| File: | build/gcc/recog.c |
| Warning: | line 377, column 19 Although the value stored to 'pat' is used in the enclosing expression, the value is never actually read from 'pat' |
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| 1 | /* Subroutines used by or related to instruction recognition. |
| 2 | Copyright (C) 1987-2021 Free Software Foundation, Inc. |
| 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 "config.h" |
| 22 | #include "system.h" |
| 23 | #include "coretypes.h" |
| 24 | #include "backend.h" |
| 25 | #include "target.h" |
| 26 | #include "rtl.h" |
| 27 | #include "tree.h" |
| 28 | #include "cfghooks.h" |
| 29 | #include "df.h" |
| 30 | #include "memmodel.h" |
| 31 | #include "tm_p.h" |
| 32 | #include "insn-config.h" |
| 33 | #include "regs.h" |
| 34 | #include "emit-rtl.h" |
| 35 | #include "recog.h" |
| 36 | #include "insn-attr.h" |
| 37 | #include "addresses.h" |
| 38 | #include "cfgrtl.h" |
| 39 | #include "cfgbuild.h" |
| 40 | #include "cfgcleanup.h" |
| 41 | #include "reload.h" |
| 42 | #include "tree-pass.h" |
| 43 | #include "function-abi.h" |
| 44 | |
| 45 | #ifndef STACK_POP_CODEPOST_INC |
| 46 | #if STACK_GROWS_DOWNWARD1 |
| 47 | #define STACK_POP_CODEPOST_INC POST_INC |
| 48 | #else |
| 49 | #define STACK_POP_CODEPOST_INC POST_DEC |
| 50 | #endif |
| 51 | #endif |
| 52 | |
| 53 | static void validate_replace_rtx_1 (rtx *, rtx, rtx, rtx_insn *, bool); |
| 54 | static void validate_replace_src_1 (rtx *, void *); |
| 55 | static rtx_insn *split_insn (rtx_insn *); |
| 56 | |
| 57 | struct target_recog default_target_recog; |
| 58 | #if SWITCHABLE_TARGET1 |
| 59 | struct target_recog *this_target_recog = &default_target_recog; |
| 60 | #endif |
| 61 | |
| 62 | /* Nonzero means allow operands to be volatile. |
| 63 | This should be 0 if you are generating rtl, such as if you are calling |
| 64 | the functions in optabs.c and expmed.c (most of the time). |
| 65 | This should be 1 if all valid insns need to be recognized, |
| 66 | such as in reginfo.c and final.c and reload.c. |
| 67 | |
| 68 | init_recog and init_recog_no_volatile are responsible for setting this. */ |
| 69 | |
| 70 | int volatile_ok; |
| 71 | |
| 72 | struct recog_data_d recog_data; |
| 73 | |
| 74 | /* Contains a vector of operand_alternative structures, such that |
| 75 | operand OP of alternative A is at index A * n_operands + OP. |
| 76 | Set up by preprocess_constraints. */ |
| 77 | const operand_alternative *recog_op_alt; |
| 78 | |
| 79 | /* Used to provide recog_op_alt for asms. */ |
| 80 | static operand_alternative asm_op_alt[MAX_RECOG_OPERANDS30 |
| 81 | * MAX_RECOG_ALTERNATIVES35]; |
| 82 | |
| 83 | /* On return from `constrain_operands', indicate which alternative |
| 84 | was satisfied. */ |
| 85 | |
| 86 | int which_alternative; |
| 87 | |
| 88 | /* Nonzero after end of reload pass. |
| 89 | Set to 1 or 0 by toplev.c. |
| 90 | Controls the significance of (SUBREG (MEM)). */ |
| 91 | |
| 92 | int reload_completed; |
| 93 | |
| 94 | /* Nonzero after thread_prologue_and_epilogue_insns has run. */ |
| 95 | int epilogue_completed; |
| 96 | |
| 97 | /* Initialize data used by the function `recog'. |
| 98 | This must be called once in the compilation of a function |
| 99 | before any insn recognition may be done in the function. */ |
| 100 | |
| 101 | void |
| 102 | init_recog_no_volatile (void) |
| 103 | { |
| 104 | volatile_ok = 0; |
| 105 | } |
| 106 | |
| 107 | void |
| 108 | init_recog (void) |
| 109 | { |
| 110 | volatile_ok = 1; |
| 111 | } |
| 112 | |
| 113 | |
| 114 | /* Return true if labels in asm operands BODY are LABEL_REFs. */ |
| 115 | |
| 116 | static bool |
| 117 | asm_labels_ok (rtx body) |
| 118 | { |
| 119 | rtx asmop; |
| 120 | int i; |
| 121 | |
| 122 | asmop = extract_asm_operands (body); |
| 123 | if (asmop == NULL_RTX(rtx) 0) |
| 124 | return true; |
| 125 | |
| 126 | for (i = 0; i < ASM_OPERANDS_LABEL_LENGTH (asmop)(((((asmop)->u.fld[5]).rt_rtvec))->num_elem); i++) |
| 127 | if (GET_CODE (ASM_OPERANDS_LABEL (asmop, i))((enum rtx_code) ((((((asmop)->u.fld[5]).rt_rtvec))->elem [i]))->code) != LABEL_REF) |
| 128 | return false; |
| 129 | |
| 130 | return true; |
| 131 | } |
| 132 | |
| 133 | /* Check that X is an insn-body for an `asm' with operands |
| 134 | and that the operands mentioned in it are legitimate. */ |
| 135 | |
| 136 | int |
| 137 | check_asm_operands (rtx x) |
| 138 | { |
| 139 | int noperands; |
| 140 | rtx *operands; |
| 141 | const char **constraints; |
| 142 | int i; |
| 143 | |
| 144 | if (!asm_labels_ok (x)) |
| 145 | return 0; |
| 146 | |
| 147 | /* Post-reload, be more strict with things. */ |
| 148 | if (reload_completed) |
| 149 | { |
| 150 | /* ??? Doh! We've not got the wrapping insn. Cook one up. */ |
| 151 | rtx_insn *insn = make_insn_raw (x); |
| 152 | extract_insn (insn); |
| 153 | constrain_operands (1, get_enabled_alternatives (insn)); |
| 154 | return which_alternative >= 0; |
| 155 | } |
| 156 | |
| 157 | noperands = asm_noperands (x); |
| 158 | if (noperands < 0) |
| 159 | return 0; |
| 160 | if (noperands == 0) |
| 161 | return 1; |
| 162 | |
| 163 | operands = XALLOCAVEC (rtx, noperands)((rtx *) __builtin_alloca(sizeof (rtx) * (noperands))); |
| 164 | constraints = XALLOCAVEC (const char *, noperands)((const char * *) __builtin_alloca(sizeof (const char *) * (noperands ))); |
| 165 | |
| 166 | decode_asm_operands (x, operands, NULLnullptr, constraints, NULLnullptr, NULLnullptr); |
| 167 | |
| 168 | for (i = 0; i < noperands; i++) |
| 169 | { |
| 170 | const char *c = constraints[i]; |
| 171 | if (c[0] == '%') |
| 172 | c++; |
| 173 | if (! asm_operand_ok (operands[i], c, constraints)) |
| 174 | return 0; |
| 175 | } |
| 176 | |
| 177 | return 1; |
| 178 | } |
| 179 | |
| 180 | /* Static data for the next two routines. */ |
| 181 | |
| 182 | struct change_t |
| 183 | { |
| 184 | rtx object; |
| 185 | int old_code; |
| 186 | int old_len; |
| 187 | bool unshare; |
| 188 | rtx *loc; |
| 189 | rtx old; |
| 190 | }; |
| 191 | |
| 192 | static change_t *changes; |
| 193 | static int changes_allocated; |
| 194 | |
| 195 | static int num_changes = 0; |
| 196 | static int temporarily_undone_changes = 0; |
| 197 | |
| 198 | /* Validate a proposed change to OBJECT. LOC is the location in the rtl |
| 199 | at which NEW_RTX will be placed. If NEW_LEN is >= 0, XVECLEN (NEW_RTX, 0) |
| 200 | will also be changed to NEW_LEN, which is no greater than the current |
| 201 | XVECLEN. If OBJECT is zero, no validation is done, the change is |
| 202 | simply made. |
| 203 | |
| 204 | Two types of objects are supported: If OBJECT is a MEM, memory_address_p |
| 205 | will be called with the address and mode as parameters. If OBJECT is |
| 206 | an INSN, CALL_INSN, or JUMP_INSN, the insn will be re-recognized with |
| 207 | the change in place. |
| 208 | |
| 209 | IN_GROUP is nonzero if this is part of a group of changes that must be |
| 210 | performed as a group. In that case, the changes will be stored. The |
| 211 | function `apply_change_group' will validate and apply the changes. |
| 212 | |
| 213 | If IN_GROUP is zero, this is a single change. Try to recognize the insn |
| 214 | or validate the memory reference with the change applied. If the result |
| 215 | is not valid for the machine, suppress the change and return zero. |
| 216 | Otherwise, perform the change and return 1. */ |
| 217 | |
| 218 | static bool |
| 219 | validate_change_1 (rtx object, rtx *loc, rtx new_rtx, bool in_group, |
| 220 | bool unshare, int new_len = -1) |
| 221 | { |
| 222 | gcc_assert (temporarily_undone_changes == 0)((void)(!(temporarily_undone_changes == 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 222, __FUNCTION__), 0 : 0)); |
| 223 | rtx old = *loc; |
| 224 | |
| 225 | /* Single-element parallels aren't valid and won't match anything. |
| 226 | Replace them with the single element. */ |
| 227 | if (new_len == 1 && GET_CODE (new_rtx)((enum rtx_code) (new_rtx)->code) == PARALLEL) |
| 228 | { |
| 229 | new_rtx = XVECEXP (new_rtx, 0, 0)(((((new_rtx)->u.fld[0]).rt_rtvec))->elem[0]); |
| 230 | new_len = -1; |
| 231 | } |
| 232 | |
| 233 | if ((old == new_rtx || rtx_equal_p (old, new_rtx)) |
| 234 | && (new_len < 0 || XVECLEN (new_rtx, 0)(((((new_rtx)->u.fld[0]).rt_rtvec))->num_elem) == new_len)) |
| 235 | return 1; |
| 236 | |
| 237 | gcc_assert ((in_group != 0 || num_changes == 0)((void)(!((in_group != 0 || num_changes == 0) && (new_len < 0 || new_rtx == *loc)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 238, __FUNCTION__), 0 : 0)) |
| 238 | && (new_len < 0 || new_rtx == *loc))((void)(!((in_group != 0 || num_changes == 0) && (new_len < 0 || new_rtx == *loc)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 238, __FUNCTION__), 0 : 0)); |
| 239 | |
| 240 | *loc = new_rtx; |
| 241 | |
| 242 | /* Save the information describing this change. */ |
| 243 | if (num_changes >= changes_allocated) |
| 244 | { |
| 245 | if (changes_allocated == 0) |
| 246 | /* This value allows for repeated substitutions inside complex |
| 247 | indexed addresses, or changes in up to 5 insns. */ |
| 248 | changes_allocated = MAX_RECOG_OPERANDS30 * 5; |
| 249 | else |
| 250 | changes_allocated *= 2; |
| 251 | |
| 252 | changes = XRESIZEVEC (change_t, changes, changes_allocated)((change_t *) xrealloc ((void *) (changes), sizeof (change_t) * (changes_allocated))); |
| 253 | } |
| 254 | |
| 255 | changes[num_changes].object = object; |
| 256 | changes[num_changes].loc = loc; |
| 257 | changes[num_changes].old = old; |
| 258 | changes[num_changes].old_len = (new_len >= 0 ? XVECLEN (new_rtx, 0)(((((new_rtx)->u.fld[0]).rt_rtvec))->num_elem) : -1); |
| 259 | changes[num_changes].unshare = unshare; |
| 260 | |
| 261 | if (new_len >= 0) |
| 262 | XVECLEN (new_rtx, 0)(((((new_rtx)->u.fld[0]).rt_rtvec))->num_elem) = new_len; |
| 263 | |
| 264 | if (object && !MEM_P (object)(((enum rtx_code) (object)->code) == MEM)) |
| 265 | { |
| 266 | /* Set INSN_CODE to force rerecognition of insn. Save old code in |
| 267 | case invalid. */ |
| 268 | changes[num_changes].old_code = INSN_CODE (object)(((object)->u.fld[5]).rt_int); |
| 269 | INSN_CODE (object)(((object)->u.fld[5]).rt_int) = -1; |
| 270 | } |
| 271 | |
| 272 | num_changes++; |
| 273 | |
| 274 | /* If we are making a group of changes, return 1. Otherwise, validate the |
| 275 | change group we made. */ |
| 276 | |
| 277 | if (in_group) |
| 278 | return 1; |
| 279 | else |
| 280 | return apply_change_group (); |
| 281 | } |
| 282 | |
| 283 | /* Wrapper for validate_change_1 without the UNSHARE argument defaulting |
| 284 | UNSHARE to false. */ |
| 285 | |
| 286 | bool |
| 287 | validate_change (rtx object, rtx *loc, rtx new_rtx, bool in_group) |
| 288 | { |
| 289 | return validate_change_1 (object, loc, new_rtx, in_group, false); |
| 290 | } |
| 291 | |
| 292 | /* Wrapper for validate_change_1 without the UNSHARE argument defaulting |
| 293 | UNSHARE to true. */ |
| 294 | |
| 295 | bool |
| 296 | validate_unshare_change (rtx object, rtx *loc, rtx new_rtx, bool in_group) |
| 297 | { |
| 298 | return validate_change_1 (object, loc, new_rtx, in_group, true); |
| 299 | } |
| 300 | |
| 301 | /* Change XVECLEN (*LOC, 0) to NEW_LEN. OBJECT, IN_GROUP and the return |
| 302 | value are as for validate_change_1. */ |
| 303 | |
| 304 | bool |
| 305 | validate_change_xveclen (rtx object, rtx *loc, int new_len, bool in_group) |
| 306 | { |
| 307 | return validate_change_1 (object, loc, *loc, in_group, false, new_len); |
| 308 | } |
| 309 | |
| 310 | /* Keep X canonicalized if some changes have made it non-canonical; only |
| 311 | modifies the operands of X, not (for example) its code. Simplifications |
| 312 | are not the job of this routine. |
| 313 | |
| 314 | Return true if anything was changed. */ |
| 315 | bool |
| 316 | canonicalize_change_group (rtx_insn *insn, rtx x) |
| 317 | { |
| 318 | if (COMMUTATIVE_P (x)(((rtx_class[(int) (((enum rtx_code) (x)->code))]) & ( ~2)) == (RTX_COMM_COMPARE & (~2))) |
| 319 | && swap_commutative_operands_p (XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx))) |
| 320 | { |
| 321 | /* Oops, the caller has made X no longer canonical. |
| 322 | Let's redo the changes in the correct order. */ |
| 323 | rtx tem = XEXP (x, 0)(((x)->u.fld[0]).rt_rtx); |
| 324 | validate_unshare_change (insn, &XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx), 1); |
| 325 | validate_unshare_change (insn, &XEXP (x, 1)(((x)->u.fld[1]).rt_rtx), tem, 1); |
| 326 | return true; |
| 327 | } |
| 328 | else |
| 329 | return false; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | /* This subroutine of apply_change_group verifies whether the changes to INSN |
| 334 | were valid; i.e. whether INSN can still be recognized. |
| 335 | |
| 336 | If IN_GROUP is true clobbers which have to be added in order to |
| 337 | match the instructions will be added to the current change group. |
| 338 | Otherwise the changes will take effect immediately. */ |
| 339 | |
| 340 | int |
| 341 | insn_invalid_p (rtx_insn *insn, bool in_group) |
| 342 | { |
| 343 | rtx pat = PATTERN (insn); |
| 344 | int num_clobbers = 0; |
| 345 | /* If we are before reload and the pattern is a SET, see if we can add |
| 346 | clobbers. */ |
| 347 | int icode = recog (pat, insn, |
| 348 | (GET_CODE (pat)((enum rtx_code) (pat)->code) == SET |
| 349 | && ! reload_completed |
| 350 | && ! reload_in_progress) |
| 351 | ? &num_clobbers : 0); |
| 352 | int is_asm = icode < 0 && asm_noperands (PATTERN (insn)) >= 0; |
| 353 | |
| 354 | |
| 355 | /* If this is an asm and the operand aren't legal, then fail. Likewise if |
| 356 | this is not an asm and the insn wasn't recognized. */ |
| 357 | if ((is_asm && ! check_asm_operands (PATTERN (insn))) |
| 358 | || (!is_asm && icode < 0)) |
| 359 | return 1; |
| 360 | |
| 361 | /* If we have to add CLOBBERs, fail if we have to add ones that reference |
| 362 | hard registers since our callers can't know if they are live or not. |
| 363 | Otherwise, add them. */ |
| 364 | if (num_clobbers > 0) |
| 365 | { |
| 366 | rtx newpat; |
| 367 | |
| 368 | if (added_clobbers_hard_reg_p (icode)) |
| 369 | return 1; |
| 370 | |
| 371 | newpat = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (num_clobbers + 1))gen_rtx_fmt_E_stat ((PARALLEL), ((((void) 0, E_VOIDmode))), ( (rtvec_alloc (num_clobbers + 1))) ); |
| 372 | XVECEXP (newpat, 0, 0)(((((newpat)->u.fld[0]).rt_rtvec))->elem[0]) = pat; |
| 373 | add_clobbers (newpat, icode); |
| 374 | if (in_group) |
| 375 | validate_change (insn, &PATTERN (insn), newpat, 1); |
| 376 | else |
| 377 | PATTERN (insn) = pat = newpat; |
Although the value stored to 'pat' is used in the enclosing expression, the value is never actually read from 'pat' | |
| 378 | } |
| 379 | |
| 380 | /* After reload, verify that all constraints are satisfied. */ |
| 381 | if (reload_completed) |
| 382 | { |
| 383 | extract_insn (insn); |
| 384 | |
| 385 | if (! constrain_operands (1, get_preferred_alternatives (insn))) |
| 386 | return 1; |
| 387 | } |
| 388 | |
| 389 | INSN_CODE (insn)(((insn)->u.fld[5]).rt_int) = icode; |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | /* Return number of changes made and not validated yet. */ |
| 394 | int |
| 395 | num_changes_pending (void) |
| 396 | { |
| 397 | return num_changes; |
| 398 | } |
| 399 | |
| 400 | /* Tentatively apply the changes numbered NUM and up. |
| 401 | Return 1 if all changes are valid, zero otherwise. */ |
| 402 | |
| 403 | int |
| 404 | verify_changes (int num) |
| 405 | { |
| 406 | int i; |
| 407 | rtx last_validated = NULL_RTX(rtx) 0; |
| 408 | |
| 409 | /* The changes have been applied and all INSN_CODEs have been reset to force |
| 410 | rerecognition. |
| 411 | |
| 412 | The changes are valid if we aren't given an object, or if we are |
| 413 | given a MEM and it still is a valid address, or if this is in insn |
| 414 | and it is recognized. In the latter case, if reload has completed, |
| 415 | we also require that the operands meet the constraints for |
| 416 | the insn. */ |
| 417 | |
| 418 | for (i = num; i < num_changes; i++) |
| 419 | { |
| 420 | rtx object = changes[i].object; |
| 421 | |
| 422 | /* If there is no object to test or if it is the same as the one we |
| 423 | already tested, ignore it. */ |
| 424 | if (object == 0 || object == last_validated) |
| 425 | continue; |
| 426 | |
| 427 | if (MEM_P (object)(((enum rtx_code) (object)->code) == MEM)) |
| 428 | { |
| 429 | if (! memory_address_addr_space_p (GET_MODE (object)((machine_mode) (object)->mode), |
| 430 | XEXP (object, 0)(((object)->u.fld[0]).rt_rtx), |
| 431 | MEM_ADDR_SPACE (object)(get_mem_attrs (object)->addrspace))) |
| 432 | break; |
| 433 | } |
| 434 | else if (/* changes[i].old might be zero, e.g. when putting a |
| 435 | REG_FRAME_RELATED_EXPR into a previously empty list. */ |
| 436 | changes[i].old |
| 437 | && REG_P (changes[i].old)(((enum rtx_code) (changes[i].old)->code) == REG) |
| 438 | && asm_noperands (PATTERN (object)) > 0 |
| 439 | && register_asm_p (changes[i].old)) |
| 440 | { |
| 441 | /* Don't allow changes of hard register operands to inline |
| 442 | assemblies if they have been defined as register asm ("x"). */ |
| 443 | break; |
| 444 | } |
| 445 | else if (DEBUG_INSN_P (object)(((enum rtx_code) (object)->code) == DEBUG_INSN)) |
| 446 | continue; |
| 447 | else if (insn_invalid_p (as_a <rtx_insn *> (object), true)) |
| 448 | { |
| 449 | rtx pat = PATTERN (object); |
| 450 | |
| 451 | /* Perhaps we couldn't recognize the insn because there were |
| 452 | extra CLOBBERs at the end. If so, try to re-recognize |
| 453 | without the last CLOBBER (later iterations will cause each of |
| 454 | them to be eliminated, in turn). But don't do this if we |
| 455 | have an ASM_OPERAND. */ |
| 456 | if (GET_CODE (pat)((enum rtx_code) (pat)->code) == PARALLEL |
| 457 | && GET_CODE (XVECEXP (pat, 0, XVECLEN (pat, 0) - 1))((enum rtx_code) ((((((pat)->u.fld[0]).rt_rtvec))->elem [(((((pat)->u.fld[0]).rt_rtvec))->num_elem) - 1]))-> code) == CLOBBER |
| 458 | && asm_noperands (PATTERN (object)) < 0) |
| 459 | { |
| 460 | rtx newpat; |
| 461 | |
| 462 | if (XVECLEN (pat, 0)(((((pat)->u.fld[0]).rt_rtvec))->num_elem) == 2) |
| 463 | newpat = XVECEXP (pat, 0, 0)(((((pat)->u.fld[0]).rt_rtvec))->elem[0]); |
| 464 | else |
| 465 | { |
| 466 | int j; |
| 467 | |
| 468 | newpat |
| 469 | = gen_rtx_PARALLEL (VOIDmode,gen_rtx_fmt_E_stat ((PARALLEL), ((((void) 0, E_VOIDmode))), ( (rtvec_alloc ((((((pat)->u.fld[0]).rt_rtvec))->num_elem ) - 1))) ) |
| 470 | rtvec_alloc (XVECLEN (pat, 0) - 1))gen_rtx_fmt_E_stat ((PARALLEL), ((((void) 0, E_VOIDmode))), ( (rtvec_alloc ((((((pat)->u.fld[0]).rt_rtvec))->num_elem ) - 1))) ); |
| 471 | for (j = 0; j < XVECLEN (newpat, 0)(((((newpat)->u.fld[0]).rt_rtvec))->num_elem); j++) |
| 472 | XVECEXP (newpat, 0, j)(((((newpat)->u.fld[0]).rt_rtvec))->elem[j]) = XVECEXP (pat, 0, j)(((((pat)->u.fld[0]).rt_rtvec))->elem[j]); |
| 473 | } |
| 474 | |
| 475 | /* Add a new change to this group to replace the pattern |
| 476 | with this new pattern. Then consider this change |
| 477 | as having succeeded. The change we added will |
| 478 | cause the entire call to fail if things remain invalid. |
| 479 | |
| 480 | Note that this can lose if a later change than the one |
| 481 | we are processing specified &XVECEXP (PATTERN (object), 0, X) |
| 482 | but this shouldn't occur. */ |
| 483 | |
| 484 | validate_change (object, &PATTERN (object), newpat, 1); |
| 485 | continue; |
| 486 | } |
| 487 | else if (GET_CODE (pat)((enum rtx_code) (pat)->code) == USE || GET_CODE (pat)((enum rtx_code) (pat)->code) == CLOBBER |
| 488 | || GET_CODE (pat)((enum rtx_code) (pat)->code) == VAR_LOCATION) |
| 489 | /* If this insn is a CLOBBER or USE, it is always valid, but is |
| 490 | never recognized. */ |
| 491 | continue; |
| 492 | else |
| 493 | break; |
| 494 | } |
| 495 | last_validated = object; |
| 496 | } |
| 497 | |
| 498 | return (i == num_changes); |
| 499 | } |
| 500 | |
| 501 | /* A group of changes has previously been issued with validate_change |
| 502 | and verified with verify_changes. Call df_insn_rescan for each of |
| 503 | the insn changed and clear num_changes. */ |
| 504 | |
| 505 | void |
| 506 | confirm_change_group (void) |
| 507 | { |
| 508 | int i; |
| 509 | rtx last_object = NULLnullptr; |
| 510 | |
| 511 | gcc_assert (temporarily_undone_changes == 0)((void)(!(temporarily_undone_changes == 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 511, __FUNCTION__), 0 : 0)); |
| 512 | for (i = 0; i < num_changes; i++) |
| 513 | { |
| 514 | rtx object = changes[i].object; |
| 515 | |
| 516 | if (changes[i].unshare) |
| 517 | *changes[i].loc = copy_rtx (*changes[i].loc); |
| 518 | |
| 519 | /* Avoid unnecessary rescanning when multiple changes to same instruction |
| 520 | are made. */ |
| 521 | if (object) |
| 522 | { |
| 523 | if (object != last_object && last_object && INSN_P (last_object)(((((enum rtx_code) (last_object)->code) == INSN) || (((enum rtx_code) (last_object)->code) == JUMP_INSN) || (((enum rtx_code ) (last_object)->code) == CALL_INSN)) || (((enum rtx_code) (last_object)->code) == DEBUG_INSN))) |
| 524 | df_insn_rescan (as_a <rtx_insn *> (last_object)); |
| 525 | last_object = object; |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | if (last_object && INSN_P (last_object)(((((enum rtx_code) (last_object)->code) == INSN) || (((enum rtx_code) (last_object)->code) == JUMP_INSN) || (((enum rtx_code ) (last_object)->code) == CALL_INSN)) || (((enum rtx_code) (last_object)->code) == DEBUG_INSN))) |
| 530 | df_insn_rescan (as_a <rtx_insn *> (last_object)); |
| 531 | num_changes = 0; |
| 532 | } |
| 533 | |
| 534 | /* Apply a group of changes previously issued with `validate_change'. |
| 535 | If all changes are valid, call confirm_change_group and return 1, |
| 536 | otherwise, call cancel_changes and return 0. */ |
| 537 | |
| 538 | int |
| 539 | apply_change_group (void) |
| 540 | { |
| 541 | if (verify_changes (0)) |
| 542 | { |
| 543 | confirm_change_group (); |
| 544 | return 1; |
| 545 | } |
| 546 | else |
| 547 | { |
| 548 | cancel_changes (0); |
| 549 | return 0; |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | |
| 554 | /* Return the number of changes so far in the current group. */ |
| 555 | |
| 556 | int |
| 557 | num_validated_changes (void) |
| 558 | { |
| 559 | return num_changes; |
| 560 | } |
| 561 | |
| 562 | /* Retract the changes numbered NUM and up. */ |
| 563 | |
| 564 | void |
| 565 | cancel_changes (int num) |
| 566 | { |
| 567 | gcc_assert (temporarily_undone_changes == 0)((void)(!(temporarily_undone_changes == 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 567, __FUNCTION__), 0 : 0)); |
| 568 | int i; |
| 569 | |
| 570 | /* Back out all the changes. Do this in the opposite order in which |
| 571 | they were made. */ |
| 572 | for (i = num_changes - 1; i >= num; i--) |
| 573 | { |
| 574 | if (changes[i].old_len >= 0) |
| 575 | XVECLEN (*changes[i].loc, 0)(((((*changes[i].loc)->u.fld[0]).rt_rtvec))->num_elem) = changes[i].old_len; |
| 576 | else |
| 577 | *changes[i].loc = changes[i].old; |
| 578 | if (changes[i].object && !MEM_P (changes[i].object)(((enum rtx_code) (changes[i].object)->code) == MEM)) |
| 579 | INSN_CODE (changes[i].object)(((changes[i].object)->u.fld[5]).rt_int) = changes[i].old_code; |
| 580 | } |
| 581 | num_changes = num; |
| 582 | } |
| 583 | |
| 584 | /* Swap the status of change NUM from being applied to not being applied, |
| 585 | or vice versa. */ |
| 586 | |
| 587 | static void |
| 588 | swap_change (int num) |
| 589 | { |
| 590 | if (changes[num].old_len >= 0) |
| 591 | std::swap (XVECLEN (*changes[num].loc, 0)(((((*changes[num].loc)->u.fld[0]).rt_rtvec))->num_elem ), changes[num].old_len); |
| 592 | else |
| 593 | std::swap (*changes[num].loc, changes[num].old); |
| 594 | if (changes[num].object && !MEM_P (changes[num].object)(((enum rtx_code) (changes[num].object)->code) == MEM)) |
| 595 | std::swap (INSN_CODE (changes[num].object)(((changes[num].object)->u.fld[5]).rt_int), changes[num].old_code); |
| 596 | } |
| 597 | |
| 598 | /* Temporarily undo all the changes numbered NUM and up, with a view |
| 599 | to reapplying them later. The next call to the changes machinery |
| 600 | must be: |
| 601 | |
| 602 | redo_changes (NUM) |
| 603 | |
| 604 | otherwise things will end up in an invalid state. */ |
| 605 | |
| 606 | void |
| 607 | temporarily_undo_changes (int num) |
| 608 | { |
| 609 | gcc_assert (temporarily_undone_changes == 0 && num <= num_changes)((void)(!(temporarily_undone_changes == 0 && num <= num_changes) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 609, __FUNCTION__), 0 : 0)); |
| 610 | for (int i = num_changes - 1; i >= num; i--) |
| 611 | swap_change (i); |
| 612 | temporarily_undone_changes = num_changes - num; |
| 613 | } |
| 614 | |
| 615 | /* Redo the changes that were temporarily undone by: |
| 616 | |
| 617 | temporarily_undo_changes (NUM). */ |
| 618 | |
| 619 | void |
| 620 | redo_changes (int num) |
| 621 | { |
| 622 | gcc_assert (temporarily_undone_changes == num_changes - num)((void)(!(temporarily_undone_changes == num_changes - num) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 622, __FUNCTION__), 0 : 0)); |
| 623 | for (int i = num; i < num_changes; ++i) |
| 624 | swap_change (i); |
| 625 | temporarily_undone_changes = 0; |
| 626 | } |
| 627 | |
| 628 | /* Reduce conditional compilation elsewhere. */ |
