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3b80f6ca | 1 | /* Generate code to allocate RTL structures. |
8f9eb495 | 2 | Copyright (C) 1997, 1998, 1999, 2000, 2002 Free Software Foundation, Inc. |
3b80f6ca | 3 | |
1322177d | 4 | This file is part of GCC. |
3b80f6ca | 5 | |
1322177d LB |
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 | |
9 | version. | |
3b80f6ca | 10 | |
1322177d LB |
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 | |
14 | for more details. | |
3b80f6ca RH |
15 | |
16 | You should have received a copy of the GNU General Public License | |
1322177d LB |
17 | along with GCC; see the file COPYING. If not, write to the Free |
18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
19 | 02111-1307, USA. */ | |
3b80f6ca RH |
20 | |
21 | ||
4977bab6 | 22 | #include "bconfig.h" |
b04cd507 | 23 | #include "system.h" |
4977bab6 ZW |
24 | #include "coretypes.h" |
25 | #include "tm.h" | |
3b80f6ca | 26 | |
3b80f6ca RH |
27 | #define NO_GENRTL_H |
28 | #include "rtl.h" | |
987009bf | 29 | #undef abort |
3b80f6ca | 30 | |
aa0b4465 ZW |
31 | #include "real.h" |
32 | ||
8f9eb495 | 33 | struct rtx_definition |
3b80f6ca | 34 | { |
8b60264b | 35 | const char *const enumname, *const name, *const format; |
3b80f6ca RH |
36 | }; |
37 | ||
4bc5fbd4 | 38 | #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGX(ENUM), NAME, FORMAT }, |
3b80f6ca | 39 | |
8f9eb495 AJ |
40 | static const struct rtx_definition defs[] = |
41 | { | |
3b80f6ca RH |
42 | #include "rtl.def" /* rtl expressions are documented here */ |
43 | }; | |
44 | ||
0b5826ac | 45 | static const char *formats[NUM_RTX_CODE]; |
3b80f6ca | 46 | |
a94ae8f5 KG |
47 | static const char *type_from_format PARAMS ((int)); |
48 | static const char *accessor_from_format PARAMS ((int)); | |
49 | static int special_format PARAMS ((const char *)); | |
50 | static int special_rtx PARAMS ((int)); | |
8f9eb495 | 51 | static int excluded_rtx PARAMS ((int)); |
a94ae8f5 KG |
52 | static void find_formats PARAMS ((void)); |
53 | static void gendecl PARAMS ((const char *)); | |
54 | static void genmacro PARAMS ((int)); | |
55 | static void gendef PARAMS ((const char *)); | |
56 | static void genlegend PARAMS ((void)); | |
57 | static void genheader PARAMS ((void)); | |
58 | static void gencode PARAMS ((void)); | |
c5c76735 | 59 | \f |
0133b7d9 RH |
60 | /* Decode a format letter into a C type string. */ |
61 | ||
3b80f6ca | 62 | static const char * |
982255c8 | 63 | type_from_format (c) |
fd97443c | 64 | int c; |
3b80f6ca RH |
65 | { |
66 | switch (c) | |
67 | { | |
68 | case 'i': | |
c5c76735 JL |
69 | return "int "; |
70 | ||
3b80f6ca | 71 | case 'w': |
c5c76735 JL |
72 | return "HOST_WIDE_INT "; |
73 | ||
3b80f6ca | 74 | case 's': |
3cce094d | 75 | return "const char *"; |
c5c76735 JL |
76 | |
77 | case 'e': case 'u': | |
78 | return "rtx "; | |
79 | ||
3b80f6ca | 80 | case 'E': |
c5c76735 | 81 | return "rtvec "; |
0dfa1860 | 82 | case 'b': |
8f985ec4 | 83 | return "struct bitmap_head_def *"; /* bitmap - typedef not available */ |
0dfa1860 | 84 | case 't': |
8f985ec4 | 85 | return "union tree_node *"; /* tree - typedef not available */ |
c8ea9a0f JH |
86 | case 'B': |
87 | return "struct basic_block_def *"; /* basic block - typedef not available */ | |
