rtl.h revision 90075
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 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 59 Temple Place - Suite 330, Boston, MA 2002111-1307, USA. */ 21 22#ifndef GCC_RTL_H 23#define GCC_RTL_H 24 25struct function; 26 27#include "machmode.h" 28 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 41enum 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 54extern const unsigned char rtx_length[NUM_RTX_CODE]; 55#define GET_RTX_LENGTH(CODE) (rtx_length[(int) (CODE)]) 56 57extern const char * const rtx_name[NUM_RTX_CODE]; 58#define GET_RTX_NAME(CODE) (rtx_name[(int) (CODE)]) 59 60extern const char * const rtx_format[NUM_RTX_CODE]; 61#define GET_RTX_FORMAT(CODE) (rtx_format[(int) (CODE)]) 62 63extern const char rtx_class[NUM_RTX_CODE]; 64#define GET_RTX_CLASS(CODE) (rtx_class[(int) (CODE)]) 65 66/* The flags and bitfields of an ADDR_DIFF_VEC. BASE is the base label 67 relative to which the offsets are calculated, as explained in rtl.def. */ 68typedef struct 69{ 70 /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */ 71 unsigned min_align: 8; 72 /* Flags: */ 73 unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC. */ 74 unsigned min_after_vec: 1; /* minimum address target label is 75 after the ADDR_DIFF_VEC. */ 76 unsigned max_after_vec: 1; /* maximum address target label is 77 after the ADDR_DIFF_VEC. */ 78 unsigned min_after_base: 1; /* minimum address target label is 79 after BASE. */ 80 unsigned max_after_base: 1; /* maximum address target label is 81 after BASE. */ 82 /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */ 83 unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned. */ 84 unsigned : 2; 85 unsigned scale : 8; 86} addr_diff_vec_flags; 87 88/* Structure used to describe the attributes of a MEM. These are hashed 89 so MEMs that the same attributes share a data structure. This means 90 they cannot be modified in place. If any element is nonzero, it means 91 the value of the corresponding attribute is unknown. */ 92typedef struct 93{ 94 HOST_WIDE_INT alias; /* Memory alias set. */ 95 tree expr; /* expr corresponding to MEM. */ 96 rtx offset; /* Offset from start of DECL, as CONST_INT. */ 97 rtx size; /* Size in bytes, as a CONST_INT. */ 98 unsigned int align; /* Alignment of MEM in bits. */ 99} mem_attrs; 100 101/* Common union for an element of an rtx. */ 102 103typedef union rtunion_def 104{ 105 HOST_WIDE_INT rtwint; 106 int rtint; 107 unsigned int rtuint; 108 const char *rtstr; 109 rtx rtx; 110 rtvec rtvec; 111 enum machine_mode rttype; 112 addr_diff_vec_flags rt_addr_diff_vec_flags; 113 struct cselib_val_struct *rt_cselib; 114 struct bitmap_head_def *rtbit; 115 tree rttree; 116 struct basic_block_def *bb; 117 mem_attrs *rtmem; 118} rtunion; 119 120/* RTL expression ("rtx"). */ 121 122struct rtx_def 123{ 124 /* The kind of expression this is. */ 125 ENUM_BITFIELD(rtx_code) code: 16; 126 127 /* The kind of value the expression has. */ 128 ENUM_BITFIELD(machine_mode) mode : 8; 129 130 /* 1 in an INSN if it can alter flow of control 131 within this function. 132 MEM_KEEP_ALIAS_SET_P in a MEM. 133 LINK_COST_ZERO in an INSN_LIST. 134 SET_IS_RETURN_P in a SET. */ 135 unsigned int jump : 1; 136 /* 1 in an INSN if it can call another function. 137 LINK_COST_FREE in an INSN_LIST. */ 138 unsigned int call : 1; 139 /* 1 in a REG if value of this expression will never change during 140 the current function, even though it is not manifestly constant. 141 1 in a MEM if contents of memory are constant. This does not 142 necessarily mean that the value of this expression is constant. 143 1 in a SUBREG if it is from a promoted variable that is unsigned. 144 1 in a SYMBOL_REF if it addresses something in the per-function 145 constants pool. 146 1 in a CALL_INSN if it is a const call. 147 1 in a JUMP_INSN if it is a branch that should be annulled. Valid from 148 reorg until end of compilation; cleared before used. */ 149 unsigned int unchanging : 1; 150 /* 1 in a MEM expression if contents of memory are volatile. 151 1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL or BARRIER 152 if it is deleted. 153 1 in a REG expression if corresponds to a variable declared by the user. 154 0 for an internally generated temporary. 155 In a SYMBOL_REF, this flag is used for machine-specific purposes. 156 In a LABEL_REF or in a REG_LABEL note, this is LABEL_REF_NONLOCAL_P. */ 157 unsigned int volatil : 1; 158 /* 1 in a MEM referring to a field of an aggregate. 159 0 if the MEM was a variable or the result of a * operator in C; 160 1 if it was the result of a . or -> operator (on a struct) in C. 161 1 in a REG if the register is used only in exit code a loop. 162 1 in a SUBREG expression if was generated from a variable with a 163 promoted mode. 164 1 in a CODE_LABEL if the label is used for nonlocal gotos 165 and must not be deleted even if its count is zero. 166 1 in a LABEL_REF if this is a reference to a label outside the 167 current loop. 168 1 in an INSN, JUMP_INSN, or CALL_INSN if this insn must be scheduled 169 together with the preceding insn. Valid only within sched. 170 1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and 171 from the target of a branch. Valid from reorg until end of compilation; 172 cleared before used. 173 1 in an INSN if this insn is dead code. Valid only during 174 dead-code elimination phase; cleared before use. */ 175 unsigned int in_struct : 1; 176 /* 1 if this rtx is used. This is used for copying shared structure. 177 See `unshare_all_rtl'. 178 In a REG, this is not needed for that purpose, and used instead 179 in `leaf_renumber_regs_insn'. 180 In a SYMBOL_REF, means that emit_library_call 181 has used it as the function. */ 182 unsigned int used : 1; 183 /* Nonzero if this rtx came from procedure integration. 184 In a REG, nonzero means this reg refers to the return value 185 of the current function. 186 1 in a SYMBOL_REF if the symbol is weak. */ 187 unsigned integrated : 1; 188 /* 1 in an INSN or a SET if this rtx is related to the call frame, 189 either changing how we compute the frame address or saving and 190 restoring registers in the prologue and epilogue. 191 1 in a MEM if the MEM refers to a scalar, rather than a member of 192 an aggregate. 193 1 in a REG if the register is a pointer. 194 1 in a SYMBOL_REF if it addresses something in the per-function 195 constant string pool. */ 196 unsigned frame_related : 1; 197 198 /* The first element of the operands of this rtx. 199 The number of operands and their types are controlled 200 by the `code' field, according to rtl.def. */ 201 rtunion fld[1]; 202}; 203 204#define NULL_RTX (rtx) 0 205 206/* Define macros to access the `code' field of the rtx. */ 207 208#define GET_CODE(RTX) ((enum rtx_code) (RTX)->code) 209#define PUT_CODE(RTX, CODE) ((RTX)->code = (ENUM_BITFIELD(rtx_code)) (CODE)) 210 211#define GET_MODE(RTX) ((enum machine_mode) (RTX)->mode) 212#define PUT_MODE(RTX, MODE) ((RTX)->mode = (ENUM_BITFIELD(machine_mode)) (MODE)) 213 214#define RTX_INTEGRATED_P(RTX) ((RTX)->integrated) 215#define RTX_UNCHANGING_P(RTX) ((RTX)->unchanging) 216#define RTX_FRAME_RELATED_P(RTX) ((RTX)->frame_related) 217 218/* RTL vector. These appear inside RTX's when there is a need 219 for a variable number of things. The principle use is inside 220 PARALLEL expressions. */ 221 222struct rtvec_def { 223 int num_elem; /* number of elements */ 224 rtx elem[1]; 225}; 226 227#define NULL_RTVEC (rtvec) 0 228 229#define GET_NUM_ELEM(RTVEC) ((RTVEC)->num_elem) 230#define PUT_NUM_ELEM(RTVEC, NUM) ((RTVEC)->num_elem = (NUM)) 231 232/* Predicate yielding nonzero iff X is an rtl for a register. */ 233#define REG_P(X) (GET_CODE (X) == REG) 234 235/* Predicate yielding nonzero iff X is a label insn. */ 236#define LABEL_P(X) (GET_CODE (X) == CODE_LABEL) 237 238/* Predicate yielding nonzero iff X is a jump insn. */ 239#define JUMP_P(X) (GET_CODE (X) == JUMP_INSN) 240 241/* Predicate yielding nonzero iff X is a note insn. */ 242#define NOTE_P(X) (GET_CODE (X) == NOTE) 243 244/* Predicate yielding nonzero iff X is a barrier insn. */ 245#define BARRIER_P(X) (GET_CODE (X) == BARRIER) 246 247/* Predicate yielding nonzero iff X is a data for a jump table. */ 248#define JUMP_TABLE_DATA_P(INSN) \ 249 (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \ 250 GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC)) 251 252/* 1 if X is a constant value that is an integer. */ 253 254#define CONSTANT_P(X) \ 255 (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 256 || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE \ 257 || GET_CODE (X) == CONST || GET_CODE (X) == HIGH \ 258 || GET_CODE (X) == CONSTANT_P_RTX) 259 260/* General accessor macros for accessing the fields of an rtx. */ 261 262#if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007) 263/* The bit with a star outside the statement expr and an & inside is 264 so that N can be evaluated only once. */ 265#define RTL_CHECK1(RTX, N, C1) __extension__ \ 266(*({ rtx _rtx = (RTX); int _n = (N); \ 267 enum rtx_code _code = GET_CODE (_rtx); \ 268 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 269 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 270 __FUNCTION__); \ 271 if (GET_RTX_FORMAT(_code)[_n] != C1) \ 272 rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__, \ 273 __FUNCTION__); \ 274 &_rtx->fld[_n]; })) 275 276#define RTL_CHECK2(RTX, N, C1, C2) __extension__ \ 277(*({ rtx _rtx = (RTX); int _n = (N); \ 278 enum rtx_code _code = GET_CODE (_rtx); \ 279 if (_n < 0 || _n >= GET_RTX_LENGTH (_code)) \ 280 rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__, \ 281 __FUNCTION__); \ 282 if (GET_RTX_FORMAT(_code)[_n] != C1 \ 283 && GET_RTX_FORMAT(_code)[_n] != C2) \ 284 rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__, \ 285 __FUNCTION__); \ 286 &_rtx->fld[_n]; })) 287 288#define RTL_CHECKC1(RTX, N, C) __extension__ \ 289(*({ rtx _rtx = (RTX); int _n = (N); \ 290 if (GET_CODE (_rtx) != (C)) \ 291 rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__, \ 292 __FUNCTION__); \ 293 &_rtx->fld[_n]; })) 294 295#define RTL_CHECKC2(RTX, N, C1, C2) __extension__ \ 296(*({ rtx _rtx = (RTX); int _n = (N); \ 297 enum rtx_code _code = GET_CODE (_rtx); \ 298 if (_code != (C1) && _code != (C2)) \ 299 rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__, \ 300 __FUNCTION__); \ 301 &_rtx->fld[_n]; })) 302 303#define RTVEC_ELT(RTVEC, I) __extension__ \ 304(*({ rtvec _rtvec = (RTVEC); int _i = (I); \ 305 if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec)) \ 306 rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__, \ 307 __FUNCTION__); \ 308 &_rtvec->elem[_i]; })) 309 310extern void rtl_check_failed_bounds PARAMS ((rtx, int, 311 const char *, int, const char *)) 