Mercurial > hg > CbC > CbC_gcc
annotate gcc/genemit.c @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Generate code from machine description to emit insns as rtl. |
| 2 Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000, 2001, | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
3 2003, 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc. |
| 0 | 4 |
| 5 This file is part of GCC. | |
| 6 | |
| 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 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 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. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 | |
| 22 #include "bconfig.h" | |
| 23 #include "system.h" | |
| 24 #include "coretypes.h" | |
| 25 #include "tm.h" | |
| 26 #include "rtl.h" | |
| 27 #include "errors.h" | |
| 28 #include "gensupport.h" | |
| 29 | |
| 30 | |
| 31 static int max_opno; | |
| 32 static int max_dup_opno; | |
| 33 static int max_scratch_opno; | |
| 34 static int insn_code_number; | |
| 35 static int insn_index_number; | |
| 36 | |
| 37 /* Data structure for recording the patterns of insns that have CLOBBERs. | |
| 38 We use this to output a function that adds these CLOBBERs to a | |
| 39 previously-allocated PARALLEL expression. */ | |
| 40 | |
| 41 struct clobber_pat | |
| 42 { | |
| 43 struct clobber_ent *insns; | |
| 44 rtx pattern; | |
| 45 int first_clobber; | |
| 46 struct clobber_pat *next; | |
| 47 int has_hard_reg; | |
| 48 } *clobber_list; | |
| 49 | |
| 50 /* Records one insn that uses the clobber list. */ | |
| 51 | |
| 52 struct clobber_ent | |
| 53 { | |
| 54 int code_number; /* Counts only insns. */ | |
| 55 struct clobber_ent *next; | |
| 56 }; | |
| 57 | |
| 58 static void max_operand_1 (rtx); | |
| 59 static int max_operand_vec (rtx, int); | |
| 60 static void print_code (RTX_CODE); | |
| 61 static void gen_exp (rtx, enum rtx_code, char *); | |
| 62 static void gen_insn (rtx, int); | |
| 63 static void gen_expand (rtx); | |
| 64 static void gen_split (rtx); | |
| 65 static void output_add_clobbers (void); | |
| 66 static void output_added_clobbers_hard_reg_p (void); | |
| 67 static void gen_rtx_scratch (rtx, enum rtx_code); | |
| 68 static void output_peephole2_scratches (rtx); | |
| 69 | |
| 70 | |
| 71 static void | |
| 72 max_operand_1 (rtx x) | |
| 73 { | |
| 74 RTX_CODE code; | |
| 75 int i; | |
| 76 int len; | |
| 77 const char *fmt; | |
| 78 | |
| 79 if (x == 0) | |
| 80 return; | |
| 81 | |
| 82 code = GET_CODE (x); | |
| 83 | |
| 84 if (code == MATCH_OPERAND || code == MATCH_OPERATOR | |
| 85 || code == MATCH_PARALLEL) | |
| 86 max_opno = MAX (max_opno, XINT (x, 0)); | |
| 87 if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP) | |
| 88 max_dup_opno = MAX (max_dup_opno, XINT (x, 0)); | |
| 89 if (code == MATCH_SCRATCH) | |
| 90 max_scratch_opno = MAX (max_scratch_opno, XINT (x, 0)); | |
| 91 | |
| 92 fmt = GET_RTX_FORMAT (code); | |
| 93 len = GET_RTX_LENGTH (code); | |
| 94 for (i = 0; i < len; i++) | |
| 95 { | |
| 96 if (fmt[i] == 'e' || fmt[i] == 'u') | |
| 97 max_operand_1 (XEXP (x, i)); | |
| 98 else if (fmt[i] == 'E') | |
| 99 { | |
| 100 int j; | |
| 101 for (j = 0; j < XVECLEN (x, i); j++) | |
| 102 max_operand_1 (XVECEXP (x, i, j)); | |
| 103 } | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 static int | |
| 108 max_operand_vec (rtx insn, int arg) | |
| 109 { | |
| 110 int len = XVECLEN (insn, arg); | |
| 111 int i; | |
| 112 | |
| 113 max_opno = -1; | |
| 114 max_dup_opno = -1; | |
| 115 max_scratch_opno = -1; | |
| 116 | |
| 117 for (i = 0; i < len; i++) | |
| 118 max_operand_1 (XVECEXP (insn, arg, i)); | |
| 119 | |
| 120 return max_opno + 1; | |
| 121 } | |
| 122 | |
| 123 static void | |
| 124 print_code (RTX_CODE code) | |
| 125 { | |
| 126 const char *p1; | |
| 127 for (p1 = GET_RTX_NAME (code); *p1; p1++) | |
| 128 putchar (TOUPPER(*p1)); | |
| 129 } | |
| 130 | |