3b80f6ca RH |
88 | default: |
89 | abort (); | |
90 | } | |
91 | } | |
92 | ||
0133b7d9 RH |
93 | /* Decode a format letter into the proper accessor function. */ |
94 | ||
3b80f6ca | 95 | static const char * |
982255c8 | 96 | accessor_from_format (c) |
fd97443c | 97 | int c; |
3b80f6ca RH |
98 | { |
99 | switch (c) | |
100 | { | |
101 | case 'i': | |
102 | return "XINT"; | |
c5c76735 | 103 | |
3b80f6ca RH |
104 | case 'w': |
105 | return "XWINT"; | |
c5c76735 | 106 | |
3b80f6ca RH |
107 | case 's': |
108 | return "XSTR"; | |
c5c76735 JL |
109 | |
110 | case 'e': case 'u': | |
3b80f6ca | 111 | return "XEXP"; |
c5c76735 | 112 | |
3b80f6ca RH |
113 | case 'E': |
114 | return "XVEC"; | |
c5c76735 | 115 | |
0dfa1860 MM |
116 | case 'b': |
117 | return "XBITMAP"; | |
c5c76735 | 118 | |
0dfa1860 MM |
119 | case 't': |
120 | return "XTREE"; | |
c5c76735 | 121 | |
c8ea9a0f JH |
122 | case 'B': |
123 | return "XBBDEF"; | |
10d1bb36 JH |
124 | |
125 | default: | |
126 | abort (); | |
3b80f6ca RH |
127 | } |
128 | } | |
129 | ||
c5c76735 JL |
130 | /* Return nonzero if we should ignore FMT, an RTL format, when making |
131 | the list of formats we write routines to create. */ | |
0133b7d9 | 132 | |
3b80f6ca RH |
133 | static int |
134 | special_format (fmt) | |
135 | const char *fmt; | |
136 | { | |
137 | return (strchr (fmt, '*') != 0 | |
138 | || strchr (fmt, 'V') != 0 | |
139 | || strchr (fmt, 'S') != 0 | |
140 | || strchr (fmt, 'n') != 0); | |
141 | } | |
142 | ||
5692c7bc ZW |
143 | /* Return nonzero if the RTL code given by index IDX is one that we should |
144 | generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO | |
145 | is a wrapper in emit-rtl.c). */ | |
0133b7d9 | 146 | |
3b80f6ca RH |
147 | static int |
148 | special_rtx (idx) | |
149 | int idx; | |
150 | { | |
151 | return (strcmp (defs[idx].enumname, "CONST_INT") == 0 | |
41472af8 | 152 | || strcmp (defs[idx].enumname, "REG") == 0 |
ddef6bc7 | 153 | || strcmp (defs[idx].enumname, "SUBREG") == 0 |
a06e3c40 R |
154 | || strcmp (defs[idx].enumname, "MEM") == 0 |
155 | || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0); | |
3b80f6ca RH |
156 | } |
157 | ||
5692c7bc ZW |
158 | /* Return nonzero if the RTL code given by index IDX is one that we should |
159 | generate no macro for at all (because gen_rtx_FOO is never used or | |
160 | cannot have the obvious interface). */ | |
161 | ||
162 | static int | |
163 | excluded_rtx (idx) | |
164 | int idx; | |
165 | { | |
166 | return (strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0); | |
167 | } | |
168 | ||
dc297297 | 169 | /* Place a list of all format specifiers we use into the array FORMAT. */ |
0133b7d9 | 170 | |
3b80f6ca RH |
171 | static void |
172 | find_formats () | |
173 | { | |
174 | int i; | |
175 | ||
c5c76735 | 176 | for (i = 0; i < NUM_RTX_CODE; i++) |
3b80f6ca RH |
177 | { |
178 | const char **f; | |
179 | ||
180 | if (special_format (defs[i].format)) | |
181 | continue; | |
182 | ||
c5c76735 | 183 | for (f = formats; *f; f++) |
0133b7d9 | 184 | if (! strcmp (*f, defs[i].format)) |
3b80f6ca RH |
185 | break; |
186 | ||
c5c76735 | 187 | if (*f == 0) |
3b80f6ca RH |
188 | *f = defs[i].format; |
189 | } | |
190 | } | |
191 | ||
c5c76735 | 192 | /* Write the declarations for the routine to allocate RTL with FORMAT. */ |
