1 /* Register Transfer Language (RTL) definitions for GNU C-Compiler 2 Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 3 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 2, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING. If not, write to the Free 19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 20 02111-1307, USA. */ 21 22 #ifndef GCC_RTL_H 23 #define GCC_RTL_H 24 25 struct function; 26 27 #include "machmode.h" 28 29 #undef FFS /* Some systems predefine this symbol; don't let it interfere. */ 30 #undef FLOAT /* Likewise. */ 31 #undef ABS /* Likewise. */ 32 #undef PC /* Likewise. */ 33 34 /* Value used by some passes to "recognize" noop moves as valid 35 instructions. */ 36 #define NOOP_MOVE_INSN_CODE INT_MAX 37 38 /* Register Transfer Language EXPRESSIONS CODES */ 39 40 #define RTX_CODE enum rtx_code 41 enum rtx_code { 42 43 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) ENUM , 44 #include "rtl.def" /* rtl expressions are documented here */ 45 #undef DEF_RTL_EXPR 46 47 LAST_AND_UNUSED_RTX_CODE}; /* A convenient way to get a value for 48 NUM_RTX_CODE. 49 Assumes default enum value assignment. */ 50 51 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE) 52 /* The cast here, saves many elsewhere. */ 53 54 extern const unsigned char rtx_length[NUM_RTX_CODE]; 55 #define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)]) 56 57 extern const char * const rtx_name[NUM_RTX_CODE]; 58 #define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)]) 59 60 extern const char * const rtx_format[NUM_RTX_CODE]; 61 #define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)]) 62 63 extern const char rtx_class[NUM_RTX_CODE]; 64 #define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) 65 66 extern const unsigned char rtx_next[NUM_RTX_CODE]; 67 68 /* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label 69 relative to which the offsets are calculated, as explained in rtl.def. */ 70 typedef struct 71 { 72 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */ 73 unsigned min_align: 8; 74 /* Flags: */ 75 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */ 76 unsigned min_after_vec: 1; /* minimum address target label is 77 after the ADDR_DIFF_VEC. */ 78 unsigned max_after_vec: 1; /* maximum address target label is 79 after the ADDR_DIFF_VEC. */ 80 unsigned min_after_base: 1; /* minimum address target label is 81 after BASE. */ 82 unsigned max_after_base: 1; /* maximum address target label is 83 after BASE. */ 84 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */ 85 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */ 86 unsigned : 2; 87 unsigned scale : 8; 88 } addr_diff_vec_flags; 89 90 /* Structure used to describe the attributes of a MEM. These are hashed 91 so MEMs that the same attributes share a data structure. This means 92 they cannot be modified in place. If any element is nonzero, it means 93 the value of the corresponding attribute is unknown. */ 94 /* ALIGN and SIZE are the alignment and size of the MEM itself, 95 while EXPR can describe a larger underlying object, which might have a 96 stricter alignment; OFFSET is the offset of the MEM within that object. */ 97 typedef struct mem_attrs GTY(()) 98 { 99 HOST_WIDE_INT alias; /* Memory alias set. */ 100 tree expr; /* expr corresponding to MEM. */ 101 rtx offset; /* Offset from start of DECL, as CONST_INT. */ 102 rtx size; /* Size in bytes, as a CONST_INT. */ 103 unsigned int align; /* Alignment of MEM in bits. */ 104 } mem_attrs; 105 106 /* Common union for an element of an rtx. */ 107 108 union rtunion_def 109 { 110 HOST_WIDE_INT rtwint; 111 int rtint; 112 unsigned int rtuint; 113 const char *rtstr; 114 rtx rtx; 115 rtvec rtvec; 116 enum machine_mode rttype; 117 addr_diff_vec_flags rt_addr_diff_vec_flags; 118 struct cselib_val_struct *rt_cselib; 119 struct bitmap_head_def *rtbit; 120 tree rttree; 121 struct basic_block_def *bb; 122 mem_attrs *rtmem; 123 }; 124 typedef union rtunion_def rtunion; 125 126 /* RTL expression ("rtx"). */ 127 128 struct rtx_def GTY((chain_next ("RTX_NEXT (&%h)"), 129 chain_prev ("RTX_PREV (&%h)"))) 130 { 131 /* The kind of expression this is. */ 132 ENUM_BITFIELD(rtx_code) code: 16; 133 134 /* The kind of value the expression has. */ 135 ENUM_BITFIELD(machine_mode) mode : 8; 136 137 /* 1 in a MEM if we should keep the alias set for this mem unchanged 138 when we access a component. 139 1 in a CALL_INSN if it is a sibling call. 140 1 in a SET that is for a return. 141 In a CODE_LABEL, part of the two-bit alternate entry field. */ 142 unsigned int jump : 1; 143 /* In a CODE_LABEL, part of the two-bit alternate entry field. 144 1 in a MEM if it cannot trap. */ 145 unsigned int call : 1; 146 /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere. 147 1 in a SUBREG if it references an unsigned object whose mode has been 148 from a promoted to a wider mode. 149 1 in a SYMBOL_REF if it addresses something in the per-function 150 constants pool. 151 1 in a CALL_INSN, NOTE, or EXPR_LIST for a const or pure call. 152 1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch. */ 153 unsigned int unchanging : 1; 154 /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile. 155 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE 156 if it has been deleted. 157 1 in a REG expression if corresponds to a variable declared by the user, 158 0 for an internally generated temporary. 159 1 in a SUBREG with a negative value. 160 1 in a LABEL_REF or in a REG_LABEL note for a non-local label. 161 In a SYMBOL_REF, this flag is used for machine-specific purposes. */ 162 unsigned int volatil : 1; 163 /* 1 in a MEM referring to a field of an aggregate. 164 0 if the MEM was a variable or the result of a * operator in C; 165 1 if it was the result of a . or -> operator (on a struct) in C. 166 1 in a REG if the register is used only in exit code a loop. 167 1 in a SUBREG expression if was generated from a variable with a 168 promoted mode. 169 1 in a CODE_LABEL if the label is used for nonlocal gotos 170 and must not be deleted even if its count is zero. 171 1 in a LABEL_REF if this is a reference to a label outside the 172 current loop. 173 1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled 174 together with the preceding insn. Valid only within sched. 175 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and 176 from the target of a branch. Valid from reorg until end of compilation; 177 cleared before used. 178 1 in an INSN or related rtx if this insn is dead code. Valid only during 179 dead-code elimination phase; cleared before use. */ 180 unsigned int in_struct : 1; 181 /* At the end of RTL generation, 1 if this rtx is used. This is used for 182 copying shared structure. See `unshare_all_rtl'. 183 In a REG, this is not needed for that purpose, and used instead 184 in `leaf_renumber_regs_insn'. 185 1 in a SYMBOL_REF, means that emit_library_call 186 has used it as the function. */ 187 unsigned int used : 1; 188 /* Nonzero if this rtx came from procedure integration. 189 1 in a REG or PARALLEL means this rtx refers to the return value 190 of the current function. 191 1 in a SYMBOL_REF if the symbol is weak. */ 192 unsigned integrated : 1; 193 /* 1 in an INSN or a SET if this rtx is related to the call frame, 194 either changing how we compute the frame address or saving and 195 restoring registers in the prologue and epilogue. 196 1 in a MEM if the MEM refers to a scalar, rather than a member of 197 an aggregate. 198 1 in a REG if the register is a pointer. 199 1 in a SYMBOL_REF if it addresses something in the per-function 200 constant string pool. */ 201 unsigned frame_related : 1; 202 203 /* The first element of the operands of this rtx. 204 The number of operands and their types are controlled 205 by the `code' field, according to rtl.def. */ 206 rtunion GTY ((special ("rtx_def"), 207 desc ("GET_CODE (&%0)"))) fld[1]; 208 }; 209 210 #define NULL_RTX (rtx) 0 211 212 /* The "next" and "previous" RTX, relative to this one. */ 213 214 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL \ 215 : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)])) 216 217 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed. 218 */ 219 #define RTX_PREV(X) ((GET_CODE (X) == INSN \ 220 || GET_CODE (X) == CALL_INSN \ 221 || GET_CODE (X) == JUMP_INSN \ 222 || GET_CODE (X) == NOTE \ 223 || GET_CODE (X) == BARRIER \ 224 || GET_CODE (X) == CODE_LABEL) \ 225 && PREV_INSN (X) != NULL \ 226 && NEXT_INSN (PREV_INSN (X)) == X \ 227 ? PREV_INSN (X) : NULL) 228 229 /* Define macros to access the `code' field of the rtx. */ 230 231 #define GET_CODE(RTX) ((enum rtx_code) (RTX)->code) 232 #define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE)) 233 234 #define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode) 235 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE)) 236 237 /* RTL vector. These appear inside RTX's when there is a need 238 for a variable number of things. The principle use is inside 239 PARALLEL expressions. */ 240 241 struct rtvec_def GTY(()) { 242 int num_elem; /* number of elements */ 243 rtx GTY ((length ("%h.num_elem"))) elem[1]; 244 }; 245 246 #define NULL_RTVEC (rtvec) 0 247 248 #define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) 249 #define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM)) 250 251 /* Predicate yielding nonzero iff X is an rtl for a register. */ 252 #define REG_P(X) (GET_CODE (X) == REG) 253 254 /* Predicate yielding nonzero iff X is a label insn. */ 255 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL) 256 257 /* Predicate yielding nonzero iff X is a jump insn. */ 258 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN) 259 260 /* Predicate yielding nonzero iff X is a note insn. */ 261 #define NOTE_P(X) (GET_CODE (X) == NOTE) 262 263 /* Predicate yielding nonzero iff X is a barrier insn. */ 264 #define BARRIER_P(X) (GET_CODE (X) == BARRIER) 265 266 /* Predicate yielding nonzero iff X is cc0. */ 267 #ifdef HAVE_cc0 268 #define CC0_P(X) ((X) == cc0_rtx) 269 #else 270 #define CC0_P(X) 0 271 #endif 272 273 /* Predicate yielding nonzero iff X is a data for a jump table. */ 274 #define JUMP_TABLE_DATA_P(INSN) \ 275 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \ 276 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC)) 277 278 /* 1 if X is a constant value that is an integer. */ 279 280 #define CONSTANT_P(X) \ 281 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 282 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \ 283 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \ 284 || GET_CODE (X) == CONST_VECTOR \ 285 || GET_CODE (X) == CONSTANT_P_RTX) 286 287 /* General accessor macros for accessing the fields of an rtx. */ 288 289 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007) 290 /* The bit with a star outside the statement expr and an & inside is 291 so that N can be evaluated only once. */ 292 #define RTL_CHECK1(RTX, N, C1) __extension__ \ 293 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 294 const enum rtx_code _code = GET_CODE (_rtx); \ 295 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 296 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 297 __FUNCTION__); \ 298 if (GET_RTX_FORMAT(_code)[_n] != C1) \ 299 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \ 300 __FUNCTION__); \ 301 &_rtx->fld[_n]; })) 302 303 #define RTL_CHECK2(RTX, N, C1, C2) __extension__ \ 304 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 305 const enum rtx_code _code = GET_CODE (_rtx); \ 306 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 307 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 308 __FUNCTION__); \ 309 if (GET_RTX_FORMAT(_code)[_n] != C1 \ 310 && GET_RTX_FORMAT(_code)[_n] != C2) \ 311 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \ 312 __FUNCTION__); \ 313 &_rtx->fld[_n]; })) 314 315 #define RTL_CHECKC1(RTX, N, C) __extension__ \ 316 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 317 if (GET_CODE (_rtx) != (C)) \ 318 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \ 319 __FUNCTION__); \ 320 &_rtx->fld[_n]; })) 321 322 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \ 323 (*({ rtx const _rtx = (RTX); const int _n = (N); \ 324 const enum rtx_code _code = GET_CODE (_rtx); \ 325 if (_code != (C1) && _code != (C2)) \ 326 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \ 327 __FUNCTION__); \ 328 &_rtx->fld[_n]; })) 329 330 #define RTVEC_ELT(RTVEC, I) __extension__ \ 331 (*({ rtvec const _rtvec = (RTVEC); const int _i = (I); \ 332 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \ 333 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \ 334 __FUNCTION__); \ 335 &_rtvec->elem[_i]; })) 336 337 extern void rtl_check_failed_bounds PARAMS ((rtx, int, 338 const char *, int, const char *)) 339 ATTRIBUTE_NORETURN; 340 extern void rtl_check_failed_type1 PARAMS ((rtx, int, int, 341 const char *, int, const char *)) 342 ATTRIBUTE_NORETURN; 343 extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int, 344 const char *, int, const char *)) 345 ATTRIBUTE_NORETURN; 346 extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code, 347 const char *, int, const char *)) 348 ATTRIBUTE_NORETURN; 349 extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code, 350 const char *, int, const char *)) 351 ATTRIBUTE_NORETURN; 352 extern void rtvec_check_failed_bounds PARAMS ((rtvec, int, 353 const char *, int, const char *)) 354 ATTRIBUTE_NORETURN; 355 356 #else /* not ENABLE_RTL_CHECKING */ 357 358 #define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N]) 359 #define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N]) 360 #define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N]) 361 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N]) 362 #define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I]) 363 364 #endif 365 366 /* General accessor macros for accessing the flags of an rtx. */ 367 368 /* Access an individual rtx flag, with no checking of any kind. */ 369 #define RTX_FLAG(RTX, FLAG) ((RTX)->FLAG) 370 371 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007) 372 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__ \ 373 ({ rtx const _rtx = (RTX); \ 374 if (GET_CODE(_rtx) != C1) \ 375 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 376 __FUNCTION__); \ 377 _rtx; }) 378 379 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__ \ 380 ({ rtx const _rtx = (RTX); \ 381 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2) \ 382 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \ 383 __FUNCTION__); \ 384 _rtx; }) 385 386 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__ \ 387 ({ rtx const _rtx = (RTX); \ 388 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 389 && GET_CODE(_rtx) != C3) \ 390 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 391 __FUNCTION__); \ 392 _rtx; }) 393 394 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__ \ 395 ({ rtx const _rtx = (RTX); \ 396 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 397 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4) \ 398 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 399 __FUNCTION__); \ 400 _rtx; }) 401 402 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__ \ 403 ({ rtx const _rtx = (RTX); \ 404 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 405 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 406 && GET_CODE(_rtx) != C5) \ 407 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 408 __FUNCTION__); \ 409 _rtx; }) 410 411 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) \ 412 __extension__ \ 413 ({ rtx const _rtx = (RTX); \ 414 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 415 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 416 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6) \ 417 rtl_check_failed_flag (NAME,_rtx, __FILE__, __LINE__, \ 418 __FUNCTION__); \ 419 _rtx; }) 420 421 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) \ 422 __extension__ \ 423 ({ rtx const _rtx = (RTX); \ 424 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 425 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 426 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 427 && GET_CODE(_rtx) != C7) \ 428 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 429 __FUNCTION__); \ 430 _rtx; }) 431 432 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) \ 433 __extension__ \ 434 ({ rtx const _rtx = (RTX); \ 435 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 436 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 437 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 438 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8) \ 439 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 440 __FUNCTION__); \ 441 _rtx; }) 442 443 #define RTL_FLAG_CHECK9(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8, C9) \ 444 __extension__ \ 445 ({ rtx const _rtx = (RTX); \ 446 if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2 \ 447 && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4 \ 448 && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6 \ 449 && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8 \ 450 && GET_CODE(_rtx) != C9) \ 451 rtl_check_failed_flag (NAME, _rtx, __FILE__, __LINE__, \ 452 __FUNCTION__); \ 453 _rtx; }) 454 455 extern void rtl_check_failed_flag PARAMS ((const char *, rtx, const char *, 456 int, const char *)) 457 ATTRIBUTE_NORETURN 458 ; 459 460 #else /* not ENABLE_RTL_FLAG_CHECKING */ 461 462 #define RTL_FLAG_CHECK1(NAME, RTX, C1) (RTX) 463 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) (RTX) 464 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) (RTX) 465 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) (RTX) 466 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) (RTX) 467 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6) (RTX) 468 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7) (RTX) 469 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8) (RTX) 470 #define RTL_FLAG_CHECK9(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8, C9) (RTX) 471 #endif 472 473 #define CLEAR_RTX_FLAGS(RTX) \ 474 do { \ 475 rtx const _rtx = (RTX); \ 476 _rtx->call = 0; \ 477 _rtx->frame_related = 0; \ 478 _rtx->in_struct = 0; \ 479 _rtx->integrated = 0; \ 480 _rtx->jump = 0; \ 481 _rtx->unchanging = 0; \ 482 _rtx->used = 0; \ 483 _rtx->volatil = 0; \ 484 } while (0) 485 486 #define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint) 487 #define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint) 488 #define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr) 489 #define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx) 490 #define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec) 491 #define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype) 492 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit) 493 #define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree) 494 #define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb) 495 #define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr) 496 497 #define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M) 498 #define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N)) 499 500 /* These are like XWINT, etc. except that they expect a '0' field instead 501 of the normal type code. */ 502 503 #define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint) 504 #define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint) 505 #define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint) 506 #define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr) 507 #define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx) 508 #define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec) 509 #define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype) 510 #define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit) 511 #define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree) 512 #define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb) 513 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags) 514 #define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib) 515 #define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem) 516 517 #define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint) 518 #define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint) 519 #define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint) 520 #define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr) 521 #define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx) 522 #define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec) 523 #define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype) 524 #define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit) 525 #define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree) 526 #define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb) 527 #define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags) 528 #define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib) 529 530 #define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M) 531 #define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C)) 532 533 #define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx) 534 535 /* ACCESS MACROS for particular fields of insns. */ 536 537 /* Determines whether X is an insn. */ 538 #define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i') 539 540 /* Holds a unique number for each insn. 541 These are not necessarily sequentially increasing. */ 542 #define INSN_UID(INSN) XINT (INSN, 0) 543 544 /* Chain insns together in sequence. */ 545 #define PREV_INSN(INSN) XEXP (INSN, 1) 546 #define NEXT_INSN(INSN) XEXP (INSN, 2) 547 548 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3) 549 #define INSN_SCOPE(INSN) XTREE (INSN, 4) 550 /* The body of an insn. */ 551 #define PATTERN(INSN) XEXP (INSN, 5) 552 553 /* Code number of instruction, from when it was recognized. 554 -1 means this instruction has not been recognized yet. */ 555 #define INSN_CODE(INSN) XINT (INSN, 6) 556 557 /* Set up in flow.c; empty before then. 558 Holds a chain of INSN_LIST rtx's whose first operands point at 559 previous insns with direct data-flow connections to this one. 560 That means that those insns set variables whose next use is in this insn. 561 They are always in the same basic block as this insn. */ 562 #define LOG_LINKS(INSN) XEXP(INSN, 7) 563 564 #define RTX_INTEGRATED_P(RTX) \ 565 (RTL_FLAG_CHECK9("RTX_INTEGRATED_P", (RTX), INSN, CALL_INSN, \ 566 JUMP_INSN, INSN_LIST, BARRIER, CODE_LABEL, CONST, \ 567 NOTE, PLUS)->integrated) 568 #define RTX_UNCHANGING_P(RTX) \ 569 (RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging) 570 #define RTX_FRAME_RELATED_P(RTX) \ 571 (RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \ 572 JUMP_INSN, BARRIER, SET)->frame_related) 573 574 /* 1 if RTX is an insn that has been deleted. */ 575 #define INSN_DELETED_P(RTX) \ 576 (RTL_FLAG_CHECK6("INSN_DELETED_P", (RTX), INSN, CALL_INSN, JUMP_INSN, \ 577 CODE_LABEL, BARRIER, NOTE)->volatil) 578 579 /* 1 if RTX is a call to a const or pure function. */ 580 #define CONST_OR_PURE_CALL_P(RTX) \ 581 (RTL_FLAG_CHECK3("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN, NOTE, \ 582 EXPR_LIST)->unchanging) 583 584 /* 1 if RTX is a call_insn for a sibling call. */ 585 #define SIBLING_CALL_P(RTX) \ 586 (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump) 587 588 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch. */ 589 #define INSN_ANNULLED_BRANCH_P(RTX) \ 590 (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging) 591 592 /* 1 if RTX is an insn that is dead code. Valid only for dead-code 593 elimination phase. */ 594 #define INSN_DEAD_CODE_P(RTX) \ 595 (RTL_FLAG_CHECK1("INSN_DEAD_CODE_P", (RTX), INSN)->in_struct) 596 597 /* 1 if RTX is an insn in a delay slot and is from the target of the branch. 