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3b80f6ca | 1 | /* Generate code to allocate RTL structures. |
3d7aafde AJ |
2 | Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003 |
3 | Free Software Foundation, Inc. | |
3b80f6ca | 4 | |
1322177d | 5 | This file is part of GCC. |
3b80f6ca | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
3b80f6ca | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
3b80f6ca RH |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
3b80f6ca RH |
21 | |
22 | ||
4977bab6 | 23 | #include "bconfig.h" |
b04cd507 | 24 | #include "system.h" |
aa0b4465 | 25 | |
8f9eb495 | 26 | struct rtx_definition |
3b80f6ca | 27 | { |
8b60264b | 28 | const char *const enumname, *const name, *const format; |
3b80f6ca RH |
29 | }; |
30 | ||
0974c7d7 ZW |
31 | /* rtl.def needs CONST_DOUBLE_FORMAT, but we don't care what |
32 | CONST_DOUBLE_FORMAT is because we're not going to be generating | |
33 | anything for CONST_DOUBLE anyway. */ | |
34 | #define CONST_DOUBLE_FORMAT "" | |
35 | ||
9a238586 | 36 | #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { #ENUM, NAME, FORMAT }, |
3b80f6ca | 37 | |
8f9eb495 AJ |
38 | static const struct rtx_definition defs[] = |
39 | { | |
3b80f6ca RH |
40 | #include "rtl.def" /* rtl expressions are documented here */ |
41 | }; | |
0974c7d7 | 42 | #define NUM_RTX_CODE ARRAY_SIZE(defs) |
3b80f6ca | 43 | |
0b5826ac | 44 | static const char *formats[NUM_RTX_CODE]; |
3b80f6ca | 45 | |
3d7aafde AJ |
46 | static const char *type_from_format (int); |
47 | static const char *accessor_from_format (int); | |
48 | static int special_format (const char *); | |
49 | static int special_rtx (int); | |
50 | static int excluded_rtx (int); | |
51 | static void find_formats (void); | |
52 | static void gendecl (const char *); | |
53 | static void genmacro (int); | |
54 | static void gendef (const char *); | |
55 | static void genlegend (void); | |
56 | static void genheader (void); | |
57 | static void gencode (void); | |
c5c76735 | 58 | \f |
0133b7d9 RH |
59 | /* Decode a format letter into a C type string. */ |
60 | ||
3b80f6ca | 61 | static const char * |
3d7aafde | 62 | type_from_format (int c) |
3b80f6ca RH |
63 | { |
64 | switch (c) | |
65 | { | |
66 | case 'i': | |
c5c76735 JL |
67 | return "int "; |
68 | ||
3b80f6ca | 69 | case 'w': |
c5c76735 JL |
70 | return "HOST_WIDE_INT "; |
71 | ||
3b80f6ca | 72 | case 's': |
3cce094d | 73 | return "const char *"; |
c5c76735 JL |
74 | |
75 | case 'e': case 'u': | |
76 | return "rtx "; | |
77 | ||
3b80f6ca | 78 | case 'E': |
c5c76735 | 79 | return "rtvec "; |
0dfa1860 | 80 | case 'b': |
8f985ec4 | 81 | return "struct bitmap_head_def *"; /* bitmap - typedef not available */ |
0dfa1860 | 82 | case 't': |
8f985ec4 | 83 | return "union tree_node *"; /* tree - typedef not available */ |
c8ea9a0f JH |
84 | case 'B': |
85 | return "struct basic_block_def *"; /* basic block - typedef not available */ | |
3b80f6ca RH |
86 | default: |
87 | abort (); | |
88 | } | |
89 | } | |
90 | ||
0133b7d9 RH |
91 | /* Decode a format letter into the proper accessor function. */ |
92 | ||
