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)
102 /* If we're not done setting up the class, we may not have set up
103 the vtable, so going ahead would give the wrong answer.
104 See g++.pt/instantiate4.C. */
105 if (!COMPLETE_TYPE_P (t) || TYPE_BEING_DEFINED (t))
106 my_friendly_abort (981113);
108 vtable = get_vtbl_decl_for_binfo (TYPE_BINFO (t));
110 /* If we don't have a primary vtable, try looking for a secondary
112 if (vtable == NULL_TREE && !flag_new_abi
113 && TYPE_USES_VIRTUAL_BASECLASSES (t))
115 tree binfos = BINFO_BASETYPES (TYPE_BINFO (t));
116 int i, n_baselinks = binfos ? TREE_VEC_LENGTH (binfos) : 0;
117 for (i = 0; i < n_baselinks; ++i)
119 tree base_binfo = TREE_VEC_ELT (binfos, i);
120 if (TREE_VIA_VIRTUAL (base_binfo))
122 vtable = get_vtbl_decl_for_binfo (base_binfo);
133 return DECL_ASSEMBLER_NAME (t);
136 /* Note that a template has been used. If we can see the definition, offer
140 repo_template_used (t)
145 if (! flag_use_repository)
148 id = repo_get_id (t);
154 if (IDENTIFIER_REPO_CHOSEN (id))
155 mark_class_instantiated (t, 0);
159 if (IDENTIFIER_REPO_CHOSEN (id))
160 mark_decl_instantiated (t, 0);
163 my_friendly_abort (1);
165 if (! IDENTIFIER_REPO_USED (id))
167 IDENTIFIER_REPO_USED (id) = 1;
168 pending_repo = tree_cons (NULL_TREE, id, pending_repo);
173 /* Note that the vtable for a class has been used, and offer to emit it. */
179 if (! flag_use_repository)
182 pending_repo = tree_cons (NULL_TREE, t, pending_repo);
185 /* Note that an inline with external linkage has been used, and offer to
189 repo_inline_used (fn)
192 if (! flag_use_repository)
195 /* Member functions of polymorphic classes go with their vtables. */
196 if (DECL_FUNCTION_MEMBER_P (fn)
197 && TYPE_POLYMORPHIC_P (DECL_CONTEXT (fn)))
199 repo_vtable_used (DECL_CONTEXT (fn));
203 pending_repo = tree_cons (NULL_TREE, fn, pending_repo);
206 /* Note that a particular typeinfo node has been used, and offer to
217 repo_template_instantiated (t, extern_p)
223 tree id = repo_get_id (t);
225 IDENTIFIER_REPO_CHOSEN (id) = 1;
229 /* Parse a reasonable subset of shell quoting syntax. */
246 obstack_1grow (&temporary_obstack, c);
247 else if (! inside && c == ' ')
249 else if (! inside && c == '\\')
254 obstack_1grow (&temporary_obstack, c);
257 obstack_1grow (&temporary_obstack, '\0');
259 return obstack_finish (&temporary_obstack);
263 get_base_filename (filename)
264 const char *filename;
266 char *p = getenv ("COLLECT_GCC_OPTIONS");
272 char *q = extract_string (&p);
274 if (strcmp (q, "-o") == 0)
275 output = extract_string (&p);
276 else if (strcmp (q, "-c") == 0)
280 if (compiling && output)
283 if (p && ! compiling)
285 warning ("-frepo must be used with -c");
286 flag_use_repository = 0;
290 return file_name_nondirectory (filename);
294 open_repo_file (filename)
295 const char *filename;
297 register const char *p;
298 const char *s = get_base_filename (filename);
303 p = file_name_nondirectory (s);
308 obstack_grow (&permanent_obstack, s, p - s);
309 repo_name = obstack_copy0 (&permanent_obstack, ".rpo", 4);
311 repo_file = fopen (repo_name, "r");
319 while ((c = getc (stream)) != EOF && c != '\n')
320 obstack_1grow (&temporary_obstack, c);
321 if (obstack_object_size (&temporary_obstack) == 0)
323 obstack_1grow (&temporary_obstack, '\0');
324 return obstack_finish (&temporary_obstack);
329 const char *filename;
333 if (! flag_use_repository)
336 ggc_add_tree_root (&pending_repo, 1);
337 ggc_add_tree_root (&original_repo, 1);
339 open_repo_file (filename);
344 while ((buf = afgets (repo_file)))
349 old_args = obstack_copy0 (&permanent_obstack, buf + 2,
353 old_dir = obstack_copy0 (&permanent_obstack, buf + 2,
357 old_main = obstack_copy0 (&permanent_obstack, buf + 2,
363 tree id = get_identifier (buf + 2);
368 IDENTIFIER_REPO_CHOSEN (id) = 1;
369 orig = integer_one_node;
374 original_repo = tree_cons (orig, id, original_repo);
378 error ("mysterious repository information in %s", repo_name);
380 obstack_free (&temporary_obstack, buf);
385 reopen_repo_file_for_write ()
389 repo_file = fopen (repo_name, "w");
393 error ("can't create repository information file `%s'", repo_name);
394 flag_use_repository = 0;
398 /* Emit any pending repos. */
404 int repo_changed = 0;
407 if (! flag_use_repository)
410 /* Do we have to write out a new info file? */
412 /* Are there any old templates that aren't used any longer or that are
415 for (t = original_repo; t; t = TREE_CHAIN (t))
417 if (! IDENTIFIER_REPO_USED (TREE_VALUE (t))
418 || (! TREE_PURPOSE (t) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t))))
423 IDENTIFIER_REPO_USED (TREE_VALUE (t)) = 0;
426 /* Are there any templates that are newly used? */
429 for (t = pending_repo; t; t = TREE_CHAIN (t))
431 if (IDENTIFIER_REPO_USED (TREE_VALUE (t)))
439 args = getenv ("COLLECT_GCC_OPTIONS");
441 if (! repo_changed && pending_repo)
442 if (strcmp (old_main, main_input_filename) != 0
443 || strcmp (old_dir, dir) != 0
444 || (args == NULL) != (old_args == NULL)
445 || (args && strcmp (old_args, args) != 0))
448 if (! repo_changed || errorcount || sorrycount)
451 reopen_repo_file_for_write ();
456 fprintf (repo_file, "M %s\n", main_input_filename);
457 fprintf (repo_file, "D %s\n", dir);
459 fprintf (repo_file, "A %s\n", args);
461 for (t = pending_repo; t; t = TREE_CHAIN (t))
463 tree val = TREE_VALUE (t);
464 char type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
466 fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));