598 If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be 599 executed if the branch is taken. For annulled branches with this bit 600 clear, the insn should be executed only if the branch is not taken. */ 601 #define INSN_FROM_TARGET_P(RTX) \ 602 (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct) 603 604 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4) 605 606 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0) 607 608 /* Holds a list of notes on what this insn does to various REGs. 609 It is a chain of EXPR_LIST rtx's, where the second operand is the 610 chain pointer and the first operand is the REG being described. 611 The mode field of the EXPR_LIST contains not a real machine mode 612 but a value from enum reg_note. */ 613 614 #define REG_NOTES(INSN) XEXP(INSN, 8) 615 616 /* Don't forget to change reg_note_name in rtl.c. */ 617 enum reg_note 618 { 619 /* The value in REG dies in this insn (i.e., it is not needed past 620 this insn). If REG is set in this insn, the REG_DEAD note may, 621 but need not, be omitted. */ 622 REG_DEAD = 1, 623 624 /* The REG is autoincremented or autodecremented. */ 625 REG_INC, 626 627 /* Describes the insn as a whole; it says that the insn sets a register 628 to a constant value or to be equivalent to a memory address. If the 629 register is spilled to the stack then the constant value should be 630 substituted for it. The contents of the REG_EQUIV is the constant 631 value or memory address, which may be different from the source of 632 the SET although it has the same value. A REG_EQUIV note may also 633 appear on an insn which copies a register parameter to a pseudo-register, 634 if there is a memory address which could be used to hold that 635 pseudo-register throughout the function. */ 636 REG_EQUIV, 637 638 /* Like REG_EQUIV except that the destination is only momentarily equal 639 to the specified rtx. Therefore, it cannot be used for substitution; 640 but it can be used for cse. */ 641 REG_EQUAL, 642 643 /* The register set in this insn held 0 before the insn. The contents of 644 the note is the insn that stored the 0. If that insn is deleted or 645 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note 646 is actually an INSN_LIST, not an EXPR_LIST. */ 647 REG_WAS_0, 648 649 /* This insn copies the return-value of a library call out of the hard reg 650 for return values. This note is actually an INSN_LIST and it points to 651 the first insn involved in setting up arguments for the call. flow.c 652 uses this to delete the entire library call when its result is dead. */ 653 REG_RETVAL, 654 655 /* The inverse of REG_RETVAL: it goes on the first insn of the library call 656 and points at the one that has the REG_RETVAL. This note is also an 657 INSN_LIST. */ 658 REG_LIBCALL, 659 660 /* The register is always nonnegative during the containing loop. This is 661 used in branches so that decrement and branch instructions terminating 662 on zero can be matched. There must be an insn pattern in the md file 663 named `decrement_and_branch_until_zero' or else this will never be added 664 to any instructions. */ 665 REG_NONNEG, 666 667 /* There is no conflict *after this insn* between the register in the note 668 and the destination of this insn. */ 669 REG_NO_CONFLICT, 670 671 /* Identifies a register set in this insn and never used. */ 672 REG_UNUSED, 673 674 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0, 675 respectively. Normally, these are required to be consecutive insns, but 676 we permit putting a cc0-setting insn in the delay slot of a branch as 677 long as only one copy of the insn exists. In that case, these notes 678 point from one to the other to allow code generation to determine what 679 any require information and to properly update CC_STATUS. These notes 680 are INSN_LISTs. */ 681 REG_CC_SETTER, REG_CC_USER, 682 683 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the 684 CODE_LABEL contained in the REG_LABEL note is used by the insn. 685 This note is an INSN_LIST. */ 686 REG_LABEL, 687 688 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent 689 write-after-read and write-after-write dependencies respectively. 690 Data dependencies, which are the only type of LOG_LINK created by 691 flow, are represented by a 0 reg note kind. */ 692 REG_DEP_ANTI, REG_DEP_OUTPUT, 693 694 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs. 695 It has an integer value. For jumps, it is the probability that this is a 696 taken branch. For calls, it is the probability that this call won't 697 return. */ 698 REG_BR_PROB, 699 700 /* Attached to a call insn; indicates that the call is malloc-like and 701 that the pointer returned cannot alias anything else. */ 702 REG_NOALIAS, 703 704 /* Used to optimize rtl generated by dynamic stack allocations for targets 705 where SETJMP_VIA_SAVE_AREA is true. */ 706 REG_SAVE_AREA, 707 708 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains 709 CONCAT of two integer value. First specifies the branch predictor 710 that added the note, second specifies the predicted hitrate of branch 711 in the same format as REG_BR_PROB note uses. */ 712 REG_BR_PRED, 713 714 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex 715 for DWARF to interpret what they imply. The attached rtx is used 716 instead of intuition. */ 717 REG_FRAME_RELATED_EXPR, 718 719 /* Indicates that REG holds the exception context for the function. 720 This context is shared by inline functions, so the code to acquire 721 the real exception context is delayed until after inlining. */ 722 REG_EH_CONTEXT, 723 724 /* Indicates what exception region an INSN belongs in. This is used to 725 indicate what region to which a call may throw. REGION 0 indicates 726 that a call cannot throw at all. REGION -1 indicates that it cannot 727 throw, nor will it execute a non-local goto. */ 728 REG_EH_REGION, 729 730 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */ 731 REG_SAVE_NOTE, 732 733 /* Indicates that this insn (which is part of the prologue) computes 734 a value which might not be used later, and if so it's OK to delete 735 the insn. Normally, deleting any insn in the prologue is an error. 736 At present the parameter is unused and set to (const_int 0). */ 737 REG_MAYBE_DEAD, 738 739 /* Indicates that a call does not return. */ 740 REG_NORETURN, 741 742 /* Indicates that an indirect jump is a non-local goto instead of a 743 computed goto. */ 744 REG_NON_LOCAL_GOTO, 745 746 /* This kind of note is generated at each to `setjmp', 747 and similar functions that can return twice. */ 748 REG_SETJMP, 749 750 /* Indicate calls that always returns. */ 751 REG_ALWAYS_RETURN, 752 753 /* Indicate that the memory load references a vtable. The expression 754 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */ 755 REG_VTABLE_REF 756 }; 757 758 /* The base value for branch probability notes. */ 759 #define REG_BR_PROB_BASE 10000 760 761 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ 762 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) 763 #define PUT_REG_NOTE_KIND(LINK, KIND) \ 764 PUT_MODE (LINK, (enum machine_mode) (KIND)) 765 766 /* Names for REG_NOTE's in EXPR_LIST insn's. */ 767 768 extern const char * const reg_note_name[]; 769 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)]) 770 771 /* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of 772 USE and CLOBBER expressions. 773 USE expressions list the registers filled with arguments that 774 are passed to the function. 775 CLOBBER expressions document the registers explicitly clobbered 776 by this CALL_INSN. 777 Pseudo registers can not be mentioned in this list. */ 778 #define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 9) 779 780 /* The label-number of a code-label. The assembler label 781 is made from `L' and the label-number printed in decimal. 782 Label numbers are unique in a compilation. */ 783 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6) 784 785 #define LINE_NUMBER NOTE 786 787 /* In a NOTE that is a line number, this is a string for the file name that the 788 line is in. We use the same field to record block numbers temporarily in 789 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts 790 between ints and pointers if we use a different macro for the block number.) 791 */ 792 793 #define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 4, NOTE) 794 #define NOTE_BLOCK(INSN) XCTREE (INSN, 4, NOTE) 795 #define NOTE_EH_HANDLER(INSN) XCINT (INSN, 4, NOTE) 796 #define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 4, NOTE) 797 #define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 4, NOTE) 798 #define NOTE_PREDICTION(INSN) XCINT (INSN, 4, NOTE) 799 #define NOTE_PRECONDITIONED(INSN) XCINT (INSN, 4, NOTE) 800 801 /* In a NOTE that is a line number, this is the line number. 802 Other kinds of NOTEs are identified by negative numbers here. */ 803 #define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 5, NOTE) 804 805 /* Nonzero if INSN is a note marking the beginning of a basic block. */ 806 #define NOTE_INSN_BASIC_BLOCK_P(INSN) \ 807 (GET_CODE (INSN) == NOTE \ 808 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK) 809 810 /* Algorithm and flags for prediction. */ 811 #define NOTE_PREDICTION_ALG(INSN) (XCINT(INSN, 4, NOTE)>>8) 812 #define NOTE_PREDICTION_FLAGS(INSN) (XCINT(INSN, 4, NOTE)&0xff) 813 #define NOTE_PREDICT(ALG,FLAGS) ((ALG<<8)+(FLAGS)) 814 815 /* Codes that appear in the NOTE_LINE_NUMBER field 816 for kinds of notes that are not line numbers. 817 818 Notice that we do not try to use zero here for any of 819 the special note codes because sometimes the source line 820 actually can be zero! This happens (for example) when we 821 are generating code for the per-translation-unit constructor 822 and destructor routines for some C++ translation unit. 823 824 If you should change any of the following values, or if you 825 should add a new value here, don't forget to change the 826 note_insn_name array in rtl.c. */ 827 828 enum insn_note 829 { 830 /* Keep all of these numbers negative. Adjust as needed. */ 831 NOTE_INSN_BIAS = -100, 832 833 /* This note is used to get rid of an insn 834 when it isn't safe to patch the insn out of the chain. */ 835 NOTE_INSN_DELETED, 836 837 /* These are used to mark the beginning and end of a lexical block. 