Mercurial > hg > CbC > CbC_gcc
annotate gcc/genconfig.c @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Generate from machine description: |
| 2 - some #define configuration flags. | |
| 131 | 3 Copyright (C) 1987-2018 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 /* flags to determine output of machine description dependent #define's. */ | |
| 32 static int max_recog_operands; /* Largest operand number seen. */ | |
| 33 static int max_dup_operands; /* Largest number of match_dup in any insn. */ | |
| 34 static int max_clobbers_per_insn; | |
| 35 static int have_cc0_flag; | |
| 36 static int have_cmove_flag; | |
| 37 static int have_cond_exec_flag; | |
| 38 static int have_lo_sum_flag; | |
| 111 | 39 static int have_rotate_flag; |
| 40 static int have_rotatert_flag; | |
| 0 | 41 static int have_peephole_flag; |
| 42 static int have_peephole2_flag; | |
| 43 | |
| 44 /* Maximum number of insns seen in a split. */ | |
| 45 static int max_insns_per_split = 1; | |
| 46 | |
| 47 /* Maximum number of input insns for peephole2. */ | |
| 48 static int max_insns_per_peep2; | |
| 49 | |
| 50 static int clobbers_seen_this_insn; | |
| 51 static int dup_operands_seen_this_insn; | |
| 52 | |
| 53 static void walk_insn_part (rtx, int, int); | |
| 54 | |
| 55 /* RECOG_P will be nonzero if this pattern was seen in a context where it will | |
|
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update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
56 be used to recognize, rather than just generate an insn. |
| 0 | 57 |
| 58 NON_PC_SET_SRC will be nonzero if this pattern was seen in a SET_SRC | |
| 59 of a SET whose destination is not (pc). */ | |
| 60 | |
| 61 static void | |
| 62 walk_insn_part (rtx part, int recog_p, int non_pc_set_src) | |
| 63 { | |
| 64 int i, j; | |
| 65 RTX_CODE code; | |
| 66 const char *format_ptr; | |
| 67 | |
| 68 if (part == 0) | |
| 69 return; | |
| 70 | |
| 71 code = GET_CODE (part); | |
| 72 switch (code) | |
| 73 { | |
| 74 case CLOBBER: | |
| 131 | 75 case CLOBBER_HIGH: |
| 0 | 76 clobbers_seen_this_insn++; |
| 77 break; | |
| 78 | |
| 79 case MATCH_OPERAND: | |
| 80 if (XINT (part, 0) > max_recog_operands) | |
| 81 max_recog_operands = XINT (part, 0); | |
| 82 return; | |
| 83 | |
| 84 case MATCH_OP_DUP: | |
| 85 case MATCH_PAR_DUP: | |
| 86 ++dup_operands_seen_this_insn; | |
| 111 | 87 /* FALLTHRU */ |
| 0 | 88 case MATCH_SCRATCH: |
| 89 case MATCH_PARALLEL: | |
| 90 case MATCH_OPERATOR: | |
| 91 if (XINT (part, 0) > max_recog_operands) | |
| 92 max_recog_operands = XINT (part, 0); | |
| 93 /* Now scan the rtl's in the vector inside the MATCH_OPERATOR or | |
| 94 MATCH_PARALLEL. */ | |
| 95 break; | |
| 96 | |
| 97 case LABEL_REF: | |
| 98 if (GET_CODE (XEXP (part, 0)) == MATCH_OPERAND | |
| 99 || GET_CODE (XEXP (part, 0)) == MATCH_DUP) | |
| 100 break; | |
| 101 return; | |
| 102 | |
| 103 case MATCH_DUP: | |
| 104 ++dup_operands_seen_this_insn; | |
| 105 if (XINT (part, 0) > max_recog_operands) | |
| 106 max_recog_operands = XINT (part, 0); | |
| 107 return; | |
| 108 | |
| 109 case CC0: | |
| 110 if (recog_p) | |
| 111 have_cc0_flag = 1; | |
| 112 return; | |
| 113 | |
