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/* Subroutines for the C front end on the TMS320C[34]x
Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
2007 Free Software Foundation, Inc.
Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz)
and Herman Ten Brugge (Haj.Ten.Brugge@net.HCC.nl).
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 3, 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 COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "toplev.h"
#include "cpplib.h"
#include "c-pragma.h"
#include "tm_p.h"
static int c4x_parse_pragma (const char *, tree *, tree *);
/* Handle machine specific pragmas for compatibility with existing
compilers for the C3x/C4x.
pragma attribute
----------------------------------------------------------
CODE_SECTION(symbol,"section") section("section")
DATA_SECTION(symbol,"section") section("section")
FUNC_CANNOT_INLINE(function)
FUNC_EXT_CALLED(function)
FUNC_IS_PURE(function) const
FUNC_IS_SYSTEM(function)
FUNC_NEVER_RETURNS(function) noreturn
FUNC_NO_GLOBAL_ASG(function)
FUNC_NO_IND_ASG(function)
INTERRUPT(function) interrupt
*/
/* Parse a C4x pragma, of the form ( function [, "section"] ) \n.
FUNC is loaded with the IDENTIFIER_NODE of the function, SECT with
the STRING_CST node of the string. If SECT is null, then this
pragma doesn't take a section string. Returns 0 for a good pragma,
-1 for a malformed pragma. */
#define BAD(gmsgid, arg) \
do { warning (OPT_Wpragmas, gmsgid, arg); return -1; } while (0)
static int
c4x_parse_pragma (const char *name, tree *func, tree *sect)
{
tree f, s, x;
if (pragma_lex (&x) != CPP_OPEN_PAREN)
BAD ("missing '(' after '#pragma %s' - ignored", name);
if (pragma_lex (&f) != CPP_NAME)
BAD ("missing function name in '#pragma %s' - ignored", name);
if (sect)
{
if (pragma_lex (&x) != CPP_COMMA)
BAD ("malformed '#pragma %s' - ignored", name);
if (pragma_lex (&s) != CPP_STRING)
BAD ("missing section name in '#pragma %s' - ignored", name);
*sect = s;
}
if (pragma_lex (&x) != CPP_CLOSE_PAREN)
BAD ("missing ')' for '#pragma %s' - ignored", name);
if (pragma_lex (&x) != CPP_EOF)
warning (OPT_Wpragmas, "junk at end of '#pragma %s'", name);
*func = f;
return 0;
}
void
c4x_pr_CODE_SECTION (cpp_reader *pfile ATTRIBUTE_UNUSED)
{
tree func, sect;
if (c4x_parse_pragma ("CODE_SECTION", &func, §))
return;
code_tree = chainon (code_tree,
build_tree_list (func,
build_tree_list (NULL_TREE, sect)));
}
void
c4x_pr_DATA_SECTION (cpp_reader *pfile ATTRIBUTE_UNUSED)
{
tree func, sect;
if (c4x_parse_pragma ("DATA_SECTION", &func, §))
return;
data_tree = chainon (data_tree,
build_tree_list (func,
build_tree_list (NULL_TREE, sect)));
}
void
c4x_pr_FUNC_IS_PURE (cpp_reader *pfile ATTRIBUTE_UNUSED)
{
tree func;
if (c4x_parse_pragma ("FUNC_IS_PURE", &func, 0))
return;
pure_tree = chainon (pure_tree, build_tree_list (func, NULL_TREE));
}
void
c4x_pr_FUNC_NEVER_RETURNS (cpp_reader *pfile ATTRIBUTE_UNUSED)
{
tree func;
if (c4x_parse_pragma ("FUNC_NEVER_RETURNS", &func, 0))
return;
noreturn_tree = chainon (noreturn_tree, build_tree_list (func, NULL_TREE));
}
void
c4x_pr_INTERRUPT (cpp_reader *pfile ATTRIBUTE_UNUSED)
{
tree func;
if (c4x_parse_pragma ("INTERRUPT", &func, 0))
return;
interrupt_tree = chainon (interrupt_tree, build_tree_list (func, NULL_TREE));
}
/* Used for FUNC_CANNOT_INLINE, FUNC_EXT_CALLED, FUNC_IS_SYSTEM,
FUNC_NO_GLOBAL_ASG, and FUNC_NO_IND_ASG. */
void
c4x_pr_ignored (cpp_reader *pfile ATTRIBUTE_UNUSED)
{
}
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