1 /* Register Transfer Language (RTL) definitions for GCC 2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 2, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #ifndef GCC_RTL_H 23 #define GCC_RTL_H 24 25 #include "statistics.h" 26 #include "machmode.h" 27 #include "input.h" 28 #include "real.h" 29 30 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */ 31 #undef FLOAT /* Likewise. */ 32 #undef ABS /* Likewise. */ 33 #undef PC /* Likewise. */ 34 35 /* Value used by some passes to "recognize" noop moves as valid 36 instructions. */ 37 #define NOOP_MOVE_INSN_CODE INT_MAX 38 39 /* Register Transfer Language EXPRESSIONS CODES */ 40 41 #define RTX_CODE enum rtx_code 42 enum rtx_code { 43 44 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM , 45 #include "rtl.def" /* rtl expressions are documented here */ 46 #undef DEF_RTL_EXPR 47 48 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for 49 NUM_RTX_CODE. 50 Assumes default enum value assignment. */ 51 52 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE) 53 /* The cast here, saves many elsewhere. */ 54 55 /* Register Transfer Language EXPRESSIONS CODE CLASSES */ 56 57 enum rtx_class { 58 /* We check bit 0-1 of some rtx class codes in the predicates below. */ 59 60 /* Bit 0 = comparison if 0, arithmetic is 1 61 Bit 1 = 1 if commutative. */ 62 RTX_COMPARE, /* 0 */ 63 RTX_COMM_COMPARE, 64 RTX_BIN_ARITH, 65 RTX_COMM_ARITH, 66 67 /* Must follow the four preceding values. */ 68 RTX_UNARY, /* 4 */ 69 70 RTX_EXTRA, 71 RTX_MATCH, 72 RTX_INSN, 73 74 /* Bit 0 = 1 if constant. */ 75 RTX_OBJ, /* 8 */ 76 RTX_CONST_OBJ, 77 78 RTX_TERNARY, 79 RTX_BITFIELD_OPS, 80 RTX_AUTOINC 81 }; 82 83 #define RTX_OBJ_MASK (~1) 84 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK) 85 #define RTX_COMPARE_MASK (~1) 86 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK) 87 #define RTX_ARITHMETIC_MASK (~1) 88 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK) 89 #define RTX_BINARY_MASK (~3) 90 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK) 91 #define RTX_COMMUTATIVE_MASK (~2) 92 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK) 93 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK) 94 95 extern const unsigned char rtx_length[NUM_RTX_CODE]; 96 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)]) 97 98 extern const char * const rtx_name[NUM_RTX_CODE]; 99 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)]) 100 101 extern const char * const rtx_format[NUM_RTX_CODE]; 102 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)]) 103 104 extern const enum rtx_class rtx_class[NUM_RTX_CODE]; 105 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) 106 107 extern const unsigned char rtx_size[NUM_RTX_CODE]; 108 extern const unsigned char rtx_next[NUM_RTX_CODE]; 109 110 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label 111 relative to which the offsets are calculated, as explained in rtl.def. */ 112 typedef struct 113 { 114 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */ 115 unsigned min_align: 8; 116 /* Flags: */ 117 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */ 118 unsigned min_after_vec: 1; /* minimum address target label is 119 after the ADDR_DIFF_VEC. */ 120 unsigned max_after_vec: 1; /* maximum address target label is 121 after the ADDR_DIFF_VEC. */ 122 unsigned min_after_base: 1; /* minimum address target label is 123 after BASE. */ 124 unsigned max_after_base: 1; /* maximum address target label is 125 after BASE. */ 126 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */ 127 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */ 128 unsigned : 2; 129 unsigned scale : 8; 130 } addr_diff_vec_flags; 131 132 /* Structure used to describe the attributes of a MEM. These are hashed 133 so MEMs that the same attributes share a data structure. This means 134 they cannot be modified in place. If any element is nonzero, it means 135 the value of the corresponding attribute is unknown. */ 136 /* ALIGN and SIZE are the alignment and size of the MEM itself, 137 while EXPR can describe a larger underlying object, which might have a 138 stricter alignment; OFFSET is the offset of the MEM within that object. */ 139 typedef struct mem_attrs GTY(()) 140 { 141 HOST_WIDE_INT alias; /* Memory alias set. */ 142 tree expr; /* expr corresponding to MEM. */ 143 rtx offset; /* Offset from start of DECL, as CONST_INT. */ 144 rtx size; /* Size in bytes, as a CONST_INT. */ 145 unsigned int align; /* Alignment of MEM in bits. */ 146 } mem_attrs; 147 148 /* Structure used to describe the attributes of a REG in similar way as 149 mem_attrs does for MEM above. */ 150 151 typedef struct reg_attrs GTY(()) 152 { 153 tree decl; /* decl corresponding to REG. */ 154 HOST_WIDE_INT offset; /* Offset from start of DECL. */ 155 } reg_attrs; 156 157 /* Common union for an element of an rtx. */ 158 159 union rtunion_def 160 { 161 int rt_int; 162 unsigned int rt_uint; 163 const char *rt_str; 164 rtx rt_rtx; 165 rtvec rt_rtvec; 166 enum machine_mode rt_type; 167 addr_diff_vec_flags rt_addr_diff_vec_flags; 168 struct cselib_val_struct *rt_cselib; 169 struct bitmap_head_def *rt_bit; 170 tree rt_tree; 171 struct basic_block_def *rt_bb; 172 mem_attrs *rt_mem; 173 reg_attrs *rt_reg; 174 }; 175 typedef union rtunion_def rtunion; 176 177 /* RTL expression ("rtx"). */ 178 179 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"), 180 chain_prev ("RTX_PREV (&%h)"))) 181 { 182 /* The kind of expression this is. */ 183 ENUM_BITFIELD(rtx_code) code: 16; 184 185 /* The kind of value the expression has. */ 186 ENUM_BITFIELD(machine_mode) mode : 8; 187 188 /* 1 in a MEM if we should keep the alias set for this mem unchanged 189 when we access a component. 190 1 in a CALL_INSN if it is a sibling call. 191 1 in a SET that is for a return. 192 In a CODE_LABEL, part of the two-bit alternate entry field. */ 193 unsigned int jump : 1; 194 /* In a CODE_LABEL, part of the two-bit alternate entry field. 195 1 in a MEM if it cannot trap. */ 196 unsigned int call : 1; 197 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere. 198 1 in a SUBREG if it references an unsigned object whose mode has been 199 from a promoted to a wider mode. 200 1 in a SYMBOL_REF if it addresses something in the per-function 201 constants pool. 202 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call. 203 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */ 204 unsigned int unchanging : 1; 205 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile. 206 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE 207 if it has been deleted. 208 1 in a REG expression if corresponds to a variable declared by the user, 209 0 for an internally generated temporary. 210 1 in a SUBREG with a negative value. 211 1 in a LABEL_REF or in a REG_LABEL note for a non-local label. 212 In a SYMBOL_REF, this flag is used for machine-specific purposes. */ 213 unsigned int volatil : 1; 214 /* 1 in a MEM referring to a field of an aggregate. 215 0 if the MEM was a variable or the result of a * operator in C; 216 1 if it was the result of a . or -> operator (on a struct) in C. 217 1 in a REG if the register is used only in exit code a loop. 218 1 in a SUBREG expression if was generated from a variable with a 219 promoted mode. 220 1 in a CODE_LABEL if the label is used for nonlocal gotos 221 and must not be deleted even if its count is zero. 222 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled 223 together with the preceding insn. Valid only within sched. 224 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and 225 from the target of a branch. Valid from reorg until end of compilation; 226 cleared before used. */ 227 unsigned int in_struct : 1; 228 /* At the end of RTL generation, 1 if this rtx is used. This is used for 229 copying shared structure. See `unshare_all_rtl'. 230 In a REG, this is not needed for that purpose, and used instead 231 in `leaf_renumber_regs_insn'. 232 1 in a SYMBOL_REF, means that emit_library_call 233 has used it as the function. */ 234 unsigned int used : 1; 235 /* 1 in an INSN or a SET if this rtx is related to the call frame, 236 either changing how we compute the frame address or saving and 237 restoring registers in the prologue and epilogue. 238 1 in a REG or MEM if it is a pointer. 239 1 in a SYMBOL_REF if it addresses something in the per-function 240 constant string pool. */ 241 unsigned frame_related : 1; 242 /* 1 in a REG or PARALLEL that is the current function's return value. 243 1 in a MEM if it refers to a scalar. 244 1 in a SYMBOL_REF for a weak symbol. */ 245 unsigned return_val : 1; 246 247 /* The first element of the operands of this rtx. 248 The number of operands and their types are controlled 249 by the `code' field, according to rtl.def. */ 250 union u { 251 rtunion fld[1]; 252 HOST_WIDE_INT hwint[1]; 253 struct real_value rv; 254 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u; 255 }; 256 257 /* The size in bytes of an rtx header (code, mode and flags). */ 258 #define RTX_HDR_SIZE offsetof (struct rtx_def, u) 259 260 /* The size in bytes of an rtx with code CODE. */ 261 #define RTX_SIZE(CODE) rtx_size[CODE] 262 263 #define NULL_RTX (rtx) 0 264 265 /* The "next" and "previous" RTX, relative to this one. */ 266 267 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \ 268 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)])) 269 270 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed. 271 */ 272 #define RTX_PREV(X) ((INSN_P (X) \ 273 || NOTE_P (X) \ 274 || BARRIER_P (X) \ 275 || LABEL_P (X)) \ 276 && PREV_INSN (X) != NULL \ 277 && NEXT_INSN (PREV_INSN (X)) == X \ 278 ? PREV_INSN (X) : NULL) 279 280 /* Define macros to access the `code' field of the rtx. */ 281 282 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code) 283 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE)) 284 285 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode) 286 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE)) 287 288 /* RTL vector. These appear inside RTX's when there is a need 289 for a variable number of things. The principle use is inside 290 PARALLEL expressions. */ 291 292 struct rtvec_def GTY(()) { 293 int num_elem; /* number of elements */ 294 rtx GTY ((length ("%h.num_elem"))) elem[1]; 295 }; 296 297 #define NULL_RTVEC (rtvec) 0 298 299 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) 300 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM)) 301 302 /* Predicate yielding nonzero iff X is an rtx for a register. */ 303 #define REG_P(X) (GET_CODE (X) == REG) 304 305 /* Predicate yielding nonzero iff X is an rtx for a memory location. */ 306 #define MEM_P(X) (GET_CODE (X) == MEM) 307 308 /* Predicate yielding nonzero iff X is a label insn. */ 309 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL) 