rtl.h revision 146895
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 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 59 Temple Place - Suite 330, Boston, MA 2002111-1307, USA. */ 21 22#ifndef GCC_RTL_H 23#define GCC_RTL_H 24 25struct function; 26 27#include "machmode.h" 28#include "input.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 42enum 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 55extern const unsigned char rtx_length[NUM_RTX_CODE]; 56#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)]) 57 58extern const char * const rtx_name[NUM_RTX_CODE]; 59#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)]) 60 61extern const char * const rtx_format[NUM_RTX_CODE]; 62#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)]) 63 64extern const char rtx_class[NUM_RTX_CODE]; 65#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) 66 67extern const unsigned char rtx_size[NUM_RTX_CODE]; 68extern const unsigned char rtx_next[NUM_RTX_CODE]; 69 70/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label 71 relative to which the offsets are calculated, as explained in rtl.def. */ 72typedef struct 73{ 74 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */ 75 unsigned min_align: 8; 76 /* Flags: */ 77 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */ 78 unsigned min_after_vec: 1; /* minimum address target label is 79 after the ADDR_DIFF_VEC. */ 80 unsigned max_after_vec: 1; /* maximum address target label is 81 after the ADDR_DIFF_VEC. */ 82 unsigned min_after_base: 1; /* minimum address target label is 83 after BASE. */ 84 unsigned max_after_base: 1; /* maximum address target label is 85 after BASE. */ 86 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */ 87 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */ 88 unsigned : 2; 89 unsigned scale : 8; 90} addr_diff_vec_flags; 91 92/* Structure used to describe the attributes of a MEM. These are hashed 93 so MEMs that the same attributes share a data structure. This means 94 they cannot be modified in place. If any element is nonzero, it means 95 the value of the corresponding attribute is unknown. */ 96/* ALIGN and SIZE are the alignment and size of the MEM itself, 97 while EXPR can describe a larger underlying object, which might have a 98 stricter alignment; OFFSET is the offset of the MEM within that object. */ 99typedef struct mem_attrs GTY(()) 100{ 101 HOST_WIDE_INT alias; /* Memory alias set. */ 102 tree expr; /* expr corresponding to MEM. */ 103 rtx offset; /* Offset from start of DECL, as CONST_INT. */ 104 rtx size; /* Size in bytes, as a CONST_INT. */ 105 unsigned int align; /* Alignment of MEM in bits. */ 106} mem_attrs; 107 108/* Structure used to describe the attributes of a REG in similar way as 109 mem_attrs does for MEM above. */ 110 111typedef struct reg_attrs GTY(()) 112{ 113 tree decl; /* decl corresponding to REG. */ 114 HOST_WIDE_INT offset; /* Offset from start of DECL. */ 115} reg_attrs; 116 117/* Common union for an element of an rtx. */ 118 119union rtunion_def 120{ 121 int rtint; 122 unsigned int rtuint; 123 const char *rtstr; 124 rtx rtx; 125 rtvec rtvec; 126 enum machine_mode rttype; 127 addr_diff_vec_flags rt_addr_diff_vec_flags; 128 struct cselib_val_struct *rt_cselib; 129 struct bitmap_head_def *rtbit; 130 tree rttree; 131 struct basic_block_def *bb; 132 mem_attrs *rtmem; 133 reg_attrs *rtreg; 134}; 135typedef union rtunion_def rtunion; 136 137/* RTL expression ("rtx"). */ 138 139struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"), 140 chain_prev ("RTX_PREV (&%h)"))) 141{ 142 /* The kind of expression this is. */ 143 ENUM_BITFIELD(rtx_code) code: 16; 144 145 /* The kind of value the expression has. */ 146 ENUM_BITFIELD(machine_mode) mode : 8; 147 148 /* 1 in a MEM if we should keep the alias set for this mem unchanged 149 when we access a component. 150 1 in a CALL_INSN if it is a sibling call. 151 1 in a SET that is for a return. 152 In a CODE_LABEL, part of the two-bit alternate entry field. */ 153 unsigned int jump : 1; 154 /* In a CODE_LABEL, part of the two-bit alternate entry field. 155 1 in a MEM if it cannot trap. */ 156 unsigned int call : 1; 157 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere. 158 1 in a SUBREG if it references an unsigned object whose mode has been 159 from a promoted to a wider mode. 160 1 in a SYMBOL_REF if it addresses something in the per-function 161 constants pool. 162 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call. 163 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */ 164 unsigned int unchanging : 1; 165 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile. 166 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE 167 if it has been deleted. 168 1 in a REG expression if corresponds to a variable declared by the user, 169 0 for an internally generated temporary. 170 1 in a SUBREG with a negative value. 171 1 in a LABEL_REF or in a REG_LABEL note for a non-local label. 172 In a SYMBOL_REF, this flag is used for machine-specific purposes. */ 173 unsigned int volatil : 1; 174 /* 1 in a MEM referring to a field of an aggregate. 175 0 if the MEM was a variable or the result of a * operator in C; 176 1 if it was the result of a . or -> operator (on a struct) in C. 177 1 in a REG if the register is used only in exit code a loop. 178 1 in a SUBREG expression if was generated from a variable with a 179 promoted mode. 180 1 in a CODE_LABEL if the label is used for nonlocal gotos 181 and must not be deleted even if its count is zero. 182 1 in a LABEL_REF if this is a reference to a label outside the 183 current loop. 184 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled 185 together with the preceding insn. Valid only within sched. 186 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and 187 from the target of a branch. Valid from reorg until end of compilation; 188 cleared before used. 189 1 in an INSN, JUMP_INSN or CALL_INSN or related rtx if this insn is 190 dead code. Valid only during dead-code elimination phase; cleared 191 before use. */ 192 unsigned int in_struct : 1; 193 /* At the end of RTL generation, 1 if this rtx is used. This is used for 194 copying shared structure. See `unshare_all_rtl'. 195 In a REG, this is not needed for that purpose, and used instead 196 in `leaf_renumber_regs_insn'. 197 1 in a SYMBOL_REF, means that emit_library_call 198 has used it as the function. */ 199 unsigned int used : 1; 200 /* Nonzero if this rtx came from procedure integration. 201 1 in a REG or PARALLEL means this rtx refers to the return value 202 of the current function. 203 1 in a SYMBOL_REF if the symbol is weak. */ 204 unsigned integrated : 1; 205 /* 1 in an INSN or a SET if this rtx is related to the call frame, 206 either changing how we compute the frame address or saving and 207 restoring registers in the prologue and epilogue. 208 1 in a MEM if the MEM refers to a scalar, rather than a member of 209 an aggregate. 210 1 in a REG if the register is a pointer. 211 1 in a SYMBOL_REF if it addresses something in the per-function 212 constant string pool. */ 213 unsigned frame_related : 1; 214 215 /* The first element of the operands of this rtx. 216 The number of operands and their types are controlled 217 by the `code' field, according to rtl.def. */ 218 union u { 219 rtunion fld[1]; 220 HOST_WIDE_INT hwint[1]; 221 } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u; 222}; 223 224/* The size in bytes of an rtx header (code, mode and flags). */ 225#define RTX_HDR_SIZE offsetof (struct rtx_def, u) 226 227/* The size in bytes of an rtx with code CODE. */ 228#define RTX_SIZE(CODE) rtx_size[CODE] 229 230#define NULL_RTX (rtx) 0 231 232/* The "next" and "previous" RTX, relative to this one. */ 233 234#define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \ 235 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)])) 236 237/* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed. 238 */ 239#define RTX_PREV(X) ((GET_CODE (X) == INSN \ 240 || GET_CODE (X) == CALL_INSN \ 241 || GET_CODE (X) == JUMP_INSN \ 242 || GET_CODE (X) == NOTE \ 243 || GET_CODE (X) == BARRIER \ 244 || GET_CODE (X) == CODE_LABEL) \ 245 && PREV_INSN (X) != NULL \ 246 && NEXT_INSN (PREV_INSN (X)) == X \ 247 ? PREV_INSN (X) : NULL) 248 249/* Define macros to access the `code' field of the rtx. */ 250 251#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code) 252#define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE)) 253 254#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode) 255#define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE)) 256 257/* RTL vector. These appear inside RTX's when there is a need 258 for a variable number of things. The principle use is inside 259 PARALLEL expressions. */ 260 261struct rtvec_def GTY(()) { 262 int num_elem; /* number of elements */ 263 rtx GTY ((length ("%h.num_elem"))) elem[1]; 264}; 265 266#define NULL_RTVEC (rtvec) 0 267 268#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) 269#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM)) 270 271/* Predicate yielding nonzero iff X is an rtl for a register. */ 272#define REG_P(X) (GET_CODE (X) == REG) 273 274/* Predicate yielding nonzero iff X is a label insn. */ 275#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL) 276 277/* Predicate yielding nonzero iff X is a jump insn. */ 278#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN) 279 280/* Predicate yielding nonzero iff X is a note insn. */ 281#define NOTE_P(X) (GET_CODE (X) == NOTE) 282 283/* Predicate yielding nonzero iff X is a barrier insn. */ 284#define BARRIER_P(X) (GET_CODE (X) == BARRIER) 285 286/* Predicate yielding nonzero iff X is a data for a jump table. */ 287#define JUMP_TABLE_DATA_P(INSN) \ 288 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \ 289 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC)) 290 291/* 1 if X is a constant value that is an integer. */ 292 293#define CONSTANT_P(X) \ 294 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 295 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \ 296 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \ 297 || GET_CODE (X) == CONST_VECTOR \ 298 || GET_CODE (X) == CONSTANT_P_RTX) 299 300/* General accessor macros for accessing the fields of an rtx. */ 301 302#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007) 303/* The bit with a star outside the statement expr and an & inside is 304 so that N can be evaluated only once. */ 305#define RTL_CHECK1(RTX, N, C1) __extension__ \ 306(*({ rtx const _rtx = (RTX); const int _n = (N); \ 307 const enum rtx_code _code = GET_CODE (_rtx); \ 308 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 309 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 310 __FUNCTION__); \ 311 if (GET_RTX_FORMAT(_code)[_n] != C1) \ 312 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \ 313 __FUNCTION__); \ 314 &_rtx->u.fld[_n]; })) 315 316#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \ 317(*({ rtx const _rtx = (RTX); const int _n = (N); \ 318 const enum rtx_code _code = GET_CODE (_rtx); \ 319 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 320 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 321 __FUNCTION__); \ 322 if (GET_RTX_FORMAT(_code)[_n] != C1 \ 323 && GET_RTX_FORMAT(_code)[_n] != C2) \ 324 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \ 325 __FUNCTION__); \ 