Mercurial > hg > CbC > CbC_gcc
annotate gcc/genextract.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | 77e2b8dfacca |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Generate code from machine description to extract operands from insn as rtl. |
| 2 Copyright (C) 1987, 1991, 1992, 1993, 1997, 1998, 1999, 2000, 2003, | |
|
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parents:
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changeset
|
3 2004, 2005, 2007, 2008, 2009, 2010 |
| 0 | 4 Free Software Foundation, Inc. |
| 5 | |
| 6 This file is part of GCC. | |
| 7 | |
| 8 GCC is free software; you can redistribute it and/or modify it under | |
| 9 the terms of the GNU General Public License as published by the Free | |
| 10 Software Foundation; either version 3, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with GCC; see the file COPYING3. If not see | |
| 20 <http://www.gnu.org/licenses/>. */ | |
| 21 | |
| 22 | |
| 23 #include "bconfig.h" | |
| 24 #include "system.h" | |
| 25 #include "coretypes.h" | |
| 26 #include "tm.h" | |
| 27 #include "rtl.h" | |
| 28 #include "errors.h" | |
|
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29 #include "read-md.h" |
| 0 | 30 #include "gensupport.h" |
| 31 #include "vec.h" | |
| 32 #include "vecprim.h" | |
| 33 | |
| 34 /* This structure contains all the information needed to describe one | |
| 35 set of extractions methods. Each method may be used by more than | |
| 36 one pattern if the operands are in the same place. | |
| 37 | |
| 38 The string for each operand describes that path to the operand and | |
| 39 contains `0' through `9' when going into an expression and `a' through | |
| 40 `z' when going into a vector. We assume here that only the first operand | |
| 41 of an rtl expression is a vector. genrecog.c makes the same assumption | |
| 42 (and uses the same representation) and it is currently true. */ | |
| 43 | |
| 44 typedef char *locstr; | |
| 45 | |
| 46 struct extraction | |
| 47 { | |
| 48 unsigned int op_count; | |
| 49 unsigned int dup_count; | |
| 50 locstr *oplocs; | |
| 51 locstr *duplocs; | |
| 52 int *dupnums; | |
| 53 struct code_ptr *insns; | |
| 54 struct extraction *next; | |
| 55 }; | |
| 56 | |
| 57 /* Holds a single insn code that uses an extraction method. */ | |
| 58 struct code_ptr | |
| 59 { | |
| 60 int insn_code; | |
| 61 struct code_ptr *next; | |
| 62 }; | |
| 63 | |
| 64 /* All extractions needed for this machine description. */ | |
| 65 static struct extraction *extractions; | |
| 66 | |
| 67 /* All insn codes for old-style peepholes. */ | |
| 68 static struct code_ptr *peepholes; | |
| 69 | |
| 70 /* This structure is used by gen_insn and walk_rtx to accumulate the | |
| 71 data that will be used to produce an extractions structure. */ | |
| 72 | |
| 73 DEF_VEC_P(locstr); | |
| 74 DEF_VEC_ALLOC_P(locstr,heap); | |
| 75 | |
| 76 struct accum_extract | |
| 77 { | |
| 78 VEC(locstr,heap) *oplocs; | |
| 79 VEC(locstr,heap) *duplocs; | |
| 80 VEC(int,heap) *dupnums; | |
| 81 VEC(char,heap) *pathstr; | |
| 82 }; | |
| 83 | |
|
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84 int line_no; |
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85 |
| 0 | 86 /* Forward declarations. */ |
| 87 static void walk_rtx (rtx, struct accum_extract *); | |
| 88 | |
| 89 static void | |
| 90 gen_insn (rtx insn, int insn_code_number) | |
| 91 { | |
| 92 int i; | |
| 93 unsigned int op_count, dup_count, j; | |
| 94 struct extraction *p; | |