310 311 /* Predicate yielding nonzero iff X is a jump insn. */ 312 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN) 313 314 /* Predicate yielding nonzero iff X is a call insn. */ 315 #define CALL_P(X) (GET_CODE (X) == CALL_INSN) 316 317 /* Predicate yielding nonzero iff X is an insn that cannot jump. */ 318 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN) 319 320 /* Predicate yielding nonzero iff X is a real insn. */ 321 #define INSN_P(X) \ 322 (NONJUMP_INSN_P (X) || JUMP_P (X) || CALL_P (X)) 323 324 /* Predicate yielding nonzero iff X is a note insn. */ 325 #define NOTE_P(X) (GET_CODE (X) == NOTE) 326 327 /* Predicate yielding nonzero iff X is a barrier insn. */ 328 #define BARRIER_P(X) (GET_CODE (X) == BARRIER) 329 330 /* Predicate yielding nonzero iff X is a data for a jump table. */ 331 #define JUMP_TABLE_DATA_P(INSN) \ 332 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \ 333 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC)) 334 335 /* 1 if X is a unary operator. */ 336 337 #define UNARY_P(X) \ 338 (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY) 339 340 /* 1 if X is a binary operator. */ 341 342 #define BINARY_P(X) \ 343 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT) 344 345 /* 1 if X is an arithmetic operator. */ 346 347 #define ARITHMETIC_P(X) \ 348 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK) \ 349 == RTX_ARITHMETIC_RESULT) 350 351 /* 1 if X is an arithmetic operator. */ 352 353 #define COMMUTATIVE_ARITH_P(X) \ 354 (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH) 355 356 /* 1 if X is a commutative arithmetic operator or a comparison operator. 357 These two are sometimes selected together because it is possible to 358 swap the two operands. */ 359 360 #define SWAPPABLE_OPERANDS_P(X) \ 361 ((1 << GET_RTX_CLASS (GET_CODE (X))) \ 362 & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE) \ 363 | (1 << RTX_COMPARE))) 364 365 /* 1 if X is a non-commutative operator. */ 366 367 #define NON_COMMUTATIVE_P(X) \ 368 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \ 369 == RTX_NON_COMMUTATIVE_RESULT) 370 371 /* 1 if X is a commutative operator on integers. */ 372 373 #define COMMUTATIVE_P(X) \ 374 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK) \ 375 == RTX_COMMUTATIVE_RESULT) 376 377 /* 1 if X is a relational operator. */ 378 379 #define COMPARISON_P(X) \ 380 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT) 381 382 /* 1 if X is a constant value that is an integer. */ 383 384 #define CONSTANT_P(X) \ 385 (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ) 386 387 /* 1 if X can be used to represent an object. */ 388 #define OBJECT_P(X) \ 389 ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT) 390 391 /* General accessor macros for accessing the fields of an rtx. */ 392 393 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007) 394 /* The bit with a star outside the statement expr and an & inside is 395 so that N can be evaluated only once. */ 396 #define RTL_CHECK1(RTX, N, C1) __extension__ \ 397 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 398 const enum rtx_code _code = GET_CODE (_rtx); \ 399 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 400 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 401 __FUNCTION__); \ 402 if (GET_RTX_FORMAT(_code)[_n] != C1) \ 403 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \ 404 __FUNCTION__); \ 405 &_rtx->u.fld[_n]; })) 406 407 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \ 408 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 409 const enum rtx_code _code = GET_CODE (_rtx); \ 410 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 411 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 412 __FUNCTION__); \ 413 if (GET_RTX_FORMAT(_code)[_n] != C1 \ 414 && GET_RTX_FORMAT(_code)[_n] != C2) \ 415 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \ 416 __FUNCTION__); \ 417 &_rtx->u.fld[_n]; })) 418 419 #define RTL_CHECKC1(RTX, N, C) __extension__ \ 420 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 421 if (GET_CODE (_rtx) != (C)) \ 422 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \ 423 __FUNCTION__); \ 424 &_rtx->u.fld[_n]; })) 425 426 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \ 427 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 428 const enum rtx_code _code = GET_CODE (_rtx); \ 429 if (_code != (C1) && _code != (C2)) \ 430 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \ 431 __FUNCTION__); \ 432 &_rtx->u.fld[_n]; })) 433 434 #define RTVEC_ELT(RTVEC, I) __extension__ \ 435 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \ 436 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \ 437 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \ 438 __FUNCTION__); \ 439 &_rtvec->elem[_i]; })) 440 441 #define XWINT(RTX, N) __extension__ \ 442 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 443 const enum rtx_code _code = GET_CODE (_rtx); \ 444 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 445 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 446 __FUNCTION__); \ 447 if (GET_RTX_FORMAT(_code)[_n] != 'w') \ 448 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \ 449 __FUNCTION__); \ 450 &_rtx->u.hwint[_n]; })) 451 452 #define XCWINT(RTX, N, C) __extension__ \ 453 (*({ rtx const _rtx = (RTX); \ 454 if (GET_CODE (_rtx) != (C)) \ 455 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \ 456 __FUNCTION__); \ 457 &_rtx->u.hwint[N]; })) 458 459 #define XCMWINT(RTX, N, C, M) __extension__ \ 460 (*({ rtx const _rtx = (RTX); \ 461 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M)) \ 462 rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__, \ 463 __LINE__, __FUNCTION__); \ 464 &_rtx->u.hwint[N]; })) 465 466 #define XCNMPRV(RTX, C, M) __extension__ \ 467 ({ rtx const _rtx = (RTX); \ 468 if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M)) \ 469 rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__, \ 470 __LINE__, __FUNCTION__); \ 471 &_rtx->u.rv; }) 472 473 extern void rtl_check_failed_bounds (rtx, int, const char *, int, 474 const char *) 475 ATTRIBUTE_NORETURN; 476 extern void rtl_check_failed_type1 (rtx, int, int, const char *, int, 477 const char *) 478 ATTRIBUTE_NORETURN; 479 extern void rtl_check_failed_type2 (rtx, int, int, int, const char *, 480 int, const char *) 481 ATTRIBUTE_NORETURN; 482 extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *, 483 int, const char *) 484 ATTRIBUTE_NORETURN; 485 extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code, 486 const char *, int, const char *) 487 ATTRIBUTE_NORETURN; 488 extern void rtl_check_failed_code_mode (rtx, enum rtx_code, enum machine_mode, 489 bool, const char *, int, const char *) 490 ATTRIBUTE_NORETURN; 491 extern void rtvec_check_failed_bounds (rtvec, int, const char *, int, 492 const char *) 493 ATTRIBUTE_NORETURN; 494 495 #else /* not ENABLE_RTL_CHECKING */ 496 497 #define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N]) 498 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N]) 499 #define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N]) 500 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N]) 501 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I]) 502 #define XWINT(RTX, N) ((RTX)->u.hwint[N]) 503 #define XCWINT(RTX, N, C) ((RTX)->u.hwint[N]) 504 #define XCMWINT(RTX, N, C, M) ((RTX)->u.hwint[N]) 505 #define XCNMWINT(RTX, N, C, M) ((RTX)->u.hwint[N]) 506 #define XCNMPRV(RTX, C, M) (&(RTX)->u.rv) 507 508 #endif 509 510 /* General accessor macros for accessing the flags of an rtx. */ 511 512 /* Access an individual rtx flag, with no checking of any kind. */ 513 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG) 514 515 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007) 516 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \ 517 ({ rtx const _rtx = (RTX); \ 518 if (GET_CODE(_rtx) != C1) \ 519 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 520 __FUNCTION__); \ 521 _rtx; }) 522 523 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \ 524 ({ rtx const _rtx = (RTX); \ 525 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \ 526 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \ 527 __FUNCTION__); \ 528 _rtx; }) 529 530 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \ 531 ({ rtx const _rtx = (RTX); \ 532 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 533 && GET_CODE(_rtx) != C3) \ 534 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 535 __FUNCTION__); \ 536 _rtx; }) 537 538 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \ 539 ({ rtx const _rtx = (RTX); \ 540 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 541 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \ 542 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 543 __FUNCTION__); \ 544 _rtx; }) 545 546 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \ 547 ({ rtx const _rtx = (RTX); \ 548 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 549 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 550 && GET_CODE(_rtx) != C5) \ 551 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 552 __FUNCTION__); \ 553 _rtx; }) 554 555 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \ 556 __extension__ \ 557 ({ rtx const _rtx = (RTX); \ 558 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 559 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 560 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \ 561 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \ 562 __FUNCTION__); \ 563 _rtx; }) 564 565 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \ 566 __extension__ \ 567 ({ rtx const _rtx = (RTX); \ 568 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 569 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 570 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 571 && GET_CODE(_rtx) != C7) \ 572 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 573 __FUNCTION__); \ 574 _rtx; }) 575 576 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \ 577 __extension__ \ 578 ({ rtx const _rtx = (RTX); \ 579 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 580 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 581 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 582 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \ 583 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 584 __FUNCTION__); \ 585 _rtx; }) 586 587 extern void rtl_check_failed_flag (const char *, rtx, const char *, 588 int, const char *) 589 ATTRIBUTE_NORETURN 590 ; 591 592 #else /* not ENABLE_RTL_FLAG_CHECKING */ 593 594 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX) 595 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX) 596 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX) 597 