| 629 | /* A subroutine of validate_replace_rtx_1 that tries to simplify the resulting |
| 630 | rtx. */ |
| 631 | |
| 632 | static void |
| 633 | simplify_while_replacing (rtx *loc, rtx to, rtx_insn *object, |
| 634 | machine_mode op0_mode) |
| 635 | { |
| 636 | rtx x = *loc; |
| 637 | enum rtx_code code = GET_CODE (x)((enum rtx_code) (x)->code); |
| 638 | rtx new_rtx = NULL_RTX(rtx) 0; |
| 639 | scalar_int_mode is_mode; |
| 640 | |
| 641 | if (SWAPPABLE_OPERANDS_P (x)((1 << (rtx_class[(int) (((enum rtx_code) (x)->code) )])) & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE ) | (1 << RTX_COMPARE))) |
| 642 | && swap_commutative_operands_p (XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx))) |
| 643 | { |
| 644 | validate_unshare_change (object, loc, |
| 645 | gen_rtx_fmt_ee (COMMUTATIVE_ARITH_P (x) ? codegen_rtx_fmt_ee_stat ((((rtx_class[(int) (((enum rtx_code) (x) ->code))]) == RTX_COMM_ARITH) ? code : swap_condition (code )), (((machine_mode) (x)->mode)), ((((x)->u.fld[1]).rt_rtx )), ((((x)->u.fld[0]).rt_rtx)) ) |
| 646 | : swap_condition (code),gen_rtx_fmt_ee_stat ((((rtx_class[(int) (((enum rtx_code) (x) ->code))]) == RTX_COMM_ARITH) ? code : swap_condition (code )), (((machine_mode) (x)->mode)), ((((x)->u.fld[1]).rt_rtx )), ((((x)->u.fld[0]).rt_rtx)) ) |
| 647 | GET_MODE (x), XEXP (x, 1),gen_rtx_fmt_ee_stat ((((rtx_class[(int) (((enum rtx_code) (x) ->code))]) == RTX_COMM_ARITH) ? code : swap_condition (code )), (((machine_mode) (x)->mode)), ((((x)->u.fld[1]).rt_rtx )), ((((x)->u.fld[0]).rt_rtx)) ) |
| 648 | XEXP (x, 0))gen_rtx_fmt_ee_stat ((((rtx_class[(int) (((enum rtx_code) (x) ->code))]) == RTX_COMM_ARITH) ? code : swap_condition (code )), (((machine_mode) (x)->mode)), ((((x)->u.fld[1]).rt_rtx )), ((((x)->u.fld[0]).rt_rtx)) ), 1); |
| 649 | x = *loc; |
| 650 | code = GET_CODE (x)((enum rtx_code) (x)->code); |
| 651 | } |
| 652 | |
| 653 | /* Canonicalize arithmetics with all constant operands. */ |
| 654 | switch (GET_RTX_CLASS (code)(rtx_class[(int) (code)])) |
| 655 | { |
| 656 | case RTX_UNARY: |
| 657 | if (CONSTANT_P (XEXP (x, 0))((rtx_class[(int) (((enum rtx_code) ((((x)->u.fld[0]).rt_rtx ))->code))]) == RTX_CONST_OBJ)) |
| 658 | new_rtx = simplify_unary_operation (code, GET_MODE (x)((machine_mode) (x)->mode), XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), |
| 659 | op0_mode); |
| 660 | break; |
| 661 | case RTX_COMM_ARITH: |
| 662 | case RTX_BIN_ARITH: |
| 663 | if (CONSTANT_P (XEXP (x, 0))((rtx_class[(int) (((enum rtx_code) ((((x)->u.fld[0]).rt_rtx ))->code))]) == RTX_CONST_OBJ) && CONSTANT_P (XEXP (x, 1))((rtx_class[(int) (((enum rtx_code) ((((x)->u.fld[1]).rt_rtx ))->code))]) == RTX_CONST_OBJ)) |
| 664 | new_rtx = simplify_binary_operation (code, GET_MODE (x)((machine_mode) (x)->mode), XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), |
| 665 | XEXP (x, 1)(((x)->u.fld[1]).rt_rtx)); |
| 666 | break; |
| 667 | case RTX_COMPARE: |
| 668 | case RTX_COMM_COMPARE: |
| 669 | if (CONSTANT_P (XEXP (x, 0))((rtx_class[(int) (((enum rtx_code) ((((x)->u.fld[0]).rt_rtx ))->code))]) == RTX_CONST_OBJ) && CONSTANT_P (XEXP (x, 1))((rtx_class[(int) (((enum rtx_code) ((((x)->u.fld[1]).rt_rtx ))->code))]) == RTX_CONST_OBJ)) |
| 670 | new_rtx = simplify_relational_operation (code, GET_MODE (x)((machine_mode) (x)->mode), op0_mode, |
| 671 | XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx)); |
| 672 | break; |
| 673 | default: |
| 674 | break; |
| 675 | } |
| 676 | if (new_rtx) |
| 677 | { |
| 678 | validate_change (object, loc, new_rtx, 1); |
| 679 | return; |
| 680 | } |
| 681 | |
| 682 | switch (code) |
| 683 | { |
| 684 | case PLUS: |
| 685 | /* If we have a PLUS whose second operand is now a CONST_INT, use |
| 686 | simplify_gen_binary to try to simplify it. |
| 687 | ??? We may want later to remove this, once simplification is |
| 688 | separated from this function. */ |
| 689 | if (CONST_INT_P (XEXP (x, 1))(((enum rtx_code) ((((x)->u.fld[1]).rt_rtx))->code) == CONST_INT ) && XEXP (x, 1)(((x)->u.fld[1]).rt_rtx) == to) |
| 690 | validate_change (object, loc, |
| 691 | simplify_gen_binary |
| 692 | (PLUS, GET_MODE (x)((machine_mode) (x)->mode), XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx)), 1); |
| 693 | break; |
| 694 | case MINUS: |
| 695 | if (CONST_SCALAR_INT_P (XEXP (x, 1))((((enum rtx_code) ((((x)->u.fld[1]).rt_rtx))->code) == CONST_INT) || (((enum rtx_code) ((((x)->u.fld[1]).rt_rtx) )->code) == CONST_WIDE_INT))) |
| 696 | validate_change (object, loc, |
| 697 | simplify_gen_binary |
| 698 | (PLUS, GET_MODE (x)((machine_mode) (x)->mode), XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), |
| 699 | simplify_gen_unary (NEG, |
| 700 | GET_MODE (x)((machine_mode) (x)->mode), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx), |
| 701 | GET_MODE (x)((machine_mode) (x)->mode))), 1); |
| 702 | break; |
| 703 | case ZERO_EXTEND: |
| 704 | case SIGN_EXTEND: |
| 705 | if (GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode) == VOIDmode((void) 0, E_VOIDmode)) |
| 706 | { |
| 707 | new_rtx = simplify_gen_unary (code, GET_MODE (x)((machine_mode) (x)->mode), XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), |
| 708 | op0_mode); |
| 709 | /* If any of the above failed, substitute in something that |
| 710 | we know won't be recognized. */ |
| 711 | if (!new_rtx) |
| 712 | new_rtx = gen_rtx_CLOBBER (GET_MODE (x), const0_rtx)gen_rtx_fmt_e_stat ((CLOBBER), ((((machine_mode) (x)->mode ))), (((const_int_rtx[64]))) ); |
| 713 | validate_change (object, loc, new_rtx, 1); |
| 714 | } |
| 715 | break; |
| 716 | case SUBREG: |
| 717 | /* All subregs possible to simplify should be simplified. */ |
| 718 | new_rtx = simplify_subreg (GET_MODE (x)((machine_mode) (x)->mode), SUBREG_REG (x)(((x)->u.fld[0]).rt_rtx), op0_mode, |
| 719 | SUBREG_BYTE (x)(((x)->u.fld[1]).rt_subreg)); |
| 720 | |
| 721 | /* Subregs of VOIDmode operands are incorrect. */ |
| 722 | if (!new_rtx && GET_MODE (SUBREG_REG (x))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode) == VOIDmode((void) 0, E_VOIDmode)) |
| 723 | new_rtx = gen_rtx_CLOBBER (GET_MODE (x), const0_rtx)gen_rtx_fmt_e_stat ((CLOBBER), ((((machine_mode) (x)->mode ))), (((const_int_rtx[64]))) ); |
| 724 | if (new_rtx) |
| 725 | validate_change (object, loc, new_rtx, 1); |
| 726 | break; |
| 727 | case ZERO_EXTRACT: |
| 728 | case SIGN_EXTRACT: |
| 729 | /* If we are replacing a register with memory, try to change the memory |
| 730 | to be the mode required for memory in extract operations (this isn't |
| 731 | likely to be an insertion operation; if it was, nothing bad will |
| 732 | happen, we might just fail in some cases). */ |
| 733 | |
| 734 | if (MEM_P (XEXP (x, 0))(((enum rtx_code) ((((x)->u.fld[0]).rt_rtx))->code) == MEM ) |
| 735 | && is_a <scalar_int_mode> (GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode), &is_mode) |
| 736 | && CONST_INT_P (XEXP (x, 1))(((enum rtx_code) ((((x)->u.fld[1]).rt_rtx))->code) == CONST_INT ) |
| 737 | && CONST_INT_P (XEXP (x, 2))(((enum rtx_code) ((((x)->u.fld[2]).rt_rtx))->code) == CONST_INT ) |
| 738 | && !mode_dependent_address_p (XEXP (XEXP (x, 0), 0)((((((x)->u.fld[0]).rt_rtx))->u.fld[0]).rt_rtx), |
| 739 | MEM_ADDR_SPACE (XEXP (x, 0))(get_mem_attrs ((((x)->u.fld[0]).rt_rtx))->addrspace)) |
| 740 | && !MEM_VOLATILE_P (XEXP (x, 0))(__extension__ ({ __typeof (((((x)->u.fld[0]).rt_rtx))) const _rtx = (((((x)->u.fld[0]).rt_rtx))); if (((enum rtx_code) (_rtx)->code) != MEM && ((enum rtx_code) (_rtx)-> code) != ASM_OPERANDS && ((enum rtx_code) (_rtx)-> code) != ASM_INPUT) rtl_check_failed_flag ("MEM_VOLATILE_P", _rtx , "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 740, __FUNCTION__); _rtx; })->volatil)) |
| 741 | { |
| 742 | int pos = INTVAL (XEXP (x, 2))(((((x)->u.fld[2]).rt_rtx))->u.hwint[0]); |
| 743 | machine_mode new_mode = is_mode; |
| 744 | if (GET_CODE (x)((enum rtx_code) (x)->code) == ZERO_EXTRACT && targetm.have_extzv ()) |
| 745 | new_mode = insn_data[targetm.code_for_extzv].operand[1].mode; |
| 746 | else if (GET_CODE (x)((enum rtx_code) (x)->code) == SIGN_EXTRACT && targetm.have_extv ()) |
| 747 | new_mode = insn_data[targetm.code_for_extv].operand[1].mode; |
| 748 | scalar_int_mode wanted_mode = (new_mode == VOIDmode((void) 0, E_VOIDmode) |
| 749 | ? word_mode |
| 750 | : as_a <scalar_int_mode> (new_mode)); |
| 751 | |
| 752 | /* If we have a narrower mode, we can do something. */ |
| 753 | if (GET_MODE_SIZE (wanted_mode) < GET_MODE_SIZE (is_mode)) |
| 754 | { |
| 755 | int offset = pos / BITS_PER_UNIT(8); |
| 756 | rtx newmem; |
| 757 | |
| 758 | /* If the bytes and bits are counted differently, we |
| 759 | must adjust the offset. */ |
| 760 | if (BYTES_BIG_ENDIAN0 != BITS_BIG_ENDIAN0) |
| 761 | offset = |
| 762 | (GET_MODE_SIZE (is_mode) - GET_MODE_SIZE (wanted_mode) - |
| 763 | offset); |
| 764 | |
| 765 | gcc_assert (GET_MODE_PRECISION (wanted_mode)((void)(!(GET_MODE_PRECISION (wanted_mode) == GET_MODE_BITSIZE (wanted_mode)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 766, __FUNCTION__), 0 : 0)) |
| 766 | == GET_MODE_BITSIZE (wanted_mode))((void)(!(GET_MODE_PRECISION (wanted_mode) == GET_MODE_BITSIZE (wanted_mode)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 766, __FUNCTION__), 0 : 0)); |
| 767 | pos %= GET_MODE_BITSIZE (wanted_mode); |
| 768 | |
| 769 | newmem = adjust_address_nv (XEXP (x, 0), wanted_mode, offset)adjust_address_1 ((((x)->u.fld[0]).rt_rtx), wanted_mode, offset , 0, 1, 0, 0); |
| 770 | |
| 771 | validate_change (object, &XEXP (x, 2)(((x)->u.fld[2]).rt_rtx), GEN_INT (pos)gen_rtx_CONST_INT (((void) 0, E_VOIDmode), (pos)), 1); |
| 772 | validate_change (object, &XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), newmem, 1); |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | break; |
| 777 | |
| 778 | default: |
| 779 | break; |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | /* Replace every occurrence of FROM in X with TO. Mark each change with |
| 784 | validate_change passing OBJECT. */ |
| 785 | |
| 786 | static void |
| 787 | validate_replace_rtx_1 (rtx *loc, rtx from, rtx to, rtx_insn *object, |
| 788 | bool simplify) |
| 789 | { |
| 790 | int i, j; |
| 791 | const char *fmt; |
| 792 | rtx x = *loc; |
| 793 | enum rtx_code code; |
| 794 | machine_mode op0_mode = VOIDmode((void) 0, E_VOIDmode); |
| 795 | int prev_changes = num_changes; |
| 796 | |
| 797 | if (!x) |
| 798 | return; |
| 799 | |
| 800 | code = GET_CODE (x)((enum rtx_code) (x)->code); |
| 801 | fmt = GET_RTX_FORMAT (code)(rtx_format[(int) (code)]); |
| 802 | if (fmt[0] == 'e') |
| 803 | op0_mode = GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode); |
| 804 | |
| 805 | /* X matches FROM if it is the same rtx or they are both referring to the |
| 806 | same register in the same mode. Avoid calling rtx_equal_p unless the |
| 807 | operands look similar. */ |
| 808 | |
| 809 | if (x == from |
| 810 | || (REG_P (x)(((enum rtx_code) (x)->code) == REG) && REG_P (from)(((enum rtx_code) (from)->code) == REG) |
| 811 | && GET_MODE (x)((machine_mode) (x)->mode) == GET_MODE (from)((machine_mode) (from)->mode) |
| 812 | && REGNO (x)(rhs_regno(x)) == REGNO (from)(rhs_regno(from))) |
| 813 | || (GET_CODE (x)((enum rtx_code) (x)->code) == GET_CODE (from)((enum rtx_code) (from)->code) && GET_MODE (x)((machine_mode) (x)->mode) == GET_MODE (from)((machine_mode) (from)->mode) |
| 814 | && rtx_equal_p (x, from))) |
| 815 | { |
| 816 | validate_unshare_change (object, loc, to, 1); |
| 817 | return; |
| 818 | } |
| 819 | |
| 820 | /* Call ourself recursively to perform the replacements. |
| 821 | We must not replace inside already replaced expression, otherwise we |
| 822 | get infinite recursion for replacements like (reg X)->(subreg (reg X)) |
| 823 | so we must special case shared ASM_OPERANDS. */ |
| 824 | |
| 825 | if (GET_CODE (x)((enum rtx_code) (x)->code) == PARALLEL) |
| 826 | { |
| 827 | for (j = XVECLEN (x, 0)(((((x)->u.fld[0]).rt_rtvec))->num_elem) - 1; j >= 0; j--) |
| 828 | { |
| 829 | if (j && GET_CODE (XVECEXP (x, 0, j))((enum rtx_code) ((((((x)->u.fld[0]).rt_rtvec))->elem[j ]))->code) == SET |
| 830 | && GET_CODE (SET_SRC (XVECEXP (x, 0, j)))((enum rtx_code) (((((((((x)->u.fld[0]).rt_rtvec))->elem [j]))->u.fld[1]).rt_rtx))->code) == ASM_OPERANDS) |
| 831 | { |
| 832 | /* Verify that operands are really shared. */ |
| 833 | gcc_assert (ASM_OPERANDS_INPUT_VEC (SET_SRC (XVECEXP (x, 0, 0)))((void)(!((((((((((((x)->u.fld[0]).rt_rtvec))->elem[0]) )->u.fld[1]).rt_rtx))->u.fld[3]).rt_rtvec) == ((((((((( ((x)->u.fld[0]).rt_rtvec))->elem[j]))->u.fld[1]).rt_rtx ))->u.fld[3]).rt_rtvec)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 835, __FUNCTION__), 0 : 0)) |
| 834 | == ASM_OPERANDS_INPUT_VEC (SET_SRC (XVECEXP((void)(!((((((((((((x)->u.fld[0]).rt_rtvec))->elem[0]) )->u.fld[1]).rt_rtx))->u.fld[3]).rt_rtvec) == ((((((((( ((x)->u.fld[0]).rt_rtvec))->elem[j]))->u.fld[1]).rt_rtx ))->u.fld[3]).rt_rtvec)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 835, __FUNCTION__), 0 : 0)) |
| 835 | (x, 0, j))))((void)(!((((((((((((x)->u.fld[0]).rt_rtvec))->elem[0]) )->u.fld[1]).rt_rtx))->u.fld[3]).rt_rtvec) == ((((((((( ((x)->u.fld[0]).rt_rtvec))->elem[j]))->u.fld[1]).rt_rtx ))->u.fld[3]).rt_rtvec)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 835, __FUNCTION__), 0 : 0)); |
| 836 | validate_replace_rtx_1 (&SET_DEST (XVECEXP (x, 0, j))((((((((x)->u.fld[0]).rt_rtvec))->elem[j]))->u.fld[0 ]).rt_rtx), |
| 837 | from, to, object, simplify); |
| 838 | } |
| 839 | else |
| 840 | validate_replace_rtx_1 (&XVECEXP (x, 0, j)(((((x)->u.fld[0]).rt_rtvec))->elem[j]), from, to, object, |
| 841 | simplify); |
| 842 | } |
| 843 | } |
| 844 | else |
| 845 | for (i = GET_RTX_LENGTH (code)(rtx_length[(int) (code)]) - 1; i >= 0; i--) |
| 846 | { |
| 847 | if (fmt[i] == 'e') |
| 848 | validate_replace_rtx_1 (&XEXP (x, i)(((x)->u.fld[i]).rt_rtx), from, to, object, simplify); |
| 849 | else if (fmt[i] == 'E') |
| 850 | for (j = XVECLEN (x, i)(((((x)->u.fld[i]).rt_rtvec))->num_elem) - 1; j >= 0; j--) |
| 851 | validate_replace_rtx_1 (&XVECEXP (x, i, j)(((((x)->u.fld[i]).rt_rtvec))->elem[j]), from, to, object, |
| 852 | simplify); |
| 853 | } |
| 854 | |
| 855 | /* If we didn't substitute, there is nothing more to do. */ |
| 856 | if (num_changes == prev_changes) |
| 857 | return; |
| 858 | |
| 859 | /* ??? The regmove is no more, so is this aberration still necessary? */ |
| 860 | /* Allow substituted expression to have different mode. This is used by |
| 861 | regmove to change mode of pseudo register. */ |
| 862 | if (fmt[0] == 'e' && GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode) != VOIDmode((void) 0, E_VOIDmode)) |
| 863 | op0_mode = GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode); |
| 864 | |
| 865 | /* Do changes needed to keep rtx consistent. Don't do any other |
| 866 | simplifications, as it is not our job. */ |
| 867 | if (simplify) |
| 868 | simplify_while_replacing (loc, to, object, op0_mode); |
| 869 | } |
| 870 | |
| 871 | /* Try replacing every occurrence of FROM in subexpression LOC of INSN |
| 872 | with TO. After all changes have been made, validate by seeing |
| 873 | if INSN is still valid. */ |
| 874 | |
| 875 | int |
| 876 | validate_replace_rtx_subexp (rtx from, rtx to, rtx_insn *insn, rtx *loc) |
| 877 | { |
| 878 | validate_replace_rtx_1 (loc, from, to, insn, true); |
| 879 | return apply_change_group (); |
| 880 | } |
| 881 | |
| 882 | /* Try replacing every occurrence of FROM in INSN with TO. After all |
| 883 | changes have been made, validate by seeing if INSN is still valid. */ |
| 884 | |
| 885 | int |
| 886 | validate_replace_rtx (rtx from, rtx to, rtx_insn *insn) |
| 887 | { |
| 888 | validate_replace_rtx_1 (&PATTERN (insn), from, to, insn, true); |
| 889 | return apply_change_group (); |
| 890 | } |
| 891 | |
| 892 | /* Try replacing every occurrence of FROM in WHERE with TO. Assume that WHERE |
| 893 | is a part of INSN. After all changes have been made, validate by seeing if |
| 894 | INSN is still valid. |
| 895 | validate_replace_rtx (from, to, insn) is equivalent to |
| 896 | validate_replace_rtx_part (from, to, &PATTERN (insn), insn). */ |
| 897 | |
| 898 | int |
| 899 | validate_replace_rtx_part (rtx from, rtx to, rtx *where, rtx_insn *insn) |
| 900 | { |
| 901 | validate_replace_rtx_1 (where, from, to, insn, true); |
| 902 | return apply_change_group (); |
| 903 | } |
| 904 | |
| 905 | /* Same as above, but do not simplify rtx afterwards. */ |
| 906 | int |
| 907 | validate_replace_rtx_part_nosimplify (rtx from, rtx to, rtx *where, |
| 908 | rtx_insn *insn) |
| 909 | { |
| 910 | validate_replace_rtx_1 (where, from, to, insn, false); |
| 911 | return apply_change_group (); |
| 912 | |
| 913 | } |
| 914 | |
| 915 | /* Try replacing every occurrence of FROM in INSN with TO. This also |
| 916 | will replace in REG_EQUAL and REG_EQUIV notes. */ |
| 917 | |
| 918 | void |
| 919 | validate_replace_rtx_group (rtx from, rtx to, rtx_insn *insn) |
| 920 | { |
| 921 | rtx note; |
| 922 | validate_replace_rtx_1 (&PATTERN (insn), from, to, insn, true); |
| 923 | for (note = REG_NOTES (insn)(((insn)->u.fld[6]).rt_rtx); note; note = XEXP (note, 1)(((note)->u.fld[1]).rt_rtx)) |
| 924 | if (REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode)) == REG_EQUAL |
| 925 | || REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode)) == REG_EQUIV) |
| 926 | validate_replace_rtx_1 (&XEXP (note, 0)(((note)->u.fld[0]).rt_rtx), from, to, insn, true); |
| 927 | } |
| 928 | |
| 929 | /* Function called by note_uses to replace used subexpressions. */ |
| 930 | struct validate_replace_src_data |
| 931 | { |
| 932 | rtx from; /* Old RTX */ |
| 933 | rtx to; /* New RTX */ |
| 934 | rtx_insn *insn; /* Insn in which substitution is occurring. */ |
| 935 | }; |
| 936 | |
| 937 | static void |
| 938 | validate_replace_src_1 (rtx *x, void *data) |
| 939 | { |
| 940 | struct validate_replace_src_data *d |
| 941 | = (struct validate_replace_src_data *) data; |
| 942 | |
| 943 | validate_replace_rtx_1 (x, d->from, d->to, d->insn, true); |
| 944 | } |
| 945 | |
| 946 | /* Try replacing every occurrence of FROM in INSN with TO, avoiding |
| 947 | SET_DESTs. */ |
| 948 | |
| 949 | void |
| 950 | validate_replace_src_group (rtx from, rtx to, rtx_insn *insn) |
| 951 | { |
| 952 | struct validate_replace_src_data d; |
| 953 | |
| 954 | d.from = from; |
| 955 | d.to = to; |
| 956 | d.insn = insn; |
| 957 | note_uses (&PATTERN (insn), validate_replace_src_1, &d); |
| 958 | } |
| 959 | |
| 960 | /* Try simplify INSN. |
| 961 | Invoke simplify_rtx () on every SET_SRC and SET_DEST inside the INSN's |
| 962 | pattern and return true if something was simplified. */ |
| 963 | |
| 964 | bool |
| 965 | validate_simplify_insn (rtx_insn *insn) |
| 966 | { |
| 967 | int i; |
| 968 | rtx pat = NULLnullptr; |
| 969 | rtx newpat = NULLnullptr; |
| 970 | |
| 971 | pat = PATTERN (insn); |
| 972 | |
| 973 | if (GET_CODE (pat)((enum rtx_code) (pat)->code) == SET) |
| 974 | { |
| 975 | newpat = simplify_rtx (SET_SRC (pat)(((pat)->u.fld[1]).rt_rtx)); |
| 976 | if (newpat && !rtx_equal_p (SET_SRC (pat)(((pat)->u.fld[1]).rt_rtx), newpat)) |
| 977 | validate_change (insn, &SET_SRC (pat)(((pat)->u.fld[1]).rt_rtx), newpat, 1); |
| 978 | newpat = simplify_rtx (SET_DEST (pat)(((pat)->u.fld[0]).rt_rtx)); |
| 979 | if (newpat && !rtx_equal_p (SET_DEST (pat)(((pat)->u.fld[0]).rt_rtx), newpat)) |
| 980 | validate_change (insn, &SET_DEST (pat)(((pat)->u.fld[0]).rt_rtx), newpat, 1); |
| 981 | } |
| 982 | else if (GET_CODE (pat)((enum rtx_code) (pat)->code) == PARALLEL) |
| 983 | for (i = 0; i < XVECLEN (pat, 0)(((((pat)->u.fld[0]).rt_rtvec))->num_elem); i++) |
| 984 | { |
| 985 | rtx s = XVECEXP (pat, 0, i)(((((pat)->u.fld[0]).rt_rtvec))->elem[i]); |
| 986 | |
| 987 | if (GET_CODE (XVECEXP (pat, 0, i))((enum rtx_code) ((((((pat)->u.fld[0]).rt_rtvec))->elem [i]))->code) == SET) |
| 988 | { |
| 989 | newpat = simplify_rtx (SET_SRC (s)(((s)->u.fld[1]).rt_rtx)); |
| 990 | if (newpat && !rtx_equal_p (SET_SRC (s)(((s)->u.fld[1]).rt_rtx), newpat)) |
| 991 | validate_change (insn, &SET_SRC (s)(((s)->u.fld[1]).rt_rtx), newpat, 1); |
| 992 | newpat = simplify_rtx (SET_DEST (s)(((s)->u.fld[0]).rt_rtx)); |
| 993 | if (newpat && !rtx_equal_p (SET_DEST (s)(((s)->u.fld[0]).rt_rtx), newpat)) |
| 994 | validate_change (insn, &SET_DEST (s)(((s)->u.fld[0]).rt_rtx), newpat, 1); |
| 995 | } |
| 996 | } |
| 997 | return ((num_changes_pending () > 0) && (apply_change_group () > 0)); |
| 998 | } |
| 999 | |
| 1000 | /* Try to process the address of memory expression MEM. Return true on |
| 1001 | success; leave the caller to clean up on failure. */ |
| 1002 | |
| 1003 | bool |
| 1004 | insn_propagation::apply_to_mem_1 (rtx mem) |
| 1005 | { |
| 1006 | auto old_num_changes = num_validated_changes (); |
| 1007 | mem_depth += 1; |
| 1008 | bool res = apply_to_rvalue_1 (&XEXP (mem, 0)(((mem)->u.fld[0]).rt_rtx)); |
| 1009 | mem_depth -= 1; |
| 1010 | if (!res) |
| 1011 | return false; |
| 1012 | |
| 1013 | if (old_num_changes != num_validated_changes () |
| 1014 | && should_check_mems |
| 1015 | && !check_mem (old_num_changes, mem)) |
| 1016 | return false; |
| 1017 | |
| 1018 | return true; |
| 1019 | } |
| 1020 | |
| 1021 | /* Try to process the rvalue expression at *LOC. Return true on success; |
| 1022 | leave the caller to clean up on failure. */ |
| 1023 | |
| 1024 | bool |
| 1025 | insn_propagation::apply_to_rvalue_1 (rtx *loc) |
| 1026 | { |
| 1027 | rtx x = *loc; |
| 1028 | enum rtx_code code = GET_CODE (x)((enum rtx_code) (x)->code); |
| 1029 | machine_mode mode = GET_MODE (x)((machine_mode) (x)->mode); |
| 1030 | |
| 1031 | auto old_num_changes = num_validated_changes (); |
| 1032 | if (from && GET_CODE (x)((enum rtx_code) (x)->code) == GET_CODE (from)((enum rtx_code) (from)->code) && rtx_equal_p (x, from)) |
| 1033 | { |
| 1034 | /* Don't replace register asms in asm statements; we mustn't |
| 1035 | change the user's register allocation. */ |
| 1036 | if (REG_P (x)(((enum rtx_code) (x)->code) == REG) |
| 1037 | && HARD_REGISTER_P (x)((((rhs_regno(x))) < 76)) |
| 1038 | && register_asm_p (x) |
| 1039 | && asm_noperands (PATTERN (insn)) > 0) |
| 1040 | return false; |
| 1041 | |
| 1042 | if (should_unshare) |
| 1043 | validate_unshare_change (insn, loc, to, 1); |
| 1044 | else |
| 1045 | validate_change (insn, loc, to, 1); |
| 1046 | if (mem_depth && !REG_P (to)(((enum rtx_code) (to)->code) == REG) && !CONSTANT_P (to)((rtx_class[(int) (((enum rtx_code) (to)->code))]) == RTX_CONST_OBJ )) |
| 1047 | { |
| 1048 | /* We're substituting into an address, but TO will have the |
| 1049 | form expected outside an address. Canonicalize it if |
| 1050 | necessary. */ |
| 1051 | insn_propagation subprop (insn); |
| 1052 | subprop.mem_depth += 1; |
| 1053 | if (!subprop.apply_to_rvalue (loc)) |
| 1054 | gcc_unreachable ()(fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1054, __FUNCTION__)); |
| 1055 | if (should_unshare |
| 1056 | && num_validated_changes () != old_num_changes + 1) |
| 1057 | { |
| 1058 | /* TO is owned by someone else, so create a copy and |
| 1059 | return TO to its original form. */ |
| 1060 | rtx to = copy_rtx (*loc); |
| 1061 | cancel_changes (old_num_changes); |
| 1062 | validate_change (insn, loc, to, 1); |
| 1063 | } |
| 1064 | } |
| 1065 | num_replacements += 1; |
| 1066 | should_unshare = true; |
| 1067 | result_flags |= UNSIMPLIFIED; |
| 1068 | return true; |
| 1069 | } |
| 1070 | |
| 1071 | /* Recursively apply the substitution and see if we can simplify |
| 1072 | the result. This specifically shouldn't use simplify_gen_* for |
| 1073 | speculative simplifications, since we want to avoid generating new |
| 1074 | expressions where possible. */ |
| 1075 | auto old_result_flags = result_flags; |
| 1076 | rtx newx = NULL_RTX(rtx) 0; |
| 1077 | bool recurse_p = false; |
| 1078 | switch (GET_RTX_CLASS (code)(rtx_class[(int) (code)])) |
| 1079 | { |
| 1080 | case RTX_UNARY: |
| 1081 | { |
| 1082 | machine_mode op0_mode = GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode); |
| 1083 | if (!apply_to_rvalue_1 (&XEXP (x, 0)(((x)->u.fld[0]).rt_rtx))) |
| 1084 | return false; |
| 1085 | if (from && old_num_changes == num_validated_changes ()) |
| 1086 | return true; |
| 1087 | |
| 1088 | newx = simplify_unary_operation (code, mode, XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), op0_mode); |
| 1089 | break; |
| 1090 | } |
| 1091 | |
| 1092 | case RTX_BIN_ARITH: |
| 1093 | case RTX_COMM_ARITH: |
| 1094 | { |
| 1095 | if (!apply_to_rvalue_1 (&XEXP (x, 0)(((x)->u.fld[0]).rt_rtx)) |
| 1096 | || !apply_to_rvalue_1 (&XEXP (x, 1)(((x)->u.fld[1]).rt_rtx))) |
| 1097 | return false; |
| 1098 | if (from && old_num_changes == num_validated_changes ()) |
| 1099 | return true; |
| 1100 | |
| 1101 | if (GET_RTX_CLASS (code)(rtx_class[(int) (code)]) == RTX_COMM_ARITH |
| 1102 | && swap_commutative_operands_p (XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx))) |
| 1103 | newx = simplify_gen_binary (code, mode, XEXP (x, 1)(((x)->u.fld[1]).rt_rtx), XEXP (x, 0)(((x)->u.fld[0]).rt_rtx)); |
| 1104 | else |
| 1105 | newx = simplify_binary_operation (code, mode, |
| 1106 | XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx)); |
| 1107 | break; |
| 1108 | } |
| 1109 | |
| 1110 | case RTX_COMPARE: |
| 1111 | case RTX_COMM_COMPARE: |
| 1112 | { |