326 &_rtx->u.fld[_n]; })) 327 328#define RTL_CHECKC1(RTX, N, C) __extension__ \ 329(*({ rtx const _rtx = (RTX); const int _n = (N); \ 330 if (GET_CODE (_rtx) != (C)) \ 331 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \ 332 __FUNCTION__); \ 333 &_rtx->u.fld[_n]; })) 334 335#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \ 336(*({ rtx const _rtx = (RTX); const int _n = (N); \ 337 const enum rtx_code _code = GET_CODE (_rtx); \ 338 if (_code != (C1) && _code != (C2)) \ 339 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \ 340 __FUNCTION__); \ 341 &_rtx->u.fld[_n]; })) 342 343#define RTVEC_ELT(RTVEC, I) __extension__ \ 344(*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \ 345 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \ 346 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \ 347 __FUNCTION__); \ 348 &_rtvec->elem[_i]; })) 349 350#define XWINT(RTX, N) __extension__ \ 351(*({ rtx const _rtx = (RTX); const int _n = (N); \ 352 const enum rtx_code _code = GET_CODE (_rtx); \ 353 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 354 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 355 __FUNCTION__); \ 356 if (GET_RTX_FORMAT(_code)[_n] != 'w') \ 357 rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__, \ 358 __FUNCTION__); \ 359 &_rtx->u.hwint[_n]; })) 360 361#define XCWINT(RTX, N, C) __extension__ \ 362(*({ rtx const _rtx = (RTX); \ 363 if (GET_CODE (_rtx) != (C)) \ 364 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \ 365 __FUNCTION__); \ 366 &_rtx->u.hwint[N]; })) 367 368extern void rtl_check_failed_bounds (rtx, int, const char *, int, 369 const char *) 370 ATTRIBUTE_NORETURN; 371extern void rtl_check_failed_type1 (rtx, int, int, const char *, int, 372 const char *) 373 ATTRIBUTE_NORETURN; 374extern void rtl_check_failed_type2 (rtx, int, int, int, const char *, 375 int, const char *) 376 ATTRIBUTE_NORETURN; 377extern void rtl_check_failed_code1 (rtx, enum rtx_code, const char *, 378 int, const char *) 379 ATTRIBUTE_NORETURN; 380extern void rtl_check_failed_code2 (rtx, enum rtx_code, enum rtx_code, 381 const char *, int, const char *) 382 ATTRIBUTE_NORETURN; 383extern void rtvec_check_failed_bounds (rtvec, int, const char *, int, 384 const char *) 385 ATTRIBUTE_NORETURN; 386 387#else /* not ENABLE_RTL_CHECKING */ 388 389#define RTL_CHECK1(RTX, N, C1) ((RTX)->u.fld[N]) 390#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->u.fld[N]) 391#define RTL_CHECKC1(RTX, N, C) ((RTX)->u.fld[N]) 392#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N]) 393#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I]) 394#define XWINT(RTX, N) ((RTX)->u.hwint[N]) 395#define XCWINT(RTX, N, C) ((RTX)->u.hwint[N]) 396 397#endif 398 399/* General accessor macros for accessing the flags of an rtx. */ 400 401/* Access an individual rtx flag, with no checking of any kind. */ 402#define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG) 403 404#if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007) 405#define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \ 406({ rtx const _rtx = (RTX); \ 407 if (GET_CODE(_rtx) != C1) \ 408 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 409 __FUNCTION__); \ 410 _rtx; }) 411 412#define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \ 413({ rtx const _rtx = (RTX); \ 414 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \ 415 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \ 416 __FUNCTION__); \ 417 _rtx; }) 418 419#define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \ 420({ rtx const _rtx = (RTX); \ 421 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 422 && GET_CODE(_rtx) != C3) \ 423 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 424 __FUNCTION__); \ 425 _rtx; }) 426 427#define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \ 428({ rtx const _rtx = (RTX); \ 429 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 430 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \ 431 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 432 __FUNCTION__); \ 433 _rtx; }) 434 435#define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \ 436({ rtx const _rtx = (RTX); \ 437 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 438 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 439 && GET_CODE(_rtx) != C5) \ 440 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 441 __FUNCTION__); \ 442 _rtx; }) 443 444#define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \ 445 __extension__ \ 446({ rtx const _rtx = (RTX); \ 447 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 448 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 449 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \ 450 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \ 451 __FUNCTION__); \ 452 _rtx; }) 453 454#define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \ 455 __extension__ \ 456({ rtx const _rtx = (RTX); \ 457 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 458 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 459 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 460 && GET_CODE(_rtx) != C7) \ 461 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 462 __FUNCTION__); \ 463 _rtx; }) 464 465#define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \ 466 __extension__ \ 467({ rtx const _rtx = (RTX); \ 468 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 469 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 470 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 471 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \ 472 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 473 __FUNCTION__); \ 474 _rtx; }) 475 476extern void rtl_check_failed_flag (const char *, rtx, const char *, 477 int, const char *) 478 ATTRIBUTE_NORETURN 479 ; 480 481#else /* not ENABLE_RTL_FLAG_CHECKING */ 482 483#define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX) 484#define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX) 485#define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX) 486#define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX) 487#define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX) 488#define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX) 489#define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX) 490#define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX) 491#endif 492 493#define CLEAR_RTX_FLAGS(RTX) \ 494do { \ 495 rtx const _rtx = (RTX); \ 496 _rtx->call = 0; \ 497 _rtx->frame_related = 0; \ 498 _rtx->in_struct = 0; \ 499 _rtx->integrated = 0; \ 500 _rtx->jump = 0; \ 501 _rtx->unchanging = 0; \ 502 _rtx->used = 0; \ 503 _rtx->volatil = 0; \ 504} while (0) 505 506#define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint) 507#define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr) 508#define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx) 509#define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec) 510#define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype) 511#define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit) 512#define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree) 513#define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb) 514#define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr) 515 516#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M) 517#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N)) 518 519/* These are like XINT, etc. except that they expect a '0' field instead 520 of the normal type code. */ 521 522#define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint) 523#define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint) 524#define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr) 525#define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx) 526#define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec) 527#define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype) 528#define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit) 529#define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree) 530#define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb) 531#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags) 532#define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib) 533#define X0MEMATTR(RTX, N) (RTL_CHECKC1 (RTX, N, MEM).rtmem) 534#define X0REGATTR(RTX, N) (RTL_CHECKC1 (RTX, N, REG).rtreg) 535 536/* Access a '0' field with any type. */ 537#define X0ANY(RTX, N) RTL_CHECK1 (RTX, N, '0') 538 539#define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint) 540#define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint) 541#define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr) 542#define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx) 543#define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec) 544#define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype) 545#define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit) 546#define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree) 547#define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb) 548#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags) 549#define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib) 550 551#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M) 552#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C)) 553 554#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx) 555 556/* ACCESS MACROS for particular fields of insns. */ 557 558/* Determines whether X is an insn. */ 559#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i') 560 561/* Holds a unique number for each insn. 562 These are not necessarily sequentially increasing. */ 563#define INSN_UID(INSN) XINT (INSN, 0) 564 565/* Chain insns together in sequence. */ 566#define PREV_INSN(INSN) XEXP (INSN, 1) 567#define NEXT_INSN(INSN) XEXP (INSN, 2) 568 569#define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3) 570#define INSN_LOCATOR(INSN) XINT (INSN, 4) 571/* The body of an insn. */ 572#define PATTERN(INSN) XEXP (INSN, 5) 573 574/* Code number of instruction, from when it was recognized. 575 -1 means this instruction has not been recognized yet. */ 576#define INSN_CODE(INSN) XINT (INSN, 6) 577 578/* Set up in flow.c; empty before then. 579 Holds a chain of INSN_LIST rtx's whose first operands point at 580 previous insns with direct data-flow connections to this one. 581 That means that those insns set variables whose next use is in this insn. 582 They are always in the same basic block as this insn. */ 583#define LOG_LINKS(INSN) XEXP(INSN, 7) 584 585#define RTX_INTEGRATED_P(RTX) \ 586 (RTL_FLAG_CHECK8("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \ 587 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \ 588 NOTE)->integrated) 589#define RTX_UNCHANGING_P(RTX) \ 590 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging) 591#define RTX_FRAME_RELATED_P(RTX) \ 592 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \ 593 JUMP_INSN, BARRIER, SET)->frame_related) 594 595/* 1 if RTX is an insn that has been deleted. */ 596#define INSN_DELETED_P(RTX) \ 597 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \ 598 CODE_LABEL, BARRIER, NOTE)->volatil) 599 600/* 1 if RTX is a call to a const or pure function. */ 601#define CONST_OR_PURE_CALL_P(RTX) \ 602 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \ 603 EXPR_LIST)->unchanging) 604 605/* 1 if RTX is a call_insn for a sibling call. */ 606#define SIBLING_CALL_P(RTX) \ 607 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump) 608 609/* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */ 610#define INSN_ANNULLED_BRANCH_P(RTX) \ 611 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging) 612 613/* 1 if RTX is an insn that is dead code. Valid only for dead-code 614 elimination phase. */ 615#define INSN_DEAD_CODE_P(RTX) \ 616 (RTL_FLAG_CHECK3("INSN_DEAD_CODE_P", (RTX), INSN, CALL_INSN, JUMP_INSN)->in_struct) 617 618/* 1 if RTX is an insn in a delay slot and is from the target of the branch. 