| 95 struct code_ptr *link; | |
| 96 struct accum_extract acc; | |
| 97 | |
| 98 acc.oplocs = VEC_alloc (locstr,heap, 10); | |
| 99 acc.duplocs = VEC_alloc (locstr,heap, 10); | |
| 100 acc.dupnums = VEC_alloc (int,heap, 10); | |
| 101 acc.pathstr = VEC_alloc (char,heap, 20); | |
| 102 | |
| 103 /* Walk the insn's pattern, remembering at all times the path | |
| 104 down to the walking point. */ | |
| 105 | |
| 106 if (XVECLEN (insn, 1) == 1) | |
| 107 walk_rtx (XVECEXP (insn, 1, 0), &acc); | |
| 108 else | |
| 109 for (i = XVECLEN (insn, 1) - 1; i >= 0; i--) | |
| 110 { | |
| 111 VEC_safe_push (char,heap, acc.pathstr, 'a' + i); | |
| 112 walk_rtx (XVECEXP (insn, 1, i), &acc); | |
| 113 VEC_pop (char, acc.pathstr); | |
| 114 } | |
| 115 | |
| 116 link = XNEW (struct code_ptr); | |
| 117 link->insn_code = insn_code_number; | |
| 118 | |
| 119 /* See if we find something that already had this extraction method. */ | |
| 120 | |
| 121 op_count = VEC_length (locstr, acc.oplocs); | |
| 122 dup_count = VEC_length (locstr, acc.duplocs); | |
| 123 gcc_assert (dup_count == VEC_length (int, acc.dupnums)); | |
| 124 | |
| 125 for (p = extractions; p; p = p->next) | |
| 126 { | |
| 127 if (p->op_count != op_count || p->dup_count != dup_count) | |
| 128 continue; | |
| 129 | |
| 130 for (j = 0; j < op_count; j++) | |
| 131 { | |
| 132 char *a = p->oplocs[j]; | |
| 133 char *b = VEC_index (locstr, acc.oplocs, j); | |
| 134 if (a != b && (!a || !b || strcmp (a, b))) | |
| 135 break; | |
| 136 } | |
| 137 | |
| 138 if (j != op_count) | |
| 139 continue; | |
| 140 | |
| 141 for (j = 0; j < dup_count; j++) | |
| 142 if (p->dupnums[j] != VEC_index (int, acc.dupnums, j) | |
| 143 || strcmp (p->duplocs[j], VEC_index (locstr, acc.duplocs, j))) | |
| 144 break; | |
| 145 | |
| 146 if (j != dup_count) | |
| 147 continue; | |
| 148 | |
| 149 /* This extraction is the same as ours. Just link us in. */ | |
| 150 link->next = p->insns; | |
| 151 p->insns = link; | |
| 152 goto done; | |
| 153 } | |
| 154 | |
| 155 /* Otherwise, make a new extraction method. We stash the arrays | |
| 156 after the extraction structure in memory. */ | |
| 157 | |
| 158 p = XNEWVAR (struct extraction, sizeof (struct extraction) | |
| 159 + op_count*sizeof (char *) | |
| 160 + dup_count*sizeof (char *) | |
| 161 + dup_count*sizeof (int)); | |
| 162 p->op_count = op_count; | |
| 163 p->dup_count = dup_count; | |
| 164 p->next = extractions; | |
| 165 extractions = p; | |
| 166 p->insns = link; | |
| 167 link->next = 0; | |
| 168 | |
| 169 p->oplocs = (char **)((char *)p + sizeof (struct extraction)); | |
| 170 p->duplocs = p->oplocs + op_count; | |
| 171 p->dupnums = (int *)(p->duplocs + dup_count); | |
| 172 | |
| 173 memcpy(p->oplocs, VEC_address(locstr,acc.oplocs), op_count*sizeof(locstr)); | |
| 174 memcpy(p->duplocs, VEC_address(locstr,acc.duplocs), dup_count*sizeof(locstr)); | |
| 175 memcpy(p->dupnums, VEC_address(int, acc.dupnums), dup_count*sizeof(int)); | |
| 176 | |
| 177 done: | |
| 178 VEC_free (locstr,heap, acc.oplocs); | |
| 179 VEC_free (locstr,heap, acc.duplocs); | |
| 180 VEC_free (int,heap, acc.dupnums); | |
| 181 VEC_free (char,heap, acc.pathstr); | |
| 182 } | |
| 183 | |
| 184 /* Helper subroutine of walk_rtx: given a VEC(locstr), an index, and a | |
| 185 string, insert the string at the index, which should either already | |
| 186 exist and be NULL, or not yet exist within the vector. In the latter | |
| 187 case the vector is enlarged as appropriate. */ | |
| 188 static void | |