| 1113 | machine_mode op_mode = (GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode) != VOIDmode((void) 0, E_VOIDmode) |
| 1114 | ? GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode) |
| 1115 | : GET_MODE (XEXP (x, 1))((machine_mode) ((((x)->u.fld[1]).rt_rtx))->mode)); |
| 1116 | if (!apply_to_rvalue_1 (&XEXP (x, 0)(((x)->u.fld[0]).rt_rtx)) |
| 1117 | || !apply_to_rvalue_1 (&XEXP (x, 1)(((x)->u.fld[1]).rt_rtx))) |
| 1118 | return false; |
| 1119 | if (from && old_num_changes == num_validated_changes ()) |
| 1120 | return true; |
| 1121 | |
| 1122 | newx = simplify_relational_operation (code, mode, op_mode, |
| 1123 | XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx)); |
| 1124 | break; |
| 1125 | } |
| 1126 | |
| 1127 | case RTX_TERNARY: |
| 1128 | case RTX_BITFIELD_OPS: |
| 1129 | { |
| 1130 | machine_mode op0_mode = GET_MODE (XEXP (x, 0))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode); |
| 1131 | if (!apply_to_rvalue_1 (&XEXP (x, 0)(((x)->u.fld[0]).rt_rtx)) |
| 1132 | || !apply_to_rvalue_1 (&XEXP (x, 1)(((x)->u.fld[1]).rt_rtx)) |
| 1133 | || !apply_to_rvalue_1 (&XEXP (x, 2)(((x)->u.fld[2]).rt_rtx))) |
| 1134 | return false; |
| 1135 | if (from && old_num_changes == num_validated_changes ()) |
| 1136 | return true; |
| 1137 | |
| 1138 | newx = simplify_ternary_operation (code, mode, op0_mode, |
| 1139 | XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), XEXP (x, 1)(((x)->u.fld[1]).rt_rtx), |
| 1140 | XEXP (x, 2)(((x)->u.fld[2]).rt_rtx)); |
| 1141 | break; |
| 1142 | } |
| 1143 | |
| 1144 | case RTX_EXTRA: |
| 1145 | if (code == SUBREG) |
| 1146 | { |
| 1147 | machine_mode inner_mode = GET_MODE (SUBREG_REG (x))((machine_mode) ((((x)->u.fld[0]).rt_rtx))->mode); |
| 1148 | if (!apply_to_rvalue_1 (&SUBREG_REG (x)(((x)->u.fld[0]).rt_rtx))) |
| 1149 | return false; |
| 1150 | if (from && old_num_changes == num_validated_changes ()) |
| 1151 | return true; |
| 1152 | |
| 1153 | rtx inner = SUBREG_REG (x)(((x)->u.fld[0]).rt_rtx); |
| 1154 | newx = simplify_subreg (mode, inner, inner_mode, SUBREG_BYTE (x)(((x)->u.fld[1]).rt_subreg)); |
| 1155 | /* Reject the same cases that simplify_gen_subreg would. */ |
| 1156 | if (!newx |
| 1157 | && (GET_CODE (inner)((enum rtx_code) (inner)->code) == SUBREG |
| 1158 | || GET_CODE (inner)((enum rtx_code) (inner)->code) == CONCAT |
| 1159 | || GET_MODE (inner)((machine_mode) (inner)->mode) == VOIDmode((void) 0, E_VOIDmode) |
| 1160 | || !validate_subreg (mode, inner_mode, |
| 1161 | inner, SUBREG_BYTE (x)(((x)->u.fld[1]).rt_subreg)))) |
| 1162 | { |
| 1163 | failure_reason = "would create an invalid subreg"; |
| 1164 | return false; |
| 1165 | } |
| 1166 | break; |
| 1167 | } |
| 1168 | else |
| 1169 | recurse_p = true; |
| 1170 | break; |
| 1171 | |
| 1172 | case RTX_OBJ: |
| 1173 | if (code == LO_SUM) |
| 1174 | { |
| 1175 | if (!apply_to_rvalue_1 (&XEXP (x, 0)(((x)->u.fld[0]).rt_rtx)) |
| 1176 | || !apply_to_rvalue_1 (&XEXP (x, 1)(((x)->u.fld[1]).rt_rtx))) |
| 1177 | return false; |
| 1178 | if (from && old_num_changes == num_validated_changes ()) |
| 1179 | return true; |
| 1180 | |
| 1181 | /* (lo_sum (high x) y) -> y where x and y have the same base. */ |
| 1182 | rtx op0 = XEXP (x, 0)(((x)->u.fld[0]).rt_rtx); |
| 1183 | rtx op1 = XEXP (x, 1)(((x)->u.fld[1]).rt_rtx); |
| 1184 | if (GET_CODE (op0)((enum rtx_code) (op0)->code) == HIGH) |
| 1185 | { |
| 1186 | rtx base0, base1, offset0, offset1; |
| 1187 | split_const (XEXP (op0, 0)(((op0)->u.fld[0]).rt_rtx), &base0, &offset0); |
| 1188 | split_const (op1, &base1, &offset1); |
| 1189 | if (rtx_equal_p (base0, base1)) |
| 1190 | newx = op1; |
| 1191 | } |
| 1192 | } |
| 1193 | else if (code == REG) |
| 1194 | { |
| 1195 | if (from && REG_P (from)(((enum rtx_code) (from)->code) == REG) && reg_overlap_mentioned_p (x, from)) |
| 1196 | { |
| 1197 | failure_reason = "inexact register overlap"; |
| 1198 | return false; |
| 1199 | } |
| 1200 | } |
| 1201 | else if (code == MEM) |
| 1202 | return apply_to_mem_1 (x); |
| 1203 | else |
| 1204 | recurse_p = true; |
| 1205 | break; |
| 1206 | |
| 1207 | case RTX_CONST_OBJ: |
| 1208 | break; |
| 1209 | |
| 1210 | case RTX_AUTOINC: |
| 1211 | if (from && reg_overlap_mentioned_p (XEXP (x, 0)(((x)->u.fld[0]).rt_rtx), from)) |
| 1212 | { |
| 1213 | failure_reason = "is subject to autoinc"; |
| 1214 | return false; |
| 1215 | } |
| 1216 | recurse_p = true; |
| 1217 | break; |
| 1218 | |
| 1219 | case RTX_MATCH: |
| 1220 | case RTX_INSN: |
| 1221 | gcc_unreachable ()(fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1221, __FUNCTION__)); |
| 1222 | } |
| 1223 | |
| 1224 | if (recurse_p) |
| 1225 | { |
| 1226 | const char *fmt = GET_RTX_FORMAT (code)(rtx_format[(int) (code)]); |
| 1227 | for (int i = 0; fmt[i]; i++) |
| 1228 | switch (fmt[i]) |
| 1229 | { |
| 1230 | case 'E': |
| 1231 | for (int j = 0; j < XVECLEN (x, i)(((((x)->u.fld[i]).rt_rtvec))->num_elem); j++) |
| 1232 | if (!apply_to_rvalue_1 (&XVECEXP (x, i, j)(((((x)->u.fld[i]).rt_rtvec))->elem[j]))) |
| 1233 | return false; |
| 1234 | break; |
| 1235 | |
| 1236 | case 'e': |
| 1237 | if (XEXP (x, i)(((x)->u.fld[i]).rt_rtx) && !apply_to_rvalue_1 (&XEXP (x, i)(((x)->u.fld[i]).rt_rtx))) |
| 1238 | return false; |
| 1239 | break; |
| 1240 | } |
| 1241 | } |
| 1242 | else if (newx && !rtx_equal_p (x, newx)) |
| 1243 | { |
| 1244 | /* All substitutions made by OLD_NUM_CHANGES onwards have been |
| 1245 | simplified. */ |
| 1246 | result_flags = ((result_flags & ~UNSIMPLIFIED) |
| 1247 | | (old_result_flags & UNSIMPLIFIED)); |
| 1248 | |
| 1249 | if (should_note_simplifications) |
| 1250 | note_simplification (old_num_changes, old_result_flags, x, newx); |
| 1251 | |
| 1252 | /* There's no longer any point unsharing the substitutions made |
| 1253 | for subexpressions, since we'll just copy this one instead. */ |
| 1254 | bool unshare = false; |
| 1255 | for (int i = old_num_changes; i < num_changes; ++i) |
| 1256 | { |
| 1257 | unshare |= changes[i].unshare; |
| 1258 | changes[i].unshare = false; |
| 1259 | } |
| 1260 | if (unshare) |
| 1261 | validate_unshare_change (insn, loc, newx, 1); |
| 1262 | else |
| 1263 | validate_change (insn, loc, newx, 1); |
| 1264 | } |
| 1265 | |
| 1266 | return true; |
| 1267 | } |
| 1268 | |
| 1269 | /* Try to process the lvalue expression at *LOC. Return true on success; |
| 1270 | leave the caller to clean up on failure. */ |
| 1271 | |
| 1272 | bool |
| 1273 | insn_propagation::apply_to_lvalue_1 (rtx dest) |
| 1274 | { |
| 1275 | rtx old_dest = dest; |
| 1276 | while (GET_CODE (dest)((enum rtx_code) (dest)->code) == SUBREG |
| 1277 | || GET_CODE (dest)((enum rtx_code) (dest)->code) == ZERO_EXTRACT |
| 1278 | || GET_CODE (dest)((enum rtx_code) (dest)->code) == STRICT_LOW_PART) |
| 1279 | { |
| 1280 | if (GET_CODE (dest)((enum rtx_code) (dest)->code) == ZERO_EXTRACT |
| 1281 | && (!apply_to_rvalue_1 (&XEXP (dest, 1)(((dest)->u.fld[1]).rt_rtx)) |
| 1282 | || !apply_to_rvalue_1 (&XEXP (dest, 2)(((dest)->u.fld[2]).rt_rtx)))) |
| 1283 | return false; |
| 1284 | dest = XEXP (dest, 0)(((dest)->u.fld[0]).rt_rtx); |
| 1285 | } |
| 1286 | |
| 1287 | if (MEM_P (dest)(((enum rtx_code) (dest)->code) == MEM)) |
| 1288 | return apply_to_mem_1 (dest); |
| 1289 | |
| 1290 | /* Check whether the substitution is safe in the presence of this lvalue. */ |
| 1291 | if (!from |
| 1292 | || dest == old_dest |
| 1293 | || !REG_P (dest)(((enum rtx_code) (dest)->code) == REG) |
| 1294 | || !reg_overlap_mentioned_p (dest, from)) |
| 1295 | return true; |
| 1296 | |
| 1297 | if (SUBREG_P (old_dest)(((enum rtx_code) (old_dest)->code) == SUBREG) |
| 1298 | && SUBREG_REG (old_dest)(((old_dest)->u.fld[0]).rt_rtx) == dest |
| 1299 | && !read_modify_subreg_p (old_dest)) |
| 1300 | return true; |
| 1301 | |
| 1302 | failure_reason = "is part of a read-write destination"; |
| 1303 | return false; |
| 1304 | } |
| 1305 | |
| 1306 | /* Try to process the instruction pattern at *LOC. Return true on success; |
| 1307 | leave the caller to clean up on failure. */ |
| 1308 | |
| 1309 | bool |
| 1310 | insn_propagation::apply_to_pattern_1 (rtx *loc) |
| 1311 | { |
| 1312 | rtx body = *loc; |
| 1313 | switch (GET_CODE (body)((enum rtx_code) (body)->code)) |
| 1314 | { |
| 1315 | case COND_EXEC: |
| 1316 | return (apply_to_rvalue_1 (&COND_EXEC_TEST (body)(((body)->u.fld[0]).rt_rtx)) |
| 1317 | && apply_to_pattern_1 (&COND_EXEC_CODE (body)(((body)->u.fld[1]).rt_rtx))); |
| 1318 | |
| 1319 | case PARALLEL: |
| 1320 | { |
| 1321 | int last = XVECLEN (body, 0)(((((body)->u.fld[0]).rt_rtvec))->num_elem) - 1; |
| 1322 | for (int i = 0; i < last; ++i) |
| 1323 | if (!apply_to_pattern_1 (&XVECEXP (body, 0, i)(((((body)->u.fld[0]).rt_rtvec))->elem[i]))) |
| 1324 | return false; |
| 1325 | return apply_to_pattern_1 (&XVECEXP (body, 0, last)(((((body)->u.fld[0]).rt_rtvec))->elem[last])); |
| 1326 | } |
| 1327 | |
| 1328 | case ASM_OPERANDS: |
| 1329 | for (int i = 0, len = ASM_OPERANDS_INPUT_LENGTH (body)(((((body)->u.fld[3]).rt_rtvec))->num_elem); i < len; ++i) |
| 1330 | if (!apply_to_rvalue_1 (&ASM_OPERANDS_INPUT (body, i)(((((body)->u.fld[3]).rt_rtvec))->elem[i]))) |
| 1331 | return false; |
| 1332 | return true; |
| 1333 | |
| 1334 | case CLOBBER: |
| 1335 | return apply_to_lvalue_1 (XEXP (body, 0)(((body)->u.fld[0]).rt_rtx)); |
| 1336 | |
| 1337 | case SET: |
| 1338 | return (apply_to_lvalue_1 (SET_DEST (body)(((body)->u.fld[0]).rt_rtx)) |
| 1339 | && apply_to_rvalue_1 (&SET_SRC (body)(((body)->u.fld[1]).rt_rtx))); |
| 1340 | |
| 1341 | default: |
| 1342 | /* All the other possibilities never store and can use a normal |
| 1343 | rtx walk. This includes: |
| 1344 | |
| 1345 | - USE |
| 1346 | - TRAP_IF |
| 1347 | - PREFETCH |
| 1348 | - UNSPEC |
| 1349 | - UNSPEC_VOLATILE. */ |
| 1350 | return apply_to_rvalue_1 (loc); |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | /* Apply this insn_propagation object's simplification or substitution |
| 1355 | to the instruction pattern at LOC. */ |
| 1356 | |
| 1357 | bool |
| 1358 | insn_propagation::apply_to_pattern (rtx *loc) |
| 1359 | { |
| 1360 | unsigned int num_changes = num_validated_changes (); |
| 1361 | bool res = apply_to_pattern_1 (loc); |
| 1362 | if (!res) |
| 1363 | cancel_changes (num_changes); |
| 1364 | return res; |
| 1365 | } |
| 1366 | |
| 1367 | /* Apply this insn_propagation object's simplification or substitution |
| 1368 | to the rvalue expression at LOC. */ |
| 1369 | |
| 1370 | bool |
| 1371 | insn_propagation::apply_to_rvalue (rtx *loc) |
| 1372 | { |
| 1373 | unsigned int num_changes = num_validated_changes (); |
| 1374 | bool res = apply_to_rvalue_1 (loc); |
| 1375 | if (!res) |
| 1376 | cancel_changes (num_changes); |
| 1377 | return res; |
| 1378 | } |
| 1379 | |
| 1380 | /* Check whether INSN matches a specific alternative of an .md pattern. */ |
| 1381 | |
| 1382 | bool |
| 1383 | valid_insn_p (rtx_insn *insn) |
| 1384 | { |
| 1385 | recog_memoized (insn); |
| 1386 | if (INSN_CODE (insn)(((insn)->u.fld[5]).rt_int) < 0) |
| 1387 | return false; |
| 1388 | extract_insn (insn); |
| 1389 | /* We don't know whether the insn will be in code that is optimized |
| 1390 | for size or speed, so consider all enabled alternatives. */ |
| 1391 | if (!constrain_operands (1, get_enabled_alternatives (insn))) |
| 1392 | return false; |
| 1393 | return true; |
| 1394 | } |
| 1395 | |
| 1396 | /* Return 1 if OP is a valid general operand for machine mode MODE. |
| 1397 | This is either a register reference, a memory reference, |
| 1398 | or a constant. In the case of a memory reference, the address |
| 1399 | is checked for general validity for the target machine. |
| 1400 | |
| 1401 | Register and memory references must have mode MODE in order to be valid, |
| 1402 | but some constants have no machine mode and are valid for any mode. |
| 1403 | |
| 1404 | If MODE is VOIDmode, OP is checked for validity for whatever mode |
| 1405 | it has. |
| 1406 | |
| 1407 | The main use of this function is as a predicate in match_operand |
| 1408 | expressions in the machine description. */ |
| 1409 | |
| 1410 | int |
| 1411 | general_operand (rtx op, machine_mode mode) |
| 1412 | { |
| 1413 | enum rtx_code code = GET_CODE (op)((enum rtx_code) (op)->code); |
| 1414 | |
| 1415 | if (mode == VOIDmode((void) 0, E_VOIDmode)) |
| 1416 | mode = GET_MODE (op)((machine_mode) (op)->mode); |
| 1417 | |
| 1418 | /* Don't accept CONST_INT or anything similar |
| 1419 | if the caller wants something floating. */ |
| 1420 | if (GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode) && mode != VOIDmode((void) 0, E_VOIDmode) |
| 1421 | && GET_MODE_CLASS (mode)((enum mode_class) mode_class[mode]) != MODE_INT |
| 1422 | && GET_MODE_CLASS (mode)((enum mode_class) mode_class[mode]) != MODE_PARTIAL_INT) |
| 1423 | return 0; |
| 1424 | |
| 1425 | if (CONST_INT_P (op)(((enum rtx_code) (op)->code) == CONST_INT) |
| 1426 | && mode != VOIDmode((void) 0, E_VOIDmode) |
| 1427 | && trunc_int_for_mode (INTVAL (op)((op)->u.hwint[0]), mode) != INTVAL (op)((op)->u.hwint[0])) |
| 1428 | return 0; |
| 1429 | |
| 1430 | if (CONSTANT_P (op)((rtx_class[(int) (((enum rtx_code) (op)->code))]) == RTX_CONST_OBJ )) |
| 1431 | return ((GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode) || GET_MODE (op)((machine_mode) (op)->mode) == mode |
| 1432 | || mode == VOIDmode((void) 0, E_VOIDmode)) |
| 1433 | && (! flag_picglobal_options.x_flag_pic || LEGITIMATE_PIC_OPERAND_P (op)legitimate_pic_operand_p (op)) |
| 1434 | && targetm.legitimate_constant_p (mode == VOIDmode((void) 0, E_VOIDmode) |
| 1435 | ? GET_MODE (op)((machine_mode) (op)->mode) |
| 1436 | : mode, op)); |
| 1437 | |
| 1438 | /* Except for certain constants with VOIDmode, already checked for, |
| 1439 | OP's mode must match MODE if MODE specifies a mode. */ |
| 1440 | |
| 1441 | if (GET_MODE (op)((machine_mode) (op)->mode) != mode) |
| 1442 | return 0; |
| 1443 | |
| 1444 | if (code == SUBREG) |
| 1445 | { |
| 1446 | rtx sub = SUBREG_REG (op)(((op)->u.fld[0]).rt_rtx); |
| 1447 | |
| 1448 | #ifdef INSN_SCHEDULING |
| 1449 | /* On machines that have insn scheduling, we want all memory |
| 1450 | reference to be explicit, so outlaw paradoxical SUBREGs. |
| 1451 | However, we must allow them after reload so that they can |
| 1452 | get cleaned up by cleanup_subreg_operands. */ |
| 1453 | if (!reload_completed && MEM_P (sub)(((enum rtx_code) (sub)->code) == MEM) |
| 1454 | && paradoxical_subreg_p (op)) |
| 1455 | return 0; |
| 1456 | #endif |
| 1457 | /* Avoid memories with nonzero SUBREG_BYTE, as offsetting the memory |
| 1458 | may result in incorrect reference. We should simplify all valid |
| 1459 | subregs of MEM anyway. But allow this after reload because we |
| 1460 | might be called from cleanup_subreg_operands. |
| 1461 | |
| 1462 | ??? This is a kludge. */ |
| 1463 | if (!reload_completed |
| 1464 | && maybe_ne (SUBREG_BYTE (op)(((op)->u.fld[1]).rt_subreg), 0) |
| 1465 | && MEM_P (sub)(((enum rtx_code) (sub)->code) == MEM)) |
| 1466 | return 0; |
| 1467 | |
| 1468 | if (REG_P (sub)(((enum rtx_code) (sub)->code) == REG) |
| 1469 | && REGNO (sub)(rhs_regno(sub)) < FIRST_PSEUDO_REGISTER76 |
| 1470 | && !REG_CAN_CHANGE_MODE_P (REGNO (sub), GET_MODE (sub), mode)(targetm.can_change_mode_class (((machine_mode) (sub)->mode ), mode, (regclass_map[((rhs_regno(sub)))]))) |
| 1471 | && GET_MODE_CLASS (GET_MODE (sub))((enum mode_class) mode_class[((machine_mode) (sub)->mode) ]) != MODE_COMPLEX_INT |
| 1472 | && GET_MODE_CLASS (GET_MODE (sub))((enum mode_class) mode_class[((machine_mode) (sub)->mode) ]) != MODE_COMPLEX_FLOAT |
| 1473 | /* LRA can generate some invalid SUBREGS just for matched |
| 1474 | operand reload presentation. LRA needs to treat them as |
| 1475 | valid. */ |
| 1476 | && ! LRA_SUBREG_P (op)(__extension__ ({ __typeof ((op)) const _rtx = ((op)); if ((( enum rtx_code) (_rtx)->code) != SUBREG) rtl_check_failed_flag ("LRA_SUBREG_P", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1476, __FUNCTION__); _rtx; })->jump)) |
| 1477 | return 0; |
| 1478 | |
| 1479 | /* FLOAT_MODE subregs can't be paradoxical. Combine will occasionally |
| 1480 | create such rtl, and we must reject it. */ |
| 1481 | if (SCALAR_FLOAT_MODE_P (GET_MODE (op))(((enum mode_class) mode_class[((machine_mode) (op)->mode) ]) == MODE_FLOAT || ((enum mode_class) mode_class[((machine_mode ) (op)->mode)]) == MODE_DECIMAL_FLOAT) |
| 1482 | /* LRA can use subreg to store a floating point value in an |
| 1483 | integer mode. Although the floating point and the |
| 1484 | integer modes need the same number of hard registers, the |
| 1485 | size of floating point mode can be less than the integer |
| 1486 | mode. */ |
| 1487 | && ! lra_in_progress |
| 1488 | && paradoxical_subreg_p (op)) |
| 1489 | return 0; |
| 1490 | |
| 1491 | op = sub; |
| 1492 | code = GET_CODE (op)((enum rtx_code) (op)->code); |
| 1493 | } |
| 1494 | |
| 1495 | if (code == REG) |
| 1496 | return (REGNO (op)(rhs_regno(op)) >= FIRST_PSEUDO_REGISTER76 |
| 1497 | || in_hard_reg_set_p (operand_reg_set(this_target_hard_regs->x_operand_reg_set), GET_MODE (op)((machine_mode) (op)->mode), REGNO (op)(rhs_regno(op)))); |
| 1498 | |
| 1499 | if (code == MEM) |
| 1500 | { |
| 1501 | rtx y = XEXP (op, 0)(((op)->u.fld[0]).rt_rtx); |
| 1502 | |
| 1503 | if (! volatile_ok && MEM_VOLATILE_P (op)(__extension__ ({ __typeof ((op)) const _rtx = ((op)); if ((( enum rtx_code) (_rtx)->code) != MEM && ((enum rtx_code ) (_rtx)->code) != ASM_OPERANDS && ((enum rtx_code ) (_rtx)->code) != ASM_INPUT) rtl_check_failed_flag ("MEM_VOLATILE_P" , _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1503, __FUNCTION__); _rtx; })->volatil)) |
| 1504 | return 0; |
| 1505 | |
| 1506 | /* Use the mem's mode, since it will be reloaded thus. LRA can |
| 1507 | generate move insn with invalid addresses which is made valid |
| 1508 | and efficiently calculated by LRA through further numerous |
| 1509 | transformations. */ |
| 1510 | if (lra_in_progress |
| 1511 | || memory_address_addr_space_p (GET_MODE (op)((machine_mode) (op)->mode), y, MEM_ADDR_SPACE (op)(get_mem_attrs (op)->addrspace))) |
| 1512 | return 1; |
| 1513 | } |
| 1514 | |
| 1515 | return 0; |
| 1516 | } |
| 1517 | |
| 1518 | /* Return 1 if OP is a valid memory address for a memory reference |
| 1519 | of mode MODE. |
| 1520 | |
| 1521 | The main use of this function is as a predicate in match_operand |
| 1522 | expressions in the machine description. */ |
| 1523 | |
| 1524 | int |
| 1525 | address_operand (rtx op, machine_mode mode) |
| 1526 | { |
| 1527 | /* Wrong mode for an address expr. */ |
| 1528 | if (GET_MODE (op)((machine_mode) (op)->mode) != VOIDmode((void) 0, E_VOIDmode) |
| 1529 | && ! SCALAR_INT_MODE_P (GET_MODE (op))(((enum mode_class) mode_class[((machine_mode) (op)->mode) ]) == MODE_INT || ((enum mode_class) mode_class[((machine_mode ) (op)->mode)]) == MODE_PARTIAL_INT)) |
| 1530 | return false; |
| 1531 | |
| 1532 | return memory_address_p (mode, op)memory_address_addr_space_p ((mode), (op), 0); |
| 1533 | } |
| 1534 | |
| 1535 | /* Return 1 if OP is a register reference of mode MODE. |
| 1536 | If MODE is VOIDmode, accept a register in any mode. |
| 1537 | |
| 1538 | The main use of this function is as a predicate in match_operand |
| 1539 | expressions in the machine description. */ |
| 1540 | |
| 1541 | int |
| 1542 | register_operand (rtx op, machine_mode mode) |
| 1543 | { |
| 1544 | if (GET_CODE (op)((enum rtx_code) (op)->code) == SUBREG) |
| 1545 | { |
| 1546 | rtx sub = SUBREG_REG (op)(((op)->u.fld[0]).rt_rtx); |
| 1547 | |
| 1548 | /* Before reload, we can allow (SUBREG (MEM...)) as a register operand |
| 1549 | because it is guaranteed to be reloaded into one. |
| 1550 | Just make sure the MEM is valid in itself. |
| 1551 | (Ideally, (SUBREG (MEM)...) should not exist after reload, |
| 1552 | but currently it does result from (SUBREG (REG)...) where the |
| 1553 | reg went on the stack.) */ |
| 1554 | if (!REG_P (sub)(((enum rtx_code) (sub)->code) == REG) && (reload_completed || !MEM_P (sub)(((enum rtx_code) (sub)->code) == MEM))) |
| 1555 | return 0; |
| 1556 | } |
| 1557 | else if (!REG_P (op)(((enum rtx_code) (op)->code) == REG)) |
| 1558 | return 0; |
| 1559 | return general_operand (op, mode); |
| 1560 | } |
| 1561 | |
| 1562 | /* Return 1 for a register in Pmode; ignore the tested mode. */ |
| 1563 | |
| 1564 | int |
| 1565 | pmode_register_operand (rtx op, machine_mode mode ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 1566 | { |
| 1567 | return register_operand (op, Pmode(global_options.x_ix86_pmode == PMODE_DI ? (scalar_int_mode ( (scalar_int_mode::from_int) E_DImode)) : (scalar_int_mode ((scalar_int_mode ::from_int) E_SImode)))); |
| 1568 | } |
| 1569 | |
| 1570 | /* Return 1 if OP should match a MATCH_SCRATCH, i.e., if it is a SCRATCH |
| 1571 | or a hard register. */ |
| 1572 | |
| 1573 | int |
| 1574 | scratch_operand (rtx op, machine_mode mode) |
| 1575 | { |
| 1576 | if (GET_MODE (op)((machine_mode) (op)->mode) != mode && mode != VOIDmode((void) 0, E_VOIDmode)) |
| 1577 | return 0; |
| 1578 | |
| 1579 | return (GET_CODE (op)((enum rtx_code) (op)->code) == SCRATCH |
| 1580 | || (REG_P (op)(((enum rtx_code) (op)->code) == REG) |
| 1581 | && (lra_in_progress |
| 1582 | || (REGNO (op)(rhs_regno(op)) < FIRST_PSEUDO_REGISTER76 |
| 1583 | && REGNO_REG_CLASS (REGNO (op))(regclass_map[((rhs_regno(op)))]) != NO_REGS)))); |
| 1584 | } |
| 1585 | |
| 1586 | /* Return 1 if OP is a valid immediate operand for mode MODE. |
| 1587 | |
| 1588 | The main use of this function is as a predicate in match_operand |
| 1589 | expressions in the machine description. */ |
| 1590 | |
| 1591 | int |
| 1592 | immediate_operand (rtx op, machine_mode mode) |
| 1593 | { |
| 1594 | /* Don't accept CONST_INT or anything similar |
| 1595 | if the caller wants something floating. */ |
| 1596 | if (GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode) && mode != VOIDmode((void) 0, E_VOIDmode) |
| 1597 | && GET_MODE_CLASS (mode)((enum mode_class) mode_class[mode]) != MODE_INT |
| 1598 | && GET_MODE_CLASS (mode)((enum mode_class) mode_class[mode]) != MODE_PARTIAL_INT) |
| 1599 | return 0; |
| 1600 | |
| 1601 | if (CONST_INT_P (op)(((enum rtx_code) (op)->code) == CONST_INT) |
| 1602 | && mode != VOIDmode((void) 0, E_VOIDmode) |
| 1603 | && trunc_int_for_mode (INTVAL (op)((op)->u.hwint[0]), mode) != INTVAL (op)((op)->u.hwint[0])) |
| 1604 | return 0; |
| 1605 | |
| 1606 | return (CONSTANT_P (op)((rtx_class[(int) (((enum rtx_code) (op)->code))]) == RTX_CONST_OBJ ) |
| 1607 | && (GET_MODE (op)((machine_mode) (op)->mode) == mode || mode == VOIDmode((void) 0, E_VOIDmode) |
| 1608 | || GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode)) |
| 1609 | && (! flag_picglobal_options.x_flag_pic || LEGITIMATE_PIC_OPERAND_P (op)legitimate_pic_operand_p (op)) |
| 1610 | && targetm.legitimate_constant_p (mode == VOIDmode((void) 0, E_VOIDmode) |
| 1611 | ? GET_MODE (op)((machine_mode) (op)->mode) |
| 1612 | : mode, op)); |
| 1613 | } |
| 1614 | |
| 1615 | /* Returns 1 if OP is an operand that is a CONST_INT of mode MODE. */ |
| 1616 | |
| 1617 | int |
| 1618 | const_int_operand (rtx op, machine_mode mode) |
| 1619 | { |
| 1620 | if (!CONST_INT_P (op)(((enum rtx_code) (op)->code) == CONST_INT)) |
| 1621 | return 0; |
| 1622 | |
| 1623 | if (mode != VOIDmode((void) 0, E_VOIDmode) |
| 1624 | && trunc_int_for_mode (INTVAL (op)((op)->u.hwint[0]), mode) != INTVAL (op)((op)->u.hwint[0])) |
| 1625 | return 0; |
| 1626 | |
| 1627 | return 1; |
| 1628 | } |
| 1629 | |
| 1630 | #if TARGET_SUPPORTS_WIDE_INT1 |
| 1631 | /* Returns 1 if OP is an operand that is a CONST_INT or CONST_WIDE_INT |
| 1632 | of mode MODE. */ |
| 1633 | int |
| 1634 | const_scalar_int_operand (rtx op, machine_mode mode) |
| 1635 | { |
| 1636 | if (!CONST_SCALAR_INT_P (op)((((enum rtx_code) (op)->code) == CONST_INT) || (((enum rtx_code ) (op)->code) == CONST_WIDE_INT))) |
| 1637 | return 0; |
| 1638 | |
| 1639 | if (CONST_INT_P (op)(((enum rtx_code) (op)->code) == CONST_INT)) |
| 1640 | return const_int_operand (op, mode); |
| 1641 | |
| 1642 | if (mode != VOIDmode((void) 0, E_VOIDmode)) |
| 1643 | { |
| 1644 | scalar_int_mode int_mode = as_a <scalar_int_mode> (mode); |
| 1645 | int prec = GET_MODE_PRECISION (int_mode); |
| 1646 | int bitsize = GET_MODE_BITSIZE (int_mode); |
| 1647 | |
| 1648 | if (CONST_WIDE_INT_NUNITS (op)((int)__extension__ ({ __typeof ((op)) const _rtx = ((op)); if (((enum rtx_code) (_rtx)->code) != CONST_WIDE_INT) rtl_check_failed_flag ("CWI_GET_NUM_ELEM", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1648, __FUNCTION__); _rtx; })->u2.num_elem) * HOST_BITS_PER_WIDE_INT64 > bitsize) |
| 1649 | return 0; |
| 1650 | |
| 1651 | if (prec == bitsize) |
| 1652 | return 1; |
| 1653 | else |
| 1654 | { |
| 1655 | /* Multiword partial int. */ |
| 1656 | HOST_WIDE_INTlong x |
| 1657 | = CONST_WIDE_INT_ELT (op, CONST_WIDE_INT_NUNITS (op) - 1)((op)->u.hwiv.elem[((int)__extension__ ({ __typeof ((op)) const _rtx = ((op)); if (((enum rtx_code) (_rtx)->code) != CONST_WIDE_INT ) rtl_check_failed_flag ("CWI_GET_NUM_ELEM", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1657, __FUNCTION__); _rtx; })->u2.num_elem) - 1]); |
| 1658 | return (sext_hwi (x, prec & (HOST_BITS_PER_WIDE_INT64 - 1)) == x); |
| 1659 | } |
| 1660 | } |
| 1661 | return 1; |
| 1662 | } |
| 1663 | |
| 1664 | /* Returns 1 if OP is an operand that is a constant integer or constant |