838 See NOTE_BLOCK, identify_blocks and reorder_blocks. */ 839 NOTE_INSN_BLOCK_BEG, 840 NOTE_INSN_BLOCK_END, 841 842 /* These mark the extremes of a loop. */ 843 NOTE_INSN_LOOP_BEG, 844 NOTE_INSN_LOOP_END, 845 846 /* Generated at the place in a loop that `continue' jumps to. */ 847 NOTE_INSN_LOOP_CONT, 848 /* Generated at the start of a duplicated exit test. */ 849 NOTE_INSN_LOOP_VTOP, 850 851 /* Generated at the end of a conditional at the top of the loop. 852 This is used to perform a lame form of loop rotation in lieu 853 of actually understanding the loop structure. The note is 854 discarded after rotation is complete. */ 855 NOTE_INSN_LOOP_END_TOP_COND, 856 857 /* This kind of note is generated at the end of the function body, 858 just before the return insn or return label. In an optimizing 859 compilation it is deleted by the first jump optimization, after 860 enabling that optimizer to determine whether control can fall 861 off the end of the function body without a return statement. */ 862 NOTE_INSN_FUNCTION_END, 863 864 /* This marks the point immediately after the last prologue insn. */ 865 NOTE_INSN_PROLOGUE_END, 866 867 /* This marks the point immediately prior to the first epilogue insn. */ 868 NOTE_INSN_EPILOGUE_BEG, 869 870 /* Generated in place of user-declared labels when they are deleted. */ 871 NOTE_INSN_DELETED_LABEL, 872 873 /* This note indicates the start of the real body of the function, 874 i.e. the point just after all of the parms have been moved into 875 their homes, etc. */ 876 NOTE_INSN_FUNCTION_BEG, 877 878 /* These note where exception handling regions begin and end. 879 Uses NOTE_EH_HANDLER to identify the region in question. */ 880 NOTE_INSN_EH_REGION_BEG, 881 NOTE_INSN_EH_REGION_END, 882 883 /* Generated whenever a duplicate line number note is output. For example, 884 one is output after the end of an inline function, in order to prevent 885 the line containing the inline call from being counted twice in gcov. */ 886 NOTE_INSN_REPEATED_LINE_NUMBER, 887 888 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */ 889 NOTE_INSN_BASIC_BLOCK, 890 891 /* Record the expected value of a register at a location. Uses 892 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */ 893 NOTE_INSN_EXPECTED_VALUE, 894 895 /* Record a prediction. Uses NOTE_PREDICTION. */ 896 NOTE_INSN_PREDICTION, 897 898 NOTE_INSN_MAX 899 }; 900 901 /* Names for NOTE insn's other than line numbers. */ 902 903 extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS]; 904 #define GET_NOTE_INSN_NAME(NOTE_CODE) \ 905 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS]) 906 907 /* The name of a label, in case it corresponds to an explicit label 908 in the input source code. */ 909 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL) 910 911 /* In jump.c, each label contains a count of the number 912 of LABEL_REFs that point at it, so unused labels can be deleted. */ 913 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL) 914 915 /* Labels carry a two-bit field composed of the ->jump and ->call 916 bits. This field indicates whether the label is an alternate 917 entry point, and if so, what kind. */ 918 enum label_kind 919 { 920 LABEL_NORMAL = 0, /* ordinary label */ 921 LABEL_STATIC_ENTRY, /* alternate entry point, not exported */ 922 LABEL_GLOBAL_ENTRY, /* alternate entry point, exported */ 923 LABEL_WEAK_ENTRY /* alternate entry point, exported as weak symbol */ 924 }; 925 926 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007) 927 928 /* Retrieve the kind of LABEL. */ 929 #define LABEL_KIND(LABEL) __extension__ \ 930 ({ rtx const _label = (LABEL); \ 931 if (GET_CODE (_label) != CODE_LABEL) \ 932 rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__, \ 933 __FUNCTION__); \ 934 (enum label_kind) ((_label->jump << 1) | _label->call); }) 935 936 /* Set the kind of LABEL. */ 937 #define SET_LABEL_KIND(LABEL, KIND) do { \ 938 rtx _label = (LABEL); \ 939 unsigned int _kind = (KIND); \ 940 if (GET_CODE (_label) != CODE_LABEL) \ 941 rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \ 942 __FUNCTION__); \ 943 _label->jump = ((_kind >> 1) & 1); \ 944 _label->call = (_kind & 1); \ 945 } while (0) 946 947 #else 948 949 /* Retrieve the kind of LABEL. */ 950 #define LABEL_KIND(LABEL) \ 951 ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call)) 952 953 /* Set the kind of LABEL. */ 954 #define SET_LABEL_KIND(LABEL, KIND) do { \ 955 rtx _label = (LABEL); \ 956 unsigned int _kind = (KIND); \ 957 _label->jump = ((_kind >> 1) & 1); \ 958 _label->call = (_kind & 1); \ 959 } while (0) 960 961 #endif /* rtl flag checking */ 962 963 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL) 964 965 /* The original regno this ADDRESSOF was built for. */ 966 #define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF) 967 968 /* The variable in the register we took the address of. */ 969 #define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF) 970 971 /* In jump.c, each JUMP_INSN can point to a label that it can jump to, 972 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can 973 be decremented and possibly the label can be deleted. */ 974 #define JUMP_LABEL(INSN) XCEXP (INSN, 9, JUMP_INSN) 975 976 /* Once basic blocks are found in flow.c, 977 each CODE_LABEL starts a chain that goes through 978 all the LABEL_REFs that jump to that label. 979 The chain eventually winds up at the CODE_LABEL: it is circular. */ 980 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL) 981 982 /* This is the field in the LABEL_REF through which the circular chain 983 of references to a particular label is linked. 984 This chain is set up in flow.c. */ 985 986 #define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF) 987 988 /* Once basic blocks are found in flow.c, 989 Each LABEL_REF points to its containing instruction with this field. */ 990 991 #define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF) 992 993 /* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds 994 the number the register originally had; for a pseudo register turned into 995 a hard reg this will hold the old pseudo register number. */ 996 997 #define REGNO(RTX) XCUINT (RTX, 0, REG) 998 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1) 999 1000 /* 1 if RTX is a reg or parallel that is the current function's return 1001 value. */ 1002 #define REG_FUNCTION_VALUE_P(RTX) \ 1003 (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->integrated) 1004 1005 /* 1 if RTX is a reg that corresponds to a variable declared by the user. */ 1006 #define REG_USERVAR_P(RTX) \ 1007 (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil) 1008 1009 /* 1 if RTX is a reg that holds a pointer value. */ 1010 #define REG_POINTER(RTX) \ 1011 (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related) 1012 1013 /* 1 if the given register REG corresponds to a hard register. */ 1014 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG))) 1015 1016 /* 1 if the given register number REG_NO corresponds to a hard register. */ 1017 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER) 1018 1019 /* For a CONST_INT rtx, INTVAL extracts the integer. */ 1020 1021 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT) 1022 1023 /* For a CONST_DOUBLE: 1024 For a DImode, there are two integers CONST_DOUBLE_LOW is the 1025 low-order word and ..._HIGH the high-order. 1026 For a float, there is a REAL_VALUE_TYPE structure, and 1027 CONST_DOUBLE_REAL_VALUE(r) is a pointer to it. */ 1028 #define CONST_DOUBLE_LOW(r) XCWINT (r, 0, CONST_DOUBLE) 1029 #define CONST_DOUBLE_HIGH(r) XCWINT (r, 1, CONST_DOUBLE) 1030 #define CONST_DOUBLE_REAL_VALUE(r) ((struct real_value *)&CONST_DOUBLE_LOW(r)) 1031 1032 /* For a CONST_VECTOR, return element #n. */ 1033 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR) 1034 1035 /* For a CONST_VECTOR, return the number of elements in a vector. */ 1036 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR) 1037 1038 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. 1039 SUBREG_BYTE extracts the byte-number. */ 1040 1041 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG) 1042 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG) 1043 1044 /* in rtlanal.c */ 1045 extern unsigned int subreg_lsb PARAMS ((rtx)); 1046 extern unsigned int subreg_regno_offset PARAMS ((unsigned int, 1047 enum machine_mode, 1048 unsigned int, 1049 enum machine_mode)); 1050 extern bool subreg_offset_representable_p PARAMS ((unsigned int, 1051 enum machine_mode, 1052 unsigned int, 1053 enum machine_mode)); 1054 extern unsigned int subreg_regno PARAMS ((rtx)); 1055 1056 /* 1 if RTX is a subreg containing a reg that is already known to be 1057 sign- or zero-extended from the mode of the subreg to the mode of 1058 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the 1059 extension. 1060 1061 When used as a LHS, is means that this extension must be done 1062 when assigning to SUBREG_REG. */ 1063 1064 #define SUBREG_PROMOTED_VAR_P(RTX) \ 1065 (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct) 1066 1067 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL) \ 1068 do { \ 1069 rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \ 1070 if ((VAL) < 0) \ 1071 _rtx->volatil = 1; \ 1072 else { \ 1073 _rtx->volatil = 0; \ 1074 _rtx->unchanging = (VAL); \ 1075 } \ 1076 } while (0) 1077 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \ 1078 ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \ 1079 ? -1 : (RTX)->unchanging) 1080 1081 /* Access various components of an ASM_OPERANDS rtx. */ 1082 1083 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS) 1084 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS) 1085 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS) 1086 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS) 1087 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS) 1088 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS) 1089 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS) 1090 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \ 1091 XCVECEXP (RTX, 4, N, ASM_OPERANDS) 1092 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \ 1093 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0) 1094 #define ASM_OPERANDS_INPUT_MODE(RTX, N) \ 1095 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS)) 1096 #define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS) 1097 #define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS) 1098 1099 /* 1 if RTX is a mem and we should keep the alias set for this mem 1100 unchanged when we access a component. Set to 1, or example, when we 1101 are already in a non-addressable component of an aggregate. */ 1102 #define MEM_KEEP_ALIAS_SET_P(RTX) \ 1103 (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump) 1104 1105 /* 1 if RTX is a mem or asm_operand for a volatile reference. */ 1106 #define MEM_VOLATILE_P(RTX) \ 1107 (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS, \ 1108 ASM_INPUT)->volatil) 1109 1110 /* 1 if RTX is a mem that refers to an aggregate, either to the 1111 aggregate itself of to a field of the aggregate. If zero, RTX may 1112 or may not be such a reference. */ 1113 #define MEM_IN_STRUCT_P(RTX) \ 1114 (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct) 1115 1116 /* 1 if RTX is a mem that refers to a scalar. If zero, RTX may or may 1117 not refer to a scalar. */ 1118 #define MEM_SCALAR_P(RTX) \ 1119 (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->frame_related) 1120 1121 /* 1 if RTX is a mem that cannot trap. */ 1122 #define MEM_NOTRAP_P(RTX) \ 1123 (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call) 1124 1125 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in 1126 RTX. Otherwise, vice versa. Use this macro only when you are 1127 *sure* that you know that the MEM is in a structure, or is a 1128 scalar. VAL is evaluated only once. */ 1129 #define MEM_SET_IN_STRUCT_P(RTX, VAL) \ 1130 do { \ 1131 if (VAL) \ 1132 { \ 1133 MEM_IN_STRUCT_P (RTX) = 1; \ 1134 MEM_SCALAR_P (RTX) = 0; \ 1135 } \ 1136 else \ 1137 { \ 1138 MEM_IN_STRUCT_P (RTX) = 0; \ 1139 MEM_SCALAR_P (RTX) = 1; \ 1140 } \ 1141 } while (0) 1142 1143 /* The memory attribute block. We provide access macros for each value 1144 in the block and provide defaults if none specified. */ 1145 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1) 1146 1147 /* For a MEM rtx, the alias set. If 0, this MEM is not in any alias 1148 set, and may alias anything. Otherwise, the MEM can only alias 1149 MEMs in the same alias set. This value is set in