619 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be 620 executed if the branch is taken. For annulled branches with this bit 621 clear, the insn should be executed only if the branch is not taken. */ 622#define INSN_FROM_TARGET_P(RTX) \ 623 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct) 624 625#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4) 626 627#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0) 628 629/* Holds a list of notes on what this insn does to various REGs. 630 It is a chain of EXPR_LIST rtx's, where the second operand is the 631 chain pointer and the first operand is the REG being described. 632 The mode field of the EXPR_LIST contains not a real machine mode 633 but a value from enum reg_note. */ 634 635#define REG_NOTES(INSN) XEXP(INSN, 8) 636 637/* Don't forget to change reg_note_name in rtl.c. */ 638enum reg_note 639{ 640 /* The value in REG dies in this insn (i.e., it is not needed past 641 this insn). If REG is set in this insn, the REG_DEAD note may, 642 but need not, be omitted. */ 643 REG_DEAD = 1, 644 645 /* The REG is autoincremented or autodecremented. */ 646 REG_INC, 647 648 /* Describes the insn as a whole; it says that the insn sets a register 649 to a constant value or to be equivalent to a memory address. If the 650 register is spilled to the stack then the constant value should be 651 substituted for it. The contents of the REG_EQUIV is the constant 652 value or memory address, which may be different from the source of 653 the SET although it has the same value. A REG_EQUIV note may also 654 appear on an insn which copies a register parameter to a pseudo-register, 655 if there is a memory address which could be used to hold that 656 pseudo-register throughout the function. */ 657 REG_EQUIV, 658 659 /* Like REG_EQUIV except that the destination is only momentarily equal 660 to the specified rtx. Therefore, it cannot be used for substitution; 661 but it can be used for cse. */ 662 REG_EQUAL, 663 664 /* This insn copies the return-value of a library call out of the hard reg 665 for return values. This note is actually an INSN_LIST and it points to 666 the first insn involved in setting up arguments for the call. flow.c 667 uses this to delete the entire library call when its result is dead. */ 668 REG_RETVAL, 669 670 /* The inverse of REG_RETVAL: it goes on the first insn of the library call 671 and points at the one that has the REG_RETVAL. This note is also an 672 INSN_LIST. */ 673 REG_LIBCALL, 674 675 /* The register is always nonnegative during the containing loop. This is 676 used in branches so that decrement and branch instructions terminating 677 on zero can be matched. There must be an insn pattern in the md file 678 named `decrement_and_branch_until_zero' or else this will never be added 679 to any instructions. */ 680 REG_NONNEG, 681 682 /* There is no conflict *after this insn* between the register in the note 683 and the destination of this insn. */ 684 REG_NO_CONFLICT, 685 686 /* Identifies a register set in this insn and never used. */ 687 REG_UNUSED, 688 689 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0, 690 respectively. Normally, these are required to be consecutive insns, but 691 we permit putting a cc0-setting insn in the delay slot of a branch as 692 long as only one copy of the insn exists. In that case, these notes 693 point from one to the other to allow code generation to determine what 694 any require information and to properly update CC_STATUS. These notes 695 are INSN_LISTs. */ 696 REG_CC_SETTER, REG_CC_USER, 697 698 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the 699 CODE_LABEL contained in the REG_LABEL note is used by the insn. 700 This note is an INSN_LIST. */ 701 REG_LABEL, 702 703 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent 704 write-after-read and write-after-write dependencies respectively. 705 Data dependencies, which are the only type of LOG_LINK created by 706 flow, are represented by a 0 reg note kind. */ 707 REG_DEP_ANTI, REG_DEP_OUTPUT, 708 709 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs. 710 It has an integer value. For jumps, it is the probability that this is a 711 taken branch. For calls, it is the probability that this call won't 712 return. */ 713 REG_BR_PROB, 714 715 /* REG_VALUE_PROFILE is attached when the profile is read in to an insn 716 before that the code to profile the value is inserted. It contains 717 the results of profiling. */ 718 REG_VALUE_PROFILE, 719 720 /* Attached to a call insn; indicates that the call is malloc-like and 721 that the pointer returned cannot alias anything else. */ 722 REG_NOALIAS, 723 724 /* Used to optimize rtl generated by dynamic stack allocations for targets 725 where SETJMP_VIA_SAVE_AREA is true. */ 726 REG_SAVE_AREA, 727 728 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains 729 CONCAT of two integer value. First specifies the branch predictor 730 that added the note, second specifies the predicted hitrate of branch 731 in the same format as REG_BR_PROB note uses. */ 732 REG_BR_PRED, 733 734 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex 735 for DWARF to interpret what they imply. The attached rtx is used 736 instead of intuition. */ 737 REG_FRAME_RELATED_EXPR, 738 739 /* Indicates that REG holds the exception context for the function. 740 This context is shared by inline functions, so the code to acquire 741 the real exception context is delayed until after inlining. */ 742 REG_EH_CONTEXT, 743 744 /* Indicates what exception region an INSN belongs in. This is used to 745 indicate what region to which a call may throw. REGION 0 indicates 746 that a call cannot throw at all. REGION -1 indicates that it cannot 747 throw, nor will it execute a non-local goto. */ 748 REG_EH_REGION, 749 750 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */ 751 REG_SAVE_NOTE, 752 753 /* Indicates that this insn (which is part of the prologue) computes 754 a value which might not be used later, and if so it's OK to delete 755 the insn. Normally, deleting any insn in the prologue is an error. 756 At present the parameter is unused and set to (const_int 0). */ 757 REG_MAYBE_DEAD, 758 759 /* Indicates that a call does not return. */ 760 REG_NORETURN, 761 762 /* Indicates that an indirect jump is a non-local goto instead of a 763 computed goto. */ 764 REG_NON_LOCAL_GOTO, 765 766 /* This kind of note is generated at each to `setjmp', 767 and similar functions that can return twice. */ 768 REG_SETJMP, 769 770 /* Indicate calls that always returns. */ 771 REG_ALWAYS_RETURN, 772 773 /* Indicate that the memory load references a vtable. The expression 774 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */ 775 REG_VTABLE_REF 776}; 777 778/* The base value for branch probability notes. */ 779#define REG_BR_PROB_BASE 10000 780 781/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ 782#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) 783#define PUT_REG_NOTE_KIND(LINK, KIND) \ 784 PUT_MODE (LINK, (enum machine_mode) (KIND)) 785 786/* Names for REG_NOTE's in EXPR_LIST insn's. */ 787 788extern const char * const reg_note_name[]; 789#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)]) 790 791/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of 792 USE and CLOBBER expressions. 793 USE expressions list the registers filled with arguments that 794 are passed to the function. 795 CLOBBER expressions document the registers explicitly clobbered 796 by this CALL_INSN. 797 Pseudo registers can not be mentioned in this list. */ 798#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9) 799 800/* The label-number of a code-label. The assembler label 801 is made from `L' and the label-number printed in decimal. 802 Label numbers are unique in a compilation. */ 803#define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6) 804 805#define LINE_NUMBER NOTE 806 807/* In a NOTE that is a line number, this is a string for the file name that the 808 line is in. We use the same field to record block numbers temporarily in 809 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts 810 between ints and pointers if we use a different macro for the block number.) 811 */ 812 813/* Opaque data. */ 814#define NOTE_DATA(INSN) RTL_CHECKC1 (INSN, 4, NOTE) 815#define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE) 816#define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE) 817#define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE) 818#define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE) 819#define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE) 820#define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE) 821#define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE) 822 823/* In a NOTE that is a line number, this is the line number. 824 Other kinds of NOTEs are identified by negative numbers here. */ 825#define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE) 826 827/* Nonzero if INSN is a note marking the beginning of a basic block. */ 828#define NOTE_INSN_BASIC_BLOCK_P(INSN) \ 829 (GET_CODE (INSN) == NOTE \ 830 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK) 831 832/* Algorithm and flags for prediction. */ 833#define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8) 834#define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff) 835#define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS)) 836 837/* Codes that appear in the NOTE_LINE_NUMBER field 838 for kinds of notes that are not line numbers. 839 840 Notice that we do not try to use zero here for any of 841 the special note codes because sometimes the source line 842 actually can be zero! This happens (for example) when we 843 are generating code for the per-translation-unit constructor 844 and destructor routines for some C++ translation unit. 845 846 If you should change any of the following values, or if you 847 should add a new value here, don't forget to change the 848 note_insn_name array in rtl.c. */ 849 850enum insn_note 851{ 852 /* Keep all of these numbers negative. Adjust as needed. */ 853 NOTE_INSN_BIAS = -100, 854 855 /* This note is used to get rid of an insn 856 when it isn't safe to patch the insn out of the chain. */ 857 NOTE_INSN_DELETED, 858 859 /* These are used to mark the beginning and end of a lexical block. 