1 /* Code to maintain a C++ template repository.
2 Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Jason Merrill (jason@cygnus.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* My strategy here is as follows:
24 Everything should be emitted in a translation unit where it is used.
25 The results of the automatic process should be easily reproducible with
37 static tree repo_get_id
PARAMS ((tree
));
38 static char *extract_string
PARAMS ((char **));
39 static char *get_base_filename
PARAMS ((const char *));
40 static void open_repo_file
PARAMS ((const char *));
41 static char *afgets
PARAMS ((FILE *));
42 static void reopen_repo_file_for_write
PARAMS ((void));
44 static tree pending_repo
;
45 static tree original_repo
;
46 static char *repo_name
;
47 static FILE *repo_file
;
49 static char *old_args
, *old_dir
, *old_main
;
51 extern int flag_use_repository
;
52 extern struct obstack temporary_obstack
;
53 extern struct obstack permanent_obstack
;
55 #define IDENTIFIER_REPO_USED(NODE) (TREE_LANG_FLAG_3 (NODE))
56 #define IDENTIFIER_REPO_CHOSEN(NODE) (TREE_LANG_FLAG_4 (NODE))
59 /* Record the flags used to compile this translation unit. */
62 repo_compile_flags (argc
, argv
)
68 /* If this template has not been seen before, add a note to the repository
69 saying where the declaration was. This may be used to find the
70 definition at link time. */
73 repo_template_declared (t
)
77 /* Note where the definition of a template lives so that instantiations can
78 be generated later. */
81 repo_template_defined (t
)
85 /* Note where the definition of a class lives to that template
86 instantiations can use it. */
89 repo_class_defined (t
)
98 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
100 /* If we're not done setting up the class, we may not have set up
101 the vtable, so going ahead would give the wrong answer.
102 See g++.pt/instantiate4.C. */
103 if (TYPE_SIZE (t
) == NULL_TREE
|| TYPE_BEING_DEFINED (t
))
104 my_friendly_abort (981113);
106 t
= TYPE_BINFO_VTABLE (t
);
110 return DECL_ASSEMBLER_NAME (t
);
113 /* Note that a template has been used. If we can see the definition, offer
117 repo_template_used (t
)
122 if (! flag_use_repository
)
125 id
= repo_get_id (t
);
129 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
131 if (IDENTIFIER_REPO_CHOSEN (id
))
132 mark_class_instantiated (t
, 0);
134 else if (TREE_CODE_CLASS (TREE_CODE (t
)) == 'd')
136 if (IDENTIFIER_REPO_CHOSEN (id
))
137 mark_decl_instantiated (t
, 0);
140 my_friendly_abort (1);
142 if (! IDENTIFIER_REPO_USED (id
))
144 IDENTIFIER_REPO_USED (id
) = 1;
145 pending_repo
= tree_cons (NULL_TREE
, id
, pending_repo
);
150 /* Note that the vtable for a class has been used, and offer to emit it. */
156 if (! flag_use_repository
)
159 pending_repo
= tree_cons (NULL_TREE
, t
, pending_repo
);
162 /* Note that an inline with external linkage has been used, and offer to
166 repo_inline_used (fn
)
169 if (! flag_use_repository
)
172 /* Member functions of polymorphic classes go with their vtables. */
173 if (DECL_FUNCTION_MEMBER_P (fn
)
174 && TYPE_POLYMORPHIC_P (DECL_CONTEXT (fn
)))
176 repo_vtable_used (DECL_CONTEXT (fn
));
180 pending_repo
= tree_cons (NULL_TREE
, fn
, pending_repo
);
183 /* Note that a particular typeinfo node has been used, and offer to
194 repo_template_instantiated (t
, extern_p
)
200 tree id
= repo_get_id (t
);
202 IDENTIFIER_REPO_CHOSEN (id
) = 1;
206 /* Parse a reasonable subset of shell quoting syntax. */