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX) 598 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX) 599 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX) 600 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX) 601 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX) 602 #endif 603 604 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int) 605 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rt_str) 606 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx) 607 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec) 608 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rt_type) 609 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit) 610 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rt_tree) 611 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').rt_bb) 612 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rt_str) 613 614 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M) 615 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N)) 616 617 /* These are like XINT, etc. except that they expect a '0' field instead 618 of the normal type code. */ 619 620 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_int) 621 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_uint) 622 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_str) 623 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtx) 624 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_rtvec) 625 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_type) 626 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bit) 627 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_tree) 628 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_bb) 629 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags) 630 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib) 631 #define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rt_mem) 632 #define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rt_reg) 633 634 /* Access a '0' field with any type. */ 635 #define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0') 636 637 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_int) 638 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_uint) 639 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_str) 640 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtx) 641 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_rtvec) 642 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_type) 643 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bit) 644 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_tree) 645 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_bb) 646 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib) 647 648 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M) 649 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C)) 650 651 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx) 652 653 /* ACCESS MACROS for particular fields of insns. */ 654 655 /* Holds a unique number for each insn. 656 These are not necessarily sequentially increasing. */ 657 #define INSN_UID(INSN) XINT (INSN, 0) 658 659 /* Chain insns together in sequence. */ 660 #define PREV_INSN(INSN) XEXP (INSN, 1) 661 #define NEXT_INSN(INSN) XEXP (INSN, 2) 662 663 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3) 664 #define INSN_LOCATOR(INSN) XINT (INSN, 4) 665 /* The body of an insn. */ 666 #define PATTERN(INSN) XEXP (INSN, 5) 667 668 /* Code number of instruction, from when it was recognized. 669 -1 means this instruction has not been recognized yet. */ 670 #define INSN_CODE(INSN) XINT (INSN, 6) 671 672 /* Set up in flow.c; empty before then. 673 Holds a chain of INSN_LIST rtx's whose first operands point at 674 previous insns with direct data-flow connections to this one. 675 That means that those insns set variables whose next use is in this insn. 676 They are always in the same basic block as this insn. */ 677 #define LOG_LINKS(INSN) XEXP(INSN, 7) 678 679 #define RTX_FRAME_RELATED_P(RTX) \ 680 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \ 681 JUMP_INSN, BARRIER, SET)->frame_related) 682 683 /* 1 if RTX is an insn that has been deleted. */ 684 #define INSN_DELETED_P(RTX) \ 685 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \ 686 CODE_LABEL, BARRIER, NOTE)->volatil) 687 688 /* 1 if RTX is a call to a const or pure function. */ 689 #define CONST_OR_PURE_CALL_P(RTX) \ 690 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \ 691 EXPR_LIST)->unchanging) 692 693 /* 1 if RTX is a call_insn for a sibling call. */ 694 #define SIBLING_CALL_P(RTX) \ 695 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump) 696 697 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */ 698 #define INSN_ANNULLED_BRANCH_P(RTX) \ 699 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging) 700 701 /* 1 if RTX is an insn in a delay slot and is from the target of the branch. 702 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be 703 executed if the branch is taken. For annulled branches with this bit 704 clear, the insn should be executed only if the branch is not taken. */ 705 #define INSN_FROM_TARGET_P(RTX) \ 706 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct) 707 708 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening. 709 See the comments for ADDR_DIFF_VEC in rtl.def. */ 710 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4) 711 712 /* In a VALUE, the value cselib has assigned to RTX. 713 This is a "struct cselib_val_struct", see cselib.h. */ 714 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0) 715 716 /* Holds a list of notes on what this insn does to various REGs. 717 It is a chain of EXPR_LIST rtx's, where the second operand is the 718 chain pointer and the first operand is the REG being described. 719 The mode field of the EXPR_LIST contains not a real machine mode 720 but a value from enum reg_note. */ 721 #define REG_NOTES(INSN) XEXP(INSN, 8) 722 723 enum reg_note 724 { 725 #define DEF_REG_NOTE(NAME) NAME, 726 #include "reg-notes.def" 727 #undef DEF_REG_NOTE 728 REG_NOTE_MAX 729 }; 730 731 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ 732 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) 733 #define PUT_REG_NOTE_KIND(LINK, KIND) \ 734 PUT_MODE (LINK, (enum machine_mode) (KIND)) 735 736 /* Names for REG_NOTE's in EXPR_LIST insn's. */ 737 738 extern const char * const reg_note_name[]; 739 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)]) 740 741 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of 742 USE and CLOBBER expressions. 743 USE expressions list the registers filled with arguments that 744 are passed to the function. 745 CLOBBER expressions document the registers explicitly clobbered 746 by this CALL_INSN. 747 Pseudo registers can not be mentioned in this list. */ 748 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9) 749 750 /* The label-number of a code-label. The assembler label 751 is made from `L' and the label-number printed in decimal. 752 Label numbers are unique in a compilation. */ 753 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6) 754 755 /* In a NOTE that is a line number, this is a string for the file name that the 756 line is in. We use the same field to record block numbers temporarily in 757 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts 758 between ints and pointers if we use a different macro for the block number.) 759 */ 760 761 /* Opaque data. */ 762 #define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE) 763 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE) 764 #ifdef USE_MAPPED_LOCATION 765 #define NOTE_SOURCE_LOCATION(INSN) XCUINT (INSN, 5, NOTE) 766 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \ 767 (XLOC) = expand_location (NOTE_SOURCE_LOCATION (INSN)) 768 #define SET_INSN_DELETED(INSN) \ 769 (PUT_CODE (INSN, NOTE), NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED) 770 #else 771 #define NOTE_EXPANDED_LOCATION(XLOC, INSN) \ 772 ((XLOC).file = NOTE_SOURCE_FILE (INSN), \ 773 (XLOC).line = NOTE_LINE_NUMBER (INSN)) 774 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE) 775 #define SET_INSN_DELETED(INSN) \ 776 (PUT_CODE (INSN, NOTE), NOTE_SOURCE_FILE (INSN) = 0, \ 777 NOTE_LINE_NUMBER (INSN) = NOTE_INSN_DELETED) 778 #endif 779 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE) 780 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE) 781 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE) 782 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE) 783 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE) 784 785 /* In a NOTE that is a line number, this is the line number. 786 Other kinds of NOTEs are identified by negative numbers here. */ 787 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE) 788 789 /* Nonzero if INSN is a note marking the beginning of a basic block. */ 790 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \ 791 (GET_CODE (INSN) == NOTE \ 792 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK) 793 794 /* Variable declaration and the location of a variable. */ 795 #define NOTE_VAR_LOCATION_DECL(INSN) (XCTREE (XCEXP (INSN, 4, NOTE), \ 796 0, VAR_LOCATION)) 797 #define NOTE_VAR_LOCATION_LOC(INSN) (XCEXP (XCEXP (INSN, 4, NOTE), \ 798 1, VAR_LOCATION)) 799 800 /* Codes that appear in the NOTE_LINE_NUMBER field for kinds of notes 801 that are not line numbers. These codes are all negative. 