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/* Some code common to C and ObjC front ends.
Copyright (C) 2001, 2002, 2003, 2004, 2005 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 "c-tree.h"
#include "c-pretty-print.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 "tree-mudflap.h"
#include "target.h"
#include "c-objc-common.h"
static bool c_tree_printer (pretty_printer *, text_info *);
bool
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;
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 (0, "%Jfunction %qF 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 (0, "%Jfunction %qF 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 (0, "%Jfunction %qF can never be inlined because it uses "
"attributes conflicting with inlining", 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)
{
c_init_decl_processing ();
if (c_common_init () == false)
return false;
/* 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;
/* 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;
}
/* 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 identifier or 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);
tree name;
const char *n = "({anonymous})";
c_pretty_printer *cpp = (c_pretty_printer *) pp;
pp->padding = pp_none;
switch (*text->format_spec)
{
case 'D':
if (DECL_DEBUG_EXPR (t) && DECL_DEBUG_EXPR_IS_FROM (t))
{
t = DECL_DEBUG_EXPR (t);
if (!DECL_P (t))
{
pp_c_expression (cpp, t);
return true;
}
}
/* FALLTHRU */
case 'F':
if (DECL_NAME (t))
n = lang_hooks.decl_printable_name (t, 2);
break;
case 'T':
gcc_assert (TYPE_P (t));
name = TYPE_NAME (t);
if (name && TREE_CODE (name) == TYPE_DECL)
{
if (DECL_NAME (name))
pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
else
pp_type_id (cpp, t);
return true;
}
else
{
pp_type_id (cpp, t);
return true;
}
break;
case 'E':
if (TREE_CODE (t) == IDENTIFIER_NODE)
n = IDENTIFIER_POINTER (t);
else
{
pp_expression (cpp, t);
return true;
}
break;
default:
return false;
}
pp_string (cpp, n);
return true;
}
/* In C and ObjC, all decls have "C" linkage. */
bool
has_c_linkage (tree decl ATTRIBUTE_UNUSED)
{
return true;
}
void
c_initialize_diagnostics (diagnostic_context *context)
{
pretty_printer *base = context->printer;
c_pretty_printer *pp = XNEW (c_pretty_printer);
memcpy (pp_base (pp), base, sizeof (pretty_printer));
pp_c_pretty_printer_init (pp);
context->printer = (pretty_printer *) pp;
/* It is safe to free this object because it was previously XNEW()'d. */
XDELETE (base);
}
int
c_types_compatible_p (tree x, tree y)
{
return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
}
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