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