| 131 static void | |
| 132 gen_rtx_scratch (rtx x, enum rtx_code subroutine_type) | |
| 133 { | |
| 134 if (subroutine_type == DEFINE_PEEPHOLE2) | |
| 135 { | |
| 136 printf ("operand%d", XINT (x, 0)); | |
| 137 } | |
| 138 else | |
| 139 { | |
| 140 printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 /* Print a C expression to construct an RTX just like X, | |
| 145 substituting any operand references appearing within. */ | |
| 146 | |
| 147 static void | |
| 148 gen_exp (rtx x, enum rtx_code subroutine_type, char *used) | |
| 149 { | |
| 150 RTX_CODE code; | |
| 151 int i; | |
| 152 int len; | |
| 153 const char *fmt; | |
| 154 | |
| 155 if (x == 0) | |
| 156 { | |
| 157 printf ("NULL_RTX"); | |
| 158 return; | |
| 159 } | |
| 160 | |
| 161 code = GET_CODE (x); | |
| 162 | |
| 163 switch (code) | |
| 164 { | |
| 165 case MATCH_OPERAND: | |
| 166 case MATCH_DUP: | |
| 167 if (used) | |
| 168 { | |
| 169 if (used[XINT (x, 0)]) | |
| 170 { | |
| 171 printf ("copy_rtx (operand%d)", XINT (x, 0)); | |
| 172 return; | |
| 173 } | |
| 174 used[XINT (x, 0)] = 1; | |
| 175 } | |
| 176 printf ("operand%d", XINT (x, 0)); | |
| 177 return; | |
| 178 | |
| 179 case MATCH_OP_DUP: | |
| 180 printf ("gen_rtx_fmt_"); | |
| 181 for (i = 0; i < XVECLEN (x, 1); i++) | |
| 182 printf ("e"); | |
| 183 printf (" (GET_CODE (operand%d), ", XINT (x, 0)); | |
| 184 if (GET_MODE (x) == VOIDmode) | |
| 185 printf ("GET_MODE (operand%d)", XINT (x, 0)); | |
| 186 else | |
| 187 printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
| 188 for (i = 0; i < XVECLEN (x, 1); i++) | |
| 189 { | |
| 190 printf (",\n\t\t"); | |
| 191 gen_exp (XVECEXP (x, 1, i), subroutine_type, used); | |
| 192 } | |
| 193 printf (")"); | |
| 194 return; | |
| 195 | |
| 196 case MATCH_OPERATOR: | |
| 197 printf ("gen_rtx_fmt_"); | |
| 198 for (i = 0; i < XVECLEN (x, 2); i++) | |
| 199 printf ("e"); | |
| 200 printf (" (GET_CODE (operand%d)", XINT (x, 0)); | |
| 201 printf (", %smode", GET_MODE_NAME (GET_MODE (x))); | |
| 202 for (i = 0; i < XVECLEN (x, 2); i++) | |
| 203 { | |
| 204 printf (",\n\t\t"); | |
| 205 gen_exp (XVECEXP (x, 2, i), subroutine_type, used); | |
| 206 } | |
| 207 printf (")"); | |
| 208 return; | |
| 209 | |
| 210 case MATCH_PARALLEL: | |
| 211 case MATCH_PAR_DUP: | |
| 212 printf ("operand%d", XINT (x, 0)); | |
| 213 return; | |
| 214 | |
| 215 case MATCH_SCRATCH: | |
| 216 gen_rtx_scratch (x, subroutine_type); | |
| 217 return; | |
| 218 | |
| 219 case ADDRESS: | |
| 220 fatal ("ADDRESS expression code used in named instruction pattern"); | |
| 221 | |
| 222 case PC: | |
| 223 printf ("pc_rtx"); | |
| 224 return; | |
| 225 case CLOBBER: | |
| 226 if (REG_P (XEXP (x, 0))) | |
| 227 { | |
| 228 printf ("gen_hard_reg_clobber (%smode, %i)", GET_MODE_NAME (GET_MODE (XEXP (x, 0))), | |
| 229 REGNO (XEXP (x, 0))); | |
| 230 return; | |
| 231 } | |
| 232 break; | |
| 233 | |
| 234 case CC0: | |
| 235 printf ("cc0_rtx"); | |
| 236 return; | |
| 237 | |
| 238 case CONST_INT: | |
| 239 if (INTVAL (x) == 0) | |
| 240 printf ("const0_rtx"); | |
| 241 else if (INTVAL (x) == 1) | |
| 242 printf ("const1_rtx"); | |
| 243 else if (INTVAL (x) == -1) | |
| 244 printf ("constm1_rtx"); | |
| 245 else if (-MAX_SAVED_CONST_INT <= INTVAL (x) | |
| 246 && INTVAL (x) <= MAX_SAVED_CONST_INT) | |
| 247 printf ("const_int_rtx[MAX_SAVED_CONST_INT + (%d)]", | |
| 248 (int) INTVAL (x)); | |
| 249 else if (INTVAL (x) == STORE_FLAG_VALUE) | |
| 250 printf ("const_true_rtx"); | |
| 251 else | |
| 252 { | |
| 253 printf ("GEN_INT ("); | |
| 254 printf (HOST_WIDE_INT_PRINT_DEC_C, INTVAL (x)); | |
| 255 printf (")"); | |
| 256 } | |
| 257 return; | |
| 258 | |
| 259 case CONST_DOUBLE: | |
| 260 case CONST_FIXED: | |
| 261 /* These shouldn't be written in MD files. Instead, the appropriate | |
| 262 routines in varasm.c should be called. */ | |
| 263 gcc_unreachable (); | |
| 264 | |
