1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997-2014 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);
119 /* Return nonzero if the RTL code given by index IDX is one that we should
120 generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
121 is a wrapper in emit-rtl.c). */
124 special_rtx (int idx
)
126 return (strcmp (defs
[idx
].enumname
, "CONST_INT") == 0
127 || strcmp (defs
[idx
].enumname
, "REG") == 0
128 || strcmp (defs
[idx
].enumname
, "SUBREG") == 0
129 || strcmp (defs
[idx
].enumname
, "MEM") == 0
130 || strcmp (defs
[idx
].enumname
, "PC") == 0
131 || strcmp (defs
[idx
].enumname
, "CC0") == 0
132 || strcmp (defs
[idx
].enumname
, "RETURN") == 0
133 || strcmp (defs
[idx
].enumname
, "SIMPLE_RETURN") == 0
134 || strcmp (defs
[idx
].enumname
, "CONST_VECTOR") == 0);
137 /* Return nonzero if the RTL code given by index IDX is one that we should
138 generate no macro for at all (because gen_rtx_FOO is never used or
139 cannot have the obvious interface). */
142 excluded_rtx (int idx
)
144 return ((strcmp (defs
[idx
].enumname
, "CONST_DOUBLE") == 0)
145 || (strcmp (defs
[idx
].enumname
, "CONST_WIDE_INT") == 0)
146 || (strcmp (defs
[idx
].enumname
, "CONST_FIXED") == 0));
149 /* Place a list of all format specifiers we use into the array FORMAT. */
156 for (i
= 0; i
< NUM_RTX_CODE
; i
++)
160 if (special_format (defs
[i
].format
))
163 for (f
= formats
; *f
; f
++)
164 if (! strcmp (*f
, defs
[i
].format
))
173 /* Generate macros to generate RTL of code IDX using the functions we
182 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
183 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
185 if (excluded_rtx (idx
))
186 /* Don't define a macro for this code. */
189 printf ("#define gen_rtx_%s%s(MODE",
190 special_rtx (idx
) ? "raw_" : "", defs
[idx
].enumname
);
192 for (p
= defs
[idx
].format
, i
= 0; *p
!= 0; p
++)
194 printf (", ARG%d", i
++);
196 printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
197 defs
[idx
].format
, defs
[idx
].enumname
);
199 for (p
= defs
[idx
].format
, i
= 0; *p
!= 0; p
++)
201 printf (", (ARG%d)", i
++);
206 /* Generate the code for the function to generate RTL whose
210 gendef (const char *format
)
215 /* Start by writing the definition of the function name and the types
218 printf ("static inline rtx\ngen_rtx_fmt_%s_stat (RTX_CODE code, enum machine_mode mode", format
);
219 for (p
= format
, i
= 0; *p
!= 0; p
++)
221 printf (",\n\t%sarg%d", type_from_format (*p
), i
++);
223 puts (" MEM_STAT_DECL)");
225 /* Now write out the body of the function itself, which allocates
226 the memory and initializes it. */
229 puts (" rt = rtx_alloc_stat (code PASS_MEM_STAT);\n");
231 puts (" PUT_MODE (rt, mode);");
233 for (p
= format
, i
= j
= 0; *p
; ++p
, ++i
)
235 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p
), i
, j
++);
237 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i
);
239 puts ("\n return rt;\n}\n");
240 printf ("#define gen_rtx_fmt_%s(c, m", format
);
241 for (p
= format
, i
= 0; *p
!= 0; p
++)
243 printf (", p%i",i
++);
244 printf (")\\\n gen_rtx_fmt_%s_stat (c, m", format
);
245 for (p
= format
, i
= 0; *p
!= 0; p
++)
247 printf (", p%i",i
++);
248 printf (" MEM_STAT_INFO)\n\n");
251 /* Generate the documentation header for files we write. */
256 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
259 /* Generate the text of the header file we make, genrtl.h. */
267 puts ("#ifndef GCC_GENRTL_H");
268 puts ("#define GCC_GENRTL_H\n");
269 puts ("#include \"statistics.h\"\n");
271 for (fmt
= formats
; *fmt
; ++fmt
)
276 for (i
= 0; i
< NUM_RTX_CODE
; i
++)
277 if (! special_format (defs
[i
].format
))
280 puts ("\n#endif /* GCC_GENRTL_H */");
283 /* This is the main program. */
293 if (ferror (stdout
) || fflush (stdout
) || fclose (stdout
))
294 return FATAL_EXIT_CODE
;
296 return SUCCESS_EXIT_CODE
;