2 * Copyright (C) 1995-2008 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 This file contains functions for matching firm graphs for
23 * nodes that can be used as address mode for x86 instructions
24 * @author Matthias Braun
27 #ifndef IA32_ADDRESS_MODE_H
28 #define IA32_ADDRESS_MODE_H
35 * The address mode data: Used to construct (memory) address modes.
37 typedef struct ia32_address_t ia32_address_t;
38 struct ia32_address_t {
39 ir_node *base; /**< The base register (if any) */
40 ir_node *index; /**< The index register (if any). */
41 ir_node *mem; /**< The memory value (if any). */
42 int offset; /**< An integer offset. */
43 int scale; /**< An integer scale. {0,1,2,3} */
44 ir_entity *symconst_ent; /**< A SynConst entity if any. */
45 bool use_frame; /**< Set, if the frame is accessed */
46 bool tls_segment; /**< Set if AM is relative to TLS */
47 ir_entity *frame_entity; /**< The accessed frame entity if any. */
48 bool symconst_sign; /**< The "sign" of the symconst. */
52 * Additional flags for the address mode creation.
54 typedef enum ia32_create_am_flags_t {
55 ia32_create_am_normal = 0, /**< Normal operation. */
56 ia32_create_am_force = 1U << 0, /**< Ignore the marking of node as a
57 non-address-mode node. */
58 ia32_create_am_double_use = 1U << 1 /**< Fold AM, even if the root of
59 address calculation has two users.
60 This is useful for dest AM. */
61 } ia32_create_am_flags_t;
64 * Create an address mode for a given node.
66 void ia32_create_address_mode(ia32_address_t *addr, ir_node *node, ia32_create_am_flags_t);
69 * Mark those nodes of the given graph that cannot be used inside an
70 * address mode because there values must be materialized in registers.
72 void ia32_calculate_non_address_mode_nodes(ir_graph *irg);
75 * Free the non_address_mode information.
77 void ia32_free_non_address_mode_nodes(void);
80 * Tells whether the given node is a non address mode node.
82 int ia32_is_non_address_mode_node(ir_node const *node);
85 * mark a node so it will not be used as part of address modes
87 void ia32_mark_non_am(ir_node *node);