function) = build_decl_overload (fn_name, these_arg_types, 1 + DECL_CONSTRUCTOR_P (function)); #if 0 /* This code is going into the compiler, but currently, it makes libg++/src/Interger.cc not compile. The problem is that the nice name winds up going into the symbol table, and conversion operations look for the manged name. */ substitute_nice_name (function); #endif } DECL_ARGUMENTS (function) = last_function_parms; /* First approximations. */ DECL_CONTEXT (function) = ctype; DECL_CLASS_CONTEXT (function) = ctype; } /* Work on the expr used by alignof (this is only called by the parser). */ tree grok_alignof (expr) tree expr; { tree best, t; int bestalign; if (TREE_CODE (expr) == COMPONENT_REF && DECL_BIT_FIELD (TREE_OPERAND (expr, 1))) error ("`__alignof__' applied to a bit-field"); if (TREE_CODE (expr) == INDIRECT_REF) { best = t = TREE_OPERAND (expr, 0); bestalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); while (TREE_CODE (t) == NOP_EXPR && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == POINTER_TYPE) { int thisalign; t = TREE_OPERAND (t, 0); thisalign = TYPE_ALIGN (TREE_TYPE (TREE_TYPE (t))); if (thisalign > bestalign) best = t, bestalign = thisalign; } return c_alignof (TREE_TYPE (TREE_TYPE (best))); } else { /* ANSI says arrays and fns are converted inside comma. But we can't convert them in build_compound_expr because that would break commas in lvalues. So do the conversion here if operand was a comma. */ if (TREE_CODE (expr) == COMPOUND_EXPR && (TREE_CODE (TREE_TYPE (expr)) == ARRAY_TYPE || TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE)) expr = default_conversion (expr); return c_alignof (TREE_TYPE (expr)); } } /* Create an ARRAY_REF, checking for the user doing things backwards along the way. */ tree grok_array_decl (array_expr, index_exp) tree array_expr, index_exp; { tree type = TREE_TYPE (array_expr); if (type == error_mark_node || index_exp == error_mark_node) return error_mark_node; if (type == NULL_TREE) { /* Something has gone very wrong. Assume we are mistakenly reducing an expression instead of a declaration. */ error ("parser may be lost: is there a '{' missing somewhere?"); return NULL_TREE; } if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == REFERENCE_TYPE) type = TREE_TYPE (type); /* If they have an `operator[]', use that. */ if (TYPE_LANG_SPECIFIC (type) && TYPE_OVERLOADS_ARRAY_REF (type)) return build_opfncall (ARRAY_REF, LOOKUP_NORMAL, array_expr, index_exp, NULL_TREE); /* Otherwise, create an ARRAY_REF for a pointer or array type. */ if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == ARRAY_TYPE) return build_array_ref (array_expr, index_exp); /* Woops, looks like they did something like `5[a]' instead of `a[5]'. We don't emit a warning or error for this, since it's allowed by ARM $8.2.4. */ type = TREE_TYPE (index_exp); if (TREE_CODE (type) == OFFSET_TYPE || TREE_CODE (type) == REFERENCE_TYPE) type = TREE_TYPE (type); if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == ARRAY_TYPE) return build_array_ref (index_exp, array_expr); /* The expression E1[E2] is identical (by definition) to *((E1)+(E2)). */ return build_indirect_ref (build_binary_op (PLUS_EXPR, array_expr, index_exp, 1), "array indexing"); } /* Given the cast expression EXP, checking out its validity. Either return an error_mark_node if there was an unavoidable error, return a cast to void for trying to delete a pointer w/ the value 0, or return the call to delete. If DOING_VEC is 1, we handle things differently for doing an array delete. If DOING_VEC is 2, they gave us the array size as an argument to delete. Implements ARM $5.3.4. This is called from the parser. */ tree delete_sanity (exp, size, doing_vec, use_global_delete) tree exp, size; int doing_vec, use_global_delete; { tree t = stabilize_reference (convert_from_reference (exp)); tree type = TREE_TYPE (t); enum tree_code code = TREE_CODE (type); /* For a regular vector delete (aka, no size argument) we will pass this down as a NULL_TREE into build_vec_delete. */ tree maxindex = NULL_TREE; /* This is used for deleting arrays. */ tree elt_size; switch (doing_vec) { case 2: maxindex = build_binary_op (MINUS_EXPR, size, integer_one_node, 1); if (! flag_traditional) pedwarn ("anachronistic use of array size in vector delete"); /* Fall through. */ case 1: elt_size = c_sizeof (type); break; default: if (code != POINTER_TYPE) { cp_error ("type `%#T' argument given to `delete', expected pointer", type); return error_mark_node; } /* Deleting a pointer with the value zero is legal and has no effect. */ if (integer_zerop (t)) return build1 (NOP_EXPR, void_type_node, t); } if (code == POINTER_TYPE) { /* You can't delete a pointer to constant. */ if (TREE_READONLY (TREE_TYPE (type))) { error ("`const *' cannot be deleted"); return error_mark_node; } /* You also can't delete functions. */ if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE) { error ("cannot delete a function"); return error_mark_node; } } #if 0 /* If the type has no destructor, then we should build a regular delete, instead of a vector delete. Otherwise, we would end up passing a bogus offset into __builtin_delete, which is not expecting it. */ if (doing_vec && TREE_CODE (type) == POINTER_TYPE && !TYPE_HAS_DESTRUCTOR (TREE_TYPE (type))) { doing_vec = 0; use_global_delete = 1; } #endif if (doing_vec) return build_vec_delete (t, maxindex, elt_size, integer_one_node, integer_two_node, use_global_delete); else return build_delete (type, t, integer_three_node, LOOKUP_NORMAL|LOOKUP_HAS_IN_CHARGE, use_global_delete); } /* Sanity check: report error if this function FUNCTION is not really a member of the class (CTYPE) it is supposed to belong to. CNAME is the same here as it is for grokclassfn above. */ void check_classfn (ctype, cname, function) tree ctype, cname, function; { tree fn_name = DECL_NAME (function); tree fndecl; tree method_vec = CLASSTYPE_METHOD_VEC (ctype); tree *methods = 0; tree *end = 0; if (method_vec != 0) { methods = &TREE_VEC_ELT (method_vec, 0); end = TREE_VEC_END (method_vec); /* First suss out ctors and dtors. */ if (*methods && fn_name == cname) goto got_it; while (++methods != end) { if (fn_name == DECL_NAME (*methods)) { got_it: fndecl = *methods; while (fndecl) { if (DECL_ASSEMBLER_NAME (function) == DECL_ASSEMBLER_NAME (fndecl)) return; fndecl = DECL_CHAIN (fndecl); } break; /* loser */ } } } if (methods != end) cp_error ("argument list for `%#D' does not match any in class `%T'", function, ctype); else { methods = 0; cp_error ("no `%#D' member function declared in class `%T'", function, ctype); } /* If we did not find the method in the class, add it to avoid spurious errors. */ add_method (ctype, methods, function); } /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted) of a structure component, returning a FIELD_DECL node. QUALS is a list of type qualifiers for this decl (such as for declaring const member functions). This is done during the parsing of the struct declaration. The FIELD_DECL nodes are chained together and the lot of them are ultimately passed to `build_struct' to make the RECORD_TYPE node. C++: If class A defines that certain functions in class B are friends, then the way I have