3b80f6ca | 93 | static const char * |
3d7aafde | 94 | accessor_from_format (int c) |
3b80f6ca RH |
95 | { |
96 | switch (c) | |
97 | { | |
98 | case 'i': | |
99 | return "XINT"; | |
c5c76735 | 100 | |
3b80f6ca RH |
101 | case 'w': |
102 | return "XWINT"; | |
c5c76735 | 103 | |
3b80f6ca RH |
104 | case 's': |
105 | return "XSTR"; | |
c5c76735 JL |
106 | |
107 | case 'e': case 'u': | |
3b80f6ca | 108 | return "XEXP"; |
c5c76735 | 109 | |
3b80f6ca RH |
110 | case 'E': |
111 | return "XVEC"; | |
c5c76735 | 112 | |
0dfa1860 MM |
113 | case 'b': |
114 | return "XBITMAP"; | |
c5c76735 | 115 | |
0dfa1860 MM |
116 | case 't': |
117 | return "XTREE"; | |
c5c76735 | 118 | |
c8ea9a0f JH |
119 | case 'B': |
120 | return "XBBDEF"; | |
10d1bb36 JH |
121 | |
122 | default: | |
123 | abort (); | |
3b80f6ca RH |
124 | } |
125 | } | |
126 | ||
c5c76735 JL |
127 | /* Return nonzero if we should ignore FMT, an RTL format, when making |
128 | the list of formats we write routines to create. */ | |
0133b7d9 | 129 | |
3b80f6ca | 130 | static int |
3d7aafde | 131 | special_format (const char *fmt) |
3b80f6ca RH |
132 | { |
133 | return (strchr (fmt, '*') != 0 | |
134 | || strchr (fmt, 'V') != 0 | |
135 | || strchr (fmt, 'S') != 0 | |
136 | || strchr (fmt, 'n') != 0); | |
137 | } | |
138 | ||
5692c7bc ZW |
139 | /* Return nonzero if the RTL code given by index IDX is one that we should |
140 | generate a gen_rtx_raw_FOO macro for, not gen_rtx_FOO (because gen_rtx_FOO | |
141 | is a wrapper in emit-rtl.c). */ | |
0133b7d9 | 142 | |
3b80f6ca | 143 | static int |
3d7aafde | 144 | special_rtx (int idx) |
3b80f6ca RH |
145 | { |
146 | return (strcmp (defs[idx].enumname, "CONST_INT") == 0 | |
41472af8 | 147 | || strcmp (defs[idx].enumname, "REG") == 0 |
ddef6bc7 | 148 | || strcmp (defs[idx].enumname, "SUBREG") == 0 |
a06e3c40 R |
149 | || strcmp (defs[idx].enumname, "MEM") == 0 |
150 | || strcmp (defs[idx].enumname, "CONST_VECTOR") == 0); | |
3b80f6ca RH |
151 | } |
152 | ||
5692c7bc ZW |
153 | /* Return nonzero if the RTL code given by index IDX is one that we should |
154 | generate no macro for at all (because gen_rtx_FOO is never used or | |
155 | cannot have the obvious interface). */ | |
156 | ||
157 | static int | |
3d7aafde | 158 | excluded_rtx (int idx) |
5692c7bc ZW |
159 | { |
160 | return (strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0); | |
161 | } | |
162 | ||
dc297297 | 163 | /* Place a list of all format specifiers we use into the array FORMAT. */ |
0133b7d9 | 164 | |
3b80f6ca | 165 | static void |
3d7aafde | 166 | find_formats (void) |
3b80f6ca RH |
167 | { |
168 | int i; | |
169 | ||
0974c7d7 | 170 | for (i = 0; i < (int)NUM_RTX_CODE; i++) |
3b80f6ca RH |
171 | { |
172 | const char **f; | |
173 | ||
174 | if (special_format (defs[i].format)) | |
175 | continue; | |
176 | ||
c5c76735 | 177 | for (f = formats; *f; f++) |
0133b7d9 | 178 | if (! strcmp (*f, defs[i].format)) |
3b80f6ca RH |
179 | break; |
180 | ||
c5c76735 | 181 | if (*f == 0) |
3b80f6ca RH |
182 | *f = defs[i].format; |
183 | } | |
184 | } | |
185 | ||
c5c76735 | 186 | /* Write the declarations for the routine to allocate RTL with FORMAT. */ |
