410 lines
8.0 KiB
C
410 lines
8.0 KiB
C
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/* Code to maintain a C++ template repository.
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Copyright (C) 1995 Free Software Foundation, Inc.
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Contributed by Jason Merrill (jason@cygnus.com)
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* My strategy here is as follows:
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Everything should be emitted in a translation unit where it is used.
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The results of the automatic process should be easily reproducible with
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explicit code. */
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#include <stdio.h>
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#include "config.h"
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#include "tree.h"
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#include "cp-tree.h"
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#include "input.h"
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#include "obstack.h"
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extern char * rindex ();
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extern char * getenv ();
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extern char * getpwd ();
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static tree pending_repo;
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static tree original_repo;
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static char *repo_name;
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static FILE *repo_file;
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extern int flag_use_repository;
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extern int errorcount, sorrycount;
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extern struct obstack temporary_obstack;
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extern struct obstack permanent_obstack;
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#define IDENTIFIER_REPO_USED(NODE) (TREE_LANG_FLAG_3 (NODE))
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#define IDENTIFIER_REPO_CHOSEN(NODE) (TREE_LANG_FLAG_4 (NODE))
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/* Record the flags used to compile this translation unit. */
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void
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repo_compile_flags (argc, argv)
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int argc;
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char **argv;
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{
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}
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/* If this template has not been seen before, add a note to the repository
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saying where the declaration was. This may be used to find the
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definition at link time. */
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void
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repo_template_declared (t)
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tree t;
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{}
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/* Note where the definition of a template lives so that instantiations can
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be generated later. */
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void
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repo_template_defined (t)
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tree t;
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{}
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/* Note where the definition of a class lives to that template
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instantiations can use it. */
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void
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repo_class_defined (t)
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tree t;
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{}
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tree
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repo_get_id (t)
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tree t;
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{
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if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
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{
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t = TYPE_BINFO_VTABLE (t);
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if (t == NULL_TREE)
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return t;
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}
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return DECL_ASSEMBLER_NAME (t);
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}
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/* Note that a template has been used. If we can see the definition, offer
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to emit it. */
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void
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repo_template_used (t)
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tree t;
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{
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tree id;
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if (! flag_use_repository)
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return;
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id = repo_get_id (t);
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if (id == NULL_TREE)
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return;
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if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
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{
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if (IDENTIFIER_REPO_CHOSEN (id))
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mark_class_instantiated (t, 0);
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}
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else if (TREE_CODE_CLASS (TREE_CODE (t)) == 'd')
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{
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if (IDENTIFIER_REPO_CHOSEN (id))
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mark_function_instantiated (t, 0);
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}
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else
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my_friendly_abort (1);
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if (! IDENTIFIER_REPO_USED (id))
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{
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IDENTIFIER_REPO_USED (id) = 1;
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pending_repo = perm_tree_cons (NULL_TREE, id, pending_repo);
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}
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}
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/* Note that the vtable for a class has been used, and offer to emit it. */
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void
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repo_vtable_used (t)
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tree t;
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{
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if (! flag_use_repository)
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return;
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pending_repo = perm_tree_cons (NULL_TREE, t, pending_repo);
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}
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/* Note that an inline with external linkage has been used, and offer to
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emit it. */
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void
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repo_inline_used (fn)
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tree fn;
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{
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if (! flag_use_repository)
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return;
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/* Member functions of polymorphic classes go with their vtables. */
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if (DECL_FUNCTION_MEMBER_P (fn) && TYPE_VIRTUAL_P (DECL_CLASS_CONTEXT (fn)))
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{
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repo_vtable_used (DECL_CLASS_CONTEXT (fn));
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return;
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}
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pending_repo = perm_tree_cons (NULL_TREE, fn, pending_repo);
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}
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/* Note that a particular typeinfo node has been used, and offer to
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emit it. */
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void
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repo_tinfo_used (ti)
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tree ti;
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{
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}
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void
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repo_template_instantiated (t, extern_p)
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tree t;
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int extern_p;
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{
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if (! extern_p)
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{
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tree id = repo_get_id (t);
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if (id)
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IDENTIFIER_REPO_CHOSEN (id) = 1;
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}
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}
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static char *
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save_string (s, len)
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char *s;
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int len;
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{
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return obstack_copy0 (&temporary_obstack, s, len);
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}
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static char *
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get_base_filename (filename)
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char *filename;
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{
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char *p = getenv ("COLLECT_GCC_OPTIONS");
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char *output = 0;
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int compiling = 0;
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if (p)
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while (*p)
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{
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char *q = p;
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while (*q && *q != ' ') q++;