223 obstack_1grow (&temporary_obstack
, c
);
224 else if (! inside
&& c
== ' ')
226 else if (! inside
&& c
== '\\')
231 obstack_1grow (&temporary_obstack
, c
);
234 obstack_1grow (&temporary_obstack
, '\0');
236 return obstack_finish (&temporary_obstack
);
240 get_base_filename (filename
)
241 const char *filename
;
243 char *p
= getenv ("COLLECT_GCC_OPTIONS");
249 char *q
= extract_string (&p
);
251 if (strcmp (q
, "-o") == 0)
252 output
= extract_string (&p
);
253 else if (strcmp (q
, "-c") == 0)
257 if (compiling
&& output
)
260 if (p
&& ! compiling
)
262 warning ("-frepo must be used with -c");
263 flag_use_repository
= 0;
267 return file_name_nondirectory (filename
);
271 open_repo_file (filename
)
272 const char *filename
;
274 register const char *p
;
275 const char *s
= get_base_filename (filename
);
280 p
= file_name_nondirectory (s
);
285 obstack_grow (&permanent_obstack
, s
, p
- s
);
286 repo_name
= obstack_copy0 (&permanent_obstack
, ".rpo", 4);
288 repo_file
= fopen (repo_name
, "r");
296 while ((c
= getc (stream
)) != EOF
&& c
!= '\n')
297 obstack_1grow (&temporary_obstack
, c
);
298 if (obstack_object_size (&temporary_obstack
) == 0)
300 obstack_1grow (&temporary_obstack
, '\0');
301 return obstack_finish (&temporary_obstack
);
306 const char *filename
;
310 if (! flag_use_repository
)
313 ggc_add_tree_root (&pending_repo
, 1);
314 ggc_add_tree_root (&original_repo
, 1);
316 open_repo_file (filename
);
321 while ((buf
= afgets (repo_file
)))
326 old_args
= obstack_copy0 (&permanent_obstack
, buf
+ 2,
330 old_dir
= obstack_copy0 (&permanent_obstack
, buf
+ 2,
334 old_main
= obstack_copy0 (&permanent_obstack
, buf
+ 2,
340 tree id
= get_identifier (buf
+ 2);
345 IDENTIFIER_REPO_CHOSEN (id
) = 1;
346 orig
= integer_one_node
;
351 original_repo
= tree_cons (orig
, id
, original_repo
);
355 error ("mysterious repository information in %s", repo_name
);
357 obstack_free (&temporary_obstack
, buf
);
362 reopen_repo_file_for_write ()
366 repo_file
= fopen (repo_name
, "w");
370 error ("can't create repository information file `%s'", repo_name
);
371 flag_use_repository
= 0;
375 /* Emit any pending repos. */
381 int repo_changed
= 0;
384 if (! flag_use_repository
)
387 /* Do we have to write out a new info file? */
389 /* Are there any old templates that aren't used any longer or that are
392 for (t
= original_repo
; t
; t
= TREE_CHAIN (t
))
394 if (! IDENTIFIER_REPO_USED (TREE_VALUE (t
))
395 || (! TREE_PURPOSE (t
) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t
))))
400 IDENTIFIER_REPO_USED (TREE_VALUE (t
)) = 0;
403 /* Are there any templates that are newly used? */
406 for (t
= pending_repo
; t
; t
= TREE_CHAIN (t
))
408 if (IDENTIFIER_REPO_USED (TREE_VALUE (t
)))
416 args
= getenv ("COLLECT_GCC_OPTIONS");
418 if (! repo_changed
&& pending_repo
)
419 if (strcmp (old_main
, main_input_filename
) != 0
420 || strcmp (old_dir
, dir
) != 0
421 || (args
== NULL
) != (old_args
== NULL
)
422 || (args
&& strcmp (old_args
, args
) != 0))
425 if (! repo_changed
|| errorcount
|| sorrycount
)
428 reopen_repo_file_for_write ();
433 fprintf (repo_file
, "M %s\n", main_input_filename
);
434 fprintf (repo_file
, "D %s\n", dir
);
436 fprintf (repo_file
, "A %s\n", args
);
438 for (t
= pending_repo
; t
; t
= TREE_CHAIN (t
))
440 tree val
= TREE_VALUE (t
);
441 char type
= IDENTIFIER_REPO_CHOSEN (val
) ? 'C' : 'O';
443 fprintf (repo_file
, "%c %s\n", type
, IDENTIFIER_POINTER (val
));