0133b7d9 | 187 | |
3b80f6ca | 188 | static void |
3d7aafde | 189 | gendecl (const char *format) |
3b80f6ca RH |
190 | { |
191 | const char *p; | |
c5c76735 | 192 | int i, pos; |
8f9eb495 | 193 | |
3d7aafde | 194 | printf ("extern rtx gen_rtx_fmt_%s\t (RTX_CODE, ", format); |
c5c76735 JL |
195 | printf ("enum machine_mode mode"); |
196 | ||
197 | /* Write each parameter that is needed and start a new line when the line | |
198 | would overflow. */ | |
199 | for (p = format, i = 0, pos = 75; *p != 0; p++) | |
3b80f6ca | 200 | if (*p != '0') |
c5c76735 JL |
201 | { |
202 | int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9); | |
203 | ||
204 | printf (","); | |
205 | if (pos + ourlen > 76) | |
206 | printf ("\n\t\t\t\t "), pos = 39; | |
207 | ||
208 | printf (" %sarg%d", type_from_format (*p), i++); | |
209 | pos += ourlen; | |
210 | } | |
211 | ||
3d7aafde | 212 | printf (");\n"); |
3b80f6ca RH |
213 | } |
214 | ||
c5c76735 JL |
215 | /* Generate macros to generate RTL of code IDX using the functions we |
216 | write. */ | |
0133b7d9 | 217 | |
8f9eb495 | 218 | static void |
3d7aafde | 219 | genmacro (int idx) |
3b80f6ca RH |
220 | { |
221 | const char *p; | |
222 | int i; | |
223 | ||
c5c76735 JL |
224 | /* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to |
225 | gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */ | |
3b80f6ca | 226 | |
5692c7bc ZW |
227 | if (excluded_rtx (idx)) |
228 | /* Don't define a macro for this code. */ | |
229 | return; | |
230 | ||
c5c76735 JL |
231 | printf ("#define gen_rtx_%s%s(MODE", |
232 | special_rtx (idx) ? "raw_" : "", defs[idx].enumname); | |
233 | ||
234 | for (p = defs[idx].format, i = 0; *p != 0; p++) | |
3b80f6ca | 235 | if (*p != '0') |
c5c76735 JL |
236 | printf (", ARG%d", i++); |
237 | ||
238 | printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)", | |
239 | defs[idx].format, defs[idx].enumname); | |
3b80f6ca | 240 | |
c5c76735 | 241 | for (p = defs[idx].format, i = 0; *p != 0; p++) |
3b80f6ca | 242 | if (*p != '0') |
c5c76735 JL |
243 | printf (", (ARG%d)", i++); |
244 | ||
f8a83ee3 | 245 | puts (")"); |
3b80f6ca RH |
246 | } |
247 | ||
c5c76735 JL |
248 | /* Generate the code for the function to generate RTL whose |
249 | format is FORMAT. */ | |
0133b7d9 | 250 | |
3b80f6ca | 251 | static void |
3d7aafde | 252 | gendef (const char *format) |
3b80f6ca RH |
253 | { |
254 | const char *p; | |
255 | int i, j; | |
8f9eb495 | 256 | |
c5c76735 JL |
257 | /* Start by writing the definition of the function name and the types |
258 | of the arguments. */ | |
3b80f6ca | 259 | |
6906ba40 | 260 | printf ("rtx\ngen_rtx_fmt_%s (RTX_CODE code, enum machine_mode mode", format); |
c5c76735 | 261 | for (p = format, i = 0; *p != 0; p++) |
3b80f6ca | 262 | if (*p != '0') |
6906ba40 | 263 | printf (",\n\t%sarg%d", type_from_format (*p), i++); |
3b80f6ca | 264 | |
6906ba40 | 265 | puts (")"); |
c5c76735 JL |
266 | |
267 | /* Now write out the body of the function itself, which allocates | |
268 | the memory and initializes it. */ | |
f8a83ee3 ZW |
269 | puts ("{"); |
270 | puts (" rtx rt;"); | |
