1 /* Code to maintain a C++ template repository.
2 Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001 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 #include "diagnostic.h"
38 static tree repo_get_id PARAMS ((tree));
39 static char *extract_string PARAMS ((char **));
40 static char *get_base_filename PARAMS ((const char *));
41 static void open_repo_file PARAMS ((const char *));
42 static char *afgets PARAMS ((FILE *));
43 static void reopen_repo_file_for_write PARAMS ((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 static 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));
114 return DECL_ASSEMBLER_NAME (t);
117 /* Note that a template has been used. If we can see the definition, offer
121 repo_template_used (t)
126 if (! flag_use_repository)
129 id = repo_get_id (t);
135 if (IDENTIFIER_REPO_CHOSEN (id))
136 mark_class_instantiated (t, 0);
140 if (IDENTIFIER_REPO_CHOSEN (id))
141 /* It doesn't make sense to instantiate a clone, so we
142 instantiate the cloned function instead. Note that this
143 approach will not work correctly if collect2 assigns
144 different clones to different files -- but it shouldn't. */
145 mark_decl_instantiated (DECL_CLONED_FUNCTION_P (t)
146 ? DECL_CLONED_FUNCTION (t) : t,
150 my_friendly_abort (1);
152 if (! IDENTIFIER_REPO_USED (id))
154 IDENTIFIER_REPO_USED (id) = 1;
155 pending_repo = tree_cons (NULL_TREE, id, pending_repo);
160 /* Note that the vtable for a class has been used, and offer to emit it. */
166 if (! flag_use_repository)
169 pending_repo = tree_cons (NULL_TREE, t, pending_repo);
172 /* Note that an inline with external linkage has been used, and offer to
176 repo_inline_used (fn)
179 if (! flag_use_repository)
182 /* Member functions of polymorphic classes go with their vtables. */
183 if (DECL_FUNCTION_MEMBER_P (fn)
184 && TYPE_POLYMORPHIC_P (DECL_CONTEXT (fn)))
186 repo_vtable_used (DECL_CONTEXT (fn));
190 pending_repo = tree_cons (NULL_TREE, fn, pending_repo);
193 /* Note that a particular typeinfo node has been used, and offer to
204 repo_template_instantiated (t, extern_p)
210 tree id = repo_get_id (t);
212 IDENTIFIER_REPO_CHOSEN (id) = 1;
216 /* Parse a reasonable subset of shell quoting syntax. */
233 obstack_1grow (&temporary_obstack, c);
234 else if (! inside && c == ' ')
236 else if (! inside && c == '\\')
241 obstack_1grow (&temporary_obstack, c);
244 obstack_1grow (&temporary_obstack, '\0');
246 return obstack_finish (&temporary_obstack);
250 get_base_filename (filename)
251 const char *filename;
253 char *p = getenv ("COLLECT_GCC_OPTIONS");
259 char *q = extract_string (&p);
261 if (strcmp (q, "-o") == 0)
262 output = extract_string (&p);
263 else if (strcmp (q, "-c") == 0)
267 if (compiling && output)
270 if (p && ! compiling)
272 warning ("-frepo must be used with -c");
273 flag_use_repository = 0;
277 return lbasename (filename);
281 open_repo_file (filename)
282 const char *filename;
284 register const char *p;
285 const char *s = get_base_filename (filename);
291 p = strrchr (p, '.');
295 obstack_grow (&permanent_obstack, s, p - s);
296 repo_name = obstack_copy0 (&permanent_obstack, ".rpo", 4);
298 repo_file = fopen (repo_name, "r");
306 while ((c = getc (stream)) != EOF && c != '\n')
307 obstack_1grow (&temporary_obstack, c);
308 if (obstack_object_size (&temporary_obstack) == 0)
310 obstack_1grow (&temporary_obstack, '\0');
311 return obstack_finish (&temporary_obstack);
316 const char *filename;
320 if (! flag_use_repository)
323 ggc_add_tree_root (&pending_repo, 1);
324 ggc_add_tree_root (&original_repo, 1);
325 gcc_obstack_init (&temporary_obstack);
327 open_repo_file (filename);
332 while ((buf = afgets (repo_file)))
337 old_args = obstack_copy0 (&permanent_obstack, buf + 2,
341 old_dir = obstack_copy0 (&permanent_obstack, buf + 2,
345 old_main = obstack_copy0 (&permanent_obstack, buf + 2,
351 tree id = get_identifier (buf + 2);
356 IDENTIFIER_REPO_CHOSEN (id) = 1;
357 orig = integer_one_node;
362 original_repo = tree_cons (orig, id, original_repo);
366 error ("mysterious repository information in %s", repo_name);
368 obstack_free (&temporary_obstack, buf);
373 reopen_repo_file_for_write ()
377 repo_file = fopen (repo_name, "w");
381 error ("can't create repository information file `%s'", repo_name);
382 flag_use_repository = 0;
386 /* Emit any pending repos. */
392 int repo_changed = 0;
395 if (! flag_use_repository)
398 /* Do we have to write out a new info file? */
400 /* Are there any old templates that aren't used any longer or that are
403 for (t = original_repo; t; t = TREE_CHAIN (t))
405 if (! IDENTIFIER_REPO_USED (TREE_VALUE (t))
406 || (! TREE_PURPOSE (t) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t))))
411 IDENTIFIER_REPO_USED (TREE_VALUE (t)) = 0;
414 /* Are there any templates that are newly used? */
417 for (t = pending_repo; t; t = TREE_CHAIN (t))
419 if (IDENTIFIER_REPO_USED (TREE_VALUE (t)))
427 args = getenv ("COLLECT_GCC_OPTIONS");
429 if (! repo_changed && pending_repo)
430 if (strcmp (old_main, main_input_filename) != 0
431 || strcmp (old_dir, dir) != 0
432 || (args == NULL) != (old_args == NULL)
433 || (args && strcmp (old_args, args) != 0))
436 if (! repo_changed || errorcount || sorrycount)
439 reopen_repo_file_for_write ();
444 fprintf (repo_file, "M %s\n", main_input_filename);
445 fprintf (repo_file, "D %s\n", dir);
447 fprintf (repo_file, "A %s\n", args);
449 for (t = pending_repo; t; t = TREE_CHAIN (t))
451 tree val = TREE_VALUE (t);
452 char type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
454 fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));