| 1665 | floating-point number of MODE. */ |
| 1666 | |
| 1667 | int |
| 1668 | const_double_operand (rtx op, machine_mode mode) |
| 1669 | { |
| 1670 | return (GET_CODE (op)((enum rtx_code) (op)->code) == CONST_DOUBLE) |
| 1671 | && (GET_MODE (op)((machine_mode) (op)->mode) == mode || mode == VOIDmode((void) 0, E_VOIDmode)); |
| 1672 | } |
| 1673 | #else |
| 1674 | /* Returns 1 if OP is an operand that is a constant integer or constant |
| 1675 | floating-point number of MODE. */ |
| 1676 | |
| 1677 | int |
| 1678 | const_double_operand (rtx op, machine_mode mode) |
| 1679 | { |
| 1680 | /* Don't accept CONST_INT or anything similar |
| 1681 | if the caller wants something floating. */ |
| 1682 | if (GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode) && mode != VOIDmode((void) 0, E_VOIDmode) |
| 1683 | && GET_MODE_CLASS (mode)((enum mode_class) mode_class[mode]) != MODE_INT |
| 1684 | && GET_MODE_CLASS (mode)((enum mode_class) mode_class[mode]) != MODE_PARTIAL_INT) |
| 1685 | return 0; |
| 1686 | |
| 1687 | return ((CONST_DOUBLE_P (op)(((enum rtx_code) (op)->code) == CONST_DOUBLE) || CONST_INT_P (op)(((enum rtx_code) (op)->code) == CONST_INT)) |
| 1688 | && (mode == VOIDmode((void) 0, E_VOIDmode) || GET_MODE (op)((machine_mode) (op)->mode) == mode |
| 1689 | || GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode))); |
| 1690 | } |
| 1691 | #endif |
| 1692 | /* Return 1 if OP is a general operand that is not an immediate |
| 1693 | operand of mode MODE. */ |
| 1694 | |
| 1695 | int |
| 1696 | nonimmediate_operand (rtx op, machine_mode mode) |
| 1697 | { |
| 1698 | return (general_operand (op, mode) && ! CONSTANT_P (op)((rtx_class[(int) (((enum rtx_code) (op)->code))]) == RTX_CONST_OBJ )); |
| 1699 | } |
| 1700 | |
| 1701 | /* Return 1 if OP is a register reference or immediate value of mode MODE. */ |
| 1702 | |
| 1703 | int |
| 1704 | nonmemory_operand (rtx op, machine_mode mode) |
| 1705 | { |
| 1706 | if (CONSTANT_P (op)((rtx_class[(int) (((enum rtx_code) (op)->code))]) == RTX_CONST_OBJ )) |
| 1707 | return immediate_operand (op, mode); |
| 1708 | return register_operand (op, mode); |
| 1709 | } |
| 1710 | |
| 1711 | /* Return 1 if OP is a valid operand that stands for pushing a |
| 1712 | value of mode MODE onto the stack. |
| 1713 | |
| 1714 | The main use of this function is as a predicate in match_operand |
| 1715 | expressions in the machine description. */ |
| 1716 | |
| 1717 | int |
| 1718 | push_operand (rtx op, machine_mode mode) |
| 1719 | { |
| 1720 | if (!MEM_P (op)(((enum rtx_code) (op)->code) == MEM)) |
| 1721 | return 0; |
| 1722 | |
| 1723 | if (mode != VOIDmode((void) 0, E_VOIDmode) && GET_MODE (op)((machine_mode) (op)->mode) != mode) |
| 1724 | return 0; |
| 1725 | |
| 1726 | poly_int64 rounded_size = GET_MODE_SIZE (mode); |
| 1727 | |
| 1728 | #ifdef PUSH_ROUNDING |
| 1729 | rounded_size = PUSH_ROUNDING (MACRO_INT (rounded_size))ix86_push_rounding (((rounded_size).to_constant ())); |
| 1730 | #endif |
| 1731 | |
| 1732 | op = XEXP (op, 0)(((op)->u.fld[0]).rt_rtx); |
| 1733 | |
| 1734 | if (known_eq (rounded_size, GET_MODE_SIZE (mode))(!maybe_ne (rounded_size, GET_MODE_SIZE (mode)))) |
| 1735 | { |
| 1736 | if (GET_CODE (op)((enum rtx_code) (op)->code) != STACK_PUSH_CODEPRE_DEC) |
| 1737 | return 0; |
| 1738 | } |
| 1739 | else |
| 1740 | { |
| 1741 | poly_int64 offset; |
| 1742 | if (GET_CODE (op)((enum rtx_code) (op)->code) != PRE_MODIFY |
| 1743 | || GET_CODE (XEXP (op, 1))((enum rtx_code) ((((op)->u.fld[1]).rt_rtx))->code) != PLUS |
| 1744 | || XEXP (XEXP (op, 1), 0)((((((op)->u.fld[1]).rt_rtx))->u.fld[0]).rt_rtx) != XEXP (op, 0)(((op)->u.fld[0]).rt_rtx) |
| 1745 | || !poly_int_rtx_p (XEXP (XEXP (op, 1), 1)((((((op)->u.fld[1]).rt_rtx))->u.fld[1]).rt_rtx), &offset) |
| 1746 | || (STACK_GROWS_DOWNWARD1 |
| 1747 | ? maybe_ne (offset, -rounded_size) |
| 1748 | : maybe_ne (offset, rounded_size))) |
| 1749 | return 0; |
| 1750 | } |
| 1751 | |
| 1752 | return XEXP (op, 0)(((op)->u.fld[0]).rt_rtx) == stack_pointer_rtx((this_target_rtl->x_global_rtl)[GR_STACK_POINTER]); |
| 1753 | } |
| 1754 | |
| 1755 | /* Return 1 if OP is a valid operand that stands for popping a |
| 1756 | value of mode MODE off the stack. |
| 1757 | |
| 1758 | The main use of this function is as a predicate in match_operand |
| 1759 | expressions in the machine description. */ |
| 1760 | |
| 1761 | int |
| 1762 | pop_operand (rtx op, machine_mode mode) |
| 1763 | { |
| 1764 | if (!MEM_P (op)(((enum rtx_code) (op)->code) == MEM)) |
| 1765 | return 0; |
| 1766 | |
| 1767 | if (mode != VOIDmode((void) 0, E_VOIDmode) && GET_MODE (op)((machine_mode) (op)->mode) != mode) |
| 1768 | return 0; |
| 1769 | |
| 1770 | op = XEXP (op, 0)(((op)->u.fld[0]).rt_rtx); |
| 1771 | |
| 1772 | if (GET_CODE (op)((enum rtx_code) (op)->code) != STACK_POP_CODEPOST_INC) |
| 1773 | return 0; |
| 1774 | |
| 1775 | return XEXP (op, 0)(((op)->u.fld[0]).rt_rtx) == stack_pointer_rtx((this_target_rtl->x_global_rtl)[GR_STACK_POINTER]); |
| 1776 | } |
| 1777 | |
| 1778 | /* Return 1 if ADDR is a valid memory address |
| 1779 | for mode MODE in address space AS. */ |
| 1780 | |
| 1781 | int |
| 1782 | memory_address_addr_space_p (machine_mode mode ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 1783 | rtx addr, addr_space_t as) |
| 1784 | { |
| 1785 | #ifdef GO_IF_LEGITIMATE_ADDRESS |
| 1786 | gcc_assert (ADDR_SPACE_GENERIC_P (as))((void)(!(((as) == 0)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 1786, __FUNCTION__), 0 : 0)); |
| 1787 | GO_IF_LEGITIMATE_ADDRESS (mode, addr, win); |
| 1788 | return 0; |
| 1789 | |
| 1790 | win: |
| 1791 | return 1; |
| 1792 | #else |
| 1793 | return targetm.addr_space.legitimate_address_p (mode, addr, 0, as); |
| 1794 | #endif |
| 1795 | } |
| 1796 | |
| 1797 | /* Return 1 if OP is a valid memory reference with mode MODE, |
| 1798 | including a valid address. |
| 1799 | |
| 1800 | The main use of this function is as a predicate in match_operand |
| 1801 | expressions in the machine description. */ |
| 1802 | |
| 1803 | int |
| 1804 | memory_operand (rtx op, machine_mode mode) |
| 1805 | { |
| 1806 | rtx inner; |
| 1807 | |
| 1808 | if (! reload_completed) |
| 1809 | /* Note that no SUBREG is a memory operand before end of reload pass, |
| 1810 | because (SUBREG (MEM...)) forces reloading into a register. */ |
| 1811 | return MEM_P (op)(((enum rtx_code) (op)->code) == MEM) && general_operand (op, mode); |
| 1812 | |
| 1813 | if (mode != VOIDmode((void) 0, E_VOIDmode) && GET_MODE (op)((machine_mode) (op)->mode) != mode) |
| 1814 | return 0; |
| 1815 | |
| 1816 | inner = op; |
| 1817 | if (GET_CODE (inner)((enum rtx_code) (inner)->code) == SUBREG) |
| 1818 | inner = SUBREG_REG (inner)(((inner)->u.fld[0]).rt_rtx); |
| 1819 | |
| 1820 | return (MEM_P (inner)(((enum rtx_code) (inner)->code) == MEM) && general_operand (op, mode)); |
| 1821 | } |
| 1822 | |
| 1823 | /* Return 1 if OP is a valid indirect memory reference with mode MODE; |
| 1824 | that is, a memory reference whose address is a general_operand. */ |
| 1825 | |
| 1826 | int |
| 1827 | indirect_operand (rtx op, machine_mode mode) |
| 1828 | { |
| 1829 | /* Before reload, a SUBREG isn't in memory (see memory_operand, above). */ |
| 1830 | if (! reload_completed |
| 1831 | && GET_CODE (op)((enum rtx_code) (op)->code) == SUBREG && MEM_P (SUBREG_REG (op))(((enum rtx_code) ((((op)->u.fld[0]).rt_rtx))->code) == MEM)) |
| 1832 | { |
| 1833 | if (mode != VOIDmode((void) 0, E_VOIDmode) && GET_MODE (op)((machine_mode) (op)->mode) != mode) |
| 1834 | return 0; |
| 1835 | |
| 1836 | /* The only way that we can have a general_operand as the resulting |
| 1837 | address is if OFFSET is zero and the address already is an operand |
| 1838 | or if the address is (plus Y (const_int -OFFSET)) and Y is an |
| 1839 | operand. */ |
| 1840 | poly_int64 offset; |
| 1841 | rtx addr = strip_offset (XEXP (SUBREG_REG (op), 0)((((((op)->u.fld[0]).rt_rtx))->u.fld[0]).rt_rtx), &offset); |
| 1842 | return (known_eq (offset + SUBREG_BYTE (op), 0)(!maybe_ne (offset + (((op)->u.fld[1]).rt_subreg), 0)) |
| 1843 | && general_operand (addr, Pmode(global_options.x_ix86_pmode == PMODE_DI ? (scalar_int_mode ( (scalar_int_mode::from_int) E_DImode)) : (scalar_int_mode ((scalar_int_mode ::from_int) E_SImode))))); |
| 1844 | } |
| 1845 | |
| 1846 | return (MEM_P (op)(((enum rtx_code) (op)->code) == MEM) |
| 1847 | && memory_operand (op, mode) |
| 1848 | && general_operand (XEXP (op, 0)(((op)->u.fld[0]).rt_rtx), Pmode(global_options.x_ix86_pmode == PMODE_DI ? (scalar_int_mode ( (scalar_int_mode::from_int) E_DImode)) : (scalar_int_mode ((scalar_int_mode ::from_int) E_SImode))))); |
| 1849 | } |
| 1850 | |
| 1851 | /* Return 1 if this is an ordered comparison operator (not including |
| 1852 | ORDERED and UNORDERED). */ |
| 1853 | |
| 1854 | int |
| 1855 | ordered_comparison_operator (rtx op, machine_mode mode) |
| 1856 | { |
| 1857 | if (mode != VOIDmode((void) 0, E_VOIDmode) && GET_MODE (op)((machine_mode) (op)->mode) != mode) |
| 1858 | return false; |
| 1859 | switch (GET_CODE (op)((enum rtx_code) (op)->code)) |
| 1860 | { |
| 1861 | case EQ: |
| 1862 | case NE: |
| 1863 | case LT: |
| 1864 | case LTU: |
| 1865 | case LE: |
| 1866 | case LEU: |
| 1867 | case GT: |
| 1868 | case GTU: |
| 1869 | case GE: |
| 1870 | case GEU: |
| 1871 | return true; |
| 1872 | default: |
| 1873 | return false; |
| 1874 | } |
| 1875 | } |
| 1876 | |
| 1877 | /* Return 1 if this is a comparison operator. This allows the use of |
| 1878 | MATCH_OPERATOR to recognize all the branch insns. */ |
| 1879 | |
| 1880 | int |
| 1881 | comparison_operator (rtx op, machine_mode mode) |
| 1882 | { |
| 1883 | return ((mode == VOIDmode((void) 0, E_VOIDmode) || GET_MODE (op)((machine_mode) (op)->mode) == mode) |
| 1884 | && COMPARISON_P (op)(((rtx_class[(int) (((enum rtx_code) (op)->code))]) & ( ~1)) == (RTX_COMPARE & (~1)))); |
| 1885 | } |
| 1886 | |
| 1887 | /* If BODY is an insn body that uses ASM_OPERANDS, return it. */ |
| 1888 | |
| 1889 | rtx |
| 1890 | extract_asm_operands (rtx body) |
| 1891 | { |
| 1892 | rtx tmp; |
| 1893 | switch (GET_CODE (body)((enum rtx_code) (body)->code)) |
| 1894 | { |
| 1895 | case ASM_OPERANDS: |
| 1896 | return body; |
| 1897 | |
| 1898 | case SET: |
| 1899 | /* Single output operand: BODY is (set OUTPUT (asm_operands ...)). */ |
| 1900 | tmp = SET_SRC (body)(((body)->u.fld[1]).rt_rtx); |
| 1901 | if (GET_CODE (tmp)((enum rtx_code) (tmp)->code) == ASM_OPERANDS) |
| 1902 | return tmp; |
| 1903 | break; |
| 1904 | |
| 1905 | case PARALLEL: |
| 1906 | tmp = XVECEXP (body, 0, 0)(((((body)->u.fld[0]).rt_rtvec))->elem[0]); |
| 1907 | if (GET_CODE (tmp)((enum rtx_code) (tmp)->code) == ASM_OPERANDS) |
| 1908 | return tmp; |
| 1909 | if (GET_CODE (tmp)((enum rtx_code) (tmp)->code) == SET) |
| 1910 | { |
| 1911 | tmp = SET_SRC (tmp)(((tmp)->u.fld[1]).rt_rtx); |
| 1912 | if (GET_CODE (tmp)((enum rtx_code) (tmp)->code) == ASM_OPERANDS) |
| 1913 | return tmp; |
| 1914 | } |
| 1915 | break; |
| 1916 | |
| 1917 | default: |
| 1918 | break; |
| 1919 | } |
| 1920 | return NULLnullptr; |
| 1921 | } |
| 1922 | |
| 1923 | /* If BODY is an insn body that uses ASM_OPERANDS, |
| 1924 | return the number of operands (both input and output) in the insn. |
| 1925 | If BODY is an insn body that uses ASM_INPUT with CLOBBERS in PARALLEL, |
| 1926 | return 0. |
| 1927 | Otherwise return -1. */ |
| 1928 | |
| 1929 | int |
| 1930 | asm_noperands (const_rtx body) |
| 1931 | { |
| 1932 | rtx asm_op = extract_asm_operands (CONST_CAST_RTX (body)(const_cast<struct rtx_def *> (((body))))); |
| 1933 | int i, n_sets = 0; |
| 1934 | |
| 1935 | if (asm_op == NULLnullptr) |
| 1936 | { |
| 1937 | if (GET_CODE (body)((enum rtx_code) (body)->code) == PARALLEL && XVECLEN (body, 0)(((((body)->u.fld[0]).rt_rtvec))->num_elem) >= 2 |
| 1938 | && GET_CODE (XVECEXP (body, 0, 0))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [0]))->code) == ASM_INPUT) |
| 1939 | { |
| 1940 | /* body is [(asm_input ...) (clobber (reg ...))...]. */ |
| 1941 | for (i = XVECLEN (body, 0)(((((body)->u.fld[0]).rt_rtvec))->num_elem) - 1; i > 0; i--) |
| 1942 | if (GET_CODE (XVECEXP (body, 0, i))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [i]))->code) != CLOBBER) |
| 1943 | return -1; |
| 1944 | return 0; |
| 1945 | } |
| 1946 | return -1; |
| 1947 | } |
| 1948 | |
| 1949 | if (GET_CODE (body)((enum rtx_code) (body)->code) == SET) |
| 1950 | n_sets = 1; |
| 1951 | else if (GET_CODE (body)((enum rtx_code) (body)->code) == PARALLEL) |
| 1952 | { |
| 1953 | if (GET_CODE (XVECEXP (body, 0, 0))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [0]))->code) == SET) |
| 1954 | { |
| 1955 | /* Multiple output operands, or 1 output plus some clobbers: |
| 1956 | body is |
| 1957 | [(set OUTPUT (asm_operands ...))... (clobber (reg ...))...]. */ |
| 1958 | /* Count backwards through CLOBBERs to determine number of SETs. */ |
| 1959 | for (i = XVECLEN (body, 0)(((((body)->u.fld[0]).rt_rtvec))->num_elem); i > 0; i--) |
| 1960 | { |
| 1961 | if (GET_CODE (XVECEXP (body, 0, i - 1))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [i - 1]))->code) == SET) |
| 1962 | break; |
| 1963 | if (GET_CODE (XVECEXP (body, 0, i - 1))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [i - 1]))->code) != CLOBBER) |
| 1964 | return -1; |
| 1965 | } |
| 1966 | |
| 1967 | /* N_SETS is now number of output operands. */ |
| 1968 | n_sets = i; |
| 1969 | |
| 1970 | /* Verify that all the SETs we have |
| 1971 | came from a single original asm_operands insn |
| 1972 | (so that invalid combinations are blocked). */ |
| 1973 | for (i = 0; i < n_sets; i++) |
| 1974 | { |
| 1975 | rtx elt = XVECEXP (body, 0, i)(((((body)->u.fld[0]).rt_rtvec))->elem[i]); |
| 1976 | if (GET_CODE (elt)((enum rtx_code) (elt)->code) != SET) |
| 1977 | return -1; |
| 1978 | if (GET_CODE (SET_SRC (elt))((enum rtx_code) ((((elt)->u.fld[1]).rt_rtx))->code) != ASM_OPERANDS) |
| 1979 | return -1; |
| 1980 | /* If these ASM_OPERANDS rtx's came from different original insns |
| 1981 | then they aren't allowed together. */ |
| 1982 | if (ASM_OPERANDS_INPUT_VEC (SET_SRC (elt))((((((elt)->u.fld[1]).rt_rtx))->u.fld[3]).rt_rtvec) |
| 1983 | != ASM_OPERANDS_INPUT_VEC (asm_op)(((asm_op)->u.fld[3]).rt_rtvec)) |
| 1984 | return -1; |
| 1985 | } |
| 1986 | } |
| 1987 | else |
| 1988 | { |
| 1989 | /* 0 outputs, but some clobbers: |
| 1990 | body is [(asm_operands ...) (clobber (reg ...))...]. */ |
| 1991 | /* Make sure all the other parallel things really are clobbers. */ |
| 1992 | for (i = XVECLEN (body, 0)(((((body)->u.fld[0]).rt_rtvec))->num_elem) - 1; i > 0; i--) |
| 1993 | if (GET_CODE (XVECEXP (body, 0, i))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [i]))->code) != CLOBBER) |
| 1994 | return -1; |
| 1995 | } |
| 1996 | } |
| 1997 | |
| 1998 | return (ASM_OPERANDS_INPUT_LENGTH (asm_op)(((((asm_op)->u.fld[3]).rt_rtvec))->num_elem) |
| 1999 | + ASM_OPERANDS_LABEL_LENGTH (asm_op)(((((asm_op)->u.fld[5]).rt_rtvec))->num_elem) + n_sets); |
| 2000 | } |
| 2001 | |
| 2002 | /* Assuming BODY is an insn body that uses ASM_OPERANDS, |
| 2003 | copy its operands (both input and output) into the vector OPERANDS, |
| 2004 | the locations of the operands within the insn into the vector OPERAND_LOCS, |
| 2005 | and the constraints for the operands into CONSTRAINTS. |
| 2006 | Write the modes of the operands into MODES. |
| 2007 | Write the location info into LOC. |
| 2008 | Return the assembler-template. |
| 2009 | If BODY is an insn body that uses ASM_INPUT with CLOBBERS in PARALLEL, |
| 2010 | return the basic assembly string. |
| 2011 | |
| 2012 | If LOC, MODES, OPERAND_LOCS, CONSTRAINTS or OPERANDS is 0, |
| 2013 | we don't store that info. */ |
| 2014 | |
| 2015 | const char * |
| 2016 | decode_asm_operands (rtx body, rtx *operands, rtx **operand_locs, |
| 2017 | const char **constraints, machine_mode *modes, |
| 2018 | location_t *loc) |
| 2019 | { |
| 2020 | int nbase = 0, n, i; |
| 2021 | rtx asmop; |
| 2022 | |
| 2023 | switch (GET_CODE (body)((enum rtx_code) (body)->code)) |
| 2024 | { |
| 2025 | case ASM_OPERANDS: |
| 2026 | /* Zero output asm: BODY is (asm_operands ...). */ |
| 2027 | asmop = body; |
| 2028 | break; |
| 2029 | |
| 2030 | case SET: |
| 2031 | /* Single output asm: BODY is (set OUTPUT (asm_operands ...)). */ |
| 2032 | asmop = SET_SRC (body)(((body)->u.fld[1]).rt_rtx); |
| 2033 | |
| 2034 | /* The output is in the SET. |
| 2035 | Its constraint is in the ASM_OPERANDS itself. */ |
| 2036 | if (operands) |
| 2037 | operands[0] = SET_DEST (body)(((body)->u.fld[0]).rt_rtx); |
| 2038 | if (operand_locs) |
| 2039 | operand_locs[0] = &SET_DEST (body)(((body)->u.fld[0]).rt_rtx); |
| 2040 | if (constraints) |
| 2041 | constraints[0] = ASM_OPERANDS_OUTPUT_CONSTRAINT (asmop)(((asmop)->u.fld[1]).rt_str); |
| 2042 | if (modes) |
| 2043 | modes[0] = GET_MODE (SET_DEST (body))((machine_mode) ((((body)->u.fld[0]).rt_rtx))->mode); |
| 2044 | nbase = 1; |
| 2045 | break; |
| 2046 | |
| 2047 | case PARALLEL: |
| 2048 | { |
| 2049 | int nparallel = XVECLEN (body, 0)(((((body)->u.fld[0]).rt_rtvec))->num_elem); /* Includes CLOBBERs. */ |
| 2050 | |
| 2051 | asmop = XVECEXP (body, 0, 0)(((((body)->u.fld[0]).rt_rtvec))->elem[0]); |
| 2052 | if (GET_CODE (asmop)((enum rtx_code) (asmop)->code) == SET) |
| 2053 | { |
| 2054 | asmop = SET_SRC (asmop)(((asmop)->u.fld[1]).rt_rtx); |
| 2055 | |
| 2056 | /* At least one output, plus some CLOBBERs. The outputs are in |
| 2057 | the SETs. Their constraints are in the ASM_OPERANDS itself. */ |
| 2058 | for (i = 0; i < nparallel; i++) |
| 2059 | { |
| 2060 | if (GET_CODE (XVECEXP (body, 0, i))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [i]))->code) == CLOBBER) |
| 2061 | break; /* Past last SET */ |
| 2062 | gcc_assert (GET_CODE (XVECEXP (body, 0, i)) == SET)((void)(!(((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec ))->elem[i]))->code) == SET) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2062, __FUNCTION__), 0 : 0)); |
| 2063 | if (operands) |
| 2064 | operands[i] = SET_DEST (XVECEXP (body, 0, i))((((((((body)->u.fld[0]).rt_rtvec))->elem[i]))->u.fld [0]).rt_rtx); |
| 2065 | if (operand_locs) |
| 2066 | operand_locs[i] = &SET_DEST (XVECEXP (body, 0, i))((((((((body)->u.fld[0]).rt_rtvec))->elem[i]))->u.fld [0]).rt_rtx); |
| 2067 | if (constraints) |
| 2068 | constraints[i] = XSTR (SET_SRC (XVECEXP (body, 0, i)), 1)(((((((((((body)->u.fld[0]).rt_rtvec))->elem[i]))->u .fld[1]).rt_rtx))->u.fld[1]).rt_str); |
| 2069 | if (modes) |
| 2070 | modes[i] = GET_MODE (SET_DEST (XVECEXP (body, 0, i)))((machine_mode) (((((((((body)->u.fld[0]).rt_rtvec))->elem [i]))->u.fld[0]).rt_rtx))->mode); |
| 2071 | } |
| 2072 | nbase = i; |
| 2073 | } |
| 2074 | else if (GET_CODE (asmop)((enum rtx_code) (asmop)->code) == ASM_INPUT) |
| 2075 | { |
| 2076 | if (loc) |
| 2077 | *loc = ASM_INPUT_SOURCE_LOCATION (asmop)(((asmop)->u.fld[1]).rt_uint); |
| 2078 | return XSTR (asmop, 0)(((asmop)->u.fld[0]).rt_str); |
| 2079 | } |
| 2080 | break; |
| 2081 | } |
| 2082 | |
| 2083 | default: |
| 2084 | gcc_unreachable ()(fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2084, __FUNCTION__)); |
| 2085 | } |
| 2086 | |
| 2087 | n = ASM_OPERANDS_INPUT_LENGTH (asmop)(((((asmop)->u.fld[3]).rt_rtvec))->num_elem); |
| 2088 | for (i = 0; i < n; i++) |
| 2089 | { |
| 2090 | if (operand_locs) |
| 2091 | operand_locs[nbase + i] = &ASM_OPERANDS_INPUT (asmop, i)(((((asmop)->u.fld[3]).rt_rtvec))->elem[i]); |
| 2092 | if (operands) |
| 2093 | operands[nbase + i] = ASM_OPERANDS_INPUT (asmop, i)(((((asmop)->u.fld[3]).rt_rtvec))->elem[i]); |
| 2094 | if (constraints) |
| 2095 | constraints[nbase + i] = ASM_OPERANDS_INPUT_CONSTRAINT (asmop, i)((((((((asmop)->u.fld[4]).rt_rtvec))->elem[i]))->u.fld [0]).rt_str); |
| 2096 | if (modes) |
| 2097 | modes[nbase + i] = ASM_OPERANDS_INPUT_MODE (asmop, i)((machine_mode) ((((((asmop)->u.fld[4]).rt_rtvec))->elem [i]))->mode); |
| 2098 | } |
| 2099 | nbase += n; |
| 2100 | |
| 2101 | n = ASM_OPERANDS_LABEL_LENGTH (asmop)(((((asmop)->u.fld[5]).rt_rtvec))->num_elem); |
| 2102 | for (i = 0; i < n; i++) |
| 2103 | { |
| 2104 | if (operand_locs) |
| 2105 | operand_locs[nbase + i] = &ASM_OPERANDS_LABEL (asmop, i)(((((asmop)->u.fld[5]).rt_rtvec))->elem[i]); |
| 2106 | if (operands) |
| 2107 | operands[nbase + i] = ASM_OPERANDS_LABEL (asmop, i)(((((asmop)->u.fld[5]).rt_rtvec))->elem[i]); |
| 2108 | if (constraints) |
| 2109 | constraints[nbase + i] = ""; |
| 2110 | if (modes) |
| 2111 | modes[nbase + i] = Pmode(global_options.x_ix86_pmode == PMODE_DI ? (scalar_int_mode ( (scalar_int_mode::from_int) E_DImode)) : (scalar_int_mode ((scalar_int_mode ::from_int) E_SImode))); |
| 2112 | } |
| 2113 | |
| 2114 | if (loc) |
| 2115 | *loc = ASM_OPERANDS_SOURCE_LOCATION (asmop)(((asmop)->u.fld[6]).rt_uint); |
| 2116 | |
| 2117 | return ASM_OPERANDS_TEMPLATE (asmop)(((asmop)->u.fld[0]).rt_str); |
| 2118 | } |
| 2119 | |
| 2120 | /* Parse inline assembly string STRING and determine which operands are |
| 2121 | referenced by % markers. For the first NOPERANDS operands, set USED[I] |
| 2122 | to true if operand I is referenced. |
| 2123 | |
| 2124 | This is intended to distinguish barrier-like asms such as: |
| 2125 | |
| 2126 | asm ("" : "=m" (...)); |
| 2127 | |
| 2128 | from real references such as: |
| 2129 | |
| 2130 | asm ("sw\t$0, %0" : "=m" (...)); */ |
| 2131 | |
| 2132 | void |
| 2133 | get_referenced_operands (const char *string, bool *used, |
| 2134 | unsigned int noperands) |
| 2135 | { |
| 2136 | memset (used, 0, sizeof (bool) * noperands); |
| 2137 | const char *p = string; |
| 2138 | while (*p) |
| 2139 | switch (*p) |
| 2140 | { |
| 2141 | case '%': |
| 2142 | p += 1; |
| 2143 | /* A letter followed by a digit indicates an operand number. */ |
| 2144 | if (ISALPHA (p[0])(_sch_istable[(p[0]) & 0xff] & (unsigned short)(_sch_isalpha )) && ISDIGIT (p[1])(_sch_istable[(p[1]) & 0xff] & (unsigned short)(_sch_isdigit ))) |
| 2145 | p += 1; |
| 2146 | if (ISDIGIT (*p)(_sch_istable[(*p) & 0xff] & (unsigned short)(_sch_isdigit ))) |
| 2147 | { |
| 2148 | char *endptr; |
| 2149 | unsigned long opnum = strtoul (p, &endptr, 10); |
| 2150 | if (endptr != p && opnum < noperands) |
| 2151 | used[opnum] = true; |
| 2152 | p = endptr; |
| 2153 | } |
| 2154 | else |
| 2155 | p += 1; |
| 2156 | break; |
| 2157 | |
| 2158 | default: |
| 2159 | p++; |
| 2160 | break; |
| 2161 | } |
| 2162 | } |
| 2163 | |
| 2164 | /* Check if an asm_operand matches its constraints. |
| 2165 | Return > 0 if ok, = 0 if bad, < 0 if inconclusive. */ |
| 2166 | |
| 2167 | int |
| 2168 | asm_operand_ok (rtx op, const char *constraint, const char **constraints) |
| 2169 | { |
| 2170 | int result = 0; |
| 2171 | bool incdec_ok = false; |
| 2172 | |
| 2173 | /* Use constrain_operands after reload. */ |
| 2174 | gcc_assert (!reload_completed)((void)(!(!reload_completed) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2174, __FUNCTION__), 0 : 0)); |
| 2175 | |
| 2176 | /* Empty constraint string is the same as "X,...,X", i.e. X for as |
| 2177 | many alternatives as required to match the other operands. */ |
| 2178 | if (*constraint == '\0') |
| 2179 | result = 1; |
| 2180 | |
| 2181 | while (*constraint) |
| 2182 | { |
| 2183 | enum constraint_num cn; |
| 2184 | char c = *constraint; |
| 2185 | int len; |
| 2186 | switch (c) |
| 2187 | { |
| 2188 | case ',': |
| 2189 | constraint++; |
| 2190 | continue; |
| 2191 | |
| 2192 | case '0': case '1': case '2': case '3': case '4': |
| 2193 | case '5': case '6': case '7': case '8': case '9': |
| 2194 | /* If caller provided constraints pointer, look up |
| 2195 | the matching constraint. Otherwise, our caller should have |
| 2196 | given us the proper matching constraint, but we can't |
| 2197 | actually fail the check if they didn't. Indicate that |
| 2198 | results are inconclusive. */ |
| 2199 | if (constraints) |
| 2200 | { |
| 2201 | char *end; |
| 2202 | unsigned long match; |
| 2203 | |
| 2204 | match = strtoul (constraint, &end, 10); |
| 2205 | if (!result) |
| 2206 | result = asm_operand_ok (op, constraints[match], NULLnullptr); |
| 2207 | constraint = (const char *) end; |
| 2208 | } |
| 2209 | else |
| 2210 | { |
| 2211 | do |
| 2212 | constraint++; |
| 2213 | while (ISDIGIT (*constraint)(_sch_istable[(*constraint) & 0xff] & (unsigned short )(_sch_isdigit))); |
| 2214 | if (! result) |
| 2215 | result = -1; |
| 2216 | } |
| 2217 | continue; |
| 2218 | |
| 2219 | /* The rest of the compiler assumes that reloading the address |
| 2220 | of a MEM into a register will make it fit an 'o' constraint. |
| 2221 | That is, if it sees a MEM operand for an 'o' constraint, |
| 2222 | it assumes that (mem (base-reg)) will fit. |
| 2223 | |
| 2224 | That assumption fails on targets that don't have offsettable |
| 2225 | addresses at all. We therefore need to treat 'o' asm |
| 2226 | constraints as a special case and only accept operands that |
| 2227 | are already offsettable, thus proving that at least one |
| 2228 | offsettable address exists. */ |
| 2229 | case 'o': /* offsettable */ |
| 2230 | if (offsettable_nonstrict_memref_p (op)) |
| 2231 | result = 1; |
| 2232 | break; |
| 2233 | |
| 2234 | case 'g': |
| 2235 | if (general_operand (op, VOIDmode((void) 0, E_VOIDmode))) |
| 2236 | result = 1; |
| 2237 | break; |
| 2238 | |
| 2239 | case '<': |
| 2240 | case '>': |
| 2241 | /* ??? Before auto-inc-dec, auto inc/dec insns are not supposed |