| 265 default: | |
| 266 break; | |
| 267 } | |
| 268 | |
| 269 printf ("gen_rtx_"); | |
| 270 print_code (code); | |
| 271 printf (" (%smode", GET_MODE_NAME (GET_MODE (x))); | |
| 272 | |
| 273 fmt = GET_RTX_FORMAT (code); | |
| 274 len = GET_RTX_LENGTH (code); | |
| 275 for (i = 0; i < len; i++) | |
| 276 { | |
| 277 if (fmt[i] == '0') | |
| 278 break; | |
| 279 printf (",\n\t"); | |
| 280 switch (fmt[i]) | |
| 281 { | |
| 282 case 'e': case 'u': | |
| 283 gen_exp (XEXP (x, i), subroutine_type, used); | |
| 284 break; | |
| 285 | |
| 286 case 'i': | |
| 287 printf ("%u", XINT (x, i)); | |
| 288 break; | |
| 289 | |
| 290 case 's': | |
| 291 printf ("\"%s\"", XSTR (x, i)); | |
| 292 break; | |
| 293 | |
| 294 case 'E': | |
| 295 { | |
| 296 int j; | |
| 297 printf ("gen_rtvec (%d", XVECLEN (x, i)); | |
| 298 for (j = 0; j < XVECLEN (x, i); j++) | |
| 299 { | |
| 300 printf (",\n\t\t"); | |
| 301 gen_exp (XVECEXP (x, i, j), subroutine_type, used); | |
| 302 } | |
| 303 printf (")"); | |
| 304 break; | |
| 305 } | |
| 306 | |
| 307 default: | |
| 308 gcc_unreachable (); | |
| 309 } | |
| 310 } | |
| 311 printf (")"); | |
| 312 } | |
| 313 | |
| 314 /* Generate the `gen_...' function for a DEFINE_INSN. */ | |
| 315 | |
| 316 static void | |
| 317 gen_insn (rtx insn, int lineno) | |
| 318 { | |
| 319 int operands; | |
| 320 int i; | |
| 321 | |
| 322 /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) | |
| 323 registers or MATCH_SCRATCHes. If so, store away the information for | |
| 324 later. */ | |
| 325 | |
| 326 if (XVEC (insn, 1)) | |
| 327 { | |
| 328 int has_hard_reg = 0; | |
| 329 | |
| 330 for (i = XVECLEN (insn, 1) - 1; i > 0; i--) | |
| 331 { | |
| 332 if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER) | |
| 333 break; | |
| 334 | |
| 335 if (REG_P (XEXP (XVECEXP (insn, 1, i), 0))) | |
| 336 has_hard_reg = 1; | |
| 337 else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH) | |
| 338 break; | |
| 339 } | |
| 340 | |
| 341 if (i != XVECLEN (insn, 1) - 1) | |
| 342 { | |
| 343 struct clobber_pat *p; | |
| 344 struct clobber_ent *link = XNEW (struct clobber_ent); | |
| 345 int j; | |
| 346 | |
| 347 link->code_number = insn_code_number; | |
| 348 | |
| 349 /* See if any previous CLOBBER_LIST entry is the same as this | |
| 350 one. */ | |
| 351 | |
| 352 for (p = clobber_list; p; p = p->next) | |
| 353 { | |
| 354 if (p->first_clobber != i + 1 | |
| 355 || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) | |
| 356 continue; | |
| 357 | |
| 358 for (j = i + 1; j < XVECLEN (insn, 1); j++) | |
| 359 { | |
| 360 rtx old_rtx = XEXP (XVECEXP (p->pattern, 1, j), 0); | |
| 361 rtx new_rtx = XEXP (XVECEXP (insn, 1, j), 0); | |
| 362 | |
| 363 /* OLD and NEW_INSN are the same if both are to be a SCRATCH | |
| 364 of the same mode, | |
| 365 or if both are registers of the same mode and number. */ | |
| 366 if (! (GET_MODE (old_rtx) == GET_MODE (new_rtx) | |
| 367 && ((GET_CODE (old_rtx) == MATCH_SCRATCH | |
| 368 && GET_CODE (new_rtx) == MATCH_SCRATCH) | |
| 369 || (REG_P (old_rtx) && REG_P (new_rtx) | |
| 370 && REGNO (old_rtx) == REGNO (new_rtx))))) | |
| 371 break; | |
| 372 } | |
| 373 | |
| 374 if (j == XVECLEN (insn, 1)) | |
| 375 break; | |
| 376 } | |
| 377 | |
| 378 if (p == 0) | |
| 379 { | |
| 380 p = XNEW (struct clobber_pat); | |
| 381 | |
| 382 p->insns = 0; | |
| 383 p->pattern = insn; | |
| 384 p->first_clobber = i + 1; | |
| 385 p->next = clobber_list; | |
| 386 p->has_hard_reg = has_hard_reg; | |
| 387 clobber_list = p; | |
| 388 } | |
| 389 | |
| 390 link->next = p->insns; | |
| 391 p->insns = link; | |
| 392 } | |
| 393 } | |
| 394 | |
| 395 /* Don't mention instructions whose names are the null string | |
| 396 or begin with '*'. They are in the machine description just | |
| 397 to be recognized. */ | |
| 398 if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') | |
| 399 return; | |
