1 /* Code to maintain a C++ template repository.
2 Copyright (C) 1995, 96-97, 1998 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
36 extern char *getpwd PROTO((void));
38 static tree repo_get_id PROTO((tree));
39 static char *extract_string PROTO((char **));
40 static char *get_base_filename PROTO((const char *));
41 static void open_repo_file PROTO((const char *));
42 static char *afgets PROTO((FILE *));
43 static void reopen_repo_file_for_write PROTO((void));
45 static tree pending_repo;
46 static tree original_repo;
47 static char *repo_name;
48 static FILE *repo_file;
50 static char *old_args, *old_dir, *old_main;
52 extern int flag_use_repository;
53 extern struct obstack temporary_obstack;
54 extern struct obstack permanent_obstack;
56 #define IDENTIFIER_REPO_USED(NODE) (TREE_LANG_FLAG_3 (NODE))
57 #define IDENTIFIER_REPO_CHOSEN(NODE) (TREE_LANG_FLAG_4 (NODE))
60 /* Record the flags used to compile this translation unit. */
63 repo_compile_flags (argc, argv)
69 /* If this template has not been seen before, add a note to the repository
70 saying where the declaration was. This may be used to find the
71 definition at link time. */
74 repo_template_declared (t)
78 /* Note where the definition of a template lives so that instantiations can
79 be generated later. */
82 repo_template_defined (t)
86 /* Note where the definition of a class lives to that template
87 instantiations can use it. */
90 repo_class_defined (t)
99 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
101 /* If we're not done setting up the class, we may not have set up
102 the vtable, so going ahead would give the wrong answer.
103 See g++.pt/instantiate4.C. */
104 if (TYPE_SIZE (t) == NULL_TREE || TYPE_BEING_DEFINED (t))
105 my_friendly_abort (981113);
107 t = TYPE_BINFO_VTABLE (t);
111 return DECL_ASSEMBLER_NAME (t);
114 /* Note that a template has been used. If we can see the definition, offer
118 repo_template_used (t)
123 if (! flag_use_repository)
126 id = repo_get_id (t);
130 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
132 if (IDENTIFIER_REPO_CHOSEN (id))
133 mark_class_instantiated (t, 0);
135 else if (TREE_CODE_CLASS (TREE_CODE (t)) == 'd')
137 if (IDENTIFIER_REPO_CHOSEN (id))
138 mark_decl_instantiated (t, 0);
141 my_friendly_abort (1);
143 if (! IDENTIFIER_REPO_USED (id))
145 IDENTIFIER_REPO_USED (id) = 1;
146 pending_repo = perm_tree_cons (NULL_TREE, id, pending_repo);
151 /* Note that the vtable for a class has been used, and offer to emit it. */
157 if (! flag_use_repository)
160 pending_repo = perm_tree_cons (NULL_TREE, t, pending_repo);
163 /* Note that an inline with external linkage has been used, and offer to
167 repo_inline_used (fn)
170 if (! flag_use_repository)
173 /* Member functions of polymorphic classes go with their vtables. */
174 if (DECL_FUNCTION_MEMBER_P (fn) && TYPE_VIRTUAL_P (DECL_CLASS_CONTEXT (fn)))
176 repo_vtable_used (DECL_CLASS_CONTEXT (fn));
180 pending_repo = perm_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 open_repo_file (filename);
318 while ((buf = afgets (repo_file)))
323 old_args = obstack_copy0 (&permanent_obstack, buf + 2,
327 old_dir = obstack_copy0 (&permanent_obstack, buf + 2,
331 old_main = obstack_copy0 (&permanent_obstack, buf + 2,
337 tree id = get_identifier (buf + 2);
342 IDENTIFIER_REPO_CHOSEN (id) = 1;
343 orig = integer_one_node;
348 original_repo = perm_tree_cons (orig, id, original_repo);
352 error ("mysterious repository information in %s", repo_name);
354 obstack_free (&temporary_obstack, buf);
359 reopen_repo_file_for_write ()
363 repo_file = fopen (repo_name, "w");
367 error ("can't create repository information file `%s'", repo_name);
368 flag_use_repository = 0;
372 /* Emit any pending repos. */
378 int repo_changed = 0;
381 if (! flag_use_repository)
384 /* Do we have to write out a new info file? */
386 /* Are there any old templates that aren't used any longer or that are
389 for (t = original_repo; t; t = TREE_CHAIN (t))
391 if (! IDENTIFIER_REPO_USED (TREE_VALUE (t))
392 || (! TREE_PURPOSE (t) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t))))
397 IDENTIFIER_REPO_USED (TREE_VALUE (t)) = 0;
400 /* Are there any templates that are newly used? */
403 for (t = pending_repo; t; t = TREE_CHAIN (t))
405 if (IDENTIFIER_REPO_USED (TREE_VALUE (t)))
413 args = getenv ("COLLECT_GCC_OPTIONS");
415 if (! repo_changed && pending_repo)
416 if (strcmp (old_main, main_input_filename) != 0
417 || strcmp (old_dir, dir) != 0
418 || (args == NULL) != (old_args == NULL)
419 || (args && strcmp (old_args, args) != 0))
422 if (! repo_changed || errorcount || sorrycount)
425 reopen_repo_file_for_write ();
430 fprintf (repo_file, "M %s\n", main_input_filename);
431 fprintf (repo_file, "D %s\n", dir);
433 fprintf (repo_file, "A %s\n", args);
435 for (t = pending_repo; t; t = TREE_CHAIN (t))
437 tree val = TREE_VALUE (t);
438 char type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
440 fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));