set things up, it is B who is interested in permission granted by A. However, it is in A's context that these declarations are parsed. By returning a void_type_node, class A does not attempt to incorporate the declarations of the friends within its structure. DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING CHANGES TO CODE IN `start_method'. */ tree grokfield (declarator, declspecs, raises, init, asmspec_tree) tree declarator, declspecs, raises, init, asmspec_tree; { register tree value; char *asmspec = 0; /* Convert () initializers to = initializers. */ if (init == NULL_TREE && declarator != NULL_TREE && TREE_CODE (declarator) == CALL_EXPR && TREE_OPERAND (declarator, 0) && (TREE_CODE (TREE_OPERAND (declarator, 0)) == IDENTIFIER_NODE || TREE_CODE (TREE_OPERAND (declarator, 0)) == SCOPE_REF) && parmlist_is_exprlist (TREE_OPERAND (declarator, 1))) { init = TREE_OPERAND (declarator, 1); declarator = TREE_OPERAND (declarator, 0); } if (init && TREE_CODE (init) == TREE_LIST && TREE_VALUE (init) == error_mark_node && TREE_CHAIN (init) == NULL_TREE) init = NULL_TREE; value = grokdeclarator (declarator, declspecs, FIELD, init != 0, raises); if (! value) return value; /* friend or constructor went bad. */ /* Pass friendly classes back. */ if (TREE_CODE (value) == VOID_TYPE) return void_type_node; if (DECL_NAME (value) != NULL_TREE && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_' && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr")) cp_error ("member `%D' conflicts with virtual function table field name", value); /* Stash away type declarations. */ if (TREE_CODE (value) == TYPE_DECL) { DECL_NONLOCAL (value) = 1; DECL_CONTEXT (value) = current_class_type; DECL_CLASS_CONTEXT (value) = current_class_type; CLASSTYPE_LOCAL_TYPEDECLS (current_class_type) = 1; pushdecl_class_level (value); return value; } if (IS_SIGNATURE (current_class_type) && TREE_CODE (value) != FUNCTION_DECL) { error ("field declaration not allowed in signature"); return void_type_node; } if (DECL_IN_AGGR_P (value)) { cp_error ("`%D' is already defined in the class %T", value, DECL_CONTEXT (value)); return void_type_node; } if (flag_cadillac) cadillac_start_decl (value); if (asmspec_tree) asmspec = TREE_STRING_POINTER (asmspec_tree); if (init) { if (IS_SIGNATURE (current_class_type) && TREE_CODE (value) == FUNCTION_DECL) { error ("function declarations cannot have initializers in signature"); init = NULL_TREE; } else if (TREE_CODE (value) == FUNCTION_DECL) { grok_function_init (value, init); init = NULL_TREE; } else if (pedantic && TREE_CODE (value) != VAR_DECL) /* Already complained in grokdeclarator. */ init = NULL_TREE; else { /* We allow initializers to become parameters to base initializers. */ if (TREE_CODE (init) == TREE_LIST) { if (TREE_CHAIN (init) == NULL_TREE) init = TREE_VALUE (init); else init = digest_init (TREE_TYPE (value), init, (tree *)0); } if (TREE_CODE (init) == CONST_DECL) init = DECL_INITIAL (init); else if (TREE_READONLY_DECL_P (init)) init = decl_constant_value (init); else if (TREE_CODE (init) == CONSTRUCTOR) init = digest_init (TREE_TYPE (value), init, (tree *)0); my_friendly_assert (TREE_PERMANENT (init), 192); if (init == error_mark_node) /* We must make this look different than `error_mark_node' because `decl_const_value' would mis-interpret it as only meaning that this VAR_DECL is defined. */ init = build1 (NOP_EXPR, TREE_TYPE (value), init); else if (! TREE_CONSTANT (init)) { /* We can allow references to things that are effectively static, since references are initialized with the address. */ if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE || (TREE_STATIC (init) == 0 && (TREE_CODE_CLASS (TREE_CODE (init)) != 'd' || DECL_EXTERNAL (init) == 0))) { error ("field initializer is not constant"); init = error_mark_node; } } } } /* The corresponding pop_obstacks is in finish_decl. */ push_obstacks_nochange (); if (TREE_CODE (value) == VAR_DECL) { /* We cannot call pushdecl here, because that would fill in the value of our TREE_CHAIN. Instead, we modify finish_decl to do the right thing, namely, to put this decl out straight away. */ if (TREE_PUBLIC (value)) { /* current_class_type can be NULL_TREE in case of error. */ if (asmspec == 0 && current_class_type) { TREE_PUBLIC (value) = 1; DECL_INITIAL (value) = error_mark_node; DECL_ASSEMBLER_NAME (value) = build_static_name (current_class_type, DECL_NAME (value)); } pending_statics = perm_tree_cons (NULL_TREE, value, pending_statics); /* Static consts need not be initialized in the class definition. */ if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (value))) { static int explanation = 0; error ("initializer invalid for static member with constructor"); if (explanation++ == 0) error ("(you really want to initialize it separately)"); init = 0; } /* Force the compiler to know when an uninitialized static const member is being used. */ if (TYPE_READONLY (value) && init == 0) TREE_USED (value) = 1; } DECL_INITIAL (value) = init; DECL_IN_AGGR_P (value) = 1; finish_decl (value, init, asmspec_tree, 1); pushdecl_class_level (value); return value; } if (TREE_CODE (value) == FIELD_DECL) { if (asmspec) DECL_ASSEMBLER_NAME (value) = get_identifier (asmspec); if (DECL_INITIAL (value) == error_mark_node) init = error_mark_node; finish_decl (value, init, asmspec_tree, 1); DECL_INITIAL (value) = init; DECL_IN_AGGR_P (value) = 1; return value; } if (TREE_CODE (value) == FUNCTION_DECL) { if (DECL_CHAIN (value) != NULL_TREE) { /* Need a fresh node here so that we don't get circularity when we link these together. */ value = copy_node (value); /* When does this happen? */ my_friendly_assert (init == NULL_TREE, 193); } finish_decl (value, init, asmspec_tree, 1); /* Pass friends back this way. */ if (DECL_FRIEND_P (value)) return void_type_node; #if 0 /* Just because a fn is declared doesn't mean we'll try to define it. */ if (current_function_decl && ! IS_SIGNATURE (current_class_type)) cp_error ("method `%#D' of local class must be defined in class body", value); #endif DECL_IN_AGGR_P (value) = 1; return value; } my_friendly_abort (21); /* NOTREACHED */ return NULL_TREE; } /* Like `grokfield', but for bitfields. WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */ tree grokbitfield (declarator, declspecs, width) tree declarator, declspecs, width; { register tree value = grokdeclarator (declarator, declspecs, BITFIELD, 0, NULL_TREE); if (! value) return NULL_TREE; /* friends went bad. */ /* Pass friendly classes back. */ if (TREE_CODE (value) == VOID_TYPE) return void_type_node; if (TREE_CODE (value) == TYPE_DECL) { cp_error ("cannot declare `%D' to be a bitfield type", value); return NULL_TREE; } if (IS_SIGNATURE (current_class_type)) { error ("field declaration not allowed in signature"); return void_type_node; } if (DECL_IN_AGGR_P (value)) { cp_error ("`%D' is already defined in the class %T", value, DECL_CONTEXT (value)); return void_type_node; } GNU_xref_member (current_class_name, value); if (TREE_STATIC (value)) { cp_error ("static member `%D' cannot be a bitfield", value); return NULL_TREE; } finish_decl (value, NULL_TREE, NULL_TREE, 0); if (width != error_mark_node) { /* detect invalid field size. */ if (TREE_CODE (width) == CONST_DECL) width = DECL_INITIAL (width); else if (TREE_READONLY_DECL_P (width)) width = decl_constant_value (width); if (TREE_CODE (width) != INTEGER_CST) { cp_error ("structure field `%D' width not an integer constant", value); DECL_INITIAL (value) = NULL_TREE; } else { constant_expression_warning (width); DECL_INITIAL (value) = width; DECL_BIT_FIELD (value) = 1; } } DECL_IN_AGGR_P (value) = 1; return value; } #if 0 /* Like GROKFIELD, except that the declarator has been buried in DECLSPECS. Find the declarator, and return something that looks like it came from GROKFIELD. */ tree groktypefield (declspecs, parmlist) tree declspecs; tree parmlist; { tree spec = declspecs; tree prev = NULL_TREE; tree type_id = NULL_TREE; tree quals = NULL_TREE; tree lengths = NULL_TREE; tree decl = NULL_TREE; while (spec) { register tree id = TREE_VALUE (spec); if (TREE_CODE (spec) != TREE_LIST) /* Certain parse errors slip through. For example, `int class ();' is not caught by the parser. Try weakly to recover here. */ return NULL_TREE; if (TREE_CODE (id) == TYPE_DECL || (TREE_CODE (id) == IDENTIFIER_NODE && TREE_TYPE (id))) { /* We have a constructor/destructor or conversion operator. Use it. */ if (prev) TREE_CHAIN (prev) = TREE_CHAIN (spec); else declspecs = TREE_CHAIN (spec); type_id = id; goto found; } prev = spec; spec = TREE_CHAIN (spec); } /* Nope, we have a conversion operator to a scalar type or something else, that includes things like constructor declarations for templates. */ spec = declspecs; while (spec) { tree id = TREE_VALUE (spec); if (TREE_CODE (id) == IDENTIFIER_NODE) { if (id == ridpointers[(int)RID_INT] || id == ridpointers[(int)RID_DOUBLE] || id == ridpointers[(int)RID_FLOAT] || id == ridpointers[(int)RID_WCHAR]) { if (type_id) error ("extra `%s' ignored", IDENTIFIER_POINTER (id)); else type_id = id; } else if (id == ridpointers[(int)RID_LONG] || id == ridpointers[(int)RID_SHORT] || id == ridpointers[(int)RID_CHAR]) { lengths = tree_cons (NULL_TREE, id, lengths); } else if (id == ridpointers[(int)RID_VOID]) { if (type_id) error ("spurious `void' type ignored"); else error ("conversion to `void' type invalid"); } else if (id == ridpointers[(int)RID_AUTO] || id == ridpointers[(int)RID_REGISTER] || id == ridpointers[(int)RID_TYPEDEF] || id == ridpointers[(int)RID_CONST] || id == ridpointers[(int)RID_VOLATILE]) { error ("type specifier `%s' used invalidly", IDENTIFIER_POINTER (id)); } else if (id == ridpointers[(int)RID_FRIEND] || id == ridpointers[(int)RID_VIRTUAL] || id == ridpointers[(int)RID_INLINE] || id == ridpointers[(int)RID_UNSIGNED] || id == ridpointers[(int)RID_SIGNED] || id == ridpointers[(int)RID_STATIC] || id == ridpointers[(int)RID_EXTERN]) { quals = tree_cons (NULL_TREE, id, quals); } else { /* Happens when we have a global typedef and a class-local member function with the same name. */ type_id = id; goto found; } } else if (TREE_CODE (id) == RECORD_TYPE) { type_id = TYPE_NAME (id); if (TREE_CODE (type_id) == TYPE_DECL) type_id = DECL_NAME (type_id); if (type_id == NULL_TREE) error ("identifier for aggregate type conversion omitted"); } else if (TREE_CODE_CLASS (TREE_CODE (id)) == 't') error ("`operator' missing on conversion operator or tag missing from type"); else my_friendly_abort (194); spec = TREE_CHAIN (spec); } if (type_id) declspecs = chainon (lengths, quals); else if (lengths) { if (TREE_CHAIN (lengths)) error ("multiple length specifiers"); type_id = ridpointers[(int)RID_INT]; declspecs = chainon (lengths, quals); } else if (quals) { error ("no type given, defaulting to `operator int ...'"); type_id = ridpointers[(int)RID_INT]; declspecs = quals; } else return NULL_TREE; found: decl = grokdeclarator (build_parse_node (CALL_EXPR, type_id, parmlist, NULL_TREE), declspecs, FIELD, 0, NULL_TREE); if (decl == NULL_TREE) return NULL_TREE; if (TREE_CODE (decl) == FUNCTION_DECL && DECL_CHAIN (decl) != NULL_TREE) { /* Need a fresh node here so that we don't get circularity when we link these together. */ decl = copy_node (decl); } if (decl == void_type_node || (TREE_CODE (decl) == FUNCTION_DECL && TREE_CODE (TREE_TYPE (decl)) != METHOD_TYPE)) /* bunch of friends. */ return decl; if (DECL_IN_AGGR_P (decl)) { cp_error ("`%D' already defined in the class ", decl); return void_type_node; } finish_decl (decl, NULL_TREE, NULL_TREE, 0); /* If this declaration is common to another declaration complain about such redundancy, and return NULL_TREE so that we don't build a circular list. */ if (DECL_CHAIN (decl)) { cp_error ("function `%D' declared twice in class %T", decl, DECL_CONTEXT (decl)); return NULL_TREE; } DECL_IN_AGGR_P (decl) = 1; return decl; } #endif tree grokoptypename (declspecs, declarator) tree declspecs, declarator; { tree t = grokdeclarator (declarator, declspecs, TYPENAME, 0, NULL_TREE); return build_typename_overload (t); } /* When a function is declared with an initializer, do the right thing. Currently, there are two possibilities: class B { public: // initialization possibility #1. virtual void f () = 0; int g (); }; class D1 : B { public: int d1; // error, no f (); }; class D2 : B { public: int d2; void f (); }; class D3 : B { public: int d3; // initialization possibility #2 void f () = B::f; }; */ int copy_assignment_arg_p (parmtype, virtualp) tree parmtype; int virtualp; { if (TREE_CODE (parmtype) == REFERENCE_TYPE) parmtype = TREE_TYPE (parmtype); if ((TYPE_MAIN_VARIANT (parmtype) == current_class_type) || (virtualp && DERIVED_FROM_P (parmtype, current_class_type))) return 1; return 0; } static void grok_function_init (decl, init) tree decl; tree init; { /* An initializer for a function tells how this function should be inherited. */ tree type = TREE_TYPE (decl); if (TREE_CODE (type) == FUNCTION_TYPE) cp_error ("initializer specified for non-member function `%D'", decl); else if (DECL_VINDEX (decl) == NULL_TREE) cp_error ("initializer specified for non-virtual method `%D'", decl); else if (integer_zerop (init)) { #if 0 /* Mark this function as being "defined". */ DECL_INITIAL (decl) = error_mark_node; /* pure virtual destructors must be defined. */ /* pure virtual needs to be defined (as abort) only when put in vtbl. For wellformed call, it should be itself. pr4737 */ if (!DESTRUCTOR_NAME_P (DECL_ASSEMBLER_NAME (decl))) { extern tree abort_fndecl; /* Give this node rtl from `abort'. */ DECL_RTL (decl) = DECL_RTL (abort_fndecl); } #endif DECL_ABSTRACT_VIRTUAL_P (decl) = 1; if (DECL_NAME (decl) == ansi_opname [(int) MODIFY_EXPR]) { tree parmtype = TREE_VALUE (TREE_CHAIN (TYPE_ARG_TYPES (TREE_TYPE (decl)))); if (copy_assignment_arg_p (parmtype, 1)) TYPE_HAS_ABSTRACT_ASSIGN_REF (current_class_type) = 1; } } else if (TREE_CODE (init) == OFFSET_REF && TREE_OPERAND (init, 0) == NULL_TREE && TREE_CODE (TREE_TYPE (init)) == METHOD_TYPE) { tree basetype = DECL_CLASS_CONTEXT (init); tree basefn = TREE_OPERAND (init, 1); if (TREE_CODE (basefn) != FUNCTION_DECL) cp_error ("non-method initializer invalid for method `%D'", decl); else if (! BINFO_OFFSET_ZEROP (TYPE_BINFO (DECL_CLASS_CONTEXT (basefn)))) sorry ("base member function from other than first base class"); else { tree binfo = get_binfo (basetype, TYPE_METHOD_BASETYPE (type), 1); if (binfo == error_mark_node) ; else if (binfo == 0) error_not_base_type (TYPE_METHOD_BASETYPE (TREE_TYPE (init)), TYPE_METHOD_BASETYPE (type)); else { /* Mark this function as being defined, and give it new rtl. */ DECL_INITIAL (decl) = error_mark_node; DECL_RTL (decl) = DECL_RTL (basefn); } } } else cp_error ("invalid initializer for virtual method `%D'", decl); } /* When we get a declaration of the form type cname::fname ... the node for `cname::fname' gets built here in a special way. Namely, we push into `cname's scope. When this declaration is processed, we pop back out. */ tree build_push_scope (cname, name) tree cname; tree name; { extern int current_class_depth; tree ctype, rval; int is_ttp = 0; if (cname == error_mark_node) return error_mark_node; ctype = IDENTIFIER_TYPE_VALUE (cname); if (TREE_CODE (ctype) == TEMPLATE_TYPE_PARM) is_ttp = 1; else if (ctype == NULL_TREE || ! IS_AGGR_TYPE (ctype)) { cp_error ("`%T' not defined as aggregate type", cname); return name; } else if (IS_SIGNATURE (ctype)) { error ("cannot push into signature scope, scope resolution operator ignored"); return name; } rval = build_parse_node (SCOPE_REF, cname, name); /* Don't need to push the scope if we're already in it. We also don't need to push the scope for a ptr-to-member/method. */ if (ctype == current_class_type || TREE_CODE (name) != IDENTIFIER_NODE || is_ttp) return rval; /* We do need to push the scope in this case, since CTYPE helps determine subsequent intializers (i.e., Foo::Bar x = foo_enum_1;). */ push_nested_class (ctype, 3); TREE_COMPLEXITY (rval) = current_class_depth; return rval; } void cplus_decl_attributes (decl, attributes) tree decl, attributes; { if (decl && decl != void_type_node) decl_attributes (decl, attributes); } /* CONSTRUCTOR_NAME: Return the name for the constructor (or destructor) for the specified class. Argument can be RECORD_TYPE, TYPE_DECL, or IDENTIFIER_NODE. When given a template, this routine doesn't lose the specialization. */ tree constructor_name_full (thing) tree thing; { if (TREE_CODE (thing) == UNINSTANTIATED_P_TYPE) return DECL_NAME (UPT_TEMPLATE (thing)); if (IS_AGGR_TYPE_CODE (TREE_CODE (thing))) { if (TYPE_WAS_ANONYMOUS (thing) && TYPE_HAS_CONSTRUCTOR (thing)) thing = DECL_NAME (TREE_VEC_ELT (TYPE_METHODS (thing), 0)); else thing = TYPE_NAME (thing); } if (TREE_CODE (thing) == TYPE_DECL || (TREE_CODE (thing) == TEMPLATE_DECL && DECL_TEMPLATE_IS_CLASS (thing))) thing = DECL_NAME (thing); my_friendly_assert (TREE_CODE (thing) == IDENTIFIER_NODE, 197); return thing; } /* CONSTRUCTOR_NAME: Return the name for the constructor (or destructor) for the specified class. Argument can be RECORD_TYPE, TYPE_DECL, or IDENTIFIER_NODE. When given a template, return the plain unspecialized name. */ tree constructor_name (thing) tree thing; { tree t; thing = constructor_name_full (thing); t = IDENTIFIER_TEMPLATE (thing); if (!t) return thing; t = TREE_PURPOSE (t); return DECL_NAME (t); } /* Cache the value of this class's main virtual function table pointer in a register variable. This will save one indirection if a more than one virtual function call is made this function. */ void setup_vtbl_ptr () { extern rtx base_init_insns; if (base_init_insns == 0 && DECL_CONSTRUCTOR_P (current_function_decl)) emit_base_init (current_class_type, 0); #if 0 /* This has something a little wrong with it. On a sun4, code like: be L6 ld [%i0],%o1 is generated, when the below is used when -O4 is given. The delay slot it filled with an instruction that is safe, when this isn't used, like in: be L6 sethi %hi(LC1),%o0 ld [%i0],%o1 on code like: struct A { virtual void print() { printf("xxx"); } void f(); }; void A::f() { if (this) { print(); } else { printf("0"); } } And that is why this is disabled for now. (mrs) */ if ((flag_this_is_variable & 1) == 0 && optimize && current_class_type && CLASSTYPE_VSIZE (current_class_type) && ! DECL_STATIC_FUNCTION_P (current_function_decl)) { tree vfield = build_vfield_ref (C_C_D, current_class_type); current_vtable_decl = CLASSTYPE_VTBL_PTR (current_class_type); DECL_RTL (current_vtable_decl) = 0; DECL_INITIAL (current_vtable_decl) = error_mark_node; /* Have to cast the initializer, since it may have come from a more base class then we ascribe CURRENT_VTABLE_DECL to be. */ finish_decl (current_vtable_decl, convert_force (TREE_TYPE (current_vtable_decl), vfield), 0, 0); current_vtable_decl = build_indirect_ref (current_vtable_decl, NULL_PTR); } else #endif current_vtable_decl = NULL_TREE; } /* Record the existence of an addressable inline function. */ void mark_inline_for_output (decl) tree decl; { if (DECL_SAVED_INLINE (decl)) return; DECL_SAVED_INLINE (decl) = 1; if (DECL_PENDING_INLINE_INFO (decl) != 0 && ! DECL_PENDING_INLINE_INFO (decl)->deja_vu) { struct pending_inline *t = pending_inlines; my_friendly_assert (DECL_SAVED_INSNS (decl) == 0, 198); while (t) { if (t == DECL_PENDING_INLINE_INFO (decl)) break; t = t->next; } if (t == 0) { t = DECL_PENDING_INLINE_INFO (decl); t->next = pending_inlines; pending_inlines = t; } DECL_PENDING_INLINE_INFO (decl) = 0; } saved_inlines = perm_tree_cons (NULL_TREE, decl, saved_inlines); } void clear_temp_name () { temp_name_counter = 0; } /* Hand off a unique name which can be used for variable we don't really want to know about anyway, for example, the anonymous variables which are needed to make references work. Declare this thing so we can use it. The variable created will be of type TYPE. STATICP is nonzero if this variable should be static. */ tree get_temp_name (type, staticp) tree type; int staticp; { char buf[sizeof (AUTO_TEMP_FORMAT) + 20]; tree decl; int toplev = global_bindings_p (); push_obstacks_nochange (); if (toplev || staticp) { end_temporary_allocation (); sprintf (buf, AUTO_TEMP_FORMAT, global_temp_name_counter++); decl = pushdecl_top_level (build_decl (VAR_DECL, get_identifier (buf), type)); } else { sprintf (buf, AUTO_TEMP_FORMAT, temp_name_counter++); decl = pushdecl (build_decl (VAR_DECL, get_identifier (buf), type)); } TREE_USED (decl) = 1; TREE_STATIC (decl) = staticp; /* If this is a local variable, then lay out its rtl now. Otherwise, callers of this function are responsible for dealing with this variable's rtl. */ if (! toplev) { expand_decl (decl); expand_decl_init (decl); } pop_obstacks (); return decl; } /* Get a variable which we can use for multiple assignments. It is not entered into current_binding_level, because that breaks things when it comes time to do final cleanups (which take place "outside" the binding contour of the function). */ tree get_temp_regvar (type, init) tree type, init; { static char buf[sizeof (AUTO_TEMP_FORMAT) + 20] = { '_' }; tree decl; sprintf (buf+1, AUTO_TEMP_FORMAT, temp_name_counter++); decl = build_decl (VAR_DECL, get_identifier (buf), type); TREE_USED (decl) = 1; DECL_REGISTER (decl) = 1; if (init) store_init_value (decl, init); /* We can expand these without fear, since they cannot need constructors or destructors. */ expand_decl (decl); expand_decl_init (decl); if (type_needs_gc_entry (type)) DECL_GC_OFFSET (decl) = size_int (++current_function_obstack_index); return decl; } /* Make the macro TEMP_NAME_P available to units which do