| 114 case LO_SUM: | |
| 115 if (recog_p) | |
| 116 have_lo_sum_flag = 1; | |
| 117 return; | |
| 118 | |
| 111 | 119 case ROTATE: |
| 120 if (recog_p) | |
| 121 have_rotate_flag = 1; | |
| 122 return; | |
| 123 | |
| 124 case ROTATERT: | |
| 125 if (recog_p) | |
| 126 have_rotatert_flag = 1; | |
| 127 return; | |
| 128 | |
| 0 | 129 case SET: |
| 130 walk_insn_part (SET_DEST (part), 0, recog_p); | |
| 131 walk_insn_part (SET_SRC (part), recog_p, | |
| 132 GET_CODE (SET_DEST (part)) != PC); | |
| 133 return; | |
| 134 | |
| 135 case IF_THEN_ELSE: | |
| 136 /* Only consider this machine as having a conditional move if the | |
| 137 two arms of the IF_THEN_ELSE are both MATCH_OPERAND. Otherwise, | |
| 138 we have some specific IF_THEN_ELSE construct (like the doz | |
| 139 instruction on the RS/6000) that can't be used in the general | |
| 140 context we want it for. */ | |
| 141 | |
| 142 if (recog_p && non_pc_set_src | |
| 143 && GET_CODE (XEXP (part, 1)) == MATCH_OPERAND | |
| 144 && GET_CODE (XEXP (part, 2)) == MATCH_OPERAND) | |
| 145 have_cmove_flag = 1; | |
| 146 break; | |
| 147 | |
| 148 case COND_EXEC: | |
| 149 if (recog_p) | |
| 150 have_cond_exec_flag = 1; | |
| 151 break; | |
| 152 | |
| 153 case REG: case CONST_INT: case SYMBOL_REF: | |
| 154 case PC: | |
| 155 return; | |
| 156 | |
| 157 default: | |
| 158 break; | |
| 159 } | |
| 160 | |
| 161 format_ptr = GET_RTX_FORMAT (GET_CODE (part)); | |
| 162 | |
| 163 for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++) | |
| 164 switch (*format_ptr++) | |
| 165 { | |
| 166 case 'e': | |
| 167 case 'u': | |
| 168 walk_insn_part (XEXP (part, i), recog_p, non_pc_set_src); | |
| 169 break; | |
| 170 case 'E': | |
| 171 if (XVEC (part, i) != NULL) | |
| 172 for (j = 0; j < XVECLEN (part, i); j++) | |
| 173 walk_insn_part (XVECEXP (part, i, j), recog_p, non_pc_set_src); | |
| 174 break; | |
| 175 } | |
| 176 } | |
| 177 | |
| 178 static void | |
| 111 | 179 gen_insn (md_rtx_info *info) |
| 0 | 180 { |
| 181 int i; | |
| 182 | |
| 183 /* Walk the insn pattern to gather the #define's status. */ | |
| 111 | 184 rtx insn = info->def; |
| 0 | 185 clobbers_seen_this_insn = 0; |
| 186 dup_operands_seen_this_insn = 0; | |
| 187 if (XVEC (insn, 1) != 0) | |
| 188 for (i = 0; i < XVECLEN (insn, 1); i++) | |
| 189 walk_insn_part (XVECEXP (insn, 1, i), 1, 0); | |
| 190 | |
| 191 if (clobbers_seen_this_insn > max_clobbers_per_insn) | |
| 192 max_clobbers_per_insn = clobbers_seen_this_insn; | |
| 193 if (dup_operands_seen_this_insn > max_dup_operands) | |
| 194 max_dup_operands = dup_operands_seen_this_insn; | |
| 195 } | |
| 196 | |
| 197 /* Similar but scan a define_expand. */ | |
| 198 | |
| 199 static void | |
| 111 | 200 gen_expand (md_rtx_info *info) |
| 0 | 201 { |
| 202 int i; | |
| 203 | |
| 204 /* Walk the insn pattern to gather the #define's status. */ | |
| 205 | |
| 206 /* Note that we don't bother recording the number of MATCH_DUPs | |
| 207 that occur in a gen_expand, because only reload cares about that. */ | |
| 111 | 208 rtx insn = info->def; |
| 0 | 209 if (XVEC (insn, 1) != 0) |
| 210 for (i = 0; i < XVECLEN (insn, 1); i++) | |
| 211 { | |
