Mercurial > hg > CbC > CbC_gcc
annotate gcc/genextract.c @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Generate code from machine description to extract operands from insn as rtl. |
| 145 | 2 Copyright (C) 1987-2020 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 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 | |
| 9 version. | |
| 10 | |
| 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. | |
| 15 | |
| 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/>. */ | |
| 19 | |
| 20 | |
| 21 #include "bconfig.h" | |
| 22 #include "system.h" | |
| 23 #include "coretypes.h" | |
| 24 #include "tm.h" | |
| 25 #include "rtl.h" | |
| 26 #include "errors.h" | |
|
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27 #include "read-md.h" |
| 0 | 28 #include "gensupport.h" |
| 29 | |
| 30 /* This structure contains all the information needed to describe one | |
| 31 set of extractions methods. Each method may be used by more than | |
| 32 one pattern if the operands are in the same place. | |
| 33 | |
| 34 The string for each operand describes that path to the operand and | |
| 35 contains `0' through `9' when going into an expression and `a' through | |
| 131 | 36 `z' then 'A' through to 'Z' when going into a vector. We assume here that |
| 37 only the first operand of an rtl expression is a vector. genrecog.c makes | |
| 38 the same assumption (and uses the same representation) and it is currently | |
| 39 true. */ | |
| 0 | 40 |
| 41 typedef char *locstr; | |
| 42 | |
| 43 struct extraction | |
| 44 { | |
| 45 unsigned int op_count; | |
| 46 unsigned int dup_count; | |
| 47 locstr *oplocs; | |
| 48 locstr *duplocs; | |
| 49 int *dupnums; | |
| 50 struct code_ptr *insns; | |
| 51 struct extraction *next; | |
| 52 }; | |
| 53 | |
| 54 /* Holds a single insn code that uses an extraction method. */ | |
| 55 struct code_ptr | |
| 56 { | |
| 57 int insn_code; | |
| 58 struct code_ptr *next; | |
| 59 }; | |
| 60 | |
| 61 /* All extractions needed for this machine description. */ | |
| 62 static struct extraction *extractions; | |
| 63 | |
| 64 /* All insn codes for old-style peepholes. */ | |
| 65 static struct code_ptr *peepholes; | |
| 66 | |
| 67 /* This structure is used by gen_insn and walk_rtx to accumulate the | |
| 68 data that will be used to produce an extractions structure. */ | |
| 69 | |
| 70 | |
| 145 | 71 class accum_extract |
| 0 | 72 { |
| 145 | 73 public: |
| 111 | 74 accum_extract () : oplocs (10), duplocs (10), dupnums (10), pathstr (20) {} |
| 75 | |
| 76 auto_vec<locstr> oplocs; | |
| 77 auto_vec<locstr> duplocs; | |
| 78 auto_vec<int> dupnums; | |
| 79 auto_vec<char> pathstr; | |
| 0 | 80 }; |
| 81 | |
| 82 /* Forward declarations. */ | |
| 145 | 83 static void walk_rtx (md_rtx_info *, rtx, class accum_extract *); |
| 0 | 84 |
| 131 | 85 #define UPPER_OFFSET ('A' - ('z' - 'a' + 1)) |
| 86 | |
| 87 /* Convert integer OPERAND into a character - either into [a-zA-Z] for vector | |
| 88 operands or [0-9] for integer operands - and push onto the end of the path | |
| 89 in ACC. */ | |
| 90 static void | |
| 91 push_pathstr_operand (int operand, bool is_vector, | |
| 145 | 92 class accum_extract *acc) |
| 131 | 93 { |
| 94 if (is_vector && 'a' + operand > 'z') | |
| 95 acc->pathstr.safe_push (operand + UPPER_OFFSET); | |
| 96 else if (is_vector) | |
| 97 acc->pathstr.safe_push (operand + 'a'); | |
| 98 else | |
| 99 acc->pathstr.safe_push (operand + '0'); | |
| 100 } | |
| 101 | |