802 803 Notice that we do not try to use zero here for any of 804 the special note codes because sometimes the source line 805 actually can be zero! This happens (for example) when we 806 are generating code for the per-translation-unit constructor 807 and destructor routines for some C++ translation unit. */ 808 809 enum insn_note 810 { 811 /* Keep all of these numbers negative. Adjust as needed. */ 812 NOTE_INSN_BIAS = -100, 813 814 #define DEF_INSN_NOTE(NAME) NAME, 815 #include "insn-notes.def" 816 #undef DEF_INSN_NOTE 817 818 NOTE_INSN_MAX 819 }; 820 821 /* Names for NOTE insn's other than line numbers. */ 822 823 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS]; 824 #define GET_NOTE_INSN_NAME(NOTE_CODE) \ 825 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS]) 826 827 /* The name of a label, in case it corresponds to an explicit label 828 in the input source code. */ 829 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL) 830 831 /* In jump.c, each label contains a count of the number 832 of LABEL_REFs that point at it, so unused labels can be deleted. */ 833 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL) 834 835 /* Labels carry a two-bit field composed of the ->jump and ->call 836 bits. This field indicates whether the label is an alternate 837 entry point, and if so, what kind. */ 838 enum label_kind 839 { 840 LABEL_NORMAL = 0, /* ordinary label */ 841 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */ 842 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */ 843 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */ 844 }; 845 846 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007) 847 848 /* Retrieve the kind of LABEL. */ 849 #define LABEL_KIND(LABEL) __extension__ \ 850 ({ rtx const _label = (LABEL); \ 851 if (GET_CODE (_label) != CODE_LABEL) \ 852 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \ 853 __FUNCTION__); \ 854 (enum label_kind) ((_label->jump << 1) | _label->call); }) 855 856 /* Set the kind of LABEL. */ 857 #define SET_LABEL_KIND(LABEL, KIND) do { \ 858 rtx _label = (LABEL); \ 859 unsigned int _kind = (KIND); \ 860 if (GET_CODE (_label) != CODE_LABEL) \ 861 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \ 862 __FUNCTION__); \ 863 _label->jump = ((_kind >> 1) & 1); \ 864 _label->call = (_kind & 1); \ 865 } while (0) 866 867 #else 868 869 /* Retrieve the kind of LABEL. */ 870 #define LABEL_KIND(LABEL) \ 871 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call)) 872 873 /* Set the kind of LABEL. */ 874 #define SET_LABEL_KIND(LABEL, KIND) do { \ 875 rtx _label = (LABEL); \ 876 unsigned int _kind = (KIND); \ 877 _label->jump = ((_kind >> 1) & 1); \ 878 _label->call = (_kind & 1); \ 879 } while (0) 880 881 #endif /* rtl flag checking */ 882 883 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL) 884 885 /* In jump.c, each JUMP_INSN can point to a label that it can jump to, 886 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can 887 be decremented and possibly the label can be deleted. */ 888 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN) 889 890 /* Once basic blocks are found in flow.c, 891 each CODE_LABEL starts a chain that goes through 892 all the LABEL_REFs that jump to that label. 893 The chain eventually winds up at the CODE_LABEL: it is circular. */ 894 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL) 895 896 /* This is the field in the LABEL_REF through which the circular chain 897 of references to a particular label is linked. 898 FIXME: This chain is used in loop.c and in the SH backend. 899 Since loop.c is about to go away, it could be a win to replace 900 the uses of this in the SH backend with something else. */ 901 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF) 902 903 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds 904 the number the register originally had; for a pseudo register turned into 905 a hard reg this will hold the old pseudo register number. */ 906 907 #define REGNO(RTX) XCUINT (RTX, 0, REG) 908 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1) 909 910 /* 1 if RTX is a reg or parallel that is the current function's return 911 value. */ 912 #define REG_FUNCTION_VALUE_P(RTX) \ 913 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val) 914 915 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */ 916 #define REG_USERVAR_P(RTX) \ 917 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil) 918 919 /* 1 if RTX is a reg that holds a pointer value. */ 920 #define REG_POINTER(RTX) \ 921 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related) 922 923 /* 1 if RTX is a mem that holds a pointer value. */ 924 #define MEM_POINTER(RTX) \ 925 (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related) 926 927 /* 1 if the given register REG corresponds to a hard register. */ 928 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG))) 929 930 /* 1 if the given register number REG_NO corresponds to a hard register. */ 931 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER) 932 933 /* For a CONST_INT rtx, INTVAL extracts the integer. */ 934 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT) 935 936 /* For a CONST_DOUBLE: 937 For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the 938 low-order word and ..._HIGH the high-order. 939 For a float, there is a REAL_VALUE_TYPE structure, and 940 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */ 941 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode) 942 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode) 943 #define CONST_DOUBLE_REAL_VALUE(r) \ 944 ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode)) 945 946 /* For a CONST_VECTOR, return element #n. */ 947 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR) 948 949 /* For a CONST_VECTOR, return the number of elements in a vector. */ 950 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR) 951 952 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. 953 SUBREG_BYTE extracts the byte-number. */ 954 955 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG) 956 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG) 957 958 /* in rtlanal.c */ 959 /* Return the right cost to give to an operation 960 to make the cost of the corresponding register-to-register instruction 961 N times that of a fast register-to-register instruction. */ 962 #define COSTS_N_INSNS(N) ((N) * 4) 963 964 /* Maximum cost of an rtl expression. This value has the special meaning 965 not to use an rtx with this cost under any circumstances. */ 966 #define MAX_COST INT_MAX 967 968 extern void init_rtlanal (void); 969 extern int rtx_cost (rtx, enum rtx_code); 970 extern int address_cost (rtx, enum machine_mode); 971 extern unsigned int subreg_lsb (rtx); 972 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode, 973 unsigned int); 974 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode, 975 unsigned int, enum machine_mode); 976 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode, 977 unsigned int, enum machine_mode); 978 extern unsigned int subreg_regno (rtx); 979 extern unsigned HOST_WIDE_INT nonzero_bits (rtx, enum machine_mode); 980 extern unsigned int num_sign_bit_copies (rtx, enum machine_mode); 981 982 983 /* 1 if RTX is a subreg containing a reg that is already known to be 984 sign- or zero-extended from the mode of the subreg to the mode of 985 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the 986 extension. 987 988 When used as a LHS, is means that this extension must be done 989 when assigning to SUBREG_REG. */ 990 991 #define SUBREG_PROMOTED_VAR_P(RTX) \ 992 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct) 993 994 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \ 995 do { \ 996 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \ 997 if ((VAL) < 0) \ 998 _rtx->volatil = 1; \ 999 else { \ 1000 _rtx->volatil = 0; \ 1001 _rtx->unchanging = (VAL); \ 1002 } \ 1003 } while (0) 1004 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \ 1005 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \ 1006 ? -1 : (RTX)->unchanging) 1007 1008 /* Access various components of an ASM_OPERANDS rtx. */ 1009 1010 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS) 1011 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS) 1012 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS) 1013 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS) 1014 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS) 1015 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS) 1016 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS) 1017 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \ 1018 XCVECEXP (RTX, 4, N, ASM_OPERANDS) 1019 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \ 1020 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0) 1021 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \ 1022 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS)) 1023 #ifdef USE_MAPPED_LOCATION 1024 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 5, ASM_OPERANDS) 1025 #else 1026 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS) 1027 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS) 1028 #endif 1029 1030 /* 1 if RTX is a mem that is statically allocated in read-only memory. */ 1031 #define MEM_READONLY_P(RTX) \ 1032 (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging) 1033 1034 /* 1 if RTX is a mem and we should keep the alias set for this mem 1035 unchanged when we access a component. Set to 1, or example, when we 1036 are already in a non-addressable component of an aggregate. */ 1037 #define MEM_KEEP_ALIAS_SET_P(RTX) \ 1038 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump) 1039 1040 /* 1 if RTX is a mem or asm_operand for a volatile reference. */ 1041 #define MEM_VOLATILE_P(RTX) \ 1042 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \ 1043 ASM_INPUT)->volatil) 1044 1045 /* 1 if RTX is a mem that refers to an aggregate, either to the 1046 aggregate itself or to a field of the aggregate. If zero, RTX may 1047 or may not be such a reference. */ 1048 #define MEM_IN_STRUCT_P(RTX) \ 1049 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct) 1050 1051 /* 1 if RTX is a MEM that refers to a scalar. If zero, RTX may or may 1052 not refer to a scalar. */ 1053 #define MEM_SCALAR_P(RTX) \ 1054 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val) 1055 1056 /* 1 if RTX is a mem that cannot trap. */ 1057 #define MEM_NOTRAP_P(RTX) \ 1058 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call) 1059 1060 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in 1061 RTX. Otherwise, vice versa. Use this macro only when you are 1062 *sure* that you know that the MEM is in a structure, or is a 1063 scalar. VAL is evaluated only once. */ 1064 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \ 1065 do { \ 1066 if (VAL) \ 1067 { \ 1068 MEM_IN_STRUCT_P (RTX) = 1; \ 1069 MEM_SCALAR_P (RTX) = 0; \ 1070 } \ 1071 else \ 1072 { \ 1073 MEM_IN_STRUCT_P (RTX) = 0; \ 1074 MEM_SCALAR_P (RTX) = 1; \ 1075 } \ 1076 } while (0) 1077 1078 /* The memory attribute block. We provide access macros for each value 1079 in the block and provide defaults if none specified. */ 1080 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1) 1081 1082 /* The register attribute block. We provide access macros for each value 1083 in the block and provide defaults if none specified. */ 1084 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2) 1085 1086 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias 1087 set, and may alias anything. Otherwise, the MEM can only alias 1088 MEMs in a conflicting alias set. This value is set in a 1089 language-dependent manner in the front-end, and should not be 1090 altered in the back-end. These set numbers are tested with 1091 alias_sets_conflict_p. */ 1092 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias) 1093 1094 /* For a MEM rtx, the decl it is known to refer to, if it is known to 1095 refer to part of a DECL. It may also be a COMPONENT_REF. */ 1096 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr) 1097 1098 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a 1099 RTX that is always