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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [c-objc-common.c] - Blame information for rev 816

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/* Some code common to C and ObjC front ends.
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   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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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 GCC; see the file COPYING3.  If not see
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<http://www.gnu.org/licenses/>.  */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "rtl.h"
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#include "insn-config.h"
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#include "integrate.h"
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#include "c-tree.h"
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#include "c-pretty-print.h"
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#include "function.h"
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#include "flags.h"
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#include "toplev.h"
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#include "diagnostic.h"
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#include "tree-inline.h"
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#include "varray.h"
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#include "ggc.h"
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#include "langhooks.h"
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#include "tree-mudflap.h"
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#include "target.h"
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#include "c-objc-common.h"
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static bool c_tree_printer (pretty_printer *, text_info *, const char *,
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                            int, bool, bool, bool);
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bool
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c_missing_noreturn_ok_p (tree decl)
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{
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  /* A missing noreturn is not ok for freestanding implementations and
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     ok for the `main' function in hosted implementations.  */
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  return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
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}
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/* We want to inline `extern inline' functions even if this would
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   violate inlining limits.  Some glibc and linux constructs depend on
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   such functions always being inlined when optimizing.  */
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int
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c_disregard_inline_limits (tree fn)
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{
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  if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
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    return 1;
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  return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
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          && DECL_EXTERNAL (fn));
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}
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int
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c_cannot_inline_tree_fn (tree *fnp)
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{
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  tree fn = *fnp;
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  bool do_warning = (warn_inline
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                     && DECL_INLINE (fn)
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                     && DECL_DECLARED_INLINE_P (fn)
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                     && !DECL_IN_SYSTEM_HEADER (fn));
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  if (flag_really_no_inline
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      && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
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    {
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      if (do_warning)
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        warning (OPT_Winline, "function %q+F can never be inlined because it "
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                 "is suppressed using -fno-inline", fn);
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      goto cannot_inline;
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    }
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  /* Don't auto-inline anything that might not be bound within
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     this unit of translation.  */
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  if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn))
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    {
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      if (do_warning)
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        warning (OPT_Winline, "function %q+F can never be inlined because it "
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                 "might not be bound within this unit of translation", fn);
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      goto cannot_inline;
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    }
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  if (!function_attribute_inlinable_p (fn))
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    {
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      if (do_warning)
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        warning (OPT_Winline, "function %q+F can never be inlined because it "
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                 "uses attributes conflicting with inlining", fn);
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      goto cannot_inline;
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    }
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  return 0;
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 cannot_inline:
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  DECL_UNINLINABLE (fn) = 1;
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  return 1;
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}
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/* Called from check_global_declarations.  */
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bool
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c_warn_unused_global_decl (tree decl)
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{
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  if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
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    return false;
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  if (DECL_IN_SYSTEM_HEADER (decl))
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    return false;
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  return true;
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}
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/* Initialization common to C and Objective-C front ends.  */
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bool
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c_objc_common_init (void)
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{
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  c_init_decl_processing ();
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  if (c_common_init () == false)
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    return false;
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  /* These were not defined in the Objective-C front end, but I'm
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     putting them here anyway.  The diagnostic format decoder might
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     want an enhanced ObjC implementation.  */
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  diagnostic_format_decoder (global_dc) = &c_tree_printer;
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  /* If still unspecified, make it match -std=c99
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     (allowing for -pedantic-errors).  */
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  if (mesg_implicit_function_declaration < 0)
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    {
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      if (flag_isoc99)
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        mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
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      else
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        mesg_implicit_function_declaration = 0;
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    }
146
 
147
  return true;
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}
149
 
150
/* Called during diagnostic message formatting process to print a
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   source-level entity onto BUFFER.  The meaning of the format specifiers
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   is as follows:
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   %D: a general decl,
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   %E: an identifier or expression,
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   %F: a function declaration,
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   %T: a type.
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   These format specifiers form a subset of the format specifiers set used
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   by the C++ front-end.
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   Please notice when called, the `%' part was already skipped by the
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   diagnostic machinery.  */
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static bool
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c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
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                int precision, bool wide, bool set_locus, bool hash)
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{
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  tree t = va_arg (*text->args_ptr, tree);
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  tree name;
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  const char *n = "({anonymous})";
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  c_pretty_printer *cpp = (c_pretty_printer *) pp;
170
  pp->padding = pp_none;
171
 
172
  if (precision != 0 || wide || hash)
173
    return false;
174
 
175
  if (set_locus && text->locus)
176
    *text->locus = DECL_SOURCE_LOCATION (t);
177
 
178
  switch (*spec)
179
    {
180
    case 'D':
181
      if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
182
        {
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          t = DECL_DEBUG_EXPR (t);
184
          if (!DECL_P (t))
185
            {
186
              pp_c_expression (cpp, t);
187
              return true;
188
            }
189
        }
190
      /* FALLTHRU */
191
 
192
    case 'F':
193
      if (DECL_NAME (t))
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        n = lang_hooks.decl_printable_name (t, 2);
195
      break;
196
 
197
    case 'T':
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      gcc_assert (TYPE_P (t));
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      name = TYPE_NAME (t);
200
 
201
      if (name && TREE_CODE (name) == TYPE_DECL)
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        {
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          if (DECL_NAME (name))
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            pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
205
          else
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            pp_type_id (cpp, t);
207
          return true;
208
        }
209
      else
210
        {
211
          pp_type_id (cpp, t);
212
          return true;
213
        }
214
      break;
215
 
216
    case 'E':
217
      if (TREE_CODE (t) == IDENTIFIER_NODE)
218
        n = IDENTIFIER_POINTER (t);
219
      else
220
        {
221
          pp_expression (cpp, t);
222
          return true;
223
        }
224
      break;
225
 
226
    default:
227
      return false;
228
    }
229
 
230
  pp_string (cpp, n);
231
  return true;
232
}
233
 
234
/* In C and ObjC, all decls have "C" linkage.  */
235
bool
236
has_c_linkage (tree decl ATTRIBUTE_UNUSED)
237
{
238
  return true;
239
}
240
 
241
void
242
c_initialize_diagnostics (diagnostic_context *context)
243
{
244
  pretty_printer *base = context->printer;
245
  c_pretty_printer *pp = XNEW (c_pretty_printer);
246
  memcpy (pp_base (pp), base, sizeof (pretty_printer));
247
  pp_c_pretty_printer_init (pp);
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  context->printer = (pretty_printer *) pp;
249
 
250
  /* It is safe to free this object because it was previously XNEW()'d.  */
251
  XDELETE (base);
252
}
253
 
254
int
255
c_types_compatible_p (tree x, tree y)
256
{
257
    return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
258
}
259
 
260
/* Determine if the type is a vla type for the backend.  */
261
 
262
bool
263
c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED)
264
{
265
  return c_vla_type_p (x);
266
}

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