| 189 VEC_safe_set_locstr (VEC(locstr,heap) **vp, unsigned int ix, char *str) | |
| 190 { | |
| 191 if (ix < VEC_length (locstr, *vp)) | |
| 192 { | |
|
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193 if (VEC_index (locstr, *vp, ix)) |
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194 { |
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195 message_with_line (line_no, "repeated operand number %d", ix); |
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196 have_error = 1; |
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197 } |
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198 else |
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199 VEC_replace (locstr, *vp, ix, str); |
| 0 | 200 } |
| 201 else | |
| 202 { | |
| 203 while (ix > VEC_length (locstr, *vp)) | |
| 204 VEC_safe_push (locstr, heap, *vp, 0); | |
| 205 VEC_safe_push (locstr, heap, *vp, str); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 /* Another helper subroutine of walk_rtx: given a VEC(char), convert it | |
| 210 to a NUL-terminated string in malloc memory. */ | |
| 211 static char * | |
| 212 VEC_char_to_string (VEC(char,heap) *v) | |
| 213 { | |
| 214 size_t n = VEC_length (char, v); | |
| 215 char *s = XNEWVEC (char, n + 1); | |
| 216 memcpy (s, VEC_address (char, v), n); | |
| 217 s[n] = '\0'; | |
| 218 return s; | |
| 219 } | |
| 220 | |
| 221 static void | |
| 222 walk_rtx (rtx x, struct accum_extract *acc) | |
| 223 { | |
| 224 RTX_CODE code; | |
| 225 int i, len, base; | |
| 226 const char *fmt; | |
| 227 | |
| 228 if (x == 0) | |
| 229 return; | |
| 230 | |
| 231 code = GET_CODE (x); | |
| 232 switch (code) | |
| 233 { | |
| 234 case PC: | |
| 235 case CC0: | |
| 236 case CONST_INT: | |
| 237 case SYMBOL_REF: | |
| 238 return; | |
| 239 | |
| 240 case MATCH_OPERAND: | |
| 241 case MATCH_SCRATCH: | |
| 242 VEC_safe_set_locstr (&acc->oplocs, XINT (x, 0), | |
| 243 VEC_char_to_string (acc->pathstr)); | |
| 244 break; | |
| 245 | |
| 246 case MATCH_OPERATOR: | |
| 247 case MATCH_PARALLEL: | |
| 248 VEC_safe_set_locstr (&acc->oplocs, XINT (x, 0), | |
| 249 VEC_char_to_string (acc->pathstr)); | |
| 250 | |
| 251 base = (code == MATCH_OPERATOR ? '0' : 'a'); | |
| 252 for (i = XVECLEN (x, 2) - 1; i >= 0; i--) | |
| 253 { | |
| 254 VEC_safe_push (char,heap, acc->pathstr, base + i); | |
| 255 walk_rtx (XVECEXP (x, 2, i), acc); | |
| 256 VEC_pop (char, acc->pathstr); | |
| 257 } | |
| 258 return; | |
| 259 | |
| 260 case MATCH_DUP: | |
| 261 case MATCH_PAR_DUP: | |
| 262 case MATCH_OP_DUP: | |
| 263 VEC_safe_push (locstr,heap, acc->duplocs, | |
| 264 VEC_char_to_string (acc->pathstr)); | |
| 265 VEC_safe_push (int,heap, acc->dupnums, XINT (x, 0)); | |
| 266 | |
| 267 if (code == MATCH_DUP) | |
| 268 break; | |
| 269 | |
| 270 base = (code == MATCH_OP_DUP ? '0' : 'a'); | |
| 271 for (i = XVECLEN (x, 1) - 1; i >= 0; i--) | |
| 272 { | |
| 273 VEC_safe_push (char,heap, acc->pathstr, base + i); | |
| 274 walk_rtx (XVECEXP (x, 1, i), acc); | |
| 275 VEC_pop (char, acc->pathstr); | |
| 276 } | |
| 277 return; | |
| 278 | |
| 279 default: | |
| 280 break; | |
| 281 } | |
| 282 | |
| 283 fmt = GET_RTX_FORMAT (code); | |
| 284 len = GET_RTX_LENGTH (code); | |
| 285 for (i = 0; i < len; i++) | |
| 286 { | |
| 287 if (fmt[i] == 'e' || fmt[i] == 'u') | |
| 288 { | |
| 289 VEC_safe_push (char,heap, acc->pathstr, '0' + i); | |
| 290 walk_rtx (XEXP (x, i), acc); | |
| 291 VEC_pop (char, acc->pathstr); | |
| 292 } | |
| 293 else if (fmt[i] == 'E') | |
| 294 { | |