0133b7d9 | 193 | |
3b80f6ca | 194 | static void |
c5c76735 | 195 | gendecl (format) |
3b80f6ca RH |
196 | const char *format; |
197 | { | |
198 | const char *p; | |
c5c76735 | 199 | int i, pos; |
8f9eb495 | 200 | |
a94ae8f5 | 201 | printf ("extern rtx gen_rtx_fmt_%s\tPARAMS ((RTX_CODE, ", format); |
c5c76735 JL |
202 | printf ("enum machine_mode mode"); |
203 | ||
204 | /* Write each parameter that is needed and start a new line when the line | |
205 | would overflow. */ | |
206 | for (p = format, i = 0, pos = 75; *p != 0; p++) | |
3b80f6ca | 207 | if (*p != '0') |
c5c76735 JL |
208 | { |
209 | int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9); | |
210 | ||
211 | printf (","); | |
212 | if (pos + ourlen > 76) | |
213 | printf ("\n\t\t\t\t "), pos = 39; | |
214 | ||
215 | printf (" %sarg%d", type_from_format (*p), i++); | |
216 | pos += ourlen; | |
217 | } | |
218 | ||
219 | printf ("));\n"); | |
3b80f6ca RH |
220 | } |
221 | ||
c5c76735 JL |
222 | /* Generate macros to generate RTL of code IDX using the functions we |
223 | write. */ | |
0133b7d9 | 224 | |
8f9eb495 | 225 | static void |
c5c76735 | 226 | genmacro (idx) |
3b80f6ca RH |
227 | int idx; |
228 | { | |
229 | const char *p; | |
230 | int i; | |
231 | ||
c5c76735 JL |
232 | /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to |
233 | gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */ | |
3b80f6ca | 234 | |
5692c7bc ZW |
235 | if (excluded_rtx (idx)) |
236 | /* Don't define a macro for this code. */ | |
237 | return; | |
238 | ||
c5c76735 JL |
239 | printf ("#define gen_rtx_%s%s(MODE", |
240 | special_rtx (idx) ? "raw_" : "", defs[idx].enumname); | |
241 | ||
242 | for (p = defs[idx].format, i = 0; *p != 0; p++) | |
3b80f6ca | 243 | if (*p != '0') |
c5c76735 JL |
244 | printf (", ARG%d", i++); |
245 | ||
246 | printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)", | |
247 | defs[idx].format, defs[idx].enumname); | |
3b80f6ca | 248 | |
c5c76735 | 249 | for (p = defs[idx].format, i = 0; *p != 0; p++) |
3b80f6ca | 250 | if (*p != '0') |
c5c76735 JL |
251 | printf (", (ARG%d)", i++); |
252 | ||
f8a83ee3 | 253 | puts (")"); |
3b80f6ca RH |
254 | } |
255 | ||
c5c76735 JL |
256 | /* Generate the code for the function to generate RTL whose |
257 | format is FORMAT. */ | |
0133b7d9 | 258 | |
3b80f6ca | 259 | static void |
c5c76735 | 260 | gendef (format) |
3b80f6ca RH |
261 | const char *format; |
262 | { | |
263 | const char *p; | |
264 | int i, j; | |
8f9eb495 | 265 | |
c5c76735 JL |
266 | /* Start by writing the definition of the function name and the types |
267 | of the arguments. */ | |
3b80f6ca | 268 | |
c5c76735 JL |
269 | printf ("rtx\ngen_rtx_fmt_%s (code, mode", format); |
270 | for (p = format, i = 0; *p != 0; p++) | |
3b80f6ca | 271 | if (*p != '0') |
c5c76735 | 272 | printf (", arg%d", i++); |
3b80f6ca | 273 | |
f8a83ee3 | 274 | puts (")\n RTX_CODE code;\n enum machine_mode mode;"); |
c5c76735 JL |
275 | for (p = format, i = 0; *p != 0; p++) |
276 | if (*p != '0') | |
277 | printf (" %sarg%d;\n", type_from_format (*p), i++); | |
278 | ||
279 | /* Now write out the body of the function itself, which allocates | |
280 | the memory and initializes it. */ | |
f8a83ee3 ZW |
281 | puts ("{"); |