| 0 | 102 static void |
| 111 | 103 gen_insn (md_rtx_info *info) |
| 0 | 104 { |
| 105 int i; | |
| 106 unsigned int op_count, dup_count, j; | |
| 107 struct extraction *p; | |
| 108 struct code_ptr *link; | |
| 145 | 109 class accum_extract acc; |
| 0 | 110 |
| 111 /* Walk the insn's pattern, remembering at all times the path | |
| 112 down to the walking point. */ | |
| 113 | |
| 111 | 114 rtx insn = info->def; |
| 0 | 115 if (XVECLEN (insn, 1) == 1) |
| 111 | 116 walk_rtx (info, XVECEXP (insn, 1, 0), &acc); |
| 0 | 117 else |
| 118 for (i = XVECLEN (insn, 1) - 1; i >= 0; i--) | |
| 119 { | |
| 131 | 120 push_pathstr_operand (i, true, &acc); |
| 111 | 121 walk_rtx (info, XVECEXP (insn, 1, i), &acc); |
| 122 acc.pathstr.pop (); | |
| 0 | 123 } |
| 124 | |
| 125 link = XNEW (struct code_ptr); | |
| 111 | 126 link->insn_code = info->index; |
| 0 | 127 |
| 128 /* See if we find something that already had this extraction method. */ | |
| 129 | |
| 111 | 130 op_count = acc.oplocs.length (); |
| 131 dup_count = acc.duplocs.length (); | |
| 132 gcc_assert (dup_count == acc.dupnums.length ()); | |
| 0 | 133 |
| 134 for (p = extractions; p; p = p->next) | |
| 135 { | |
| 136 if (p->op_count != op_count || p->dup_count != dup_count) | |
| 137 continue; | |
| 138 | |
| 139 for (j = 0; j < op_count; j++) | |
| 140 { | |
| 141 char *a = p->oplocs[j]; | |
| 111 | 142 char *b = acc.oplocs[j]; |
| 0 | 143 if (a != b && (!a || !b || strcmp (a, b))) |
| 144 break; | |
| 145 } | |
| 146 | |
| 147 if (j != op_count) | |
| 148 continue; | |
| 149 | |
| 150 for (j = 0; j < dup_count; j++) | |
| 111 | 151 if (p->dupnums[j] != acc.dupnums[j] |
| 152 || strcmp (p->duplocs[j], acc.duplocs[j])) | |
| 0 | 153 break; |
| 154 | |
| 155 if (j != dup_count) | |
| 156 continue; | |
| 157 | |
| 158 /* This extraction is the same as ours. Just link us in. */ | |
| 159 link->next = p->insns; | |
| 160 p->insns = link; | |
| 111 | 161 return; |
| 0 | 162 } |
| 163 | |
| 164 /* Otherwise, make a new extraction method. We stash the arrays | |
| 165 after the extraction structure in memory. */ | |
| 166 | |
| 167 p = XNEWVAR (struct extraction, sizeof (struct extraction) | |
| 168 + op_count*sizeof (char *) | |
| 169 + dup_count*sizeof (char *) | |
| 170 + dup_count*sizeof (int)); | |
| 171 p->op_count = op_count; | |
| 172 p->dup_count = dup_count; | |
| 173 p->next = extractions; | |
| 174 extractions = p; | |
| 175 p->insns = link; | |
| 176 link->next = 0; | |
| 177 | |
| 178 p->oplocs = (char **)((char *)p + sizeof (struct extraction)); | |
| 179 p->duplocs = p->oplocs + op_count; | |
| 180 p->dupnums = (int *)(p->duplocs + dup_count); | |
| 181 | |
| 111 | 182 memcpy (p->oplocs, acc.oplocs.address (), op_count * sizeof (locstr)); |
| 183 memcpy (p->duplocs, acc.duplocs.address (), dup_count * sizeof (locstr)); | |
| 184 memcpy (p->dupnums, acc.dupnums.address (), dup_count * sizeof (int)); | |
| 0 | 185 } |
| 186 | |
| 111 | 187 /* Helper subroutine of walk_rtx: given a vec<locstr>, an index, and a |
| 0 | 188 string, insert the string at the index, which should either already |
| 189 exist and be NULL, or not yet exist within the vector. In the latter | |
| 111 | 190 case the vector is enlarged as appropriate. INFO describes the |
| 191 containing define_* expression. */ | |
| 0 | 192 static void |
| 111 | 193 VEC_safe_set_locstr (md_rtx_info *info, vec<locstr> *vp, |
| 194 unsigned int ix, char *str) | |
| 0 | 195 { |
| 111 | 196 if (ix < (*vp).length ()) |