312 ATTRIBUTE_NORETURN; 313extern void rtl_check_failed_type1 PARAMS ((rtx, int, int, 314 const char *, int, const char *)) 315 ATTRIBUTE_NORETURN; 316extern void rtl_check_failed_type2 PARAMS ((rtx, int, int, int, 317 const char *, int, const char *)) 318 ATTRIBUTE_NORETURN; 319extern void rtl_check_failed_code1 PARAMS ((rtx, enum rtx_code, 320 const char *, int, const char *)) 321 ATTRIBUTE_NORETURN; 322extern void rtl_check_failed_code2 PARAMS ((rtx, enum rtx_code, enum rtx_code, 323 const char *, int, const char *)) 324 ATTRIBUTE_NORETURN; 325extern void rtvec_check_failed_bounds PARAMS ((rtvec, int, 326 const char *, int, const char *)) 327 ATTRIBUTE_NORETURN; 328 329#else /* not ENABLE_RTL_CHECKING */ 330 331#define RTL_CHECK1(RTX, N, C1) ((RTX)->fld[N]) 332#define RTL_CHECK2(RTX, N, C1, C2) ((RTX)->fld[N]) 333#define RTL_CHECKC1(RTX, N, C) ((RTX)->fld[N]) 334#define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->fld[N]) 335#define RTVEC_ELT(RTVEC, I) ((RTVEC)->elem[I]) 336 337#endif 338 339#define XWINT(RTX, N) (RTL_CHECK1 (RTX, N, 'w').rtwint) 340#define XINT(RTX, N) (RTL_CHECK2 (RTX, N, 'i', 'n').rtint) 341#define XSTR(RTX, N) (RTL_CHECK2 (RTX, N, 's', 'S').rtstr) 342#define XEXP(RTX, N) (RTL_CHECK2 (RTX, N, 'e', 'u').rtx) 343#define XVEC(RTX, N) (RTL_CHECK2 (RTX, N, 'E', 'V').rtvec) 344#define XMODE(RTX, N) (RTL_CHECK1 (RTX, N, 'M').rttype) 345#define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rtbit) 346#define XTREE(RTX, N) (RTL_CHECK1 (RTX, N, 't').rttree) 347#define XBBDEF(RTX, N) (RTL_CHECK1 (RTX, N, 'B').bb) 348#define XTMPL(RTX, N) (RTL_CHECK1 (RTX, N, 'T').rtstr) 349 350#define XVECEXP(RTX, N, M) RTVEC_ELT (XVEC (RTX, N), M) 351#define XVECLEN(RTX, N) GET_NUM_ELEM (XVEC (RTX, N)) 352 353/* These are like XWINT, etc. except that they expect a '0' field instead 354 of the normal type code. */ 355 356#define X0WINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtwint) 357#define X0INT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtint) 358#define X0UINT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtuint) 359#define X0STR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtstr) 360#define X0EXP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtx) 361#define X0VEC(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtvec) 362#define X0MODE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttype) 363#define X0BITMAP(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtbit) 364#define X0TREE(RTX, N) (RTL_CHECK1 (RTX, N, '0').rttree) 365#define X0BBDEF(RTX, N) (RTL_CHECK1 (RTX, N, '0').bb) 366#define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags) 367#define X0CSELIB(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_cselib) 368#define X0MEMATTR(RTX, N) (RTL_CHECK1 (RTX, N, '0').rtmem) 369 370#define XCWINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtwint) 371#define XCINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtint) 372#define XCUINT(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtuint) 373#define XCSTR(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtstr) 374#define XCEXP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtx) 375#define XCVEC(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtvec) 376#define XCMODE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttype) 377#define XCBITMAP(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rtbit) 378#define XCTREE(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rttree) 379#define XCBBDEF(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).bb) 380#define XCADVFLAGS(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_addr_diff_vec_flags) 381#define XCCSELIB(RTX, N, C) (RTL_CHECKC1 (RTX, N, C).rt_cselib) 382 383#define XCVECEXP(RTX, N, M, C) RTVEC_ELT (XCVEC (RTX, N, C), M) 384#define XCVECLEN(RTX, N, C) GET_NUM_ELEM (XCVEC (RTX, N, C)) 385 386#define XC2EXP(RTX, N, C1, C2) (RTL_CHECKC2 (RTX, N, C1, C2).rtx) 387 388/* ACCESS MACROS for particular fields of insns. */ 389 390/* Determines whether X is an insn. */ 391#define INSN_P(X) (GET_RTX_CLASS (GET_CODE(X)) == 'i') 392 393/* Holds a unique number for each insn. 394 These are not necessarily sequentially increasing. */ 395#define INSN_UID(INSN) XINT (INSN, 0) 396 397/* Chain insns together in sequence. */ 398#define PREV_INSN(INSN) XEXP (INSN, 1) 399#define NEXT_INSN(INSN) XEXP (INSN, 2) 400 401/* The body of an insn. */ 402#define PATTERN(INSN) XEXP (INSN, 3) 403 404/* Code number of instruction, from when it was recognized. 405 -1 means this instruction has not been recognized yet. */ 406#define INSN_CODE(INSN) XINT (INSN, 4) 407 408/* Set up in flow.c; empty before then. 409 Holds a chain of INSN_LIST rtx's whose first operands point at 410 previous insns with direct data-flow connections to this one. 411 That means that those insns set variables whose next use is in this insn. 412 They are always in the same basic block as this insn. */ 413#define LOG_LINKS(INSN) XEXP(INSN, 5) 414 415/* 1 if insn has been deleted. */ 416#define INSN_DELETED_P(INSN) ((INSN)->volatil) 417 418/* 1 if insn is a call to a const or pure function. */ 419#define CONST_OR_PURE_CALL_P(INSN) ((INSN)->unchanging) 420 421/* 1 if insn (assumed to be a CALL_INSN) is a sibling call. */ 422#define SIBLING_CALL_P(INSN) ((INSN)->jump) 423 424/* 1 if insn is a branch that should not unconditionally execute its 425 delay slots, i.e., it is an annulled branch. */ 426#define INSN_ANNULLED_BRANCH_P(INSN) ((INSN)->unchanging) 427 428/* 1 if insn is a dead code. Valid only for dead-code elimination phase. */ 429#define INSN_DEAD_CODE_P(INSN) ((INSN)->in_struct) 430 431/* 1 if insn is in a delay slot and is from the target of the branch. If 432 the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be 433 executed if the branch is taken. For annulled branches with this bit 434 clear, the insn should be executed only if the branch is not taken. */ 435#define INSN_FROM_TARGET_P(INSN) ((INSN)->in_struct) 436 437#define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4) 438 439#define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0) 440 441/* Holds a list of notes on what this insn does to various REGs. 442 It is a chain of EXPR_LIST rtx's, where the second operand is the 443 chain pointer and the first operand is the REG being described. 444 The mode field of the EXPR_LIST contains not a real machine mode 445 but a value from enum reg_note. */ 446 447#define REG_NOTES(INSN) XEXP(INSN, 6) 448 449/* Don't forget to change reg_note_name in rtl.c. */ 450enum reg_note 451{ 452 /* The value in REG dies in this insn (i.e., it is not needed past 453 this insn). If REG is set in this insn, the REG_DEAD note may, 454 but need not, be omitted. */ 455 REG_DEAD = 1, 456 457 /* The REG is autoincremented or autodecremented. */ 458 REG_INC, 459 460 /* Describes the insn as a whole; it says that the insn sets a register 461 to a constant value or to be equivalent to a memory address. If the 462 register is spilled to the stack then the constant value should be 463 substituted for it. The contents of the REG_EQUIV is the constant 464 value or memory address, which may be different from the source of 465 the SET although it has the same value. A REG_EQUIV note may also 466 appear on an insn which copies a register parameter to a pseudo-register, 467 if there is a memory address which could be used to hold that 468 pseudo-register throughout the function. */ 469 REG_EQUIV, 470 471 /* Like REG_EQUIV except that the destination is only momentarily equal 472 to the specified rtx. Therefore, it cannot be used for substitution; 473 but it can be used for cse. */ 474 REG_EQUAL, 475 476 /* The register set in this insn held 0 before the insn. The contents of 477 the note is the insn that stored the 0. If that insn is deleted or 478 patched to a NOTE, the REG_WAS_0 is inoperative. The REG_WAS_0 note 479 is actually an INSN_LIST, not an EXPR_LIST. */ 480 REG_WAS_0, 481 482 /* This insn copies the return-value of a library call out of the hard reg 483 for return values. This note is actually an INSN_LIST and it points to 484 the first insn involved in setting up arguments for the call. flow.c 485 uses this to delete the entire library call when its result is dead. */ 486 REG_RETVAL, 487 488 /* The inverse of REG_RETVAL: it goes on the first insn of the library call 489 and points at the one that has the REG_RETVAL. This note is also an 490 INSN_LIST. */ 491 REG_LIBCALL, 492 493 /* The register is always nonnegative during the containing loop. This is 494 used in branches so that decrement and branch instructions terminating 495 on zero can be matched. There must be an insn pattern in the md file 496 named `decrement_and_branch_until_zero' or else this will never be added 497 to any instructions. */ 498 REG_NONNEG, 499 500 /* There is no conflict *after this insn* between the register in the note 501 and the destination of this insn. */ 502 REG_NO_CONFLICT, 503 504 /* Identifies a register set in this insn and never used. */ 505 REG_UNUSED, 506 507 /* REG_CC_SETTER and REG_CC_USER link a pair of insns that set and use CC0, 508 respectively. Normally, these are required to be consecutive insns, but 509 we permit putting a cc0-setting insn in the delay slot of a branch as 510 long as only one copy of the insn exists. In that case, these notes 511 point from one to the other to allow code generation to determine what 512 any require information and to properly update CC_STATUS. These notes 513 are INSN_LISTs. */ 514 REG_CC_SETTER, REG_CC_USER, 515 516 /* Points to a CODE_LABEL. Used by non-JUMP_INSNs to say that the 517 CODE_LABEL contained in the REG_LABEL note is used by the insn. 518 This note is an INSN_LIST. */ 519 REG_LABEL, 520 521 /* REG_DEP_ANTI and REG_DEP_OUTPUT are used in LOG_LINKS to represent 522 write-after-read and write-after-write dependencies respectively. 523 Data dependencies, which are the only type of LOG_LINK created by 524 flow, are represented by a 0 reg note kind. */ 525 REG_DEP_ANTI, REG_DEP_OUTPUT, 526 527 /* REG_BR_PROB is attached to JUMP_INSNs and CALL_INSNs. 