| 2242 | to exist, excepting those that expand_call created. Further, |
| 2243 | on some machines which do not have generalized auto inc/dec, |
| 2244 | an inc/dec is not a memory_operand. |
| 2245 | |
| 2246 | Match any memory and hope things are resolved after reload. */ |
| 2247 | incdec_ok = true; |
| 2248 | /* FALLTHRU */ |
| 2249 | default: |
| 2250 | cn = lookup_constraint (constraint); |
| 2251 | rtx mem = NULLnullptr; |
| 2252 | switch (get_constraint_type (cn)) |
| 2253 | { |
| 2254 | case CT_REGISTER: |
| 2255 | if (!result |
| 2256 | && reg_class_for_constraint (cn) != NO_REGS |
| 2257 | && GET_MODE (op)((machine_mode) (op)->mode) != BLKmode((void) 0, E_BLKmode) |
| 2258 | && register_operand (op, VOIDmode((void) 0, E_VOIDmode))) |
| 2259 | result = 1; |
| 2260 | break; |
| 2261 | |
| 2262 | case CT_CONST_INT: |
| 2263 | if (!result |
| 2264 | && CONST_INT_P (op)(((enum rtx_code) (op)->code) == CONST_INT) |
| 2265 | && insn_const_int_ok_for_constraint (INTVAL (op)((op)->u.hwint[0]), cn)) |
| 2266 | result = 1; |
| 2267 | break; |
| 2268 | |
| 2269 | case CT_MEMORY: |
| 2270 | mem = op; |
| 2271 | /* Fall through. */ |
| 2272 | case CT_SPECIAL_MEMORY: |
| 2273 | /* Every memory operand can be reloaded to fit. */ |
| 2274 | if (!mem) |
| 2275 | mem = extract_mem_from_operand (op); |
| 2276 | result = result || memory_operand (mem, VOIDmode((void) 0, E_VOIDmode)); |
| 2277 | break; |
| 2278 | |
| 2279 | case CT_ADDRESS: |
| 2280 | /* Every address operand can be reloaded to fit. */ |
| 2281 | result = result || address_operand (op, VOIDmode((void) 0, E_VOIDmode)); |
| 2282 | break; |
| 2283 | |
| 2284 | case CT_FIXED_FORM: |
| 2285 | result = result || constraint_satisfied_p (op, cn); |
| 2286 | break; |
| 2287 | } |
| 2288 | break; |
| 2289 | } |
| 2290 | len = CONSTRAINT_LEN (c, constraint)insn_constraint_len (c,constraint); |
| 2291 | do |
| 2292 | constraint++; |
| 2293 | while (--len && *constraint && *constraint != ','); |
| 2294 | if (len) |
| 2295 | return 0; |
| 2296 | } |
| 2297 | |
| 2298 | /* For operands without < or > constraints reject side-effects. */ |
| 2299 | if (AUTO_INC_DEC0 && !incdec_ok && result && MEM_P (op)(((enum rtx_code) (op)->code) == MEM)) |
| 2300 | switch (GET_CODE (XEXP (op, 0))((enum rtx_code) ((((op)->u.fld[0]).rt_rtx))->code)) |
| 2301 | { |
| 2302 | case PRE_INC: |
| 2303 | case POST_INC: |
| 2304 | case PRE_DEC: |
| 2305 | case POST_DEC: |
| 2306 | case PRE_MODIFY: |
| 2307 | case POST_MODIFY: |
| 2308 | return 0; |
| 2309 | default: |
| 2310 | break; |
| 2311 | } |
| 2312 | |
| 2313 | return result; |
| 2314 | } |
| 2315 | |
| 2316 | /* Given an rtx *P, if it is a sum containing an integer constant term, |
| 2317 | return the location (type rtx *) of the pointer to that constant term. |
| 2318 | Otherwise, return a null pointer. */ |
| 2319 | |
| 2320 | rtx * |
| 2321 | find_constant_term_loc (rtx *p) |
| 2322 | { |
| 2323 | rtx *tem; |
| 2324 | enum rtx_code code = GET_CODE (*p)((enum rtx_code) (*p)->code); |
| 2325 | |
| 2326 | /* If *P IS such a constant term, P is its location. */ |
| 2327 | |
| 2328 | if (code == CONST_INT || code == SYMBOL_REF || code == LABEL_REF |
| 2329 | || code == CONST) |
| 2330 | return p; |
| 2331 | |
| 2332 | /* Otherwise, if not a sum, it has no constant term. */ |
| 2333 | |
| 2334 | if (GET_CODE (*p)((enum rtx_code) (*p)->code) != PLUS) |
| 2335 | return 0; |
| 2336 | |
| 2337 | /* If one of the summands is constant, return its location. */ |
| 2338 | |
| 2339 | if (XEXP (*p, 0)(((*p)->u.fld[0]).rt_rtx) && CONSTANT_P (XEXP (*p, 0))((rtx_class[(int) (((enum rtx_code) ((((*p)->u.fld[0]).rt_rtx ))->code))]) == RTX_CONST_OBJ) |
| 2340 | && XEXP (*p, 1)(((*p)->u.fld[1]).rt_rtx) && CONSTANT_P (XEXP (*p, 1))((rtx_class[(int) (((enum rtx_code) ((((*p)->u.fld[1]).rt_rtx ))->code))]) == RTX_CONST_OBJ)) |
| 2341 | return p; |
| 2342 | |
| 2343 | /* Otherwise, check each summand for containing a constant term. */ |
| 2344 | |
| 2345 | if (XEXP (*p, 0)(((*p)->u.fld[0]).rt_rtx) != 0) |
| 2346 | { |
| 2347 | tem = find_constant_term_loc (&XEXP (*p, 0)(((*p)->u.fld[0]).rt_rtx)); |
| 2348 | if (tem != 0) |
| 2349 | return tem; |
| 2350 | } |
| 2351 | |
| 2352 | if (XEXP (*p, 1)(((*p)->u.fld[1]).rt_rtx) != 0) |
| 2353 | { |
| 2354 | tem = find_constant_term_loc (&XEXP (*p, 1)(((*p)->u.fld[1]).rt_rtx)); |
| 2355 | if (tem != 0) |
| 2356 | return tem; |
| 2357 | } |
| 2358 | |
| 2359 | return 0; |
| 2360 | } |
| 2361 | |
| 2362 | /* Return 1 if OP is a memory reference |
| 2363 | whose address contains no side effects |
| 2364 | and remains valid after the addition |
| 2365 | of a positive integer less than the |
| 2366 | size of the object being referenced. |
| 2367 | |
| 2368 | We assume that the original address is valid and do not check it. |
| 2369 | |
| 2370 | This uses strict_memory_address_p as a subroutine, so |
| 2371 | don't use it before reload. */ |
| 2372 | |
| 2373 | int |
| 2374 | offsettable_memref_p (rtx op) |
| 2375 | { |
| 2376 | return ((MEM_P (op)(((enum rtx_code) (op)->code) == MEM)) |
| 2377 | && offsettable_address_addr_space_p (1, GET_MODE (op)((machine_mode) (op)->mode), XEXP (op, 0)(((op)->u.fld[0]).rt_rtx), |
| 2378 | MEM_ADDR_SPACE (op)(get_mem_attrs (op)->addrspace))); |
| 2379 | } |
| 2380 | |
| 2381 | /* Similar, but don't require a strictly valid mem ref: |
| 2382 | consider pseudo-regs valid as index or base regs. */ |
| 2383 | |
| 2384 | int |
| 2385 | offsettable_nonstrict_memref_p (rtx op) |
| 2386 | { |
| 2387 | return ((MEM_P (op)(((enum rtx_code) (op)->code) == MEM)) |
| 2388 | && offsettable_address_addr_space_p (0, GET_MODE (op)((machine_mode) (op)->mode), XEXP (op, 0)(((op)->u.fld[0]).rt_rtx), |
| 2389 | MEM_ADDR_SPACE (op)(get_mem_attrs (op)->addrspace))); |
| 2390 | } |
| 2391 | |
| 2392 | /* Return 1 if Y is a memory address which contains no side effects |
| 2393 | and would remain valid for address space AS after the addition of |
| 2394 | a positive integer less than the size of that mode. |
| 2395 | |
| 2396 | We assume that the original address is valid and do not check it. |
| 2397 | We do check that it is valid for narrower modes. |
| 2398 | |
| 2399 | If STRICTP is nonzero, we require a strictly valid address, |
| 2400 | for the sake of use in reload.c. */ |
| 2401 | |
| 2402 | int |
| 2403 | offsettable_address_addr_space_p (int strictp, machine_mode mode, rtx y, |
| 2404 | addr_space_t as) |
| 2405 | { |
| 2406 | enum rtx_code ycode = GET_CODE (y)((enum rtx_code) (y)->code); |
| 2407 | rtx z; |
| 2408 | rtx y1 = y; |
| 2409 | rtx *y2; |
| 2410 | int (*addressp) (machine_mode, rtx, addr_space_t) = |
| 2411 | (strictp ? strict_memory_address_addr_space_p |
| 2412 | : memory_address_addr_space_p); |
| 2413 | poly_int64 mode_sz = GET_MODE_SIZE (mode); |
| 2414 | |
| 2415 | if (CONSTANT_ADDRESS_P (y)constant_address_p (y)) |
| 2416 | return 1; |
| 2417 | |
| 2418 | /* Adjusting an offsettable address involves changing to a narrower mode. |
| 2419 | Make sure that's OK. */ |
| 2420 | |
| 2421 | if (mode_dependent_address_p (y, as)) |
| 2422 | return 0; |
| 2423 | |
| 2424 | machine_mode address_mode = GET_MODE (y)((machine_mode) (y)->mode); |
| 2425 | if (address_mode == VOIDmode((void) 0, E_VOIDmode)) |
| 2426 | address_mode = targetm.addr_space.address_mode (as); |
| 2427 | #ifdef POINTERS_EXTEND_UNSIGNED1 |
| 2428 | machine_mode pointer_mode = targetm.addr_space.pointer_mode (as); |
| 2429 | #endif |
| 2430 | |
| 2431 | /* ??? How much offset does an offsettable BLKmode reference need? |
| 2432 | Clearly that depends on the situation in which it's being used. |
| 2433 | However, the current situation in which we test 0xffffffff is |
| 2434 | less than ideal. Caveat user. */ |
| 2435 | if (known_eq (mode_sz, 0)(!maybe_ne (mode_sz, 0))) |
| 2436 | mode_sz = BIGGEST_ALIGNMENT(((global_options.x_target_flags & (1U << 12)) != 0 ) ? 32 : (((global_options.x_ix86_isa_flags & (1UL << 15)) != 0) ? 512 : (((global_options.x_ix86_isa_flags & ( 1UL << 8)) != 0) ? 256 : 128))) / BITS_PER_UNIT(8); |
| 2437 | |
| 2438 | /* If the expression contains a constant term, |
| 2439 | see if it remains valid when max possible offset is added. */ |
| 2440 | |
| 2441 | if ((ycode == PLUS) && (y2 = find_constant_term_loc (&y1))) |
| 2442 | { |
| 2443 | int good; |
| 2444 | |
| 2445 | y1 = *y2; |
| 2446 | *y2 = plus_constant (address_mode, *y2, mode_sz - 1); |
| 2447 | /* Use QImode because an odd displacement may be automatically invalid |
| 2448 | for any wider mode. But it should be valid for a single byte. */ |
| 2449 | good = (*addressp) (QImode(scalar_int_mode ((scalar_int_mode::from_int) E_QImode)), y, as); |
| 2450 | |
| 2451 | /* In any case, restore old contents of memory. */ |
| 2452 | *y2 = y1; |
| 2453 | return good; |
| 2454 | } |
| 2455 | |
| 2456 | if (GET_RTX_CLASS (ycode)(rtx_class[(int) (ycode)]) == RTX_AUTOINC) |
| 2457 | return 0; |
| 2458 | |
| 2459 | /* The offset added here is chosen as the maximum offset that |
| 2460 | any instruction could need to add when operating on something |
| 2461 | of the specified mode. We assume that if Y and Y+c are |
| 2462 | valid addresses then so is Y+d for all 0<d<c. adjust_address will |
| 2463 | go inside a LO_SUM here, so we do so as well. */ |
| 2464 | if (GET_CODE (y)((enum rtx_code) (y)->code) == LO_SUM |
| 2465 | && mode != BLKmode((void) 0, E_BLKmode) |
| 2466 | && known_le (mode_sz, GET_MODE_ALIGNMENT (mode) / BITS_PER_UNIT)(!maybe_lt (get_mode_alignment (mode) / (8), mode_sz))) |
| 2467 | z = gen_rtx_LO_SUM (address_mode, XEXP (y, 0),gen_rtx_fmt_ee_stat ((LO_SUM), ((address_mode)), (((((y)-> u.fld[0]).rt_rtx))), ((plus_constant (address_mode, (((y)-> u.fld[1]).rt_rtx), mode_sz - 1))) ) |
| 2468 | plus_constant (address_mode, XEXP (y, 1),gen_rtx_fmt_ee_stat ((LO_SUM), ((address_mode)), (((((y)-> u.fld[0]).rt_rtx))), ((plus_constant (address_mode, (((y)-> u.fld[1]).rt_rtx), mode_sz - 1))) ) |
| 2469 | mode_sz - 1))gen_rtx_fmt_ee_stat ((LO_SUM), ((address_mode)), (((((y)-> u.fld[0]).rt_rtx))), ((plus_constant (address_mode, (((y)-> u.fld[1]).rt_rtx), mode_sz - 1))) ); |
| 2470 | #ifdef POINTERS_EXTEND_UNSIGNED1 |
| 2471 | /* Likewise for a ZERO_EXTEND from pointer_mode. */ |
| 2472 | else if (POINTERS_EXTEND_UNSIGNED1 > 0 |
| 2473 | && GET_CODE (y)((enum rtx_code) (y)->code) == ZERO_EXTEND |
| 2474 | && GET_MODE (XEXP (y, 0))((machine_mode) ((((y)->u.fld[0]).rt_rtx))->mode) == pointer_mode) |
| 2475 | z = gen_rtx_ZERO_EXTEND (address_mode,gen_rtx_fmt_e_stat ((ZERO_EXTEND), ((address_mode)), ((plus_constant (pointer_mode, (((y)->u.fld[0]).rt_rtx), mode_sz - 1))) ) |
| 2476 | plus_constant (pointer_mode, XEXP (y, 0),gen_rtx_fmt_e_stat ((ZERO_EXTEND), ((address_mode)), ((plus_constant (pointer_mode, (((y)->u.fld[0]).rt_rtx), mode_sz - 1))) ) |
| 2477 | mode_sz - 1))gen_rtx_fmt_e_stat ((ZERO_EXTEND), ((address_mode)), ((plus_constant (pointer_mode, (((y)->u.fld[0]).rt_rtx), mode_sz - 1))) ); |
| 2478 | #endif |
| 2479 | else |
| 2480 | z = plus_constant (address_mode, y, mode_sz - 1); |
| 2481 | |
| 2482 | /* Use QImode because an odd displacement may be automatically invalid |
| 2483 | for any wider mode. But it should be valid for a single byte. */ |
| 2484 | return (*addressp) (QImode(scalar_int_mode ((scalar_int_mode::from_int) E_QImode)), z, as); |
| 2485 | } |
| 2486 | |
| 2487 | /* Return 1 if ADDR is an address-expression whose effect depends |
| 2488 | on the mode of the memory reference it is used in. |
| 2489 | |
| 2490 | ADDRSPACE is the address space associated with the address. |
| 2491 | |
| 2492 | Autoincrement addressing is a typical example of mode-dependence |
| 2493 | because the amount of the increment depends on the mode. */ |
| 2494 | |
| 2495 | bool |
| 2496 | mode_dependent_address_p (rtx addr, addr_space_t addrspace) |
| 2497 | { |
| 2498 | /* Auto-increment addressing with anything other than post_modify |
| 2499 | or pre_modify always introduces a mode dependency. Catch such |
| 2500 | cases now instead of deferring to the target. */ |
| 2501 | if (GET_CODE (addr)((enum rtx_code) (addr)->code) == PRE_INC |
| 2502 | || GET_CODE (addr)((enum rtx_code) (addr)->code) == POST_INC |
| 2503 | || GET_CODE (addr)((enum rtx_code) (addr)->code) == PRE_DEC |
| 2504 | || GET_CODE (addr)((enum rtx_code) (addr)->code) == POST_DEC) |
| 2505 | return true; |
| 2506 | |
| 2507 | return targetm.mode_dependent_address_p (addr, addrspace); |
| 2508 | } |
| 2509 | |
| 2510 | /* Return true if boolean attribute ATTR is supported. */ |
| 2511 | |
| 2512 | static bool |
| 2513 | have_bool_attr (bool_attr attr) |
| 2514 | { |
| 2515 | switch (attr) |
| 2516 | { |
| 2517 | case BA_ENABLED: |
| 2518 | return HAVE_ATTR_enabled1; |
| 2519 | case BA_PREFERRED_FOR_SIZE: |
| 2520 | return HAVE_ATTR_enabled1 || HAVE_ATTR_preferred_for_size1; |
| 2521 | case BA_PREFERRED_FOR_SPEED: |
| 2522 | return HAVE_ATTR_enabled1 || HAVE_ATTR_preferred_for_speed1; |
| 2523 | } |
| 2524 | gcc_unreachable ()(fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2524, __FUNCTION__)); |
| 2525 | } |
| 2526 | |
| 2527 | /* Return the value of ATTR for instruction INSN. */ |
| 2528 | |
| 2529 | static bool |
| 2530 | get_bool_attr (rtx_insn *insn, bool_attr attr) |
| 2531 | { |
| 2532 | switch (attr) |
| 2533 | { |
| 2534 | case BA_ENABLED: |
| 2535 | return get_attr_enabled (insn); |
| 2536 | case BA_PREFERRED_FOR_SIZE: |
| 2537 | return get_attr_enabled (insn) && get_attr_preferred_for_size (insn); |
| 2538 | case BA_PREFERRED_FOR_SPEED: |
| 2539 | return get_attr_enabled (insn) && get_attr_preferred_for_speed (insn); |
| 2540 | } |
| 2541 | gcc_unreachable ()(fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2541, __FUNCTION__)); |
| 2542 | } |
| 2543 | |
| 2544 | /* Like get_bool_attr_mask, but don't use the cache. */ |
| 2545 | |
| 2546 | static alternative_mask |
| 2547 | get_bool_attr_mask_uncached (rtx_insn *insn, bool_attr attr) |
| 2548 | { |
| 2549 | /* Temporarily install enough information for get_attr_<foo> to assume |
| 2550 | that the insn operands are already cached. As above, the attribute |
| 2551 | mustn't depend on the values of operands, so we don't provide their |
| 2552 | real values here. */ |
| 2553 | rtx_insn *old_insn = recog_data.insn; |
| 2554 | int old_alternative = which_alternative; |
| 2555 | |
| 2556 | recog_data.insn = insn; |
| 2557 | alternative_mask mask = ALL_ALTERNATIVES((alternative_mask) -1); |
| 2558 | int n_alternatives = insn_data[INSN_CODE (insn)(((insn)->u.fld[5]).rt_int)].n_alternatives; |
| 2559 | for (int i = 0; i < n_alternatives; i++) |
| 2560 | { |
| 2561 | which_alternative = i; |
| 2562 | if (!get_bool_attr (insn, attr)) |
| 2563 | mask &= ~ALTERNATIVE_BIT (i)((alternative_mask) 1 << (i)); |
| 2564 | } |
| 2565 | |
| 2566 | recog_data.insn = old_insn; |
| 2567 | which_alternative = old_alternative; |
| 2568 | return mask; |
| 2569 | } |
| 2570 | |
| 2571 | /* Return the mask of operand alternatives that are allowed for INSN |
| 2572 | by boolean attribute ATTR. This mask depends only on INSN and on |
| 2573 | the current target; it does not depend on things like the values of |
| 2574 | operands. */ |
| 2575 | |
| 2576 | static alternative_mask |
| 2577 | get_bool_attr_mask (rtx_insn *insn, bool_attr attr) |
| 2578 | { |
| 2579 | /* Quick exit for asms and for targets that don't use these attributes. */ |
| 2580 | int code = INSN_CODE (insn)(((insn)->u.fld[5]).rt_int); |
| 2581 | if (code < 0 || !have_bool_attr (attr)) |
| 2582 | return ALL_ALTERNATIVES((alternative_mask) -1); |
| 2583 | |
| 2584 | /* Calling get_attr_<foo> can be expensive, so cache the mask |
| 2585 | for speed. */ |
| 2586 | if (!this_target_recog->x_bool_attr_masks[code][attr]) |
| 2587 | this_target_recog->x_bool_attr_masks[code][attr] |
| 2588 | = get_bool_attr_mask_uncached (insn, attr); |
| 2589 | return this_target_recog->x_bool_attr_masks[code][attr]; |
| 2590 | } |
| 2591 | |
| 2592 | /* Return the set of alternatives of INSN that are allowed by the current |
| 2593 | target. */ |
| 2594 | |
| 2595 | alternative_mask |
| 2596 | get_enabled_alternatives (rtx_insn *insn) |
| 2597 | { |
| 2598 | return get_bool_attr_mask (insn, BA_ENABLED); |
| 2599 | } |
| 2600 | |
| 2601 | /* Return the set of alternatives of INSN that are allowed by the current |
| 2602 | target and are preferred for the current size/speed optimization |
| 2603 | choice. */ |
| 2604 | |
| 2605 | alternative_mask |
| 2606 | get_preferred_alternatives (rtx_insn *insn) |
| 2607 | { |
| 2608 | if (optimize_bb_for_speed_p (BLOCK_FOR_INSN (insn))) |
| 2609 | return get_bool_attr_mask (insn, BA_PREFERRED_FOR_SPEED); |
| 2610 | else |
| 2611 | return get_bool_attr_mask (insn, BA_PREFERRED_FOR_SIZE); |
| 2612 | } |
| 2613 | |
| 2614 | /* Return the set of alternatives of INSN that are allowed by the current |
| 2615 | target and are preferred for the size/speed optimization choice |
| 2616 | associated with BB. Passing a separate BB is useful if INSN has not |
| 2617 | been emitted yet or if we are considering moving it to a different |
| 2618 | block. */ |
| 2619 | |
| 2620 | alternative_mask |
| 2621 | get_preferred_alternatives (rtx_insn *insn, basic_block bb) |
| 2622 | { |
| 2623 | if (optimize_bb_for_speed_p (bb)) |
| 2624 | return get_bool_attr_mask (insn, BA_PREFERRED_FOR_SPEED); |
| 2625 | else |
| 2626 | return get_bool_attr_mask (insn, BA_PREFERRED_FOR_SIZE); |
| 2627 | } |
| 2628 | |
| 2629 | /* Assert that the cached boolean attributes for INSN are still accurate. |
| 2630 | The backend is required to define these attributes in a way that only |
| 2631 | depends on the current target (rather than operands, compiler phase, |
| 2632 | etc.). */ |
| 2633 | |
| 2634 | bool |
| 2635 | check_bool_attrs (rtx_insn *insn) |
| 2636 | { |
| 2637 | int code = INSN_CODE (insn)(((insn)->u.fld[5]).rt_int); |
| 2638 | if (code >= 0) |
| 2639 | for (int i = 0; i <= BA_LAST; ++i) |
| 2640 | { |
| 2641 | enum bool_attr attr = (enum bool_attr) i; |
| 2642 | if (this_target_recog->x_bool_attr_masks[code][attr]) |
| 2643 | gcc_assert (this_target_recog->x_bool_attr_masks[code][attr]((void)(!(this_target_recog->x_bool_attr_masks[code][attr] == get_bool_attr_mask_uncached (insn, attr)) ? fancy_abort ( "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2644, __FUNCTION__), 0 : 0)) |
| 2644 | == get_bool_attr_mask_uncached (insn, attr))((void)(!(this_target_recog->x_bool_attr_masks[code][attr] == get_bool_attr_mask_uncached (insn, attr)) ? fancy_abort ( "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2644, __FUNCTION__), 0 : 0)); |
| 2645 | } |
| 2646 | return true; |
| 2647 | } |
| 2648 | |
| 2649 | /* Like extract_insn, but save insn extracted and don't extract again, when |
| 2650 | called again for the same insn expecting that recog_data still contain the |
| 2651 | valid information. This is used primary by gen_attr infrastructure that |
| 2652 | often does extract insn again and again. */ |
| 2653 | void |
| 2654 | extract_insn_cached (rtx_insn *insn) |
| 2655 | { |
| 2656 | if (recog_data.insn == insn && INSN_CODE (insn)(((insn)->u.fld[5]).rt_int) >= 0) |
| 2657 | return; |
| 2658 | extract_insn (insn); |
| 2659 | recog_data.insn = insn; |
| 2660 | } |
| 2661 | |
| 2662 | /* Do uncached extract_insn, constrain_operands and complain about failures. |
| 2663 | This should be used when extracting a pre-existing constrained instruction |
| 2664 | if the caller wants to know which alternative was chosen. */ |
| 2665 | void |
| 2666 | extract_constrain_insn (rtx_insn *insn) |
| 2667 | { |
| 2668 | extract_insn (insn); |
| 2669 | if (!constrain_operands (reload_completed, get_enabled_alternatives (insn))) |
| 2670 | fatal_insn_not_found (insn)_fatal_insn_not_found (insn, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2670, __FUNCTION__); |
| 2671 | } |
| 2672 | |
| 2673 | /* Do cached extract_insn, constrain_operands and complain about failures. |
| 2674 | Used by insn_attrtab. */ |
| 2675 | void |
| 2676 | extract_constrain_insn_cached (rtx_insn *insn) |
| 2677 | { |
| 2678 | extract_insn_cached (insn); |
| 2679 | if (which_alternative == -1 |
| 2680 | && !constrain_operands (reload_completed, |
| 2681 | get_enabled_alternatives (insn))) |
| 2682 | fatal_insn_not_found (insn)_fatal_insn_not_found (insn, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2682, __FUNCTION__); |
| 2683 | } |
| 2684 | |
| 2685 | /* Do cached constrain_operands on INSN and complain about failures. */ |
| 2686 | int |
| 2687 | constrain_operands_cached (rtx_insn *insn, int strict) |
| 2688 | { |
| 2689 | if (which_alternative == -1) |
| 2690 | return constrain_operands (strict, get_enabled_alternatives (insn)); |
| 2691 | else |
| 2692 | return 1; |
| 2693 | } |
| 2694 | |
| 2695 | /* Analyze INSN and fill in recog_data. */ |
| 2696 | |
| 2697 | void |
| 2698 | extract_insn (rtx_insn *insn) |
| 2699 | { |
| 2700 | int i; |
| 2701 | int icode; |
| 2702 | int noperands; |
| 2703 | rtx body = PATTERN (insn); |
| 2704 | |
| 2705 | recog_data.n_operands = 0; |
| 2706 | recog_data.n_alternatives = 0; |
| 2707 | recog_data.n_dups = 0; |
| 2708 | recog_data.is_asm = false; |
| 2709 | |
| 2710 | switch (GET_CODE (body)((enum rtx_code) (body)->code)) |
| 2711 | { |
| 2712 | case USE: |
| 2713 | case CLOBBER: |
| 2714 | case ASM_INPUT: |
| 2715 | case ADDR_VEC: |
| 2716 | case ADDR_DIFF_VEC: |
| 2717 | case VAR_LOCATION: |
| 2718 | case DEBUG_MARKER: |
| 2719 | return; |
| 2720 | |
| 2721 | case SET: |
| 2722 | if (GET_CODE (SET_SRC (body))((enum rtx_code) ((((body)->u.fld[1]).rt_rtx))->code) == ASM_OPERANDS) |
| 2723 | goto asm_insn; |
| 2724 | else |
| 2725 | goto normal_insn; |
| 2726 | case PARALLEL: |
| 2727 | if ((GET_CODE (XVECEXP (body, 0, 0))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [0]))->code) == SET |
| 2728 | && GET_CODE (SET_SRC (XVECEXP (body, 0, 0)))((enum rtx_code) (((((((((body)->u.fld[0]).rt_rtvec))-> elem[0]))->u.fld[1]).rt_rtx))->code) == ASM_OPERANDS) |
| 2729 | || GET_CODE (XVECEXP (body, 0, 0))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [0]))->code) == ASM_OPERANDS |
| 2730 | || GET_CODE (XVECEXP (body, 0, 0))((enum rtx_code) ((((((body)->u.fld[0]).rt_rtvec))->elem [0]))->code) == ASM_INPUT) |
| 2731 | goto asm_insn; |
| 2732 | else |
| 2733 | goto normal_insn; |
| 2734 | case ASM_OPERANDS: |
| 2735 | asm_insn: |
| 2736 | recog_data.n_operands = noperands = asm_noperands (body); |
| 2737 | if (noperands >= 0) |
| 2738 | { |
| 2739 | /* This insn is an `asm' with operands. */ |
| 2740 | |
| 2741 | /* expand_asm_operands makes sure there aren't too many operands. */ |
| 2742 | gcc_assert (noperands <= MAX_RECOG_OPERANDS)((void)(!(noperands <= 30) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2742, __FUNCTION__), 0 : 0)); |
| 2743 | |
| 2744 | /* Now get the operand values and constraints out of the insn. */ |
| 2745 | decode_asm_operands (body, recog_data.operand, |
| 2746 | recog_data.operand_loc, |
| 2747 | recog_data.constraints, |
| 2748 | recog_data.operand_mode, NULLnullptr); |
| 2749 | memset (recog_data.is_operator, 0, sizeof recog_data.is_operator); |
| 2750 | if (noperands > 0) |
| 2751 | { |
| 2752 | const char *p = recog_data.constraints[0]; |
| 2753 | recog_data.n_alternatives = 1; |
| 2754 | while (*p) |
| 2755 | recog_data.n_alternatives += (*p++ == ','); |
| 2756 | } |
| 2757 | recog_data.is_asm = true; |
| 2758 | break; |
| 2759 | } |
| 2760 | fatal_insn_not_found (insn)_fatal_insn_not_found (insn, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2760, __FUNCTION__); |
| 2761 | |
| 2762 | default: |
| 2763 | normal_insn: |
| 2764 | /* Ordinary insn: recognize it, get the operands via insn_extract |
| 2765 | and get the constraints. */ |
| 2766 | |
| 2767 | icode = recog_memoized (insn); |
| 2768 | if (icode < 0) |
| 2769 | fatal_insn_not_found (insn)_fatal_insn_not_found (insn, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2769, __FUNCTION__); |
| 2770 | |
| 2771 | recog_data.n_operands = noperands = insn_data[icode].n_operands; |
| 2772 | recog_data.n_alternatives = insn_data[icode].n_alternatives; |
| 2773 | recog_data.n_dups = insn_data[icode].n_dups; |
| 2774 | |
| 2775 | insn_extract (insn); |
| 2776 | |
| 2777 | for (i = 0; i < noperands; i++) |
| 2778 | { |
| 2779 | recog_data.constraints[i] = insn_data[icode].operand[i].constraint; |
| 2780 | recog_data.is_operator[i] = insn_data[icode].operand[i].is_operator; |
| 2781 | recog_data.operand_mode[i] = insn_data[icode].operand[i].mode; |
| 2782 | /* VOIDmode match_operands gets mode from their real operand. */ |
| 2783 | if (recog_data.operand_mode[i] == VOIDmode((void) 0, E_VOIDmode)) |
| 2784 | recog_data.operand_mode[i] = GET_MODE (recog_data.operand[i])((machine_mode) (recog_data.operand[i])->mode); |
| 2785 | } |
| 2786 | } |
| 2787 | for (i = 0; i < noperands; i++) |
| 2788 | recog_data.operand_type[i] |
| 2789 | = (recog_data.constraints[i][0] == '=' ? OP_OUT |
| 2790 | : recog_data.constraints[i][0] == '+' ? OP_INOUT |
| 2791 | : OP_IN); |
| 2792 | |
| 2793 | gcc_assert (recog_data.n_alternatives <= MAX_RECOG_ALTERNATIVES)((void)(!(recog_data.n_alternatives <= 35) ? fancy_abort ( "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2793, __FUNCTION__), 0 : 0)); |
| 2794 | |
| 2795 | recog_data.insn = NULLnullptr; |
| 2796 | which_alternative = -1; |
| 2797 | } |
| 2798 | |