860 See NOTE_BLOCK, identify_blocks and reorder_blocks. */ 861 NOTE_INSN_BLOCK_BEG, 862 NOTE_INSN_BLOCK_END, 863 864 /* These mark the extremes of a loop. */ 865 NOTE_INSN_LOOP_BEG, 866 NOTE_INSN_LOOP_END, 867 868 /* Generated at the place in a loop that `continue' jumps to. */ 869 NOTE_INSN_LOOP_CONT, 870 /* Generated at the start of a duplicated exit test. */ 871 NOTE_INSN_LOOP_VTOP, 872 873 /* Generated at the end of a conditional at the top of the loop. 874 This is used to perform a lame form of loop rotation in lieu 875 of actually understanding the loop structure. The note is 876 discarded after rotation is complete. */ 877 NOTE_INSN_LOOP_END_TOP_COND, 878 879 /* This kind of note is generated at the end of the function body, 880 just before the return insn or return label. In an optimizing 881 compilation it is deleted by the first jump optimization, after 882 enabling that optimizer to determine whether control can fall 883 off the end of the function body without a return statement. */ 884 NOTE_INSN_FUNCTION_END, 885 886 /* This marks the point immediately after the last prologue insn. */ 887 NOTE_INSN_PROLOGUE_END, 888 889 /* This marks the point immediately prior to the first epilogue insn. */ 890 NOTE_INSN_EPILOGUE_BEG, 891 892 /* Generated in place of user-declared labels when they are deleted. */ 893 NOTE_INSN_DELETED_LABEL, 894 895 /* This note indicates the start of the real body of the function, 896 i.e. the point just after all of the parms have been moved into 897 their homes, etc. */ 898 NOTE_INSN_FUNCTION_BEG, 899 900 /* These note where exception handling regions begin and end. 901 Uses NOTE_EH_HANDLER to identify the region in question. */ 902 NOTE_INSN_EH_REGION_BEG, 903 NOTE_INSN_EH_REGION_END, 904 905 /* Generated whenever a duplicate line number note is output. For example, 906 one is output after the end of an inline function, in order to prevent 907 the line containing the inline call from being counted twice in gcov. */ 908 NOTE_INSN_REPEATED_LINE_NUMBER, 909 910 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */ 911 NOTE_INSN_BASIC_BLOCK, 912 913 /* Record the expected value of a register at a location. Uses 914 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */ 915 NOTE_INSN_EXPECTED_VALUE, 916 917 /* Record a prediction. Uses NOTE_PREDICTION. */ 918 NOTE_INSN_PREDICTION, 919 920 NOTE_INSN_MAX 921}; 922 923/* Names for NOTE insn's other than line numbers. */ 924 925extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS]; 926#define GET_NOTE_INSN_NAME(NOTE_CODE) \ 927 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS]) 928 929/* The name of a label, in case it corresponds to an explicit label 930 in the input source code. */ 931#define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL) 932 933/* In jump.c, each label contains a count of the number 934 of LABEL_REFs that point at it, so unused labels can be deleted. */ 935#define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL) 936 937/* Labels carry a two-bit field composed of the ->jump and ->call 938 bits. This field indicates whether the label is an alternate 939 entry point, and if so, what kind. */ 940enum label_kind 941{ 942 LABEL_NORMAL = 0, /* ordinary label */ 943 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */ 944 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */ 945 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */ 946}; 947 948#if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007) 949 950/* Retrieve the kind of LABEL. */ 951#define LABEL_KIND(LABEL) __extension__ \ 952({ rtx const _label = (LABEL); \ 953 if (GET_CODE (_label) != CODE_LABEL) \ 954 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \ 955 __FUNCTION__); \ 956 (enum label_kind) ((_label->jump << 1) | _label->call); }) 957 958/* Set the kind of LABEL. */ 959#define SET_LABEL_KIND(LABEL, KIND) do { \ 960 rtx _label = (LABEL); \ 961 unsigned int _kind = (KIND); \ 962 if (GET_CODE (_label) != CODE_LABEL) \ 963 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \ 964 __FUNCTION__); \ 965 _label->jump = ((_kind >> 1) & 1); \ 966 _label->call = (_kind & 1); \ 967} while (0) 968 969#else 970 971/* Retrieve the kind of LABEL. */ 972#define LABEL_KIND(LABEL) \ 973 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call)) 974 975/* Set the kind of LABEL. */ 976#define SET_LABEL_KIND(LABEL, KIND) do { \ 977 rtx _label = (LABEL); \ 978 unsigned int _kind = (KIND); \ 979 _label->jump = ((_kind >> 1) & 1); \ 980 _label->call = (_kind & 1); \ 981} while (0) 982 983#endif /* rtl flag checking */ 984 985#define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL) 986 987/* The original regno this ADDRESSOF was built for. */ 988#define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF) 989 990/* The variable in the register we took the address of. */ 991#define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF) 992 993/* In jump.c, each JUMP_INSN can point to a label that it can jump to, 994 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can 995 be decremented and possibly the label can be deleted. */ 996#define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN) 997 998/* Once basic blocks are found in flow.c, 999 each CODE_LABEL starts a chain that goes through 1000 all the LABEL_REFs that jump to that label. 1001 The chain eventually winds up at the CODE_LABEL: it is circular. */ 1002#define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL) 1003 1004/* This is the field in the LABEL_REF through which the circular chain 1005 of references to a particular label is linked. 1006 This chain is set up in flow.c. */ 1007 1008#define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF) 1009 1010/* Once basic blocks are found in flow.c, 1011 Each LABEL_REF points to its containing instruction with this field. */ 1012 1013#define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF) 1014 1015/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds 1016 the number the register originally had; for a pseudo register turned into 1017 a hard reg this will hold the old pseudo register number. */ 1018 1019#define REGNO(RTX) XCUINT (RTX, 0, REG) 1020#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1) 1021 1022/* 1 if RTX is a reg or parallel that is the current function's return 1023 value. */ 1024#define REG_FUNCTION_VALUE_P(RTX) \ 1025 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated) 1026 1027/* 1 if RTX is a reg that corresponds to a variable declared by the user. */ 1028#define REG_USERVAR_P(RTX) \ 1029 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil) 1030 1031/* 1 if RTX is a reg that holds a pointer value. */ 1032#define REG_POINTER(RTX) \ 1033 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related) 1034 1035/* 1 if the given register REG corresponds to a hard register. */ 1036#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG))) 1037 1038/* 1 if the given register number REG_NO corresponds to a hard register. */ 1039#define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER) 1040 1041/* For a CONST_INT rtx, INTVAL extracts the integer. */ 1042 1043#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT) 1044 1045/* For a CONST_DOUBLE: 1046 For a DImode, there are two integers CONST_DOUBLE_LOW is the 1047 low-order word and ..._HIGH the high-order. 1048 For a float, there is a REAL_VALUE_TYPE structure, and 1049 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */ 1050#define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE) 1051#define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE) 1052#define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r)) 1053 1054/* For a CONST_VECTOR, return element #n. */ 1055#define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR) 1056 1057/* For a CONST_VECTOR, return the number of elements in a vector. */ 1058#define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR) 1059 1060/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. 1061 SUBREG_BYTE extracts the byte-number. */ 1062 1063#define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG) 1064#define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG) 1065 1066/* in rtlanal.c */ 1067extern unsigned int subreg_lsb (rtx); 1068extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode, 1069 unsigned int, enum machine_mode); 1070extern bool subreg_offset_representable_p (unsigned int, enum machine_mode, 1071 unsigned int, enum machine_mode); 1072extern unsigned int subreg_regno (rtx); 1073 1074/* 1 if RTX is a subreg containing a reg that is already known to be 1075 sign- or zero-extended from the mode of the subreg to the mode of 1076 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the 1077 extension. 1078 1079 When used as a LHS, is means that this extension must be done 1080 when assigning to SUBREG_REG. */ 1081 1082#define SUBREG_PROMOTED_VAR_P(RTX) \ 1083 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct) 1084 1085#define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \ 1086do { \ 1087 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \ 1088 if ((VAL) < 0) \ 1089 _rtx->volatil = 1; \ 1090 else { \ 1091 _rtx->volatil = 0; \ 1092 _rtx->unchanging = (VAL); \ 1093 } \ 1094} while (0) 1095#define SUBREG_PROMOTED_UNSIGNED_P(RTX) \ 1096 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \ 1097 ? -1 : (RTX)->unchanging) 1098 1099/* Access various components of an ASM_OPERANDS rtx. */ 1100 1101#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS) 1102#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS) 1103#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS) 1104#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS) 1105#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS) 1106#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS) 1107#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS) 1108#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \ 1109 XCVECEXP (RTX, 4, N, ASM_OPERANDS) 1110#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \ 1111 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0) 1112#define ASM_OPERANDS_INPUT_MODE(RTX, N) \ 1113 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS)) 1114#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS) 1115#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS) 1116 1117/* 1 if RTX is a mem and we should keep the alias set for this mem 1118 unchanged when we access a component. Set to 1, or example, when we 1119 are already in a non-addressable component of an aggregate. */ 1120#define MEM_KEEP_ALIAS_SET_P(RTX) \ 1121 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump) 1122 1123/* 1 if RTX is a mem or asm_operand for a volatile reference. */ 1124#define MEM_VOLATILE_P(RTX) \ 1125 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \ 1126 ASM_INPUT)->volatil) 1127 1128/* 1 if RTX is a mem that refers to an aggregate, either to the 1129 aggregate itself of to a field of the aggregate. If zero, RTX may 1130 or may not be such a reference. */ 1131#define MEM_IN_STRUCT_P(RTX) \ 1132 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct) 1133 1134/* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may 1135 not refer to a scalar. */ 1136#define MEM_SCALAR_P(RTX) \ 1137 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related) 1138 1139/* 1 if RTX is a mem that cannot trap. */ 1140#define MEM_NOTRAP_P(RTX) \ 1141 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call) 1142 1143/* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in 1144 RTX. Otherwise, vice versa. Use this macro only when you are 1145 *sure* that you know that the MEM is in a structure, or is a 1146 scalar. VAL is evaluated only once. */ 1147#define