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if (*p == '-' && p[1] == 'o')
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{
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p += 2;
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if (p == q)
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{
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p++; q++;
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if (*q)
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while (*q && *q != ' ') q++;
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}
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output = save_string (p, q - p);
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}
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else if (*p == '-' && p[1] == 'c')
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compiling = 1;
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if (*q) q++;
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p = q;
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}
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if (compiling && output)
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return output;
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if (p && ! compiling)
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{
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warning ("-frepo must be used with -c");
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flag_use_repository = 0;
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return NULL;
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}
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p = rindex (filename, '/');
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if (p)
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return p+1;
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else
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return filename;
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}
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static void
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open_repo_file (filename)
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char *filename;
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{
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register char *p, *q;
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char *s = get_base_filename (filename);
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if (s == NULL)
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return;
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p = rindex (s, '/');
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if (! p)
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p = s;
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p = rindex (p, '.');
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if (! p)
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p = s + strlen (s);
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obstack_grow (&permanent_obstack, s, p - s);
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repo_name = obstack_copy0 (&permanent_obstack, ".rpo", 4);
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repo_file = fopen (repo_name, "r");
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}
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static char *
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afgets (stream)
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FILE *stream;
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{
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int c;
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while ((c = getc (stream)) != EOF && c != '\n')
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obstack_1grow (&temporary_obstack, c);
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if (obstack_object_size (&temporary_obstack) == 0)
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return NULL;
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obstack_1grow (&temporary_obstack, '\0');
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return obstack_finish (&temporary_obstack);
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}
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void
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init_repo (filename)
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char *filename;
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{
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char *buf;
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if (! flag_use_repository)
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return;
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open_repo_file (filename);
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if (repo_file == 0)
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return;
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while (buf = afgets (repo_file))
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{
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switch (buf[0])
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{
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case 'A':
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case 'D':
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case 'M':
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break;
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case 'C':
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case 'O':
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{
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tree id = get_identifier (buf + 2);
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tree orig;
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if (buf[0] == 'C')
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{
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IDENTIFIER_REPO_CHOSEN (id) = 1;
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orig = integer_one_node;
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}
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else
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orig = NULL_TREE;
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original_repo = perm_tree_cons (orig, id, original_repo);
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}
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break;
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default:
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error ("mysterious repository information in %s", repo_name);
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}
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obstack_free (&temporary_obstack, buf);
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}
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}
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static void
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reopen_repo_file_for_write ()
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{
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if (repo_file)
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fclose (repo_file);
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repo_file = fopen (repo_name, "w");
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if (repo_file == 0)
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{
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error ("can't create repository information file `%s'", repo_name);
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flag_use_repository = 0;
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}
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}
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/* Emit any pending repos. */
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void
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finish_repo ()
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{
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tree t;
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char *p;
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int repo_changed = 0;
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if (! flag_use_repository)
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return;
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/* Do we have to write out a new info file? */
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/* Are there any old templates that aren't used any longer or that are
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newly chosen? */
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for (t = original_repo; t; t = TREE_CHAIN (t))
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{
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if (! IDENTIFIER_REPO_USED (TREE_VALUE (t))
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|| (! TREE_PURPOSE (t) && IDENTIFIER_REPO_CHOSEN (TREE_VALUE (t))))
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{
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repo_changed = 1;
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break;
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}
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IDENTIFIER_REPO_USED (TREE_VALUE (t)) = 0;
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}
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/* Are there any templates that are newly used? */
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if (! repo_changed)
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for (t = pending_repo; t; t = TREE_CHAIN (t))
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{
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if (IDENTIFIER_REPO_USED (TREE_VALUE (t)))
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{
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repo_changed = 1;
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break;
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}
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}
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if (! repo_changed || errorcount || sorrycount)
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goto out;
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reopen_repo_file_for_write ();
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if (repo_file == 0)
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goto out;
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fprintf (repo_file, "M %s\n", main_input_filename);
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p = getpwd ();
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fprintf (repo_file, "D %s\n", p);
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p = getenv ("COLLECT_GCC_OPTIONS");
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if (p != 0)
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fprintf (repo_file, "A %s\n", p);
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for (t = pending_repo; t; t = TREE_CHAIN (t))
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{
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tree val = TREE_VALUE (t);
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char type = IDENTIFIER_REPO_CHOSEN (val) ? 'C' : 'O';
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fprintf (repo_file, "%c %s\n", type, IDENTIFIER_POINTER (val));
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}
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out:
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if (repo_file)
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fclose (repo_file);
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}
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