| 295 int j; | |
| 296 for (j = XVECLEN (x, i) - 1; j >= 0; j--) | |
| 297 { | |
| 298 VEC_safe_push (char,heap, acc->pathstr, 'a' + j); | |
| 299 walk_rtx (XVECEXP (x, i, j), acc); | |
| 300 VEC_pop (char, acc->pathstr); | |
| 301 } | |
| 302 } | |
| 303 } | |
| 304 } | |
| 305 | |
| 306 /* Given a PATH, representing a path down the instruction's | |
| 307 pattern from the root to a certain point, output code to | |
| 308 evaluate to the rtx at that point. */ | |
| 309 | |
| 310 static void | |
| 311 print_path (const char *path) | |
| 312 { | |
| 313 int len = strlen (path); | |
| 314 int i; | |
| 315 | |
| 316 if (len == 0) | |
| 317 { | |
| 318 /* Don't emit "pat", since we may try to take the address of it, | |
| 319 which isn't what is intended. */ | |
| 320 fputs ("PATTERN (insn)", stdout); | |
| 321 return; | |
| 322 } | |
| 323 | |
| 324 /* We first write out the operations (XEXP or XVECEXP) in reverse | |
| 325 order, then write "pat", then the indices in forward order. */ | |
| 326 | |
| 327 for (i = len - 1; i >= 0 ; i--) | |
| 328 { | |
| 329 if (ISLOWER (path[i])) | |
| 330 fputs ("XVECEXP (", stdout); | |
| 331 else if (ISDIGIT (path[i])) | |
| 332 fputs ("XEXP (", stdout); | |
| 333 else | |
| 334 gcc_unreachable (); | |
| 335 } | |
| 336 | |
| 337 fputs ("pat", stdout); | |
| 338 | |
| 339 for (i = 0; i < len; i++) | |
| 340 { | |
| 341 if (ISLOWER (path[i])) | |
| 342 printf (", 0, %d)", path[i] - 'a'); | |
| 343 else if (ISDIGIT(path[i])) | |
| 344 printf (", %d)", path[i] - '0'); | |
| 345 else | |
| 346 gcc_unreachable (); | |
| 347 } | |
| 348 } | |
| 349 | |
| 350 static void | |
| 351 print_header (void) | |
| 352 { | |
| 353 /* N.B. Code below avoids putting squiggle braces in column 1 inside | |
| 354 a string, because this confuses some editors' syntax highlighting | |
| 355 engines. */ | |
| 356 | |
| 357 puts ("\ | |
| 358 /* Generated automatically by the program `genextract'\n\ | |
| 359 from the machine description file `md'. */\n\ | |
| 360 \n\ | |
| 361 #include \"config.h\"\n\ | |
| 362 #include \"system.h\"\n\ | |
| 363 #include \"coretypes.h\"\n\ | |
| 364 #include \"tm.h\"\n\ | |
| 365 #include \"rtl.h\"\n\ | |
| 366 #include \"insn-config.h\"\n\ | |
| 367 #include \"recog.h\"\n\ | |
|
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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368 #include \"diagnostic-core.h\"\n\ |
| 0 | 369 \n\ |
| 370 /* This variable is used as the \"location\" of any missing operand\n\ | |
| 371 whose numbers are skipped by a given pattern. */\n\ | |
| 372 static rtx junk ATTRIBUTE_UNUSED;\n"); | |
| 373 | |
| 374 puts ("\ | |
| 375 void\n\ | |
| 376 insn_extract (rtx insn)\n{\n\ | |
| 377 rtx *ro = recog_data.operand;\n\ | |
| 378 rtx **ro_loc = recog_data.operand_loc;\n\ | |
| 379 rtx pat = PATTERN (insn);\n\ | |
| 380 int i ATTRIBUTE_UNUSED; /* only for peepholes */\n\ | |
| 381 \n\ | |
| 382 #ifdef ENABLE_CHECKING\n\ | |
| 383 memset (ro, 0xab, sizeof (*ro) * MAX_RECOG_OPERANDS);\n\ | |
| 384 memset (ro_loc, 0xab, sizeof (*ro_loc) * MAX_RECOG_OPERANDS);\n\ | |
| 385 #endif\n"); | |
| 386 | |
| 387 puts ("\ | |
| 388 switch (INSN_CODE (insn))\n\ | |
| 389 {\n\ | |
| 390 default:\n\ | |
| 391 /* Control reaches here if insn_extract has been called with an\n\ | |
| 392 unrecognizable insn (code -1), or an insn whose INSN_CODE\n\ | |
| 393 corresponds to a DEFINE_EXPAND in the machine description;\n\ | |
| 394 either way, a bug. */\n\ | |
| 395 if (INSN_CODE (insn) < 0)\n\ | |
