177 lines
6.9 KiB
C
177 lines
6.9 KiB
C
/* The lang_hooks data structure.
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Copyright 2001 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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/* 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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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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/* 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 non-zero 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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/* 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 recognise 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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If errorcount is non-zero after this call the compiler exits
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immediately and the finish hook is not called. */
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void (*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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/* 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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/* 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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/* Hook called by staticp for language-specific tree codes. */
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int (*staticp) PARAMS ((tree));
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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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/* Set yydebug for bison-based parsers, when -dy is given on the
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command line. By default, if the parameter is non-zero, prints a
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warning that the front end does not use such a parser. */
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void (*set_yydebug) PARAMS ((int));
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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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struct lang_hooks_for_tree_inlining tree_inlining;
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struct lang_hooks_for_tree_dump tree_dump;
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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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