| 212 /* Compute the maximum SETs and CLOBBERS | |
| 213 in any one of the sub-insns; | |
| 214 don't sum across all of them. */ | |
| 215 clobbers_seen_this_insn = 0; | |
| 216 | |
| 217 walk_insn_part (XVECEXP (insn, 1, i), 0, 0); | |
| 218 | |
| 219 if (clobbers_seen_this_insn > max_clobbers_per_insn) | |
| 220 max_clobbers_per_insn = clobbers_seen_this_insn; | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 /* Similar but scan a define_split. */ | |
| 225 | |
| 226 static void | |
| 111 | 227 gen_split (md_rtx_info *info) |
| 0 | 228 { |
| 229 int i; | |
| 230 | |
| 231 /* Look through the patterns that are matched | |
| 232 to compute the maximum operand number. */ | |
| 111 | 233 rtx split = info->def; |
| 0 | 234 for (i = 0; i < XVECLEN (split, 0); i++) |
| 235 walk_insn_part (XVECEXP (split, 0, i), 1, 0); | |
| 236 /* Look at the number of insns this insn could split into. */ | |
| 237 if (XVECLEN (split, 2) > max_insns_per_split) | |
| 238 max_insns_per_split = XVECLEN (split, 2); | |
| 239 } | |
| 240 | |
| 241 static void | |
| 111 | 242 gen_peephole (md_rtx_info *info) |
| 0 | 243 { |
| 244 int i; | |
| 245 | |
| 246 /* Look through the patterns that are matched | |
| 247 to compute the maximum operand number. */ | |
| 111 | 248 rtx peep = info->def; |
| 0 | 249 for (i = 0; i < XVECLEN (peep, 0); i++) |
| 250 walk_insn_part (XVECEXP (peep, 0, i), 1, 0); | |
| 251 } | |
| 252 | |
| 253 static void | |
| 111 | 254 gen_peephole2 (md_rtx_info *info) |
| 0 | 255 { |
| 256 int i, n; | |
| 257 | |
| 258 /* Look through the patterns that are matched | |
| 259 to compute the maximum operand number. */ | |
| 111 | 260 rtx peep = info->def; |
| 0 | 261 for (i = XVECLEN (peep, 0) - 1; i >= 0; --i) |
| 262 walk_insn_part (XVECEXP (peep, 0, i), 1, 0); | |
| 263 | |
| 264 /* Look at the number of insns this insn can be matched from. */ | |
| 265 for (i = XVECLEN (peep, 0) - 1, n = 0; i >= 0; --i) | |
| 266 if (GET_CODE (XVECEXP (peep, 0, i)) != MATCH_DUP | |
| 267 && GET_CODE (XVECEXP (peep, 0, i)) != MATCH_SCRATCH) | |
| 268 n++; | |
| 269 if (n > max_insns_per_peep2) | |
| 270 max_insns_per_peep2 = n; | |
| 271 } | |
| 272 | |
| 273 int | |
| 111 | 274 main (int argc, const char **argv) |
| 0 | 275 { |
| 276 progname = "genconfig"; | |
| 277 | |
|
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f6334be47118
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nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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278 if (!init_rtx_reader_args (argc, argv)) |
| 0 | 279 return (FATAL_EXIT_CODE); |
| 280 | |
| 281 puts ("/* Generated automatically by the program `genconfig'"); | |
| 282 puts (" from the machine description file `md'. */\n"); | |
| 283 puts ("#ifndef GCC_INSN_CONFIG_H"); | |
| 284 puts ("#define GCC_INSN_CONFIG_H\n"); | |
| 285 | |
| 286 /* Allow at least 30 operands for the sake of asm constructs. */ | |
| 287 /* ??? We *really* ought to reorganize things such that there | |
| 288 is no fixed upper bound. */ | |
| 289 max_recog_operands = 29; /* We will add 1 later. */ | |
| 290 max_dup_operands = 1; | |
| 291 | |