a CONST_INT. */ 1100 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset) 1101 1102 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that 1103 is always a CONST_INT. */ 1104 #define MEM_SIZE(RTX) \ 1105 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \ 1106 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \ 1107 : 0) 1108 1109 /* For a MEM rtx, the alignment in bits. We can use the alignment of the 1110 mode as a default when STRICT_ALIGNMENT, but not if not. */ 1111 #define MEM_ALIGN(RTX) \ 1112 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \ 1113 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \ 1114 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT)) 1115 1116 /* For a REG rtx, the decl it is known to refer to, if it is known to 1117 refer to part of a DECL. */ 1118 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl) 1119 1120 /* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a 1121 RTX that is always a CONST_INT. */ 1122 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset) 1123 1124 /* Copy the attributes that apply to memory locations from RHS to LHS. */ 1125 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \ 1126 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \ 1127 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \ 1128 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \ 1129 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \ 1130 MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \ 1131 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \ 1132 MEM_ATTRS (LHS) = MEM_ATTRS (RHS)) 1133 1134 /* 1 if RTX is a label_ref to a label outside the loop containing the 1135 reference. */ 1136 #define LABEL_OUTSIDE_LOOP_P(RTX) \ 1137 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct) 1138 1139 /* 1 if RTX is a label_ref for a nonlocal label. */ 1140 /* Likewise in an expr_list for a reg_label note. */ 1141 #define LABEL_REF_NONLOCAL_P(RTX) \ 1142 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \ 1143 REG_LABEL)->volatil) 1144 1145 /* 1 if RTX is a code_label that should always be considered to be needed. */ 1146 #define LABEL_PRESERVE_P(RTX) \ 1147 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct) 1148 1149 /* During sched, 1 if RTX is an insn that must be scheduled together 1150 with the preceding insn. */ 1151 #define SCHED_GROUP_P(RTX) \ 1152 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \ 1153 )->in_struct) 1154 1155 /* For a SET rtx, SET_DEST is the place that is set 1156 and SET_SRC is the value it is set to. */ 1157 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER) 1158 #define SET_SRC(RTX) XCEXP(RTX, 1, SET) 1159 #define SET_IS_RETURN_P(RTX) \ 1160 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump) 1161 1162 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ 1163 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF) 1164 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF) 1165 1166 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base 1167 conditionally executing the code on, COND_EXEC_CODE is the code 1168 to execute if the condition is true. */ 1169 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC) 1170 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC) 1171 1172 /* 1 if RTX is a symbol_ref that addresses this function's rtl 1173 constants pool. */ 1174 #define CONSTANT_POOL_ADDRESS_P(RTX) \ 1175 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging) 1176 1177 /* 1 if RTX is a symbol_ref that addresses a value in the file's 1178 tree constant pool. This information is private to varasm.c. */ 1179 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \ 1180 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \ 1181 (RTX), SYMBOL_REF)->frame_related) 1182 1183 /* Used if RTX is a symbol_ref, for machine-specific purposes. */ 1184 #define SYMBOL_REF_FLAG(RTX) \ 1185 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil) 1186 1187 /* 1 if RTX is a symbol_ref that has been the library function in 1188 emit_library_call. */ 1189 #define SYMBOL_REF_USED(RTX) \ 1190 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used) 1191 1192 /* 1 if RTX is a symbol_ref for a weak symbol. */ 1193 #define SYMBOL_REF_WEAK(RTX) \ 1194 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val) 1195 1196 /* The tree (decl or constant) associated with the symbol, or null. */ 1197 #define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2) 1198 1199 /* A set of flags on a symbol_ref that are, in some respects, redundant with 1200 information derivable from the tree decl associated with this symbol. 1201 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a 1202 decl. In some cases this is a bug. But beyond that, it's nice to cache 1203 this information to avoid recomputing it. Finally, this allows space for 1204 the target to store more than one bit of information, as with 1205 SYMBOL_REF_FLAG. */ 1206 #define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1) 1207 1208 /* These flags are common enough to be defined for all targets. They 1209 are computed by the default version of targetm.encode_section_info. */ 1210 1211 /* Set if this symbol is a function. */ 1212 #define SYMBOL_FLAG_FUNCTION (1 << 0) 1213 #define SYMBOL_REF_FUNCTION_P(RTX) \ 1214 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0) 1215 /* Set if targetm.binds_local_p is true. */ 1216 #define SYMBOL_FLAG_LOCAL (1 << 1) 1217 #define SYMBOL_REF_LOCAL_P(RTX) \ 1218 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0) 1219 /* Set if targetm.in_small_data_p is true. */ 1220 #define SYMBOL_FLAG_SMALL (1 << 2) 1221 #define SYMBOL_REF_SMALL_P(RTX) \ 1222 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0) 1223 /* The three-bit field at [5:3] is true for TLS variables; use 1224 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */ 1225 #define SYMBOL_FLAG_TLS_SHIFT 3 1226 #define SYMBOL_REF_TLS_MODEL(RTX) \ 1227 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7)) 1228 /* Set if this symbol is not defined in this translation unit. */ 1229 #define SYMBOL_FLAG_EXTERNAL (1 << 6) 1230 #define SYMBOL_REF_EXTERNAL_P(RTX) \ 1231 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0) 1232 1233 /* Subsequent bits are available for the target to use. */ 1234 #define SYMBOL_FLAG_MACH_DEP_SHIFT 7 1235 #define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT) 1236 1237 /* Define a macro to look for REG_INC notes, 1238 but save time on machines where they never exist. */ 1239 1240 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1241 #define FIND_REG_INC_NOTE(INSN, REG) \ 1242 ((REG) != NULL_RTX && REG_P ((REG)) \ 1243 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \ 1244 : find_reg_note ((INSN), REG_INC, (REG))) 1245 #else 1246 #define FIND_REG_INC_NOTE(INSN, REG) 0 1247 #endif 1248 1249 /* Indicate whether the machine has any sort of auto increment addressing. 1250 If not, we can avoid checking for REG_INC notes. */ 1251 1252 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1253 #define AUTO_INC_DEC 1254 #endif 1255 1256 #ifndef HAVE_PRE_INCREMENT 1257 #define HAVE_PRE_INCREMENT 0 1258 #endif 1259 1260 #ifndef HAVE_PRE_DECREMENT 1261 #define HAVE_PRE_DECREMENT 0 1262 #endif 1263 1264 #ifndef HAVE_POST_INCREMENT 1265 #define HAVE_POST_INCREMENT 0 1266 #endif 1267 1268 #ifndef HAVE_POST_DECREMENT 1269 #define HAVE_POST_DECREMENT 0 1270 #endif 1271 1272 #ifndef HAVE_POST_MODIFY_DISP 1273 #define HAVE_POST_MODIFY_DISP 0 1274 #endif 1275 1276 #ifndef HAVE_POST_MODIFY_REG 1277 #define HAVE_POST_MODIFY_REG 0 1278 #endif 1279 1280 #ifndef HAVE_PRE_MODIFY_DISP 1281 #define HAVE_PRE_MODIFY_DISP 0 1282 #endif 1283 1284 #ifndef HAVE_PRE_MODIFY_REG 1285 #define HAVE_PRE_MODIFY_REG 0 1286 #endif 1287 1288 1289 /* Some architectures do not have complete pre/post increment/decrement 1290 instruction sets, or only move some modes efficiently. These macros 1291 allow us to tune autoincrement generation. */ 1292 1293 #ifndef USE_LOAD_POST_INCREMENT 1294 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1295 #endif 1296 1297 #ifndef USE_LOAD_POST_DECREMENT 1298 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1299 #endif 1300 1301 #ifndef USE_LOAD_PRE_INCREMENT 1302 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1303 #endif 1304 1305 #ifndef USE_LOAD_PRE_DECREMENT 1306 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1307 #endif 1308 1309 #ifndef USE_STORE_POST_INCREMENT 1310 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1311 #endif 1312 1313 #ifndef USE_STORE_POST_DECREMENT 1314 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1315 #endif 1316 1317 #ifndef USE_STORE_PRE_INCREMENT 1318 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1319 #endif 1320 1321 #ifndef USE_STORE_PRE_DECREMENT 1322 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1323 #endif 1324 1325 /* Nonzero when we are generating CONCATs. */ 1326 extern int generating_concat_p; 1327 1328 /* Nonzero when we are expanding trees to RTL. */ 1329 extern int currently_expanding_to_rtl; 1330 1331 /* Generally useful functions. */ 1332 1333 /* In expmed.c */ 1334 extern int ceil_log2 (unsigned HOST_WIDE_INT); 1335 1336 /* In builtins.c */ 1337 extern rtx expand_builtin_expect_jump (tree, rtx, rtx); 1338 1339 /* In explow.c */ 1340 extern void set_stack_check_libfunc (rtx); 1341 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode); 1342 extern rtx plus_constant (rtx, HOST_WIDE_INT); 1343 1344 /* In emit-rtl.c */ 1345 extern rtvec gen_rtvec (int, ...); 1346 extern rtx copy_insn_1 (rtx); 1347 extern rtx copy_insn (rtx); 1348 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode); 1349 extern rtx emit_copy_of_insn_after (rtx, rtx); 1350 extern void set_reg_attrs_from_mem (rtx, rtx); 1351 extern void set_mem_attrs_from_reg (rtx, rtx); 1352 extern void set_reg_attrs_for_parm (rtx, rtx); 1353 extern int mem_expr_equal_p (tree, tree); 1354 1355 /* In rtl.c */ 1356 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL); 1357 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO) 1358 1359 extern rtvec rtvec_alloc (int); 1360 extern rtx copy_rtx (rtx); 1361 extern void dump_rtx_statistics (void); 1362 1363 /* In emit-rtl.c */ 1364 extern rtx copy_rtx_if_shared (rtx); 1365 1366 /* In rtl.c */ 1367 extern rtx shallow_copy_rtx_stat (rtx MEM_STAT_DECL); 1368 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO) 1369 extern int rtx_equal_p (rtx, rtx); 1370 1371 /* In emit-rtl.c */ 1372 extern rtvec gen_rtvec_v (int, rtx *); 1373 extern rtx gen_reg_rtx (enum machine_mode); 1374 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int); 1375 extern rtx gen_label_rtx (void); 1376 extern rtx gen_lowpart_common (enum machine_mode, rtx); 1377 1378 /* In cse.c */ 1379 