a 1150 language-dependent manner in the front-end, and should not be 1151 altered in the back-end. These set numbers are tested for zero, 1152 and compared for equality; they have no other significance. In 1153 some front-ends, these numbers may correspond in some way to types, 1154 or other language-level entities, but they need not, and the 1155 back-end makes no such assumptions. */ 1156 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias) 1157 1158 /* For a MEM rtx, the decl it is known to refer to, if it is known to 1159 refer to part of a DECL. It may also be a COMPONENT_REF. */ 1160 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr) 1161 1162 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a 1163 RTX that is always a CONST_INT. */ 1164 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset) 1165 1166 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that 1167 is always a CONST_INT. */ 1168 #define MEM_SIZE(RTX) \ 1169 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \ 1170 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \ 1171 : 0) 1172 1173 /* For a MEM rtx, the alignment in bits. We can use the alignment of the 1174 mode as a default when STRICT_ALIGNMENT, but not if not. */ 1175 #define MEM_ALIGN(RTX) \ 1176 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \ 1177 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \ 1178 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT)) 1179 1180 /* Copy the attributes that apply to memory locations from RHS to LHS. */ 1181 #define MEM_COPY_ATTRIBUTES(LHS, RHS) \ 1182 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \ 1183 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \ 1184 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \ 1185 MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \ 1186 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \ 1187 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \ 1188 MEM_ATTRS (LHS) = MEM_ATTRS (RHS)) 1189 1190 /* 1 if RTX is a label_ref to a label outside the loop containing the 1191 reference. */ 1192 #define LABEL_OUTSIDE_LOOP_P(RTX) \ 1193 (RTL_FLAG_CHECK1("LABEL_OUTSIDE_LOOP_P", (RTX), LABEL_REF)->in_struct) 1194 1195 /* 1 if RTX is a label_ref for a nonlocal label. */ 1196 /* Likewise in an expr_list for a reg_label note. */ 1197 #define LABEL_REF_NONLOCAL_P(RTX) \ 1198 (RTL_FLAG_CHECK2("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF, \ 1199 REG_LABEL)->volatil) 1200 1201 /* 1 if RTX is a code_label that should always be considered to be needed. */ 1202 #define LABEL_PRESERVE_P(RTX) \ 1203 (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct) 1204 1205 /* 1 if RTX is a reg that is used only in an exit test of a loop. */ 1206 #define REG_LOOP_TEST_P(RTX) \ 1207 (RTL_FLAG_CHECK1("REG_LOOP_TEST_P", (RTX), REG)->in_struct) 1208 1209 /* During sched, 1 if RTX is an insn that must be scheduled together 1210 with the preceding insn. */ 1211 #define SCHED_GROUP_P(RTX) \ 1212 (RTL_FLAG_CHECK3("SCHED_GROUP_P", (RTX), INSN, JUMP_INSN, CALL_INSN \ 1213 )->in_struct) 1214 1215 /* For a SET rtx, SET_DEST is the place that is set 1216 and SET_SRC is the value it is set to. */ 1217 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER) 1218 #define SET_SRC(RTX) XCEXP(RTX, 1, SET) 1219 #define SET_IS_RETURN_P(RTX) \ 1220 (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump) 1221 1222 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ 1223 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF) 1224 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF) 1225 1226 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base 1227 conditionally executing the code on, COND_EXEC_CODE is the code 1228 to execute if the condition is true. */ 1229 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC) 1230 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC) 1231 1232 /* 1 if RTX is a symbol_ref that addresses this function's constants pool. */ 1233 #define CONSTANT_POOL_ADDRESS_P(RTX) \ 1234 (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging) 1235 1236 /* 1 if RTX is a symbol_ref that addresses this function's string constant 1237 pool */ 1238 #define STRING_POOL_ADDRESS_P(RTX) \ 1239 (RTL_FLAG_CHECK1("STRING_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->frame_related) 1240 1241 /* Used if RTX is a symbol_ref, for machine-specific purposes. */ 1242 #define SYMBOL_REF_FLAG(RTX) \ 1243 (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil) 1244 1245 /* 1 if RTX is a symbol_ref that has been the library function in 1246 emit_library_call. */ 1247 #define SYMBOL_REF_USED(RTX) \ 1248 (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used) 1249 1250 /* 1 if RTX is a symbol_ref for a weak symbol. */ 1251 #define SYMBOL_REF_WEAK(RTX) \ 1252 (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->integrated) 1253 1254 /* Define a macro to look for REG_INC notes, 1255 but save time on machines where they never exist. */ 1256 1257 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1258 #define FIND_REG_INC_NOTE(INSN, REG) \ 1259 ((REG) != NULL_RTX && REG_P ((REG)) \ 1260 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \ 1261 : find_reg_note ((INSN), REG_INC, (REG))) 1262 #else 1263 #define FIND_REG_INC_NOTE(INSN, REG) 0 1264 #endif 1265 1266 /* Indicate whether the machine has any sort of auto increment addressing. 1267 If not, we can avoid checking for REG_INC notes. */ 1268 1269 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1270 #define AUTO_INC_DEC 1271 #endif 1272 1273 #ifndef HAVE_PRE_INCREMENT 1274 #define HAVE_PRE_INCREMENT 0 1275 #endif 1276 1277 #ifndef HAVE_PRE_DECREMENT 1278 #define HAVE_PRE_DECREMENT 0 1279 #endif 1280 1281 #ifndef HAVE_POST_INCREMENT 1282 #define HAVE_POST_INCREMENT 0 1283 #endif 1284 1285 #ifndef HAVE_POST_DECREMENT 1286 #define HAVE_POST_DECREMENT 0 1287 #endif 1288 1289 #ifndef HAVE_POST_MODIFY_DISP 1290 #define HAVE_POST_MODIFY_DISP 0 1291 #endif 1292 1293 #ifndef HAVE_POST_MODIFY_REG 1294 #define HAVE_POST_MODIFY_REG 0 1295 #endif 1296 1297 #ifndef HAVE_PRE_MODIFY_DISP 1298 #define HAVE_PRE_MODIFY_DISP 0 1299 #endif 1300 1301 #ifndef HAVE_PRE_MODIFY_REG 1302 #define HAVE_PRE_MODIFY_REG 0 1303 #endif 1304 1305 1306 /* Some architectures do not have complete pre/post increment/decrement 1307 instruction sets, or only move some modes efficiently. These macros 1308 allow us to tune autoincrement generation. */ 1309 1310 #ifndef USE_LOAD_POST_INCREMENT 1311 #define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1312 #endif 1313 1314 #ifndef USE_LOAD_POST_DECREMENT 1315 #define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1316 #endif 1317 1318 #ifndef USE_LOAD_PRE_INCREMENT 1319 #define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1320 #endif 1321 1322 #ifndef USE_LOAD_PRE_DECREMENT 1323 #define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1324 #endif 1325 1326 #ifndef USE_STORE_POST_INCREMENT 1327 #define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1328 #endif 1329 1330 #ifndef USE_STORE_POST_DECREMENT 1331 #define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1332 #endif 1333 1334 #ifndef USE_STORE_PRE_INCREMENT 1335 #define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1336 #endif 1337 1338 #ifndef USE_STORE_PRE_DECREMENT 1339 #define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1340 #endif 1341 1342 /* Determine if the insn is a PHI node. */ 1343 #define PHI_NODE_P(X) \ 1344 ((X) && GET_CODE (X) == INSN \ 1345 && GET_CODE (PATTERN (X)) == SET \ 1346 && GET_CODE (SET_SRC (PATTERN (X))) == PHI) 1347 1348 /* Nonzero if we need to distinguish between the return value of this function 1349 and the return value of a function called by this function. This helps 1350 integrate.c. 1351 This is 1 until after the rtl generation pass. */ 1352 extern int rtx_equal_function_value_matters; 1353 1354 /* Nonzero when we are generating CONCATs. */ 1355 extern int generating_concat_p; 1356 1357 /* Generally useful functions. */ 1358 1359 /* In expmed.c */ 1360 extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT)); 1361 1362 #define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C)) 1363 1364 /* In builtins.c */ 1365 extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx)); 1366 1367 /* In explow.c */ 1368 extern void set_stack_check_libfunc PARAMS ((rtx)); 1369 extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT, 1370 enum machine_mode)); 1371 extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT)); 1372 extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT)); 1373 extern void optimize_save_area_alloca PARAMS ((rtx)); 1374 1375 /* In emit-rtl.c */ 1376 extern rtx gen_rtx PARAMS ((enum rtx_code, 1377 enum machine_mode, ...)); 1378 extern rtvec gen_rtvec PARAMS ((int, ...)); 1379 extern rtx copy_insn_1 PARAMS ((rtx)); 1380 extern rtx copy_insn PARAMS ((rtx)); 1381 extern rtx gen_int_mode PARAMS ((HOST_WIDE_INT, 1382 enum machine_mode)); 1383 extern rtx emit_copy_of_insn_after PARAMS ((rtx, rtx)); 1384 1385 /* In rtl.c */ 1386 extern rtx rtx_alloc PARAMS ((RTX_CODE)); 1387 extern rtvec rtvec_alloc PARAMS ((int)); 1388 extern rtx copy_rtx PARAMS ((rtx)); 1389 1390 /* In emit-rtl.c */ 1391 extern rtx copy_rtx_if_shared PARAMS ((rtx)); 1392 1393 /* In rtl.c */ 1394 extern rtx copy_most_rtx PARAMS ((rtx, rtx)); 1395 extern rtx shallow_copy_rtx PARAMS ((rtx)); 1396 extern int rtx_equal_p PARAMS ((rtx, rtx)); 1397 1398 /* In emit-rtl.c */ 1399 extern rtvec gen_rtvec_v PARAMS ((int, rtx *)); 1400 extern rtx gen_reg_rtx PARAMS ((enum machine_mode)); 1401 extern rtx gen_label_rtx PARAMS ((void)); 1402 extern int subreg_hard_regno PARAMS ((rtx, int)); 1403 extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx)); 1404 extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx)); 1405 1406 /* In cse.c */ 1407 extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx)); 1408 1409 /* In emit-rtl.c */ 1410 extern rtx gen_highpart PARAMS ((enum machine_mode, rtx)); 1411 extern rtx gen_highpart_mode PARAMS ((enum machine_mode, 1412 enum machine_mode, rtx)); 1413 extern rtx gen_realpart PARAMS ((enum machine_mode, rtx)); 1414 extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx)); 1415 extern rtx operand_subword PARAMS ((rtx, unsigned int, int, 1416 enum machine_mode)); 1417 extern rtx constant_subword PARAMS ((rtx, int, 1418 enum machine_mode)); 1419 1420 /* In emit-rtl.c */ 1421 extern rtx operand_subword_force PARAMS ((rtx, unsigned int, 1422 enum machine_mode)); 1423 extern int subreg_lowpart_p PARAMS ((rtx)); 1424 extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode, 1425 enum machine_mode)); 1426 extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode, 1427 enum machine_mode)); 1428 extern rtx make_safe_from PARAMS ((rtx, rtx)); 1429 extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx)); 1430 extern rtx get_insns PARAMS ((void)); 1431 extern const char *get_insn_name PARAMS ((int)); 1432 extern rtx get_last_insn PARAMS ((void)); 1433 extern rtx get_last_insn_anywhere PARAMS ((void)); 1434 extern rtx get_first_nonnote_insn PARAMS ((void)); 1435 extern rtx get_last_nonnote_insn PARAMS ((void)); 1436 extern void start_sequence PARAMS ((void)); 1437 extern void push_to_sequence PARAMS ((rtx)); 1438 extern void end_sequence PARAMS ((void)); 1439 extern void push_to_full_sequence PARAMS ((rtx, rtx)); 1440 extern void end_full_sequence PARAMS ((rtx*, rtx*)); 1441 1442 /* In varasm.c */ 1443 extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode)); 1444 extern rtx force_const_mem PARAMS ((enum machine_mode, rtx)); 1445 1446 /* In varasm.c */ 1447 extern rtx get_pool_constant PARAMS ((rtx)); 