528 It has an integer value. For jumps, it is the probability that this is a 529 taken branch. For calls, it is the probability that this call won't 530 return. */ 531 REG_BR_PROB, 532 533 /* REG_EXEC_COUNT is attached to the first insn of each basic block, and 534 the first insn after each CALL_INSN. It indicates how many times this 535 block was executed. */ 536 REG_EXEC_COUNT, 537 538 /* Attached to a call insn; indicates that the call is malloc-like and 539 that the pointer returned cannot alias anything else. */ 540 REG_NOALIAS, 541 542 /* Used to optimize rtl generated by dynamic stack allocations for targets 543 where SETJMP_VIA_SAVE_AREA is true. */ 544 REG_SAVE_AREA, 545 546 /* REG_BR_PRED is attached to JUMP_INSNs and CALL_INSNSs. It contains 547 CONCAT of two integer value. First specifies the branch predictor 548 that added the note, second specifies the predicted hitrate of branch 549 in the same format as REG_BR_PROB note uses. */ 550 REG_BR_PRED, 551 552 /* Attached to insns that are RTX_FRAME_RELATED_P, but are too complex 553 for DWARF to interpret what they imply. The attached rtx is used 554 instead of intuition. */ 555 REG_FRAME_RELATED_EXPR, 556 557 /* Indicates that REG holds the exception context for the function. 558 This context is shared by inline functions, so the code to acquire 559 the real exception context is delayed until after inlining. */ 560 REG_EH_CONTEXT, 561 562 /* Indicates what exception region an INSN belongs in. This is used to 563 indicate what region to which a call may throw. REGION 0 indicates 564 that a call cannot throw at all. REGION -1 indicates that it cannot 565 throw, nor will it execute a non-local goto. */ 566 REG_EH_REGION, 567 568 /* Used by haifa-sched to save NOTE_INSN notes across scheduling. */ 569 REG_SAVE_NOTE, 570 571 /* Indicates that this insn (which is part of the prologue) computes 572 a value which might not be used later, and if so it's OK to delete 573 the insn. Normally, deleting any insn in the prologue is an error. 574 At present the parameter is unused and set to (const_int 0). */ 575 REG_MAYBE_DEAD, 576 577 /* Indicates that a call does not return. */ 578 REG_NORETURN, 579 580 /* Indicates that an indirect jump is a non-local goto instead of a 581 computed goto. */ 582 REG_NON_LOCAL_GOTO, 583 584 /* This kind of note is generated at each to `setjmp', 585 and similar functions that can return twice. */ 586 REG_SETJMP, 587 588 /* Indicate calls that always returns. */ 589 REG_ALWAYS_RETURN, 590 591 /* Indicate that the memory load references a vtable. The expression 592 is of the form (plus (symbol_ref vtable_sym) (const_int offset)). */ 593 REG_VTABLE_REF 594}; 595 596/* The base value for branch probability notes. */ 597#define REG_BR_PROB_BASE 10000 598 599/* Define macros to extract and insert the reg-note kind in an EXPR_LIST. */ 600#define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK)) 601#define PUT_REG_NOTE_KIND(LINK, KIND) \ 602 PUT_MODE (LINK, (enum machine_mode) (KIND)) 603 604/* Names for REG_NOTE's in EXPR_LIST insn's. */ 605 606extern const char * const reg_note_name[]; 607#define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)]) 608 609/* This field is only present on CALL_INSNs. It holds a chain of EXPR_LIST of 610 USE and CLOBBER expressions. 611 USE expressions list the registers filled with arguments that 612 are passed to the function. 613 CLOBBER expressions document the registers explicitly clobbered 614 by this CALL_INSN. 615 Pseudo registers can not be mentioned in this list. */ 616#define CALL_INSN_FUNCTION_USAGE(INSN) XEXP(INSN, 7) 617 618/* The label-number of a code-label. The assembler label 619 is made from `L' and the label-number printed in decimal. 620 Label numbers are unique in a compilation. */ 621#define CODE_LABEL_NUMBER(INSN) XINT (INSN, 5) 622 623#define LINE_NUMBER NOTE 624 625/* In a NOTE that is a line number, this is a string for the file name that the 626 line is in. We use the same field to record block numbers temporarily in 627 NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes. (We avoid lots of casts 628 between ints and pointers if we use a different macro for the block number.) 629 The NOTE_INSN_RANGE_{START,END} and NOTE_INSN_LIVE notes record their 630 information as an rtx in the field. */ 631 632#define NOTE_SOURCE_FILE(INSN) XCSTR (INSN, 3, NOTE) 633#define NOTE_BLOCK(INSN) XCTREE (INSN, 3, NOTE) 634#define NOTE_EH_HANDLER(INSN) XCINT (INSN, 3, NOTE) 635#define NOTE_RANGE_INFO(INSN) XCEXP (INSN, 3, NOTE) 636#define NOTE_LIVE_INFO(INSN) XCEXP (INSN, 3, NOTE) 637#define NOTE_BASIC_BLOCK(INSN) XCBBDEF (INSN, 3, NOTE) 638#define NOTE_EXPECTED_VALUE(INSN) XCEXP (INSN, 3, NOTE) 639 640/* In a NOTE that is a line number, this is the line number. 641 Other kinds of NOTEs are identified by negative numbers here. */ 642#define NOTE_LINE_NUMBER(INSN) XCINT (INSN, 4, NOTE) 643 644/* Nonzero if INSN is a note marking the beginning of a basic block. */ 645#define NOTE_INSN_BASIC_BLOCK_P(INSN) \ 646 (GET_CODE (INSN) == NOTE \ 647 && NOTE_LINE_NUMBER (INSN) == NOTE_INSN_BASIC_BLOCK) 648 649/* Codes that appear in the NOTE_LINE_NUMBER field 650 for kinds of notes that are not line numbers. 651 652 Notice that we do not try to use zero here for any of 653 the special note codes because sometimes the source line 654 actually can be zero! This happens (for example) when we 655 are generating code for the per-translation-unit constructor 656 and destructor routines for some C++ translation unit. 657 658 If you should change any of the following values, or if you 659 should add a new value here, don't forget to change the 660 note_insn_name array in rtl.c. */ 661 662enum insn_note 663{ 664 /* Keep all of these numbers negative. Adjust as needed. */ 665 NOTE_INSN_BIAS = -100, 666 667 /* This note is used to get rid of an insn 668 when it isn't safe to patch the insn out of the chain. */ 669 NOTE_INSN_DELETED, 670 671 /* These are used to mark the beginning and end of a lexical block. 672 See NOTE_BLOCK, identify_blocks and reorder_blocks. */ 673 NOTE_INSN_BLOCK_BEG, 674 NOTE_INSN_BLOCK_END, 675 676 /* These mark the extremes of a loop. */ 677 NOTE_INSN_LOOP_BEG, 678 NOTE_INSN_LOOP_END, 679 680 /* Generated at the place in a loop that `continue' jumps to. */ 681 NOTE_INSN_LOOP_CONT, 682 /* Generated at the start of a duplicated exit test. */ 683 NOTE_INSN_LOOP_VTOP, 684 685 /* Generated at the end of a conditional at the top of the loop. 686 This is used to perform a lame form of loop rotation in lieu 687 of actually understanding the loop structure. The note is 688 discarded after rotation is complete. */ 689 NOTE_INSN_LOOP_END_TOP_COND, 690 691 /* This kind of note is generated at the end of the function body, 692 just before the return insn or return label. In an optimizing 693 compilation it is deleted by the first jump optimization, after 694 enabling that optimizer to determine whether control can fall 695 off the end of the function body without a return statement. */ 696 NOTE_INSN_FUNCTION_END, 697 698 /* This marks the point immediately after the last prologue insn. */ 699 NOTE_INSN_PROLOGUE_END, 700 701 /* This marks the point immediately prior to the first epilogue insn. */ 702 NOTE_INSN_EPILOGUE_BEG, 703 704 /* Generated in place of user-declared labels when they are deleted. */ 705 NOTE_INSN_DELETED_LABEL, 706 707 /* This note indicates the start of the real body of the function, 708 i.e. the point just after all of the parms have been moved into 709 their homes, etc. */ 710 NOTE_INSN_FUNCTION_BEG, 711 712 /* These note where exception handling regions begin and end. 713 Uses NOTE_EH_HANDLER to identify the region in question. */ 714 NOTE_INSN_EH_REGION_BEG, 715 NOTE_INSN_EH_REGION_END, 716 717 /* Generated whenever a duplicate line number note is output. For example, 718 one is output after the end of an inline function, in order to prevent 719 the line containing the inline call from being counted twice in gcov. */ 720 NOTE_INSN_REPEATED_LINE_NUMBER, 721 722 /* Start/end of a live range region, where pseudos allocated on the stack 723 can be allocated to temporary registers. Uses NOTE_RANGE_INFO. */ 724 NOTE_INSN_RANGE_BEG, 725 NOTE_INSN_RANGE_END, 726 727 /* Record which registers are currently live. Uses NOTE_LIVE_INFO. */ 728 NOTE_INSN_LIVE, 729 730 /* Record the struct for the following basic block. Uses NOTE_BASIC_BLOCK. */ 731 NOTE_INSN_BASIC_BLOCK, 732 733 /* Record the expected value of a register at a location. Uses 734 NOTE_EXPECTED_VALUE; stored as (eq (reg) (const_int)). */ 735 NOTE_INSN_EXPECTED_VALUE, 736 737 NOTE_INSN_MAX 738}; 739 740/* Names for NOTE insn's other than line numbers. */ 741 742extern const char * const note_insn_name[NOTE_INSN_MAX - NOTE_INSN_BIAS]; 743#define GET_NOTE_INSN_NAME(NOTE_CODE) \ 744 (note_insn_name[(NOTE_CODE) - (int) NOTE_INSN_BIAS]) 745 746/* The name of a label, in case it corresponds to an explicit label 747 in the input source code. */ 748#define LABEL_NAME(RTX) XCSTR (RTX, 6, CODE_LABEL) 749 750/* In jump.c, each label contains a count of the number 751 of LABEL_REFs that point at it, so unused labels can be deleted. */ 752#define LABEL_NUSES(RTX) XCINT (RTX, 3, CODE_LABEL) 753 754/* Associate a name with a CODE_LABEL. */ 755#define LABEL_ALTERNATE_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL) 756 757/* The original regno this ADDRESSOF was built for. */ 758#define ADDRESSOF_REGNO(RTX) XCUINT (RTX, 1, ADDRESSOF) 759 760/* The variable in the register we took the address of. */ 761#define ADDRESSOF_DECL(RTX) XCTREE (RTX, 2, ADDRESSOF) 762 763/* In jump.c, each JUMP_INSN can point to a label that it can jump to, 764 so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can 765 be decremented and possibly the label can be deleted. */ 766#define JUMP_LABEL(INSN) XCEXP (INSN, 7, JUMP_INSN) 767 768/* Once basic blocks are found in flow.c, 769 each CODE_LABEL starts a chain that goes through 770 all the LABEL_REFs that jump to that label. 771 The chain eventually winds up at the CODE_LABEL: it is circular. */ 772#define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL) 773 774/* This is the field in the LABEL_REF through which the circular chain 775 of references to a particular label is linked. 776 This chain is set up in flow.c. */ 777 778#define LABEL_NEXTREF(REF) XCEXP (REF, 1, LABEL_REF) 779 780/* Once basic blocks are found in flow.c, 781 Each LABEL_REF points to its containing instruction with this field. */ 782 783#define CONTAINING_INSN(RTX) XCEXP (RTX, 2, LABEL_REF) 784 785/* For a REG rtx, REGNO extracts the register number. ORIGINAL_REGNO holds 786 the number the register originally had; for a pseudo register turned into 787 a hard reg this will hold the old pseudo register number. */ 788 789#define REGNO(RTX) XCUINT (RTX, 0, REG) 790#define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1) 791 792/* For a REG rtx, REG_FUNCTION_VALUE_P is nonzero if the reg 793 is the current function's return value. */ 794 795#define REG_FUNCTION_VALUE_P(RTX) ((RTX)->integrated) 796 797/* 1 in a REG rtx if it corresponds to a variable declared by the user. */ 798#define REG_USERVAR_P(RTX) ((RTX)->volatil) 799 800/* 1 in a REG rtx if the register is a pointer. */ 801#define REG_POINTER(RTX) ((RTX)->frame_related) 802 803/* 1 if the given register REG corresponds to a hard register. */ 804#define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG))) 805 806/* 1 if the given register number REG_NO corresponds to a hard register. */ 807#define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER) 808 809/* For a CONST_INT rtx, INTVAL extracts the integer. */ 810 811#define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT) 812 813/* For a CONST_DOUBLE: 814 The usual two ints that hold the value. 