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx); 1380 1381 /* In emit-rtl.c */ 1382 extern rtx gen_highpart (enum machine_mode, rtx); 1383 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx); 1384 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode); 1385 1386 /* In emit-rtl.c */ 1387 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode); 1388 extern int subreg_lowpart_p (rtx); 1389 extern unsigned int subreg_lowpart_offset (enum machine_mode, 1390 enum machine_mode); 1391 extern unsigned int subreg_highpart_offset (enum machine_mode, 1392 enum machine_mode); 1393 extern rtx make_safe_from (rtx, rtx); 1394 extern rtx convert_memory_address (enum machine_mode, rtx); 1395 extern rtx get_insns (void); 1396 extern const char *get_insn_name (int); 1397 extern rtx get_last_insn (void); 1398 extern rtx get_last_insn_anywhere (void); 1399 extern rtx get_first_nonnote_insn (void); 1400 extern rtx get_last_nonnote_insn (void); 1401 extern void start_sequence (void); 1402 extern void push_to_sequence (rtx); 1403 extern void end_sequence (void); 1404 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT, 1405 enum machine_mode); 1406 1407 /* In loop-iv.c */ 1408 1409 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode); 1410 1411 /* In varasm.c */ 1412 extern rtx force_const_mem (enum machine_mode, rtx); 1413 1414 /* In varasm.c */ 1415 1416 struct function; 1417 extern rtx get_pool_constant (rtx); 1418 extern rtx get_pool_constant_mark (rtx, bool *); 1419 extern enum machine_mode get_pool_mode (rtx); 1420 extern rtx get_pool_constant_for_function (struct function *, rtx); 1421 extern rtx simplify_subtraction (rtx); 1422 1423 /* In function.c */ 1424 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int); 1425 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int); 1426 extern rtx assign_stack_temp_for_type (enum machine_mode, 1427 HOST_WIDE_INT, int, tree); 1428 extern rtx assign_temp (tree, int, int, int); 1429 1430 /* In emit-rtl.c */ 1431 extern rtx emit_insn_before (rtx, rtx); 1432 extern rtx emit_insn_before_noloc (rtx, rtx); 1433 extern rtx emit_insn_before_setloc (rtx, rtx, int); 1434 extern rtx emit_jump_insn_before (rtx, rtx); 1435 extern rtx emit_jump_insn_before_noloc (rtx, rtx); 1436 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int); 1437 extern rtx emit_call_insn_before (rtx, rtx); 1438 extern rtx emit_call_insn_before_noloc (rtx, rtx); 1439 extern rtx emit_call_insn_before_setloc (rtx, rtx, int); 1440 extern rtx emit_barrier_before (rtx); 1441 extern rtx emit_label_before (rtx, rtx); 1442 extern rtx emit_note_before (int, rtx); 1443 extern rtx emit_insn_after (rtx, rtx); 1444 extern rtx emit_insn_after_noloc (rtx, rtx); 1445 extern rtx emit_insn_after_setloc (rtx, rtx, int); 1446 extern rtx emit_jump_insn_after (rtx, rtx); 1447 extern rtx emit_jump_insn_after_noloc (rtx, rtx); 1448 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int); 1449 extern rtx emit_call_insn_after (rtx, rtx); 1450 extern rtx emit_call_insn_after_noloc (rtx, rtx); 1451 extern rtx emit_call_insn_after_setloc (rtx, rtx, int); 1452 extern rtx emit_barrier_after (rtx); 1453 extern rtx emit_label_after (rtx, rtx); 1454 extern rtx emit_note_after (int, rtx); 1455 extern rtx emit_note_copy_after (rtx, rtx); 1456 extern rtx emit_insn (rtx); 1457 extern rtx emit_jump_insn (rtx); 1458 extern rtx emit_call_insn (rtx); 1459 extern rtx emit_label (rtx); 1460 extern rtx emit_barrier (void); 1461 extern rtx emit_note (int); 1462 extern rtx emit_note_copy (rtx); 1463 extern rtx emit_line_note (location_t); 1464 extern rtx make_insn_raw (rtx); 1465 extern void add_function_usage_to (rtx, rtx); 1466 extern rtx last_call_insn (void); 1467 extern rtx previous_insn (rtx); 1468 extern rtx next_insn (rtx); 1469 extern rtx prev_nonnote_insn (rtx); 1470 extern rtx next_nonnote_insn (rtx); 1471 extern rtx prev_real_insn (rtx); 1472 extern rtx next_real_insn (rtx); 1473 extern rtx prev_active_insn (rtx); 1474 extern rtx next_active_insn (rtx); 1475 extern int active_insn_p (rtx); 1476 extern rtx prev_label (rtx); 1477 extern rtx next_label (rtx); 1478 extern rtx skip_consecutive_labels (rtx); 1479 extern rtx next_cc0_user (rtx); 1480 extern rtx prev_cc0_setter (rtx); 1481 1482 /* In cfglayout.c */ 1483 extern int insn_line (rtx); 1484 extern const char * insn_file (rtx); 1485 extern int locator_line (int); 1486 extern const char * locator_file (int); 1487 extern int prologue_locator, epilogue_locator; 1488 1489 /* In jump.c */ 1490 extern enum rtx_code reverse_condition (enum rtx_code); 1491 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code); 1492 extern enum rtx_code swap_condition (enum rtx_code); 1493 extern enum rtx_code unsigned_condition (enum rtx_code); 1494 extern enum rtx_code signed_condition (enum rtx_code); 1495 extern void mark_jump_label (rtx, rtx, int); 1496 extern void cleanup_barriers (void); 1497 1498 /* In jump.c */ 1499 extern bool squeeze_notes (rtx *, rtx *); 1500 extern rtx delete_related_insns (rtx); 1501 extern void delete_jump (rtx); 1502 extern rtx get_label_before (rtx); 1503 extern rtx get_label_after (rtx); 1504 extern rtx follow_jumps (rtx); 1505 1506 /* In recog.c */ 1507 extern rtx *find_constant_term_loc (rtx *); 1508 1509 /* In emit-rtl.c */ 1510 extern rtx try_split (rtx, rtx, int); 1511 extern int split_branch_probability; 1512 1513 /* In unknown file */ 1514 extern rtx split_insns (rtx, rtx); 1515 1516 /* In simplify-rtx.c */ 1517 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode, 1518 rtx, enum machine_mode); 1519 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx, 1520 enum machine_mode); 1521 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode, 1522 rtx, rtx); 1523 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx, 1524 rtx); 1525 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode, 1526 enum machine_mode, rtx, rtx, rtx); 1527 extern rtx simplify_const_relational_operation (enum rtx_code, 1528 enum machine_mode, rtx, rtx); 1529 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode, 1530 enum machine_mode, rtx, rtx); 1531 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx); 1532 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx, 1533 enum machine_mode); 1534 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode, 1535 enum machine_mode, rtx, rtx, rtx); 1536 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode, 1537 enum machine_mode, rtx, rtx); 1538 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode, 1539 unsigned int); 1540 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode, 1541 unsigned int); 1542 extern rtx simplify_replace_rtx (rtx, rtx, rtx); 1543 extern rtx simplify_rtx (rtx); 1544 extern rtx avoid_constant_pool_reference (rtx); 1545 extern bool constant_pool_reference_p (rtx x); 1546 extern bool mode_signbit_p (enum machine_mode, rtx); 1547 1548 /* In regclass.c */ 1549 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int, 1550 bool); 1551 1552 /* In emit-rtl.c */ 1553 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx); 1554 1555 /* Functions in rtlanal.c */ 1556 1557 /* Single set is implemented as macro for performance reasons. */ 1558 #define single_set(I) (INSN_P (I) \ 1559 ? (GET_CODE (PATTERN (I)) == SET \ 1560 ? PATTERN (I) : single_set_1 (I)) \ 1561 : NULL_RTX) 1562 #define single_set_1(I) single_set_2 (I, PATTERN (I)) 1563 1564 /* Structure used for passing data to REPLACE_LABEL. */ 1565 typedef struct replace_label_data 1566 { 1567 rtx r1; 1568 rtx r2; 1569 bool update_label_nuses; 1570 } replace_label_data; 1571 1572 extern int rtx_addr_can_trap_p (rtx); 1573 extern bool nonzero_address_p (rtx); 1574 extern int rtx_unstable_p (rtx); 1575 extern int rtx_varies_p (rtx, int); 1576 extern int rtx_addr_varies_p (rtx, int); 1577 extern HOST_WIDE_INT get_integer_term (rtx); 1578 extern rtx get_related_value (rtx); 1579 extern int global_reg_mentioned_p (rtx); 1580 extern int reg_mentioned_p (rtx, rtx); 1581 extern int count_occurrences (rtx, rtx, int); 1582 extern int reg_referenced_p (rtx, rtx); 1583 extern int reg_used_between_p (rtx, rtx, rtx); 1584 extern int reg_set_between_p (rtx, rtx, rtx); 1585 extern int commutative_operand_precedence (rtx); 1586 extern int swap_commutative_operands_p (rtx, rtx); 1587 extern int modified_between_p (rtx, rtx, rtx); 1588 extern int no_labels_between_p (rtx, rtx); 1589 extern int modified_in_p (rtx, rtx); 1590 extern int reg_set_p (rtx, rtx); 1591 extern rtx single_set_2 (rtx, rtx); 1592 extern int multiple_sets (rtx); 1593 extern int set_noop_p (rtx); 1594 extern int noop_move_p (rtx); 1595 extern rtx find_last_value (rtx, rtx *, rtx, int); 1596 extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *); 1597 extern int reg_overlap_mentioned_p (rtx, rtx); 1598 extern rtx set_of (rtx, rtx); 1599 extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *); 1600 extern void note_uses (rtx *, void (*) (rtx *, void *), void *); 1601 extern int dead_or_set_p (rtx, rtx); 1602 extern int dead_or_set_regno_p (rtx, unsigned int); 1603 extern rtx find_reg_note (rtx, enum reg_note, rtx); 1604 extern rtx find_regno_note (rtx, enum reg_note, unsigned int); 1605 extern rtx find_reg_equal_equiv_note (rtx); 1606 extern int find_reg_fusage (rtx, enum rtx_code, rtx); 1607 extern int find_regno_fusage (rtx, enum rtx_code, unsigned int); 1608 extern int pure_call_p (rtx); 1609 extern void remove_note (rtx, rtx); 1610 extern int side_effects_p (rtx); 1611 extern int volatile_refs_p (rtx); 1612 extern int volatile_insn_p (rtx); 1613 extern int may_trap_p (rtx); 1614 extern int may_trap_or_fault_p (rtx); 1615 extern int inequality_comparisons_p (rtx); 1616 extern rtx replace_rtx (rtx, rtx, rtx); 1617 extern rtx replace_regs (rtx, rtx *, unsigned int, int); 1618 extern int replace_label (rtx *, void *); 1619 extern int rtx_referenced_p (rtx, rtx); 1620 extern bool tablejump_p (rtx, rtx *, rtx *); 1621 extern int computed_jump_p (rtx); 1622 typedef int (*rtx_function) (rtx *, void *); 1623 extern int for_each_rtx (rtx *, rtx_function, void *); 1624 extern rtx regno_use_in (unsigned int, rtx); 1625 extern int auto_inc_p (rtx); 1626 extern int in_expr_list_p (rtx, rtx); 1627 extern void remove_node_from_expr_list (rtx, rtx *); 1628 extern int insns_safe_to_move_p (rtx, rtx, rtx *); 1629 extern int loc_mentioned_in_p (rtx *, rtx); 1630 extern rtx find_first_parameter_load (rtx, rtx); 1631 extern bool keep_with_call_p (rtx); 1632 extern bool label_is_jump_target_p (rtx, rtx); 1633 extern int insn_rtx_cost (rtx); 1634 1635 /* Given an insn and condition, return a canonical description of 1636 the test being made. */ 1637 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int); 1638 1639 /* Given a JUMP_INSN, return a canonical