| 2799 | /* Fill in OP_ALT_BASE for an instruction that has N_OPERANDS |
| 2800 | operands, N_ALTERNATIVES alternatives and constraint strings |
| 2801 | CONSTRAINTS. OP_ALT_BASE has N_ALTERNATIVES * N_OPERANDS entries |
| 2802 | and CONSTRAINTS has N_OPERANDS entries. OPLOC should be passed in |
| 2803 | if the insn is an asm statement and preprocessing should take the |
| 2804 | asm operands into account, e.g. to determine whether they could be |
| 2805 | addresses in constraints that require addresses; it should then |
| 2806 | point to an array of pointers to each operand. */ |
| 2807 | |
| 2808 | void |
| 2809 | preprocess_constraints (int n_operands, int n_alternatives, |
| 2810 | const char **constraints, |
| 2811 | operand_alternative *op_alt_base, |
| 2812 | rtx **oploc) |
| 2813 | { |
| 2814 | for (int i = 0; i < n_operands; i++) |
| 2815 | { |
| 2816 | int j; |
| 2817 | struct operand_alternative *op_alt; |
| 2818 | const char *p = constraints[i]; |
| 2819 | |
| 2820 | op_alt = op_alt_base; |
| 2821 | |
| 2822 | for (j = 0; j < n_alternatives; j++, op_alt += n_operands) |
| 2823 | { |
| 2824 | op_alt[i].cl = NO_REGS; |
| 2825 | op_alt[i].constraint = p; |
| 2826 | op_alt[i].matches = -1; |
| 2827 | op_alt[i].matched = -1; |
| 2828 | |
| 2829 | if (*p == '\0' || *p == ',') |
| 2830 | { |
| 2831 | op_alt[i].anything_ok = 1; |
| 2832 | continue; |
| 2833 | } |
| 2834 | |
| 2835 | for (;;) |
| 2836 | { |
| 2837 | char c = *p; |
| 2838 | if (c == '#') |
| 2839 | do |
| 2840 | c = *++p; |
| 2841 | while (c != ',' && c != '\0'); |
| 2842 | if (c == ',' || c == '\0') |
| 2843 | { |
| 2844 | p++; |
| 2845 | break; |
| 2846 | } |
| 2847 | |
| 2848 | switch (c) |
| 2849 | { |
| 2850 | case '?': |
| 2851 | op_alt[i].reject += 6; |
| 2852 | break; |
| 2853 | case '!': |
| 2854 | op_alt[i].reject += 600; |
| 2855 | break; |
| 2856 | case '&': |
| 2857 | op_alt[i].earlyclobber = 1; |
| 2858 | break; |
| 2859 | |
| 2860 | case '0': case '1': case '2': case '3': case '4': |
| 2861 | case '5': case '6': case '7': case '8': case '9': |
| 2862 | { |
| 2863 | char *end; |
| 2864 | op_alt[i].matches = strtoul (p, &end, 10); |
| 2865 | op_alt[op_alt[i].matches].matched = i; |
| 2866 | p = end; |
| 2867 | } |
| 2868 | continue; |
| 2869 | |
| 2870 | case 'X': |
| 2871 | op_alt[i].anything_ok = 1; |
| 2872 | break; |
| 2873 | |
| 2874 | case 'g': |
| 2875 | op_alt[i].cl = |
| 2876 | reg_class_subunion(this_target_hard_regs->x_reg_class_subunion)[(int) op_alt[i].cl][(int) GENERAL_REGS]; |
| 2877 | break; |
| 2878 | |
| 2879 | default: |
| 2880 | enum constraint_num cn = lookup_constraint (p); |
| 2881 | enum reg_class cl; |
| 2882 | switch (get_constraint_type (cn)) |
| 2883 | { |
| 2884 | case CT_REGISTER: |
| 2885 | cl = reg_class_for_constraint (cn); |
| 2886 | if (cl != NO_REGS) |
| 2887 | op_alt[i].cl = reg_class_subunion(this_target_hard_regs->x_reg_class_subunion)[op_alt[i].cl][cl]; |
| 2888 | break; |
| 2889 | |
| 2890 | case CT_CONST_INT: |
| 2891 | break; |
| 2892 | |
| 2893 | case CT_MEMORY: |
| 2894 | case CT_SPECIAL_MEMORY: |
| 2895 | op_alt[i].memory_ok = 1; |
| 2896 | break; |
| 2897 | |
| 2898 | case CT_ADDRESS: |
| 2899 | if (oploc && !address_operand (*oploc[i], VOIDmode((void) 0, E_VOIDmode))) |
| 2900 | break; |
| 2901 | |
| 2902 | op_alt[i].is_address = 1; |
| 2903 | op_alt[i].cl |
| 2904 | = (reg_class_subunion(this_target_hard_regs->x_reg_class_subunion) |
| 2905 | [(int) op_alt[i].cl] |
| 2906 | [(int) base_reg_class (VOIDmode((void) 0, E_VOIDmode), ADDR_SPACE_GENERIC0, |
| 2907 | ADDRESS, SCRATCH)]); |
| 2908 | break; |
| 2909 | |
| 2910 | case CT_FIXED_FORM: |
| 2911 | break; |
| 2912 | } |
| 2913 | break; |
| 2914 | } |
| 2915 | p += CONSTRAINT_LEN (c, p)insn_constraint_len (c,p); |
| 2916 | } |
| 2917 | } |
| 2918 | } |
| 2919 | } |
| 2920 | |
| 2921 | /* Return an array of operand_alternative instructions for |
| 2922 | instruction ICODE. */ |
| 2923 | |
| 2924 | const operand_alternative * |
| 2925 | preprocess_insn_constraints (unsigned int icode) |
| 2926 | { |
| 2927 | gcc_checking_assert (IN_RANGE (icode, 0, NUM_INSN_CODES - 1))((void)(!(((unsigned long) (icode) - (unsigned long) (0) <= (unsigned long) (NUM_INSN_CODES - 1) - (unsigned long) (0))) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 2927, __FUNCTION__), 0 : 0)); |
| 2928 | if (this_target_recog->x_op_alt[icode]) |
| 2929 | return this_target_recog->x_op_alt[icode]; |
| 2930 | |
| 2931 | int n_operands = insn_data[icode].n_operands; |
| 2932 | if (n_operands == 0) |
| 2933 | return 0; |
| 2934 | /* Always provide at least one alternative so that which_op_alt () |
| 2935 | works correctly. If the instruction has 0 alternatives (i.e. all |
| 2936 | constraint strings are empty) then each operand in this alternative |
| 2937 | will have anything_ok set. */ |
| 2938 | int n_alternatives = MAX (insn_data[icode].n_alternatives, 1)((insn_data[icode].n_alternatives) > (1) ? (insn_data[icode ].n_alternatives) : (1)); |
| 2939 | int n_entries = n_operands * n_alternatives; |
| 2940 | |
| 2941 | operand_alternative *op_alt = XCNEWVEC (operand_alternative, n_entries)((operand_alternative *) xcalloc ((n_entries), sizeof (operand_alternative ))); |
| 2942 | const char **constraints = XALLOCAVEC (const char *, n_operands)((const char * *) __builtin_alloca(sizeof (const char *) * (n_operands ))); |
| 2943 | |
| 2944 | for (int i = 0; i < n_operands; ++i) |
| 2945 | constraints[i] = insn_data[icode].operand[i].constraint; |
| 2946 | preprocess_constraints (n_operands, n_alternatives, constraints, op_alt, |
| 2947 | NULLnullptr); |
| 2948 | |
| 2949 | this_target_recog->x_op_alt[icode] = op_alt; |
| 2950 | return op_alt; |
| 2951 | } |
| 2952 | |
| 2953 | /* After calling extract_insn, you can use this function to extract some |
| 2954 | information from the constraint strings into a more usable form. |
| 2955 | The collected data is stored in recog_op_alt. */ |
| 2956 | |
| 2957 | void |
| 2958 | preprocess_constraints (rtx_insn *insn) |
| 2959 | { |
| 2960 | int icode = INSN_CODE (insn)(((insn)->u.fld[5]).rt_int); |
| 2961 | if (icode >= 0) |
| 2962 | recog_op_alt = preprocess_insn_constraints (icode); |
| 2963 | else |
| 2964 | { |
| 2965 | int n_operands = recog_data.n_operands; |
| 2966 | int n_alternatives = recog_data.n_alternatives; |
| 2967 | int n_entries = n_operands * n_alternatives; |
| 2968 | memset (asm_op_alt, 0, n_entries * sizeof (operand_alternative)); |
| 2969 | preprocess_constraints (n_operands, n_alternatives, |
| 2970 | recog_data.constraints, asm_op_alt, |
| 2971 | NULLnullptr); |
| 2972 | recog_op_alt = asm_op_alt; |
| 2973 | } |
| 2974 | } |
| 2975 | |
| 2976 | /* Check the operands of an insn against the insn's operand constraints |
| 2977 | and return 1 if they match any of the alternatives in ALTERNATIVES. |
| 2978 | |
| 2979 | The information about the insn's operands, constraints, operand modes |
| 2980 | etc. is obtained from the global variables set up by extract_insn. |
| 2981 | |
| 2982 | WHICH_ALTERNATIVE is set to a number which indicates which |
| 2983 | alternative of constraints was matched: 0 for the first alternative, |
| 2984 | 1 for the next, etc. |
| 2985 | |
| 2986 | In addition, when two operands are required to match |
| 2987 | and it happens that the output operand is (reg) while the |
| 2988 | input operand is --(reg) or ++(reg) (a pre-inc or pre-dec), |
| 2989 | make the output operand look like the input. |
| 2990 | This is because the output operand is the one the template will print. |
| 2991 | |
| 2992 | This is used in final, just before printing the assembler code and by |
| 2993 | the routines that determine an insn's attribute. |
| 2994 | |
| 2995 | If STRICT is a positive nonzero value, it means that we have been |
| 2996 | called after reload has been completed. In that case, we must |
| 2997 | do all checks strictly. If it is zero, it means that we have been called |
| 2998 | before reload has completed. In that case, we first try to see if we can |
| 2999 | find an alternative that matches strictly. If not, we try again, this |
| 3000 | time assuming that reload will fix up the insn. This provides a "best |
| 3001 | guess" for the alternative and is used to compute attributes of insns prior |
| 3002 | to reload. A negative value of STRICT is used for this internal call. */ |
| 3003 | |
| 3004 | struct funny_match |
| 3005 | { |
| 3006 | int this_op, other; |
| 3007 | }; |
| 3008 | |
| 3009 | int |
| 3010 | constrain_operands (int strict, alternative_mask alternatives) |
| 3011 | { |
| 3012 | const char *constraints[MAX_RECOG_OPERANDS30]; |
| 3013 | int matching_operands[MAX_RECOG_OPERANDS30]; |
| 3014 | int earlyclobber[MAX_RECOG_OPERANDS30]; |
| 3015 | int c; |
| 3016 | |
| 3017 | struct funny_match funny_match[MAX_RECOG_OPERANDS30]; |
| 3018 | int funny_match_index; |
| 3019 | |
| 3020 | which_alternative = 0; |
| 3021 | if (recog_data.n_operands == 0 || recog_data.n_alternatives == 0) |
| 3022 | return 1; |
| 3023 | |
| 3024 | for (c = 0; c < recog_data.n_operands; c++) |
| 3025 | constraints[c] = recog_data.constraints[c]; |
| 3026 | |
| 3027 | do |
| 3028 | { |
| 3029 | int seen_earlyclobber_at = -1; |
| 3030 | int opno; |
| 3031 | int lose = 0; |
| 3032 | funny_match_index = 0; |
| 3033 | |
| 3034 | if (!TEST_BIT (alternatives, which_alternative)(((alternatives) >> (which_alternative)) & 1)) |
| 3035 | { |
| 3036 | int i; |
| 3037 | |
| 3038 | for (i = 0; i < recog_data.n_operands; i++) |
| 3039 | constraints[i] = skip_alternative (constraints[i]); |
| 3040 | |
| 3041 | which_alternative++; |
| 3042 | continue; |
| 3043 | } |
| 3044 | |
| 3045 | for (opno = 0; opno < recog_data.n_operands; opno++) |
| 3046 | matching_operands[opno] = -1; |
| 3047 | |
| 3048 | for (opno = 0; opno < recog_data.n_operands; opno++) |
| 3049 | { |
| 3050 | rtx op = recog_data.operand[opno]; |
| 3051 | machine_mode mode = GET_MODE (op)((machine_mode) (op)->mode); |
| 3052 | const char *p = constraints[opno]; |
| 3053 | int offset = 0; |
| 3054 | int win = 0; |
| 3055 | int val; |
| 3056 | int len; |
| 3057 | |
| 3058 | earlyclobber[opno] = 0; |
| 3059 | |
| 3060 | /* A unary operator may be accepted by the predicate, but it |
| 3061 | is irrelevant for matching constraints. */ |
| 3062 | /* For special_memory_operand, there could be a memory operand inside, |
| 3063 | and it would cause a mismatch for constraint_satisfied_p. */ |
| 3064 | if (UNARY_P (op)((rtx_class[(int) (((enum rtx_code) (op)->code))]) == RTX_UNARY ) && op == extract_mem_from_operand (op)) |
| 3065 | op = XEXP (op, 0)(((op)->u.fld[0]).rt_rtx); |
| 3066 | |
| 3067 | if (GET_CODE (op)((enum rtx_code) (op)->code) == SUBREG) |
| 3068 | { |
| 3069 | if (REG_P (SUBREG_REG (op))(((enum rtx_code) ((((op)->u.fld[0]).rt_rtx))->code) == REG) |
| 3070 | && REGNO (SUBREG_REG (op))(rhs_regno((((op)->u.fld[0]).rt_rtx))) < FIRST_PSEUDO_REGISTER76) |
| 3071 | offset = subreg_regno_offset (REGNO (SUBREG_REG (op))(rhs_regno((((op)->u.fld[0]).rt_rtx))), |
| 3072 | GET_MODE (SUBREG_REG (op))((machine_mode) ((((op)->u.fld[0]).rt_rtx))->mode), |
| 3073 | SUBREG_BYTE (op)(((op)->u.fld[1]).rt_subreg), |
| 3074 | GET_MODE (op)((machine_mode) (op)->mode)); |
| 3075 | op = SUBREG_REG (op)(((op)->u.fld[0]).rt_rtx); |
| 3076 | } |
| 3077 | |
| 3078 | /* An empty constraint or empty alternative |
| 3079 | allows anything which matched the pattern. */ |
| 3080 | if (*p == 0 || *p == ',') |
| 3081 | win = 1; |
| 3082 | |
| 3083 | do |
| 3084 | switch (c = *p, len = CONSTRAINT_LEN (c, p)insn_constraint_len (c,p), c) |
| 3085 | { |
| 3086 | case '\0': |
| 3087 | len = 0; |
| 3088 | break; |
| 3089 | case ',': |
| 3090 | c = '\0'; |
| 3091 | break; |
| 3092 | |
| 3093 | case '#': |
| 3094 | /* Ignore rest of this alternative as far as |
| 3095 | constraint checking is concerned. */ |
| 3096 | do |
| 3097 | p++; |
| 3098 | while (*p && *p != ','); |
| 3099 | len = 0; |
| 3100 | break; |
| 3101 | |
| 3102 | case '&': |
| 3103 | earlyclobber[opno] = 1; |
| 3104 | if (seen_earlyclobber_at < 0) |
| 3105 | seen_earlyclobber_at = opno; |
| 3106 | break; |
| 3107 | |
| 3108 | case '0': case '1': case '2': case '3': case '4': |
| 3109 | case '5': case '6': case '7': case '8': case '9': |
| 3110 | { |
| 3111 | /* This operand must be the same as a previous one. |
| 3112 | This kind of constraint is used for instructions such |
| 3113 | as add when they take only two operands. |
| 3114 | |
| 3115 | Note that the lower-numbered operand is passed first. |
| 3116 | |
| 3117 | If we are not testing strictly, assume that this |
| 3118 | constraint will be satisfied. */ |
| 3119 | |
| 3120 | char *end; |
| 3121 | int match; |
| 3122 | |
| 3123 | match = strtoul (p, &end, 10); |
| 3124 | p = end; |
| 3125 | |
| 3126 | if (strict < 0) |
| 3127 | val = 1; |
| 3128 | else |
| 3129 | { |
| 3130 | rtx op1 = recog_data.operand[match]; |
| 3131 | rtx op2 = recog_data.operand[opno]; |
| 3132 | |
| 3133 | /* A unary operator may be accepted by the predicate, |
| 3134 | but it is irrelevant for matching constraints. */ |
| 3135 | if (UNARY_P (op1)((rtx_class[(int) (((enum rtx_code) (op1)->code))]) == RTX_UNARY )) |
| 3136 | op1 = XEXP (op1, 0)(((op1)->u.fld[0]).rt_rtx); |
| 3137 | if (UNARY_P (op2)((rtx_class[(int) (((enum rtx_code) (op2)->code))]) == RTX_UNARY )) |
| 3138 | op2 = XEXP (op2, 0)(((op2)->u.fld[0]).rt_rtx); |
| 3139 | |
| 3140 | val = operands_match_p (op1, op2); |
| 3141 | } |
| 3142 | |
| 3143 | matching_operands[opno] = match; |
| 3144 | matching_operands[match] = opno; |
| 3145 | |
| 3146 | if (val != 0) |
| 3147 | win = 1; |
| 3148 | |
| 3149 | /* If output is *x and input is *--x, arrange later |
| 3150 | to change the output to *--x as well, since the |
| 3151 | output op is the one that will be printed. */ |
| 3152 | if (val == 2 && strict > 0) |
| 3153 | { |
| 3154 | funny_match[funny_match_index].this_op = opno; |
| 3155 | funny_match[funny_match_index++].other = match; |
| 3156 | } |
| 3157 | } |
| 3158 | len = 0; |
| 3159 | break; |
| 3160 | |
| 3161 | case 'p': |
| 3162 | /* p is used for address_operands. When we are called by |
| 3163 | gen_reload, no one will have checked that the address is |
| 3164 | strictly valid, i.e., that all pseudos requiring hard regs |
| 3165 | have gotten them. We also want to make sure we have a |
| 3166 | valid mode. */ |
| 3167 | if ((GET_MODE (op)((machine_mode) (op)->mode) == VOIDmode((void) 0, E_VOIDmode) |
| 3168 | || SCALAR_INT_MODE_P (GET_MODE (op))(((enum mode_class) mode_class[((machine_mode) (op)->mode) ]) == MODE_INT || ((enum mode_class) mode_class[((machine_mode ) (op)->mode)]) == MODE_PARTIAL_INT)) |
| 3169 | && (strict <= 0 |
| 3170 | || (strict_memory_address_pstrict_memory_address_addr_space_p ((recog_data.operand_mode[ opno]), (op), 0) |
| 3171 | (recog_data.operand_mode[opno], op)strict_memory_address_addr_space_p ((recog_data.operand_mode[ opno]), (op), 0)))) |
| 3172 | win = 1; |
| 3173 | break; |
| 3174 | |
| 3175 | /* No need to check general_operand again; |
| 3176 | it was done in insn-recog.c. Well, except that reload |
| 3177 | doesn't check the validity of its replacements, but |
| 3178 | that should only matter when there's a bug. */ |
| 3179 | case 'g': |
| 3180 | /* Anything goes unless it is a REG and really has a hard reg |
| 3181 | but the hard reg is not in the class GENERAL_REGS. */ |
| 3182 | if (REG_P (op)(((enum rtx_code) (op)->code) == REG)) |
| 3183 | { |
| 3184 | if (strict < 0 |
| 3185 | || GENERAL_REGS == ALL_REGS |
| 3186 | || (reload_in_progress |
| 3187 | && REGNO (op)(rhs_regno(op)) >= FIRST_PSEUDO_REGISTER76) |
| 3188 | || reg_fits_class_p (op, GENERAL_REGS, offset, mode)) |
| 3189 | win = 1; |
| 3190 | } |
| 3191 | else if (strict < 0 || general_operand (op, mode)) |
| 3192 | win = 1; |
| 3193 | break; |
| 3194 | |
| 3195 | default: |
| 3196 | { |
| 3197 | enum constraint_num cn = lookup_constraint (p); |
| 3198 | enum reg_class cl = reg_class_for_constraint (cn); |
| 3199 | if (cl != NO_REGS) |
| 3200 | { |
| 3201 | if (strict < 0 |
| 3202 | || (strict == 0 |
| 3203 | && REG_P (op)(((enum rtx_code) (op)->code) == REG) |
| 3204 | && REGNO (op)(rhs_regno(op)) >= FIRST_PSEUDO_REGISTER76) |
| 3205 | || (strict == 0 && GET_CODE (op)((enum rtx_code) (op)->code) == SCRATCH) |
| 3206 | || (REG_P (op)(((enum rtx_code) (op)->code) == REG) |
| 3207 | && reg_fits_class_p (op, cl, offset, mode))) |
| 3208 | win = 1; |
| 3209 | } |
| 3210 | |
| 3211 | else if (constraint_satisfied_p (op, cn)) |
| 3212 | win = 1; |
| 3213 | |
| 3214 | else if (insn_extra_memory_constraint (cn) |
| 3215 | /* Every memory operand can be reloaded to fit. */ |
| 3216 | && ((strict < 0 && MEM_P (op)(((enum rtx_code) (op)->code) == MEM)) |
| 3217 | /* Before reload, accept what reload can turn |
| 3218 | into a mem. */ |
| 3219 | || (strict < 0 && CONSTANT_P (op)((rtx_class[(int) (((enum rtx_code) (op)->code))]) == RTX_CONST_OBJ )) |
| 3220 | /* Before reload, accept a pseudo or hard register, |
| 3221 | since LRA can turn it into a mem. */ |
| 3222 | || (strict < 0 && targetm.lra_p () && REG_P (op)(((enum rtx_code) (op)->code) == REG)) |
| 3223 | /* During reload, accept a pseudo */ |
| 3224 | || (reload_in_progress && REG_P (op)(((enum rtx_code) (op)->code) == REG) |
| 3225 | && REGNO (op)(rhs_regno(op)) >= FIRST_PSEUDO_REGISTER76))) |
| 3226 | win = 1; |
| 3227 | else if (insn_extra_address_constraint (cn) |
| 3228 | /* Every address operand can be reloaded to fit. */ |
| 3229 | && strict < 0) |
| 3230 | win = 1; |
| 3231 | /* Cater to architectures like IA-64 that define extra memory |
| 3232 | constraints without using define_memory_constraint. */ |
| 3233 | else if (reload_in_progress |
| 3234 | && REG_P (op)(((enum rtx_code) (op)->code) == REG) |
| 3235 | && REGNO (op)(rhs_regno(op)) >= FIRST_PSEUDO_REGISTER76 |
| 3236 | && reg_renumber[REGNO (op)(rhs_regno(op))] < 0 |
| 3237 | && reg_equiv_mem (REGNO (op))(*reg_equivs)[((rhs_regno(op)))].mem != 0 |
| 3238 | && constraint_satisfied_p |
| 3239 | (reg_equiv_mem (REGNO (op))(*reg_equivs)[((rhs_regno(op)))].mem, cn)) |
| 3240 | win = 1; |
| 3241 | break; |
| 3242 | } |
| 3243 | } |
| 3244 | while (p += len, c); |
| 3245 | |
| 3246 | constraints[opno] = p; |
| 3247 | /* If this operand did not win somehow, |
| 3248 | this alternative loses. */ |
| 3249 | if (! win) |
| 3250 | lose = 1; |
| 3251 | } |
| 3252 | /* This alternative won; the operands are ok. |
| 3253 | Change whichever operands this alternative says to change. */ |
| 3254 | if (! lose) |
| 3255 | { |
| 3256 | int opno, eopno; |
| 3257 | |
| 3258 | /* See if any earlyclobber operand conflicts with some other |
| 3259 | operand. */ |
| 3260 | |
| 3261 | if (strict > 0 && seen_earlyclobber_at >= 0) |
| 3262 | for (eopno = seen_earlyclobber_at; |
| 3263 | eopno < recog_data.n_operands; |
| 3264 | eopno++) |
| 3265 | /* Ignore earlyclobber operands now in memory, |
| 3266 | because we would often report failure when we have |
| 3267 | two memory operands, one of which was formerly a REG. */ |
| 3268 | if (earlyclobber[eopno] |
| 3269 | && REG_P (recog_data.operand[eopno])(((enum rtx_code) (recog_data.operand[eopno])->code) == REG )) |
| 3270 | for (opno = 0; opno < recog_data.n_operands; opno++) |
| 3271 | if ((MEM_P (recog_data.operand[opno])(((enum rtx_code) (recog_data.operand[opno])->code) == MEM ) |
| 3272 | || recog_data.operand_type[opno] != OP_OUT) |
| 3273 | && opno != eopno |
| 3274 | /* Ignore things like match_operator operands. */ |
| 3275 | && *recog_data.constraints[opno] != 0 |
| 3276 | && ! (matching_operands[opno] == eopno |
| 3277 | && operands_match_p (recog_data.operand[opno], |
| 3278 | recog_data.operand[eopno])) |
| 3279 | && ! safe_from_earlyclobber (recog_data.operand[opno], |
| 3280 | recog_data.operand[eopno])) |
| 3281 | lose = 1; |
| 3282 | |
| 3283 | if (! lose) |
| 3284 | { |
| 3285 | while (--funny_match_index >= 0) |
| 3286 | { |
| 3287 | recog_data.operand[funny_match[funny_match_index].other] |
| 3288 | = recog_data.operand[funny_match[funny_match_index].this_op]; |
| 3289 | } |
| 3290 | |
| 3291 | /* For operands without < or > constraints reject side-effects. */ |
| 3292 | if (AUTO_INC_DEC0 && recog_data.is_asm) |
| 3293 | { |
| 3294 | for (opno = 0; opno < recog_data.n_operands; opno++) |
| 3295 | if (MEM_P (recog_data.operand[opno])(((enum rtx_code) (recog_data.operand[opno])->code) == MEM )) |
| 3296 | switch (GET_CODE (XEXP (recog_data.operand[opno], 0))((enum rtx_code) ((((recog_data.operand[opno])->u.fld[0]). rt_rtx))->code)) |
| 3297 | { |
| 3298 | case PRE_INC: |
| 3299 | case POST_INC: |
| 3300 | case PRE_DEC: |
| 3301 | case POST_DEC: |
| 3302 | case PRE_MODIFY: |
| 3303 | case POST_MODIFY: |
| 3304 | if (strchr (recog_data.constraints[opno], '<') == NULLnullptr |
| 3305 | && strchr (recog_data.constraints[opno], '>') |
| 3306 | == NULLnullptr) |
| 3307 | return 0; |
| 3308 | break; |
| 3309 | default: |
| 3310 | break; |
| 3311 | } |
| 3312 | } |
| 3313 | |
| 3314 | return 1; |
| 3315 | } |
| 3316 | } |
| 3317 | |
| 3318 | which_alternative++; |
| 3319 | } |
| 3320 | while (which_alternative < recog_data.n_alternatives); |
| 3321 | |
| 3322 | which_alternative = -1; |
| 3323 | /* If we are about to reject this, but we are not to test strictly, |
| 3324 | try a very loose test. Only return failure if it fails also. */ |
| 3325 | if (strict == 0) |
| 3326 | return constrain_operands (-1, alternatives); |
| 3327 | else |
| 3328 | return 0; |
| 3329 | } |
| 3330 | |
| 3331 | /* Return true iff OPERAND (assumed to be a REG rtx) |
| 3332 | is a hard reg in class CLASS when its regno is offset by OFFSET |
| 3333 | and changed to mode MODE. |
| 3334 | If REG occupies multiple hard regs, all of them must be in CLASS. */ |
| 3335 | |
| 3336 | bool |
| 3337 | reg_fits_class_p (const_rtx operand, reg_class_t cl, int offset, |
| 3338 | machine_mode mode) |
| 3339 | { |
| 3340 | unsigned int regno = REGNO (operand)(rhs_regno(operand)); |
| 3341 | |
| 3342 | if (cl == NO_REGS) |
| 3343 | return false; |
| 3344 | |
| 3345 | /* Regno must not be a pseudo register. Offset may be negative. */ |
| 3346 | return (HARD_REGISTER_NUM_P (regno)((regno) < 76) |
| 3347 | && HARD_REGISTER_NUM_P (regno + offset)((regno + offset) < 76) |
| 3348 | && in_hard_reg_set_p (reg_class_contents(this_target_hard_regs->x_reg_class_contents)[(int) cl], mode, |
| 3349 | regno + offset)); |
| 3350 | } |
| 3351 | |
| 3352 | /* Split single instruction. Helper function for split_all_insns and |
| 3353 | split_all_insns_noflow. Return last insn in the sequence if successful, |
| 3354 | or NULL if unsuccessful. */ |
| 3355 | |
| 3356 | static rtx_insn * |
| 3357 | split_insn (rtx_insn *insn) |
| 3358 | { |
| 3359 | /* Split insns here to get max fine-grain parallelism. */ |
| 3360 | rtx_insn *first = PREV_INSN (insn); |
| 3361 | rtx_insn *last = try_split (PATTERN (insn), insn, 1); |
| 3362 | rtx insn_set, last_set, note; |
| 3363 | |
| 3364 | if (last == insn) |
| 3365 | return NULLnullptr; |
| 3366 | |
| 3367 | /* If the original instruction was a single set that was known to be |
| 3368 | equivalent to a constant, see if we can say the same about the last |
| 3369 | instruction in the split sequence. The two instructions must set |
| 3370 | the same destination. */ |
| 3371 | insn_set = single_set (insn); |
| 3372 | if (insn_set) |
| 3373 | { |
| 3374 | last_set = single_set (last); |
| 3375 | if (last_set && rtx_equal_p (SET_DEST (last_set)(((last_set)->u.fld[0]).rt_rtx), SET_DEST (insn_set)(((insn_set)->u.fld[0]).rt_rtx))) |
| 3376 | { |
| 3377 | note = find_reg_equal_equiv_note (insn); |
| 3378 | if (note && CONSTANT_P (XEXP (note, 0))((rtx_class[(int) (((enum rtx_code) ((((note)->u.fld[0]).rt_rtx ))->code))]) == RTX_CONST_OBJ)) |
| 3379 | set_unique_reg_note (last, REG_EQUAL, XEXP (note, 0)(((note)->u.fld[0]).rt_rtx)); |
| 3380 | else if (CONSTANT_P (SET_SRC (insn_set))((rtx_class[(int) (((enum rtx_code) ((((insn_set)->u.fld[1 ]).rt_rtx))->code))]) == RTX_CONST_OBJ)) |
| 3381 | set_unique_reg_note (last, REG_EQUAL, |
| 3382 | copy_rtx (SET_SRC (insn_set)(((insn_set)->u.fld[1]).rt_rtx))); |
| 3383 | } |
| 3384 | } |
| 3385 | |
| 3386 | /* try_split returns the NOTE that INSN became. */ |
| 3387 | SET_INSN_DELETED (insn)set_insn_deleted (insn);; |
| 3388 | |
| 3389 | /* ??? Coddle to md files that generate subregs in post-reload |
| 3390 | splitters instead of computing the proper hard register. */ |
| 3391 | if (reload_completed && first != last) |
| 3392 | { |
| 3393 | first = NEXT_INSN (first); |
| 3394 | for (;;) |
| 3395 | { |
| 3396 | if (INSN_P (first)(((((enum rtx_code) (first)->code) == INSN) || (((enum rtx_code ) (first)->code) == JUMP_INSN) || (((enum rtx_code) (first )->code) == CALL_INSN)) || (((enum rtx_code) (first)->code ) == DEBUG_INSN))) |
| 3397 | cleanup_subreg_operands (first); |
| 3398 | if (first == last) |
| 3399 | break; |
| 3400 | first = NEXT_INSN (first); |
| 3401 | } |
| 3402 | } |
| 3403 | |
| 3404 | return last; |
| 3405 | } |
| 3406 | |
| 3407 | /* Split all insns in the function. If UPD_LIFE, update life info after. */ |
| 3408 | |
| 3409 | void |
| 3410 | split_all_insns (void) |
| 3411 | { |
| 3412 | bool changed; |
| 3413 | bool need_cfg_cleanup = false; |
| 3414 | basic_block bb; |
| 3415 | |
| 3416 | auto_sbitmap blocks (last_basic_block_for_fn (cfun)(((cfun + 0))->cfg->x_last_basic_block)); |