| 400 | |
| 401 printf ("/* %s:%d */\n", read_rtx_filename, lineno); | |
| 402 | |
| 403 /* Find out how many operands this function has. */ | |
| 404 operands = max_operand_vec (insn, 1); | |
| 405 if (max_dup_opno >= operands) | |
| 406 fatal ("match_dup operand number has no match_operand"); | |
| 407 | |
| 408 /* Output the function name and argument declarations. */ | |
| 409 printf ("rtx\ngen_%s (", XSTR (insn, 0)); | |
| 410 if (operands) | |
| 411 for (i = 0; i < operands; i++) | |
| 412 if (i) | |
| 413 printf (",\n\trtx operand%d ATTRIBUTE_UNUSED", i); | |
| 414 else | |
| 415 printf ("rtx operand%d ATTRIBUTE_UNUSED", i); | |
| 416 else | |
| 417 printf ("void"); | |
| 418 printf (")\n"); | |
| 419 printf ("{\n"); | |
| 420 | |
| 421 /* Output code to construct and return the rtl for the instruction body. */ | |
| 422 | |
| 423 if (XVECLEN (insn, 1) == 1) | |
| 424 { | |
| 425 printf (" return "); | |
| 426 gen_exp (XVECEXP (insn, 1, 0), DEFINE_INSN, NULL); | |
| 427 printf (";\n}\n\n"); | |
| 428 } | |
| 429 else | |
| 430 { | |
| 431 char *used = XCNEWVEC (char, operands); | |
| 432 | |
| 433 printf (" return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (%d", | |
| 434 XVECLEN (insn, 1)); | |
| 435 | |
| 436 for (i = 0; i < XVECLEN (insn, 1); i++) | |
| 437 { | |
| 438 printf (",\n\t\t"); | |
| 439 gen_exp (XVECEXP (insn, 1, i), DEFINE_INSN, used); | |
| 440 } | |
| 441 printf ("));\n}\n\n"); | |
| 442 XDELETEVEC (used); | |
| 443 } | |
| 444 } | |
| 445 | |
| 446 /* Generate the `gen_...' function for a DEFINE_EXPAND. */ | |
| 447 | |
| 448 static void | |
| 449 gen_expand (rtx expand) | |
| 450 { | |
| 451 int operands; | |
| 452 int i; | |
| 453 char *used; | |
| 454 | |
| 455 if (strlen (XSTR (expand, 0)) == 0) | |
| 456 fatal ("define_expand lacks a name"); | |
| 457 if (XVEC (expand, 1) == 0) | |
| 458 fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0)); | |
| 459 | |
| 460 /* Find out how many operands this function has. */ | |
| 461 operands = max_operand_vec (expand, 1); | |
| 462 | |
| 463 /* Output the function name and argument declarations. */ | |
| 464 printf ("rtx\ngen_%s (", XSTR (expand, 0)); | |
| 465 if (operands) | |
| 466 for (i = 0; i < operands; i++) | |
| 467 if (i) | |
| 468 printf (",\n\trtx operand%d", i); | |
| 469 else | |
| 470 printf ("rtx operand%d", i); | |
| 471 else | |
| 472 printf ("void"); | |
| 473 printf (")\n"); | |
| 474 printf ("{\n"); | |
| 475 | |
| 476 /* If we don't have any C code to write, only one insn is being written, | |
| 477 and no MATCH_DUPs are present, we can just return the desired insn | |
| 478 like we do for a DEFINE_INSN. This saves memory. */ | |
| 479 if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') | |
| 480 && operands > max_dup_opno | |
| 481 && XVECLEN (expand, 1) == 1) | |
| 482 { | |
| 483 printf (" return "); | |
| 484 gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL); | |
| 485 printf (";\n}\n\n"); | |
| 486 return; | |
| 487 } | |
| 488 | |
| 489 /* For each operand referred to only with MATCH_DUPs, | |
| 490 make a local variable. */ | |
| 491 for (i = operands; i <= max_dup_opno; i++) | |
| 492 printf (" rtx operand%d;\n", i); | |
| 493 for (; i <= max_scratch_opno; i++) | |
| 494 printf (" rtx operand%d ATTRIBUTE_UNUSED;\n", i); | |
| 495 printf (" rtx _val = 0;\n"); | |
| 496 printf (" start_sequence ();\n"); | |
| 497 | |
| 498 /* The fourth operand of DEFINE_EXPAND is some code to be executed | |
| 499 before the actual construction. | |
| 500 This code expects to refer to `operands' | |
| 501 just as the output-code in a DEFINE_INSN does, | |
| 502 but here `operands' is an automatic array. | |
| 503 So copy the operand values there before executing it. */ | |
| 504 if (XSTR (expand, 3) && *XSTR (expand, 3)) | |
| 505 { | |
| 506 printf (" {\n"); | |
| 507 if (operands > 0 || max_dup_opno >= 0 || max_scratch_opno >= 0) | |