MEM_SET_IN_STRUCT_P(RTX, VAL) \ 1148do { \ 1149 if (VAL) \ 1150 { \ 1151 MEM_IN_STRUCT_P (RTX) = 1; \ 1152 MEM_SCALAR_P (RTX) = 0; \ 1153 } \ 1154 else \ 1155 { \ 1156 MEM_IN_STRUCT_P (RTX) = 0; \ 1157 MEM_SCALAR_P (RTX) = 1; \ 1158 } \ 1159} while (0) 1160 1161/* The memory attribute block. We provide access macros for each value 1162 in the block and provide defaults if none specified. */ 1163#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1) 1164 1165/* The register attribute block. We provide access macros for each value 1166 in the block and provide defaults if none specified. */ 1167#define REG_ATTRS(RTX) X0REGATTR (RTX, 2) 1168 1169/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias 1170 set, and may alias anything. Otherwise, the MEM can only alias 1171 MEMs in a conflicting alias set. This value is set in a 1172 language-dependent manner in the front-end, and should not be 1173 altered in the back-end. These set numbers are tested with 1174 alias_sets_conflict_p. */ 1175#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias) 1176 1177/* For a MEM rtx, the decl it is known to refer to, if it is known to 1178 refer to part of a DECL. It may also be a COMPONENT_REF. */ 1179#define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr) 1180 1181/* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a 1182 RTX that is always a CONST_INT. */ 1183#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset) 1184 1185/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that 1186 is always a CONST_INT. */ 1187#define MEM_SIZE(RTX) \ 1188(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \ 1189 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \ 1190 : 0) 1191 1192/* For a MEM rtx, the alignment in bits. We can use the alignment of the 1193 mode as a default when STRICT_ALIGNMENT, but not if not. */ 1194#define MEM_ALIGN(RTX) \ 1195(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \ 1196 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \ 1197 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT)) 1198 1199/* For a REG rtx, the decl it is known to refer to, if it is known to 1200 refer to part of a DECL. */ 1201#define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl) 1202 1203/* For a MEM rtx, the offset from the start of MEM_DECL, if known, as a 1204 RTX that is always a CONST_INT. */ 1205#define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset) 1206 1207/* Copy the attributes that apply to memory locations from RHS to LHS. */ 1208#define MEM_COPY_ATTRIBUTES(LHS, RHS) \ 1209 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \ 1210 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \ 1211 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \ 1212 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \ 1213 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \ 1214 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \ 1215 MEM_ATTRS (LHS) = MEM_ATTRS (RHS)) 1216 1217/* 1 if RTX is a label_ref to a label outside the loop containing the 1218 reference. */ 1219#define LABEL_OUTSIDE_LOOP_P(RTX) \ 1220 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct) 1221 1222/* 1 if RTX is a label_ref for a nonlocal label. */ 1223/* Likewise in an expr_list for a reg_label note. */ 1224#define LABEL_REF_NONLOCAL_P(RTX) \ 1225 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \ 1226 REG_LABEL)->volatil) 1227 1228/* 1 if RTX is a code_label that should always be considered to be needed. */ 1229#define LABEL_PRESERVE_P(RTX) \ 1230 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct) 1231 1232/* 1 if RTX is a reg that is used only in an exit test of a loop. */ 1233#define REG_LOOP_TEST_P(RTX) \ 1234 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct) 1235 1236/* During sched, 1 if RTX is an insn that must be scheduled together 1237 with the preceding insn. */ 1238#define SCHED_GROUP_P(RTX) \ 1239 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \ 1240 )->in_struct) 1241 1242/* For a SET rtx, SET_DEST is the place that is set 1243 and SET_SRC is the value it is set to. */ 1244#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER) 1245#define SET_SRC(RTX) XCEXP(RTX, 1, SET) 1246#define SET_IS_RETURN_P(RTX) \ 1247 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump) 1248 1249/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ 1250#define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF) 1251#define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF) 1252 1253/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base 1254 conditionally executing the code on, COND_EXEC_CODE is the code 1255 to execute if the condition is true. */ 1256#define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC) 1257#define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC) 1258 1259/* 1 if RTX is a symbol_ref that addresses this function's rtl 1260 constants pool. */ 1261#define CONSTANT_POOL_ADDRESS_P(RTX) \ 1262 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging) 1263 1264/* 1 if RTX is a symbol_ref that addresses a value in the file's 1265 tree constant pool. This information is private to varasm.c. */ 1266#define TREE_CONSTANT_POOL_ADDRESS_P(RTX) \ 1267 (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P", \ 1268 (RTX), SYMBOL_REF)->frame_related) 1269 1270/* Used if RTX is a symbol_ref, for machine-specific purposes. */ 1271#define SYMBOL_REF_FLAG(RTX) \ 1272 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil) 1273 1274/* 1 if RTX is a symbol_ref that has been the library function in 1275 emit_library_call. */ 1276#define SYMBOL_REF_USED(RTX) \ 1277 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used) 1278 1279/* 1 if RTX is a symbol_ref for a weak symbol. */ 1280#define SYMBOL_REF_WEAK(RTX) \ 1281 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated) 1282 1283/* The tree (decl or constant) associated with the symbol, or null. */ 1284#define SYMBOL_REF_DECL(RTX) X0TREE ((RTX), 2) 1285 1286/* A set of flags on a symbol_ref that are, in some respects, redundant with 1287 information derivable from the tree decl associated with this symbol. 1288 Except that we build a *lot* of SYMBOL_REFs that aren't associated with a 1289 decl. In some cases this is a bug. But beyond that, it's nice to cache 1290 this information to avoid recomputing it. Finally, this allows space for 1291 the target to store more than one bit of information, as with 1292 SYMBOL_REF_FLAG. */ 1293#define SYMBOL_REF_FLAGS(RTX) X0INT ((RTX), 1) 1294 1295/* These flags are common enough to be defined for all targets. They 1296 are computed by the default version of targetm.encode_section_info. */ 1297 1298/* Set if this symbol is a function. */ 1299#define SYMBOL_FLAG_FUNCTION (1 << 0) 1300#define SYMBOL_REF_FUNCTION_P(RTX) \ 1301 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0) 1302/* Set if targetm.binds_local_p is true. */ 1303#define SYMBOL_FLAG_LOCAL (1 << 1) 1304#define SYMBOL_REF_LOCAL_P(RTX) \ 1305 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0) 1306/* Set if targetm.in_small_data_p is true. */ 1307#define SYMBOL_FLAG_SMALL (1 << 2) 1308#define SYMBOL_REF_SMALL_P(RTX) \ 1309 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0) 1310/* The three-bit field at [5:3] is true for TLS variables; use 1311 SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model. */ 1312#define SYMBOL_FLAG_TLS_SHIFT 3 1313#define SYMBOL_REF_TLS_MODEL(RTX) \ 1314 ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7)) 1315/* Set if this symbol is not defined in this translation unit. */ 1316#define SYMBOL_FLAG_EXTERNAL (1 << 6) 1317#define SYMBOL_REF_EXTERNAL_P(RTX) \ 1318 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0) 1319 1320/* Subsequent bits are available for the target to use. */ 1321#define SYMBOL_FLAG_MACH_DEP_SHIFT 7 1322#define SYMBOL_FLAG_MACH_DEP (1 << SYMBOL_FLAG_MACH_DEP_SHIFT) 1323 1324/* Define a macro to look for REG_INC notes, 1325 but save time on machines where they never exist. */ 1326 1327#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1328#define FIND_REG_INC_NOTE(INSN, REG) \ 1329 ((REG) != NULL_RTX && REG_P ((REG)) \ 1330 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \ 1331 : find_reg_note ((INSN), REG_INC, (REG))) 1332#else 1333#define FIND_REG_INC_NOTE(INSN, REG) 0 1334#endif 1335 1336/* Indicate whether the machine has any sort of auto increment addressing. 1337 If not, we can avoid checking for REG_INC notes. */ 1338 1339#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1340#define AUTO_INC_DEC 1341#endif 1342 1343#ifndef HAVE_PRE_INCREMENT 1344#define HAVE_PRE_INCREMENT 0 1345#endif 1346 1347#ifndef HAVE_PRE_DECREMENT 1348#define HAVE_PRE_DECREMENT 0 1349#endif 1350 1351#ifndef HAVE_POST_INCREMENT 1352#define HAVE_POST_INCREMENT 0 1353#endif 1354 1355#ifndef HAVE_POST_DECREMENT 1356#define HAVE_POST_DECREMENT 0 1357#endif 1358 1359#ifndef HAVE_POST_MODIFY_DISP 1360#define HAVE_POST_MODIFY_DISP 0 1361#endif 1362 1363#ifndef HAVE_POST_MODIFY_REG 1364#define HAVE_POST_MODIFY_REG 0 1365#endif 1366 1367#ifndef HAVE_PRE_MODIFY_DISP 1368#define HAVE_PRE_MODIFY_DISP 0 1369#endif 1370 1371#ifndef HAVE_PRE_MODIFY_REG 1372#define HAVE_PRE_MODIFY_REG 0 1373#endif 1374 1375 1376/* Some architectures do not have complete pre/post increment/decrement 1377 instruction sets, or only move some modes efficiently. These macros 1378 allow us to tune autoincrement generation. */ 1379 1380#ifndef USE_LOAD_POST_INCREMENT 1381#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1382#endif 1383 1384#ifndef USE_LOAD_POST_DECREMENT 1385#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1386#endif 1387 1388#ifndef USE_LOAD_PRE_INCREMENT 1389#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1390#endif 1391 1392#ifndef USE_LOAD_PRE_DECREMENT 1393#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1394#endif 1395 1396#ifndef USE_STORE_POST_INCREMENT 1397#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1398#endif 1399 1400#ifndef USE_STORE_POST_DECREMENT 1401#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1402#endif 1403 1404#ifndef USE_STORE_PRE_INCREMENT 1405#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1406#endif 1407 1408#ifndef USE_STORE_PRE_DECREMENT 1409#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1410#endif 1411 1412/* Determine if the insn is a PHI node. */ 1413#define PHI_NODE_P(X) \ 1414 ((X) && GET_CODE (X) == INSN \ 1415 && GET_CODE (PATTERN (X)) == SET \ 1416 && GET_CODE (SET_SRC (PATTERN (X))) == PHI) 1417 1418/* Nonzero if we need to distinguish between the return value of this function 1419 and the return value of a function called by this function. This helps 1420 integrate.c. 1421 This is 1 until after the rtl generation pass. */ 1422extern int rtx_equal_function_value_matters; 1423 1424/* Nonzero when we are generating CONCATs. */ 1425extern int generating_concat_p; 1426 1427/* Generally useful functions. */ 1428 1429/* In expmed.c */ 1430extern int ceil_log2 (unsigned HOST_WIDE_INT); 1431 1432#define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C)) 1433 1434/* In builtins.c */ 1435extern rtx expand_builtin_expect_jump (tree, rtx, rtx); 1436extern void purge_builtin_constant_p (void); 1437 1438/* In explow.c */ 1439extern void set_stack_check_libfunc (rtx); 1440extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode); 