1 /* Code to maintain a C++ template repository.
2 Copyright (C) 1995 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
35 extern char * rindex ();
36 extern char * getenv ();
37 extern char * getpwd ();
39 static tree pending_repo;
40 static tree original_repo;
41 static char *repo_name;
42 static FILE *repo_file;
44 extern int flag_use_repository;
45 extern int errorcount, sorrycount;
46 extern struct obstack temporary_obstack;
47 extern struct obstack permanent_obstack;
49 #define IDENTIFIER_REPO_USED(NODE) (TREE_LANG_FLAG_3 (NODE))
50 #define IDENTIFIER_REPO_CHOSEN(NODE) (TREE_LANG_FLAG_4 (NODE))
53 /* Record the flags used to compile this translation unit. */
56 repo_compile_flags (argc, argv)
62 /* If this template has not been seen before, add a note to the repository
63 saying where the declaration was. This may be used to find the
64 definition at link time. */
67 repo_template_declared (t)
71 /* Note where the definition of a template lives so that instantiations can
72 be generated later. */
75 repo_template_defined (t)
79 /* Note where the definition of a class lives to that template
80 instantiations can use it. */
83 repo_class_defined (t)
92 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
94 t = TYPE_BINFO_VTABLE (t);
98 return DECL_ASSEMBLER_NAME (t);
101 /* Note that a template has been used. If we can see the definition, offer
105 repo_template_used (t)
110 if (! flag_use_repository)
113 id = repo_get_id (t);
117 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
119 if (IDENTIFIER_REPO_CHOSEN (id))
120 mark_class_instantiated (t, 0);
122 else if (TREE_CODE_CLASS (TREE_CODE (t)) == 'd')
124 if (IDENTIFIER_REPO_CHOSEN (id))
125 mark_decl_instantiated (t, 0);
128 my_friendly_abort (1);
130 if (! IDENTIFIER_REPO_USED (id))
132 IDENTIFIER_REPO_USED (id) = 1;
133 pending_repo = perm_tree_cons (NULL_TREE, id, pending_repo);
138 /* Note that the vtable for a class has been used, and offer to emit it. */
144 if (! flag_use_repository)
147 pending_repo = perm_tree_cons (NULL_TREE, t, pending_repo);
150 /* Note that an inline with external linkage has been used, and offer to
154 repo_inline_used (fn)
157 if (! flag_use_repository)
160 /* Member functions of polymorphic classes go with their vtables. */
161 if (DECL_FUNCTION_MEMBER_P (fn) && TYPE_VIRTUAL_P (DECL_CLASS_CONTEXT (fn)))
163 repo_vtable_used (DECL_CLASS_CONTEXT (fn));
167 pending_repo = perm_tree_cons (NULL_TREE, fn, pending_repo);
170 /* Note that a particular typeinfo node has been used, and offer to
181 repo_template_instantiated (t, extern_p)
187 tree id = repo_get_id (t);
189 IDENTIFIER_REPO_CHOSEN (id) = 1;
198 return obstack_copy0 (&temporary_obstack, s, len);
202 get_base_filename (filename)
205 char *p = getenv ("COLLECT_GCC_OPTIONS");
213 while (*q && *q != ' ') q++;
214 if (*p == '-' && p[1] == 'o')
221 while (*q && *q != ' ') q++;
224 output = save_string (p, q - p);
226 else if (*p == '-' && p[1] == 'c')
232 if (compiling && output)
235 if (p && ! compiling)
237 warning ("-frepo must be used with -c");
238 flag_use_repository = 0;
242 p = rindex (filename, '/');
250 open_repo_file (filename)
254 char *s = get_base_filename (filename);
266 obstack_grow (&permanent_obstack, s, p - s);
267 repo_name = obstack_copy0 (&permanent_obstack, ".rpo", 4);
269 repo_file = fopen (repo_name, "r");
277 while ((c = getc (stream)) != EOF && c != '\n')
278 obstack_1grow (&temporary_obstack, c);
279 if (obstack_object_size (&temporary_obstack) == 0)
281 obstack_1grow (&temporary_obstack, '\0');
282 return obstack_finish (&temporary_obstack);
291 if (! flag_use_repository)
294 open_repo_file (filename);
299 while (buf = afgets (repo_file))
310 tree id = get_identifier (buf + 2);
315 IDENTIFIER_REPO_CHOSEN (id) = 1;
316 orig = integer_one_node;
321 original_repo = perm_tree_cons (orig, id, original_repo);
325 error ("mysterious repository information in %s", repo_name);
327 obstack_free (&temporary_obstack, buf);
332 reopen_repo_file_for_write ()
336 repo_file = fopen (repo_name, "w");
340 error ("can't create repository information file `%s'", repo_name);
341 flag_use_repository = 0;
345 /* Emit any pending repos. */
352 int repo_changed = 0;
354 if (! flag_use_repository)
357 /* Do we have to write out a new info file? */
359 /* Are there any old templates that aren't used any longer or that are
362 for (t = original_repo; t; t = TREE_CHAIN (t))
364 if (! IDENTIFIER_REPO_USED (TREE_VALUE (t))
365 || (! TREE_PURPOSE (t) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t))))
370 IDENTIFIER_REPO_USED (TREE_VALUE (t)) = 0;
373 /* Are there any templates that are newly used? */
376 for (t = pending_repo; t; t = TREE_CHAIN (t))
378 if (IDENTIFIER_REPO_USED (TREE_VALUE (t)))
385 if (! repo_changed || errorcount || sorrycount)
388 reopen_repo_file_for_write ();
393 fprintf (repo_file, "M %s\n", main_input_filename);
396 fprintf (repo_file, "D %s\n", p);
398 p = getenv ("COLLECT_GCC_OPTIONS");
400 fprintf (repo_file, "A %s\n", p);
402 for (t = pending_repo; t; t = TREE_CHAIN (t))
404 tree val = TREE_VALUE (t);
405 char type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
407 fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));