| 508 printf (" rtx operands[%d];\n", | |
| 509 MAX (operands, MAX (max_scratch_opno, max_dup_opno) + 1)); | |
| 510 /* Output code to copy the arguments into `operands'. */ | |
| 511 for (i = 0; i < operands; i++) | |
| 512 printf (" operands[%d] = operand%d;\n", i, i); | |
| 513 | |
| 514 /* Output the special code to be executed before the sequence | |
| 515 is generated. */ | |
| 516 print_rtx_ptr_loc (XSTR (expand, 3)); | |
| 517 printf ("%s\n", XSTR (expand, 3)); | |
| 518 | |
| 519 /* Output code to copy the arguments back out of `operands' | |
| 520 (unless we aren't going to use them at all). */ | |
| 521 if (XVEC (expand, 1) != 0) | |
| 522 { | |
| 523 for (i = 0; i < operands; i++) | |
| 524 printf (" operand%d = operands[%d];\n", i, i); | |
| 525 for (; i <= max_dup_opno; i++) | |
| 526 printf (" operand%d = operands[%d];\n", i, i); | |
| 527 for (; i <= max_scratch_opno; i++) | |
| 528 printf (" operand%d = operands[%d];\n", i, i); | |
| 529 } | |
| 530 printf (" }\n"); | |
| 531 } | |
| 532 | |
| 533 /* Output code to construct the rtl for the instruction bodies. | |
| 534 Use emit_insn to add them to the sequence being accumulated. | |
| 535 But don't do this if the user's code has set `no_more' nonzero. */ | |
| 536 | |
| 537 used = XCNEWVEC (char, | |
| 538 MAX (operands, MAX (max_scratch_opno, max_dup_opno) + 1)); | |
| 539 | |
| 540 for (i = 0; i < XVECLEN (expand, 1); i++) | |
| 541 { | |
| 542 rtx next = XVECEXP (expand, 1, i); | |
| 543 if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
| 544 || (GET_CODE (next) == PARALLEL | |
| 545 && ((GET_CODE (XVECEXP (next, 0, 0)) == SET | |
| 546 && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
| 547 || GET_CODE (XVECEXP (next, 0, 0)) == RETURN)) | |
| 548 || GET_CODE (next) == RETURN) | |
| 549 printf (" emit_jump_insn ("); | |
| 550 else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
| 551 || GET_CODE (next) == CALL | |
| 552 || (GET_CODE (next) == PARALLEL | |
| 553 && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
| 554 && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
| 555 || (GET_CODE (next) == PARALLEL | |
| 556 && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
| 557 printf (" emit_call_insn ("); | |
| 558 else if (LABEL_P (next)) | |
| 559 printf (" emit_label ("); | |
| 560 else if (GET_CODE (next) == MATCH_OPERAND | |
| 561 || GET_CODE (next) == MATCH_DUP | |
| 562 || GET_CODE (next) == MATCH_OPERATOR | |
| 563 || GET_CODE (next) == MATCH_OP_DUP | |
| 564 || GET_CODE (next) == MATCH_PARALLEL | |
| 565 || GET_CODE (next) == MATCH_PAR_DUP | |
| 566 || GET_CODE (next) == PARALLEL) | |
| 567 printf (" emit ("); | |
| 568 else | |
| 569 printf (" emit_insn ("); | |
| 570 gen_exp (next, DEFINE_EXPAND, used); | |
| 571 printf (");\n"); | |
| 572 if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
| 573 && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
| 574 printf (" emit_barrier ();"); | |
| 575 } | |
| 576 | |
| 577 XDELETEVEC (used); | |
| 578 | |
| 579 /* Call `get_insns' to extract the list of all the | |
| 580 insns emitted within this gen_... function. */ | |
| 581 | |
| 582 printf (" _val = get_insns ();\n"); | |
| 583 printf (" end_sequence ();\n"); | |
| 584 printf (" return _val;\n}\n\n"); | |
| 585 } | |
| 586 | |
| 587 /* Like gen_expand, but generates insns resulting from splitting SPLIT. */ | |
| 588 | |
| 589 static void | |
| 590 gen_split (rtx split) | |
| 591 { | |
| 592 int i; | |
| 593 int operands; | |
| 594 const char *const name = | |
| 595 ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split"); | |
| 596 const char *unused; | |
| 597 char *used; | |
| 598 | |
| 599 if (XVEC (split, 0) == 0) | |
| 600 fatal ("define_%s (definition %d) lacks a pattern", name, | |
| 601 insn_index_number); | |
| 602 else if (XVEC (split, 2) == 0) | |