| 0 | 197 { |
| 111 | 198 if ((*vp)[ix]) |
|
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199 { |
| 111 | 200 message_at (info->loc, "repeated operand number %d", ix); |
|
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201 have_error = 1; |
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202 } |
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203 else |
| 111 | 204 (*vp)[ix] = str; |
| 0 | 205 } |
| 206 else | |
| 207 { | |
| 111 | 208 while (ix > (*vp).length ()) |
| 209 vp->safe_push (NULL); | |
| 210 vp->safe_push (str); | |
| 0 | 211 } |
| 212 } | |
| 213 | |
| 111 | 214 /* Another helper subroutine of walk_rtx: given a vec<char>, convert it |
| 0 | 215 to a NUL-terminated string in malloc memory. */ |
| 216 static char * | |
| 111 | 217 VEC_char_to_string (vec<char> v) |
| 0 | 218 { |
| 111 | 219 size_t n = v.length (); |
| 0 | 220 char *s = XNEWVEC (char, n + 1); |
| 111 | 221 memcpy (s, v.address (), n); |
| 0 | 222 s[n] = '\0'; |
| 223 return s; | |
| 224 } | |
| 225 | |
| 226 static void | |
| 145 | 227 walk_rtx (md_rtx_info *info, rtx x, class accum_extract *acc) |
| 0 | 228 { |
| 229 RTX_CODE code; | |
| 131 | 230 int i, len; |
| 0 | 231 const char *fmt; |
| 232 | |
| 233 if (x == 0) | |
| 234 return; | |
| 235 | |
| 236 code = GET_CODE (x); | |
| 237 switch (code) | |
| 238 { | |
| 239 case PC: | |
| 240 case CC0: | |
| 241 case CONST_INT: | |
| 242 case SYMBOL_REF: | |
| 243 return; | |
| 244 | |
| 245 case MATCH_OPERAND: | |
| 246 case MATCH_SCRATCH: | |
| 111 | 247 VEC_safe_set_locstr (info, &acc->oplocs, XINT (x, 0), |
| 0 | 248 VEC_char_to_string (acc->pathstr)); |
| 249 break; | |
| 250 | |
| 251 case MATCH_OPERATOR: | |
| 252 case MATCH_PARALLEL: | |
| 111 | 253 VEC_safe_set_locstr (info, &acc->oplocs, XINT (x, 0), |
| 0 | 254 VEC_char_to_string (acc->pathstr)); |
| 255 | |
| 256 for (i = XVECLEN (x, 2) - 1; i >= 0; i--) | |
| 257 { | |
| 131 | 258 push_pathstr_operand (i, code != MATCH_OPERATOR, acc); |
| 111 | 259 walk_rtx (info, XVECEXP (x, 2, i), acc); |
| 260 acc->pathstr.pop (); | |
| 0 | 261 } |
| 262 return; | |
| 263 | |
| 264 case MATCH_DUP: | |
| 265 case MATCH_PAR_DUP: | |
| 266 case MATCH_OP_DUP: | |
| 111 | 267 acc->duplocs.safe_push (VEC_char_to_string (acc->pathstr)); |
| 268 acc->dupnums.safe_push (XINT (x, 0)); | |
| 0 | 269 |
| 270 if (code == MATCH_DUP) | |
| 271 break; | |
| 272 | |
| 273 for (i = XVECLEN (x, 1) - 1; i >= 0; i--) | |
| 274 { | |
| 131 | 275 push_pathstr_operand (i, code != MATCH_OP_DUP, acc); |
| 111 | 276 walk_rtx (info, XVECEXP (x, 1, i), acc); |
| 277 acc->pathstr.pop (); | |
| 0 | 278 } |
| 279 return; | |
| 280 | |
| 281 default: | |
| 282 break; | |
| 283 } | |
| 284 | |
| 285 fmt = GET_RTX_FORMAT (code); | |
| 286 len = GET_RTX_LENGTH (code); | |
| 287 for (i = 0; i < len; i++) | |
| 288 { | |
| 289 if (fmt[i] == 'e' || fmt[i] == 'u') | |
| 290 { | |
| 131 | 291 push_pathstr_operand (i, false, acc); |
| 111 | 292 walk_rtx (info, XEXP (x, i), acc); |
| 293 acc->pathstr.pop (); | |
| 0 | 294 } |
| 295 else if (fmt[i] == 'E') | |
| 296 { | |
| 297 int j; | |
| 298 for (j = XVECLEN (x, i) - 1; j >= 0; j--) | |
| 299 { | |
| 131 | 300 push_pathstr_operand (j, true, acc); |
| 111 | 301 walk_rtx (info, XVECEXP (x, i, j), acc); |
| 302 acc->pathstr.pop (); | |
| 0 | 303 } |
| 304 } | |
| 305 } | |
| 306 } | |
| 307 | |
| 308 /* Given a PATH, representing a path down the instruction's | |
| 309 pattern from the root to a certain point, output code to | |
