1 /* The lang_hooks data structure.
2 Copyright 2001 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #ifndef GCC_LANG_HOOKS_H
22 #define GCC_LANG_HOOKS_H
24 /* A print hook for print_tree (). */
25 typedef void (*lang_print_tree_hook) PARAMS ((FILE *, tree, int indent));
27 /* The following hooks are documented in langhooks.c. Must not be
30 struct lang_hooks_for_tree_inlining
32 union tree_node *(*walk_subtrees) PARAMS ((union tree_node **, int *,
37 int (*cannot_inline_tree_fn) PARAMS ((union tree_node **));
38 int (*disregard_inline_limits) PARAMS ((union tree_node *));
39 union tree_node *(*add_pending_fn_decls) PARAMS ((void *,
41 int (*tree_chain_matters_p) PARAMS ((union tree_node *));
42 int (*auto_var_in_fn_p) PARAMS ((union tree_node *, union tree_node *));
43 union tree_node *(*copy_res_decl_for_inlining) PARAMS ((union tree_node *,
48 int (*anon_aggr_type_p) PARAMS ((union tree_node *));
51 /* Language-specific hooks. See langhooks-def.h for defaults. */
55 /* String identifying the front end. e.g. "GNU C++". */
58 /* sizeof (struct lang_identifier), so make_node () creates
59 identifier nodes long enough for the language-specific slots. */
60 size_t identifier_size;
62 /* Called first, to initialize the front end. */
63 void (*init) PARAMS ((void));
65 /* Called last, as a finalizer. */
66 void (*finish) PARAMS ((void));
68 /* Called immediately after parsing to clear the binding stack. */
69 void (*clear_binding_stack) PARAMS ((void));
71 /* Called to initialize options, before any calls to decode_option. */
72 void (*init_options) PARAMS ((void));
74 /* Function called with an option vector as argument, to decode a
75 single option (typically starting with -f or -W or +). It should
76 return the number of command-line arguments it uses if it handles
77 the option, or 0 and not complain if it does not recognise the
78 option. If this function returns a negative number, then its
79 absolute value is the number of command-line arguments used, but,
80 in addition, no language-independent option processing should be
81 done for this option. */
82 int (*decode_option) PARAMS ((int, char **));
84 /* Called when all command line options have been processed. */
85 void (*post_options) PARAMS ((void));
87 /* Called to obtain the alias set to be used for an expression or type.
88 Returns -1 if the language does nothing special for it. */
89 HOST_WIDE_INT (*get_alias_set) PARAMS ((tree));
91 /* Nonzero if TYPE_READONLY and TREE_READONLY should always be honored. */
94 /* The front end can add its own statistics to -fmem-report with
95 this hook. It should output to stderr. */
96 void (*print_statistics) PARAMS ((void));
98 /* Called by print_tree when there is a tree of class 'x' that it
99 doesn't know how to display. */
100 lang_print_tree_hook print_xnode;
102 /* Called to print language-dependent parts of a class 'd', class
103 't', and IDENTIFIER_NODE nodes. */
104 lang_print_tree_hook print_decl;
105 lang_print_tree_hook print_type;
106 lang_print_tree_hook print_identifier;
108 /* Set yydebug for bison-based parsers, when -dy is given on the
109 command line. By default, if the parameter is non-zero, prints a
110 warning that the front end does not use such a parser. */
111 void (*set_yydebug) PARAMS ((int));
113 struct lang_hooks_for_tree_inlining tree_inlining;
115 /* Whenever you add entries here, make sure you adjust langhooks.h
116 and langhooks.c accordingly. */
119 /* Each front end provides its own. */
120 extern const struct lang_hooks lang_hooks;
122 #endif /* GCC_LANG_HOOKS_H */