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 Generic backend types and interfaces.
23 * @author Sebastian Hack
26 #ifndef FIRM_BE_MAIN_H
27 #define FIRM_BE_MAIN_H
32 #include "iroptimize.h"
36 ASM_CONSTRAINT_FLAG_NONE = 0,
37 ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER = 1u << 0,
38 ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP = 1u << 1,
39 ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE = 1u << 2,
40 ASM_CONSTRAINT_FLAG_NO_SUPPORT = 1u << 3,
41 ASM_CONSTRAINT_FLAG_MODIFIER_WRITE = 1u << 4,
42 ASM_CONSTRAINT_FLAG_MODIFIER_NO_WRITE = 1u << 5,
43 ASM_CONSTRAINT_FLAG_MODIFIER_READ = 1u << 6,
44 ASM_CONSTRAINT_FLAG_MODIFIER_NO_READ = 1u << 7,
45 ASM_CONSTRAINT_FLAG_MODIFIER_EARLYCLOBBER = 1u << 8,
46 ASM_CONSTRAINT_FLAG_MODIFIER_COMMUTATIVE = 1u << 9,
47 ASM_CONSTRAINT_FLAG_INVALID = 1u << 10
48 } asm_constraint_flags_t;
49 ENUM_BITSET(asm_constraint_flags_t)
52 * Build a Trampoline for the closure.
53 * @param block the block where to build the trampoline
55 * @param trampoline address of a trampoline region
56 * @param env address of the environment
57 * @param callee address of the function to call
59 * @return modified memory
61 typedef ir_node *(create_trampoline_fkt)(ir_node *block, ir_node *mem, ir_node *trampoline, ir_node *env, ir_node *callee);
64 * This structure contains parameters that should be
65 * propagated to the libFirm parameter set.
67 typedef struct backend_params {
68 /** If set, the backend supports inline assembly. */
69 unsigned support_inline_asm:1;
70 /** If set, the backend supports Rotl nodes */
71 unsigned support_rotl:1;
72 /** the backend uses big-endian byte ordering if set, else little endian */
73 unsigned byte_order_big_endian:1;
74 /** whether the architecure can natively handle modulo shift modes.
75 * If this is true, then you can assume that shifting in modes with
76 * module_shift==machine_size (if mode size is <= machine_size) is efficient
78 unsigned modulo_shift_efficient:1;
79 /** whether the architecure can natively handle modulo shift modes.
80 * If this is true, then you can assume that shifting without modulo shift
83 unsigned non_modulo_shift_efficient:1;
85 /** Settings for architecture dependent optimizations. */
86 const ir_settings_arch_dep_t *dep_param;
88 /** Backend settings for if-conversion. */
89 arch_allow_ifconv_func allow_ifconv;
91 /** size of machine words. This is usually the size of the general purpose
92 * integer registers. */
93 unsigned machine_size;
96 * some backends like x87 can only do arithmetic in a specific float
97 * mode (load/store are still done in the "normal" float/double modes).
99 ir_mode *mode_float_arithmetic;
102 * type used for long long or NULL if none available.
104 ir_type *type_long_long;
107 * type used for unsigned long long or NULL if none available
109 ir_type *type_unsigned_long_long;
112 * type used for long double or NULL if none available.
114 ir_type *type_long_double;
116 /** Size of the trampoline code. */
117 unsigned trampoline_size;
119 /** Alignment of the trampoline code. */
120 unsigned trampoline_align;
122 /** If non-zero, build the trampoline. */
123 create_trampoline_fkt *build_trampoline;
125 /** Alignment of stack parameters */
126 unsigned stack_param_align;
130 * Register the Firm backend command line options.
132 FIRM_API void be_opt_register(void);
135 * Parse one backend argument.
137 FIRM_API int be_parse_arg(const char *arg);
140 * Return the backend configuration parameter.
142 * @return libFirm configuration parameters for the selected
145 FIRM_API const backend_params *be_get_backend_param(void);
148 * Lowers current program for the target architecture.
149 * This must be run once before using be_main. The idea here is that the backend
150 * can perform lowerings like doubleword-lowering, ABI adjustments or
151 * implementation of boolean values, if-conversion, with target specific
153 * The resulting graph is still a "normal" firm-graph on which you can and
154 * should perform further architecture-neutral optimisations before be_main.
156 FIRM_API void be_lower_for_target(void);
159 * Creates an ir_prog pass which performs lowerings necessary for the target
160 * architecture. (Calling backend_params->lower_for_target)
162 FIRM_API ir_prog_pass_t *lower_for_target_pass(const char *name);
165 * Main interface to the frontend.
167 FIRM_API void be_main(FILE *output, const char *compilation_unit_name);
170 * parse assembler constraint strings and returns flags (so the frontend knows
171 * which operands are inputs/outputs and whether memory is required)
173 FIRM_API asm_constraint_flags_t be_parse_asm_constraints(const char *constraints);
176 * tests whether a string is a valid clobber in an ASM instruction
178 FIRM_API int be_is_valid_clobber(const char *clobber);