| 310 evaluate to the rtx at that point. */ | |
| 311 | |
| 312 static void | |
| 313 print_path (const char *path) | |
| 314 { | |
| 315 int len = strlen (path); | |
| 316 int i; | |
| 317 | |
| 318 if (len == 0) | |
| 319 { | |
| 320 /* Don't emit "pat", since we may try to take the address of it, | |
| 321 which isn't what is intended. */ | |
| 322 fputs ("PATTERN (insn)", stdout); | |
| 323 return; | |
| 324 } | |
| 325 | |
| 326 /* We first write out the operations (XEXP or XVECEXP) in reverse | |
| 327 order, then write "pat", then the indices in forward order. */ | |
| 328 | |
| 329 for (i = len - 1; i >= 0 ; i--) | |
| 330 { | |
| 131 | 331 if (ISLOWER (path[i]) || ISUPPER (path[i])) |
| 0 | 332 fputs ("XVECEXP (", stdout); |
| 333 else if (ISDIGIT (path[i])) | |
| 334 fputs ("XEXP (", stdout); | |
| 335 else | |
| 336 gcc_unreachable (); | |
| 337 } | |
| 338 | |
| 339 fputs ("pat", stdout); | |
| 340 | |
| 341 for (i = 0; i < len; i++) | |
| 342 { | |
| 131 | 343 if (ISUPPER (path[i])) |
| 344 printf (", 0, %d)", path[i] - UPPER_OFFSET); | |
| 345 else if (ISLOWER (path[i])) | |
| 0 | 346 printf (", 0, %d)", path[i] - 'a'); |
| 111 | 347 else if (ISDIGIT (path[i])) |
| 0 | 348 printf (", %d)", path[i] - '0'); |
| 349 else | |
| 350 gcc_unreachable (); | |
| 351 } | |
| 352 } | |
| 353 | |
| 354 static void | |
| 355 print_header (void) | |
| 356 { | |
| 357 /* N.B. Code below avoids putting squiggle braces in column 1 inside | |
| 358 a string, because this confuses some editors' syntax highlighting | |
| 359 engines. */ | |
| 360 | |
| 361 puts ("\ | |
| 362 /* Generated automatically by the program `genextract'\n\ | |
| 363 from the machine description file `md'. */\n\ | |
| 364 \n\ | |
| 131 | 365 #define IN_TARGET_CODE 1\n\ |
| 0 | 366 #include \"config.h\"\n\ |
| 367 #include \"system.h\"\n\ | |
| 368 #include \"coretypes.h\"\n\ | |
| 369 #include \"tm.h\"\n\ | |
| 370 #include \"rtl.h\"\n\ | |
| 371 #include \"insn-config.h\"\n\ | |
| 372 #include \"recog.h\"\n\ | |
|
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f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
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373 #include \"diagnostic-core.h\"\n\ |
| 0 | 374 \n\ |
| 375 /* This variable is used as the \"location\" of any missing operand\n\ | |
| 376 whose numbers are skipped by a given pattern. */\n\ | |
| 377 static rtx junk ATTRIBUTE_UNUSED;\n"); | |
| 378 | |
| 379 puts ("\ | |
| 380 void\n\ | |
| 111 | 381 insn_extract (rtx_insn *insn)\n{\n\ |
| 0 | 382 rtx *ro = recog_data.operand;\n\ |
| 383 rtx **ro_loc = recog_data.operand_loc;\n\ | |
| 384 rtx pat = PATTERN (insn);\n\ | |
| 385 int i ATTRIBUTE_UNUSED; /* only for peepholes */\n\ | |
| 386 \n\ | |
| 111 | 387 if (flag_checking)\n\ |
| 388 {\n\ | |
| 389 memset (ro, 0xab, sizeof (*ro) * MAX_RECOG_OPERANDS);\n\ | |
| 390 memset (ro_loc, 0xab, sizeof (*ro_loc) * MAX_RECOG_OPERANDS);\n\ | |
| 391 }\n"); | |
| 0 | 392 |
| 393 puts ("\ | |
| 394 switch (INSN_CODE (insn))\n\ | |
| 395 {\n\ | |
| 396 default:\n\ | |
| 397 /* Control reaches here if insn_extract has been called with an\n\ | |
| 398 unrecognizable insn (code -1), or an insn whose INSN_CODE\n\ | |
| 399 corresponds to a DEFINE_EXPAND in the machine description;\n\ | |
| 400 either way, a bug. */\n\ | |
| 401 if (INSN_CODE (insn) < 0)\n\ | |
| 402 fatal_insn (\"unrecognizable insn:\", insn);\n\ | |
| 403 else\n\ | |
| 404 fatal_insn (\"insn with invalid code number:\", insn);\n"); | |