1441extern rtx plus_constant_wide (rtx, HOST_WIDE_INT); 1442extern rtx plus_constant_for_output_wide (rtx, HOST_WIDE_INT); 1443extern void optimize_save_area_alloca (rtx); 1444 1445/* In emit-rtl.c */ 1446extern rtx gen_rtx (enum rtx_code, enum machine_mode, ...); 1447extern rtvec gen_rtvec (int, ...); 1448extern rtx copy_insn_1 (rtx); 1449extern rtx copy_insn (rtx); 1450extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode); 1451extern rtx emit_copy_of_insn_after (rtx, rtx); 1452extern void set_reg_attrs_from_mem (rtx, rtx); 1453extern void set_mem_attrs_from_reg (rtx, rtx); 1454extern void set_reg_attrs_for_parm (rtx, rtx); 1455extern int mem_expr_equal_p (tree, tree); 1456 1457/* In rtl.c */ 1458extern rtx rtx_alloc (RTX_CODE); 1459extern rtvec rtvec_alloc (int); 1460extern rtx copy_rtx (rtx); 1461extern void dump_rtx_statistics (void); 1462 1463/* In emit-rtl.c */ 1464extern rtx copy_rtx_if_shared (rtx); 1465 1466/* In rtl.c */ 1467extern rtx copy_most_rtx (rtx, rtx); 1468extern rtx shallow_copy_rtx (rtx); 1469extern int rtx_equal_p (rtx, rtx); 1470 1471/* In emit-rtl.c */ 1472extern rtvec gen_rtvec_v (int, rtx *); 1473extern rtx gen_reg_rtx (enum machine_mode); 1474extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int); 1475extern rtx gen_label_rtx (void); 1476extern int subreg_hard_regno (rtx, int); 1477extern rtx gen_lowpart_common (enum machine_mode, rtx); 1478extern rtx gen_lowpart (enum machine_mode, rtx); 1479 1480/* In cse.c */ 1481extern rtx gen_lowpart_if_possible (enum machine_mode, rtx); 1482 1483/* In emit-rtl.c */ 1484extern rtx gen_highpart (enum machine_mode, rtx); 1485extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx); 1486extern rtx gen_realpart (enum machine_mode, rtx); 1487extern rtx gen_imagpart (enum machine_mode, rtx); 1488extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode); 1489 1490/* In emit-rtl.c */ 1491extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode); 1492extern int subreg_lowpart_p (rtx); 1493extern unsigned int subreg_lowpart_offset (enum machine_mode, 1494 enum machine_mode); 1495extern unsigned int subreg_highpart_offset (enum machine_mode, 1496 enum machine_mode); 1497extern rtx make_safe_from (rtx, rtx); 1498extern rtx convert_memory_address (enum machine_mode, rtx); 1499extern rtx get_insns (void); 1500extern const char *get_insn_name (int); 1501extern rtx get_last_insn (void); 1502extern rtx get_last_insn_anywhere (void); 1503extern rtx get_first_nonnote_insn (void); 1504extern rtx get_last_nonnote_insn (void); 1505extern void start_sequence (void); 1506extern void push_to_sequence (rtx); 1507extern void end_sequence (void); 1508extern void push_to_full_sequence (rtx, rtx); 1509extern void end_full_sequence (rtx*, rtx*); 1510extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT, 1511 enum machine_mode); 1512 1513/* In varasm.c */ 1514extern rtx force_const_mem (enum machine_mode, rtx); 1515 1516/* In varasm.c */ 1517extern rtx get_pool_constant (rtx); 1518extern rtx get_pool_constant_mark (rtx, bool *); 1519extern enum machine_mode get_pool_mode (rtx); 1520extern rtx get_pool_constant_for_function (struct function *, rtx); 1521extern enum machine_mode get_pool_mode_for_function (struct function *, rtx); 1522extern int get_pool_offset (rtx); 1523extern rtx simplify_subtraction (rtx); 1524 1525/* In function.c */ 1526extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int); 1527extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int); 1528extern rtx assign_stack_temp_for_type (enum machine_mode, 1529 HOST_WIDE_INT, int, tree); 1530extern rtx assign_temp (tree, int, int, int); 1531 1532/* In emit-rtl.c */ 1533extern rtx emit_insn_before (rtx, rtx); 1534extern rtx emit_insn_before_noloc (rtx, rtx); 1535extern rtx emit_insn_before_setloc (rtx, rtx, int); 1536extern rtx emit_jump_insn_before (rtx, rtx); 1537extern rtx emit_jump_insn_before_noloc (rtx, rtx); 1538extern rtx emit_jump_insn_before_setloc (rtx, rtx, int); 1539extern rtx emit_call_insn_before (rtx, rtx); 1540extern rtx emit_call_insn_before_noloc (rtx, rtx); 1541extern rtx emit_call_insn_before_setloc (rtx, rtx, int); 1542extern rtx emit_barrier_before (rtx); 1543extern rtx emit_label_before (rtx, rtx); 1544extern rtx emit_note_before (int, rtx); 1545extern rtx emit_insn_after (rtx, rtx); 1546extern rtx emit_insn_after_noloc (rtx, rtx); 1547extern rtx emit_insn_after_setloc (rtx, rtx, int); 1548extern rtx emit_jump_insn_after (rtx, rtx); 1549extern rtx emit_jump_insn_after_noloc (rtx, rtx); 1550extern rtx emit_jump_insn_after_setloc (rtx, rtx, int); 1551extern rtx emit_call_insn_after (rtx, rtx); 1552extern rtx emit_call_insn_after_noloc (rtx, rtx); 1553extern rtx emit_call_insn_after_setloc (rtx, rtx, int); 1554extern rtx emit_barrier_after (rtx); 1555extern rtx emit_label_after (rtx, rtx); 1556extern rtx emit_note_after (int, rtx); 1557extern rtx emit_note_copy_after (rtx, rtx); 1558extern rtx emit_insn (rtx); 1559extern rtx emit_jump_insn (rtx); 1560extern rtx emit_call_insn (rtx); 1561extern rtx emit_label (rtx); 1562extern rtx emit_barrier (void); 1563extern rtx emit_note (int); 1564extern rtx emit_note_copy (rtx); 1565extern rtx emit_line_note (location_t); 1566extern rtx make_insn_raw (rtx); 1567extern void add_function_usage_to (rtx, rtx); 1568extern rtx last_call_insn (void); 1569extern rtx previous_insn (rtx); 1570extern rtx next_insn (rtx); 1571extern rtx prev_nonnote_insn (rtx); 1572extern rtx next_nonnote_insn (rtx); 1573extern rtx prev_real_insn (rtx); 1574extern rtx next_real_insn (rtx); 1575extern rtx prev_active_insn (rtx); 1576extern rtx next_active_insn (rtx); 1577extern int active_insn_p (rtx); 1578extern rtx prev_label (rtx); 1579extern rtx next_label (rtx); 1580extern rtx next_cc0_user (rtx); 1581extern rtx prev_cc0_setter (rtx); 1582 1583/* In cfglayout.c */ 1584extern tree choose_inner_scope (tree, tree); 1585extern int insn_line (rtx); 1586extern const char * insn_file (rtx); 1587extern int locator_line (int); 1588extern const char * locator_file (int); 1589extern int prologue_locator, epilogue_locator; 1590 1591/* In jump.c */ 1592extern enum rtx_code reverse_condition (enum rtx_code); 1593extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code); 1594extern enum rtx_code swap_condition (enum rtx_code); 1595extern enum rtx_code unsigned_condition (enum rtx_code); 1596extern enum rtx_code signed_condition (enum rtx_code); 1597extern void mark_jump_label (rtx, rtx, int); 1598extern void cleanup_barriers (void); 1599 1600/* In jump.c */ 1601extern bool squeeze_notes (rtx *, rtx *); 1602extern rtx delete_related_insns (rtx); 1603extern void delete_jump (rtx); 1604extern void delete_barrier (rtx); 1605extern rtx get_label_before (rtx); 1606extern rtx get_label_after (rtx); 1607extern rtx follow_jumps (rtx); 1608 1609/* In recog.c */ 1610extern rtx *find_constant_term_loc (rtx *); 1611 1612/* In emit-rtl.c */ 1613extern rtx try_split (rtx, rtx, int); 1614extern int split_branch_probability; 1615 1616/* In unknown file */ 1617extern rtx split_insns (rtx, rtx); 1618 1619/* In simplify-rtx.c */ 1620extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx, 1621 enum machine_mode); 1622extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx, 1623 rtx); 1624extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode, 1625 enum machine_mode, rtx, rtx, rtx); 1626extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode, 1627 rtx, rtx); 1628extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx); 1629extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx, 1630 enum machine_mode); 1631extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode, 1632 enum machine_mode, rtx, rtx, rtx); 1633extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode, 1634 enum machine_mode, rtx, rtx); 1635extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode, 1636 unsigned int); 1637extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode, 1638 unsigned int); 1639extern rtx simplify_replace_rtx (rtx, rtx, rtx); 1640extern rtx simplify_rtx (rtx); 1641extern rtx avoid_constant_pool_reference (rtx); 1642 1643/* In function.c */ 1644extern rtx gen_mem_addressof (rtx, tree, int); 1645 1646/* In regclass.c */ 1647extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int, 1648 bool); 1649 1650/* In emit-rtl.c */ 1651extern rtx set_unique_reg_note (rtx, enum reg_note, rtx); 1652 1653/* Functions in rtlanal.c */ 1654 1655/* Single set is implemented as macro for performance reasons. */ 1656#define single_set(I) (INSN_P (I) \ 1657 ? (GET_CODE (PATTERN (I)) == SET \ 1658 ? PATTERN (I) : single_set_1 (I)) \ 1659 : NULL_RTX) 1660#define single_set_1(I) single_set_2 (I, PATTERN (I)) 1661 1662/* Structure used for passing data to REPLACE_LABEL. */ 1663typedef struct replace_label_data 1664{ 1665 rtx r1; 1666 rtx r2; 1667 bool update_label_nuses; 1668} replace_label_data; 1669 1670extern int rtx_addr_can_trap_p (rtx); 1671extern bool nonzero_address_p (rtx); 1672extern int rtx_unstable_p (rtx); 1673extern int rtx_varies_p (rtx, int); 1674extern int rtx_addr_varies_p (rtx, int); 1675extern HOST_WIDE_INT get_integer_term (rtx); 1676extern rtx get_related_value (rtx); 1677extern rtx get_jump_table_offset (rtx, rtx *); 1678extern int global_reg_mentioned_p (rtx); 1679extern int reg_mentioned_p (rtx, rtx); 1680extern int count_occurrences (rtx, rtx, int); 1681extern int reg_referenced_p (rtx, rtx); 1682extern int reg_used_between_p (rtx, rtx, rtx); 1683extern int reg_referenced_between_p (rtx, rtx, rtx); 1684extern int reg_set_between_p (rtx, rtx, rtx); 1685extern int regs_set_between_p (rtx, rtx, rtx); 1686extern int commutative_operand_precedence (rtx); 1687extern int swap_commutative_operands_p (rtx, rtx); 1688extern int modified_between_p (rtx, rtx, rtx); 1689extern int no_labels_between_p (rtx, rtx); 1690extern int no_jumps_between_p (rtx, rtx); 1691extern int modified_in_p (rtx, rtx); 1692extern int insn_dependent_p (rtx, rtx); 1693extern int reg_set_p (rtx, rtx); 1694extern rtx single_set_2 (rtx, rtx); 1695extern int multiple_sets (rtx); 1696extern int set_noop_p (rtx); 1697extern int noop_move_p (rtx); 1698extern rtx find_last_value (rtx, rtx *, rtx, int); 1699extern int refers_to_regno_p (unsigned int, unsigned int, rtx, rtx *); 1700extern int reg_overlap_mentioned_p (rtx, rtx); 1701extern rtx set_of (rtx, rtx); 1702extern void note_stores (rtx, void (*) (rtx, rtx, void *), void *); 1703extern void note_uses (rtx *, void (*) (rtx *, void *), void *); 1704extern rtx reg_set_last (rtx, rtx); 1705extern int dead_or_set_p (rtx, rtx); 1706extern int dead_or_set_regno_p (rtx, unsigned int); 1707extern rtx find_reg_note (rtx, enum reg_note, rtx); 1708extern rtx find_regno_note (rtx, enum reg_note, unsigned int); 1709extern rtx find_reg_equal_equiv_note (rtx); 1710extern int find_reg_fusage (rtx, enum rtx_code, rtx); 1711extern int find_regno_fusage (rtx, enum rtx_code, unsigned int); 1712extern int pure_call_p (rtx); 1713extern void remove_note (rtx, rtx); 1714extern int side_effects_p (rtx); 1715extern int volatile_refs_p (rtx); 1716extern int volatile_insn_p (rtx); 1717extern int may_trap_p (rtx); 1718extern int inequality_comparisons_p (rtx); 1719extern rtx replace_rtx (rtx, rtx, rtx); 1720extern rtx replace_regs (rtx, rtx *, unsigned int, int); 1721extern int replace_label (rtx *, void *); 1722extern int rtx_referenced_p (rtx, rtx); 1723extern bool tablejump_p (rtx, rtx *, rtx *); 1724extern int computed_jump_p (rtx); 1725typedef int (*rtx_function) (rtx *, void *); 1726extern int for_each_rtx (rtx *, rtx_function, void *); 1727extern rtx regno_use_in (unsigned int, rtx); 1728extern int auto_inc_p (rtx); 1729extern int in_expr_list_p (rtx, rtx); 1730extern void remove_node_from_expr_list (rtx, rtx *); 1731extern int insns_safe_to_move_p (rtx, rtx, rtx *); 1732extern int loc_mentioned_in_p (rtx *, rtx); 1733extern rtx find_first_parameter_load (rtx, rtx); 1734extern bool keep_with_call_p (rtx); 1735extern bool label_is_jump_target_p (rtx, rtx); 1736 1737/* flow.c */ 1738 1739extern rtx find_use_as_address (rtx, rtx, HOST_WIDE_INT); 1740 1741/* lists.c */ 1742 1743void free_EXPR_LIST_list (rtx *); 1744void free_INSN_LIST_list (rtx *); 1745void free_EXPR_LIST_node (rtx); 1746void free_INSN_LIST_node (rtx); 1747rtx alloc_INSN_LIST (rtx, rtx); 1748rtx alloc_EXPR_LIST (int, rtx, rtx); 1749 1750/* regclass.c */ 1751 1752/* Maximum number of parallel sets and clobbers in any insn in this fn. 1753 Always at least 3, since the combiner could put that many together 1754 and we want this to remain correct for all the remaining passes. */ 1755 1756extern int max_parallel; 1757 1758/* Free up register info memory. */ 1759extern void free_reg_info (void); 1760 1761/* recog.c */ 1762extern int asm_noperands (rtx); 1763extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **, 1764 enum machine_mode *); 1765 1766extern enum reg_class reg_preferred_class (int); 1767extern enum reg_class reg_alternate_class (int); 1768 1769extern rtx get_first_nonparm_insn (void); 1770 1771extern void split_all_insns (int); 1772extern void split_all_insns_noflow (void); 1773 1774#define MAX_SAVED_CONST_INT 64 1775extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; 1776 1777#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT]) 1778#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1]) 1779#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2]) 1780#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1]) 1781extern GTY(()) rtx const_true_rtx; 1782 1783extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; 1784 1785/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the 1786 same as VOIDmode. */ 1787 1788#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) 1789 1790/* Likewise, for the constants 1 and 2. */ 1791 1792#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) 1793#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) 1794 1795/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg 1796 is used to represent the frame pointer. This is because the 1797 hard frame pointer and the automatic variables are separated by an amount 1798 that cannot be determined until after register allocation. We can assume 1799 that in this case ELIMINABLE_REGS will be defined, one action of which 1800 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ 1801#ifndef HARD_FRAME_POINTER_REGNUM 1802#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM 1803#endif 1804 1805/* Index labels for global_rtl. */ 1806enum global_rtl_index 1807{ 1808 GR_PC, 1809 GR_CC0, 1810 GR_STACK_POINTER, 1811 GR_FRAME_POINTER, 1812/* For register elimination to work properly these hard_frame_pointer_rtx, 1813 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to 1814 the same register. */ 1815#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1816 GR_ARG_POINTER = GR_FRAME_POINTER, 1817#endif 1818#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM 1819 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER, 1820#else 1821 GR_HARD_FRAME_POINTER, 1822#endif 1823#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM 1824#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1825 GR_ARG_POINTER = GR_HARD_FRAME_POINTER, 1826#else 1827 GR_ARG_POINTER, 1828#endif 1829#endif 1830 GR_VIRTUAL_INCOMING_ARGS, 1831 GR_VIRTUAL_STACK_ARGS, 1832 GR_VIRTUAL_STACK_DYNAMIC, 1833 GR_VIRTUAL_OUTGOING_ARGS, 1834 GR_VIRTUAL_CFA, 1835 1836 GR_MAX 1837}; 1838 1839/* Pointers to standard pieces of rtx are stored here. */ 1840extern GTY(()) rtx global_rtl[GR_MAX]; 1841 1842/* Standard pieces of rtx, to be substituted directly into things. */ 1843#define pc_rtx (global_rtl[GR_PC]) 1844#define cc0_rtx (global_rtl[GR_CC0]) 1845 1846/* All references to certain hard regs, except those created 1847 by allocating pseudo regs into them (when that's possible), 1848 go through these unique rtx objects. */ 1849#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER]) 1850#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER]) 1851#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER]) 1852#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER]) 1853 1854extern GTY(()) rtx pic_offset_table_rtx; 1855extern GTY(()) rtx static_chain_rtx; 1856extern GTY(()) rtx static_chain_incoming_rtx; 1857extern GTY(()) rtx return_address_pointer_rtx; 1858 1859/* Include the RTL generation functions. */ 1860 1861#ifndef NO_GENRTL_H 1862#include "genrtl.h" 1863#endif 1864 1865/* There are some RTL codes that require special attention; the 1866 generation functions included above do the raw handling. If you 1867 add to this list, modify special_rtx in gengenrtl.c as well. You 1868 should also modify gen_rtx to use the special function. */ 1869 1870extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT); 1871extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec); 1872extern rtx gen_raw_REG (enum machine_mode, int); 1873extern rtx gen_rtx_REG (enum machine_mode, unsigned); 1874extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int); 1875extern rtx gen_rtx_MEM (enum machine_mode, rtx); 1876 1877extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx); 1878 1879/* We need the cast here to ensure that we get the same result both with 1880 and without prototypes. */ 1881#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N)) 1882 1883/* Virtual registers are used during RTL generation to refer to locations into 1884 the stack frame when the actual location isn't known until RTL generation 1885 is complete. The routine instantiate_virtual_regs replaces these with 1886 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus 1887 a constant. */ 1888 1889#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) 1890 1891/* This points to the first word of the incoming arguments passed on the stack, 1892 either by the caller or by the callee when pretending it was passed by the 1893 caller. */ 1894 1895#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS]) 1896 1897#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) 1898 1899/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first 1900 variable on the stack. Otherwise, it points to the first variable on 1901 the stack. */ 1902 1903#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS]) 1904 1905#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) 1906 1907/* This points to the location of dynamically-allocated memory on the stack 1908 immediately after the stack pointer has been adjusted by the amount 1909 desired. */ 1910 1911#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC]) 1912 1913#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) 1914 1915/* This points to the location in the stack at which outgoing arguments should 1916 be written when the stack is pre-pushed (arguments pushed using push 1917 insns always use sp). */ 1918 1919#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS]) 1920 1921#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) 1922 1923/* This points to the Canonical Frame Address of the function. This 1924 should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET, 1925 but is calculated relative to the arg pointer for simplicity; the 1926 frame pointer nor stack pointer are necessarily fixed relative to 1927 the CFA until after reload. */ 1928 1929#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA]) 1930 1931#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4) 1932 1933#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4) 1934 1935/* Nonzero if REGNUM is a pointer into the stack frame. */ 1936#define REGNO_PTR_FRAME_P(REGNUM) \ 1937 ((REGNUM) == STACK_POINTER_REGNUM \ 1938 || (REGNUM) == FRAME_POINTER_REGNUM \ 1939 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \ 1940 || (REGNUM) == ARG_POINTER_REGNUM \ 1941 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \ 1942 && (REGNUM) <= LAST_VIRTUAL_REGISTER)) 1943 1944/* REGNUM never really appearing in the INSN stream. */ 1945#define INVALID_REGNUM (~(unsigned int) 0) 1946 1947extern rtx output_constant_def (tree, int); 1948extern rtx lookup_constant_def (tree); 1949 1950/* Called from integrate.c when a deferred constant is inlined. */ 1951extern void notice_rtl_inlining_of_deferred_constant (void); 1952 1953/* Nonzero after the second flow pass has completed. 1954 Set to 1 or 0 by toplev.c */ 1955extern int flow2_completed; 1956 1957/* Nonzero after end of reload pass. 1958 Set to 1 or 0 by reload1.c. */ 1959 1960extern int reload_completed; 1961 1962/* Nonzero after thread_prologue_and_epilogue_insns has run. */ 1963extern int epilogue_completed; 1964 1965/* Set to 1 while reload_as_needed is operating. 1966 Required by some machines to handle any generated moves differently. */ 1967 1968extern int reload_in_progress; 1969 1970/* If this is nonzero, we do not bother generating VOLATILE 1971 around volatile memory references, and we are willing to 1972 output indirect addresses. If cse is to follow, we reject 1973 indirect addresses so a useful potential cse is generated; 1974 if it is used only once, instruction combination will produce 1975 the same indirect address eventually. */ 1976extern int cse_not_expected; 1977 1978/* Set to nonzero before life analysis to indicate that it is unsafe to 1979 generate any new pseudo registers. */ 1980extern int no_new_pseudos; 1981 1982/* Translates rtx code to tree code, for those codes needed by 1983 REAL_ARITHMETIC. The function returns an int because the caller may not 1984 know what `enum tree_code' means. */ 1985 1986extern int rtx_to_tree_code (enum rtx_code); 1987 1988/* In cse.c */ 1989struct cse_basic_block_data; 1990 1991/* Return the right cost to give to an operation 1992 to make the cost of the corresponding register-to-register instruction 1993 N times that of a fast register-to-register instruction. */ 1994#define COSTS_N_INSNS(N) ((N) * 4) 1995 1996/* Maximum cost of an rtl expression. This value has the special meaning 1997 not to use an rtx with this cost under any circumstances. */ 1998#define MAX_COST INT_MAX 1999 2000extern int rtx_cost (rtx, enum rtx_code); 2001extern int address_cost (rtx, enum machine_mode); 2002extern int delete_trivially_dead_insns (rtx, int); 2003#ifdef BUFSIZ 2004extern int cse_main (rtx, int, int, FILE *); 2005#endif 2006extern void cse_end_of_basic_block (rtx, struct cse_basic_block_data *, 2007 int, int, int); 2008extern void cse_condition_code_reg (void); 2009 2010/* In jump.c */ 2011extern int comparison_dominates_p (enum rtx_code, enum rtx_code); 2012extern int condjump_p (rtx); 2013extern int any_condjump_p (rtx); 2014extern int any_uncondjump_p (rtx); 2015extern int safe_to_remove_jump_p (rtx); 2016extern rtx pc_set (rtx); 