282 | puts (" rtx rt;"); | |
1f8f4a0b | 283 | printf (" rt = ggc_alloc_rtx (%d);\n", (int) strlen (format)); |
f8a83ee3 ZW |
284 | |
285 | puts (" memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));\n"); | |
286 | puts (" PUT_CODE (rt, code);"); | |
287 | puts (" PUT_MODE (rt, mode);"); | |
3b80f6ca RH |
288 | |
289 | for (p = format, i = j = 0; *p ; ++p, ++i) | |
290 | if (*p != '0') | |
c5c76735 | 291 | printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++); |
f8a83ee3 ZW |
292 | else |
293 | printf (" X0EXP (rt, %d) = NULL_RTX;\n", i); | |
3b80f6ca | 294 | |
f8a83ee3 | 295 | puts ("\n return rt;\n}\n"); |
3b80f6ca RH |
296 | } |
297 | ||
c5c76735 | 298 | /* Generate the documentation header for files we write. */ |
0133b7d9 | 299 | |
3b80f6ca | 300 | static void |
c5c76735 | 301 | genlegend () |
3b80f6ca | 302 | { |
f8a83ee3 | 303 | puts ("/* Generated automatically by gengenrtl from rtl.def. */\n"); |
3b80f6ca RH |
304 | } |
305 | ||
c5c76735 | 306 | /* Generate the text of the header file we make, genrtl.h. */ |
0133b7d9 | 307 | |
3b80f6ca | 308 | static void |
c5c76735 | 309 | genheader () |
3b80f6ca RH |
310 | { |
311 | int i; | |
312 | const char **fmt; | |
0313e85b ZW |
313 | |
314 | puts ("#ifndef GCC_GENRTL_H"); | |
315 | puts ("#define GCC_GENRTL_H\n"); | |
316 | ||
3b80f6ca | 317 | for (fmt = formats; *fmt; ++fmt) |
c5c76735 | 318 | gendecl (*fmt); |
3b80f6ca | 319 | |
f8a83ee3 | 320 | putchar ('\n'); |
3b80f6ca RH |
321 | |
322 | for (i = 0; i < NUM_RTX_CODE; i++) | |
c5c76735 JL |
323 | if (! special_format (defs[i].format)) |
324 | genmacro (i); | |
0313e85b ZW |
325 | |
326 | puts ("\n#endif /* GCC_GENRTL_H */"); | |
3b80f6ca RH |
327 | } |
328 | ||
c5c76735 | 329 | /* Generate the text of the code file we write, genrtl.c. */ |
0133b7d9 | 330 | |
3b80f6ca | 331 | static void |
c5c76735 | 332 | gencode () |
3b80f6ca RH |
333 | { |
334 | const char **fmt; | |
335 | ||
f8a83ee3 ZW |
336 | puts ("#include \"config.h\""); |
337 | puts ("#include \"system.h\""); | |
4977bab6 ZW |
338 | puts ("#include \"coretypes.h\""); |
339 | puts ("#include \"tm.h\""); | |
f8a83ee3 ZW |
340 | puts ("#include \"obstack.h\""); |
341 | puts ("#include \"rtl.h\""); | |
342 | puts ("#include \"ggc.h\"\n"); | |
343 | puts ("extern struct obstack *rtl_obstack;\n"); | |
c5c76735 JL |
344 | |
345 | for (fmt = formats; *fmt != 0; fmt++) | |
346 | gendef (*fmt); | |
3b80f6ca RH |
347 | } |
348 | ||
c5c76735 JL |
349 | /* This is the main program. We accept only one argument, "-h", which |
350 | says we are writing the genrtl.h file. Otherwise we are writing the | |
351 | genrtl.c file. */ | |
a94ae8f5 | 352 | extern int main PARAMS ((int, char **)); |
c5c76735 | 353 | |
3b80f6ca | 354 | int |
c5c76735 | 355 | main (argc, argv) |
3b80f6ca RH |
356 | int argc; |
357 | char **argv; | |
358 | { | |
3b80f6ca | 359 | find_formats (); |
c5c76735 | 360 | genlegend (); |
3b80f6ca | 361 | |
c5c76735 JL |
362 | if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h') |
363 | genheader (); | |
364 | else | |
365 | gencode (); | |
3b80f6ca | 366 | |
0313e85b ZW |
367 | if (ferror (stdout) || fflush (stdout) || fclose (stdout)) |
368 | return FATAL_EXIT_CODE; | |
369 | ||
370 | return SUCCESS_EXIT_CODE; | |
3b80f6ca | 371 | } |