1 /* Default target hook functions.
2 Copyright (C) 2003 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 2, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
21 /* The migration of target macros to target hooks works as follows:
23 1. Create a target hook that uses the existing target macros to
24 implement the same functionality.
26 2. Convert all the MI files to use the hook instead of the macro.
28 3. Repeat for a majority of the remaining target macros. This will
31 4. Tell target maintainers to start migrating.
33 5. Eventually convert the backends to override the hook instead of
34 defining the macros. This will take some time too.
36 6. TBD when, poison the macros. Unmigrated targets will break at
39 Note that we expect steps 1-3 to be done by the people that
40 understand what the MI does with each macro, and step 5 to be done
41 by the target maintainers for their respective targets.
43 Note that steps 1 and 2 don't have to be done together, but no
44 target can override the new hook until step 2 is complete for it.
46 Once the macros are poisoned, we will revert to the old migration
47 rules - migrate the macro, callers, and targets all at once. This
48 comment can thus be removed at that point. */
52 #include "coretypes.h"
62 #include "target-def.h"
65 default_external_libcall (rtx fun ATTRIBUTE_UNUSED)
67 #ifdef ASM_OUTPUT_EXTERNAL_LIBCALL
68 ASM_OUTPUT_EXTERNAL_LIBCALL(asm_out_file, fun);
73 default_promote_function_args (tree fntype ATTRIBUTE_UNUSED)
75 #ifdef PROMOTE_FUNCTION_ARGS
83 default_promote_function_return (tree fntype ATTRIBUTE_UNUSED)
85 #ifdef PROMOTE_FUNCTION_RETURN
93 default_promote_prototypes (tree fntype ATTRIBUTE_UNUSED)
95 if (PROMOTE_PROTOTYPES)
102 default_struct_value_rtx (tree fntype ATTRIBUTE_UNUSED, int incoming)
107 #ifdef STRUCT_VALUE_INCOMING
108 rv = STRUCT_VALUE_INCOMING;
110 #ifdef STRUCT_VALUE_INCOMING_REGNUM
111 rv = gen_rtx_REG (Pmode, STRUCT_VALUE_INCOMING_REGNUM);
116 #ifndef STRUCT_VALUE_REGNUM
119 rv = gen_rtx_REG (Pmode, STRUCT_VALUE_REGNUM);
130 #ifndef STRUCT_VALUE_REGNUM
133 rv = gen_rtx_REG (Pmode, STRUCT_VALUE_REGNUM);
141 default_return_in_memory (tree type,
142 tree fntype ATTRIBUTE_UNUSED)
144 #ifndef RETURN_IN_MEMORY
145 return (TYPE_MODE (type) == BLKmode);
147 return RETURN_IN_MEMORY (type);
152 default_expand_builtin_saveregs (void)
154 #ifdef EXPAND_BUILTIN_SAVEREGS
155 return EXPAND_BUILTIN_SAVEREGS ();
157 error ("__builtin_saveregs not supported by this target");
163 default_setup_incoming_varargs (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED,
164 enum machine_mode mode ATTRIBUTE_UNUSED,
165 tree type ATTRIBUTE_UNUSED,
166 int *pretend_arg_size ATTRIBUTE_UNUSED,
167 int second_time ATTRIBUTE_UNUSED)
169 #ifdef SETUP_INCOMING_VARARGS
170 SETUP_INCOMING_VARARGS ((*ca), mode, type, (*pretend_arg_size), second_time);
175 default_strict_argument_naming (CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED)
177 #ifdef STRICT_ARGUMENT_NAMING
178 return STRICT_ARGUMENT_NAMING;
185 default_pretend_outgoing_varargs_named(CUMULATIVE_ARGS *ca ATTRIBUTE_UNUSED)
187 #ifdef PRETEND_OUTGOING_VARARGS_NAMED
188 return PRETEND_OUTGOING_VARARGS_NAMED;
190 #ifdef SETUP_INCOMING_VARARGS
193 return (targetm.calls.setup_incoming_varargs != default_setup_incoming_varargs);