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/* Default target hook functions.
Copyright (C) 2003 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. */
/* The migration of target macros to target hooks works as follows:
1. Create a target hook that uses the existing target macros to
implement the same functionality.
2. Convert all the MI files to use the hook instead of the macro.
3. Repeat for a majority of the remaining target macros. This will
take some time.
4. Tell target maintainers to start migrating.
5. Eventually convert the backends to override the hook instead of
defining the macros. This will take some time too.
6. TBD when, poison the macros. Unmigrated targets will break at
this point.
Note that we expect steps 1-3 to be done by the people that
understand what the MI does with each macro, and step 5 to be done
by the target maintainers for their respective targets.
Note that steps 1 and 2 don't have to be done together, but no
target can override the new hook until step 2 is complete for it.
Once the macros are poisoned, we will revert to the old migration
rules - migrate the macro, callers, and targets all at once. This
comment can thus be removed at that point. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "machmode.h"
#include "rtl.h"
#include "tree.h"
#include "expr.h"
#include "toplev.h"
#include "function.h"
#include "target.h"
#include "tm_p.h"
#include "target-def.h"
bool
default_promote_function_args (fntype)
tree fntype ATTRIBUTE_UNUSED;
{
#ifdef PROMOTE_FUNCTION_ARGS
return true;
#else
return false;
#endif
}
bool
default_promote_function_return (fntype)
tree fntype ATTRIBUTE_UNUSED;
{
#ifdef PROMOTE_FUNCTION_RETURN
return true;
#else
return false;
#endif
}
bool
default_promote_prototypes (fntype)
tree fntype ATTRIBUTE_UNUSED;
{
if (PROMOTE_PROTOTYPES)
return true;
else
return false;
}
rtx
default_struct_value_rtx (tree fntype ATTRIBUTE_UNUSED, int incoming)
{
rtx rv = 0;
if (incoming)
{
#ifdef STRUCT_VALUE_INCOMING
rv = STRUCT_VALUE_INCOMING;
#else
#ifdef STRUCT_VALUE_INCOMING_REGNUM
rv = gen_rtx_REG (Pmode, STRUCT_VALUE_INCOMING_REGNUM);
#else
#ifdef STRUCT_VALUE
rv = STRUCT_VALUE;
#else
#ifndef STRUCT_VALUE_REGNUM
abort();
#else
rv = gen_rtx_REG (Pmode, STRUCT_VALUE_REGNUM);
#endif
#endif
#endif
#endif
}
else
{
#ifdef STRUCT_VALUE
rv = STRUCT_VALUE;
#else
#ifndef STRUCT_VALUE_REGNUM
abort();
#else
rv = gen_rtx_REG (Pmode, STRUCT_VALUE_REGNUM);
#endif
#endif
}
return rv;
}
bool
default_return_in_memory (tree type,
tree fntype ATTRIBUTE_UNUSED)
{
#ifndef RETURN_IN_MEMORY
return (TYPE_MODE (type) == BLKmode);
#else
return RETURN_IN_MEMORY (type);
#endif
}
rtx
default_expand_builtin_saveregs (void)
{
#ifdef EXPAND_BUILTIN_SAVEREGS
return EXPAND_BUILTIN_SAVEREGS ();
#else
error ("__builtin_saveregs not supported by this target");
return const0_rtx;
#endif
}
void
default_setup_incoming_varargs (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED,
enum machine_mode mode ATTRIBUTE_UNUSED,
tree type ATTRIBUTE_UNUSED,
int *pretend_arg_size ATTRIBUTE_UNUSED,
int second_time ATTRIBUTE_UNUSED)
{
#ifdef SETUP_INCOMING_VARARGS
SETUP_INCOMING_VARARGS ((*ca), mode, type, (*pretend_arg_size), second_time);
#endif
}
bool
default_strict_argument_naming (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED)
{
#ifdef STRICT_ARGUMENT_NAMING
return STRICT_ARGUMENT_NAMING;
#else
return 0;
#endif
}
bool
default_pretend_outgoing_varargs_named(CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED)
{
#ifdef PRETEND_OUTGOING_VARARGS_NAMED
return PRETEND_OUTGOING_VARARGS_NAMED;
#else
#ifdef SETUP_INCOMING_VARARGS
return 1;
#else
return (targetm.calls.setup_incoming_varargs != default_setup_incoming_varargs);
#endif
#endif
}
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