/* The lang_hooks data structure. Copyright 2001, 2002 Free Software Foundation, Inc. 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifndef GCC_LANG_HOOKS_H #define GCC_LANG_HOOKS_H /* This file should be #include-d after tree.h. */ struct diagnostic_context; /* A print hook for print_tree (). */ typedef void (*lang_print_tree_hook) PARAMS ((FILE *, tree, int indent)); /* The following hooks are documented in langhooks.c. Must not be NULL. */ struct lang_hooks_for_tree_inlining { union tree_node *(*walk_subtrees) PARAMS ((union tree_node **, int *, union tree_node *(*) (union tree_node **, int *, void *), void *, void *)); int (*cannot_inline_tree_fn) PARAMS ((union tree_node **)); int (*disregard_inline_limits) PARAMS ((union tree_node *)); union tree_node *(*add_pending_fn_decls) PARAMS ((void *, union tree_node *)); int (*tree_chain_matters_p) PARAMS ((union tree_node *)); int (*auto_var_in_fn_p) PARAMS ((union tree_node *, union tree_node *)); union tree_node *(*copy_res_decl_for_inlining) PARAMS ((union tree_node *, union tree_node *, union tree_node *, void *, int *, void *)); int (*anon_aggr_type_p) PARAMS ((union tree_node *)); bool (*var_mod_type_p) PARAMS ((union tree_node *)); int (*start_inlining) PARAMS ((union tree_node *)); void (*end_inlining) PARAMS ((union tree_node *)); union tree_node *(*convert_parm_for_inlining) PARAMS ((union tree_node *, union tree_node *, union tree_node *)); }; /* Lang hooks for management of language-specific data or status when entering / leaving functions etc. */ struct lang_hooks_for_functions { /* Called when entering a function. */ void (*init) PARAMS ((struct function *)); /* Called when leaving a function. */ void (*final) PARAMS ((struct function *)); /* Called when entering a nested function. */ void (*enter_nested) PARAMS ((struct function *)); /* Called when leaving a nested function. */ void (*leave_nested) PARAMS ((struct function *)); }; /* The following hooks are used by tree-dump.c. */ struct lang_hooks_for_tree_dump { /* Dump language-specific parts of tree nodes. Returns nonzero if it does not want the usual dumping of the second argument. */ int (*dump_tree) PARAMS ((void *, tree)); /* Determine type qualifiers in a language-specific way. */ int (*type_quals) PARAMS ((tree)); }; /* Hooks related to types. */ struct lang_hooks_for_types { /* Return a new type (with the indicated CODE), doing whatever language-specific processing is required. */ tree (*make_type) PARAMS ((enum tree_code)); /* Given MODE and UNSIGNEDP, return a suitable type-tree with that mode. */ tree (*type_for_mode) PARAMS ((enum machine_mode, int)); /* Given PRECISION and UNSIGNEDP, return a suitable type-tree for an integer type with at least that precision. */ tree (*type_for_size) PARAMS ((unsigned, int)); /* Given an integer type T, return a type like T but unsigned. If T is unsigned, the value is T. */ tree (*unsigned_type) PARAMS ((tree)); /* Given an integer type T, return a type like T but signed. If T is signed, the value is T. */ tree (*signed_type) PARAMS ((tree)); /* Return a type the same as TYPE except unsigned or signed according to UNSIGNEDP. */ tree (*signed_or_unsigned_type) PARAMS ((int, tree)); /* Given a type, apply default promotions to unnamed function arguments and return the new type. Return the same type if no change. Required by any language that supports variadic arguments. The default hook aborts. */ tree (*type_promotes_to) PARAMS ((tree)); /* This routine is called in tree.c to print an error message for invalid use of an incomplete type. VALUE is the expression that was used (or 0 if that isn't known) and TYPE is the type that was invalid. */ void (*incomplete_type_error) PARAMS ((tree value, tree type)); }; /* Language hooks related to decls and the symbol table. */ struct lang_hooks_for_decls { /* Enter a new lexical scope. Argument is always zero when called from outside the front end. */ void (*pushlevel) PARAMS ((int)); /* Exit a lexical scope and return a BINDING for that scope. Takes three arguments: KEEP -- nonzero if there were declarations in this scope. REVERSE -- reverse the order of decls before returning them. FUNCTIONBODY -- nonzero if this level is the body of a function. */ tree (*poplevel) PARAMS ((int, int, int)); /* Returns nonzero if we are in the global binding level. Ada returns -1 for an undocumented reason used in stor-layout.c. */ int (*global_bindings_p) PARAMS ((void)); /* Insert BLOCK at the end of the list of subblocks of the current binding level. This is used when a BIND_EXPR is expanded, to handle the BLOCK node inside the BIND_EXPR. */ void (*insert_block) PARAMS ((tree)); /* Set the BLOCK node for the current scope level. */ void (*set_block) PARAMS ((tree)); /* Function to add a decl to the current scope level. Takes one argument, a decl to add. Returns that decl, or, if the same symbol is already declared, may return a different decl for that name. */ tree (*pushdecl) PARAMS ((tree)); /* Returns the chain of decls so far in the current scope level. */ tree (*getdecls) PARAMS ((void)); /* Returns true when we should warn for an unused global DECL. We will already have checked that it has static binding. */ bool (*warn_unused_global) PARAMS ((tree)); /* Obtain a list of globals and do final output on them at end of compilation */ void (*final_write_globals) PARAMS ((void)); }; /* Language-specific hooks. See langhooks-def.h for defaults. */ struct lang_hooks { /* String identifying the front end. e.g. "GNU C++". */ const char *name; /* sizeof (struct lang_identifier), so make_node () creates identifier nodes long enough for the language-specific slots. */ size_t identifier_size; /* The first callback made to the front end, for simple initialization needed before any calls to decode_option. */ void (*init_options) PARAMS ((void)); /* Function called with an option vector as argument, to decode a single option (typically starting with -f or -W or +). It should return the number of command-line arguments it uses if it handles the option, or 0 and not complain if it does not recognize the option. If this function returns a negative number, then its absolute value is the number of command-line arguments used, but, in addition, no language-independent option processing should be done for this option. */ int (*decode_option) PARAMS ((int, char **)); /* Called when all command line options have been parsed. Should do any required consistency checks, modifications etc. Complex initialization should be left to the "init" callback, since GC and the identifier hashes are set up between now and then. Should return zero unless the compiler back-end does not need to be initialized, such as with the -E option. If errorcount is nonzero after this call the compiler exits immediately and the finish hook is not called. */ bool (*post_options) PARAMS ((void)); /* Called after post_options, to initialize the front end. The main input filename is passed, which may be NULL; the front end should return the original filename (e.g. foo.i -> foo.c). Return NULL to indicate a serious error of some sort; in that case no compilation is performed, and the finish hook is called immediately. */ const char * (*init) PARAMS ((const char *)); /* Called at the end of compilation, as a finalizer. */ void (*finish) PARAMS ((void)); /* APPLE LOCAL Objective-C++ */ /* Called at the end of the translation unit. */ void (*finish_file) PARAMS ((void)); /* Parses the entire file. The argument is nonzero to cause bison parsers to dump debugging information during parsing. */ void (*parse_file) PARAMS ((int)); /* Called immediately after parsing to clear the binding stack. */ void (*clear_binding_stack) PARAMS ((void)); /* Called to obtain the alias set to be used for an expression or type. Returns -1 if the language does nothing special for it. */ HOST_WIDE_INT (*get_alias_set) PARAMS ((tree)); /* Called with an expression that is to be processed as a constant. Returns either the same expression or a language-independent constant equivalent to its input. */ tree (*expand_constant) PARAMS ((tree)); /* Called by expand_expr for language-specific tree codes. Fourth argument is actually an enum expand_modifier. */ rtx (*expand_expr) PARAMS ((tree, rtx, enum machine_mode, int)); /* Prepare expr to be an argument of a TRUTH_NOT_EXPR or other logical operation. This preparation consists of taking the ordinary representation of an expression expr and producing a valid tree boolean expression describing whether expr is nonzero. We could simply always do build_binary_op (NE_EXPR, expr, integer_zero_node, 1), but we optimize comparisons, &&, ||, and !. The result should be an expression of boolean type (if not an error_mark_node). */ tree (*truthvalue_conversion) PARAMS ((tree)); /* Possibly apply default attributes to a function (represented by a FUNCTION_DECL). */ void (*insert_default_attributes) PARAMS ((tree)); /* Hook called by safe_from_p for language-specific tree codes. It is up to the language front-end to install a hook if it has any such codes that safe_from_p needs to know about. Since same_from_p will recursively explore the TREE_OPERANDs of an expression, this hook should not reexamine those pieces. This routine may recursively call