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git.ipfire.org Git - thirdparty/gcc.git/blob - gcc/gengenrtl.c
1 /* Generate code to allocate RTL structures.
2 Copyright (C) 1997, 1998, 1999, 2000 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 2, 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 COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
33 const char *const enumname
, *const name
, *const format
;
36 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGX(ENUM), NAME, FORMAT },
38 static const struct rtx_definition defs
[] =
40 #include "rtl.def" /* rtl expressions are documented here */
43 static const char *formats
[NUM_RTX_CODE
];
45 static const char *type_from_format
PARAMS ((int));
46 static const char *accessor_from_format
PARAMS ((int));
47 static int special_format
PARAMS ((const char *));
48 static int special_rtx
PARAMS ((int));
49 static void find_formats
PARAMS ((void));
50 static void gendecl
PARAMS ((const char *));
51 static void genmacro
PARAMS ((int));
52 static void gendef
PARAMS ((const char *));
53 static void genlegend
PARAMS ((void));
54 static void genheader
PARAMS ((void));
55 static void gencode
PARAMS ((void));
57 /* Decode a format letter into a C type string. */
69 return "HOST_WIDE_INT ";
72 return "const char *";
80 return "struct bitmap_head_def *"; /* bitmap - typedef not available */
82 return "union tree_node *"; /* tree - typedef not available */
88 /* Decode a format letter into the proper accessor function. */
91 accessor_from_format (c
)
122 /* Return nonzero if we should ignore FMT, an RTL format, when making
123 the list of formats we write routines to create. */
129 return (strchr (fmt
, '*') != 0
130 || strchr (fmt
, 'V') != 0
131 || strchr (fmt
, 'S') != 0
132 || strchr (fmt
, 'n') != 0);
135 /* Return nonzero if the RTL code given by index IDX is one that we should
136 generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO
137 is a wrapper in emit-rtl.c). */
143 return (strcmp (defs
[idx
].enumname
, "CONST_INT") == 0
144 || strcmp (defs
[idx
].enumname
, "REG") == 0
145 || strcmp (defs
[idx
].enumname
, "SUBREG") == 0
146 || strcmp (defs
[idx
].enumname
, "MEM") == 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). */
157 return (strcmp (defs
[idx
].enumname
, "CONST_DOUBLE") == 0);
160 /* Place a list of all format specifiers we use into the array FORMAT. */
167 for (i
= 0; i
< NUM_RTX_CODE
; i
++)
171 if (special_format (defs
[i
].format
))
174 for (f
= formats
; *f
; f
++)
175 if (! strcmp (*f
, defs
[i
].format
))
183 /* Write the declarations for the routine to allocate RTL with FORMAT. */
192 printf ("extern rtx gen_rtx_fmt_%s\tPARAMS ((RTX_CODE, ", format
);
193 printf ("enum machine_mode mode");
195 /* Write each parameter that is needed and start a new line when the line
197 for (p
= format
, i
= 0, pos
= 75; *p
!= 0; p
++)
200 int ourlen
= strlen (type_from_format (*p
)) + 6 + (i
> 9);
203 if (pos
+ ourlen
> 76)
204 printf ("\n\t\t\t\t "), pos
= 39;
206 printf (" %sarg%d", type_from_format (*p
), i
++);
213 /* Generate macros to generate RTL of code IDX using the functions we
223 /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
224 gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
226 if (excluded_rtx (idx
))
227 /* Don't define a macro for this code. */
230 printf ("#define gen_rtx_%s%s(MODE",
231 special_rtx (idx
) ? "raw_" : "", defs
[idx
].enumname
);
233 for (p
= defs
[idx
].format
, i
= 0; *p
!= 0; p
++)
235 printf (", ARG%d", i
++);
237 printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
238 defs
[idx
].format
, defs
[idx
].enumname
);
240 for (p
= defs
[idx
].format
, i
= 0; *p
!= 0; p
++)
242 printf (", (ARG%d)", i
++);
247 /* Generate the code for the function to generate RTL whose
257 /* Start by writing the definition of the function name and the types
260 printf ("rtx\ngen_rtx_fmt_%s (code, mode", format
);
261 for (p
= format
, i
= 0; *p
!= 0; p
++)
263 printf (", arg%d", i
++);
265 puts (")\n RTX_CODE code;\n enum machine_mode mode;");
266 for (p
= format
, i
= 0; *p
!= 0; p
++)
268 printf (" %sarg%d;\n", type_from_format (*p
), i
++);
270 /* Now write out the body of the function itself, which allocates
271 the memory and initializes it. */
274 printf (" rt = ggc_alloc_rtx (%d);\n", (int) strlen (format
));
276 puts (" memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));\n");
277 puts (" PUT_CODE (rt, code);");
278 puts (" PUT_MODE (rt, mode);");
280 for (p
= format
, i
= j
= 0; *p
; ++p
, ++i
)
282 printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p
), i
, j
++);
284 printf (" X0EXP (rt, %d) = NULL_RTX;\n", i
);
286 puts ("\n return rt;\n}\n");
289 /* Generate the documentation header for files we write. */
294 puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
297 /* Generate the text of the header file we make, genrtl.h. */
305 puts ("#ifndef GCC_GENRTL_H");
306 puts ("#define GCC_GENRTL_H\n");
308 for (fmt
= formats
; *fmt
; ++fmt
)
313 for (i
= 0; i
< NUM_RTX_CODE
; i
++)
314 if (! special_format (defs
[i
].format
))
317 puts ("\n#endif /* GCC_GENRTL_H */");
320 /* Generate the text of the code file we write, genrtl.c. */
327 puts ("#include \"config.h\"");
328 puts ("#include \"system.h\"");
329 puts ("#include \"obstack.h\"");
330 puts ("#include \"rtl.h\"");
331 puts ("#include \"ggc.h\"\n");
332 puts ("extern struct obstack *rtl_obstack;\n");
333 puts ("#define obstack_alloc_rtx(n) \\");
334 puts (" ((rtx) obstack_alloc (rtl_obstack, \\");
335 puts (" sizeof (struct rtx_def) \\");
336 puts (" + ((n) - 1) * sizeof (rtunion)))\n");
338 for (fmt
= formats
; *fmt
!= 0; fmt
++)
342 /* This is the main program. We accept only one argument, "-h", which
343 says we are writing the genrtl.h file. Otherwise we are writing the
345 extern int main
PARAMS ((int, char **));
355 if (argc
== 2 && argv
[1][0] == '-' && argv
[1][1] == 'h')
360 if (ferror (stdout
) || fflush (stdout
) || fclose (stdout
))
361 return FATAL_EXIT_CODE
;
363 return SUCCESS_EXIT_CODE
;