| 292 /* Read the machine description. */ | |
| 293 | |
| 111 | 294 md_rtx_info info; |
| 295 while (read_md_rtx (&info)) | |
| 296 switch (GET_CODE (info.def)) | |
| 297 { | |
| 298 case DEFINE_INSN: | |
| 299 gen_insn (&info); | |
| 300 break; | |
| 0 | 301 |
| 111 | 302 case DEFINE_EXPAND: |
| 303 gen_expand (&info); | |
| 0 | 304 break; |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
305 |
| 111 | 306 case DEFINE_SPLIT: |
| 307 gen_split (&info); | |
| 308 break; | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
309 |
| 111 | 310 case DEFINE_PEEPHOLE2: |
| 311 have_peephole2_flag = 1; | |
| 312 gen_peephole2 (&info); | |
| 313 break; | |
| 0 | 314 |
| 111 | 315 case DEFINE_PEEPHOLE: |
| 316 have_peephole_flag = 1; | |
| 317 gen_peephole (&info); | |
| 318 break; | |
| 0 | 319 |
| 111 | 320 default: |
| 321 break; | |
| 322 } | |
| 0 | 323 |
| 324 printf ("#define MAX_RECOG_OPERANDS %d\n", max_recog_operands + 1); | |
| 325 printf ("#define MAX_DUP_OPERANDS %d\n", max_dup_operands); | |
| 326 | |
| 327 /* This is conditionally defined, in case the user writes code which emits | |
| 328 more splits than we can readily see (and knows s/he does it). */ | |
| 329 printf ("#ifndef MAX_INSNS_PER_SPLIT\n"); | |
| 330 printf ("#define MAX_INSNS_PER_SPLIT %d\n", max_insns_per_split); | |
| 331 printf ("#endif\n"); | |
| 332 | |
| 333 if (have_cc0_flag) | |
| 334 { | |
| 335 printf ("#define HAVE_cc0 1\n"); | |
| 336 printf ("#define CC0_P(X) ((X) == cc0_rtx)\n"); | |
| 337 } | |
| 338 else | |
| 339 { | |
| 340 /* We output CC0_P this way to make sure that X is declared | |
| 341 somewhere. */ | |
| 111 | 342 printf ("#define HAVE_cc0 0\n"); |
| 0 | 343 printf ("#define CC0_P(X) ((X) ? 0 : 0)\n"); |
| 344 } | |
| 345 | |
| 346 if (have_cmove_flag) | |
| 347 printf ("#define HAVE_conditional_move 1\n"); | |
| 111 | 348 else |
| 349 printf ("#define HAVE_conditional_move 0\n"); | |
| 0 | 350 |
| 351 if (have_cond_exec_flag) | |
| 352 printf ("#define HAVE_conditional_execution 1\n"); | |
| 111 | 353 else |
| 354 printf ("#define HAVE_conditional_execution 0\n"); | |
| 0 | 355 |
| 356 if (have_lo_sum_flag) | |
| 357 printf ("#define HAVE_lo_sum 1\n"); | |
| 111 | 358 else |
| 359 printf ("#define HAVE_lo_sum 0\n"); | |
| 360 | |
| 361 if (have_rotate_flag) | |
| 362 printf ("#define HAVE_rotate 1\n"); | |
| 363 | |
| 364 if (have_rotatert_flag) | |
| 365 printf ("#define HAVE_rotatert 1\n"); | |
| 0 | 366 |
| 367 if (have_peephole_flag) | |
| 368 printf ("#define HAVE_peephole 1\n"); | |
| 111 | 369 else |
| 370 printf ("#define HAVE_peephole 0\n"); | |
| 0 | 371 |
| 372 if (have_peephole2_flag) | |
| 373 { | |
| 374 printf ("#define HAVE_peephole2 1\n"); | |
| 375 printf ("#define MAX_INSNS_PER_PEEP2 %d\n", max_insns_per_peep2); | |
| 376 } | |
| 111 | 377 else |
| 378 { | |
| 379 printf ("#define HAVE_peephole2 0\n"); | |
| 380 printf ("#define MAX_INSNS_PER_PEEP2 0\n"); | |
| 381 } | |
| 0 | 382 |
| 111 | 383 puts ("\n#endif /* GCC_INSN_CONFIG_H */"); |
| 0 | 384 |
| 385 if (ferror (stdout) || fflush (stdout) || fclose (stdout)) | |
| 386 return FATAL_EXIT_CODE; | |
| 387 | |
| 388 return SUCCESS_EXIT_CODE; | |
| 389 } |