815 For a DImode, that is all there are; 816 and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order. 817 For a float, the number of ints varies, 818 and CONST_DOUBLE_LOW is the one that should come first *in memory*. 819 So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */ 820#define CONST_DOUBLE_LOW(r) XCWINT (r, 1, CONST_DOUBLE) 821#define CONST_DOUBLE_HIGH(r) XCWINT (r, 2, CONST_DOUBLE) 822 823/* Link for chain of all CONST_DOUBLEs in use in current function. */ 824#define CONST_DOUBLE_CHAIN(r) XCEXP (r, 0, CONST_DOUBLE) 825 826/* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of. 827 SUBREG_BYTE extracts the byte-number. */ 828 829#define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG) 830#define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG) 831 832/* in rtlanal.c */ 833extern unsigned int subreg_lsb PARAMS ((rtx)); 834extern unsigned int subreg_regno_offset PARAMS ((unsigned int, 835 enum machine_mode, 836 unsigned int, 837 enum machine_mode)); 838extern unsigned int subreg_regno PARAMS ((rtx)); 839 840/* 1 if the REG contained in SUBREG_REG is already known to be 841 sign- or zero-extended from the mode of the SUBREG to the mode of 842 the reg. SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the 843 extension. 844 845 When used as a LHS, is means that this extension must be done 846 when assigning to SUBREG_REG. */ 847 848#define SUBREG_PROMOTED_VAR_P(RTX) ((RTX)->in_struct) 849#define SUBREG_PROMOTED_UNSIGNED_P(RTX) ((RTX)->unchanging) 850 851/* Access various components of an ASM_OPERANDS rtx. */ 852 853#define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS) 854#define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS) 855#define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS) 856#define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS) 857#define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS) 858#define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS) 859#define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS) 860#define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \ 861 XCVECEXP (RTX, 4, N, ASM_OPERANDS) 862#define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \ 863 XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0) 864#define ASM_OPERANDS_INPUT_MODE(RTX, N) \ 865 GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS)) 866#define ASM_OPERANDS_SOURCE_FILE(RTX) XCSTR (RTX, 5, ASM_OPERANDS) 867#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS) 868 869/* For a MEM RTX, 1 if we should keep the alias set for this mem 870 unchanged when we access a component. Set to 1, or example, when we 871 are already in a non-addressable component of an aggregate. */ 872#define MEM_KEEP_ALIAS_SET_P(RTX) ((RTX)->jump) 873 874/* For a MEM rtx, 1 if it's a volatile reference. 875 Also in an ASM_OPERANDS rtx. */ 876#define MEM_VOLATILE_P(RTX) ((RTX)->volatil) 877 878/* For a MEM rtx, 1 if it refers to an aggregate, either to the 879 aggregate itself of to a field of the aggregate. If zero, RTX may 880 or may not be such a reference. */ 881#define MEM_IN_STRUCT_P(RTX) ((RTX)->in_struct) 882 883/* For a MEM rtx, 1 if it refers to a scalar. If zero, RTX may or may 884 not refer to a scalar. */ 885#define MEM_SCALAR_P(RTX) ((RTX)->frame_related) 886 887/* If VAL is non-zero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in 888 RTX. Otherwise, vice versa. Use this macro only when you are 889 *sure* that you know that the MEM is in a structure, or is a 890 scalar. VAL is evaluated only once. */ 891#define MEM_SET_IN_STRUCT_P(RTX, VAL) \ 892do { \ 893 if (VAL) \ 894 { \ 895 MEM_IN_STRUCT_P (RTX) = 1; \ 896 MEM_SCALAR_P (RTX) = 0; \ 897 } \ 898 else \ 899 { \ 900 MEM_IN_STRUCT_P (RTX) = 0; \ 901 MEM_SCALAR_P (RTX) = 1; \ 902 } \ 903} while (0) 904 905/* The memory attribute block. We provide access macros for each value 906 in the block and provide defaults if none specified. */ 907#define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1) 908 909/* For a MEM rtx, the alias set. If 0, this MEM is not in any alias 910 set, and may alias anything. Otherwise, the MEM can only alias 911 MEMs in the same alias set. This value is set in a 912 language-dependent manner in the front-end, and should not be 913 altered in the back-end. These set numbers are tested for zero, 914 and compared for equality; they have no other significance. In 915 some front-ends, these numbers may correspond in some way to types, 916 or other language-level entities, but they need not, and the 917 back-end makes no such assumptions. */ 918#define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias) 919 920/* For a MEM rtx, the decl it is known to refer to, if it is known to 921 refer to part of a DECL. It may also be a COMPONENT_REF. */ 922#define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr) 923 924/* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a 925 RTX that is always a CONST_INT. */ 926#define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset) 927 928/* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that 929 is always a CONST_INT. */ 930#define MEM_SIZE(RTX) \ 931(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size \ 932 : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \ 933 : 0) 934 935/* For a MEM rtx, the alignment in bits. We can use the alignment of the 936 mode as a default when STRICT_ALIGNMENT, but not if not. */ 937#define MEM_ALIGN(RTX) \ 938(MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align \ 939 : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode \ 940 ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT)) 941 942/* Copy the attributes that apply to memory locations from RHS to LHS. */ 943#define MEM_COPY_ATTRIBUTES(LHS, RHS) \ 944 (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS), \ 945 MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \ 946 MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \ 947 RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \ 948 MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \ 949 MEM_ATTRS (LHS) = MEM_ATTRS (RHS)) 950 951/* For a LABEL_REF, 1 means that this reference is to a label outside the 952 loop containing the reference. */ 953#define LABEL_OUTSIDE_LOOP_P(RTX) ((RTX)->in_struct) 954 955/* For a LABEL_REF, 1 means it is for a nonlocal label. */ 956/* Likewise in an EXPR_LIST for a REG_LABEL note. */ 957#define LABEL_REF_NONLOCAL_P(RTX) ((RTX)->volatil) 958 959/* For a CODE_LABEL, 1 means always consider this label to be needed. */ 960#define LABEL_PRESERVE_P(RTX) ((RTX)->in_struct) 961 962/* For a REG, 1 means the register is used only in an exit test of a loop. */ 963#define REG_LOOP_TEST_P(RTX) ((RTX)->in_struct) 964 965/* During sched, for an insn, 1 means that the insn must be scheduled together 966 with the preceding insn. */ 967#define SCHED_GROUP_P(INSN) ((INSN)->in_struct) 968 969/* During sched, for the LOG_LINKS of an insn, these cache the adjusted 970 cost of the dependence link. The cost of executing an instruction 971 may vary based on how the results are used. LINK_COST_ZERO is 1 when 972 the cost through the link varies and is unchanged (i.e., the link has 973 zero additional cost). LINK_COST_FREE is 1 when the cost through the 974 link is zero (i.e., the link makes the cost free). In other cases, 975 the adjustment to the cost is recomputed each time it is needed. */ 976#define LINK_COST_ZERO(X) ((X)->jump) 977#define LINK_COST_FREE(X) ((X)->call) 978 979/* For a SET rtx, SET_DEST is the place that is set 980 and SET_SRC is the value it is set to. */ 981#define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER) 982#define SET_SRC(RTX) XCEXP(RTX, 1, SET) 983#define SET_IS_RETURN_P(RTX) ((RTX)->jump) 984 985/* For a TRAP_IF rtx, TRAP_CONDITION is an expression. */ 986#define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF) 987#define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF) 988 989/* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base 990 conditionally executing the code on, COND_EXEC_CODE is the code 991 to execute if the condition is true. */ 992#define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC) 993#define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC) 994 995/* 1 in a SYMBOL_REF if it addresses this function's constants pool. */ 996#define CONSTANT_POOL_ADDRESS_P(RTX) ((RTX)->unchanging) 997 998/* 1 in a SYMBOL_REF if it addresses this function's string constant pool. */ 999#define STRING_POOL_ADDRESS_P(RTX) ((RTX)->frame_related) 1000 1001/* Flag in a SYMBOL_REF for machine-specific purposes. */ 1002#define SYMBOL_REF_FLAG(RTX) ((RTX)->volatil) 1003 1004/* 1 means a SYMBOL_REF has been the library function in emit_library_call. */ 1005#define SYMBOL_REF_USED(RTX) ((RTX)->used) 1006 1007/* 1 means a SYMBOL_REF is weak. */ 1008#define SYMBOL_REF_WEAK(RTX) ((RTX)->integrated) 1009 1010/* Define a macro to look for REG_INC notes, 1011 but save time on machines where they never exist. */ 1012 1013/* Don't continue this line--convex cc version 4.1 would lose. */ 1014#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1015#define FIND_REG_INC_NOTE(INSN, REG) \ 1016 ((REG) != NULL_RTX && REG_P ((REG)) \ 1017 ? find_regno_note ((INSN), REG_INC, REGNO (REG)) \ 1018 : find_reg_note ((INSN), REG_INC, (REG))) 1019#else 1020#define FIND_REG_INC_NOTE(INSN, REG) 0 1021#endif 1022 1023/* Indicate whether the machine has any sort of auto increment addressing. 