1448 extern rtx get_pool_constant_mark PARAMS ((rtx, bool *)); 1449 extern enum machine_mode get_pool_mode PARAMS ((rtx)); 1450 extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx)); 1451 extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx)); 1452 extern int get_pool_offset PARAMS ((rtx)); 1453 extern rtx simplify_subtraction PARAMS ((rtx)); 1454 1455 /* In function.c */ 1456 extern rtx assign_stack_local PARAMS ((enum machine_mode, 1457 HOST_WIDE_INT, int)); 1458 extern rtx assign_stack_temp PARAMS ((enum machine_mode, 1459 HOST_WIDE_INT, int)); 1460 extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode, 1461 HOST_WIDE_INT, int, tree)); 1462 extern rtx assign_temp PARAMS ((tree, int, int, int)); 1463 /* In emit-rtl.c */ 1464 extern rtx emit_insn_before PARAMS ((rtx, rtx)); 1465 extern rtx emit_insn_before_scope PARAMS ((rtx, rtx, tree)); 1466 extern rtx emit_jump_insn_before PARAMS ((rtx, rtx)); 1467 extern rtx emit_jump_insn_before_scope PARAMS ((rtx, rtx, tree)); 1468 extern rtx emit_call_insn_before PARAMS ((rtx, rtx)); 1469 extern rtx emit_call_insn_before_scope PARAMS ((rtx, rtx, tree)); 1470 extern rtx emit_barrier_before PARAMS ((rtx)); 1471 extern rtx emit_label_before PARAMS ((rtx, rtx)); 1472 extern rtx emit_note_before PARAMS ((int, rtx)); 1473 extern rtx emit_insn_after PARAMS ((rtx, rtx)); 1474 extern rtx emit_insn_after_scope PARAMS ((rtx, rtx, tree)); 1475 extern rtx emit_jump_insn_after PARAMS ((rtx, rtx)); 1476 extern rtx emit_jump_insn_after_scope PARAMS ((rtx, rtx, tree)); 1477 extern rtx emit_call_insn_after PARAMS ((rtx, rtx)); 1478 extern rtx emit_call_insn_after_scope PARAMS ((rtx, rtx, tree)); 1479 extern rtx emit_barrier_after PARAMS ((rtx)); 1480 extern rtx emit_label_after PARAMS ((rtx, rtx)); 1481 extern rtx emit_note_after PARAMS ((int, rtx)); 1482 extern rtx emit_line_note_after PARAMS ((const char *, int, rtx)); 1483 extern rtx emit_insn PARAMS ((rtx)); 1484 extern rtx emit_jump_insn PARAMS ((rtx)); 1485 extern rtx emit_call_insn PARAMS ((rtx)); 1486 extern rtx emit_label PARAMS ((rtx)); 1487 extern rtx emit_barrier PARAMS ((void)); 1488 extern rtx emit_line_note PARAMS ((const char *, int)); 1489 extern rtx emit_note PARAMS ((const char *, int)); 1490 extern rtx emit_line_note_force PARAMS ((const char *, int)); 1491 extern rtx make_insn_raw PARAMS ((rtx)); 1492 extern rtx previous_insn PARAMS ((rtx)); 1493 extern rtx next_insn PARAMS ((rtx)); 1494 extern rtx prev_nonnote_insn PARAMS ((rtx)); 1495 extern rtx next_nonnote_insn PARAMS ((rtx)); 1496 extern rtx prev_real_insn PARAMS ((rtx)); 1497 extern rtx next_real_insn PARAMS ((rtx)); 1498 extern rtx prev_active_insn PARAMS ((rtx)); 1499 extern rtx next_active_insn PARAMS ((rtx)); 1500 extern int active_insn_p PARAMS ((rtx)); 1501 extern rtx prev_label PARAMS ((rtx)); 1502 extern rtx next_label PARAMS ((rtx)); 1503 extern rtx next_cc0_user PARAMS ((rtx)); 1504 extern rtx prev_cc0_setter PARAMS ((rtx)); 1505 1506 /* In cfglayout.c */ 1507 extern tree choose_inner_scope PARAMS ((tree, tree)); 1508 1509 /* In jump.c */ 1510 extern rtx next_nondeleted_insn PARAMS ((rtx)); 1511 extern enum rtx_code reverse_condition PARAMS ((enum rtx_code)); 1512 extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code)); 1513 extern enum rtx_code swap_condition PARAMS ((enum rtx_code)); 1514 extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code)); 1515 extern enum rtx_code signed_condition PARAMS ((enum rtx_code)); 1516 extern void mark_jump_label PARAMS ((rtx, rtx, int)); 1517 extern void cleanup_barriers PARAMS ((void)); 1518 1519 /* In jump.c */ 1520 extern bool squeeze_notes PARAMS ((rtx *, rtx *)); 1521 extern rtx delete_related_insns PARAMS ((rtx)); 1522 extern void delete_jump PARAMS ((rtx)); 1523 extern void delete_barrier PARAMS ((rtx)); 1524 extern rtx get_label_before PARAMS ((rtx)); 1525 extern rtx get_label_after PARAMS ((rtx)); 1526 extern rtx follow_jumps PARAMS ((rtx)); 1527 1528 /* In recog.c */ 1529 extern rtx *find_constant_term_loc PARAMS ((rtx *)); 1530 1531 /* In emit-rtl.c */ 1532 extern rtx try_split PARAMS ((rtx, rtx, int)); 1533 extern int split_branch_probability; 1534 1535 /* In unknown file */ 1536 extern rtx split_insns PARAMS ((rtx, rtx)); 1537 1538 /* In simplify-rtx.c */ 1539 extern rtx simplify_unary_operation PARAMS ((enum rtx_code, 1540 enum machine_mode, rtx, 1541 enum machine_mode)); 1542 extern rtx simplify_binary_operation PARAMS ((enum rtx_code, 1543 enum machine_mode, rtx, 1544 rtx)); 1545 extern rtx simplify_ternary_operation PARAMS ((enum rtx_code, 1546 enum machine_mode, 1547 enum machine_mode, rtx, rtx, 1548 rtx)); 1549 extern rtx simplify_relational_operation PARAMS ((enum rtx_code, 1550 enum machine_mode, rtx, 1551 rtx)); 1552 extern rtx simplify_gen_binary PARAMS ((enum rtx_code, 1553 enum machine_mode, 1554 rtx, rtx)); 1555 extern rtx simplify_gen_unary PARAMS ((enum rtx_code, 1556 enum machine_mode, rtx, 1557 enum machine_mode)); 1558 extern rtx simplify_gen_ternary PARAMS ((enum rtx_code, 1559 enum machine_mode, 1560 enum machine_mode, 1561 rtx, rtx, rtx)); 1562 extern rtx simplify_gen_relational PARAMS ((enum rtx_code, 1563 enum machine_mode, 1564 enum machine_mode, 1565 rtx, rtx)); 1566 extern rtx simplify_subreg PARAMS ((enum machine_mode, 1567 rtx, 1568 enum machine_mode, 1569 unsigned int)); 1570 extern rtx simplify_gen_subreg PARAMS ((enum machine_mode, 1571 rtx, 1572 enum machine_mode, 1573 unsigned int)); 1574 extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx)); 1575 extern rtx simplify_rtx PARAMS ((rtx)); 1576 extern rtx avoid_constant_pool_reference PARAMS ((rtx)); 1577 1578 /* In function.c */ 1579 extern rtx gen_mem_addressof PARAMS ((rtx, tree, int)); 1580 1581 /* In regclass.c */ 1582 extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int, 1583 unsigned int)); 1584 1585 /* In emit-rtl.c */ 1586 extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx)); 1587 1588 /* Functions in rtlanal.c */ 1589 1590 /* Single set is implemented as macro for performance reasons. */ 1591 #define single_set(I) (INSN_P (I) \ 1592 ? (GET_CODE (PATTERN (I)) == SET \ 1593 ? PATTERN (I) : single_set_1 (I)) \ 1594 : NULL_RTX) 1595 #define single_set_1(I) single_set_2 (I, PATTERN (I)) 1596 1597 extern int rtx_addr_can_trap_p PARAMS ((rtx)); 1598 extern int rtx_unstable_p PARAMS ((rtx)); 1599 extern int rtx_varies_p PARAMS ((rtx, int)); 1600 extern int rtx_addr_varies_p PARAMS ((rtx, int)); 1601 extern HOST_WIDE_INT get_integer_term PARAMS ((rtx)); 1602 extern rtx get_related_value PARAMS ((rtx)); 1603 extern rtx get_jump_table_offset PARAMS ((rtx, rtx *)); 1604 extern int global_reg_mentioned_p PARAMS ((rtx)); 1605 extern int reg_mentioned_p PARAMS ((rtx, rtx)); 1606 extern int count_occurrences PARAMS ((rtx, rtx, int)); 1607 extern int reg_referenced_p PARAMS ((rtx, rtx)); 1608 extern int reg_used_between_p PARAMS ((rtx, rtx, rtx)); 1609 extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx)); 1610 extern int reg_set_between_p PARAMS ((rtx, rtx, rtx)); 1611 extern int regs_set_between_p PARAMS ((rtx, rtx, rtx)); 1612 extern int commutative_operand_precedence PARAMS ((rtx)); 1613 extern int swap_commutative_operands_p PARAMS ((rtx, rtx)); 1614 extern int modified_between_p PARAMS ((rtx, rtx, rtx)); 1615 extern int no_labels_between_p PARAMS ((rtx, rtx)); 1616 extern int no_jumps_between_p PARAMS ((rtx, rtx)); 1617 extern int modified_in_p PARAMS ((rtx, rtx)); 1618 extern int insn_dependent_p PARAMS ((rtx, rtx)); 1619 extern int reg_set_p PARAMS ((rtx, rtx)); 1620 extern rtx single_set_2 PARAMS ((rtx, rtx)); 1621 extern int multiple_sets PARAMS ((rtx)); 1622 extern int set_noop_p PARAMS ((rtx)); 1623 extern int noop_move_p PARAMS ((rtx)); 1624 extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int)); 1625 extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int, 1626 rtx, rtx *)); 1627 extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx)); 1628 extern rtx set_of PARAMS ((rtx, rtx)); 1629 extern void note_stores PARAMS ((rtx, 1630 void (*) (rtx, rtx, void *), 1631 void *)); 1632 extern void note_uses PARAMS ((rtx *, 1633 void (*) (rtx *, void *), 1634 void *)); 1635 extern rtx reg_set_last PARAMS ((rtx, rtx)); 1636 extern int dead_or_set_p PARAMS ((rtx, rtx)); 1637 extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int)); 1638 extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx)); 1639 extern rtx find_regno_note PARAMS ((rtx, enum reg_note, 1640 unsigned int)); 1641 extern rtx find_reg_equal_equiv_note PARAMS ((rtx)); 1642 extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx)); 1643 extern int find_regno_fusage PARAMS ((rtx, enum rtx_code, 1644 unsigned int)); 1645 extern int pure_call_p PARAMS ((rtx)); 1646 extern void remove_note PARAMS ((rtx, rtx)); 1647 extern int side_effects_p PARAMS ((rtx)); 1648 extern int volatile_refs_p PARAMS ((rtx)); 1649 extern int volatile_insn_p PARAMS ((rtx)); 1650 extern int may_trap_p PARAMS ((rtx)); 1651 extern int inequality_comparisons_p PARAMS ((rtx)); 1652 extern rtx replace_rtx PARAMS ((rtx, rtx, rtx)); 1653 extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int, 1654 int)); 1655 extern int computed_jump_p PARAMS ((rtx)); 1656 typedef int (*rtx_function) PARAMS ((rtx *, void *)); 1657 extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *)); 1658 extern rtx regno_use_in PARAMS ((unsigned int, rtx)); 1659 extern int auto_inc_p PARAMS ((rtx)); 1660 extern int in_expr_list_p PARAMS ((rtx, rtx)); 1661 extern void remove_node_from_expr_list PARAMS ((rtx, rtx *)); 1662 extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *)); 1663 extern int loc_mentioned_in_p PARAMS ((rtx *, rtx)); 1664 extern rtx find_first_parameter_load PARAMS ((rtx, rtx)); 1665 extern bool keep_with_call_p PARAMS ((rtx)); 1666 1667 /* flow.c */ 1668 1669 extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT)); 1670 1671 /* lists.c */ 1672 1673 void free_EXPR_LIST_list PARAMS ((rtx *)); 1674 void free_INSN_LIST_list PARAMS ((rtx *)); 1675 void free_EXPR_LIST_node PARAMS ((rtx)); 1676 void free_INSN_LIST_node PARAMS ((rtx)); 1677 rtx alloc_INSN_LIST PARAMS ((rtx, rtx)); 1678 rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx)); 1679 1680 /* regclass.c */ 1681 1682 /* Maximum number of parallel sets and clobbers in any insn in this fn. 1683 Always at least 3, since the combiner could put that many togetherm 1684 and we want this to remain correct for all the remaining passes. */ 1685 1686 extern int max_parallel; 1687 1688 /* Free up register info memory. */ 1689 extern void free_reg_info PARAMS ((void)); 1690 1691 /* recog.c */ 1692 extern int asm_noperands PARAMS ((rtx)); 1693 extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **, 1694 const char **, 1695 enum machine_mode *)); 1696 1697 extern enum reg_class reg_preferred_class PARAMS ((int)); 1698 extern enum reg_class reg_alternate_class PARAMS ((int)); 1699 1700 extern rtx get_first_nonparm_insn PARAMS ((void)); 1701 1702 extern void split_all_insns PARAMS ((int)); 1703 extern void split_all_insns_noflow PARAMS ((void)); 1704 1705 #define MAX_SAVED_CONST_INT 64 1706 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; 1707 1708 #define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT]) 1709 #define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1]) 1710 #define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2]) 1711 #define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1]) 1712 extern GTY(()) rtx const_true_rtx; 1713 1714 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; 1715 1716 /* Returns a constant 0 rtx in mode MODE. Integer modes are treated the 1717 same as