1f8f4a0b | 271 | printf (" rt = ggc_alloc_rtx (%d);\n", (int) strlen (format)); |
f8a83ee3 ZW |
272 | |
273 | puts (" memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));\n"); | |
274 | puts (" PUT_CODE (rt, code);"); | |
275 | puts (" PUT_MODE (rt, mode);"); | |
3b80f6ca RH |
276 | |
277 | for (p = format, i = j = 0; *p ; ++p, ++i) | |
278 | if (*p != '0') | |
c5c76735 | 279 | printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++); |
f8a83ee3 ZW |
280 | else |
281 | printf (" X0EXP (rt, %d) = NULL_RTX;\n", i); | |
3b80f6ca | 282 | |
f8a83ee3 | 283 | puts ("\n return rt;\n}\n"); |
3b80f6ca RH |
284 | } |
285 | ||
c5c76735 | 286 | /* Generate the documentation header for files we write. */ |
0133b7d9 | 287 | |
3b80f6ca | 288 | static void |
3d7aafde | 289 | genlegend (void) |
3b80f6ca | 290 | { |
f8a83ee3 | 291 | puts ("/* Generated automatically by gengenrtl from rtl.def. */\n"); |
3b80f6ca RH |
292 | } |
293 | ||
c5c76735 | 294 | /* Generate the text of the header file we make, genrtl.h. */ |
0133b7d9 | 295 | |
3b80f6ca | 296 | static void |
3d7aafde | 297 | genheader (void) |
3b80f6ca RH |
298 | { |
299 | int i; | |
300 | const char **fmt; | |
0313e85b ZW |
301 | |
302 | puts ("#ifndef GCC_GENRTL_H"); | |
303 | puts ("#define GCC_GENRTL_H\n"); | |
304 | ||
3b80f6ca | 305 | for (fmt = formats; *fmt; ++fmt) |
c5c76735 | 306 | gendecl (*fmt); |
3b80f6ca | 307 | |
f8a83ee3 | 308 | putchar ('\n'); |
3b80f6ca | 309 | |
0974c7d7 | 310 | for (i = 0; i < (int) NUM_RTX_CODE; i++) |
c5c76735 JL |
311 | if (! special_format (defs[i].format)) |
312 | genmacro (i); | |
0313e85b ZW |
313 | |
314 | puts ("\n#endif /* GCC_GENRTL_H */"); | |
3b80f6ca RH |
315 | } |
316 | ||
c5c76735 | 317 | /* Generate the text of the code file we write, genrtl.c. */ |
0133b7d9 | 318 | |
3b80f6ca | 319 | static void |
3d7aafde | 320 | gencode (void) |
3b80f6ca RH |
321 | { |
322 | const char **fmt; | |
323 | ||
f8a83ee3 ZW |
324 | puts ("#include \"config.h\""); |
325 | puts ("#include \"system.h\""); | |
4977bab6 ZW |
326 | puts ("#include \"coretypes.h\""); |
327 | puts ("#include \"tm.h\""); | |
f8a83ee3 ZW |
328 | puts ("#include \"obstack.h\""); |
329 | puts ("#include \"rtl.h\""); | |
330 | puts ("#include \"ggc.h\"\n"); | |
c5c76735 JL |
331 | |
332 | for (fmt = formats; *fmt != 0; fmt++) | |
333 | gendef (*fmt); | |
3b80f6ca RH |
334 | } |
335 | ||
c5c76735 JL |
336 | /* This is the main program. We accept only one argument, "-h", which |
337 | says we are writing the genrtl.h file. Otherwise we are writing the | |
338 | genrtl.c file. */ | |
339 | ||
3b80f6ca | 340 | int |
3d7aafde | 341 | main (int argc, char **argv) |
3b80f6ca | 342 | { |
3b80f6ca | 343 | find_formats (); |
c5c76735 | 344 | genlegend (); |
3b80f6ca | 345 | |
c5c76735 JL |
346 | if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h') |
347 | genheader (); | |
348 | else | |
349 | gencode (); | |
3b80f6ca | 350 | |
0313e85b ZW |
351 | if (ferror (stdout) || fflush (stdout) || fclose (stdout)) |
352 | return FATAL_EXIT_CODE; | |
353 | ||
354 | return SUCCESS_EXIT_CODE; | |
3b80f6ca | 355 | } |