1024 If not, we can avoid checking for REG_INC notes. */ 1025 1026/* Don't continue this line--convex cc version 4.1 would lose. */ 1027#if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT)) 1028#define AUTO_INC_DEC 1029#endif 1030 1031#ifndef HAVE_PRE_INCREMENT 1032#define HAVE_PRE_INCREMENT 0 1033#endif 1034 1035#ifndef HAVE_PRE_DECREMENT 1036#define HAVE_PRE_DECREMENT 0 1037#endif 1038 1039#ifndef HAVE_POST_INCREMENT 1040#define HAVE_POST_INCREMENT 0 1041#endif 1042 1043#ifndef HAVE_POST_DECREMENT 1044#define HAVE_POST_DECREMENT 0 1045#endif 1046 1047#ifndef HAVE_POST_MODIFY_DISP 1048#define HAVE_POST_MODIFY_DISP 0 1049#endif 1050 1051#ifndef HAVE_POST_MODIFY_REG 1052#define HAVE_POST_MODIFY_REG 0 1053#endif 1054 1055#ifndef HAVE_PRE_MODIFY_DISP 1056#define HAVE_PRE_MODIFY_DISP 0 1057#endif 1058 1059#ifndef HAVE_PRE_MODIFY_REG 1060#define HAVE_PRE_MODIFY_REG 0 1061#endif 1062 1063 1064/* Some architectures do not have complete pre/post increment/decrement 1065 instruction sets, or only move some modes efficiently. These macros 1066 allow us to tune autoincrement generation. */ 1067 1068#ifndef USE_LOAD_POST_INCREMENT 1069#define USE_LOAD_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1070#endif 1071 1072#ifndef USE_LOAD_POST_DECREMENT 1073#define USE_LOAD_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1074#endif 1075 1076#ifndef USE_LOAD_PRE_INCREMENT 1077#define USE_LOAD_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1078#endif 1079 1080#ifndef USE_LOAD_PRE_DECREMENT 1081#define USE_LOAD_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1082#endif 1083 1084#ifndef USE_STORE_POST_INCREMENT 1085#define USE_STORE_POST_INCREMENT(MODE) HAVE_POST_INCREMENT 1086#endif 1087 1088#ifndef USE_STORE_POST_DECREMENT 1089#define USE_STORE_POST_DECREMENT(MODE) HAVE_POST_DECREMENT 1090#endif 1091 1092#ifndef USE_STORE_PRE_INCREMENT 1093#define USE_STORE_PRE_INCREMENT(MODE) HAVE_PRE_INCREMENT 1094#endif 1095 1096#ifndef USE_STORE_PRE_DECREMENT 1097#define USE_STORE_PRE_DECREMENT(MODE) HAVE_PRE_DECREMENT 1098#endif 1099 1100 1101/* Accessors for RANGE_INFO. */ 1102/* For RANGE_{START,END} notes return the RANGE_START note. */ 1103#define RANGE_INFO_NOTE_START(INSN) XCEXP (INSN, 0, RANGE_INFO) 1104 1105/* For RANGE_{START,END} notes return the RANGE_START note. */ 1106#define RANGE_INFO_NOTE_END(INSN) XCEXP (INSN, 1, RANGE_INFO) 1107 1108/* For RANGE_{START,END} notes, return the vector containing the registers used 1109 in the range. */ 1110#define RANGE_INFO_REGS(INSN) XCVEC (INSN, 2, RANGE_INFO) 1111#define RANGE_INFO_REGS_REG(INSN, N) XCVECEXP (INSN, 2, N, RANGE_INFO) 1112#define RANGE_INFO_NUM_REGS(INSN) XCVECLEN (INSN, 2, RANGE_INFO) 1113 1114/* For RANGE_{START,END} notes, the number of calls within the range. */ 1115#define RANGE_INFO_NCALLS(INSN) XCINT (INSN, 3, RANGE_INFO) 1116 1117/* For RANGE_{START,END} notes, the number of insns within the range. */ 1118#define RANGE_INFO_NINSNS(INSN) XCINT (INSN, 4, RANGE_INFO) 1119 1120/* For RANGE_{START,END} notes, a unique # to identify this range. */ 1121#define RANGE_INFO_UNIQUE(INSN) XCINT (INSN, 5, RANGE_INFO) 1122 1123/* For RANGE_{START,END} notes, the basic block # the range starts with. */ 1124#define RANGE_INFO_BB_START(INSN) XCINT (INSN, 6, RANGE_INFO) 1125 1126/* For RANGE_{START,END} notes, the basic block # the range ends with. */ 1127#define RANGE_INFO_BB_END(INSN) XCINT (INSN, 7, RANGE_INFO) 1128 1129/* For RANGE_{START,END} notes, the loop depth the range is in. */ 1130#define RANGE_INFO_LOOP_DEPTH(INSN) XCINT (INSN, 8, RANGE_INFO) 1131 1132/* For RANGE_{START,END} notes, the bitmap of live registers at the start 1133 of the range. */ 1134#define RANGE_INFO_LIVE_START(INSN) XCBITMAP (INSN, 9, RANGE_INFO) 1135 1136/* For RANGE_{START,END} notes, the bitmap of live registers at the end 1137 of the range. */ 1138#define RANGE_INFO_LIVE_END(INSN) XCBITMAP (INSN, 10, RANGE_INFO) 1139 1140/* For RANGE_START notes, the marker # of the start of the range. */ 1141#define RANGE_INFO_MARKER_START(INSN) XCINT (INSN, 11, RANGE_INFO) 1142 1143/* For RANGE_START notes, the marker # of the end of the range. */ 1144#define RANGE_INFO_MARKER_END(INSN) XCINT (INSN, 12, RANGE_INFO) 1145 1146/* Original pseudo register # for a live range note. */ 1147#define RANGE_REG_PSEUDO(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 0, REG) 1148 1149/* Pseudo register # original register is copied into or -1. */ 1150#define RANGE_REG_COPY(INSN,N) XCINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 1, REG) 1151 1152/* How many times a register in a live range note was referenced. */ 1153#define RANGE_REG_REFS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 2) 1154 1155/* How many times a register in a live range note was set. */ 1156#define RANGE_REG_SETS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 3) 1157 1158/* How many times a register in a live range note died. */ 1159#define RANGE_REG_DEATHS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 4) 1160 1161/* Whether the original value is needed to be copied into the range register at 1162 the start of the range. */ 1163#define RANGE_REG_COPY_FLAGS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 5) 1164 1165/* # of insns the register copy is live over. */ 1166#define RANGE_REG_LIVE_LENGTH(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 6) 1167 1168/* # of calls the register copy is live over. */ 1169#define RANGE_REG_N_CALLS(INSN,N) XINT (XCVECEXP (INSN, 2, N, RANGE_INFO), 7) 1170 1171/* DECL_NODE pointer of the declaration if the register is a user defined 1172 variable. */ 1173#define RANGE_REG_SYMBOL_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 8) 1174 1175/* BLOCK_NODE pointer to the block the variable is declared in if the 1176 register is a user defined variable. */ 1177#define RANGE_REG_BLOCK_NODE(INSN,N) XTREE (XCVECEXP (INSN, 2, N, RANGE_INFO), 9) 1178 1179/* EXPR_LIST of the distinct ranges a variable is in. */ 1180#define RANGE_VAR_LIST(INSN) (XEXP (INSN, 0)) 1181 1182/* Block a variable is declared in. */ 1183#define RANGE_VAR_BLOCK(INSN) (XTREE (INSN, 1)) 1184 1185/* # of distinct ranges a variable is in. */ 1186#define RANGE_VAR_NUM(INSN) (XINT (INSN, 2)) 1187 1188/* For a NOTE_INSN_LIVE note, the registers which are currently live. */ 1189#define RANGE_LIVE_BITMAP(INSN) (XBITMAP (INSN, 0)) 1190 1191/* For a NOTE_INSN_LIVE note, the original basic block number. */ 1192#define RANGE_LIVE_ORIG_BLOCK(INSN) (XINT (INSN, 1)) 1193 1194/* Determine if the insn is a PHI node. */ 1195#define PHI_NODE_P(X) \ 1196 ((X) && GET_CODE (X) == INSN \ 1197 && GET_CODE (PATTERN (X)) == SET \ 1198 && GET_CODE (SET_SRC (PATTERN (X))) == PHI) 1199 1200/* Nonzero if we need to distinguish between the return value of this function 1201 and the return value of a function called by this function. This helps 1202 integrate.c. 1203 This is 1 until after the rtl generation pass. */ 1204extern int rtx_equal_function_value_matters; 1205 1206/* Nonzero when we are generating CONCATs. */ 1207extern int generating_concat_p; 1208 1209/* Generally useful functions. */ 1210 1211/* In expmed.c */ 1212extern int ceil_log2 PARAMS ((unsigned HOST_WIDE_INT)); 1213 1214#define plus_constant(X, C) plus_constant_wide ((X), (HOST_WIDE_INT) (C)) 1215 1216/* In builtins.c */ 1217extern rtx expand_builtin_expect_jump PARAMS ((tree, rtx, rtx)); 1218 1219/* In explow.c */ 1220extern void set_stack_check_libfunc PARAMS ((rtx)); 1221extern HOST_WIDE_INT trunc_int_for_mode PARAMS ((HOST_WIDE_INT, 1222 enum machine_mode)); 1223extern rtx plus_constant_wide PARAMS ((rtx, HOST_WIDE_INT)); 1224extern rtx plus_constant_for_output_wide PARAMS ((rtx, HOST_WIDE_INT)); 1225extern void optimize_save_area_alloca PARAMS ((rtx)); 1226 1227/* In emit-rtl.c */ 1228extern rtx gen_rtx PARAMS ((enum rtx_code, 1229 enum machine_mode, ...)); 1230extern rtvec gen_rtvec PARAMS ((int, ...)); 1231extern rtx copy_insn_1 PARAMS ((rtx)); 1232extern rtx copy_insn PARAMS ((rtx)); 1233 1234/* In rtl.c */ 1235extern rtx rtx_alloc PARAMS ((RTX_CODE)); 1236extern rtvec rtvec_alloc PARAMS ((int)); 1237extern rtx copy_rtx PARAMS ((rtx)); 1238 1239/* In emit-rtl.c */ 1240extern rtx copy_rtx_if_shared PARAMS ((rtx)); 1241 1242/* In rtl.c */ 1243extern rtx copy_most_rtx PARAMS ((rtx, rtx)); 1244extern rtx shallow_copy_rtx PARAMS ((rtx)); 1245extern int rtx_equal_p PARAMS ((rtx, rtx)); 1246 1247/* In emit-rtl.c */ 1248extern rtvec gen_rtvec_v PARAMS ((int, rtx *)); 1249extern rtx gen_reg_rtx PARAMS ((enum machine_mode)); 1250extern rtx gen_label_rtx PARAMS ((void)); 1251extern int subreg_hard_regno PARAMS ((rtx, int)); 1252extern rtx gen_lowpart_common PARAMS ((enum machine_mode, rtx)); 1253extern rtx gen_lowpart PARAMS ((enum machine_mode, rtx)); 1254 1255/* In cse.c */ 1256extern rtx gen_lowpart_if_possible PARAMS ((enum machine_mode, rtx)); 1257 1258/* In emit-rtl.c */ 1259extern rtx gen_highpart PARAMS ((enum machine_mode, rtx)); 1260extern rtx gen_highpart_mode PARAMS ((enum machine_mode, 1261 enum machine_mode, rtx)); 1262extern rtx gen_realpart PARAMS ((enum machine_mode, rtx)); 1263extern rtx gen_imagpart PARAMS ((enum machine_mode, rtx)); 1264extern rtx operand_subword PARAMS ((rtx, unsigned int, int, 1265 enum machine_mode)); 1266extern rtx constant_subword PARAMS ((rtx, int, 1267 enum machine_mode)); 1268 1269/* In emit-rtl.c */ 1270extern rtx operand_subword_force PARAMS ((rtx, unsigned int, 1271 enum machine_mode)); 1272extern int subreg_lowpart_p PARAMS ((rtx)); 1273extern unsigned int subreg_lowpart_offset PARAMS ((enum machine_mode, 1274 enum machine_mode)); 1275extern unsigned int subreg_highpart_offset PARAMS ((enum machine_mode, 1276 enum machine_mode)); 1277extern rtx make_safe_from PARAMS ((rtx, rtx)); 1278extern rtx convert_memory_address PARAMS ((enum machine_mode, rtx)); 1279extern rtx get_insns PARAMS ((void)); 1280extern const char *get_insn_name PARAMS ((int)); 1281extern rtx get_last_insn PARAMS ((void)); 1282extern rtx get_last_insn_anywhere PARAMS ((void)); 1283extern void start_sequence PARAMS ((void)); 1284extern void push_to_sequence PARAMS ((rtx)); 1285extern void end_sequence PARAMS ((void)); 1286extern void push_to_full_sequence PARAMS ((rtx, rtx)); 1287extern void end_full_sequence PARAMS ((rtx*, rtx*)); 1288extern rtx gen_sequence PARAMS ((void)); 1289 1290/* In varasm.c */ 1291extern rtx immed_double_const PARAMS ((HOST_WIDE_INT, HOST_WIDE_INT, enum machine_mode)); 1292extern rtx mem_for_const_double PARAMS ((rtx)); 1293extern rtx force_const_mem PARAMS ((enum machine_mode, rtx)); 1294 1295/* In varasm.c */ 1296extern rtx get_pool_constant PARAMS ((rtx)); 1297extern enum machine_mode get_pool_mode PARAMS ((rtx)); 1298extern rtx get_pool_constant_for_function PARAMS ((struct function *, rtx)); 1299extern enum machine_mode get_pool_mode_for_function PARAMS ((struct function *, rtx)); 1300extern int get_pool_offset PARAMS ((rtx)); 1301extern rtx simplify_subtraction PARAMS ((rtx)); 1302 1303/* In function.c */ 1304extern rtx assign_stack_local PARAMS ((enum machine_mode, 1305 HOST_WIDE_INT, int)); 1306extern rtx assign_stack_temp PARAMS ((enum machine_mode, 1307 HOST_WIDE_INT, int)); 1308extern rtx assign_stack_temp_for_type PARAMS ((enum machine_mode, 1309 HOST_WIDE_INT, int, tree)); 1310extern rtx assign_temp PARAMS ((tree, int, int, int)); 1311/* In emit-rtl.c */ 1312extern rtx emit_insn_before PARAMS ((rtx, rtx)); 1313extern rtx emit_jump_insn_before PARAMS ((rtx, rtx)); 1314extern rtx emit_call_insn_before PARAMS ((rtx, rtx)); 