| 3417 | bitmap_clear (blocks); |
| 3418 | changed = false; |
| 3419 | |
| 3420 | FOR_EACH_BB_REVERSE_FN (bb, cfun)for (bb = ((cfun + 0))->cfg->x_exit_block_ptr->prev_bb ; bb != ((cfun + 0))->cfg->x_entry_block_ptr; bb = bb-> prev_bb) |
| 3421 | { |
| 3422 | rtx_insn *insn, *next; |
| 3423 | bool finish = false; |
| 3424 | |
| 3425 | rtl_profile_for_bb (bb); |
| 3426 | for (insn = BB_HEAD (bb)(bb)->il.x.head_; !finish ; insn = next) |
| 3427 | { |
| 3428 | /* Can't use `next_real_insn' because that might go across |
| 3429 | CODE_LABELS and short-out basic blocks. */ |
| 3430 | next = NEXT_INSN (insn); |
| 3431 | finish = (insn == BB_END (bb)(bb)->il.x.rtl->end_); |
| 3432 | |
| 3433 | /* If INSN has a REG_EH_REGION note and we split INSN, the |
| 3434 | resulting split may not have/need REG_EH_REGION notes. |
| 3435 | |
| 3436 | If that happens and INSN was the last reference to the |
| 3437 | given EH region, then the EH region will become unreachable. |
| 3438 | We cannot leave the unreachable blocks in the CFG as that |
| 3439 | will trigger a checking failure. |
| 3440 | |
| 3441 | So track if INSN has a REG_EH_REGION note. If so and we |
| 3442 | split INSN, then trigger a CFG cleanup. */ |
| 3443 | rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX(rtx) 0); |
| 3444 | if (INSN_P (insn)(((((enum rtx_code) (insn)->code) == INSN) || (((enum rtx_code ) (insn)->code) == JUMP_INSN) || (((enum rtx_code) (insn)-> code) == CALL_INSN)) || (((enum rtx_code) (insn)->code) == DEBUG_INSN))) |
| 3445 | { |
| 3446 | rtx set = single_set (insn); |
| 3447 | |
| 3448 | /* Don't split no-op move insns. These should silently |
| 3449 | disappear later in final. Splitting such insns would |
| 3450 | break the code that handles LIBCALL blocks. */ |
| 3451 | if (set && set_noop_p (set)) |
| 3452 | { |
| 3453 | /* Nops get in the way while scheduling, so delete them |
| 3454 | now if register allocation has already been done. It |
| 3455 | is too risky to try to do this before register |
| 3456 | allocation, and there are unlikely to be very many |
| 3457 | nops then anyways. */ |
| 3458 | if (reload_completed) |
| 3459 | delete_insn_and_edges (insn); |
| 3460 | if (note) |
| 3461 | need_cfg_cleanup = true; |
| 3462 | } |
| 3463 | else |
| 3464 | { |
| 3465 | if (split_insn (insn)) |
| 3466 | { |
| 3467 | bitmap_set_bit (blocks, bb->index); |
| 3468 | changed = true; |
| 3469 | if (note) |
| 3470 | need_cfg_cleanup = true; |
| 3471 | } |
| 3472 | } |
| 3473 | } |
| 3474 | } |
| 3475 | } |
| 3476 | |
| 3477 | default_rtl_profile (); |
| 3478 | if (changed) |
| 3479 | { |
| 3480 | find_many_sub_basic_blocks (blocks); |
| 3481 | |
| 3482 | /* Splitting could drop an REG_EH_REGION if it potentially |
| 3483 | trapped in its original form, but does not in its split |
| 3484 | form. Consider a FLOAT_TRUNCATE which splits into a memory |
| 3485 | store/load pair and -fnon-call-exceptions. */ |
| 3486 | if (need_cfg_cleanup) |
| 3487 | cleanup_cfg (0); |
| 3488 | } |
| 3489 | |
| 3490 | checking_verify_flow_info (); |
| 3491 | } |
| 3492 | |
| 3493 | /* Same as split_all_insns, but do not expect CFG to be available. |
| 3494 | Used by machine dependent reorg passes. */ |
| 3495 | |
| 3496 | unsigned int |
| 3497 | split_all_insns_noflow (void) |
| 3498 | { |
| 3499 | rtx_insn *next, *insn; |
| 3500 | |
| 3501 | for (insn = get_insns (); insn; insn = next) |
| 3502 | { |
| 3503 | next = NEXT_INSN (insn); |
| 3504 | if (INSN_P (insn)(((((enum rtx_code) (insn)->code) == INSN) || (((enum rtx_code ) (insn)->code) == JUMP_INSN) || (((enum rtx_code) (insn)-> code) == CALL_INSN)) || (((enum rtx_code) (insn)->code) == DEBUG_INSN))) |
| 3505 | { |
| 3506 | /* Don't split no-op move insns. These should silently |
| 3507 | disappear later in final. Splitting such insns would |
| 3508 | break the code that handles LIBCALL blocks. */ |
| 3509 | rtx set = single_set (insn); |
| 3510 | if (set && set_noop_p (set)) |
| 3511 | { |
| 3512 | /* Nops get in the way while scheduling, so delete them |
| 3513 | now if register allocation has already been done. It |
| 3514 | is too risky to try to do this before register |
| 3515 | allocation, and there are unlikely to be very many |
| 3516 | nops then anyways. |
| 3517 | |
| 3518 | ??? Should we use delete_insn when the CFG isn't valid? */ |
| 3519 | if (reload_completed) |
| 3520 | delete_insn_and_edges (insn); |
| 3521 | } |
| 3522 | else |
| 3523 | split_insn (insn); |
| 3524 | } |
| 3525 | } |
| 3526 | return 0; |
| 3527 | } |
| 3528 | |
| 3529 | struct peep2_insn_data |
| 3530 | { |
| 3531 | rtx_insn *insn; |
| 3532 | regset live_before; |
| 3533 | }; |
| 3534 | |
| 3535 | static struct peep2_insn_data peep2_insn_data[MAX_INSNS_PER_PEEP25 + 1]; |
| 3536 | static int peep2_current; |
| 3537 | |
| 3538 | static bool peep2_do_rebuild_jump_labels; |
| 3539 | static bool peep2_do_cleanup_cfg; |
| 3540 | |
| 3541 | /* The number of instructions available to match a peep2. */ |
| 3542 | int peep2_current_count; |
| 3543 | |
| 3544 | /* A marker indicating the last insn of the block. The live_before regset |
| 3545 | for this element is correct, indicating DF_LIVE_OUT for the block. */ |
| 3546 | #define PEEP2_EOBinvalid_insn_rtx invalid_insn_rtx |
| 3547 | |
| 3548 | /* Wrap N to fit into the peep2_insn_data buffer. */ |
| 3549 | |
| 3550 | static int |
| 3551 | peep2_buf_position (int n) |
| 3552 | { |
| 3553 | if (n >= MAX_INSNS_PER_PEEP25 + 1) |
| 3554 | n -= MAX_INSNS_PER_PEEP25 + 1; |
| 3555 | return n; |
| 3556 | } |
| 3557 | |
| 3558 | /* Return the Nth non-note insn after `current', or return NULL_RTX if it |
| 3559 | does not exist. Used by the recognizer to find the next insn to match |
| 3560 | in a multi-insn pattern. */ |
| 3561 | |
| 3562 | rtx_insn * |
| 3563 | peep2_next_insn (int n) |
| 3564 | { |
| 3565 | gcc_assert (n <= peep2_current_count)((void)(!(n <= peep2_current_count) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3565, __FUNCTION__), 0 : 0)); |
| 3566 | |
| 3567 | n = peep2_buf_position (peep2_current + n); |
| 3568 | |
| 3569 | return peep2_insn_data[n].insn; |
| 3570 | } |
| 3571 | |
| 3572 | /* Return true if REGNO is dead before the Nth non-note insn |
| 3573 | after `current'. */ |
| 3574 | |
| 3575 | int |
| 3576 | peep2_regno_dead_p (int ofs, int regno) |
| 3577 | { |
| 3578 | gcc_assert (ofs < MAX_INSNS_PER_PEEP2 + 1)((void)(!(ofs < 5 + 1) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3578, __FUNCTION__), 0 : 0)); |
| 3579 | |
| 3580 | ofs = peep2_buf_position (peep2_current + ofs); |
| 3581 | |
| 3582 | gcc_assert (peep2_insn_data[ofs].insn != NULL_RTX)((void)(!(peep2_insn_data[ofs].insn != (rtx) 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3582, __FUNCTION__), 0 : 0)); |
| 3583 | |
| 3584 | return ! REGNO_REG_SET_P (peep2_insn_data[ofs].live_before, regno)bitmap_bit_p (peep2_insn_data[ofs].live_before, regno); |
| 3585 | } |
| 3586 | |
| 3587 | /* Similarly for a REG. */ |
| 3588 | |
| 3589 | int |
| 3590 | peep2_reg_dead_p (int ofs, rtx reg) |
| 3591 | { |
| 3592 | gcc_assert (ofs < MAX_INSNS_PER_PEEP2 + 1)((void)(!(ofs < 5 + 1) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3592, __FUNCTION__), 0 : 0)); |
| 3593 | |
| 3594 | ofs = peep2_buf_position (peep2_current + ofs); |
| 3595 | |
| 3596 | gcc_assert (peep2_insn_data[ofs].insn != NULL_RTX)((void)(!(peep2_insn_data[ofs].insn != (rtx) 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3596, __FUNCTION__), 0 : 0)); |
| 3597 | |
| 3598 | unsigned int end_regno = END_REGNO (reg); |
| 3599 | for (unsigned int regno = REGNO (reg)(rhs_regno(reg)); regno < end_regno; ++regno) |
| 3600 | if (REGNO_REG_SET_P (peep2_insn_data[ofs].live_before, regno)bitmap_bit_p (peep2_insn_data[ofs].live_before, regno)) |
| 3601 | return 0; |
| 3602 | return 1; |
| 3603 | } |
| 3604 | |
| 3605 | /* Regno offset to be used in the register search. */ |
| 3606 | static int search_ofs; |
| 3607 | |
| 3608 | /* Try to find a hard register of mode MODE, matching the register class in |
| 3609 | CLASS_STR, which is available at the beginning of insn CURRENT_INSN and |
| 3610 | remains available until the end of LAST_INSN. LAST_INSN may be NULL_RTX, |
| 3611 | in which case the only condition is that the register must be available |
| 3612 | before CURRENT_INSN. |
| 3613 | Registers that already have bits set in REG_SET will not be considered. |
| 3614 | |
| 3615 | If an appropriate register is available, it will be returned and the |
| 3616 | corresponding bit(s) in REG_SET will be set; otherwise, NULL_RTX is |
| 3617 | returned. */ |
| 3618 | |
| 3619 | rtx |
| 3620 | peep2_find_free_register (int from, int to, const char *class_str, |
| 3621 | machine_mode mode, HARD_REG_SET *reg_set) |
| 3622 | { |
| 3623 | enum reg_class cl; |
| 3624 | HARD_REG_SET live; |
| 3625 | df_ref def; |
| 3626 | int i; |
| 3627 | |
| 3628 | gcc_assert (from < MAX_INSNS_PER_PEEP2 + 1)((void)(!(from < 5 + 1) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3628, __FUNCTION__), 0 : 0)); |
| 3629 | gcc_assert (to < MAX_INSNS_PER_PEEP2 + 1)((void)(!(to < 5 + 1) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3629, __FUNCTION__), 0 : 0)); |
| 3630 | |
| 3631 | from = peep2_buf_position (peep2_current + from); |
| 3632 | to = peep2_buf_position (peep2_current + to); |
| 3633 | |
| 3634 | gcc_assert (peep2_insn_data[from].insn != NULL_RTX)((void)(!(peep2_insn_data[from].insn != (rtx) 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3634, __FUNCTION__), 0 : 0)); |
| 3635 | REG_SET_TO_HARD_REG_SET (live, peep2_insn_data[from].live_before)do { CLEAR_HARD_REG_SET (live); reg_set_to_hard_reg_set (& live, peep2_insn_data[from].live_before); } while (0); |
| 3636 | |
| 3637 | while (from != to) |
| 3638 | { |
| 3639 | gcc_assert (peep2_insn_data[from].insn != NULL_RTX)((void)(!(peep2_insn_data[from].insn != (rtx) 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3639, __FUNCTION__), 0 : 0)); |
| 3640 | |
| 3641 | /* Don't use registers set or clobbered by the insn. */ |
| 3642 | FOR_EACH_INSN_DEF (def, peep2_insn_data[from].insn)for (def = (((df->insns[(INSN_UID (peep2_insn_data[from].insn ))]))->defs); def; def = ((def)->base.next_loc)) |
| 3643 | SET_HARD_REG_BIT (live, DF_REF_REGNO (def)((def)->base.regno)); |
| 3644 | |
| 3645 | from = peep2_buf_position (from + 1); |
| 3646 | } |
| 3647 | |
| 3648 | cl = reg_class_for_constraint (lookup_constraint (class_str)); |
| 3649 | |
| 3650 | for (i = 0; i < FIRST_PSEUDO_REGISTER76; i++) |
| 3651 | { |
| 3652 | int raw_regno, regno, success, j; |
| 3653 | |
| 3654 | /* Distribute the free registers as much as possible. */ |
| 3655 | raw_regno = search_ofs + i; |
| 3656 | if (raw_regno >= FIRST_PSEUDO_REGISTER76) |
| 3657 | raw_regno -= FIRST_PSEUDO_REGISTER76; |
| 3658 | #ifdef REG_ALLOC_ORDER |
| 3659 | regno = reg_alloc_order(this_target_hard_regs->x_reg_alloc_order)[raw_regno]; |
| 3660 | #else |
| 3661 | regno = raw_regno; |
| 3662 | #endif |
| 3663 | |
| 3664 | /* Can it support the mode we need? */ |
| 3665 | if (!targetm.hard_regno_mode_ok (regno, mode)) |
| 3666 | continue; |
| 3667 | |
| 3668 | success = 1; |
| 3669 | for (j = 0; success && j < hard_regno_nregs (regno, mode); j++) |
| 3670 | { |
| 3671 | /* Don't allocate fixed registers. */ |
| 3672 | if (fixed_regs(this_target_hard_regs->x_fixed_regs)[regno + j]) |
| 3673 | { |
| 3674 | success = 0; |
| 3675 | break; |
| 3676 | } |
| 3677 | /* Don't allocate global registers. */ |
| 3678 | if (global_regs[regno + j]) |
| 3679 | { |
| 3680 | success = 0; |
| 3681 | break; |
| 3682 | } |
| 3683 | /* Make sure the register is of the right class. */ |
| 3684 | if (! TEST_HARD_REG_BIT (reg_class_contents(this_target_hard_regs->x_reg_class_contents)[cl], regno + j)) |
| 3685 | { |
| 3686 | success = 0; |
| 3687 | break; |
| 3688 | } |
| 3689 | /* And that we don't create an extra save/restore. */ |
| 3690 | if (! crtl(&x_rtl)->abi->clobbers_full_reg_p (regno + j) |
| 3691 | && ! df_regs_ever_live_p (regno + j)) |
| 3692 | { |
| 3693 | success = 0; |
| 3694 | break; |
| 3695 | } |
| 3696 | |
| 3697 | if (! targetm.hard_regno_scratch_ok (regno + j)) |
| 3698 | { |
| 3699 | success = 0; |
| 3700 | break; |
| 3701 | } |
| 3702 | |
| 3703 | /* And we don't clobber traceback for noreturn functions. */ |
| 3704 | if ((regno + j == FRAME_POINTER_REGNUM19 |
| 3705 | || regno + j == HARD_FRAME_POINTER_REGNUM6) |
| 3706 | && (! reload_completed || frame_pointer_needed((&x_rtl)->frame_pointer_needed))) |
| 3707 | { |
| 3708 | success = 0; |
| 3709 | break; |
| 3710 | } |
| 3711 | |
| 3712 | if (TEST_HARD_REG_BIT (*reg_set, regno + j) |
| 3713 | || TEST_HARD_REG_BIT (live, regno + j)) |
| 3714 | { |
| 3715 | success = 0; |
| 3716 | break; |
| 3717 | } |
| 3718 | } |
| 3719 | |
| 3720 | if (success) |
| 3721 | { |
| 3722 | add_to_hard_reg_set (reg_set, mode, regno); |
| 3723 | |
| 3724 | /* Start the next search with the next register. */ |
| 3725 | if (++raw_regno >= FIRST_PSEUDO_REGISTER76) |
| 3726 | raw_regno = 0; |
| 3727 | search_ofs = raw_regno; |
| 3728 | |
| 3729 | return gen_rtx_REG (mode, regno); |
| 3730 | } |
| 3731 | } |
| 3732 | |
| 3733 | search_ofs = 0; |
| 3734 | return NULL_RTX(rtx) 0; |
| 3735 | } |
| 3736 | |
| 3737 | /* Forget all currently tracked instructions, only remember current |
| 3738 | LIVE regset. */ |
| 3739 | |
| 3740 | static void |
| 3741 | peep2_reinit_state (regset live) |
| 3742 | { |
| 3743 | int i; |
| 3744 | |
| 3745 | /* Indicate that all slots except the last holds invalid data. */ |
| 3746 | for (i = 0; i < MAX_INSNS_PER_PEEP25; ++i) |
| 3747 | peep2_insn_data[i].insn = NULLnullptr; |
| 3748 | peep2_current_count = 0; |
| 3749 | |
| 3750 | /* Indicate that the last slot contains live_after data. */ |
| 3751 | peep2_insn_data[MAX_INSNS_PER_PEEP25].insn = PEEP2_EOBinvalid_insn_rtx; |
| 3752 | peep2_current = MAX_INSNS_PER_PEEP25; |
| 3753 | |
| 3754 | COPY_REG_SET (peep2_insn_data[MAX_INSNS_PER_PEEP2].live_before, live)bitmap_copy (peep2_insn_data[5].live_before, live); |
| 3755 | } |
| 3756 | |
| 3757 | /* Copies frame related info of an insn (OLD_INSN) to the single |
| 3758 | insn (NEW_INSN) that was obtained by splitting OLD_INSN. */ |
| 3759 | |
| 3760 | void |
| 3761 | copy_frame_info_to_split_insn (rtx_insn *old_insn, rtx_insn *new_insn) |
| 3762 | { |
| 3763 | bool any_note = false; |
| 3764 | rtx note; |
| 3765 | |
| 3766 | if (!RTX_FRAME_RELATED_P (old_insn)(__extension__ ({ __typeof ((old_insn)) const _rtx = ((old_insn )); if (((enum rtx_code) (_rtx)->code) != DEBUG_INSN && ((enum rtx_code) (_rtx)->code) != INSN && ((enum rtx_code ) (_rtx)->code) != CALL_INSN && ((enum rtx_code) ( _rtx)->code) != JUMP_INSN && ((enum rtx_code) (_rtx )->code) != BARRIER && ((enum rtx_code) (_rtx)-> code) != SET) rtl_check_failed_flag ("RTX_FRAME_RELATED_P",_rtx , "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3766, __FUNCTION__); _rtx; })->frame_related)) |
| 3767 | return; |
| 3768 | |
| 3769 | RTX_FRAME_RELATED_P (new_insn)(__extension__ ({ __typeof ((new_insn)) const _rtx = ((new_insn )); if (((enum rtx_code) (_rtx)->code) != DEBUG_INSN && ((enum rtx_code) (_rtx)->code) != INSN && ((enum rtx_code ) (_rtx)->code) != CALL_INSN && ((enum rtx_code) ( _rtx)->code) != JUMP_INSN && ((enum rtx_code) (_rtx )->code) != BARRIER && ((enum rtx_code) (_rtx)-> code) != SET) rtl_check_failed_flag ("RTX_FRAME_RELATED_P",_rtx , "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3769, __FUNCTION__); _rtx; })->frame_related) = 1; |
| 3770 | |
| 3771 | /* Allow the backend to fill in a note during the split. */ |
| 3772 | for (note = REG_NOTES (new_insn)(((new_insn)->u.fld[6]).rt_rtx); note ; note = XEXP (note, 1)(((note)->u.fld[1]).rt_rtx)) |
| 3773 | switch (REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode))) |
| 3774 | { |
| 3775 | case REG_FRAME_RELATED_EXPR: |
| 3776 | case REG_CFA_DEF_CFA: |
| 3777 | case REG_CFA_ADJUST_CFA: |
| 3778 | case REG_CFA_OFFSET: |
| 3779 | case REG_CFA_REGISTER: |
| 3780 | case REG_CFA_EXPRESSION: |
| 3781 | case REG_CFA_RESTORE: |
| 3782 | case REG_CFA_SET_VDRAP: |
| 3783 | any_note = true; |
| 3784 | break; |
| 3785 | default: |
| 3786 | break; |
| 3787 | } |
| 3788 | |
| 3789 | /* If the backend didn't supply a note, copy one over. */ |
| 3790 | if (!any_note) |
| 3791 | for (note = REG_NOTES (old_insn)(((old_insn)->u.fld[6]).rt_rtx); note ; note = XEXP (note, 1)(((note)->u.fld[1]).rt_rtx)) |
| 3792 | switch (REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode))) |
| 3793 | { |
| 3794 | case REG_FRAME_RELATED_EXPR: |
| 3795 | case REG_CFA_DEF_CFA: |
| 3796 | case REG_CFA_ADJUST_CFA: |
| 3797 | case REG_CFA_OFFSET: |
| 3798 | case REG_CFA_REGISTER: |
| 3799 | case REG_CFA_EXPRESSION: |
| 3800 | case REG_CFA_RESTORE: |
| 3801 | case REG_CFA_SET_VDRAP: |
| 3802 | add_reg_note (new_insn, REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode)), XEXP (note, 0)(((note)->u.fld[0]).rt_rtx)); |
| 3803 | any_note = true; |
| 3804 | break; |
| 3805 | default: |
| 3806 | break; |
| 3807 | } |
| 3808 | |
| 3809 | /* If there still isn't a note, make sure the unwind info sees the |
| 3810 | same expression as before the split. */ |
| 3811 | if (!any_note) |
| 3812 | { |
| 3813 | rtx old_set, new_set; |
| 3814 | |
| 3815 | /* The old insn had better have been simple, or annotated. */ |
| 3816 | old_set = single_set (old_insn); |
| 3817 | gcc_assert (old_set != NULL)((void)(!(old_set != nullptr) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3817, __FUNCTION__), 0 : 0)); |
| 3818 | |
| 3819 | new_set = single_set (new_insn); |
| 3820 | if (!new_set || !rtx_equal_p (new_set, old_set)) |
| 3821 | add_reg_note (new_insn, REG_FRAME_RELATED_EXPR, old_set); |
| 3822 | } |
| 3823 | |
| 3824 | /* Copy prologue/epilogue status. This is required in order to keep |
| 3825 | proper placement of EPILOGUE_BEG and the DW_CFA_remember_state. */ |
| 3826 | maybe_copy_prologue_epilogue_insn (old_insn, new_insn); |
| 3827 | } |
| 3828 | |
| 3829 | /* While scanning basic block BB, we found a match of length MATCH_LEN, |
| 3830 | starting at INSN. Perform the replacement, removing the old insns and |
| 3831 | replacing them with ATTEMPT. Returns the last insn emitted, or NULL |
| 3832 | if the replacement is rejected. */ |
| 3833 | |
| 3834 | static rtx_insn * |
| 3835 | peep2_attempt (basic_block bb, rtx_insn *insn, int match_len, rtx_insn *attempt) |
| 3836 | { |
| 3837 | int i; |
| 3838 | rtx_insn *last, *before_try, *x; |
| 3839 | rtx eh_note, as_note; |
| 3840 | rtx_insn *old_insn; |
| 3841 | rtx_insn *new_insn; |
| 3842 | bool was_call = false; |
| 3843 | |
| 3844 | /* If we are splitting an RTX_FRAME_RELATED_P insn, do not allow it to |
| 3845 | match more than one insn, or to be split into more than one insn. */ |
| 3846 | old_insn = peep2_insn_data[peep2_current].insn; |
| 3847 | if (RTX_FRAME_RELATED_P (old_insn)(__extension__ ({ __typeof ((old_insn)) const _rtx = ((old_insn )); if (((enum rtx_code) (_rtx)->code) != DEBUG_INSN && ((enum rtx_code) (_rtx)->code) != INSN && ((enum rtx_code ) (_rtx)->code) != CALL_INSN && ((enum rtx_code) ( _rtx)->code) != JUMP_INSN && ((enum rtx_code) (_rtx )->code) != BARRIER && ((enum rtx_code) (_rtx)-> code) != SET) rtl_check_failed_flag ("RTX_FRAME_RELATED_P",_rtx , "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3847, __FUNCTION__); _rtx; })->frame_related)) |
| 3848 | { |
| 3849 | if (match_len != 0) |
| 3850 | return NULLnullptr; |
| 3851 | |
| 3852 | /* Look for one "active" insn. I.e. ignore any "clobber" insns that |
| 3853 | may be in the stream for the purpose of register allocation. */ |
| 3854 | if (active_insn_p (attempt)) |
| 3855 | new_insn = attempt; |
| 3856 | else |
| 3857 | new_insn = next_active_insn (attempt); |
| 3858 | if (next_active_insn (new_insn)) |
| 3859 | return NULLnullptr; |
| 3860 | |
| 3861 | /* We have a 1-1 replacement. Copy over any frame-related info. */ |
| 3862 | copy_frame_info_to_split_insn (old_insn, new_insn); |
| 3863 | } |
| 3864 | |
| 3865 | /* If we are splitting a CALL_INSN, look for the CALL_INSN |
| 3866 | in SEQ and copy our CALL_INSN_FUNCTION_USAGE and other |
| 3867 | cfg-related call notes. */ |
| 3868 | for (i = 0; i <= match_len; ++i) |
| 3869 | { |
| 3870 | int j; |
| 3871 | rtx note; |
| 3872 | |
| 3873 | j = peep2_buf_position (peep2_current + i); |
| 3874 | old_insn = peep2_insn_data[j].insn; |
| 3875 | if (!CALL_P (old_insn)(((enum rtx_code) (old_insn)->code) == CALL_INSN)) |
| 3876 | continue; |
| 3877 | was_call = true; |
| 3878 | |
| 3879 | new_insn = attempt; |
| 3880 | while (new_insn != NULL_RTX(rtx) 0) |
| 3881 | { |
| 3882 | if (CALL_P (new_insn)(((enum rtx_code) (new_insn)->code) == CALL_INSN)) |
| 3883 | break; |
| 3884 | new_insn = NEXT_INSN (new_insn); |
| 3885 | } |
| 3886 | |
| 3887 | gcc_assert (new_insn != NULL_RTX)((void)(!(new_insn != (rtx) 0) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3887, __FUNCTION__), 0 : 0)); |
| 3888 | |
| 3889 | CALL_INSN_FUNCTION_USAGE (new_insn)(((new_insn)->u.fld[7]).rt_rtx) |
| 3890 | = CALL_INSN_FUNCTION_USAGE (old_insn)(((old_insn)->u.fld[7]).rt_rtx); |
| 3891 | SIBLING_CALL_P (new_insn)(__extension__ ({ __typeof ((new_insn)) const _rtx = ((new_insn )); if (((enum rtx_code) (_rtx)->code) != CALL_INSN) rtl_check_failed_flag ("SIBLING_CALL_P", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3891, __FUNCTION__); _rtx; })->jump) = SIBLING_CALL_P (old_insn)(__extension__ ({ __typeof ((old_insn)) const _rtx = ((old_insn )); if (((enum rtx_code) (_rtx)->code) != CALL_INSN) rtl_check_failed_flag ("SIBLING_CALL_P", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3891, __FUNCTION__); _rtx; })->jump); |
| 3892 | |
| 3893 | for (note = REG_NOTES (old_insn)(((old_insn)->u.fld[6]).rt_rtx); |
| 3894 | note; |
| 3895 | note = XEXP (note, 1)(((note)->u.fld[1]).rt_rtx)) |
| 3896 | switch (REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode))) |
| 3897 | { |
| 3898 | case REG_NORETURN: |
| 3899 | case REG_SETJMP: |
| 3900 | case REG_TM: |
| 3901 | case REG_CALL_NOCF_CHECK: |
| 3902 | add_reg_note (new_insn, REG_NOTE_KIND (note)((enum reg_note) ((machine_mode) (note)->mode)), |
| 3903 | XEXP (note, 0)(((note)->u.fld[0]).rt_rtx)); |
| 3904 | break; |
| 3905 | default: |
| 3906 | /* Discard all other reg notes. */ |
| 3907 | break; |
| 3908 | } |
| 3909 | |
| 3910 | /* Croak if there is another call in the sequence. */ |
| 3911 | while (++i <= match_len) |
| 3912 | { |
| 3913 | j = peep2_buf_position (peep2_current + i); |
| 3914 | old_insn = peep2_insn_data[j].insn; |
| 3915 | gcc_assert (!CALL_P (old_insn))((void)(!(!(((enum rtx_code) (old_insn)->code) == CALL_INSN )) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3915, __FUNCTION__), 0 : 0)); |
| 3916 | } |
| 3917 | break; |
| 3918 | } |
| 3919 | |
| 3920 | /* If we matched any instruction that had a REG_ARGS_SIZE, then |
| 3921 | move those notes over to the new sequence. */ |
| 3922 | as_note = NULLnullptr; |
| 3923 | for (i = match_len; i >= 0; --i) |
| 3924 | { |
| 3925 | int j = peep2_buf_position (peep2_current + i); |
| 3926 | old_insn = peep2_insn_data[j].insn; |
| 3927 | |
| 3928 | as_note = find_reg_note (old_insn, REG_ARGS_SIZE, NULLnullptr); |
| 3929 | if (as_note) |
| 3930 | break; |
| 3931 | } |
| 3932 | |
| 3933 | i = peep2_buf_position (peep2_current + match_len); |
| 3934 | eh_note = find_reg_note (peep2_insn_data[i].insn, REG_EH_REGION, NULL_RTX(rtx) 0); |
| 3935 | |
| 3936 | /* Replace the old sequence with the new. */ |
| 3937 | rtx_insn *peepinsn = peep2_insn_data[i].insn; |
| 3938 | last = emit_insn_after_setloc (attempt, |
| 3939 | peep2_insn_data[i].insn, |
| 3940 | INSN_LOCATION (peepinsn)); |
| 3941 | if (JUMP_P (peepinsn)(((enum rtx_code) (peepinsn)->code) == JUMP_INSN) && JUMP_P (last)(((enum rtx_code) (last)->code) == JUMP_INSN)) |
| 3942 | CROSSING_JUMP_P (last)(__extension__ ({ __typeof ((last)) const _rtx = ((last)); if (((enum rtx_code) (_rtx)->code) != JUMP_INSN) rtl_check_failed_flag ("CROSSING_JUMP_P", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3942, __FUNCTION__); _rtx; })->jump) = CROSSING_JUMP_P (peepinsn)(__extension__ ({ __typeof ((peepinsn)) const _rtx = ((peepinsn )); if (((enum rtx_code) (_rtx)->code) != JUMP_INSN) rtl_check_failed_flag ("CROSSING_JUMP_P", _rtx, "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 3942, __FUNCTION__); _rtx; })->jump); |
| 3943 | before_try = PREV_INSN (insn); |
| 3944 | delete_insn_chain (insn, peep2_insn_data[i].insn, false); |
| 3945 | |
| 3946 | /* Re-insert the EH_REGION notes. */ |
| 3947 | if (eh_note || (was_call && nonlocal_goto_handler_labels((&x_rtl)->x_nonlocal_goto_handler_labels))) |
| 3948 | { |
| 3949 | edge eh_edge; |
| 3950 | edge_iterator ei; |
| 3951 | |
| 3952 | FOR_EACH_EDGE (eh_edge, ei, bb->succs)for ((ei) = ei_start_1 (&((bb->succs))); ei_cond ((ei) , &(eh_edge)); ei_next (&(ei))) |
| 3953 | if (eh_edge->flags & (EDGE_EH | EDGE_ABNORMAL_CALL)) |
| 3954 | break; |
| 3955 | |
| 3956 | if (eh_note) |
| 3957 | copy_reg_eh_region_note_backward (eh_note, last, before_try); |
| 3958 | |
| 3959 | if (eh_edge) |
| 3960 | for (x = last; x != before_try; x = PREV_INSN (x)) |
| 3961 | if (x != BB_END (bb)(bb)->il.x.rtl->end_ |
| 3962 | && (can_throw_internal (x) |
| 3963 | || can_nonlocal_goto (x))) |
| 3964 | { |
| 3965 | edge nfte, nehe; |
| 3966 | int flags; |
| 3967 | |
| 3968 | nfte = split_block (bb, x); |