| 405 } | |
| 406 | |
| 407 int | |
| 111 | 408 main (int argc, const char **argv) |
| 0 | 409 { |
| 410 unsigned int i; | |
| 411 struct extraction *p; | |
| 412 struct code_ptr *link; | |
| 413 const char *name; | |
| 414 | |
| 415 progname = "genextract"; | |
| 416 | |
|
67
f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
|
417 if (!init_rtx_reader_args (argc, argv)) |
| 0 | 418 return (FATAL_EXIT_CODE); |
| 419 | |
| 420 /* Read the machine description. */ | |
| 421 | |
| 111 | 422 md_rtx_info info; |
| 423 while (read_md_rtx (&info)) | |
| 424 switch (GET_CODE (info.def)) | |
| 425 { | |
| 426 case DEFINE_INSN: | |
| 427 gen_insn (&info); | |
| 428 break; | |
| 0 | 429 |
| 111 | 430 case DEFINE_PEEPHOLE: |
| 0 | 431 { |
| 432 struct code_ptr *link = XNEW (struct code_ptr); | |
| 433 | |
| 111 | 434 link->insn_code = info.index; |
| 0 | 435 link->next = peepholes; |
| 436 peepholes = link; | |
| 437 } | |
| 111 | 438 break; |
| 439 | |
| 440 default: | |
| 441 break; | |
| 0 | 442 } |
| 443 | |
|
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parents:
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444 if (have_error) |
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445 return FATAL_EXIT_CODE; |
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parents:
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diff
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446 |
| 0 | 447 print_header (); |
| 448 | |
| 449 /* Write out code to handle peepholes and the insn_codes that it should | |
| 450 be called for. */ | |
| 451 if (peepholes) | |
| 452 { | |
| 453 for (link = peepholes; link; link = link->next) | |
| 454 printf (" case %d:\n", link->insn_code); | |
| 455 | |
| 456 /* The vector in the insn says how many operands it has. | |
| 457 And all it contains are operands. In fact, the vector was | |
| 458 created just for the sake of this function. We need to set the | |
| 459 location of the operands for sake of simplifications after | |
| 460 extraction, like eliminating subregs. */ | |
| 461 puts (" for (i = XVECLEN (pat, 0) - 1; i >= 0; i--)\n" | |
| 462 " ro[i] = *(ro_loc[i] = &XVECEXP (pat, 0, i));\n" | |
| 463 " break;\n"); | |
| 464 } | |
| 465 | |
| 466 /* Write out all the ways to extract insn operands. */ | |
| 467 for (p = extractions; p; p = p->next) | |
| 468 { | |
| 469 for (link = p->insns; link; link = link->next) | |
| 470 { | |
| 471 i = link->insn_code; | |
| 472 name = get_insn_name (i); | |
| 473 if (name) | |
| 474 printf (" case %d: /* %s */\n", i, name); | |
| 475 else | |
| 476 printf (" case %d:\n", i); | |
| 477 } | |
| 478 | |
| 479 for (i = 0; i < p->op_count; i++) | |
| 480 { | |
| 481 if (p->oplocs[i] == 0) | |
| 482 { | |
| 483 printf (" ro[%d] = const0_rtx;\n", i); | |
| 484 printf (" ro_loc[%d] = &junk;\n", i); | |
| 485 } | |
| 486 else | |
| 487 { | |
| 488 printf (" ro[%d] = *(ro_loc[%d] = &", i, i); | |
| 489 print_path (p->oplocs[i]); | |
| 490 puts (");"); | |
| 491 } | |
| 492 } | |
| 493 | |
| 494 for (i = 0; i < p->dup_count; i++) | |
| 495 { | |
| 496 printf (" recog_data.dup_loc[%d] = &", i); | |
| 497 print_path (p->duplocs[i]); | |
| 498 puts (";"); | |
| 499 printf (" recog_data.dup_num[%d] = %d;\n", i, p->dupnums[i]); | |
| 500 } | |
| 501 | |
| 502 puts (" break;\n"); | |
| 503 } | |
| 504 | |
| 505 puts (" }\n}"); | |
| 506 fflush (stdout); | |
| 507 return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
| 508 } |