1315extern rtx emit_barrier_before PARAMS ((rtx)); 1316extern rtx emit_label_before PARAMS ((rtx, rtx)); 1317extern rtx emit_note_before PARAMS ((int, rtx)); 1318extern rtx emit_insn_after PARAMS ((rtx, rtx)); 1319extern rtx emit_jump_insn_after PARAMS ((rtx, rtx)); 1320extern rtx emit_barrier_after PARAMS ((rtx)); 1321extern rtx emit_label_after PARAMS ((rtx, rtx)); 1322extern rtx emit_note_after PARAMS ((int, rtx)); 1323extern rtx emit_line_note_after PARAMS ((const char *, int, rtx)); 1324extern rtx emit_insn PARAMS ((rtx)); 1325extern rtx emit_insns PARAMS ((rtx)); 1326extern rtx emit_insns_before PARAMS ((rtx, rtx)); 1327extern rtx emit_insns_after PARAMS ((rtx, rtx)); 1328extern rtx emit_jump_insn PARAMS ((rtx)); 1329extern rtx emit_call_insn PARAMS ((rtx)); 1330extern rtx emit_label PARAMS ((rtx)); 1331extern rtx emit_barrier PARAMS ((void)); 1332extern rtx emit_line_note PARAMS ((const char *, int)); 1333extern rtx emit_note PARAMS ((const char *, int)); 1334extern rtx emit_line_note_force PARAMS ((const char *, int)); 1335extern rtx make_insn_raw PARAMS ((rtx)); 1336extern rtx previous_insn PARAMS ((rtx)); 1337extern rtx next_insn PARAMS ((rtx)); 1338extern rtx prev_nonnote_insn PARAMS ((rtx)); 1339extern rtx next_nonnote_insn PARAMS ((rtx)); 1340extern rtx prev_real_insn PARAMS ((rtx)); 1341extern rtx next_real_insn PARAMS ((rtx)); 1342extern rtx prev_active_insn PARAMS ((rtx)); 1343extern rtx next_active_insn PARAMS ((rtx)); 1344extern int active_insn_p PARAMS ((rtx)); 1345extern rtx prev_label PARAMS ((rtx)); 1346extern rtx next_label PARAMS ((rtx)); 1347extern rtx next_cc0_user PARAMS ((rtx)); 1348extern rtx prev_cc0_setter PARAMS ((rtx)); 1349 1350/* In jump.c */ 1351extern rtx next_nondeleted_insn PARAMS ((rtx)); 1352extern enum rtx_code reverse_condition PARAMS ((enum rtx_code)); 1353extern enum rtx_code reverse_condition_maybe_unordered PARAMS ((enum rtx_code)); 1354extern enum rtx_code swap_condition PARAMS ((enum rtx_code)); 1355extern enum rtx_code unsigned_condition PARAMS ((enum rtx_code)); 1356extern enum rtx_code signed_condition PARAMS ((enum rtx_code)); 1357extern void mark_jump_label PARAMS ((rtx, rtx, int)); 1358extern void cleanup_barriers PARAMS ((void)); 1359 1360/* In jump.c */ 1361extern bool squeeze_notes PARAMS ((rtx *, rtx *)); 1362extern rtx delete_related_insns PARAMS ((rtx)); 1363extern void delete_jump PARAMS ((rtx)); 1364extern void delete_barrier PARAMS ((rtx)); 1365extern rtx get_label_before PARAMS ((rtx)); 1366extern rtx get_label_after PARAMS ((rtx)); 1367extern rtx follow_jumps PARAMS ((rtx)); 1368 1369/* In recog.c */ 1370extern rtx *find_constant_term_loc PARAMS ((rtx *)); 1371 1372/* In emit-rtl.c */ 1373extern rtx try_split PARAMS ((rtx, rtx, int)); 1374extern int split_branch_probability; 1375 1376/* In unknown file */ 1377extern rtx split_insns PARAMS ((rtx, rtx)); 1378 1379/* In simplify-rtx.c */ 1380extern rtx simplify_unary_operation PARAMS ((enum rtx_code, 1381 enum machine_mode, rtx, 1382 enum machine_mode)); 1383extern rtx simplify_binary_operation PARAMS ((enum rtx_code, 1384 enum machine_mode, rtx, 1385 rtx)); 1386extern rtx simplify_ternary_operation PARAMS ((enum rtx_code, 1387 enum machine_mode, 1388 enum machine_mode, rtx, rtx, 1389 rtx)); 1390extern rtx simplify_relational_operation PARAMS ((enum rtx_code, 1391 enum machine_mode, rtx, 1392 rtx)); 1393extern rtx simplify_gen_binary PARAMS ((enum rtx_code, 1394 enum machine_mode, 1395 rtx, rtx)); 1396extern rtx simplify_gen_unary PARAMS ((enum rtx_code, 1397 enum machine_mode, rtx, 1398 enum machine_mode)); 1399extern rtx simplify_gen_ternary PARAMS ((enum rtx_code, 1400 enum machine_mode, 1401 enum machine_mode, 1402 rtx, rtx, rtx)); 1403extern rtx simplify_gen_relational PARAMS ((enum rtx_code, 1404 enum machine_mode, 1405 enum machine_mode, 1406 rtx, rtx)); 1407extern rtx simplify_subreg PARAMS ((enum machine_mode, 1408 rtx, 1409 enum machine_mode, 1410 unsigned int)); 1411extern rtx simplify_gen_subreg PARAMS ((enum machine_mode, 1412 rtx, 1413 enum machine_mode, 1414 unsigned int)); 1415extern rtx simplify_replace_rtx PARAMS ((rtx, rtx, rtx)); 1416extern rtx simplify_rtx PARAMS ((rtx)); 1417extern rtx avoid_constant_pool_reference PARAMS ((rtx)); 1418 1419/* In function.c */ 1420extern rtx gen_mem_addressof PARAMS ((rtx, tree)); 1421 1422/* In regclass.c */ 1423extern enum machine_mode choose_hard_reg_mode PARAMS ((unsigned int, 1424 unsigned int)); 1425 1426/* In emit-rtl.c */ 1427extern rtx set_unique_reg_note PARAMS ((rtx, enum reg_note, rtx)); 1428 1429/* Functions in rtlanal.c */ 1430 1431/* Single set is implemented as macro for performance reasons. */ 1432#define single_set(I) (INSN_P (I) \ 1433 ? (GET_CODE (PATTERN (I)) == SET \ 1434 ? PATTERN (I) : single_set_1 (I)) \ 1435 : NULL_RTX) 1436#define single_set_1(I) single_set_2 (I, PATTERN (I)) 1437 1438extern int rtx_addr_can_trap_p PARAMS ((rtx)); 1439extern int rtx_unstable_p PARAMS ((rtx)); 1440extern int rtx_varies_p PARAMS ((rtx, int)); 1441extern int rtx_addr_varies_p PARAMS ((rtx, int)); 1442extern HOST_WIDE_INT get_integer_term PARAMS ((rtx)); 1443extern rtx get_related_value PARAMS ((rtx)); 1444extern rtx get_jump_table_offset PARAMS ((rtx, rtx *)); 1445extern int reg_mentioned_p PARAMS ((rtx, rtx)); 1446extern int count_occurrences PARAMS ((rtx, rtx, int)); 1447extern int reg_referenced_p PARAMS ((rtx, rtx)); 1448extern int reg_used_between_p PARAMS ((rtx, rtx, rtx)); 1449extern int reg_referenced_between_p PARAMS ((rtx, rtx, rtx)); 1450extern int reg_set_between_p PARAMS ((rtx, rtx, rtx)); 1451extern int regs_set_between_p PARAMS ((rtx, rtx, rtx)); 1452extern int commutative_operand_precedence PARAMS ((rtx)); 1453extern int swap_commutative_operands_p PARAMS ((rtx, rtx)); 1454extern int modified_between_p PARAMS ((rtx, rtx, rtx)); 1455extern int no_labels_between_p PARAMS ((rtx, rtx)); 1456extern int no_jumps_between_p PARAMS ((rtx, rtx)); 1457extern int modified_in_p PARAMS ((rtx, rtx)); 1458extern int insn_dependent_p PARAMS ((rtx, rtx)); 1459extern int reg_set_p PARAMS ((rtx, rtx)); 1460extern rtx single_set_2 PARAMS ((rtx, rtx)); 1461extern int multiple_sets PARAMS ((rtx)); 1462extern int set_noop_p PARAMS ((rtx)); 1463extern int noop_move_p PARAMS ((rtx)); 1464extern rtx find_last_value PARAMS ((rtx, rtx *, rtx, int)); 1465extern int refers_to_regno_p PARAMS ((unsigned int, unsigned int, 1466 rtx, rtx *)); 1467extern int reg_overlap_mentioned_p PARAMS ((rtx, rtx)); 1468extern rtx set_of PARAMS ((rtx, rtx)); 1469extern void note_stores PARAMS ((rtx, 1470 void (*) (rtx, rtx, void *), 1471 void *)); 1472extern void note_uses PARAMS ((rtx *, 1473 void (*) (rtx *, void *), 1474 void *)); 1475extern rtx reg_set_last PARAMS ((rtx, rtx)); 1476extern int dead_or_set_p PARAMS ((rtx, rtx)); 1477extern int dead_or_set_regno_p PARAMS ((rtx, unsigned int)); 1478extern rtx find_reg_note PARAMS ((rtx, enum reg_note, rtx)); 1479extern rtx find_regno_note PARAMS ((rtx, enum reg_note, 1480 unsigned int)); 1481extern rtx find_reg_equal_equiv_note PARAMS ((rtx)); 1482extern int find_reg_fusage PARAMS ((rtx, enum rtx_code, rtx)); 1483extern int find_regno_fusage PARAMS ((rtx, enum rtx_code, 1484 unsigned int)); 1485extern void remove_note PARAMS ((rtx, rtx)); 1486extern int side_effects_p PARAMS ((rtx)); 1487extern int volatile_refs_p PARAMS ((rtx)); 1488extern int volatile_insn_p PARAMS ((rtx)); 1489extern int may_trap_p PARAMS ((rtx)); 1490extern int inequality_comparisons_p PARAMS ((rtx)); 1491extern rtx replace_rtx PARAMS ((rtx, rtx, rtx)); 1492extern rtx replace_regs PARAMS ((rtx, rtx *, unsigned int, 1493 int)); 1494extern int computed_jump_p PARAMS ((rtx)); 1495typedef int (*rtx_function) PARAMS ((rtx *, void *)); 1496extern int for_each_rtx PARAMS ((rtx *, rtx_function, void *)); 1497extern rtx regno_use_in PARAMS ((unsigned int, rtx)); 1498extern int auto_inc_p PARAMS ((rtx)); 1499extern int in_expr_list_p PARAMS ((rtx, rtx)); 1500extern void remove_node_from_expr_list PARAMS ((rtx, rtx *)); 1501extern int insns_safe_to_move_p PARAMS ((rtx, rtx, rtx *)); 1502extern int loc_mentioned_in_p PARAMS ((rtx *, rtx)); 1503extern rtx find_first_parameter_load PARAMS ((rtx, rtx)); 1504 1505/* flow.c */ 1506 1507extern rtx find_use_as_address PARAMS ((rtx, rtx, HOST_WIDE_INT)); 1508void init_EXPR_INSN_LIST_cache PARAMS ((void)); 1509void free_EXPR_LIST_list PARAMS ((rtx *)); 1510void free_INSN_LIST_list PARAMS ((rtx *)); 1511void free_EXPR_LIST_node PARAMS ((rtx)); 1512void free_INSN_LIST_node PARAMS ((rtx)); 1513rtx alloc_INSN_LIST PARAMS ((rtx, rtx)); 1514rtx alloc_EXPR_LIST PARAMS ((int, rtx, rtx)); 1515 1516/* regclass.c */ 1517 1518/* Maximum number of parallel sets and clobbers in any insn in this fn. 1519 Always at least 3, since the combiner could put that many togetherm 1520 and we want this to remain correct for all the remaining passes. */ 1521 1522extern int max_parallel; 1523 1524/* Free up register info memory. */ 1525extern void free_reg_info PARAMS ((void)); 1526 1527/* recog.c */ 1528extern int asm_noperands PARAMS ((rtx)); 1529extern const char *decode_asm_operands PARAMS ((rtx, rtx *, rtx **, 1530 const char **, 1531 enum machine_mode *)); 1532 1533extern enum reg_class reg_preferred_class PARAMS ((int)); 1534extern enum reg_class reg_alternate_class PARAMS ((int)); 1535 1536extern rtx get_first_nonparm_insn PARAMS ((void)); 1537 1538extern void split_all_insns PARAMS ((int)); 1539extern void split_all_insns_noflow PARAMS ((void)); 1540 1541#define MAX_SAVED_CONST_INT 64 1542extern rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1]; 1543 1544#define const0_rtx (const_int_rtx[MAX_SAVED_CONST_INT]) 1545#define const1_rtx (const_int_rtx[MAX_SAVED_CONST_INT+1]) 1546#define const2_rtx (const_int_rtx[MAX_SAVED_CONST_INT+2]) 1547#define constm1_rtx (const_int_rtx[MAX_SAVED_CONST_INT-1]) 1548extern rtx const_true_rtx; 1549 1550extern rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE]; 1551 1552/* Returns a constant 0 rtx in mode MODE. Integer modes are treated the 1553 same as VOIDmode. */ 1554 1555#define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)]) 1556 1557/* Likewise, for the constants 1 and 2. */ 1558 1559#define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)]) 1560#define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)]) 1561 1562/* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg 1563 is used to represent the frame pointer. This is because the 1564 hard frame pointer and the automatic variables are separated by an amount 1565 that cannot be determined until after register allocation. We can assume 1566 that in this case ELIMINABLE_REGS will be defined, one action of which 1567 will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM. */ 