VOIDmode. */ 1718 1719 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) 1720 1721 /* Likewise, for the constants 1 and 2. */ 1722 1723 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) 1724 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) 1725 1726 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg 1727 is used to represent the frame pointer. This is because the 1728 hard frame pointer and the automatic variables are separated by an amount 1729 that cannot be determined until after register allocation. We can assume 1730 that in this case ELIMINABLE_REGS will be defined, one action of which 1731 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ 1732 #ifndef HARD_FRAME_POINTER_REGNUM 1733 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM 1734 #endif 1735 1736 /* Index labels for global_rtl. */ 1737 enum global_rtl_index 1738 { 1739 GR_PC, 1740 GR_CC0, 1741 GR_STACK_POINTER, 1742 GR_FRAME_POINTER, 1743 /* For register elimination to work properly these hard_frame_pointer_rtx, 1744 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to 1745 the same register. */ 1746 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1747 GR_ARG_POINTER = GR_FRAME_POINTER, 1748 #endif 1749 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM 1750 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER, 1751 #else 1752 GR_HARD_FRAME_POINTER, 1753 #endif 1754 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM 1755 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1756 GR_ARG_POINTER = GR_HARD_FRAME_POINTER, 1757 #else 1758 GR_ARG_POINTER, 1759 #endif 1760 #endif 1761 GR_VIRTUAL_INCOMING_ARGS, 1762 GR_VIRTUAL_STACK_ARGS, 1763 GR_VIRTUAL_STACK_DYNAMIC, 1764 GR_VIRTUAL_OUTGOING_ARGS, 1765 GR_VIRTUAL_CFA, 1766 1767 GR_MAX 1768 }; 1769 1770 /* Pointers to standard pieces of rtx are stored here. */ 1771 extern GTY(()) rtx global_rtl[GR_MAX]; 1772 1773 /* Standard pieces of rtx, to be substituted directly into things. */ 1774 #define pc_rtx (global_rtl[GR_PC]) 1775 #define cc0_rtx (global_rtl[GR_CC0]) 1776 1777 /* All references to certain hard regs, except those created 1778 by allocating pseudo regs into them (when that's possible), 1779 go through these unique rtx objects. */ 1780 #define stack_pointer_rtx (global_rtl[GR_STACK_POINTER]) 1781 #define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER]) 1782 #define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER]) 1783 #define arg_pointer_rtx (global_rtl[GR_ARG_POINTER]) 1784 1785 extern GTY(()) rtx pic_offset_table_rtx; 1786 extern GTY(()) rtx struct_value_rtx; 1787 extern GTY(()) rtx struct_value_incoming_rtx; 1788 extern GTY(()) rtx static_chain_rtx; 1789 extern GTY(()) rtx static_chain_incoming_rtx; 1790 extern GTY(()) rtx return_address_pointer_rtx; 1791 1792 /* Include the RTL generation functions. */ 1793 1794 #ifndef NO_GENRTL_H 1795 #include "genrtl.h" 1796 #endif 1797 1798 /* There are some RTL codes that require special attention; the 1799 generation functions included above do the raw handling. If you 1800 add to this list, modify special_rtx in gengenrtl.c as well. You 1801 should also modify gen_rtx to use the special function. */ 1802 1803 extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT)); 1804 extern rtx gen_rtx_CONST_VECTOR PARAMS ((enum machine_mode, rtvec)); 1805 extern rtx gen_raw_REG PARAMS ((enum machine_mode, int)); 1806 extern rtx gen_rtx_REG PARAMS ((enum machine_mode, unsigned)); 1807 extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int)); 1808 extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx)); 1809 1810 extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx)); 1811 1812 /* We need the cast here to ensure that we get the same result both with 1813 and without prototypes. */ 1814 #define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N)) 1815 1816 /* Virtual registers are used during RTL generation to refer to locations into 1817 the stack frame when the actual location isn't known until RTL generation 1818 is complete. The routine instantiate_virtual_regs replaces these with 1819 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus 1820 a constant. */ 1821 1822 #define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) 1823 1824 /* This points to the first word of the incoming arguments passed on the stack, 1825 either by the caller or by the callee when pretending it was passed by the 1826 caller. */ 1827 1828 #define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS]) 1829 1830 #define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) 1831 1832 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first 1833 variable on the stack. Otherwise, it points to the first variable on 1834 the stack. */ 1835 1836 #define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS]) 1837 1838 #define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) 1839 1840 /* This points to the location of dynamically-allocated memory on the stack 1841 immediately after the stack pointer has been adjusted by the amount 1842 desired. */ 1843 1844 #define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC]) 1845 1846 #define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) 1847 1848 /* This points to the location in the stack at which outgoing arguments should 1849 be written when the stack is pre-pushed (arguments pushed using push 1850 insns always use sp). */ 1851 1852 #define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS]) 1853 1854 #define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) 1855 1856 /* This points to the Canonical Frame Address of the function. This 1857 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET, 1858 but is calculated relative to the arg pointer for simplicity; the 1859 frame pointer nor stack pointer are necessarily fixed relative to 1860 the CFA until after reload. */ 1861 1862 #define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA]) 1863 1864 #define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4) 1865 1866 #define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4) 1867 1868 /* Nonzero if REGNUM is a pointer into the stack frame. */ 1869 #define REGNO_PTR_FRAME_P(REGNUM) \ 1870 ((REGNUM) == STACK_POINTER_REGNUM \ 1871 || (REGNUM) == FRAME_POINTER_REGNUM \ 1872 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \ 1873 || (REGNUM) == ARG_POINTER_REGNUM \ 1874 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \ 1875 && (REGNUM) <= LAST_VIRTUAL_REGISTER)) 1876 1877 /* REGNUM never really appearing in the INSN stream. */ 1878 #define INVALID_REGNUM (~(unsigned int) 0) 1879 1880 extern rtx find_next_ref PARAMS ((rtx, rtx)); 1881 1882 extern rtx output_constant_def PARAMS ((tree, int)); 1883 1884 /* Define a default value for STORE_FLAG_VALUE. */ 1885 1886 #ifndef STORE_FLAG_VALUE 1887 #define STORE_FLAG_VALUE 1 1888 #endif 1889 1890 /* Nonzero after the second flow pass has completed. 1891 Set to 1 or 0 by toplev.c */ 1892 extern int flow2_completed; 1893 1894 /* Nonzero after end of reload pass. 1895 Set to 1 or 0 by reload1.c. */ 1896 1897 extern int reload_completed; 1898 1899 /* Set to 1 while reload_as_needed is operating. 1900 Required by some machines to handle any generated moves differently. */ 1901 1902 extern int reload_in_progress; 1903 1904 /* If this is nonzero, we do not bother generating VOLATILE 1905 around volatile memory references, and we are willing to 1906 output indirect addresses. If cse is to follow, we reject 1907 indirect addresses so a useful potential cse is generated; 1908 if it is used only once, instruction combination will produce 1909 the same indirect address eventually. */ 1910 extern int cse_not_expected; 1911 1912 /* Set to nonzero before life analysis to indicate that it is unsafe to 1913 generate any new pseudo registers. */ 1914 extern int no_new_pseudos; 1915 1916 /* Translates rtx code to tree code, for those codes needed by 1917 REAL_ARITHMETIC. The function returns an int because the caller may not 1918 know what `enum tree_code' means. */ 1919 1920 extern int rtx_to_tree_code PARAMS ((enum rtx_code)); 1921 1922 /* In tree.c */ 1923 struct obstack; 1924 extern void gcc_obstack_init PARAMS ((struct obstack *)); 1925 1926 /* In cse.c */ 1927 struct cse_basic_block_data; 1928 1929 /* Return the right cost to give to an operation 1930 to make the cost of the corresponding register-to-register instruction 1931 N times that of a fast register-to-register instruction. */ 1932 #define COSTS_N_INSNS(N) ((N) * 4) 1933 1934 /* Maximum cost of a rtl expression. This value has the special meaning 1935 not to use an rtx with this cost under any circumstances. */ 1936 #define MAX_COST INT_MAX 1937 1938 extern int rtx_cost PARAMS ((rtx, enum rtx_code)); 1939 extern int address_cost PARAMS ((rtx, enum machine_mode)); 1940 extern int delete_trivially_dead_insns PARAMS ((rtx, int)); 1941 #ifdef BUFSIZ 1942 extern int cse_main PARAMS ((rtx, int, int, FILE *)); 1943 #endif 1944 extern void cse_end_of_basic_block PARAMS ((rtx, 1945 struct cse_basic_block_data *, 1946 int, int, int)); 1947 extern void cse_condition_code_reg PARAMS ((void)); 1948 extern enum machine_mode default_cc_modes_compatible PARAMS ((enum machine_mode, 1949 enum machine_mode)); 1950 1951 /* In jump.c */ 1952 extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code)); 1953 extern int condjump_p PARAMS ((rtx)); 1954 extern int any_condjump_p PARAMS ((rtx)); 1955 extern int any_uncondjump_p PARAMS ((rtx)); 1956 extern int safe_to_remove_jump_p PARAMS ((rtx)); 1957 extern rtx pc_set PARAMS ((rtx)); 1958 extern rtx condjump_label PARAMS ((rtx)); 1959 extern int simplejump_p PARAMS ((rtx)); 1960 extern int tablejump_p PARAMS ((rtx)); 1961 extern int returnjump_p PARAMS ((rtx)); 1962 extern int onlyjump_p PARAMS ((rtx)); 1963 extern int only_sets_cc0_p PARAMS ((rtx)); 1964 extern int sets_cc0_p PARAMS ((rtx)); 1965 extern int invert_jump_1 PARAMS ((rtx, rtx)); 1966 extern int invert_jump PARAMS ((rtx, rtx, int)); 1967 extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx)); 1968 extern int true_regnum PARAMS ((rtx)); 1969 extern unsigned int reg_or_subregno PARAMS ((rtx)); 1970 extern int redirect_jump_1 PARAMS ((rtx, rtx)); 1971 extern int redirect_jump PARAMS ((rtx, rtx, int)); 1972 extern void rebuild_jump_labels PARAMS ((rtx)); 1973 extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx)); 1974 extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code, 1975 rtx, rtx, rtx)); 1976 extern void delete_for_peephole PARAMS ((rtx, rtx)); 1977 extern int condjump_in_parallel_p PARAMS ((rtx)); 1978 extern void never_reached_warning PARAMS ((rtx, rtx)); 1979 extern void purge_line_number_notes PARAMS ((rtx)); 1980 extern void copy_loop_headers PARAMS ((rtx)); 1981 1982 /* In emit-rtl.c. */ 1983 extern int max_reg_num PARAMS ((void)); 1984 extern int max_label_num PARAMS ((void)); 1985 extern int get_first_label_num PARAMS ((void)); 1986 extern void delete_insns_since PARAMS ((rtx)); 1987 extern void mark_reg_pointer PARAMS ((rtx, int)); 1988 extern void mark_user_reg PARAMS ((rtx)); 1989 extern void reset_used_flags PARAMS ((rtx)); 1990 extern void reorder_insns PARAMS ((rtx, rtx, rtx)); 1991 extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx)); 1992 extern int get_max_uid PARAMS ((void)); 1993 extern int in_sequence_p PARAMS ((void)); 1994 extern void force_next_line_note PARAMS ((void)); 1995 extern void init_emit PARAMS ((void)); 1996 extern void init_emit_once PARAMS ((int)); 1997 extern void push_topmost_sequence PARAMS ((void)); 1998 extern void pop_topmost_sequence PARAMS ((void)); 1999 extern int subreg_realpart_p PARAMS ((rtx)); 2000 extern void