2 * Copyright (C) 1995-2010 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief support functions for calling conventions
23 * @author Matthias Braun
25 #ifndef FIRM_BE_ARM_ARM_CCONV_H
26 #define FIRM_BE_ARM_ARM_CCONV_H
28 #include "firm_types.h"
30 #include "gen_arm_regalloc_if.h"
32 /** information about a single parameter or result */
33 typedef struct reg_or_stackslot_t
35 const arch_register_t *reg0; /**< if != NULL, the first register used for this parameter. */
36 const arch_register_t *reg1; /**< if != NULL, the second register used. */
37 ir_type *type; /**< indicates that an entity of the specific
39 unsigned offset; /**< if transmitted via stack, the offset for this parameter. */
40 ir_entity *entity; /**< entity in frame type */
43 /** The calling convention info for one call site. */
44 typedef struct calling_convention_t
46 reg_or_stackslot_t *parameters; /**< parameter info. */
47 unsigned param_stack_size; /**< needed stack size for parameters */
48 unsigned n_reg_params;
49 reg_or_stackslot_t *results; /**< result info. */
50 } calling_convention_t;
53 * determine how function parameters and return values are passed.
54 * Decides what goes to register or to stack and what stack offsets/
57 calling_convention_t *arm_decide_calling_convention(const ir_graph *irg,
58 ir_type *function_type);
61 * free memory used by a calling_convention_t
63 void arm_free_calling_convention(calling_convention_t *cconv);