1568#ifndef HARD_FRAME_POINTER_REGNUM 1569#define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM 1570#endif 1571 1572/* Index labels for global_rtl. */ 1573enum global_rtl_index 1574{ 1575 GR_PC, 1576 GR_CC0, 1577 GR_STACK_POINTER, 1578 GR_FRAME_POINTER, 1579/* For register elimination to work properly these hard_frame_pointer_rtx, 1580 frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to 1581 the same register. */ 1582#if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1583 GR_ARG_POINTER = GR_FRAME_POINTER, 1584#endif 1585#if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM 1586 GR_HARD_FRAME_POINTER = GR_FRAME_POINTER, 1587#else 1588 GR_HARD_FRAME_POINTER, 1589#endif 1590#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM 1591#if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM 1592 GR_ARG_POINTER = GR_HARD_FRAME_POINTER, 1593#else 1594 GR_ARG_POINTER, 1595#endif 1596#endif 1597 GR_VIRTUAL_INCOMING_ARGS, 1598 GR_VIRTUAL_STACK_ARGS, 1599 GR_VIRTUAL_STACK_DYNAMIC, 1600 GR_VIRTUAL_OUTGOING_ARGS, 1601 GR_VIRTUAL_CFA, 1602 1603 GR_MAX 1604}; 1605 1606/* Pointers to standard pieces of rtx are stored here. */ 1607extern rtx global_rtl[GR_MAX]; 1608 1609/* Standard pieces of rtx, to be substituted directly into things. */ 1610#define pc_rtx (global_rtl[GR_PC]) 1611#define cc0_rtx (global_rtl[GR_CC0]) 1612 1613/* All references to certain hard regs, except those created 1614 by allocating pseudo regs into them (when that's possible), 1615 go through these unique rtx objects. */ 1616#define stack_pointer_rtx (global_rtl[GR_STACK_POINTER]) 1617#define frame_pointer_rtx (global_rtl[GR_FRAME_POINTER]) 1618#define hard_frame_pointer_rtx (global_rtl[GR_HARD_FRAME_POINTER]) 1619#define arg_pointer_rtx (global_rtl[GR_ARG_POINTER]) 1620 1621extern rtx pic_offset_table_rtx; 1622extern rtx struct_value_rtx; 1623extern rtx struct_value_incoming_rtx; 1624extern rtx static_chain_rtx; 1625extern rtx static_chain_incoming_rtx; 1626extern rtx return_address_pointer_rtx; 1627 1628/* Include the RTL generation functions. */ 1629 1630#ifndef NO_GENRTL_H 1631#include "genrtl.h" 1632#endif 1633 1634/* There are some RTL codes that require special attention; the 1635 generation functions included above do the raw handling. If you 1636 add to this list, modify special_rtx in gengenrtl.c as well. You 1637 should also modify gen_rtx to use the special function. */ 1638 1639extern rtx gen_rtx_CONST_DOUBLE PARAMS ((enum machine_mode, 1640 HOST_WIDE_INT, HOST_WIDE_INT)); 1641extern rtx gen_rtx_CONST_INT PARAMS ((enum machine_mode, HOST_WIDE_INT)); 1642extern rtx gen_raw_REG PARAMS ((enum machine_mode, int)); 1643extern rtx gen_rtx_REG PARAMS ((enum machine_mode, int)); 1644extern rtx gen_rtx_SUBREG PARAMS ((enum machine_mode, rtx, int)); 1645extern rtx gen_rtx_MEM PARAMS ((enum machine_mode, rtx)); 1646 1647extern rtx gen_lowpart_SUBREG PARAMS ((enum machine_mode, rtx)); 1648 1649/* We need the cast here to ensure that we get the same result both with 1650 and without prototypes. */ 1651#define GEN_INT(N) gen_rtx_CONST_INT (VOIDmode, (HOST_WIDE_INT) (N)) 1652 1653/* Virtual registers are used during RTL generation to refer to locations into 1654 the stack frame when the actual location isn't known until RTL generation 1655 is complete. The routine instantiate_virtual_regs replaces these with 1656 the proper value, which is normally {frame,arg,stack}_pointer_rtx plus 1657 a constant. */ 1658 1659#define FIRST_VIRTUAL_REGISTER (FIRST_PSEUDO_REGISTER) 1660 1661/* This points to the first word of the incoming arguments passed on the stack, 1662 either by the caller or by the callee when pretending it was passed by the 1663 caller. */ 1664 1665#define virtual_incoming_args_rtx (global_rtl[GR_VIRTUAL_INCOMING_ARGS]) 1666 1667#define VIRTUAL_INCOMING_ARGS_REGNUM (FIRST_VIRTUAL_REGISTER) 1668 1669/* If FRAME_GROWS_DOWNWARD, this points to immediately above the first 1670 variable on the stack. Otherwise, it points to the first variable on 1671 the stack. */ 1672 1673#define virtual_stack_vars_rtx (global_rtl[GR_VIRTUAL_STACK_ARGS]) 1674 1675#define VIRTUAL_STACK_VARS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 1) 1676 1677/* This points to the location of dynamically-allocated memory on the stack 1678 immediately after the stack pointer has been adjusted by the amount 1679 desired. */ 1680 1681#define virtual_stack_dynamic_rtx (global_rtl[GR_VIRTUAL_STACK_DYNAMIC]) 1682 1683#define VIRTUAL_STACK_DYNAMIC_REGNUM ((FIRST_VIRTUAL_REGISTER) + 2) 1684 1685/* This points to the location in the stack at which outgoing arguments should 1686 be written when the stack is pre-pushed (arguments pushed using push 1687 insns always use sp). */ 1688 1689#define virtual_outgoing_args_rtx (global_rtl[GR_VIRTUAL_OUTGOING_ARGS]) 1690 1691#define VIRTUAL_OUTGOING_ARGS_REGNUM ((FIRST_VIRTUAL_REGISTER) + 3) 1692 1693/* This points to the Canonical Frame Address of the function. This 1694 should corrospond to the CFA produced by INCOMING_FRAME_SP_OFFSET, 1695 but is calculated relative to the arg pointer for simplicity; the 1696 frame pointer nor stack pointer are necessarily fixed relative to 1697 the CFA until after reload. */ 1698 1699#define virtual_cfa_rtx (global_rtl[GR_VIRTUAL_CFA]) 1700 1701#define VIRTUAL_CFA_REGNUM ((FIRST_VIRTUAL_REGISTER) + 4) 1702 1703#define LAST_VIRTUAL_REGISTER ((FIRST_VIRTUAL_REGISTER) + 4) 1704 1705/* Nonzero if REGNUM is a pointer into the stack frame. */ 1706#define REGNO_PTR_FRAME_P(REGNUM) \ 1707 ((REGNUM) == STACK_POINTER_REGNUM \ 1708 || (REGNUM) == FRAME_POINTER_REGNUM \ 1709 || (REGNUM) == HARD_FRAME_POINTER_REGNUM \ 1710 || (REGNUM) == ARG_POINTER_REGNUM \ 1711 || ((REGNUM) >= FIRST_VIRTUAL_REGISTER \ 1712 && (REGNUM) <= LAST_VIRTUAL_REGISTER)) 1713 1714/* REGNUM never really appearing in the INSN stream. */ 1715#define INVALID_REGNUM (~(unsigned int) 0) 1716 1717extern rtx find_next_ref PARAMS ((rtx, rtx)); 1718 1719extern rtx output_constant_def PARAMS ((tree, int)); 1720extern rtx immed_real_const PARAMS ((tree)); 1721 1722/* Define a default value for STORE_FLAG_VALUE. */ 1723 1724#ifndef STORE_FLAG_VALUE 1725#define STORE_FLAG_VALUE 1 1726#endif 1727 1728/* Nonzero after the second flow pass has completed. 1729 Set to 1 or 0 by toplev.c */ 1730extern int flow2_completed; 1731 1732/* Nonzero after end of reload pass. 1733 Set to 1 or 0 by reload1.c. */ 1734 1735extern int reload_completed; 1736 1737/* Set to 1 while reload_as_needed is operating. 1738 Required by some machines to handle any generated moves differently. */ 1739 1740extern int reload_in_progress; 1741 1742/* If this is nonzero, we do not bother generating VOLATILE 1743 around volatile memory references, and we are willing to 1744 output indirect addresses. If cse is to follow, we reject 1745 indirect addresses so a useful potential cse is generated; 1746 if it is used only once, instruction combination will produce 1747 the same indirect address eventually. */ 1748extern int cse_not_expected; 1749 1750/* Set to nonzero before life analysis to indicate that it is unsafe to 1751 generate any new pseudo registers. */ 1752extern int no_new_pseudos; 1753 1754/* Translates rtx code to tree code, for those codes needed by 1755 REAL_ARITHMETIC. The function returns an int because the caller may not 1756 know what `enum tree_code' means. */ 1757 1758extern int rtx_to_tree_code PARAMS ((enum rtx_code)); 1759 1760/* In tree.c */ 1761struct obstack; 1762extern void gcc_obstack_init PARAMS ((struct obstack *)); 1763 1764/* In cse.c */ 1765struct cse_basic_block_data; 1766 1767/* Return the right cost to give to an operation 1768 to make the cost of the corresponding register-to-register instruction 1769 N times that of a fast register-to-register instruction. */ 1770#define COSTS_N_INSNS(N) ((N) * 4) 1771 1772/* Maximum cost of a rtl expression. This value has the special meaning 1773 not to use an rtx with this cost under any circumstances. */ 1774#define MAX_COST INT_MAX 1775 1776extern int rtx_cost PARAMS ((rtx, enum rtx_code)); 1777extern int address_cost PARAMS ((rtx, enum machine_mode)); 1778extern void delete_trivially_dead_insns PARAMS ((rtx, int, int)); 1779#ifdef BUFSIZ 1780extern int cse_main PARAMS ((rtx, int, int, FILE *)); 1781#endif 1782extern void cse_end_of_basic_block PARAMS ((rtx, 1783 struct cse_basic_block_data *, 1784 int, int, int)); 1785 1786/* In jump.c */ 1787extern int comparison_dominates_p PARAMS ((enum rtx_code, enum rtx_code)); 1788extern int condjump_p PARAMS ((rtx)); 1789extern int any_condjump_p PARAMS ((rtx)); 1790extern int any_uncondjump_p PARAMS ((rtx)); 1791extern int safe_to_remove_jump_p PARAMS ((rtx)); 1792extern rtx pc_set PARAMS ((rtx)); 1793extern rtx condjump_label PARAMS ((rtx)); 1794extern int simplejump_p PARAMS ((rtx)); 1795extern int returnjump_p PARAMS ((rtx)); 1796extern int onlyjump_p PARAMS ((rtx)); 1797extern int only_sets_cc0_p PARAMS ((rtx)); 1798extern int sets_cc0_p PARAMS ((rtx)); 1799extern int invert_jump_1 PARAMS ((rtx, rtx)); 1800extern int invert_jump PARAMS ((rtx, rtx, int)); 1801extern int rtx_renumbered_equal_p PARAMS ((rtx, rtx)); 1802extern int true_regnum PARAMS ((rtx)); 1803extern int redirect_jump_1 PARAMS ((rtx, rtx)); 1804extern int redirect_jump PARAMS ((rtx, rtx, int)); 1805extern void rebuild_jump_labels PARAMS ((rtx)); 1806extern enum rtx_code reversed_comparison_code PARAMS ((rtx, rtx)); 1807extern enum rtx_code reversed_comparison_code_parts PARAMS ((enum rtx_code, 1808 rtx, rtx, rtx)); 1809extern void delete_for_peephole PARAMS ((rtx, rtx)); 1810extern int condjump_in_parallel_p PARAMS ((rtx)); 1811extern void never_reached_warning PARAMS ((rtx)); 1812extern void purge_line_number_notes PARAMS ((rtx)); 1813extern void copy_loop_headers PARAMS ((rtx)); 1814 1815/* In emit-rtl.c. */ 1816extern int max_reg_num PARAMS ((void)); 1817extern int max_label_num PARAMS ((void)); 1818extern int get_first_label_num PARAMS ((void)); 1819extern void delete_insns_since PARAMS ((rtx)); 1820extern void mark_reg_pointer PARAMS ((rtx, int)); 1821extern void mark_user_reg PARAMS ((rtx)); 1822extern void reset_used_flags PARAMS ((rtx)); 1823extern void reorder_insns PARAMS ((rtx, rtx, rtx)); 1824extern void reorder_insns_nobb PARAMS ((rtx, rtx, rtx)); 1825extern int get_max_uid PARAMS ((void)); 1826extern int in_sequence_p PARAMS ((void)); 1827extern void force_next_line_note PARAMS ((void)); 1828extern void clear_emit_caches PARAMS ((void)); 1829extern void init_emit PARAMS ((void)); 1830extern void init_emit_once PARAMS ((int)); 1831extern void push_topmost_sequence PARAMS ((void)); 1832extern void pop_topmost_sequence PARAMS ((void)); 1833extern int subreg_realpart_p PARAMS ((rtx)); 