description of the test 1640 being made. */ 1641 extern rtx get_condition (rtx, rtx *, int, int); 1642 1643 1644 /* flow.c */ 1645 1646 extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT); 1647 1648 /* lists.c */ 1649 1650 void free_EXPR_LIST_list (rtx *); 1651 void free_INSN_LIST_list (rtx *); 1652 void free_EXPR_LIST_node (rtx); 1653 void free_INSN_LIST_node (rtx); 1654 rtx alloc_INSN_LIST (rtx, rtx); 1655 rtx alloc_EXPR_LIST (int, rtx, rtx); 1656 1657 /* regclass.c */ 1658 1659 /* Maximum number of parallel sets and clobbers in any insn in this fn. 1660 Always at least 3, since the combiner could put that many together 1661 and we want this to remain correct for all the remaining passes. */ 1662 1663 extern int max_parallel; 1664 1665 /* Free up register info memory. */ 1666 extern void free_reg_info (void); 1667 1668 /* recog.c */ 1669 extern int asm_noperands (rtx); 1670 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **, 1671 enum machine_mode *); 1672 1673 extern enum reg_class reg_preferred_class (int); 1674 extern enum reg_class reg_alternate_class (int); 1675 1676 extern void split_all_insns (int); 1677 extern void split_all_insns_noflow (void); 1678 1679 #define MAX_SAVED_CONST_INT 64 1680 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; 1681 1682 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT]) 1683 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1]) 1684 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2]) 1685 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1]) 1686 extern GTY(()) rtx const_true_rtx; 1687 1688 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; 1689 1690 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the 1691 same as VOIDmode. */ 1692 1693 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) 1694 1695 /* Likewise, for the constants 1 and 2. */ 1696 1697 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) 1698 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) 1699 1700 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg 1701 is used to represent the frame pointer. This is because the 1702 hard frame pointer and the automatic variables are separated by an amount 1703 that cannot be determined until after register allocation. We can assume 1704 that in this case ELIMINABLE_REGS will be defined, one action of which 1705 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ 1706 #ifndef HARD_FRAME_POINTER_REGNUM 1707 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM 1708 #endif 1709 1710 /* Index labels for global_rtl. */ 1711 enum global_rtl_index 1712 { 1713 GR_PC, 1714 GR_CC0, 1715 GR_STACK_POINTER, 1716 GR_FRAME_POINTER, 1717 /* For register elimination to work properly these hard_frame_pointer_rtx, 1718 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to 1719 the same register. */ 1720 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1721 GR_ARG_POINTER = GR_FRAME_POINTER, 1722 #endif 1723 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM 1724 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER, 1725 #else 1726 GR_HARD_FRAME_POINTER, 1727 #endif 1728 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM 1729 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1730 GR_ARG_POINTER = GR_HARD_FRAME_POINTER, 1731 #else 1732 GR_ARG_POINTER, 1733 #endif 1734 #endif 1735 GR_VIRTUAL_INCOMING_ARGS, 1736 GR_VIRTUAL_STACK_ARGS, 1737 GR_VIRTUAL_STACK_DYNAMIC, 1738 GR_VIRTUAL_OUTGOING_ARGS, 1739 GR_VIRTUAL_CFA, 1740 1741 GR_MAX 1742 }; 1743 1744 /* Pointers to standard pieces of rtx are stored here. */ 1745 extern GTY(()) rtx global_rtl[GR_MAX]; 1746 1747 /* Standard pieces of rtx, to be substituted directly into things. */ 1748 #define pc_rtx (global_rtl[GR_PC]) 1749 #define cc0_rtx (global_rtl[GR_CC0]) 1750 1751 /* All references to certain hard regs, except those created 1752 by allocating pseudo regs into them (when that's possible), 1753 go through these unique rtx objects. */ 1754 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER]) 1755 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER]) 1756 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER]) 1757 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER]) 1758 1759 extern GTY(()) rtx pic_offset_table_rtx; 1760 extern GTY(()) rtx static_chain_rtx; 1761 extern GTY(()) rtx static_chain_incoming_rtx; 1762 extern GTY(()) rtx return_address_pointer_rtx; 1763 1764 /* Include the RTL generation functions. */ 1765 1766 #ifndef GENERATOR_FILE 1767 #include "genrtl.h" 1768 #ifndef USE_MAPPED_LOCATION 1769 #undef gen_rtx_ASM_OPERANDS 1770 #define gen_rtx_ASM_OPERANDS(MODE, ARG0, ARG1, ARG2, ARG3, ARG4, LOC) \ 1771 gen_rtx_fmt_ssiEEsi (ASM_OPERANDS, (MODE), (ARG0), (ARG1), (ARG2), (ARG3), (ARG4), (LOC).file, (LOC).line) 1772 #endif 1773 #endif 1774 1775 /* There are some RTL codes that require special attention; the 1776 generation functions included above do the raw handling. If you 1777 add to this list, modify special_rtx in gengenrtl.c as well. */ 1778 1779 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT); 1780 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec); 1781 extern rtx gen_raw_REG (enum machine_mode, int); 1782 extern rtx gen_rtx_REG (enum machine_mode, unsigned); 1783 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int); 1784 extern rtx gen_rtx_MEM (enum machine_mode, rtx); 1785 1786 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (N)) 1787 1788 /* Virtual registers are used during RTL generation to refer to locations into 1789 the stack frame when the actual location isn't known until RTL generation 1790 is complete. The routine instantiate_virtual_regs replaces these with 1791 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus 1792 a constant. */ 1793 1794 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) 1795 1796 /* This points to the first word of the incoming arguments passed on the stack, 1797 either by the caller or by the callee when pretending it was passed by the 1798 caller. */ 1799 1800 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS]) 1801 1802 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) 1803 1804 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first 1805 variable on the stack. Otherwise, it points to the first variable on 1806 the stack. */ 1807 1808 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS]) 1809 1810 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) 1811 1812 /* This points to the location of dynamically-allocated memory on the stack 1813 immediately after the stack pointer has been adjusted by the amount 1814 desired. */ 1815 1816 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC]) 1817 1818 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) 1819 1820 /* This points to the location in the stack at which outgoing arguments should 1821 be written when the stack is pre-pushed (arguments pushed using push 1822 insns always use sp). */ 1823 1824 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS]) 1825 1826 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) 1827 1828 /* This points to the Canonical Frame Address of the function. This 1829 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET, 1830 but is calculated relative to the arg pointer for simplicity; the 1831 frame pointer nor stack pointer are necessarily fixed relative to 1832 the CFA until after reload. */ 1833 1834 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA]) 1835 1836 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4) 1837 1838 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4) 1839 1840 /* Nonzero if REGNUM is a pointer into the stack frame. */ 1841 #define REGNO_PTR_FRAME_P(REGNUM) \ 1842 ((REGNUM) == STACK_POINTER_REGNUM \ 1843 || (REGNUM) == FRAME_POINTER_REGNUM \ 1844 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \ 1845 || (REGNUM) == ARG_POINTER_REGNUM \ 1846 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \ 1847 && (REGNUM) <= LAST_VIRTUAL_REGISTER)) 1848 1849 /* REGNUM never really appearing in the INSN stream. */ 1850 #define INVALID_REGNUM (~(unsigned int) 0) 1851 1852 extern rtx output_constant_def (tree, int); 1853 extern rtx lookup_constant_def (tree); 1854 1855 /* Nonzero after the second flow pass has completed. 1856 Set to 1 or 0 by toplev.c */ 1857 extern int flow2_completed; 1858 1859 /* Nonzero after end of reload pass. 1860 Set to 1 or 0 by reload1.c. */ 1861 1862 extern int reload_completed; 1863 1864 /* Nonzero after thread_prologue_and_epilogue_insns has run. */ 1865 extern int epilogue_completed; 1866 1867 /* Set to 1 while reload_as_needed is operating. 1868 Required by some machines to handle any generated moves differently. */ 1869 1870 extern int reload_in_progress; 1871 1872 /* If this is nonzero, we do not bother generating VOLATILE 1873 around volatile memory references, and we are willing to 1874 output indirect addresses. If cse is to follow, we reject 1875 indirect addresses so a useful potential cse is generated; 1876 if it is used only once, instruction combination will produce 1877 the same indirect address eventually. */ 1878 extern int cse_not_expected; 1879 1880 /* Set to nonzero before life analysis to indicate that it is unsafe to 1881 generate any new pseudo registers. */ 1882 extern int no_new_pseudos; 1883 1884 /* Translates rtx code to tree code, for those codes needed by 1885 REAL_ARITHMETIC. The function returns an int because the caller may not 1886 know what `enum tree_code' means. */ 1887 1888 extern int rtx_to_tree_code (enum rtx_code); 1889 1890 /* In cse.c */ 1891 extern int delete_trivially_dead_insns (rtx, int); 1892 extern int cse_main (rtx, int, FILE *); 1893 extern void cse_condition_code_reg (void); 1894 extern int exp_equiv_p (rtx, rtx, int, bool); 1895 extern unsigned hash_rtx (rtx x, enum machine_mode, int *, int *, bool); 1896 1897 /* In jump.c */ 1898 extern int comparison_dominates_p (enum rtx_code, enum rtx_code); 1899 extern int condjump_p (rtx); 1900 extern int any_condjump_p (rtx); 1901 extern int any_uncondjump_p (rtx); 1902 extern rtx pc_set (rtx); 1903 extern rtx condjump_label (rtx); 1904 extern int simplejump_p (rtx); 1905 extern int returnjump_p (rtx); 1906 extern int onlyjump_p (rtx); 1907 extern int only_sets_cc0_p (rtx); 1908 extern int sets_cc0_p (rtx); 1909 extern int invert_jump_1 (rtx, rtx); 1910 extern int invert_jump (rtx, rtx, int); 1911 extern int rtx_renumbered_equal_p (rtx, rtx); 1912 extern int true_regnum (rtx); 1913 extern unsigned int reg_or_subregno (rtx); 1914 extern int redirect_jump_1 (rtx, rtx); 1915 extern void redirect_jump_2 (rtx, rtx, rtx, int, int); 1916 extern int redirect_jump (rtx, rtx, int); 1917 extern void rebuild_jump_labels (rtx); 1918 extern rtx reversed_comparison (rtx, enum