not include c-tree.h. */ int temp_name_p (decl) tree decl; { return TEMP_NAME_P (decl); } /* Finish off the processing of a UNION_TYPE structure. If there are static members, then all members are static, and must be laid out together. If the union is an anonymous union, we arrange for that as well. PUBLIC_P is nonzero if this union is not declared static. */ void finish_anon_union (anon_union_decl) tree anon_union_decl; { tree type = TREE_TYPE (anon_union_decl); tree field, main_decl = NULL_TREE; tree elems = NULL_TREE; int public_p = TREE_PUBLIC (anon_union_decl); int static_p = TREE_STATIC (anon_union_decl); int external_p = DECL_EXTERNAL (anon_union_decl); if ((field = TYPE_FIELDS (type)) == NULL_TREE) return; if (public_p) { error ("global anonymous unions must be declared static"); return; } for (; field; field = TREE_CHAIN (field)) { tree decl; if (TREE_CODE (field) != FIELD_DECL) continue; decl = build_decl (VAR_DECL, DECL_NAME (field), TREE_TYPE (field)); /* tell `pushdecl' that this is not tentative. */ DECL_INITIAL (decl) = error_mark_node; TREE_PUBLIC (decl) = public_p; TREE_STATIC (decl) = static_p; DECL_EXTERNAL (decl) = external_p; decl = pushdecl (decl); /* Only write out one anon union element--choose the one that can hold them all. */ if (main_decl == NULL_TREE && simple_cst_equal (DECL_SIZE (decl), DECL_SIZE (anon_union_decl))) { main_decl = decl; } else { /* ??? This causes there to be no debug info written out about this decl. */ TREE_ASM_WRITTEN (decl) = 1; } DECL_INITIAL (decl) = NULL_TREE; /* If there's a cleanup to do, it belongs in the TREE_PURPOSE of the following TREE_LIST. */ elems = tree_cons (NULL_TREE, decl, elems); TREE_TYPE (elems) = type; } if (static_p) { if (main_decl) { make_decl_rtl (main_decl, 0, global_bindings_p ()); DECL_RTL (anon_union_decl) = DECL_RTL (main_decl); } else { warning ("anonymous union with no members"); return; } } /* The following call assumes that there are never any cleanups for anonymous unions--a reasonable assumption. */ expand_anon_union_decl (anon_union_decl, NULL_TREE, elems); if (flag_cadillac) cadillac_finish_anon_union (anon_union_decl); } /* Finish and output a table which is generated by the compiler. NAME is the name to give the table. TYPE is the type of the table entry. INIT is all the elements in the table. PUBLICP is non-zero if this table should be given external access. */ tree finish_table (name, type, init, publicp) tree name, type, init; int publicp; { tree itype, atype, decl; static tree empty_table; int is_empty = 0; tree asmspec; itype = build_index_type (size_int (list_length (init) - 1)); atype = build_cplus_array_type (type, itype); layout_type (atype); if (TREE_VALUE (init) == integer_zero_node && TREE_CHAIN (init) == NULL_TREE) { if (empty_table == NULL_TREE) { empty_table = get_temp_name (atype, 1); init = build (CONSTRUCTOR, atype, NULL_TREE, init); TREE_CONSTANT (init) = 1; TREE_STATIC (init) = 1; DECL_INITIAL (empty_table) = init; asmspec = build_string (IDENTIFIER_LENGTH (DECL_NAME (empty_table)), IDENTIFIER_POINTER (DECL_NAME (empty_table))); finish_decl (empty_table, init, asmspec, 0); } is_empty = 1; } if (name == NULL_TREE) { if (is_empty) return empty_table; decl = get_temp_name (atype, 1); } else { decl = build_decl (VAR_DECL, name, atype); decl = pushdecl (decl); TREE_STATIC (decl) = 1; } if (is_empty == 0) { TREE_PUBLIC (decl) = publicp; init = build (CONSTRUCTOR, atype, NULL_TREE, init); TREE_CONSTANT (init) = 1; TREE_STATIC (init) = 1; DECL_INITIAL (decl) = init; asmspec = build_string (IDENTIFIER_LENGTH (DECL_NAME (decl)), IDENTIFIER_POINTER (DECL_NAME (decl))); } else { /* This will cause DECL to point to EMPTY_TABLE in rtl-land. */ DECL_EXTERNAL (decl) = 1; TREE_STATIC (decl) = 0; init = 0; asmspec = build_string (IDENTIFIER_LENGTH (DECL_NAME (empty_table)), IDENTIFIER_POINTER (DECL_NAME (empty_table))); } finish_decl (decl, init, asmspec, 0); return decl; } /* Finish processing a builtin type TYPE. It's name is NAME, its fields are in the array FIELDS. LEN is the number of elements in FIELDS minus one, or put another way, it is the maximum subscript used in FIELDS. It is given the same alignment as ALIGN_TYPE. */ void finish_builtin_type (type, name, fields, len, align_type) tree type; char *name; tree fields[]; int len; tree align_type; { register int i; TYPE_FIELDS (type) = fields[0]; for (i = 0; i < len; i++) { layout_type (TREE_TYPE (fields[i])); DECL_FIELD_CONTEXT (fields[i]) = type; TREE_CHAIN (fields[i]) = fields[i+1]; } DECL_FIELD_CONTEXT (fields[i]) = type; DECL_CLASS_CONTEXT (fields[i]) = type; TYPE_ALIGN (type) = TYPE_ALIGN (align_type); layout_type (type); #if 0 /* not yet, should get fixed properly later */ TYPE_NAME (type) = make_type_decl (get_identifier (name), type); #else TYPE_NAME (type) = build_decl (TYPE_DECL, get_identifier (name), type); #endif layout_decl (TYPE_NAME (type), 0); } /* Auxiliary functions to make type signatures for `operator new' and `operator delete' correspond to what compiler will be expecting. */ extern tree sizetype; tree coerce_new_type (type) tree type; { int e1 = 0, e2 = 0; if (TREE_CODE (type) == METHOD_TYPE) type = build_function_type (TREE_TYPE (type), TREE_CHAIN (TYPE_ARG_TYPES (type))); if (TREE_TYPE (type) != ptr_type_node) e1 = 1, error ("`operator new' must return type `void *'"); /* Technically the type must be `size_t', but we may not know what that is. */ if (TYPE_ARG_TYPES (type) == NULL_TREE) e1 = 1, error ("`operator new' takes type `size_t' parameter"); else if (TREE_CODE (TREE_VALUE (TYPE_ARG_TYPES (type))) != INTEGER_TYPE || TYPE_PRECISION (TREE_VALUE (TYPE_ARG_TYPES (type))) != TYPE_PRECISION (sizetype)) e2 = 1, error ("`operator new' takes type `size_t' as first parameter"); if (e2) type = build_function_type (ptr_type_node, tree_cons (NULL_TREE, sizetype, TREE_CHAIN (TYPE_ARG_TYPES (type)))); else if (e1) type = build_function_type (ptr_type_node, TYPE_ARG_TYPES (type)); return type; } tree coerce_delete_type (type) tree type; { int e1 = 0, e2 = 0, e3 = 0; tree arg_types = TYPE_ARG_TYPES (type); if (TREE_CODE (type) == METHOD_TYPE) { type = build_function_type (TREE_TYPE (type), TREE_CHAIN (arg_types)); arg_types = TREE_CHAIN (arg_types); } if (TREE_TYPE (type) != void_type_node) e1 = 1, error ("`operator delete' must return type `void'"); if (arg_types == NULL_TREE || TREE_VALUE (arg_types) != ptr_type_node) e2 = 1, error ("`operator delete' takes type `void *' as first parameter"); if (arg_types && TREE_CHAIN (arg_types) && TREE_CHAIN (arg_types) != void_list_node) { /* Again, technically this argument must be `size_t', but again we may not know what that is. */ tree t2 = TREE_VALUE (TREE_CHAIN (arg_types)); if (TREE_CODE (t2) != INTEGER_TYPE || TYPE_PRECISION (t2) != TYPE_PRECISION (sizetype)) e3 = 1, error ("second argument to `operator delete' must be of type `size_t'"); else if (TREE_CHAIN (TREE_CHAIN (arg_types)) != void_list_node) { e3 = 1; if (TREE_CHAIN (TREE_CHAIN (arg_types))) error ("too many arguments in declaration of `operator delete'"); else error ("`...' invalid in specification of `operator delete'"); } } if (e3) arg_types = tree_cons (NULL_TREE, ptr_type_node, build_tree_list (NULL_TREE, sizetype)); else if (e3 |= e2) { if (arg_types == NULL_TREE) arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node); else arg_types = tree_cons (NULL_TREE, ptr_type_node, TREE_CHAIN (arg_types)); } else e3 |= e1; if (e3) type = build_function_type (void_type_node, arg_types); return type; } static void mark_vtable_entries (decl) tree decl; { tree entries = TREE_CHAIN (CONSTRUCTOR_ELTS (DECL_INITIAL (decl))); if (flag_dossier) entries = TREE_CHAIN (entries); for (; entries; entries = TREE_CHAIN (entries)) { tree fnaddr = FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (entries)); tree fn = TREE_OPERAND (fnaddr, 0); TREE_ADDRESSABLE (fn) = 1; if (DECL_ABSTRACT_VIRTUAL_P (fn)) { extern tree abort_fndecl; if (flag_vtable_thunks) fnaddr = TREE_VALUE (entries); TREE_OPERAND (fnaddr, 0) = abort_fndecl; } } } /* Set TREE_PUBLIC and/or TREE_EXTERN on the vtable DECL, based on TYPE and other static flags. Note that anything public is tagged TREE_PUBLIC, whether it's public in this file or in another one. */ void import_export_vtable (decl, type) tree decl, type; { if (write_virtuals >= 2 || CLASSTYPE_TEMPLATE_INSTANTIATION (type)) { if (CLASSTYPE_INTERFACE_KNOWN (type)) { TREE_PUBLIC (decl) = 1; DECL_EXTERNAL (decl) = ! CLASSTYPE_VTABLE_NEEDS_WRITING (type); } } else if (write_virtuals != 0) { TREE_PUBLIC (decl) = 1; if (write_virtuals < 0) DECL_EXTERNAL (decl) = 1; } } static void import_export_template (type) tree type; { if (CLASSTYPE_IMPLICIT_INSTANTIATION (type) && ! flag_implicit_templates && CLASSTYPE_INTERFACE_UNKNOWN (type)) { SET_CLASSTYPE_INTERFACE_KNOWN (type); CLASSTYPE_INTERFACE_ONLY (type) = 1; CLASSTYPE_VTABLE_NEEDS_WRITING (type) = 0; } } static void finish_vtable_vardecl (prev, vars) tree prev, vars; { tree ctype = DECL_CONTEXT (vars); import_export_template (ctype); import_export_vtable (vars, ctype); if (flag_vtable_thunks && !CLASSTYPE_INTERFACE_KNOWN (ctype)) { tree method; for (method = CLASSTYPE_METHODS (ctype); method != NULL_TREE; method = DECL_NEXT_METHOD (method)) { if (DECL_VINDEX (method) != NULL_TREE && !DECL_SAVED_INSNS (method) && !DECL_ABSTRACT_VIRTUAL_P (method)) { SET_CLASSTYPE_INTERFACE_KNOWN (ctype); CLASSTYPE_INTERFACE_ONLY (ctype) = DECL_EXTERNAL (method); TREE_PUBLIC (vars) = 1; DECL_EXTERNAL (vars) = DECL_EXTERNAL (method); break; } } } if (write_virtuals >= 0 && ! DECL_EXTERNAL (vars) && (TREE_PUBLIC (vars) || TREE_USED (vars))) { extern tree the_null_vtable_entry; /* Stuff this virtual function table's size into `pfn' slot of `the_null_vtable_entry'. */ tree nelts = array_type_nelts (TREE_TYPE (vars)); if (flag_vtable_thunks) TREE_VALUE (CONSTRUCTOR_ELTS (DECL_INITIAL (vars))) = nelts; else SET_FNADDR_FROM_VTABLE_ENTRY (the_null_vtable_entry, nelts); /* Kick out the dossier before writing out the vtable. */ if (flag_dossier) rest_of_decl_compilation (TREE_OPERAND (FNADDR_FROM_VTABLE_ENTRY (TREE_VALUE (TREE_CHAIN (CONSTRUCTOR_ELTS (DECL_INITIAL (vars))))), 0), 0, 1, 1); /* Write it out. */ mark_vtable_entries (vars); if (TREE_TYPE (DECL_INITIAL (vars)) == 0) store_init_value (vars, DECL_INITIAL (vars)); #ifdef DWARF_DEBUGGING_INFO if (write_symbols == DWARF_DEBUG) { /* Mark the VAR_DECL node representing the vtable itself as a "gratuitous" one, thereby forcing dwarfout.c to ignore it. It is rather important that such things be ignored because any effort to actually generate DWARF for them will run into trouble when/if we encounter code like: #pragma interface struct S { virtual void member (); }; because the artificial declaration of the vtable itself (as manufactured by the g++ front end) will say that the vtable is a static member of `S' but only *after* the debug output for the definition of `S' has already been output. This causes grief because the DWARF entry for the definition of the vtable will try to refer back to an earlier *declaration* of the vtable as a static member of `S' and there won't be one. We might be able to arrange to have the "vtable static member" attached to the member list for `S' before the debug info for `S' get written (which would solve the problem) but that would require more intrusive changes to the g++ front end. */ DECL_IGNORED_P (vars) = 1; } #endif /* DWARF_DEBUGGING_INFO */ rest_of_decl_compilation (vars, NULL_PTR, 1, 1); } else if (TREE_USED (vars) && flag_vtable_thunks) assemble_external (vars); /* We know that PREV must be non-zero here. */ TREE_CHAIN (prev) = TREE_CHAIN (vars); } void walk_vtables (typedecl_fn, vardecl_fn) register void (*typedecl_fn)(); register void (*vardecl_fn)(); { tree prev, vars; for (prev = 0, vars = getdecls (); vars; vars = TREE_CHAIN (vars)) { register tree type = TREE_TYPE (vars); if (TREE_CODE (vars) == TYPE_DECL && type != error_mark_node && TYPE_LANG_SPECIFIC (type) && CLASSTYPE_VSIZE (type)) { if (typedecl_fn) (*typedecl_fn) (prev, vars); } else if (TREE_CODE (vars) == VAR_DECL && DECL_VIRTUAL_P (vars)) { if (vardecl_fn) (*vardecl_fn) (prev, vars); } else prev = vars; } } static void finish_sigtable_vardecl (prev, vars) tree prev, vars; { /* We don't need to mark sigtable entries as addressable here as is done for vtables. Since sigtables, unlike vtables, are always written out, that was already done in build_signature_table_constructor. */ rest_of_decl_compilation (vars, NULL_PTR, 1, 1); /* We know that PREV must be non-zero here. */ TREE_CHAIN (prev) = TREE_CHAIN (vars); } void walk_sigtables (typedecl_fn, vardecl_fn) register void (*typedecl_fn)(); register void (*vardecl_fn)(); { tree prev, vars; for (prev = 0, vars = getdecls (); vars; vars = TREE_CHAIN (vars)) { register tree type = TREE_TYPE (vars); if (TREE_CODE (vars) == TYPE_DECL && type != error_mark_node && IS_SIGNATURE (type)) { if (typedecl_fn) (*typedecl_fn) (prev, vars); } else if (TREE_CODE (vars) == VAR_DECL && TREE_TYPE (vars) != error_mark_node && IS_SIGNATURE (TREE_TYPE (vars))) { if (vardecl_fn) (*vardecl_fn) (prev, vars); } else prev = vars; } } /* Determines the proper settings of TREE_PUBLIC and DECL_EXTERNAL for an inline function at end-of-file. */ void import_export_inline (decl) tree decl; { if (TREE_PUBLIC (decl)) return; /* If an explicit instantiation doesn't have TREE_PUBLIC set, it was with 'extern'. */ if (DECL_EXPLICIT_INSTANTIATION (decl) || (DECL_IMPLICIT_INSTANTIATION (decl) && ! flag_implicit_templates)) { TREE_PUBLIC (decl) = 1; DECL_EXTERNAL (decl) = 1; } else if (DECL_FUNCTION_MEMBER_P (decl)) { tree ctype = DECL_CLASS_CONTEXT (decl); if (CLASSTYPE_INTERFACE_KNOWN (ctype)) { TREE_PUBLIC (decl) = 1; DECL_EXTERNAL (decl) = (CLASSTYPE_INTERFACE_ONLY (ctype) || (DECL_INLINE (decl) && ! flag_implement_inlines)); } } } extern int parse_time, varconst_time; #define TIMEVAR(VAR, BODY) \ do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0) /* This routine is called from the last rule in yyparse (). Its job is to create all the code needed to initialize and destroy the global aggregates. We do the destruction first, since that way we only need to reverse the decls once. */ void finish_file () { extern int lineno; int start_time, this_time; tree fnname; tree vars = static_aggregates; int needs_cleaning = 0, needs_messing_up = 0; int have_exception_handlers = build_exception_table (); if (flag_detailed_statistics) dump_tree_statistics (); /* Bad parse errors. Just forget about it. */ if (! global_bindings_p () || current_class_type) return; start_time = get_run_time (); /* Push into C language context, because that's all we'll need here. */ push_lang_context (lang_name_c); /* Set up the name of the file-level functions we may need. */ /* Use a global object (which is already required to be unique over the program) rather than the file name (which imposes extra constraints). -- Raeburn@MIT.EDU, 10 Jan 1990. */ /* See if we really need the hassle. */ while (vars && needs_cleaning == 0) { tree decl = TREE_VALUE (vars); tree type = TREE_TYPE (decl); if (TYPE_NEEDS_DESTRUCTOR (type)) { needs_cleaning = 1; needs_messing_up = 1; break; } else needs_messing_up |= TYPE_NEEDS_CONSTRUCTING (type); vars = TREE_CHAIN (vars); } if (needs_cleaning == 0) goto mess_up; /* Otherwise, GDB can get confused, because in only knows about source for LINENO-1 lines. */ lineno -= 1; fnname = get_file_function_name ('D'); start_function (void_list_node, build_parse_node (CALL_EXPR, fnname, void_list_node, NULL_TREE), 0, 0); fnname = DECL_ASSEMBLER_NAME (current_function_decl); store_parm_decls (); pushlevel (0); clear_last_expr (); push_momentary (); expand_start_bindings (0); /* These must be done in backward order to destroy, in which they happen to be! */ while (vars) { tree decl = TREE_VALUE (vars); tree type = TREE_TYPE (decl); tree temp = TREE_PURPOSE (vars); if (TYPE_NEEDS_DESTRUCTOR (type)) { if (TREE_STATIC (vars)) expand_start_cond (build_binary_op (NE_EXPR, temp, integer_zero_node, 1), 0); if (TREE_CODE (type) == ARRAY_TYPE) temp = decl; else { mark_addressable (decl); temp = build1 (ADDR_EXPR, TYPE_POINTER_TO (type), decl); } temp = build_delete (TREE_TYPE (temp), temp, integer_two_node, LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0); expand_expr_stmt (temp); if (TREE_STATIC (vars)) expand_end_cond (); } vars = TREE_CHAIN (vars); } expand_end_bindings (getdecls(), 1, 0); poplevel (1, 0, 0); pop_momentary (); finish_function (lineno, 0); assemble_destructor (IDENTIFIER_POINTER (fnname)); /* if it needed cleaning, then it will need messing up: drop through */ mess_up: /* Must do this while we think we are at the top level. */ vars = nreverse (static_aggregates); if (vars != NULL_TREE || have_exception_handlers) { fnname = get_file_function_name ('I'); start_function (void_list_node, build_parse_node (CALL_EXPR, fnname, void_list_node, NULL_TREE), 0, 0); fnname = DECL_ASSEMBLER_NAME (current_function_decl); store_parm_decls (); pushlevel (0); clear_last_expr (); push_momentary (); expand_start_bindings (0); if (have_exception_handlers) register_exception_table (); while (vars) { tree decl = TREE_VALUE (vars); tree init = TREE_PURPOSE (vars); tree old_cleanups = cleanups_this_call; /* If this was a static attribute within some function's scope, then don't initialize it here. Also, don't bother with initializers that contain errors. */ if (TREE_STATIC (vars) || (init && TREE_CODE (init) == TREE_LIST && value_member (error_mark_node, init))) { vars = TREE_CHAIN (vars); continue; } if (TREE_CODE (decl) == VAR_DECL) { /* Set these global variables so that GDB at least puts us near the declaration which required the initialization. */ input_filename = DECL_SOURCE_FILE (decl); lineno = DECL_SOURCE_LINE (decl); emit_note (input_filename, lineno); /* 9.5p5: The initializer of a static member of a class has the same acess rights as a member function. */ DECL_CLASS_CONTEXT (current_function_decl) = DECL_CONTEXT (decl); if (init) { if (TREE_CODE (init) == VAR_DECL) { /* This behavior results when there are multiple declarations of an aggregate, the last of which defines it. */ if (DECL_RTL (init) == DECL_RTL (decl)) { my_friendly_assert (DECL_INITIAL (decl) == error_mark_node || (TREE_CODE (DECL_INITIAL (decl)) == CONSTRUCTOR && CONSTRUCTOR_ELTS (DECL_INITIAL (decl)) == NULL_TREE), 199); init = DECL_INITIAL (init); if (TREE_CODE (init) == CONSTRUCTOR && CONSTRUCTOR_ELTS (init) == NULL_TREE) init = NULL_TREE; } #if 0 else if (TREE_TYPE (decl) == TREE_TYPE (init)) { #if 1 my_friendly_abort (200); #else /* point to real decl's rtl anyway. */ DECL_RTL (init) = DECL_RTL (decl); my_friendly_assert (DECL_INITIAL (decl) == error_mark_node, 201); init = DECL_INITIAL (init); #endif /* 1 */ } #endif /* 0 */ } } if (IS_AGGR_TYPE (TREE_TYPE (decl)) || TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE) expand_aggr_init (decl, init, 0); else if (TREE_CODE (init) == TREE_VEC) { expand_expr (expand_vec_init (decl, TREE_VEC_ELT (init, 0), TREE_VEC_ELT (init, 1), TREE_VEC_ELT (init, 2), 0), const0_rtx, VOIDmode, 0); free_temp_slots (); } else expand_assignment (decl, init, 0, 0); DECL_CLASS_CONTEXT (current_function_decl) = NULL_TREE; } else if (TREE_CODE (decl) == SAVE_EXPR) { if (! PARM_DECL_EXPR (decl)) { /* a `new' expression at top level. */ expand_expr (decl, const0_rtx, VOIDmode, 0); free_temp_slots (); expand_aggr_init (build_indirect_ref (decl, NULL_PTR), init, 0); } } else if (decl == error_mark_node) ; else my_friendly_abort (22); vars = TREE_CHAIN (vars); /* Cleanup any temporaries needed for the initial value. */ expand_cleanups_to (old_cleanups); } expand_end_bindings (getdecls(), 1, 0); poplevel (1, 0, 0); pop_momentary (); finish_function (lineno, 0); assemble_constructor (IDENTIFIER_POINTER (fnname)); } /* Done with C language context needs. */ pop_lang_context (); /* Now write out any static class variables (which may have since learned how to be initialized). */ while (pending_statics) { tree decl = TREE_VALUE (pending_statics); if (TREE_USED (decl) == 1 || TREE_READONLY (decl) == 0 || DECL_INITIAL (decl) == 0) rest_of_decl_compilation (decl, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), 1, 1); pending_statics = TREE_CHAIN (pending_statics); } this_time = get_run_time (); parse_time -= this_time - start_time; varconst_time += this_time - start_time; start_time = get_run_time (); /* Now delete from the chain of variables all virtual function tables. We output them all ourselves, because each will be treated specially. */ #if 1 /* The reason for pushing garbage onto the global_binding_level is to ensure that we can slice out _DECLs which pertain to virtual function tables. If the last thing pushed onto the global_binding_level was a virtual function table, then slicing it out would slice away all the decls (i.e., we lose the head of the chain). There are several ways of getting the same effect, from changing the way that iterators over the chain treat the elements that pertain to virtual function tables, moving the implementation of this code to decl.c (where we can manipulate global_binding_level directly), popping the garbage after pushing it and slicing away the vtable stuff, or just leaving it alone. */ /* Make last thing in global scope not be a virtual function table. */ #if 0 /* not yet, should get fixed properly later */ vars = make_type_decl (get_identifier (" @%$#@!"), integer_type_node); #else vars = build_decl (TYPE_DECL, get_identifier (" @%$#@!"), integer_type_node); #endif DECL_IGNORED_P (vars) = 1; SET_DECL_ARTIFICIAL (vars); pushdecl (vars); #endif walk_vtables ((void (*)())0, finish_vtable_vardecl); if (flag_handle_signatures) walk_sigtables ((void (*)())0, finish_sigtable_vardecl); for (vars = getdecls (); vars; vars = TREE_CHAIN (vars)) { if (TREE_CODE (vars) == THUNK_DECL) emit_thunk (vars); } { int reconsider = 0; /* More may be referenced; check again */ tree delayed = NULL_TREE; /* These might be referenced later */ /* Now write out inline functions which had their addresses taken and which were not declared virtual and which were not declared `extern inline'. */ while (saved_inlines) { tree decl = TREE_VALUE (saved_inlines); saved_inlines = TREE_CHAIN (saved_inlines); /* Redefinition of a member function can cause DECL_SAVED_INSNS to be 0; don't crash. */ if (TREE_ASM_WRITTEN (decl) || DECL_SAVED_INSNS (decl) == 0) continue; import_export_inline (decl); if (TREE_PUBLIC (decl) || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) || flag_keep_inline_functions) { if (DECL_EXTERNAL (decl)) assemble_external (decl); else { reconsider = 1; temporary_allocation (); output_inline_function (decl); permanent_allocation (1); } } else if (TREE_USED (decl) || TREE_USED (DECL_ASSEMBLER_NAME (decl))) delayed = tree_cons (NULL_TREE, decl, delayed); } if (reconsider && delayed) { while (reconsider) { tree place; reconsider = 0; for (place = delayed; place; place = TREE_CHAIN (place)) { tree decl = TREE_VALUE (place); if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) && ! TREE_ASM_WRITTEN (decl)) { if (DECL_EXTERNAL (decl)) assemble_external (decl); else { reconsider = 1; temporary_allocation (); output_inline_function (decl); permanent_allocation (1); } } } } } } if (write_virtuals == 2) { /* Now complain about an virtual function tables promised but not delivered. */ while (pending_vtables) { if (TREE_PURPOSE (pending_vtables) == NULL_TREE) error ("virtual function table for `%s' not defined", IDENTIFIER_POINTER (TREE_VALUE (pending_vtables))); pending_vtables = TREE_CHAIN (pending_vtables); } } permanent_allocation (1); this_time = get_run_time (); parse_time -= this_time - start_time; varconst_time += this_time - start_time; if (flag_detailed_statistics) dump_time_statistics (); } /* This is something of the form 'A()()()()()+1' that has turned out to be an expr. Since it was parsed like a type, we need to wade through and fix that. Unfortunately, since operator() is left-associative, we can't use tail recursion. In the above example, TYPE is `A', and DECL is `()()()()()'. Maybe this shouldn't be recursive, but how often will it actually be used? (jason) */ tree reparse_absdcl_as_expr (type, decl) tree type, decl; { /* do build_functional_cast (type, NULL_TREE) at bottom */ if (TREE_OPERAND (decl, 0) == NULL_TREE) return build_functional_cast (type, NULL_TREE); /* recurse */ decl = reparse_decl_as_expr (type, TREE_OPERAND (decl, 0)); decl = build_x_function_call (decl, NULL_TREE, current_class_decl); if (TREE_CODE (decl) == CALL_EXPR && TREE_TYPE (decl) != void_type_node) decl = require_complete_type (decl); return decl; } /* This is something of the form `int ((int)(int)(int)1)' that has turned out to be an expr. Since it was parsed like a type, we need to wade through and fix that. Since casts are right-associative, we are reversing the order, so we don't have to recurse. In the above example, DECL is the `(int)(int)(int)', and EXPR is the `1'. */ tree reparse_absdcl_as_casts (decl, expr) tree decl, expr; { tree type; if (TREE_CODE (expr) == CONSTRUCTOR) { type = groktypename (TREE_VALUE (TREE_OPERAND (decl, 1))); decl = TREE_OPERAND (decl, 0); if (IS_SIGNATURE (type)) { error ("cast specifies signature type"); return error_mark_node; } expr = digest_init (type, expr, (tree *) 0); if (TREE_CODE (type) == ARRAY_TYPE && TYPE_SIZE (type) == 0) { int failure = complete_array_type (type, expr, 1); if (failure) my_friendly_abort (78); } } while (decl) { type = groktypename (TREE_VALUE (TREE_OPERAND (decl, 1))); decl = TREE_OPERAND (decl, 0); expr = build_c_cast (type, expr); } return expr; } /* Recursive helper function for reparse_decl_as_expr. It may be a good idea to reimplement this using an explicit stack, rather than recursion. */ static tree reparse_decl_as_expr1 (decl) tree decl; { switch (TREE_CODE (decl)) { case IDENTIFIER_NODE: return do_identifier (decl); case INDIRECT_REF: return build_x_indirect_ref (reparse_decl_as_expr1 (TREE_OPERAND (decl, 0)), "unary *"); case ADDR_EXPR: return build_x_unary_op (ADDR_EXPR, reparse_decl_as_expr1 (TREE_OPERAND (decl, 0))); case BIT_NOT_EXPR: return build_x_unary_op (BIT_NOT_EXPR, reparse_decl_as_expr1 (TREE_OPERAND (decl, 0))); case SCOPE_REF: return build_offset_ref (TREE_OPERAND (decl, 0), TREE_OPERAND (decl, 1)); case ARRAY_REF: return grok_array_decl (reparse_decl_as_expr1 (TREE_OPERAND (decl, 0)), TREE_OPERAND (decl, 1)); default: my_friendly_abort (5); return NULL_TREE; } } /* This is something of the form `int (*a)++' that has turned out to be an expr. It was only converted into parse nodes, so we need to go through and build up the semantics. Most of the work is done by reparse_decl_as_expr1, above. In the above example, TYPE is `int' and DECL is `*a'. */ tree reparse_decl_as_expr (type, decl) tree type, decl; { decl = build_tree_list (NULL_TREE, reparse_decl_as_expr1 (decl)); return build_functional_cast (type, decl); } /* This is something of the form `int (*a)' that has turned out to be a decl. It was only converted into parse nodes, so we need to do the checking that make_{pointer,reference}_declarator do. */ tree finish_decl_parsing (decl) tree decl; { extern int current_class_depth; switch (TREE_CODE (decl)) { case IDENTIFIER_NODE: return decl; case INDIRECT_REF: return make_pointer_declarator (NULL_TREE, finish_decl_parsing (TREE_OPERAND (decl, 0))); case ADDR_EXPR: return make_reference_declarator (NULL_TREE, finish_decl_parsing (TREE_OPERAND (decl, 0))); case BIT_NOT_EXPR: TREE_OPERAND (decl, 0) = finish_decl_parsing (TREE_OPERAND (decl, 0)); return decl; case SCOPE_REF: push_nested_class (TREE_TYPE (TREE_OPERAND (decl, 0)), 3); TREE_COMPLEXITY (decl) = current_class_depth; return decl; case ARRAY_REF: TREE_OPERAND (decl, 0) = finish_decl_parsing (TREE_OPERAND (decl, 0)); return decl; default: my_friendly_abort (5); return NULL_TREE; } } tree check_cp_case_value (value) tree value; { if (value == NULL_TREE) return value; /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. Strip such NOP_EXPRs. */ if (TREE_CODE (value) == NOP_EXPR && TREE_TYPE (value) == TREE_TYPE (TREE_OPERAND (value, 0))) value = TREE_OPERAND (value, 0); if (TREE_READONLY_DECL_P (value)) { value = decl_constant_value (value); /* build_c_cast puts on a NOP_EXPR to make a non-lvalue. Strip such NOP_EXPRs. */ if (TREE_CODE (value) == NOP_EXPR && TREE_TYPE (value) == TREE_TYPE (TREE_OPERAND (value, 0))) value = TREE_OPERAND (value, 0); } value = fold (value); if (TREE_CODE (value) != INTEGER_CST && value != error_mark_node) { cp_error ("case label `%E' does not reduce to an integer constant", value); value = error_mark_node; } else /* Promote char or short to int. */ value = default_conversion (value); constant_expression_warning (value); return value; }