1834extern void reverse_comparison PARAMS ((rtx)); 1835extern void set_new_first_and_last_insn PARAMS ((rtx, rtx)); 1836extern void set_new_first_and_last_label_num PARAMS ((int, int)); 1837extern void set_new_last_label_num PARAMS ((int)); 1838extern void unshare_all_rtl_again PARAMS ((rtx)); 1839extern void set_last_insn PARAMS ((rtx)); 1840extern void link_cc0_insns PARAMS ((rtx)); 1841extern void add_insn PARAMS ((rtx)); 1842extern void add_insn_before PARAMS ((rtx, rtx)); 1843extern void add_insn_after PARAMS ((rtx, rtx)); 1844extern void remove_insn PARAMS ((rtx)); 1845extern void reorder_insns_with_line_notes PARAMS ((rtx, rtx, rtx)); 1846extern void emit_insn_after_with_line_notes PARAMS ((rtx, rtx, rtx)); 1847extern enum rtx_code classify_insn PARAMS ((rtx)); 1848extern rtx emit PARAMS ((rtx)); 1849/* Query and clear/ restore no_line_numbers. This is used by the 1850 switch / case handling in stmt.c to give proper line numbers in 1851 warnings about unreachable code. */ 1852int force_line_numbers PARAMS ((void)); 1853void restore_line_number_status PARAMS ((int old_value)); 1854extern void renumber_insns PARAMS ((FILE *)); 1855extern void remove_unnecessary_notes PARAMS ((void)); 1856extern rtx delete_insn PARAMS ((rtx)); 1857extern void delete_insn_chain PARAMS ((rtx, rtx)); 1858 1859/* In combine.c */ 1860extern int combine_instructions PARAMS ((rtx, unsigned int)); 1861extern unsigned int extended_count PARAMS ((rtx, enum machine_mode, int)); 1862extern rtx remove_death PARAMS ((unsigned int, rtx)); 1863#ifdef BUFSIZ 1864extern void dump_combine_stats PARAMS ((FILE *)); 1865extern void dump_combine_total_stats PARAMS ((FILE *)); 1866#endif 1867 1868/* In sched.c. */ 1869#ifdef BUFSIZ 1870extern void schedule_insns PARAMS ((FILE *)); 1871extern void schedule_ebbs PARAMS ((FILE *)); 1872#endif 1873extern void fix_sched_param PARAMS ((const char *, const char *)); 1874 1875/* In print-rtl.c */ 1876extern const char *print_rtx_head; 1877extern void debug_rtx PARAMS ((rtx)); 1878extern void debug_rtx_list PARAMS ((rtx, int)); 1879extern void debug_rtx_range PARAMS ((rtx, rtx)); 1880extern rtx debug_rtx_find PARAMS ((rtx, int)); 1881#ifdef BUFSIZ 1882extern void print_mem_expr PARAMS ((FILE *, tree)); 1883extern void print_rtl PARAMS ((FILE *, rtx)); 1884extern void print_simple_rtl PARAMS ((FILE *, rtx)); 1885extern int print_rtl_single PARAMS ((FILE *, rtx)); 1886extern void print_inline_rtx PARAMS ((FILE *, rtx, int)); 1887#endif 1888 1889/* In loop.c */ 1890extern void init_loop PARAMS ((void)); 1891extern rtx libcall_other_reg PARAMS ((rtx, rtx)); 1892#ifdef BUFSIZ 1893extern void loop_optimize PARAMS ((rtx, FILE *, int)); 1894#endif 1895extern void record_excess_regs PARAMS ((rtx, rtx, rtx *)); 1896 1897/* In function.c */ 1898extern void reposition_prologue_and_epilogue_notes PARAMS ((rtx)); 1899extern void thread_prologue_and_epilogue_insns PARAMS ((rtx)); 1900extern int prologue_epilogue_contains PARAMS ((rtx)); 1901extern int sibcall_epilogue_contains PARAMS ((rtx)); 1902extern void preserve_rtl_expr_result PARAMS ((rtx)); 1903extern void mark_temp_addr_taken PARAMS ((rtx)); 1904extern void update_temp_slot_address PARAMS ((rtx, rtx)); 1905extern void purge_addressof PARAMS ((rtx)); 1906extern void purge_hard_subreg_sets PARAMS ((rtx)); 1907 1908/* In stmt.c */ 1909extern void set_file_and_line_for_stmt PARAMS ((const char *, int)); 1910extern void expand_null_return PARAMS ((void)); 1911extern void emit_jump PARAMS ((rtx)); 1912extern int preserve_subexpressions_p PARAMS ((void)); 1913 1914/* In expr.c */ 1915extern void move_by_pieces PARAMS ((rtx, rtx, 1916 unsigned HOST_WIDE_INT, 1917 unsigned int)); 1918 1919/* In flow.c */ 1920extern void recompute_reg_usage PARAMS ((rtx, int)); 1921extern int initialize_uninitialized_subregs PARAMS ((void)); 1922#ifdef BUFSIZ 1923extern void print_rtl_with_bb PARAMS ((FILE *, rtx)); 1924extern void dump_flow_info PARAMS ((FILE *)); 1925#endif 1926 1927/* In expmed.c */ 1928extern void init_expmed PARAMS ((void)); 1929extern void expand_inc PARAMS ((rtx, rtx)); 1930extern void expand_dec PARAMS ((rtx, rtx)); 1931extern rtx expand_mult_highpart PARAMS ((enum machine_mode, rtx, 1932 unsigned HOST_WIDE_INT, rtx, 1933 int, int)); 1934 1935/* In gcse.c */ 1936#ifdef BUFSIZ 1937extern int gcse_main PARAMS ((rtx, FILE *)); 1938#endif 1939 1940/* In global.c */ 1941extern void mark_elimination PARAMS ((int, int)); 1942#ifdef BUFSIZ 1943extern int global_alloc PARAMS ((FILE *)); 1944extern void dump_global_regs PARAMS ((FILE *)); 1945#endif 1946#ifdef HARD_CONST 1947extern void retry_global_alloc PARAMS ((int, HARD_REG_SET)); 1948#endif 1949extern void build_insn_chain PARAMS ((rtx)); 1950 1951/* In regclass.c */ 1952extern int reg_classes_intersect_p PARAMS ((enum reg_class, enum reg_class)); 1953extern int reg_class_subset_p PARAMS ((enum reg_class, enum reg_class)); 1954extern void globalize_reg PARAMS ((int)); 1955extern void init_regs PARAMS ((void)); 1956extern void init_reg_sets PARAMS ((void)); 1957extern void regset_release_memory PARAMS ((void)); 1958extern void regclass_init PARAMS ((void)); 1959extern void regclass PARAMS ((rtx, int, FILE *)); 1960extern void reg_scan PARAMS ((rtx, unsigned int, int)); 1961extern void reg_scan_update PARAMS ((rtx, rtx, unsigned int)); 1962extern void fix_register PARAMS ((const char *, int, int)); 1963 1964extern void delete_null_pointer_checks PARAMS ((rtx)); 1965 1966/* In regmove.c */ 1967#ifdef BUFSIZ 1968extern void regmove_optimize PARAMS ((rtx, int, FILE *)); 1969#endif 1970extern void combine_stack_adjustments PARAMS ((void)); 1971 1972/* In reorg.c */ 1973#ifdef BUFSIZ 1974extern void dbr_schedule PARAMS ((rtx, FILE *)); 1975#endif 1976 1977/* In local-alloc.c */ 1978#ifdef BUFSIZ 1979extern void dump_local_alloc PARAMS ((FILE *)); 1980#endif 1981extern int local_alloc PARAMS ((void)); 1982extern int function_invariant_p PARAMS ((rtx)); 1983 1984/* In profile.c */ 1985extern void init_branch_prob PARAMS ((const char *)); 1986extern void branch_prob PARAMS ((void)); 1987extern void end_branch_prob PARAMS ((void)); 1988extern void output_func_start_profiler PARAMS ((void)); 1989 1990/* In reg-stack.c */ 1991#ifdef BUFSIZ 1992extern void reg_to_stack PARAMS ((rtx, FILE *)); 1993#endif 1994 1995/* In fold-const.c */ 1996extern int add_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 1997 unsigned HOST_WIDE_INT, HOST_WIDE_INT, 1998 unsigned HOST_WIDE_INT *, 1999 HOST_WIDE_INT *)); 2000extern int neg_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2001 unsigned HOST_WIDE_INT *, 2002 HOST_WIDE_INT *)); 2003extern int mul_double PARAMS ((unsigned HOST_WIDE_INT, 2004 HOST_WIDE_INT, 2005 unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2006 unsigned HOST_WIDE_INT *, 2007 HOST_WIDE_INT *)); 2008extern void lshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2009 HOST_WIDE_INT, unsigned int, 2010 unsigned HOST_WIDE_INT *, 2011 HOST_WIDE_INT *, int)); 2012extern void rshift_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2013 HOST_WIDE_INT, unsigned int, 2014 unsigned HOST_WIDE_INT *, 2015 HOST_WIDE_INT *, int)); 2016extern void lrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2017 HOST_WIDE_INT, unsigned int, 2018 unsigned HOST_WIDE_INT *, 2019 HOST_WIDE_INT *)); 2020extern void rrotate_double PARAMS ((unsigned HOST_WIDE_INT, HOST_WIDE_INT, 2021 HOST_WIDE_INT, unsigned int, 2022 unsigned HOST_WIDE_INT *, 2023 HOST_WIDE_INT *)); 2024 2025/* In calls.c */ 2026enum libcall_type 2027{ 2028 LCT_NORMAL = 0, 2029 LCT_CONST = 1, 2030 LCT_PURE = 2, 2031 LCT_CONST_MAKE_BLOCK = 3, 2032 LCT_PURE_MAKE_BLOCK = 4, 2033 LCT_NORETURN = 5, 2034 LCT_THROW = 6, 2035 LCT_ALWAYS_RETURN = 7, 2036 LCT_RETURNS_TWICE = 8 2037}; 2038 2039extern void emit_library_call PARAMS ((rtx, enum libcall_type, 2040 enum machine_mode, int, 2041 ...)); 2042extern rtx emit_library_call_value PARAMS ((rtx, rtx, enum libcall_type, 2043 enum machine_mode, int, 2044 ...)); 2045 2046/* In unroll.c */ 2047extern int set_dominates_use PARAMS ((int, int, int, rtx, rtx)); 2048 2049/* In varasm.c */ 2050extern int in_data_section PARAMS ((void)); 2051extern void init_varasm_once PARAMS ((void)); 2052 2053/* In rtl.c */ 2054extern void init_rtl PARAMS ((void)); 2055extern void traverse_md_constants PARAMS ((int (*) (void **, void *), 2056 void *)); 2057struct md_constant { char *name, *value; }; 2058 2059#ifdef BUFSIZ 2060extern int read_skip_spaces PARAMS ((FILE *)); 2061extern rtx read_rtx PARAMS ((FILE *)); 2062#endif 2063 2064extern const char *read_rtx_filename; 2065extern int read_rtx_lineno; 2066 2067/* Redefine abort to report an internal error w/o coredump, and 2068 reporting the location of the error in the source file. This logic 2069 is duplicated in rtl.h and tree.h because every file that needs the 2070 special abort includes one or both. toplev.h gets too few files, 2071 system.h gets too many. */ 2072 2073extern void fancy_abort PARAMS ((const char *, int, const char *)) 2074 ATTRIBUTE_NORETURN; 2075#define abort() fancy_abort (__FILE__, __LINE__, __FUNCTION__) 2076 2077/* In alias.c */ 2078extern void clear_reg_alias_info PARAMS ((rtx)); 2079extern rtx canon_rtx PARAMS ((rtx)); 2080extern int true_dependence PARAMS ((rtx, enum machine_mode, rtx, 2081 int (*)(rtx, int))); 2082extern rtx get_addr PARAMS ((rtx)); 2083extern int canon_true_dependence PARAMS ((rtx, enum machine_mode, rtx, 2084 rtx, int (*)(rtx, int))); 2085extern int read_dependence PARAMS ((rtx, rtx)); 2086extern int anti_dependence PARAMS ((rtx, rtx)); 2087extern int output_dependence PARAMS ((rtx, rtx)); 2088extern void mark_constant_function PARAMS ((void)); 2089extern void init_alias_once PARAMS ((void)); 2090extern void init_alias_analysis PARAMS ((void)); 2091extern void end_alias_analysis PARAMS ((void)); 2092extern rtx addr_side_effect_eval PARAMS ((rtx, int, int)); 2093 2094/* In sibcall.c */ 2095typedef enum { 2096 sibcall_use_normal = 1, 2097 sibcall_use_tail_recursion, 2098 sibcall_use_sibcall 2099} sibcall_use_t; 2100 2101extern void optimize_sibling_and_tail_recursive_calls PARAMS ((void)); 2102extern void replace_call_placeholder PARAMS ((rtx, sibcall_use_t)); 2103 2104#ifdef STACK_REGS 2105extern int stack_regs_mentioned PARAMS ((rtx insn)); 2106#endif 2107 2108/* In toplev.c */ 2109extern rtx stack_limit_rtx; 2110 2111/* In regrename.c */ 2112extern void regrename_optimize PARAMS ((void)); 2113extern void copyprop_hardreg_forward PARAMS ((void)); 2114 2115/* In ifcvt.c */ 2116extern void if_convert PARAMS ((int)); 2117 2118/* In predict.c */ 2119extern void invert_br_probabilities PARAMS ((rtx)); 2120extern bool expensive_function_p PARAMS ((int)); 2121#endif /* ! GCC_RTL_H */ 2122