1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997-2017 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 3, 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 COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
26 const char *const enumname
, *const name
, *const format
;
29 /* rtl.def needs CONST_DOUBLE_FORMAT, but we don't care what
30 CONST_DOUBLE_FORMAT is because we're not going to be generating
31 anything for CONST_DOUBLE anyway. */
32 #define CONST_DOUBLE_FORMAT ""
34 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT },
36 static const struct rtx_definition defs
[] =
38 #include "rtl.def" /* rtl expressions are documented here */
40 #define NUM_RTX_CODE ARRAY_SIZE (defs)
42 static const char *formats
[NUM_RTX_CODE
];
44 /* Decode a format letter into a C type string. */
47 type_from_format (int c
)
55 return "HOST_WIDE_INT ";
58 return "const char *";
68 return "basic_block ";
74 /* Decode a format letter into the proper accessor function. */
77 accessor_from_format (int c
)
107 /* Return nonzero if we should ignore FMT, an RTL format, when making
108 the list of formats we write routines to create. */
111 special_format (const char *fmt
)
113 return (strchr (fmt
, '*') != 0
114 || strchr (fmt
, 'V') != 0
115 || strchr (fmt
, 'S') != 0
116 || strchr (fmt
, 'n') != 0
117 || strchr (fmt
, 'r') != 0);
120 /* Return true if CODE always has VOIDmode. */
123 always_void_p (int idx
)
125 return strcmp (defs
[idx
].enumname
, "SET") == 0;
128 /* Return nonzero if the RTL code given by index IDX is one that we should
129 generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
130 is a wrapper in emit-rtl.c). */
133 special_rtx (int idx
)
135 return (strcmp (defs
[idx
].enumname
, "EXPR_LIST") == 0
136 || strcmp (defs
[idx
].enumname
, "INSN_LIST") == 0
137 || strcmp (defs
[idx
].enumname
, "INSN") == 0
138 || strcmp (defs
[idx
].enumname
, "CONST_INT") == 0
139 || strcmp (defs
[idx
].enumname
, "REG") == 0
140 || strcmp (defs
[idx
].enumname
, "SUBREG") == 0
141 || strcmp (defs
[idx
].enumname
, "MEM") == 0
142 || strcmp (defs
[idx
].enumname
, "PC") == 0
143 || strcmp (defs
[idx
].enumname
, "CC0") == 0
144 || strcmp (defs
[idx
].enumname
, "RETURN") == 0
145 || strcmp (defs
[idx
].enumname
, "SIMPLE_RETURN") == 0
146 || strcmp (defs
[idx
].enumname
, "CONST_VECTOR") == 0);
149 /* Return nonzero if the RTL code given by index IDX is one that we should
150 generate no macro for at all (because gen_rtx_FOO is never used or
151 cannot have the obvious interface). */
154 excluded_rtx (int idx
)
156 return (strcmp (defs
[idx
].enumname
, "VAR_LOCATION") == 0
157 || strcmp (defs
[idx
].enumname
, "CONST_DOUBLE") == 0
158 || strcmp (defs
[idx
].enumname
, "CONST_WIDE_INT") == 0
159 || strcmp (defs
[idx
].enumname
, "CONST_FIXED") == 0);
162 /* Place a list of all format specifiers we use into the array FORMAT. */
169 for (i
= 0; i
< NUM_RTX_CODE
; i
++)
173 if (special_format (defs
[i
].format
))
176 for (f
= formats
; *f
; f
++)
177 if (! strcmp (*f
, defs
[i
].format
))
186 /* Generate macros to generate RTL of code IDX using the functions we
193 const char *sep
= "";
196 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
197 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
199 if (excluded_rtx (idx
))
200 /* Don't define a macro for this code. */
203 bool has_mode_p
= !always_void_p (idx
);
204 printf ("#define gen_rtx_%s%s(",
205 special_rtx (idx
) ? "raw_" : "", defs
[idx
].enumname
);
212 for (p
= defs
[idx
].format
, i
= 0; *p
!= 0; p
++)
215 printf ("%sARG%d", sep
, i
++);
219 printf (") \\\n gen_rtx_fmt_%s (%s, %s",
220 defs
[idx
].format
, defs
[idx
].enumname
,
221 has_mode_p
? "(MODE)" : "VOIDmode");
223 for (p
= defs
[idx
].format
, i
= 0; *p
!= 0; p
++)
225 printf (", (ARG%d)", i
++);
230 /* Generate the code for the function to generate RTL whose
234 gendef (const char *format
)
239 /* Start by writing the definition of the function name and the types
242 printf ("static inline rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, machine_mode mode", format
);
243 for (p
= format
, i
= 0; *p
!= 0; p
++)
245 printf (",\n\t%sarg%d", type_from_format (*p
), i
++);
247 puts (" MEM_STAT_DECL)");
249 /* Now write out the body of the function itself, which allocates
250 the memory and initializes it. */
253 puts (" rt = rtx_alloc (code PASS_MEM_STAT);\n");
255 puts (" PUT_MODE_RAW (rt, mode);");
257 for (p
= format
, i
= j
= 0; *p
; ++p
, ++i
)
259 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p
), i
, j
++);
261 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i
);
263 puts ("\n return rt;\n}\n");
264 printf ("#define gen_rtx_fmt_%s(c, m", format
);
265 for (p
= format
, i
= 0; *p
!= 0; p
++)
267 printf (", p%i",i
++);
268 printf (")\\\n gen_rtx_fmt_%s_stat (c, m", format
);
269 for (p
= format
, i
= 0; *p
!= 0; p
++)
271 printf (", p%i",i
++);
272 printf (" MEM_STAT_INFO)\n\n");
275 /* Generate the documentation header for files we write. */
280 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
283 /* Generate the text of the header file we make, genrtl.h. */
291 puts ("#ifndef GCC_GENRTL_H");
292 puts ("#define GCC_GENRTL_H\n");
293 puts ("#include \"statistics.h\"\n");
295 for (fmt
= formats
; *fmt
; ++fmt
)
300 for (i
= 0; i
< NUM_RTX_CODE
; i
++)
301 if (! special_format (defs
[i
].format
))
304 puts ("\n#endif /* GCC_GENRTL_H */");
307 /* This is the main program. */
317 if (ferror (stdout
) || fflush (stdout
) || fclose (stdout
))
318 return FATAL_EXIT_CODE
;
320 return SUCCESS_EXIT_CODE
;