machine_mode); 1919 extern enum rtx_code reversed_comparison_code (rtx, rtx); 1920 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, 1921 rtx, rtx, rtx); 1922 extern void delete_for_peephole (rtx, rtx); 1923 extern int condjump_in_parallel_p (rtx); 1924 extern void purge_line_number_notes (void); 1925 1926 /* In emit-rtl.c. */ 1927 extern int max_reg_num (void); 1928 extern int max_label_num (void); 1929 extern int get_first_label_num (void); 1930 extern void maybe_set_first_label_num (rtx); 1931 extern void delete_insns_since (rtx); 1932 extern void mark_reg_pointer (rtx, int); 1933 extern void mark_user_reg (rtx); 1934 extern void reset_used_flags (rtx); 1935 extern void set_used_flags (rtx); 1936 extern void reorder_insns (rtx, rtx, rtx); 1937 extern void reorder_insns_nobb (rtx, rtx, rtx); 1938 extern int get_max_uid (void); 1939 extern int in_sequence_p (void); 1940 extern void force_next_line_note (void); 1941 extern void init_emit (void); 1942 extern void init_emit_once (int); 1943 extern void push_topmost_sequence (void); 1944 extern void pop_topmost_sequence (void); 1945 extern void set_new_first_and_last_insn (rtx, rtx); 1946 extern void unshare_all_rtl (void); 1947 extern void unshare_all_rtl_again (rtx); 1948 extern void unshare_all_rtl_in_chain (rtx); 1949 extern void verify_rtl_sharing (void); 1950 extern void set_first_insn (rtx); 1951 extern void set_last_insn (rtx); 1952 extern void link_cc0_insns (rtx); 1953 extern void add_insn (rtx); 1954 extern void add_insn_before (rtx, rtx); 1955 extern void add_insn_after (rtx, rtx); 1956 extern void remove_insn (rtx); 1957 extern void emit_insn_after_with_line_notes (rtx, rtx, rtx); 1958 extern rtx emit (rtx); 1959 extern void renumber_insns (FILE *); 1960 extern void remove_unnecessary_notes (void); 1961 extern rtx delete_insn (rtx); 1962 extern rtx entry_of_function (void); 1963 extern void delete_insn_chain (rtx, rtx); 1964 extern rtx unlink_insn_chain (rtx, rtx); 1965 extern rtx delete_insn_and_edges (rtx); 1966 extern void delete_insn_chain_and_edges (rtx, rtx); 1967 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx); 1968 extern rtx gen_const_mem (enum machine_mode, rtx); 1969 extern rtx gen_frame_mem (enum machine_mode, rtx); 1970 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx); 1971 extern bool validate_subreg (enum machine_mode, enum machine_mode, 1972 rtx, unsigned int); 1973 1974 /* In combine.c */ 1975 extern int combine_instructions (rtx, unsigned int); 1976 extern unsigned int extended_count (rtx, enum machine_mode, int); 1977 extern rtx remove_death (unsigned int, rtx); 1978 extern void dump_combine_stats (FILE *); 1979 extern void dump_combine_total_stats (FILE *); 1980 /* In web.c */ 1981 extern void web_main (void); 1982 1983 /* In sched-rgn.c. */ 1984 extern void schedule_insns (FILE *); 1985 1986 /* In sched-ebb.c. */ 1987 extern void schedule_ebbs (FILE *); 1988 1989 /* In haifa-sched.c. */ 1990 extern void fix_sched_param (const char *, const char *); 1991 1992 /* In print-rtl.c */ 1993 extern const char *print_rtx_head; 1994 extern void debug_rtx (rtx); 1995 extern void debug_rtx_list (rtx, int); 1996 extern void debug_rtx_range (rtx, rtx); 1997 extern rtx debug_rtx_find (rtx, int); 1998 extern void print_mem_expr (FILE *, tree); 1999 extern void print_rtl (FILE *, rtx); 2000 extern void print_simple_rtl (FILE *, rtx); 2001 extern int print_rtl_single (FILE *, rtx); 2002 extern void print_inline_rtx (FILE *, rtx, int); 2003 2004 /* In loop.c */ 2005 extern void init_loop (void); 2006 extern void loop_optimize (rtx, FILE *, int); 2007 2008 /* In bt-load.c */ 2009 extern void branch_target_load_optimize (bool); 2010 2011 /* In function.c */ 2012 extern void reposition_prologue_and_epilogue_notes (rtx); 2013 extern void thread_prologue_and_epilogue_insns (rtx); 2014 extern int prologue_epilogue_contains (rtx); 2015 extern int sibcall_epilogue_contains (rtx); 2016 extern void mark_temp_addr_taken (rtx); 2017 extern void update_temp_slot_address (rtx, rtx); 2018 2019 /* In stmt.c */ 2020 extern void expand_null_return (void); 2021 extern void expand_naked_return (void); 2022 extern void emit_jump (rtx); 2023 2024 /* In expr.c */ 2025 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT, 2026 unsigned int, int); 2027 2028 /* In flow.c */ 2029 extern void recompute_reg_usage (void); 2030 extern int initialize_uninitialized_subregs (void); 2031 extern void delete_dead_jumptables (void); 2032 extern void print_rtl_with_bb (FILE *, rtx); 2033 extern void dump_flow_info (FILE *); 2034 2035 /* In expmed.c */ 2036 extern void init_expmed (void); 2037 extern void expand_inc (rtx, rtx); 2038 extern void expand_dec (rtx, rtx); 2039 2040 /* In gcse.c */ 2041 extern bool can_copy_p (enum machine_mode); 2042 extern rtx fis_get_condition (rtx); 2043 extern int gcse_main (rtx, FILE *); 2044 extern int bypass_jumps (FILE *); 2045 2046 /* In postreload-gcse.c */ 2047 extern void gcse_after_reload_main (rtx); 2048 2049 /* In global.c */ 2050 extern void mark_elimination (int, int); 2051 extern int global_alloc (FILE *); 2052 extern void dump_global_regs (FILE *); 2053 #ifdef HARD_CONST 2054 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */ 2055 extern void retry_global_alloc (int, HARD_REG_SET); 2056 #endif 2057 extern void build_insn_chain (rtx); 2058 2059 /* In regclass.c */ 2060 extern int reg_classes_intersect_p (enum reg_class, enum reg_class); 2061 extern int reg_class_subset_p (enum reg_class, enum reg_class); 2062 extern void globalize_reg (int); 2063 extern void init_reg_modes_once (void); 2064 extern void init_regs (void); 2065 extern void init_fake_stack_mems (void); 2066 extern void init_reg_sets (void); 2067 extern void regclass_init (void); 2068 extern void regclass (rtx, int, FILE *); 2069 extern void reg_scan (rtx, unsigned int); 2070 extern void reg_scan_update (rtx, rtx, unsigned int); 2071 extern void fix_register (const char *, int, int); 2072 extern void init_subregs_of_mode (void); 2073 extern void record_subregs_of_mode (rtx); 2074 #ifdef HARD_CONST 2075 extern void cannot_change_mode_set_regs (HARD_REG_SET *, 2076 enum machine_mode, unsigned int); 2077 #endif 2078 extern bool invalid_mode_change_p (unsigned int, enum reg_class, 2079 enum machine_mode); 2080 2081 /* In regmove.c */ 2082 extern void regmove_optimize (rtx, int, FILE *); 2083 extern void combine_stack_adjustments (void); 2084 2085 /* In reorg.c */ 2086 extern void dbr_schedule (rtx, FILE *); 2087 2088 /* In local-alloc.c */ 2089 extern void dump_local_alloc (FILE *); 2090 extern int local_alloc (void); 2091 2092 /* In reload1.c */ 2093 extern int function_invariant_p (rtx); 2094 2095 /* In reg-stack.c */ 2096 extern bool reg_to_stack (FILE *); 2097 2098 /* In calls.c */ 2099 enum libcall_type 2100 { 2101 LCT_NORMAL = 0, 2102 LCT_CONST = 1, 2103 LCT_PURE = 2, 2104 LCT_CONST_MAKE_BLOCK = 3, 2105 LCT_PURE_MAKE_BLOCK = 4, 2106 LCT_NORETURN = 5, 2107 LCT_THROW = 6, 2108 LCT_RETURNS_TWICE = 7 2109 }; 2110 2111 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int, 2112 ...); 2113 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type, 2114 enum machine_mode, int, ...); 2115 2116 /* In varasm.c */ 2117 extern int in_data_section (void); 2118 extern void init_varasm_once (void); 2119 extern enum tls_model decl_default_tls_model (tree); 2120 2121 /* In rtl.c */ 2122 extern void traverse_md_constants (int (*) (void **, void *), void *); 2123 struct md_constant { char *name, *value; }; 2124 2125 /* In read-rtl.c */ 2126 extern int read_skip_spaces (FILE *); 2127 extern bool read_rtx (FILE *, rtx *, int *); 2128 extern void copy_rtx_ptr_loc (const void *, const void *); 2129 extern void print_rtx_ptr_loc (const void *); 2130 extern const char *join_c_conditions (const char *, const char *); 2131 extern void print_c_condition (const char *); 2132 extern const char *read_rtx_filename; 2133 extern int read_rtx_lineno; 2134 2135 /* In alias.c */ 2136 extern void clear_reg_alias_info (rtx); 2137 extern rtx canon_rtx (rtx); 2138 extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int)); 2139 extern rtx get_addr (rtx); 2140 extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx, 2141 int (*)(rtx, int)); 2142 extern int read_dependence (rtx, rtx); 2143 extern int anti_dependence (rtx, rtx); 2144 extern int output_dependence (rtx, rtx); 2145 extern void mark_constant_function (void); 2146 extern void init_alias_once (void); 2147 extern void init_alias_analysis (void); 2148 extern void end_alias_analysis (void); 2149 extern bool memory_modified_in_insn_p (rtx, rtx); 2150 extern rtx find_base_term (rtx); 2151 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int); 2152 extern rtx get_reg_known_value (unsigned int); 2153 extern bool get_reg_known_equiv_p (unsigned int); 2154 2155 #ifdef STACK_REGS 2156 extern int stack_regs_mentioned (rtx insn); 2157 #endif 2158 2159 /* In toplev.c */ 2160 extern GTY(()) rtx stack_limit_rtx; 2161 2162 /* In regrename.c */ 2163 extern void regrename_optimize (void); 2164 extern void copyprop_hardreg_forward (void); 2165 2166 /* In ifcvt.c */ 2167 extern void if_convert (int); 2168 2169 /* In predict.c */ 2170 extern void invert_br_probabilities (rtx); 2171 extern bool expensive_function_p (int); 2172 /* In tracer.c */ 2173 extern void tracer (unsigned int); 2174 2175 /* In var-tracking.c */ 2176 extern void variable_tracking_main (void); 2177 2178 /* In stor-layout.c. */ 2179 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode, 2180 rtx *, rtx *); 2181 2182 /* In loop-unswitch.c */ 2183 extern rtx reversed_condition (rtx); 2184 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx); 2185 2186 /* In loop-iv.c */ 2187 extern rtx canon_condition (rtx); 2188 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *); 2189 2190 /* In ra.c. */ 2191 extern void reg_alloc (void); 2192 2193 /* In modulo-sched.c. */ 2194 extern void sms_schedule (FILE *); 2195 2196 struct rtl_hooks 2197 { 2198 rtx (*gen_lowpart) (enum machine_mode, rtx); 2199 rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx); 2200 rtx (*reg_nonzero_bits) (rtx, enum machine_mode, rtx, enum machine_mode, 2201 unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *); 2202 rtx (*reg_num_sign_bit_copies) (rtx, enum machine_mode, rtx, enum machine_mode, 2203 unsigned int, unsigned int *); 2204 2205 /* Whenever you add entries here, make sure you adjust hosthooks-def.h. */ 2206 }; 2207 2208 /* Each pass can provide its own. */ 2209 extern struct rtl_hooks rtl_hooks; 2210 2211 /* ... but then it has to restore these. */ 2212 extern const struct rtl_hooks general_rtl_hooks; 2213 2214 /* Keep this for the nonce. */ 2215 #define gen_lowpart rtl_hooks.gen_lowpart 2216 2217 #endif /* ! GCC_RTL_H */ 2218