| 3969 | flags = (eh_edge->flags |
| 3970 | & (EDGE_EH | EDGE_ABNORMAL)); |
| 3971 | if (CALL_P (x)(((enum rtx_code) (x)->code) == CALL_INSN)) |
| 3972 | flags |= EDGE_ABNORMAL_CALL; |
| 3973 | nehe = make_edge (nfte->src, eh_edge->dest, |
| 3974 | flags); |
| 3975 | |
| 3976 | nehe->probability = eh_edge->probability; |
| 3977 | nfte->probability = nehe->probability.invert (); |
| 3978 | |
| 3979 | peep2_do_cleanup_cfg |= purge_dead_edges (nfte->dest); |
| 3980 | bb = nfte->src; |
| 3981 | eh_edge = nehe; |
| 3982 | } |
| 3983 | |
| 3984 | /* Converting possibly trapping insn to non-trapping is |
| 3985 | possible. Zap dummy outgoing edges. */ |
| 3986 | peep2_do_cleanup_cfg |= purge_dead_edges (bb); |
| 3987 | } |
| 3988 | |
| 3989 | /* Re-insert the ARGS_SIZE notes. */ |
| 3990 | if (as_note) |
| 3991 | fixup_args_size_notes (before_try, last, get_args_size (as_note)); |
| 3992 | |
| 3993 | /* Scan the new insns for embedded side effects and add appropriate |
| 3994 | REG_INC notes. */ |
| 3995 | if (AUTO_INC_DEC0) |
| 3996 | for (x = last; x != before_try; x = PREV_INSN (x)) |
| 3997 | if (NONDEBUG_INSN_P (x)((((enum rtx_code) (x)->code) == INSN) || (((enum rtx_code ) (x)->code) == JUMP_INSN) || (((enum rtx_code) (x)->code ) == CALL_INSN))) |
| 3998 | add_auto_inc_notes (x, PATTERN (x)); |
| 3999 | |
| 4000 | /* If we generated a jump instruction, it won't have |
| 4001 | JUMP_LABEL set. Recompute after we're done. */ |
| 4002 | for (x = last; x != before_try; x = PREV_INSN (x)) |
| 4003 | if (JUMP_P (x)(((enum rtx_code) (x)->code) == JUMP_INSN)) |
| 4004 | { |
| 4005 | peep2_do_rebuild_jump_labels = true; |
| 4006 | break; |
| 4007 | } |
| 4008 | |
| 4009 | return last; |
| 4010 | } |
| 4011 | |
| 4012 | /* After performing a replacement in basic block BB, fix up the life |
| 4013 | information in our buffer. LAST is the last of the insns that we |
| 4014 | emitted as a replacement. PREV is the insn before the start of |
| 4015 | the replacement. MATCH_LEN is the number of instructions that were |
| 4016 | matched, and which now need to be replaced in the buffer. */ |
| 4017 | |
| 4018 | static void |
| 4019 | peep2_update_life (basic_block bb, int match_len, rtx_insn *last, |
| 4020 | rtx_insn *prev) |
| 4021 | { |
| 4022 | int i = peep2_buf_position (peep2_current + match_len + 1); |
| 4023 | rtx_insn *x; |
| 4024 | regset_head live; |
| 4025 | |
| 4026 | INIT_REG_SET (&live)bitmap_initialize (&live, ®_obstack); |
| 4027 | COPY_REG_SET (&live, peep2_insn_data[i].live_before)bitmap_copy (&live, peep2_insn_data[i].live_before); |
| 4028 | |
| 4029 | gcc_assert (peep2_current_count >= match_len + 1)((void)(!(peep2_current_count >= match_len + 1) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4029, __FUNCTION__), 0 : 0)); |
| 4030 | peep2_current_count -= match_len + 1; |
| 4031 | |
| 4032 | x = last; |
| 4033 | do |
| 4034 | { |
| 4035 | if (INSN_P (x)(((((enum rtx_code) (x)->code) == INSN) || (((enum rtx_code ) (x)->code) == JUMP_INSN) || (((enum rtx_code) (x)->code ) == CALL_INSN)) || (((enum rtx_code) (x)->code) == DEBUG_INSN ))) |
| 4036 | { |
| 4037 | df_insn_rescan (x); |
| 4038 | if (peep2_current_count < MAX_INSNS_PER_PEEP25) |
| 4039 | { |
| 4040 | peep2_current_count++; |
| 4041 | if (--i < 0) |
| 4042 | i = MAX_INSNS_PER_PEEP25; |
| 4043 | peep2_insn_data[i].insn = x; |
| 4044 | df_simulate_one_insn_backwards (bb, x, &live); |
| 4045 | COPY_REG_SET (peep2_insn_data[i].live_before, &live)bitmap_copy (peep2_insn_data[i].live_before, &live); |
| 4046 | } |
| 4047 | } |
| 4048 | x = PREV_INSN (x); |
| 4049 | } |
| 4050 | while (x != prev); |
| 4051 | CLEAR_REG_SET (&live)bitmap_clear (&live); |
| 4052 | |
| 4053 | peep2_current = i; |
| 4054 | } |
| 4055 | |
| 4056 | /* Add INSN, which is in BB, at the end of the peep2 insn buffer if possible. |
| 4057 | Return true if we added it, false otherwise. The caller will try to match |
| 4058 | peepholes against the buffer if we return false; otherwise it will try to |
| 4059 | add more instructions to the buffer. */ |
| 4060 | |
| 4061 | static bool |
| 4062 | peep2_fill_buffer (basic_block bb, rtx_insn *insn, regset live) |
| 4063 | { |
| 4064 | int pos; |
| 4065 | |
| 4066 | /* Once we have filled the maximum number of insns the buffer can hold, |
| 4067 | allow the caller to match the insns against peepholes. We wait until |
| 4068 | the buffer is full in case the target has similar peepholes of different |
| 4069 | length; we always want to match the longest if possible. */ |
| 4070 | if (peep2_current_count == MAX_INSNS_PER_PEEP25) |
| 4071 | return false; |
| 4072 | |
| 4073 | /* If an insn has RTX_FRAME_RELATED_P set, do not allow it to be matched with |
| 4074 | any other pattern, lest it change the semantics of the frame info. */ |
| 4075 | if (RTX_FRAME_RELATED_P (insn)(__extension__ ({ __typeof ((insn)) const _rtx = ((insn)); if (((enum rtx_code) (_rtx)->code) != DEBUG_INSN && ( (enum rtx_code) (_rtx)->code) != INSN && ((enum rtx_code ) (_rtx)->code) != CALL_INSN && ((enum rtx_code) ( _rtx)->code) != JUMP_INSN && ((enum rtx_code) (_rtx )->code) != BARRIER && ((enum rtx_code) (_rtx)-> code) != SET) rtl_check_failed_flag ("RTX_FRAME_RELATED_P",_rtx , "/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4075, __FUNCTION__); _rtx; })->frame_related)) |
| 4076 | { |
| 4077 | /* Let the buffer drain first. */ |
| 4078 | if (peep2_current_count > 0) |
| 4079 | return false; |
| 4080 | /* Now the insn will be the only thing in the buffer. */ |
| 4081 | } |
| 4082 | |
| 4083 | pos = peep2_buf_position (peep2_current + peep2_current_count); |
| 4084 | peep2_insn_data[pos].insn = insn; |
| 4085 | COPY_REG_SET (peep2_insn_data[pos].live_before, live)bitmap_copy (peep2_insn_data[pos].live_before, live); |
| 4086 | peep2_current_count++; |
| 4087 | |
| 4088 | df_simulate_one_insn_forwards (bb, insn, live); |
| 4089 | return true; |
| 4090 | } |
| 4091 | |
| 4092 | /* Perform the peephole2 optimization pass. */ |
| 4093 | |
| 4094 | static void |
| 4095 | peephole2_optimize (void) |
| 4096 | { |
| 4097 | rtx_insn *insn; |
| 4098 | bitmap live; |
| 4099 | int i; |
| 4100 | basic_block bb; |
| 4101 | |
| 4102 | peep2_do_cleanup_cfg = false; |
| 4103 | peep2_do_rebuild_jump_labels = false; |
| 4104 | |
| 4105 | df_set_flags (DF_LR_RUN_DCE); |
| 4106 | df_note_add_problem (); |
| 4107 | df_analyze (); |
| 4108 | |
| 4109 | /* Initialize the regsets we're going to use. */ |
| 4110 | for (i = 0; i < MAX_INSNS_PER_PEEP25 + 1; ++i) |
| 4111 | peep2_insn_data[i].live_before = BITMAP_ALLOCbitmap_alloc (®_obstack); |
| 4112 | search_ofs = 0; |
| 4113 | live = BITMAP_ALLOCbitmap_alloc (®_obstack); |
| 4114 | |
| 4115 | FOR_EACH_BB_REVERSE_FN (bb, cfun)for (bb = ((cfun + 0))->cfg->x_exit_block_ptr->prev_bb ; bb != ((cfun + 0))->cfg->x_entry_block_ptr; bb = bb-> prev_bb) |
| 4116 | { |
| 4117 | bool past_end = false; |
| 4118 | int pos; |
| 4119 | |
| 4120 | rtl_profile_for_bb (bb); |
| 4121 | |
| 4122 | /* Start up propagation. */ |
| 4123 | bitmap_copy (live, DF_LR_IN (bb)(&(df_lr_get_bb_info ((bb)->index))->in)); |
| 4124 | df_simulate_initialize_forwards (bb, live); |
| 4125 | peep2_reinit_state (live); |
| 4126 | |
| 4127 | insn = BB_HEAD (bb)(bb)->il.x.head_; |
| 4128 | for (;;) |
| 4129 | { |
| 4130 | rtx_insn *attempt, *head; |
| 4131 | int match_len; |
| 4132 | |
| 4133 | if (!past_end && !NONDEBUG_INSN_P (insn)((((enum rtx_code) (insn)->code) == INSN) || (((enum rtx_code ) (insn)->code) == JUMP_INSN) || (((enum rtx_code) (insn)-> code) == CALL_INSN))) |
| 4134 | { |
| 4135 | next_insn: |
| 4136 | insn = NEXT_INSN (insn); |
| 4137 | if (insn == NEXT_INSN (BB_END (bb)(bb)->il.x.rtl->end_)) |
| 4138 | past_end = true; |
| 4139 | continue; |
| 4140 | } |
| 4141 | if (!past_end && peep2_fill_buffer (bb, insn, live)) |
| 4142 | goto next_insn; |
| 4143 | |
| 4144 | /* If we did not fill an empty buffer, it signals the end of the |
| 4145 | block. */ |
| 4146 | if (peep2_current_count == 0) |
| 4147 | break; |
| 4148 | |
| 4149 | /* The buffer filled to the current maximum, so try to match. */ |
| 4150 | |
| 4151 | pos = peep2_buf_position (peep2_current + peep2_current_count); |
| 4152 | peep2_insn_data[pos].insn = PEEP2_EOBinvalid_insn_rtx; |
| 4153 | COPY_REG_SET (peep2_insn_data[pos].live_before, live)bitmap_copy (peep2_insn_data[pos].live_before, live); |
| 4154 | |
| 4155 | /* Match the peephole. */ |
| 4156 | head = peep2_insn_data[peep2_current].insn; |
| 4157 | attempt = peephole2_insns (PATTERN (head), head, &match_len); |
| 4158 | if (attempt != NULLnullptr) |
| 4159 | { |
| 4160 | rtx_insn *last = peep2_attempt (bb, head, match_len, attempt); |
| 4161 | if (last) |
| 4162 | { |
| 4163 | peep2_update_life (bb, match_len, last, PREV_INSN (attempt)); |
| 4164 | continue; |
| 4165 | } |
| 4166 | } |
| 4167 | |
| 4168 | /* No match: advance the buffer by one insn. */ |
| 4169 | peep2_current = peep2_buf_position (peep2_current + 1); |
| 4170 | peep2_current_count--; |
| 4171 | } |
| 4172 | } |
| 4173 | |
| 4174 | default_rtl_profile (); |
| 4175 | for (i = 0; i < MAX_INSNS_PER_PEEP25 + 1; ++i) |
| 4176 | BITMAP_FREE (peep2_insn_data[i].live_before)((void) (bitmap_obstack_free ((bitmap) peep2_insn_data[i].live_before ), (peep2_insn_data[i].live_before) = (bitmap) nullptr)); |
| 4177 | BITMAP_FREE (live)((void) (bitmap_obstack_free ((bitmap) live), (live) = (bitmap ) nullptr)); |
| 4178 | if (peep2_do_rebuild_jump_labels) |
| 4179 | rebuild_jump_labels (get_insns ()); |
| 4180 | if (peep2_do_cleanup_cfg) |
| 4181 | cleanup_cfg (CLEANUP_CFG_CHANGED64); |
| 4182 | } |
| 4183 | |
| 4184 | /* Common predicates for use with define_bypass. */ |
| 4185 | |
| 4186 | /* Helper function for store_data_bypass_p, handle just a single SET |
| 4187 | IN_SET. */ |
| 4188 | |
| 4189 | static bool |
| 4190 | store_data_bypass_p_1 (rtx_insn *out_insn, rtx in_set) |
| 4191 | { |
| 4192 | if (!MEM_P (SET_DEST (in_set))(((enum rtx_code) ((((in_set)->u.fld[0]).rt_rtx))->code ) == MEM)) |
| 4193 | return false; |
| 4194 | |
| 4195 | rtx out_set = single_set (out_insn); |
| 4196 | if (out_set) |
| 4197 | return !reg_mentioned_p (SET_DEST (out_set)(((out_set)->u.fld[0]).rt_rtx), SET_DEST (in_set)(((in_set)->u.fld[0]).rt_rtx)); |
| 4198 | |
| 4199 | rtx out_pat = PATTERN (out_insn); |
| 4200 | if (GET_CODE (out_pat)((enum rtx_code) (out_pat)->code) != PARALLEL) |
| 4201 | return false; |
| 4202 | |
| 4203 | for (int i = 0; i < XVECLEN (out_pat, 0)(((((out_pat)->u.fld[0]).rt_rtvec))->num_elem); i++) |
| 4204 | { |
| 4205 | rtx out_exp = XVECEXP (out_pat, 0, i)(((((out_pat)->u.fld[0]).rt_rtvec))->elem[i]); |
| 4206 | |
| 4207 | if (GET_CODE (out_exp)((enum rtx_code) (out_exp)->code) == CLOBBER || GET_CODE (out_exp)((enum rtx_code) (out_exp)->code) == USE) |
| 4208 | continue; |
| 4209 | |
| 4210 | gcc_assert (GET_CODE (out_exp) == SET)((void)(!(((enum rtx_code) (out_exp)->code) == SET) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4210, __FUNCTION__), 0 : 0)); |
| 4211 | |
| 4212 | if (reg_mentioned_p (SET_DEST (out_exp)(((out_exp)->u.fld[0]).rt_rtx), SET_DEST (in_set)(((in_set)->u.fld[0]).rt_rtx))) |
| 4213 | return false; |
| 4214 | } |
| 4215 | |
| 4216 | return true; |
| 4217 | } |
| 4218 | |
| 4219 | /* True if the dependency between OUT_INSN and IN_INSN is on the store |
| 4220 | data not the address operand(s) of the store. IN_INSN and OUT_INSN |
| 4221 | must be either a single_set or a PARALLEL with SETs inside. */ |
| 4222 | |
| 4223 | int |
| 4224 | store_data_bypass_p (rtx_insn *out_insn, rtx_insn *in_insn) |
| 4225 | { |
| 4226 | rtx in_set = single_set (in_insn); |
| 4227 | if (in_set) |
| 4228 | return store_data_bypass_p_1 (out_insn, in_set); |
| 4229 | |
| 4230 | rtx in_pat = PATTERN (in_insn); |
| 4231 | if (GET_CODE (in_pat)((enum rtx_code) (in_pat)->code) != PARALLEL) |
| 4232 | return false; |
| 4233 | |
| 4234 | for (int i = 0; i < XVECLEN (in_pat, 0)(((((in_pat)->u.fld[0]).rt_rtvec))->num_elem); i++) |
| 4235 | { |
| 4236 | rtx in_exp = XVECEXP (in_pat, 0, i)(((((in_pat)->u.fld[0]).rt_rtvec))->elem[i]); |
| 4237 | |
| 4238 | if (GET_CODE (in_exp)((enum rtx_code) (in_exp)->code) == CLOBBER || GET_CODE (in_exp)((enum rtx_code) (in_exp)->code) == USE) |
| 4239 | continue; |
| 4240 | |
| 4241 | gcc_assert (GET_CODE (in_exp) == SET)((void)(!(((enum rtx_code) (in_exp)->code) == SET) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4241, __FUNCTION__), 0 : 0)); |
| 4242 | |
| 4243 | if (!store_data_bypass_p_1 (out_insn, in_exp)) |
| 4244 | return false; |
| 4245 | } |
| 4246 | |
| 4247 | return true; |
| 4248 | } |
| 4249 | |
| 4250 | /* True if the dependency between OUT_INSN and IN_INSN is in the IF_THEN_ELSE |
| 4251 | condition, and not the THEN or ELSE branch. OUT_INSN may be either a single |
| 4252 | or multiple set; IN_INSN should be single_set for truth, but for convenience |
| 4253 | of insn categorization may be any JUMP or CALL insn. */ |
| 4254 | |
| 4255 | int |
| 4256 | if_test_bypass_p (rtx_insn *out_insn, rtx_insn *in_insn) |
| 4257 | { |
| 4258 | rtx out_set, in_set; |
| 4259 | |
| 4260 | in_set = single_set (in_insn); |
| 4261 | if (! in_set) |
| 4262 | { |
| 4263 | gcc_assert (JUMP_P (in_insn) || CALL_P (in_insn))((void)(!((((enum rtx_code) (in_insn)->code) == JUMP_INSN) || (((enum rtx_code) (in_insn)->code) == CALL_INSN)) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4263, __FUNCTION__), 0 : 0)); |
| 4264 | return false; |
| 4265 | } |
| 4266 | |
| 4267 | if (GET_CODE (SET_SRC (in_set))((enum rtx_code) ((((in_set)->u.fld[1]).rt_rtx))->code) != IF_THEN_ELSE) |
| 4268 | return false; |
| 4269 | in_set = SET_SRC (in_set)(((in_set)->u.fld[1]).rt_rtx); |
| 4270 | |
| 4271 | out_set = single_set (out_insn); |
| 4272 | if (out_set) |
| 4273 | { |
| 4274 | if (reg_mentioned_p (SET_DEST (out_set)(((out_set)->u.fld[0]).rt_rtx), XEXP (in_set, 1)(((in_set)->u.fld[1]).rt_rtx)) |
| 4275 | || reg_mentioned_p (SET_DEST (out_set)(((out_set)->u.fld[0]).rt_rtx), XEXP (in_set, 2)(((in_set)->u.fld[2]).rt_rtx))) |
| 4276 | return false; |
| 4277 | } |
| 4278 | else |
| 4279 | { |
| 4280 | rtx out_pat; |
| 4281 | int i; |
| 4282 | |
| 4283 | out_pat = PATTERN (out_insn); |
| 4284 | gcc_assert (GET_CODE (out_pat) == PARALLEL)((void)(!(((enum rtx_code) (out_pat)->code) == PARALLEL) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4284, __FUNCTION__), 0 : 0)); |
| 4285 | |
| 4286 | for (i = 0; i < XVECLEN (out_pat, 0)(((((out_pat)->u.fld[0]).rt_rtvec))->num_elem); i++) |
| 4287 | { |
| 4288 | rtx exp = XVECEXP (out_pat, 0, i)(((((out_pat)->u.fld[0]).rt_rtvec))->elem[i]); |
| 4289 | |
| 4290 | if (GET_CODE (exp)((enum rtx_code) (exp)->code) == CLOBBER) |
| 4291 | continue; |
| 4292 | |
| 4293 | gcc_assert (GET_CODE (exp) == SET)((void)(!(((enum rtx_code) (exp)->code) == SET) ? fancy_abort ("/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/recog.c" , 4293, __FUNCTION__), 0 : 0)); |
| 4294 | |
| 4295 | if (reg_mentioned_p (SET_DEST (out_set)(((out_set)->u.fld[0]).rt_rtx), XEXP (in_set, 1)(((in_set)->u.fld[1]).rt_rtx)) |
| 4296 | || reg_mentioned_p (SET_DEST (out_set)(((out_set)->u.fld[0]).rt_rtx), XEXP (in_set, 2)(((in_set)->u.fld[2]).rt_rtx))) |
| 4297 | return false; |
| 4298 | } |
| 4299 | } |
| 4300 | |
| 4301 | return true; |
| 4302 | } |
| 4303 | |
| 4304 | static unsigned int |
| 4305 | rest_of_handle_peephole2 (void) |
| 4306 | { |
| 4307 | if (HAVE_peephole21) |
| 4308 | peephole2_optimize (); |
| 4309 | |
| 4310 | return 0; |
| 4311 | } |
| 4312 | |
| 4313 | namespace { |
| 4314 | |
| 4315 | const pass_data pass_data_peephole2 = |
| 4316 | { |
| 4317 | RTL_PASS, /* type */ |
| 4318 | "peephole2", /* name */ |
| 4319 | OPTGROUP_NONE, /* optinfo_flags */ |
| 4320 | TV_PEEPHOLE2, /* tv_id */ |
| 4321 | 0, /* properties_required */ |
| 4322 | 0, /* properties_provided */ |
| 4323 | 0, /* properties_destroyed */ |
| 4324 | 0, /* todo_flags_start */ |
| 4325 | TODO_df_finish(1 << 17), /* todo_flags_finish */ |
| 4326 | }; |
| 4327 | |
| 4328 | class pass_peephole2 : public rtl_opt_pass |
| 4329 | { |
| 4330 | public: |
| 4331 | pass_peephole2 (gcc::context *ctxt) |
| 4332 | : rtl_opt_pass (pass_data_peephole2, ctxt) |
| 4333 | {} |
| 4334 | |
| 4335 | /* opt_pass methods: */ |
| 4336 | /* The epiphany backend creates a second instance of this pass, so we need |
| 4337 | a clone method. */ |
| 4338 | opt_pass * clone () { return new pass_peephole2 (m_ctxt); } |
| 4339 | virtual bool gate (function *) { return (optimizeglobal_options.x_optimize > 0 && flag_peephole2global_options.x_flag_peephole2); } |
| 4340 | virtual unsigned int execute (function *) |
| 4341 | { |
| 4342 | return rest_of_handle_peephole2 (); |
| 4343 | } |
| 4344 | |
| 4345 | }; // class pass_peephole2 |
| 4346 | |
| 4347 | } // anon namespace |
| 4348 | |
| 4349 | rtl_opt_pass * |
| 4350 | make_pass_peephole2 (gcc::context *ctxt) |
| 4351 | { |
| 4352 | return new pass_peephole2 (ctxt); |
| 4353 | } |
| 4354 | |
| 4355 | namespace { |
| 4356 | |
| 4357 | const pass_data pass_data_split_all_insns = |
| 4358 | { |
| 4359 | RTL_PASS, /* type */ |
| 4360 | "split1", /* name */ |
| 4361 | OPTGROUP_NONE, /* optinfo_flags */ |
| 4362 | TV_NONE, /* tv_id */ |
| 4363 | 0, /* properties_required */ |
| 4364 | PROP_rtl_split_insns(1 << 17), /* properties_provided */ |
| 4365 | 0, /* properties_destroyed */ |
| 4366 | 0, /* todo_flags_start */ |
| 4367 | 0, /* todo_flags_finish */ |
| 4368 | }; |
| 4369 | |
| 4370 | class pass_split_all_insns : public rtl_opt_pass |
| 4371 | { |
| 4372 | public: |
| 4373 | pass_split_all_insns (gcc::context *ctxt) |
| 4374 | : rtl_opt_pass (pass_data_split_all_insns, ctxt) |
| 4375 | {} |
| 4376 | |
| 4377 | /* opt_pass methods: */ |
| 4378 | /* The epiphany backend creates a second instance of this pass, so |
| 4379 | we need a clone method. */ |
| 4380 | opt_pass * clone () { return new pass_split_all_insns (m_ctxt); } |
| 4381 | virtual unsigned int execute (function *) |
| 4382 | { |
| 4383 | split_all_insns (); |
| 4384 | return 0; |
| 4385 | } |
| 4386 | |
| 4387 | }; // class pass_split_all_insns |
| 4388 | |
| 4389 | } // anon namespace |
| 4390 | |
| 4391 | rtl_opt_pass * |
| 4392 | make_pass_split_all_insns (gcc::context *ctxt) |
| 4393 | { |
| 4394 | return new pass_split_all_insns (ctxt); |
| 4395 | } |
| 4396 | |
| 4397 | namespace { |
| 4398 | |
| 4399 | const pass_data pass_data_split_after_reload = |
| 4400 | { |
| 4401 | RTL_PASS, /* type */ |
| 4402 | "split2", /* name */ |
| 4403 | OPTGROUP_NONE, /* optinfo_flags */ |
| 4404 | TV_NONE, /* tv_id */ |
| 4405 | 0, /* properties_required */ |
| 4406 | 0, /* properties_provided */ |
| 4407 | 0, /* properties_destroyed */ |
| 4408 | 0, /* todo_flags_start */ |
| 4409 | 0, /* todo_flags_finish */ |
| 4410 | }; |
| 4411 | |
| 4412 | class pass_split_after_reload : public rtl_opt_pass |
| 4413 | { |
| 4414 | public: |
| 4415 | pass_split_after_reload (gcc::context *ctxt) |
| 4416 | : rtl_opt_pass (pass_data_split_after_reload, ctxt) |
| 4417 | {} |
| 4418 | |
| 4419 | /* opt_pass methods: */ |
| 4420 | virtual bool gate (function *) |
| 4421 | { |
| 4422 | /* If optimizing, then go ahead and split insns now. */ |
| 4423 | return optimizeglobal_options.x_optimize > 0; |
| 4424 | } |
| 4425 | |
| 4426 | virtual unsigned int execute (function *) |
| 4427 | { |
| 4428 | split_all_insns (); |
| 4429 | return 0; |
| 4430 | } |
| 4431 | |
| 4432 | }; // class pass_split_after_reload |
| 4433 | |
| 4434 | } // anon namespace |
| 4435 | |
| 4436 | rtl_opt_pass * |
| 4437 | make_pass_split_after_reload (gcc::context *ctxt) |
| 4438 | { |
| 4439 | return new pass_split_after_reload (ctxt); |
| 4440 | } |
| 4441 | |
| 4442 | static bool |
| 4443 | enable_split_before_sched2 (void) |
| 4444 | { |
| 4445 | #ifdef INSN_SCHEDULING |
| 4446 | return optimizeglobal_options.x_optimize > 0 && flag_schedule_insns_after_reloadglobal_options.x_flag_schedule_insns_after_reload; |
| 4447 | #else |
| 4448 | return false; |
| 4449 | #endif |
| 4450 | } |
| 4451 | |
| 4452 | namespace { |
| 4453 | |
| 4454 | const pass_data pass_data_split_before_sched2 = |
| 4455 | { |
| 4456 | RTL_PASS, /* type */ |
| 4457 | "split3", /* name */ |
| 4458 | OPTGROUP_NONE, /* optinfo_flags */ |
| 4459 | TV_NONE, /* tv_id */ |
| 4460 | 0, /* properties_required */ |
| 4461 | 0, /* properties_provided */ |
| 4462 | 0, /* properties_destroyed */ |
| 4463 | 0, /* todo_flags_start */ |
| 4464 | 0, /* todo_flags_finish */ |
| 4465 | }; |
| 4466 | |
| 4467 | class pass_split_before_sched2 : public rtl_opt_pass |
| 4468 | { |
| 4469 | public: |
| 4470 | pass_split_before_sched2 (gcc::context *ctxt) |
| 4471 | : rtl_opt_pass (pass_data_split_before_sched2, ctxt) |
| 4472 | {} |
| 4473 | |
| 4474 | /* opt_pass methods: */ |
| 4475 | virtual bool gate (function *) |
| 4476 | { |
| 4477 | return enable_split_before_sched2 (); |
| 4478 | } |
| 4479 | |
| 4480 | virtual unsigned int execute (function *) |
| 4481 | { |
| 4482 | split_all_insns (); |
| 4483 | return 0; |
| 4484 | } |
| 4485 | |
| 4486 | }; // class pass_split_before_sched2 |
| 4487 | |
| 4488 | } // anon namespace |
| 4489 | |
| 4490 | rtl_opt_pass * |
| 4491 | make_pass_split_before_sched2 (gcc::context *ctxt) |
| 4492 | { |
| 4493 | return new pass_split_before_sched2 (ctxt); |
| 4494 | } |
| 4495 | |
| 4496 | namespace { |
| 4497 | |
| 4498 | const pass_data pass_data_split_before_regstack = |
| 4499 | { |
| 4500 | RTL_PASS, /* type */ |
| 4501 | "split4", /* name */ |
| 4502 | OPTGROUP_NONE, /* optinfo_flags */ |
| 4503 | TV_NONE, /* tv_id */ |
| 4504 | 0, /* properties_required */ |
| 4505 | 0, /* properties_provided */ |
| 4506 | 0, /* properties_destroyed */ |
| 4507 | 0, /* todo_flags_start */ |
| 4508 | 0, /* todo_flags_finish */ |
| 4509 | }; |
| 4510 | |
| 4511 | class pass_split_before_regstack : public rtl_opt_pass |
| 4512 | { |
| 4513 | public: |
| 4514 | pass_split_before_regstack (gcc::context *ctxt) |
| 4515 | : rtl_opt_pass (pass_data_split_before_regstack, ctxt) |
| 4516 | {} |
| 4517 | |
| 4518 | /* opt_pass methods: */ |
| 4519 | virtual bool gate (function *); |
| 4520 | virtual unsigned int execute (function *) |
| 4521 | { |
| 4522 | split_all_insns (); |
| 4523 | return 0; |
| 4524 | } |
| 4525 | |
| 4526 | }; // class pass_split_before_regstack |
| 4527 | |
| 4528 | bool |
| 4529 | pass_split_before_regstack::gate (function *) |
| 4530 | { |
| 4531 | #if HAVE_ATTR_length1 && defined (STACK_REGS) |
| 4532 | /* If flow2 creates new instructions which need splitting |
| 4533 | and scheduling after reload is not done, they might not be |
| 4534 | split until final which doesn't allow splitting |
| 4535 | if HAVE_ATTR_length. */ |
| 4536 | return !enable_split_before_sched2 (); |
| 4537 | #else |
| 4538 | return false; |
| 4539 | #endif |
| 4540 | } |
| 4541 | |
| 4542 | } // anon namespace |
| 4543 | |
| 4544 | rtl_opt_pass * |
| 4545 | make_pass_split_before_regstack (gcc::context *ctxt) |
| 4546 | { |
| 4547 | return new pass_split_before_regstack (ctxt); |
| 4548 | } |
| 4549 | |
| 4550 | namespace { |
| 4551 | |
| 4552 | const pass_data pass_data_split_for_shorten_branches = |
| 4553 | { |
| 4554 | RTL_PASS, /* type */ |
| 4555 | "split5", /* name */ |
| 4556 | OPTGROUP_NONE, /* optinfo_flags */ |
| 4557 | TV_NONE, /* tv_id */ |
| 4558 | 0, /* properties_required */ |
| 4559 | 0, /* properties_provided */ |
| 4560 | 0, /* properties_destroyed */ |
| 4561 | 0, /* todo_flags_start */ |
| 4562 | 0, /* todo_flags_finish */ |
| 4563 | }; |
| 4564 | |
| 4565 | class pass_split_for_shorten_branches : public rtl_opt_pass |
| 4566 | { |
| 4567 | public: |
| 4568 | pass_split_for_shorten_branches (gcc::context *ctxt) |
| 4569 | : rtl_opt_pass (pass_data_split_for_shorten_branches, ctxt) |
| 4570 | {} |
| 4571 | |
| 4572 | /* opt_pass methods: */ |
| 4573 | virtual bool gate (function *) |
| 4574 | { |
| 4575 | /* The placement of the splitting that we do for shorten_branches |
| 4576 | depends on whether regstack is used by the target or not. */ |
| 4577 | #if HAVE_ATTR_length1 && !defined (STACK_REGS) |
| 4578 | return true; |
| 4579 | #else |
| 4580 | return false; |
| 4581 | #endif |
| 4582 | } |
| 4583 | |
| 4584 | virtual unsigned int execute (function *) |
| 4585 | { |
| 4586 | return split_all_insns_noflow (); |
| 4587 | } |
| 4588 | |
| 4589 | }; // class pass_split_for_shorten_branches |
| 4590 | |
| 4591 | } // anon namespace |
| 4592 | |
| 4593 | rtl_opt_pass * |
| 4594 | make_pass_split_for_shorten_branches (gcc::context *ctxt) |
| 4595 | { |
| 4596 | return new pass_split_for_shorten_branches (ctxt); |
| 4597 | } |
| 4598 | |
| 4599 | /* (Re)initialize the target information after a change in target. */ |
| 4600 | |
| 4601 | void |
| 4602 | recog_init () |
| 4603 | { |
| 4604 | /* The information is zero-initialized, so we don't need to do anything |
| 4605 | first time round. */ |
| 4606 | if (!this_target_recog->x_initialized) |
| 4607 | { |
| 4608 | this_target_recog->x_initialized = true; |
| 4609 | return; |
| 4610 | } |
| 4611 | memset (this_target_recog->x_bool_attr_masks, 0, |
| 4612 | sizeof (this_target_recog->x_bool_attr_masks)); |
| 4613 | for (unsigned int i = 0; i < NUM_INSN_CODES; ++i) |
| 4614 | if (this_target_recog->x_op_alt[i]) |
| 4615 | { |
| 4616 | free (this_target_recog->x_op_alt[i]); |
| 4617 | this_target_recog->x_op_alt[i] = 0; |
| 4618 | } |
| 4619 | } |