2017extern rtx condjump_label (rtx); 2018extern int simplejump_p (rtx); 2019extern int returnjump_p (rtx); 2020extern int onlyjump_p (rtx); 2021extern int only_sets_cc0_p (rtx); 2022extern int sets_cc0_p (rtx); 2023extern int invert_jump_1 (rtx, rtx); 2024extern int invert_jump (rtx, rtx, int); 2025extern int rtx_renumbered_equal_p (rtx, rtx); 2026extern int true_regnum (rtx); 2027extern unsigned int reg_or_subregno (rtx); 2028extern int redirect_jump_1 (rtx, rtx); 2029extern int redirect_jump (rtx, rtx, int); 2030extern void rebuild_jump_labels (rtx); 2031extern enum rtx_code reversed_comparison_code (rtx, rtx); 2032extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, 2033 rtx, rtx, rtx); 2034extern void delete_for_peephole (rtx, rtx); 2035extern int condjump_in_parallel_p (rtx); 2036extern void never_reached_warning (rtx, rtx); 2037extern void purge_line_number_notes (rtx); 2038extern void copy_loop_headers (rtx); 2039 2040/* In emit-rtl.c. */ 2041extern int max_reg_num (void); 2042extern int max_label_num (void); 2043extern int get_first_label_num (void); 2044extern void delete_insns_since (rtx); 2045extern void mark_reg_pointer (rtx, int); 2046extern void mark_user_reg (rtx); 2047extern void reset_used_flags (rtx); 2048extern void set_used_flags (rtx); 2049extern void reorder_insns (rtx, rtx, rtx); 2050extern void reorder_insns_nobb (rtx, rtx, rtx); 2051extern int get_max_uid (void); 2052extern int in_sequence_p (void); 2053extern void force_next_line_note (void); 2054extern void init_emit (void); 2055extern void init_emit_once (int); 2056extern void push_topmost_sequence (void); 2057extern void pop_topmost_sequence (void); 2058extern int subreg_realpart_p (rtx); 2059extern void reverse_comparison (rtx); 2060extern void set_new_first_and_last_insn (rtx, rtx); 2061extern void set_new_last_label_num (int); 2062extern void unshare_all_rtl_again (rtx); 2063extern void unshare_all_rtl_in_chain (rtx); 2064extern void verify_rtl_sharing (void); 2065extern void set_first_insn (rtx); 2066extern void set_last_insn (rtx); 2067extern void link_cc0_insns (rtx); 2068extern void add_insn (rtx); 2069extern void add_insn_before (rtx, rtx); 2070extern void add_insn_after (rtx, rtx); 2071extern void remove_insn (rtx); 2072extern void reorder_insns_with_line_notes (rtx, rtx, rtx); 2073extern void emit_insn_after_with_line_notes (rtx, rtx, rtx); 2074extern enum rtx_code classify_insn (rtx); 2075extern rtx emit (rtx); 2076/* Query and clear/ restore no_line_numbers. This is used by the 2077 switch / case handling in stmt.c to give proper line numbers in 2078 warnings about unreachable code. */ 2079int force_line_numbers (void); 2080void restore_line_number_status (int old_value); 2081extern void renumber_insns (FILE *); 2082extern void remove_unnecessary_notes (void); 2083extern rtx delete_insn (rtx); 2084extern void delete_insn_chain (rtx, rtx); 2085extern rtx unlink_insn_chain (rtx, rtx); 2086extern rtx delete_insn_and_edges (rtx); 2087extern void delete_insn_chain_and_edges (rtx, rtx); 2088 2089/* In combine.c */ 2090extern int combine_instructions (rtx, unsigned int); 2091extern unsigned int extended_count (rtx, enum machine_mode, int); 2092extern rtx remove_death (unsigned int, rtx); 2093#ifdef BUFSIZ 2094extern void dump_combine_stats (FILE *); 2095extern void dump_combine_total_stats (FILE *); 2096#endif 2097/* In web.c */ 2098extern void web_main (void); 2099 2100/* In sched.c. */ 2101#ifdef BUFSIZ 2102extern void schedule_insns (FILE *); 2103extern void schedule_ebbs (FILE *); 2104#endif 2105extern void fix_sched_param (const char *, const char *); 2106 2107/* In print-rtl.c */ 2108extern const char *print_rtx_head; 2109extern void debug_rtx (rtx); 2110extern void debug_rtx_list (rtx, int); 2111extern void debug_rtx_range (rtx, rtx); 2112extern rtx debug_rtx_find (rtx, int); 2113#ifdef BUFSIZ 2114extern void print_mem_expr (FILE *, tree); 2115extern void print_rtl (FILE *, rtx); 2116extern void print_simple_rtl (FILE *, rtx); 2117extern int print_rtl_single (FILE *, rtx); 2118extern void print_inline_rtx (FILE *, rtx, int); 2119#endif 2120 2121/* In loop.c */ 2122extern void init_loop (void); 2123extern rtx libcall_other_reg (rtx, rtx); 2124#ifdef BUFSIZ 2125extern void loop_optimize (rtx, FILE *, int); 2126#endif 2127extern void branch_target_load_optimize (rtx, bool); 2128extern void record_excess_regs (rtx, rtx, rtx *); 2129 2130/* In function.c */ 2131extern void reposition_prologue_and_epilogue_notes (rtx); 2132extern void thread_prologue_and_epilogue_insns (rtx); 2133extern int prologue_epilogue_contains (rtx); 2134extern int sibcall_epilogue_contains (rtx); 2135extern void preserve_rtl_expr_result (rtx); 2136extern void mark_temp_addr_taken (rtx); 2137extern void update_temp_slot_address (rtx, rtx); 2138extern void purge_addressof (rtx); 2139extern void purge_hard_subreg_sets (rtx); 2140 2141/* In stmt.c */ 2142extern void set_file_and_line_for_stmt (location_t); 2143extern void expand_null_return (void); 2144extern void expand_naked_return (void); 2145extern void emit_jump (rtx); 2146extern int preserve_subexpressions_p (void); 2147 2148/* In expr.c */ 2149extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT, 2150 unsigned int, int); 2151 2152/* In flow.c */ 2153extern void recompute_reg_usage (rtx, int); 2154extern int initialize_uninitialized_subregs (void); 2155extern void delete_dead_jumptables (void); 2156#ifdef BUFSIZ 2157extern void print_rtl_with_bb (FILE *, rtx); 2158extern void dump_flow_info (FILE *); 2159#endif 2160 2161/* In expmed.c */ 2162extern void init_expmed (void); 2163extern void expand_inc (rtx, rtx); 2164extern void expand_dec (rtx, rtx); 2165extern rtx expand_mult_highpart (enum machine_mode, rtx, 2166 unsigned HOST_WIDE_INT, rtx, int, int); 2167 2168/* In gcse.c */ 2169extern bool can_copy_p (enum machine_mode); 2170extern rtx fis_get_condition (rtx); 2171#ifdef BUFSIZ 2172extern int gcse_main (rtx, FILE *); 2173extern int bypass_jumps (FILE *); 2174#endif 2175 2176/* In global.c */ 2177extern void mark_elimination (int, int); 2178#ifdef BUFSIZ 2179extern int global_alloc (FILE *); 2180extern void dump_global_regs (FILE *); 2181#endif 2182#ifdef HARD_CONST 2183/* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */ 2184extern void retry_global_alloc (int, HARD_REG_SET); 2185#endif 2186extern void build_insn_chain (rtx); 2187 2188/* In regclass.c */ 2189extern int reg_classes_intersect_p (enum reg_class, enum reg_class); 2190extern int reg_class_subset_p (enum reg_class, enum reg_class); 2191extern void globalize_reg (int); 2192extern void init_reg_modes_once (void); 2193extern void init_regs (void); 2194extern void init_fake_stack_mems (void); 2195extern void init_reg_sets (void); 2196extern void regset_release_memory (void); 2197extern void regclass_init (void); 2198extern void regclass (rtx, int, FILE *); 2199extern void reg_scan (rtx, unsigned int, int); 2200extern void reg_scan_update (rtx, rtx, unsigned int); 2201extern void fix_register (const char *, int, int); 2202extern void init_subregs_of_mode (void); 2203extern void record_subregs_of_mode (rtx); 2204#ifdef HARD_CONST 2205extern void cannot_change_mode_set_regs (HARD_REG_SET *, 2206 enum machine_mode, unsigned int); 2207#endif 2208extern bool invalid_mode_change_p (unsigned int, enum reg_class, 2209 enum machine_mode); 2210 2211extern int delete_null_pointer_checks (rtx); 2212 2213/* In regmove.c */ 2214#ifdef BUFSIZ 2215extern void regmove_optimize (rtx, int, FILE *); 2216#endif 2217extern void combine_stack_adjustments (void); 2218 2219/* In reorg.c */ 2220#ifdef BUFSIZ 2221extern void dbr_schedule (rtx, FILE *); 2222#endif 2223 2224/* In local-alloc.c */ 2225#ifdef BUFSIZ 2226extern void dump_local_alloc (FILE *); 2227#endif 2228extern int local_alloc (void); 2229extern int function_invariant_p (rtx); 2230 2231/* In profile.c */ 2232extern void init_branch_prob (void); 2233extern void branch_prob (void); 2234extern void end_branch_prob (void); 2235 2236/* In reg-stack.c */ 2237#ifdef BUFSIZ 2238extern bool reg_to_stack (rtx, FILE *); 2239#endif 2240 2241/* In calls.c */ 2242enum libcall_type 2243{ 2244 LCT_NORMAL = 0, 2245 LCT_CONST = 1, 2246 LCT_PURE = 2, 2247 LCT_CONST_MAKE_BLOCK = 3, 2248 LCT_PURE_MAKE_BLOCK = 4, 2249 LCT_NORETURN = 5, 2250 LCT_THROW = 6, 2251 LCT_ALWAYS_RETURN = 7, 2252 LCT_RETURNS_TWICE = 8 2253}; 2254 2255extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int, 2256 ...); 2257extern rtx emit_library_call_value (rtx, rtx, enum libcall_type, 2258 enum machine_mode, int, ...); 2259 2260/* In unroll.c */ 2261extern int set_dominates_use (int, int, int, rtx, rtx); 2262 2263/* In varasm.c */ 2264extern int in_data_section (void); 2265extern void init_varasm_once (void); 2266 2267/* In rtl.c */ 2268extern void init_rtl (void); 2269extern void traverse_md_constants (int (*) (void **, void *), void *); 2270struct md_constant { char *name, *value; }; 2271 2272#ifdef BUFSIZ 2273extern int read_skip_spaces (FILE *); 2274extern rtx read_rtx (FILE *); 2275#endif 2276 2277extern const char *read_rtx_filename; 2278extern int read_rtx_lineno; 2279 2280/* Redefine abort to report an internal error w/o coredump, and 2281 reporting the location of the error in the source file. This logic 2282 is duplicated in rtl.h and tree.h because every file that needs the 2283 special abort includes one or both. toplev.h gets too few files, 2284 system.h gets too many. */ 2285 2286extern void fancy_abort (const char *, int, const char *) 2287 ATTRIBUTE_NORETURN; 2288#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__) 2289 2290/* In alias.c */ 2291extern void clear_reg_alias_info (rtx); 2292extern rtx canon_rtx (rtx); 2293extern int true_dependence (rtx, enum machine_mode, rtx, int (*)(rtx, int)); 2294extern rtx get_addr (rtx); 2295extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx, 2296 int (*)(rtx, int)); 2297extern int read_dependence (rtx, rtx); 2298extern int anti_dependence (rtx, rtx); 2299extern int output_dependence (rtx, rtx); 2300extern int unchanging_anti_dependence (rtx, rtx); 2301extern void mark_constant_function (void); 2302extern void init_alias_once (void); 2303extern void init_alias_analysis (void); 2304extern void end_alias_analysis (void); 2305extern rtx addr_side_effect_eval (rtx, int, int); 2306extern bool memory_modified_in_insn_p (rtx, rtx); 2307extern rtx find_base_term (rtx); 2308extern rtx get_reg_known_value (unsigned int); 2309extern bool get_reg_known_equiv_p (unsigned int); 2310 2311/* In sibcall.c */ 2312typedef enum { 2313 sibcall_use_normal = 1, 2314 sibcall_use_tail_recursion, 2315 sibcall_use_sibcall 2316} sibcall_use_t; 2317 2318extern void optimize_sibling_and_tail_recursive_calls (void); 2319extern void replace_call_placeholder (rtx, sibcall_use_t); 2320 2321#ifdef STACK_REGS 2322extern int stack_regs_mentioned (rtx insn); 2323#endif 2324 2325/* In toplev.c */ 2326extern GTY(()) rtx stack_limit_rtx; 2327 2328/* In regrename.c */ 2329extern void regrename_optimize (void); 2330extern void copyprop_hardreg_forward (void); 2331 2332/* In ifcvt.c */ 2333extern void if_convert (int); 2334 2335/* In predict.c */ 2336extern void invert_br_probabilities (rtx); 2337extern bool expensive_function_p (int); 2338/* In tracer.c */ 2339extern void tracer (unsigned int); 2340 2341#endif /* ! GCC_RTL_H */ 2342