| 603 fatal ("define_%s (definition %d) lacks a replacement pattern", name, | |
| 604 insn_index_number); | |
| 605 | |
| 606 /* Find out how many operands this function has. */ | |
| 607 | |
| 608 max_operand_vec (split, 2); | |
| 609 operands = MAX (max_opno, MAX (max_dup_opno, max_scratch_opno)) + 1; | |
| 610 unused = (operands == 0 ? " ATTRIBUTE_UNUSED" : ""); | |
| 611 used = XCNEWVEC (char, operands); | |
| 612 | |
| 613 /* Output the prototype, function name and argument declarations. */ | |
| 614 if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
| 615 { | |
| 616 printf ("extern rtx gen_%s_%d (rtx, rtx *);\n", | |
| 617 name, insn_code_number); | |
| 618 printf ("rtx\ngen_%s_%d (rtx curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", | |
| 619 name, insn_code_number, unused); | |
| 620 } | |
| 621 else | |
| 622 { | |
| 623 printf ("extern rtx gen_split_%d (rtx, rtx *);\n", insn_code_number); | |
| 624 printf ("rtx\ngen_split_%d (rtx curr_insn ATTRIBUTE_UNUSED, rtx *operands%s)\n", | |
| 625 insn_code_number, unused); | |
| 626 } | |
| 627 printf ("{\n"); | |
| 628 | |
| 629 /* Declare all local variables. */ | |
| 630 for (i = 0; i < operands; i++) | |
| 631 printf (" rtx operand%d;\n", i); | |
| 632 printf (" rtx _val = 0;\n"); | |
| 633 | |
| 634 if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
| 635 output_peephole2_scratches (split); | |
| 636 | |
| 637 printf (" start_sequence ();\n"); | |
| 638 | |
| 639 /* The fourth operand of DEFINE_SPLIT is some code to be executed | |
| 640 before the actual construction. */ | |
| 641 | |
| 642 if (XSTR (split, 3)) | |
| 643 { | |
| 644 print_rtx_ptr_loc (XSTR (split, 3)); | |
| 645 printf ("%s\n", XSTR (split, 3)); | |
| 646 } | |
| 647 | |
| 648 /* Output code to copy the arguments back out of `operands' */ | |
| 649 for (i = 0; i < operands; i++) | |
| 650 printf (" operand%d = operands[%d];\n", i, i); | |
| 651 | |
| 652 /* Output code to construct the rtl for the instruction bodies. | |
| 653 Use emit_insn to add them to the sequence being accumulated. | |
| 654 But don't do this if the user's code has set `no_more' nonzero. */ | |
| 655 | |
| 656 for (i = 0; i < XVECLEN (split, 2); i++) | |
| 657 { | |
| 658 rtx next = XVECEXP (split, 2, i); | |
| 659 if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
| 660 || (GET_CODE (next) == PARALLEL | |
| 661 && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
| 662 && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
| 663 || GET_CODE (next) == RETURN) | |
| 664 printf (" emit_jump_insn ("); | |
| 665 else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
| 666 || GET_CODE (next) == CALL | |
| 667 || (GET_CODE (next) == PARALLEL | |
| 668 && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
| 669 && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
| 670 || (GET_CODE (next) == PARALLEL | |
| 671 && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
| 672 printf (" emit_call_insn ("); | |
| 673 else if (LABEL_P (next)) | |
| 674 printf (" emit_label ("); | |
| 675 else if (GET_CODE (next) == MATCH_OPERAND | |
| 676 || GET_CODE (next) == MATCH_OPERATOR | |
| 677 || GET_CODE (next) == MATCH_PARALLEL | |
| 678 || GET_CODE (next) == MATCH_OP_DUP | |
| 679 || GET_CODE (next) == MATCH_DUP | |
| 680 || GET_CODE (next) == PARALLEL) | |
| 681 printf (" emit ("); | |
| 682 else | |
| 683 printf (" emit_insn ("); | |
| 684 gen_exp (next, GET_CODE (split), used); | |
| 685 printf (");\n"); | |
| 686 if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
| 687 && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
| 688 printf (" emit_barrier ();"); | |
| 689 } | |
| 690 | |
| 691 /* Call `get_insns' to make a list of all the | |
| 692 insns emitted within this gen_... function. */ | |
| 693 | |
| 694 printf (" _val = get_insns ();\n"); | |
| 695 printf (" end_sequence ();\n"); | |
| 696 printf (" return _val;\n}\n\n"); | |
| 697 | |