safe_from_p; it should always pass `0' as the TOP_P parameter. */ int (*safe_from_p) PARAMS ((rtx, tree)); /* Function to finish handling an incomplete decl at the end of compilation. Default hook is does nothing. */ void (*finish_incomplete_decl) PARAMS ((tree)); /* Function used by unsafe_for_reeval. A non-negative number is returned directly from unsafe_for_reeval, a negative number falls through. The default hook returns a negative number. */ int (*unsafe_for_reeval) PARAMS ((tree)); /* Mark EXP saying that we need to be able to take the address of it; it should not be allocated in a register. Return true if successful. */ bool (*mark_addressable) PARAMS ((tree)); /* Hook called by staticp for language-specific tree codes. */ int (*staticp) PARAMS ((tree)); /* Replace the DECL_LANG_SPECIFIC data, which may be NULL, of the DECL_NODE with a newly GC-allocated copy. */ void (*dup_lang_specific_decl) PARAMS ((tree)); /* Called before its argument, an UNSAVE_EXPR, is to be unsaved. Modify it in-place so that all the evaluate only once things are cleared out. */ tree (*unsave_expr_now) PARAMS ((tree)); /* Called by expand_expr to build and return the cleanup-expression for the passed TARGET_EXPR. Return NULL if there is none. */ tree (*maybe_build_cleanup) PARAMS ((tree)); /* Set the DECL_ASSEMBLER_NAME for a node. If it is the sort of thing that the assembler should talk about, set DECL_ASSEMBLER_NAME to an appropriate IDENTIFIER_NODE. Otherwise, set it to the ERROR_MARK_NODE to ensure that the assembler does not talk about it. */ void (*set_decl_assembler_name) PARAMS ((tree)); /* Return nonzero if fold-const is free to use bit-field optimizations, for instance in fold_truthop(). */ bool (*can_use_bit_fields_p) PARAMS ((void)); /* Nonzero if TYPE_READONLY and TREE_READONLY should always be honored. */ bool honor_readonly; /* The front end can add its own statistics to -fmem-report with this hook. It should output to stderr. */ void (*print_statistics) PARAMS ((void)); /* Called by print_tree when there is a tree of class 'x' that it doesn't know how to display. */ lang_print_tree_hook print_xnode; /* Called to print language-dependent parts of a class 'd', class 't', and IDENTIFIER_NODE nodes. */ lang_print_tree_hook print_decl; lang_print_tree_hook print_type; lang_print_tree_hook print_identifier; /* Computes the name to use to print a declaration. DECL is the non-NULL declaration in question. VERBOSITY determines what information will be printed: 0: DECL_NAME, demangled as necessary. 1: and scope information. 2: and any other information that might be interesting, such as function parameter types in C++. */ const char *(*decl_printable_name) PARAMS ((tree decl, int verbosity)); /* Called by report_error_function to print out function name. */ void (*print_error_function) PARAMS ((struct diagnostic_context *, const char *)); /* Called from expr_size to calculate the size of the value of an expression in a language-dependent way. Returns a tree for the size in bytes. A frontend can call lhd_expr_size to get the default semantics in cases that it doesn't want to handle specially. */ tree (*expr_size) PARAMS ((tree)); /* Pointers to machine-independent attribute tables, for front ends using attribs.c. If one is NULL, it is ignored. Respectively, a table of attributes specific to the language, a table of attributes common to two or more languages (to allow easy sharing), and a table of attributes for checking formats. */ const struct attribute_spec *attribute_table; const struct attribute_spec *common_attribute_table; const struct attribute_spec *format_attribute_table; /* APPLE LOCAL new tree dump */ /* Called to tree dump language-dependent parts of a class 'd', class 't', IDENTIFIER_NODE nodes, conditional blank lines before statements, and statment line numbers. See dmp-tree.c for documentation. */ void (*dump_decl) PARAMS ((FILE *, tree, int, int)); void (*dump_type) PARAMS ((FILE *, tree, int, int)); void (*dump_identifier) PARAMS ((FILE *, tree, int, int)); int (*dump_blank_line_p) PARAMS ((tree, tree)); int (*dump_lineno_p) PARAMS ((FILE *, tree)); int (*dmp_tree3) PARAMS ((FILE *, tree, int)); /* Function-related language hooks. */ struct lang_hooks_for_functions function; struct lang_hooks_for_tree_inlining tree_inlining; struct lang_hooks_for_tree_dump tree_dump; struct lang_hooks_for_decls decls; struct lang_hooks_for_types types; /* Whenever you add entries here, make sure you adjust langhooks-def.h and langhooks.c accordingly. */ }; /* Each front end provides its own. */ extern const struct lang_hooks lang_hooks; #endif /* GCC_LANG_HOOKS_H */