freebsd-dev/contrib/gcc/c-objc-common.c
2004-07-28 03:11:36 +00:00

335 lines
8.1 KiB
C

/* Some code common to C and ObjC front ends.
Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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.
GCC 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 GCC; 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 "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "insn-config.h"
#include "integrate.h"
#include "expr.h"
#include "c-tree.h"
#include "function.h"
#include "flags.h"
#include "toplev.h"
#include "diagnostic.h"
#include "tree-inline.h"
#include "varray.h"
#include "ggc.h"
#include "langhooks.h"
#include "target.h"
#include "cgraph.h"
static bool c_tree_printer (pretty_printer *, text_info *);
static tree start_cdtor (int);
static void finish_cdtor (tree);
int
c_missing_noreturn_ok_p (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));
}
/* We want to inline `extern inline' functions even if this would
violate inlining limits. Some glibc and linux constructs depend on
such functions always being inlined when optimizing. */
int
c_disregard_inline_limits (tree fn)
{
if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
return 1;
return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
&& DECL_EXTERNAL (fn));
}
int
c_cannot_inline_tree_fn (tree *fnp)
{
tree fn = *fnp;
tree t;
bool do_warning = (warn_inline
&& DECL_INLINE (fn)
&& DECL_DECLARED_INLINE_P (fn)
&& !DECL_IN_SYSTEM_HEADER (fn));
if (flag_really_no_inline
&& lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
{
if (do_warning)
warning ("%Jfunction '%F' can never be inlined because it "
"is suppressed using -fno-inline", fn, fn);
goto cannot_inline;
}
/* Don't auto-inline anything that might not be bound within
this unit of translation. */
if (!DECL_DECLARED_INLINE_P (fn) && !(*targetm.binds_local_p) (fn))
{
if (do_warning)
warning ("%Jfunction '%F' can never be inlined because it might not "
"be bound within this unit of translation", fn, fn);
goto cannot_inline;
}
if (! function_attribute_inlinable_p (fn))
{
if (do_warning)
warning ("%Jfunction '%F' can never be inlined because it uses "
"attributes conflicting with inlining", fn, fn);
goto cannot_inline;
}
/* If a function has pending sizes, we must not defer its
compilation, and we can't inline it as a tree. */
if (fn == current_function_decl)
{
t = get_pending_sizes ();
put_pending_sizes (t);
if (t)
{
if (do_warning)
warning ("%Jfunction '%F' can never be inlined because it has "
"pending sizes", fn, fn);
goto cannot_inline;
}
}
if (! DECL_FILE_SCOPE_P (fn))
{
/* If a nested function has pending sizes, we may have already
saved them. */
if (DECL_LANG_SPECIFIC (fn)->pending_sizes)
{
if (do_warning)
warning ("%Jnested function '%F' can never be inlined because it "
"has possibly saved pending sizes", fn, fn);
goto cannot_inline;
}
}
return 0;
cannot_inline:
DECL_UNINLINABLE (fn) = 1;
return 1;
}
/* Called from check_global_declarations. */
bool
c_warn_unused_global_decl (tree decl)
{
if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
return false;
if (DECL_IN_SYSTEM_HEADER (decl))
return false;
return true;
}
/* Initialization common to C and Objective-C front ends. */
bool
c_objc_common_init (void)
{
static const enum tree_code stmt_codes[] = {
c_common_stmt_codes
};
INIT_STATEMENT_CODES (stmt_codes);
c_init_decl_processing ();
if (c_common_init () == false)
return false;
lang_expand_decl_stmt = c_expand_decl_stmt;
/* These were not defined in the Objective-C front end, but I'm
putting them here anyway. The diagnostic format decoder might
want an enhanced ObjC implementation. */
diagnostic_format_decoder (global_dc) = &c_tree_printer;
lang_missing_noreturn_ok_p = &c_missing_noreturn_ok_p;
/* 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;
}
return true;
}
static tree
start_cdtor (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);
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 (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 ();
}
/* Called at end of parsing, but before end-of-file processing. */
void
c_objc_common_finish_file (void)
{
if (pch_file)
c_common_write_pch ();
/* If multiple translation units were built, copy information between
them based on linkage rules. */
merge_translation_unit_decls ();
cgraph_finalize_compilation_unit ();
cgraph_optimize ();
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);
}
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);
}
{
int flags;
FILE *stream = dump_begin (TDI_all, &flags);
if (stream)
{
dump_node (getdecls (), flags & ~TDF_SLIM, stream);
dump_end (TDI_all, stream);
}
}
}
/* 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,
%E: An expression,
%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 bool
c_tree_printer (pretty_printer *pp, text_info *text)
{
tree t = va_arg (*text->args_ptr, tree);
const char *n = "({anonymous})";
switch (*text->format_spec)
{
case 'D':
case 'F':
if (DECL_NAME (t))
n = (*lang_hooks.decl_printable_name) (t, 2);
break;
case 'T':
if (TREE_CODE (t) == TYPE_DECL)
{
if (DECL_NAME (t))
n = (*lang_hooks.decl_printable_name) (t, 2);
}
else
{
t = TYPE_NAME (t);
if (t)
n = IDENTIFIER_POINTER (t);
}
break;
case 'E':
if (TREE_CODE (t) == IDENTIFIER_NODE)
n = IDENTIFIER_POINTER (t);
else
return false;
break;
default:
return false;
}
pp_string (pp, n);
return true;
}