| 698 free (used); | |
| 699 } | |
| 700 | |
| 701 /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient | |
| 702 size for the insn and an INSN_CODE, and inserts the required CLOBBERs at | |
| 703 the end of the vector. */ | |
| 704 | |
| 705 static void | |
| 706 output_add_clobbers (void) | |
| 707 { | |
| 708 struct clobber_pat *clobber; | |
| 709 struct clobber_ent *ent; | |
| 710 int i; | |
| 711 | |
| 712 printf ("\n\nvoid\nadd_clobbers (rtx pattern ATTRIBUTE_UNUSED, int insn_code_number)\n"); | |
| 713 printf ("{\n"); | |
| 714 printf (" switch (insn_code_number)\n"); | |
| 715 printf (" {\n"); | |
| 716 | |
| 717 for (clobber = clobber_list; clobber; clobber = clobber->next) | |
| 718 { | |
| 719 for (ent = clobber->insns; ent; ent = ent->next) | |
| 720 printf (" case %d:\n", ent->code_number); | |
| 721 | |
| 722 for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) | |
| 723 { | |
| 724 printf (" XVECEXP (pattern, 0, %d) = ", i); | |
| 725 gen_exp (XVECEXP (clobber->pattern, 1, i), | |
| 726 GET_CODE (clobber->pattern), NULL); | |
| 727 printf (";\n"); | |
| 728 } | |
| 729 | |
| 730 printf (" break;\n\n"); | |
| 731 } | |
| 732 | |
| 733 printf (" default:\n"); | |
| 734 printf (" gcc_unreachable ();\n"); | |
| 735 printf (" }\n"); | |
| 736 printf ("}\n"); | |
| 737 } | |
| 738 | |
| 739 /* Write a function, `added_clobbers_hard_reg_p' that is given an insn_code | |
| 740 number that will have clobbers added (as indicated by `recog') and returns | |
| 741 1 if those include a clobber of a hard reg or 0 if all of them just clobber | |
| 742 SCRATCH. */ | |
| 743 | |
| 744 static void | |
| 745 output_added_clobbers_hard_reg_p (void) | |
| 746 { | |
| 747 struct clobber_pat *clobber; | |
| 748 struct clobber_ent *ent; | |
| 749 int clobber_p, used; | |
| 750 | |
| 751 printf ("\n\nint\nadded_clobbers_hard_reg_p (int insn_code_number)\n"); | |
| 752 printf ("{\n"); | |
| 753 printf (" switch (insn_code_number)\n"); | |
| 754 printf (" {\n"); | |
| 755 | |
| 756 for (clobber_p = 0; clobber_p <= 1; clobber_p++) | |
| 757 { | |
| 758 used = 0; | |
| 759 for (clobber = clobber_list; clobber; clobber = clobber->next) | |
| 760 if (clobber->has_hard_reg == clobber_p) | |
| 761 for (ent = clobber->insns; ent; ent = ent->next) | |
| 762 { | |
| 763 printf (" case %d:\n", ent->code_number); | |
| 764 used++; | |
| 765 } | |
| 766 | |
| 767 if (used) | |
| 768 printf (" return %d;\n\n", clobber_p); | |
| 769 } | |
| 770 | |
| 771 printf (" default:\n"); | |
| 772 printf (" gcc_unreachable ();\n"); | |
| 773 printf (" }\n"); | |
| 774 printf ("}\n"); | |
| 775 } | |
| 776 | |
| 777 /* Generate code to invoke find_free_register () as needed for the | |
| 778 scratch registers used by the peephole2 pattern in SPLIT. */ | |
| 779 | |
| 780 static void | |
| 781 output_peephole2_scratches (rtx split) | |
| 782 { | |
| 783 int i; | |
| 784 int insn_nr = 0; | |
|
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785 bool first = true; |
| 0 | 786 |
| 787 for (i = 0; i < XVECLEN (split, 0); i++) | |
| 788 { | |
| 789 rtx elt = XVECEXP (split, 0, i); | |
| 790 if (GET_CODE (elt) == MATCH_SCRATCH) | |
| 791 { | |
| 792 int last_insn_nr = insn_nr; | |
| 793 int cur_insn_nr = insn_nr; | |
| 794 int j; | |
| 795 for (j = i + 1; j < XVECLEN (split, 0); j++) | |
| 796 if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP) | |
| 797 { | |
| 798 if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0)) | |
| 799 last_insn_nr = cur_insn_nr; | |
| 800 } | |
| 801 else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH) | |
| 802 cur_insn_nr++; | |
| 803 | |
|
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804 if (first) |
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805 { |
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806 printf (" HARD_REG_SET _regs_allocated;\n"); |
