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/* Language-specific hook definitions for C front end.
Copyright (C) 1991, 1995, 1997, 1998,
1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "config.h"
#include "system.h"
#include "tree.h"
#include "function.h"
#include "input.h"
#include "toplev.h"
#include "diagnostic.h"
#include "output.h"
#include "flags.h"
#include "ggc.h"
#include "rtl.h"
#include "expr.h"
#include "c-tree.h"
#include "c-lex.h"
#include "cpplib.h"
static int c_tree_printer PARAMS ((output_buffer *));
static int c_missing_noreturn_ok_p PARAMS ((tree));
static void c_init PARAMS ((void));
static void c_init_options PARAMS ((void));
static void c_post_options PARAMS ((void));
/* Each front end provides its own. */
struct lang_hooks lang_hooks = {c_init,
NULL, /* c_finish */
c_init_options,
c_decode_option,
c_post_options};
/* Post-switch processing. */
static void
c_post_options ()
{
cpp_post_options (parse_in);
}
static void
c_init_options ()
{
/* Make identifier nodes long enough for the language-specific slots. */
set_identifier_size (sizeof (struct lang_identifier));
parse_in = cpp_create_reader (ident_hash, CLK_GNUC89);
/* Mark as "unspecified". */
flag_bounds_check = -1;
}
static void
c_init ()
{
c_common_lang_init ();
/* If still unspecified, make it match -std=c99
(allowing for -pedantic-errors). */
if (mesg_implicit_function_declaration < 0)
{
if (flag_isoc99)
mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
else
mesg_implicit_function_declaration = 0;
}
save_lang_status = &push_c_function_context;
restore_lang_status = &pop_c_function_context;
mark_lang_status = &mark_c_function_context;
lang_expand_expr = &c_expand_expr;
lang_safe_from_p = &c_safe_from_p;
lang_printer = &c_tree_printer;
lang_expand_decl_stmt = &c_expand_decl_stmt;
lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p;
c_parse_init ();
}
const char *
lang_identify ()
{
return "c";
}
void
print_lang_statistics ()
{
}
/* used by print-tree.c */
void
lang_print_xnode (file, node, indent)
FILE *file ATTRIBUTE_UNUSED;
tree node ATTRIBUTE_UNUSED;
int indent ATTRIBUTE_UNUSED;
{
}
/* Used by c-lex.c, but only for objc. */
tree
lookup_interface (arg)
tree arg ATTRIBUTE_UNUSED;
{
return 0;
}
tree
is_class_name (arg)
tree arg ATTRIBUTE_UNUSED;
{
return 0;
}
void
maybe_objc_check_decl (decl)
tree decl ATTRIBUTE_UNUSED;
{
}
int
maybe_objc_comptypes (lhs, rhs, reflexive)
tree lhs ATTRIBUTE_UNUSED;
tree rhs ATTRIBUTE_UNUSED;
int reflexive ATTRIBUTE_UNUSED;
{
return -1;
}
tree
maybe_building_objc_message_expr ()
{
return 0;
}
int
recognize_objc_keyword ()
{
return 0;
}
/* Used by c-typeck.c (build_external_ref), but only for objc. */
tree
lookup_objc_ivar (id)
tree id ATTRIBUTE_UNUSED;
{
return 0;
}
#if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
extern tree static_ctors;
extern tree static_dtors;
static tree start_cdtor PARAMS ((int));
static void finish_cdtor PARAMS ((tree));
static tree
start_cdtor (method_type)
int method_type;
{
tree fnname = get_file_function_name (method_type);
tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
tree body;
start_function (void_list_node_1,
build_nt (CALL_EXPR, fnname,
tree_cons (NULL_TREE, NULL_TREE, void_list_node_1),
NULL_TREE),
NULL_TREE, NULL_TREE);
store_parm_decls ();
current_function_cannot_inline
= "static constructors and destructors cannot be inlined";
body = c_begin_compound_stmt ();
pushlevel (0);
clear_last_expr ();
add_scope_stmt (/*begin_p=*/1, /*partial_p=*/0);
return body;
}
static void
finish_cdtor (body)
tree body;
{
tree scope;
tree block;
scope = add_scope_stmt (/*begin_p=*/0, /*partial_p=*/0);
block = poplevel (0, 0, 0);
SCOPE_STMT_BLOCK (TREE_PURPOSE (scope)) = block;
SCOPE_STMT_BLOCK (TREE_VALUE (scope)) = block;
RECHAIN_STMTS (body, COMPOUND_BODY (body));
finish_function (0);
}
#endif
/* Called at end of parsing, but before end-of-file processing. */
void
finish_file ()
{
#ifndef ASM_OUTPUT_CONSTRUCTOR
if (static_ctors)
{
tree body = start_cdtor ('I');
for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
c_expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
NULL_TREE));
finish_cdtor (body);
}
#endif
#ifndef ASM_OUTPUT_DESTRUCTOR
if (static_dtors)
{
tree body = start_cdtor ('D');
for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
c_expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
NULL_TREE));
finish_cdtor (body);
}
#endif
if (back_end_hook)
(*back_end_hook) (getdecls ());
if (flag_dump_translation_unit)
dump_node_to_file (getdecls (), flag_dump_translation_unit);
}
/* Called during diagnostic message formatting process to print a
source-level entity onto BUFFER. The meaning of the format specifiers
is as follows:
%D: a general decl,
%F: a function declaration,
%T: a type.
These format specifiers form a subset of the format specifiers set used
by the C++ front-end.
Please notice when called, the `%' part was already skipped by the
diagnostic machinery. */
static int
c_tree_printer (buffer)
output_buffer *buffer;
{
tree t = va_arg (output_buffer_format_args (buffer), tree);
switch (*output_buffer_text_cursor (buffer))
{
case 'D':
case 'F':
case 'T':
{
const char *n = DECL_NAME (t)
? (*decl_printable_name) (t, 2)
: "({anonymous})";
output_add_string (buffer, n);
}
return 1;
default:
return 0;
}
}
static int
c_missing_noreturn_ok_p (decl)
tree decl;
{
/* A missing noreturn is not ok for freestanding implementations and
ok for the `main' function in hosted implementations. */
return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
}
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