reverse_comparison PARAMS ((rtx)); 2001 extern void set_new_first_and_last_insn PARAMS ((rtx, rtx)); 2002 extern void set_new_first_and_last_label_num PARAMS ((int, int)); 2003 extern void set_new_last_label_num PARAMS ((int)); 2004 extern void unshare_all_rtl_again PARAMS ((rtx)); 2005 extern void set_first_insn PARAMS ((rtx)); 2006 extern void set_last_insn PARAMS ((rtx)); 2007 extern void link_cc0_insns PARAMS ((rtx)); 2008 extern void add_insn PARAMS ((rtx)); 2009 extern void add_insn_before PARAMS ((rtx, rtx)); 2010 extern void add_insn_after PARAMS ((rtx, rtx)); 2011 extern void remove_insn PARAMS ((rtx)); 2012 extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx)); 2013 extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx)); 2014 extern enum rtx_code classify_insn PARAMS ((rtx)); 2015 extern rtx emit PARAMS ((rtx)); 2016 /* Query and clear/ restore no_line_numbers. This is used by the 2017 switch / case handling in stmt.c to give proper line numbers in 2018 warnings about unreachable code. */ 2019 int force_line_numbers PARAMS ((void)); 2020 void restore_line_number_status PARAMS ((int old_value)); 2021 extern void renumber_insns PARAMS ((FILE *)); 2022 extern void remove_unnecessary_notes PARAMS ((void)); 2023 extern rtx delete_insn PARAMS ((rtx)); 2024 extern void delete_insn_chain PARAMS ((rtx, rtx)); 2025 extern rtx delete_insn_and_edges PARAMS ((rtx)); 2026 extern void delete_insn_chain_and_edges PARAMS ((rtx, rtx)); 2027 2028 /* In combine.c */ 2029 extern int combine_instructions PARAMS ((rtx, unsigned int)); 2030 extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int)); 2031 extern rtx remove_death PARAMS ((unsigned int, rtx)); 2032 #ifdef BUFSIZ 2033 extern void dump_combine_stats PARAMS ((FILE *)); 2034 extern void dump_combine_total_stats PARAMS ((FILE *)); 2035 #endif 2036 2037 /* In sched.c. */ 2038 #ifdef BUFSIZ 2039 extern void schedule_insns PARAMS ((FILE *)); 2040 extern void schedule_ebbs PARAMS ((FILE *)); 2041 #endif 2042 extern void fix_sched_param PARAMS ((const char *, const char *)); 2043 2044 /* In print-rtl.c */ 2045 extern const char *print_rtx_head; 2046 extern void debug_rtx PARAMS ((rtx)); 2047 extern void debug_rtx_list PARAMS ((rtx, int)); 2048 extern void debug_rtx_range PARAMS ((rtx, rtx)); 2049 extern rtx debug_rtx_find PARAMS ((rtx, int)); 2050 #ifdef BUFSIZ 2051 extern void print_mem_expr PARAMS ((FILE *, tree)); 2052 extern void print_rtl PARAMS ((FILE *, rtx)); 2053 extern void print_simple_rtl PARAMS ((FILE *, rtx)); 2054 extern int print_rtl_single PARAMS ((FILE *, rtx)); 2055 extern void print_inline_rtx PARAMS ((FILE *, rtx, int)); 2056 #endif 2057 2058 /* In loop.c */ 2059 extern void init_loop PARAMS ((void)); 2060 extern rtx libcall_other_reg PARAMS ((rtx, rtx)); 2061 #ifdef BUFSIZ 2062 extern void loop_optimize PARAMS ((rtx, FILE *, int)); 2063 #endif 2064 extern void record_excess_regs PARAMS ((rtx, rtx, rtx *)); 2065 2066 /* In function.c */ 2067 extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx)); 2068 extern void thread_prologue_and_epilogue_insns PARAMS ((rtx)); 2069 extern int prologue_epilogue_contains PARAMS ((rtx)); 2070 extern int sibcall_epilogue_contains PARAMS ((rtx)); 2071 extern void preserve_rtl_expr_result PARAMS ((rtx)); 2072 extern void mark_temp_addr_taken PARAMS ((rtx)); 2073 extern void update_temp_slot_address PARAMS ((rtx, rtx)); 2074 extern void purge_addressof PARAMS ((rtx)); 2075 extern void purge_hard_subreg_sets PARAMS ((rtx)); 2076 2077 /* In stmt.c */ 2078 extern void set_file_and_line_for_stmt PARAMS ((const char *, int)); 2079 extern void expand_null_return PARAMS ((void)); 2080 extern void emit_jump PARAMS ((rtx)); 2081 extern int preserve_subexpressions_p PARAMS ((void)); 2082 2083 /* In expr.c */ 2084 extern void move_by_pieces PARAMS ((rtx, rtx, 2085 unsigned HOST_WIDE_INT, 2086 unsigned int)); 2087 2088 /* In flow.c */ 2089 extern void recompute_reg_usage PARAMS ((rtx, int)); 2090 extern int initialize_uninitialized_subregs PARAMS ((void)); 2091 extern void delete_dead_jumptables PARAMS ((void)); 2092 #ifdef BUFSIZ 2093 extern void print_rtl_with_bb PARAMS ((FILE *, rtx)); 2094 extern void dump_flow_info PARAMS ((FILE *)); 2095 #endif 2096 2097 /* In expmed.c */ 2098 extern void init_expmed PARAMS ((void)); 2099 extern void expand_inc PARAMS ((rtx, rtx)); 2100 extern void expand_dec PARAMS ((rtx, rtx)); 2101 extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx, 2102 unsigned HOST_WIDE_INT, rtx, 2103 int, int)); 2104 2105 /* In gcse.c */ 2106 #ifdef BUFSIZ 2107 extern int gcse_main PARAMS ((rtx, FILE *)); 2108 #endif 2109 2110 /* In global.c */ 2111 extern void mark_elimination PARAMS ((int, int)); 2112 #ifdef BUFSIZ 2113 extern int global_alloc PARAMS ((FILE *)); 2114 extern void dump_global_regs PARAMS ((FILE *)); 2115 #endif 2116 #ifdef HARD_CONST 2117 /* Yes, this ifdef is silly, but HARD_REG_SET is not always defined. */ 2118 extern void retry_global_alloc PARAMS ((int, HARD_REG_SET)); 2119 #endif 2120 extern void build_insn_chain PARAMS ((rtx)); 2121 2122 /* In regclass.c */ 2123 extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class)); 2124 extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class)); 2125 extern void globalize_reg PARAMS ((int)); 2126 extern void init_regs PARAMS ((void)); 2127 extern void init_fake_stack_mems PARAMS ((void)); 2128 extern void init_reg_sets PARAMS ((void)); 2129 extern void regset_release_memory PARAMS ((void)); 2130 extern void regclass_init PARAMS ((void)); 2131 extern void regclass PARAMS ((rtx, int, FILE *)); 2132 extern void reg_scan PARAMS ((rtx, unsigned int, int)); 2133 extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int)); 2134 extern void fix_register PARAMS ((const char *, int, int)); 2135 extern void init_subregs_of_mode PARAMS ((void)); 2136 extern void record_subregs_of_mode PARAMS ((rtx)); 2137 #ifdef HARD_CONST 2138 extern void cannot_change_mode_set_regs PARAMS ((HARD_REG_SET *, 2139 enum machine_mode, 2140 unsigned int)); 2141 #endif 2142 extern bool invalid_mode_change_p PARAMS ((unsigned int, 2143 enum reg_class, 2144 enum machine_mode)); 2145 2146 extern int delete_null_pointer_checks PARAMS ((rtx)); 2147 2148 /* In regmove.c */ 2149 #ifdef BUFSIZ 2150 extern void regmove_optimize PARAMS ((rtx, int, FILE *)); 2151 #endif 2152 extern void combine_stack_adjustments PARAMS ((void)); 2153 2154 /* In reorg.c */ 2155 #ifdef BUFSIZ 2156 extern void dbr_schedule PARAMS ((rtx, FILE *)); 2157 #endif 2158 2159 /* In local-alloc.c */ 2160 #ifdef BUFSIZ 2161 extern void dump_local_alloc PARAMS ((FILE *)); 2162 #endif 2163 extern int local_alloc PARAMS ((void)); 2164 extern int function_invariant_p PARAMS ((rtx)); 2165 2166 /* In profile.c */ 2167 extern void init_branch_prob PARAMS ((const char *)); 2168 extern void branch_prob PARAMS ((void)); 2169 extern void end_branch_prob PARAMS ((void)); 2170 extern void output_func_start_profiler PARAMS ((void)); 2171 2172 /* In reg-stack.c */ 2173 #ifdef BUFSIZ 2174 extern void reg_to_stack PARAMS ((rtx, FILE *)); 2175 #endif 2176 2177 /* In fold-const.c */ 2178 extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2179 unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2180 unsigned HOST_WIDE_INT *, 2181 HOST_WIDE_INT *)); 2182 extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2183 unsigned HOST_WIDE_INT *, 2184 HOST_WIDE_INT *)); 2185 extern int mul_double PARAMS ((unsigned HOST_WIDE_INT, 2186 HOST_WIDE_INT, 2187 unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2188 unsigned HOST_WIDE_INT *, 2189 HOST_WIDE_INT *)); 2190 extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2191 HOST_WIDE_INT, unsigned int, 2192 unsigned HOST_WIDE_INT *, 2193 HOST_WIDE_INT *, int)); 2194 extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2195 HOST_WIDE_INT, unsigned int, 2196 unsigned HOST_WIDE_INT *, 2197 HOST_WIDE_INT *, int)); 2198 extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2199 HOST_WIDE_INT, unsigned int, 2200 unsigned HOST_WIDE_INT *, 2201 HOST_WIDE_INT *)); 2202 extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2203 HOST_WIDE_INT, unsigned int, 2204 unsigned HOST_WIDE_INT *, 2205 HOST_WIDE_INT *)); 2206 2207 /* In calls.c */ 2208 enum libcall_type 2209 { 2210 LCT_NORMAL = 0, 2211 LCT_CONST = 1, 2212 LCT_PURE = 2, 2213 LCT_CONST_MAKE_BLOCK = 3, 2214 LCT_PURE_MAKE_BLOCK = 4, 2215 LCT_NORETURN = 5, 2216 LCT_THROW = 6, 2217 LCT_ALWAYS_RETURN = 7, 2218 LCT_RETURNS_TWICE = 8 2219 }; 2220 2221 extern void emit_library_call PARAMS ((rtx, enum libcall_type, 2222 enum machine_mode, int, 2223 ...)); 2224 extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type, 2225 enum machine_mode, int, 2226 ...)); 2227 2228 /* In unroll.c */ 2229 extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx)); 2230 2231 /* In varasm.c */ 2232 extern int in_data_section PARAMS ((void)); 2233 extern void init_varasm_once PARAMS ((void)); 2234 2235 /* In rtl.c */ 2236 extern void init_rtl PARAMS ((void)); 2237 extern void traverse_md_constants PARAMS ((int (*) (void **, void *), 2238 void *)); 2239 struct md_constant { char *name, *value; }; 2240 2241 #ifdef BUFSIZ 2242 extern int read_skip_spaces PARAMS ((FILE *)); 2243 extern rtx read_rtx PARAMS ((FILE *)); 2244 #endif 2245 2246 extern const char *read_rtx_filename; 2247 extern int read_rtx_lineno; 2248 2249 /* Redefine abort to report an internal error w/o coredump, and 2250 reporting the location of the error in the source file. This logic 2251 is duplicated in rtl.h and tree.h because every file that needs the 2252 special abort includes one or both. toplev.h gets too few files, 2253 system.h gets too many. */ 2254 2255 extern void fancy_abort PARAMS ((const char *, int, const char *)) 2256 ATTRIBUTE_NORETURN; 2257 #define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__) 2258 2259 /* In alias.c */ 2260 extern void clear_reg_alias_info PARAMS ((rtx)); 2261 extern rtx canon_rtx PARAMS ((rtx)); 2262 extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx, 2263 int (*)(rtx, int))); 2264 extern rtx get_addr PARAMS ((rtx)); 2265 extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx, 2266 rtx, int (*)(rtx, int))); 2267 extern int read_dependence PARAMS ((rtx, rtx)); 2268 extern int anti_dependence PARAMS ((rtx, rtx)); 2269 extern int output_dependence PARAMS ((rtx, rtx)); 2270 extern void mark_constant_function PARAMS ((void)); 2271 extern void init_alias_once PARAMS ((void)); 2272 extern void init_alias_analysis PARAMS ((void)); 2273 extern void end_alias_analysis PARAMS ((void)); 2274 extern rtx addr_side_effect_eval PARAMS ((rtx, int, int)); 2275 extern rtx get_reg_known_value PARAMS ((unsigned int)); 2276 extern bool get_reg_known_equiv_p PARAMS ((unsigned int)); 2277 2278 /* In sibcall.c */ 2279 typedef enum { 2280 sibcall_use_normal = 1, 2281 sibcall_use_tail_recursion, 2282 sibcall_use_sibcall 2283 } sibcall_use_t; 2284 2285 extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void)); 2286 extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t)); 2287 2288 #ifdef STACK_REGS 2289 extern int stack_regs_mentioned PARAMS ((rtx insn)); 2290 #endif 2291 2292 /* In toplev.c */ 2293 extern GTY(()) rtx stack_limit_rtx; 2294 2295 /* In regrename.c */ 2296 extern void regrename_optimize PARAMS ((void)); 2297 extern void copyprop_hardreg_forward PARAMS ((void)); 2298 2299 /* In ifcvt.c */ 2300 extern void if_convert PARAMS ((int)); 2301 2302 /* In predict.c */ 2303 extern void invert_br_probabilities PARAMS ((rtx)); 2304 extern bool expensive_function_p PARAMS ((int)); 2305 /* In tracer.c */ 2306 extern void tracer PARAMS ((void)); 2307 2308 #endif /* ! GCC_RTL_H */ 2309