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807 printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); |
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808 first = false; |
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parents:
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changeset
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809 } |
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810 |
| 0 | 811 printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\ |
| 812 return NULL;\n", | |
| 813 XINT (elt, 0), | |
| 814 insn_nr, last_insn_nr, | |
| 815 XSTR (elt, 1), | |
| 816 GET_MODE_NAME (GET_MODE (elt))); | |
| 817 | |
| 818 } | |
| 819 else if (GET_CODE (elt) != MATCH_DUP) | |
| 820 insn_nr++; | |
| 821 } | |
| 822 } | |
| 823 | |
| 824 int | |
| 825 main (int argc, char **argv) | |
| 826 { | |
| 827 rtx desc; | |
| 828 | |
| 829 progname = "genemit"; | |
| 830 | |
| 831 if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE) | |
| 832 return (FATAL_EXIT_CODE); | |
| 833 | |
| 834 /* Assign sequential codes to all entries in the machine description | |
| 835 in parallel with the tables in insn-output.c. */ | |
| 836 | |
| 837 insn_code_number = 0; | |
| 838 insn_index_number = 0; | |
| 839 | |
| 840 printf ("/* Generated automatically by the program `genemit'\n\ | |
| 841 from the machine description file `md'. */\n\n"); | |
| 842 | |
| 843 printf ("#include \"config.h\"\n"); | |
| 844 printf ("#include \"system.h\"\n"); | |
| 845 printf ("#include \"coretypes.h\"\n"); | |
| 846 printf ("#include \"tm.h\"\n"); | |
| 847 printf ("#include \"rtl.h\"\n"); | |
| 848 printf ("#include \"tm_p.h\"\n"); | |
| 849 printf ("#include \"function.h\"\n"); | |
| 850 printf ("#include \"expr.h\"\n"); | |
| 851 printf ("#include \"optabs.h\"\n"); | |
| 852 printf ("#include \"real.h\"\n"); | |
| 853 printf ("#include \"dfp.h\"\n"); | |
| 854 printf ("#include \"flags.h\"\n"); | |
| 855 printf ("#include \"output.h\"\n"); | |
| 856 printf ("#include \"insn-config.h\"\n"); | |
| 857 printf ("#include \"hard-reg-set.h\"\n"); | |
| 858 printf ("#include \"recog.h\"\n"); | |
| 859 printf ("#include \"resource.h\"\n"); | |
| 860 printf ("#include \"reload.h\"\n"); | |
| 861 printf ("#include \"toplev.h\"\n"); | |
| 862 printf ("#include \"regs.h\"\n"); | |
| 863 printf ("#include \"tm-constrs.h\"\n"); | |
| 864 printf ("#include \"ggc.h\"\n"); | |
| 865 printf ("#include \"basic-block.h\"\n"); | |
| 866 printf ("#include \"integrate.h\"\n\n"); | |
| 867 printf ("#define FAIL return (end_sequence (), _val)\n"); | |
| 868 printf ("#define DONE return (_val = get_insns (), end_sequence (), _val)\n\n"); | |
| 869 | |
| 870 /* Read the machine description. */ | |
| 871 | |
| 872 while (1) | |
| 873 { | |
| 874 int line_no; | |
| 875 | |
| 876 desc = read_md_rtx (&line_no, &insn_code_number); | |
| 877 if (desc == NULL) | |
| 878 break; | |
| 879 | |
| 880 switch (GET_CODE (desc)) | |
| 881 { | |
| 882 case DEFINE_INSN: | |
| 883 gen_insn (desc, line_no); | |
| 884 break; | |
| 885 | |
| 886 case DEFINE_EXPAND: | |
| 887 printf ("/* %s:%d */\n", read_rtx_filename, line_no); | |
| 888 gen_expand (desc); | |
| 889 break; | |
| 890 | |
| 891 case DEFINE_SPLIT: | |
| 892 printf ("/* %s:%d */\n", read_rtx_filename, line_no); | |
| 893 gen_split (desc); | |
| 894 break; | |
| 895 | |
| 896 case DEFINE_PEEPHOLE2: | |
| 897 printf ("/* %s:%d */\n", read_rtx_filename, line_no); | |
| 898 gen_split (desc); | |
| 899 break; | |
| 900 | |
| 901 default: | |
| 902 break; | |
| 903 } | |
| 904 ++insn_index_number; | |
| 905 } | |
| 906 | |
| 907 /* Write out the routines to add CLOBBERs to a pattern and say whether they | |
| 908 clobber a hard reg. */ | |
| 909 output_add_clobbers (); | |
| 910 output_added_clobbers_hard_reg_p (); | |
| 911 | |
| 912 fflush (stdout); | |
| 913 return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
| 914 } |