| 396 fatal_insn (\"unrecognizable insn:\", insn);\n\ | |
| 397 else\n\ | |
| 398 fatal_insn (\"insn with invalid code number:\", insn);\n"); | |
| 399 } | |
| 400 | |
| 401 int | |
| 402 main (int argc, char **argv) | |
| 403 { | |
| 404 rtx desc; | |
| 405 unsigned int i; | |
| 406 struct extraction *p; | |
| 407 struct code_ptr *link; | |
| 408 const char *name; | |
| 409 int insn_code_number; | |
| 410 | |
| 411 progname = "genextract"; | |
| 412 | |
|
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parents:
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diff
changeset
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413 if (!init_rtx_reader_args (argc, argv)) |
| 0 | 414 return (FATAL_EXIT_CODE); |
| 415 | |
| 416 /* Read the machine description. */ | |
| 417 | |
| 418 while ((desc = read_md_rtx (&line_no, &insn_code_number)) != NULL) | |
| 419 { | |
| 420 if (GET_CODE (desc) == DEFINE_INSN) | |
| 421 gen_insn (desc, insn_code_number); | |
| 422 | |
| 423 else if (GET_CODE (desc) == DEFINE_PEEPHOLE) | |
| 424 { | |
| 425 struct code_ptr *link = XNEW (struct code_ptr); | |
| 426 | |
| 427 link->insn_code = insn_code_number; | |
| 428 link->next = peepholes; | |
| 429 peepholes = link; | |
| 430 } | |
| 431 } | |
| 432 | |
|
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433 if (have_error) |
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434 return FATAL_EXIT_CODE; |
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435 |
| 0 | 436 print_header (); |
| 437 | |
| 438 /* Write out code to handle peepholes and the insn_codes that it should | |
| 439 be called for. */ | |
| 440 if (peepholes) | |
| 441 { | |
| 442 for (link = peepholes; link; link = link->next) | |
| 443 printf (" case %d:\n", link->insn_code); | |
| 444 | |
| 445 /* The vector in the insn says how many operands it has. | |
| 446 And all it contains are operands. In fact, the vector was | |
| 447 created just for the sake of this function. We need to set the | |
| 448 location of the operands for sake of simplifications after | |
| 449 extraction, like eliminating subregs. */ | |
| 450 puts (" for (i = XVECLEN (pat, 0) - 1; i >= 0; i--)\n" | |
| 451 " ro[i] = *(ro_loc[i] = &XVECEXP (pat, 0, i));\n" | |
| 452 " break;\n"); | |
| 453 } | |
| 454 | |
| 455 /* Write out all the ways to extract insn operands. */ | |
| 456 for (p = extractions; p; p = p->next) | |
| 457 { | |
| 458 for (link = p->insns; link; link = link->next) | |
| 459 { | |
| 460 i = link->insn_code; | |
| 461 name = get_insn_name (i); | |
| 462 if (name) | |
| 463 printf (" case %d: /* %s */\n", i, name); | |
| 464 else | |
| 465 printf (" case %d:\n", i); | |
| 466 } | |
| 467 | |
| 468 for (i = 0; i < p->op_count; i++) | |
| 469 { | |
| 470 if (p->oplocs[i] == 0) | |
| 471 { | |
| 472 printf (" ro[%d] = const0_rtx;\n", i); | |
| 473 printf (" ro_loc[%d] = &junk;\n", i); | |
| 474 } | |
| 475 else | |
| 476 { | |
| 477 printf (" ro[%d] = *(ro_loc[%d] = &", i, i); | |
| 478 print_path (p->oplocs[i]); | |
| 479 puts (");"); | |
| 480 } | |
| 481 } | |
| 482 | |
| 483 for (i = 0; i < p->dup_count; i++) | |
| 484 { | |
| 485 printf (" recog_data.dup_loc[%d] = &", i); | |
| 486 print_path (p->duplocs[i]); | |
| 487 puts (";"); | |
| 488 printf (" recog_data.dup_num[%d] = %d;\n", i, p->dupnums[i]); | |
| 489 } | |
| 490 | |
| 491 puts (" break;\n"); | |
| 492 } | |
| 493 | |
| 494 puts (" }\n}"); | |
| 495 fflush (stdout); | |
| 496 return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
| 497 } |