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/* The lang_hooks data structure.
Copyright 2001 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
/* 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 *));
int (*start_inlining) PARAMS ((union tree_node *));
void (*end_inlining) PARAMS ((union tree_node *));
};
/* The following hooks are used by tree-dump.c. */
struct lang_hooks_for_tree_dump
{
/* Dump language-specific parts of tree nodes. Returns non-zero 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));
};
/* 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 recognise 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. */
void (*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));
/* Parses the entire file. */
void (*parse_file) PARAMS ((void));
/* 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));
/* 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));
/* 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));
/* 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;
/* Set yydebug for bison-based parsers, when -dy is given on the
command line. By default, if the parameter is non-zero, prints a
warning that the front end does not use such a parser. */
void (*set_yydebug) PARAMS ((int));
struct lang_hooks_for_tree_inlining tree_inlining;
struct lang_hooks_for_tree_dump tree_dump;
/* 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 */
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