release/src-rt-6.x.4708/toolchains/hndtools-arm-linux-2.6.36-uclibc-4.5.3/lib/gcc/arm-brcm-linux-uclibcgnueabi/4.5.3/plugin/include/rtl.h

   1 /* Register Transfer Language (RTL) definitions for GCC
   2    Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_RTL_H
  23 #define GCC_RTL_H
  24
  25 #include "statistics.h"
  26 #include "machmode.h"
  27 #include "input.h"
  28 #include "real.h"
  29 #include "vec.h"
  30 #include "fixed-value.h"
  31 #include "alias.h"
  32
  33 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
  34 #undef FLOAT /* Likewise.  */
  35 #undef ABS /* Likewise.  */
  36 #undef PC /* Likewise.  */
  37
  38 /* Value used by some passes to "recognize" noop moves as valid
  39  instructions.  */
  40 #define NOOP_MOVE_INSN_CODE     INT_MAX
  41
  42 /* Register Transfer Language EXPRESSIONS CODES */
  43
  44 #define RTX_CODE        enum rtx_code
  45 enum rtx_code  {
  46
  47 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   ENUM ,
  48 #include "rtl.def"              /* rtl expressions are documented here */
  49 #undef DEF_RTL_EXPR
  50
  51   LAST_AND_UNUSED_RTX_CODE};    /* A convenient way to get a value for
  52                                    NUM_RTX_CODE.
  53                                    Assumes default enum value assignment.  */
  54
  55 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
  56                                 /* The cast here, saves many elsewhere.  */
  57
  58 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
  59
  60 enum rtx_class  {
  61   /* We check bit 0-1 of some rtx class codes in the predicates below.  */
  62
  63   /* Bit 0 = comparison if 0, arithmetic is 1
  64      Bit 1 = 1 if commutative.  */
  65   RTX_COMPARE,          /* 0 */
  66   RTX_COMM_COMPARE,
  67   RTX_BIN_ARITH,
  68   RTX_COMM_ARITH,
  69
  70   /* Must follow the four preceding values.  */
  71   RTX_UNARY,            /* 4 */
  72
  73   RTX_EXTRA,
  74   RTX_MATCH,
  75   RTX_INSN,
  76
  77   /* Bit 0 = 1 if constant.  */
  78   RTX_OBJ,              /* 8 */
  79   RTX_CONST_OBJ,
  80
  81   RTX_TERNARY,
  82   RTX_BITFIELD_OPS,
  83   RTX_AUTOINC
  84 };
  85
  86 #define RTX_OBJ_MASK (~1)
  87 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
  88 #define RTX_COMPARE_MASK (~1)
  89 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
  90 #define RTX_ARITHMETIC_MASK (~1)
  91 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
  92 #define RTX_BINARY_MASK (~3)
  93 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
  94 #define RTX_COMMUTATIVE_MASK (~2)
  95 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
  96 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
  97
  98 extern const unsigned char rtx_length[NUM_RTX_CODE];
  99 #define GET_RTX_LENGTH(CODE)            (rtx_length[(int) (CODE)])
 100
 101 extern const char * const rtx_name[NUM_RTX_CODE];
 102 #define GET_RTX_NAME(CODE)              (rtx_name[(int) (CODE)])
 103
 104 extern const char * const rtx_format[NUM_RTX_CODE];
 105 #define GET_RTX_FORMAT(CODE)            (rtx_format[(int) (CODE)])
 106
 107 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
 108 #define GET_RTX_CLASS(CODE)             (rtx_class[(int) (CODE)])
 109
 110 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
 111 extern const unsigned char rtx_next[NUM_RTX_CODE];
 112 \f
 113 /* The flags and bitfields of an ADDR_DIFF_VEC.  BASE is the base label
 114    relative to which the offsets are calculated, as explained in rtl.def.  */
 115 typedef struct
 116 {
 117   /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
 118   unsigned min_align: 8;
 119   /* Flags: */
 120   unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC.  */
 121   unsigned min_after_vec: 1;  /* minimum address target label is
 122                                  after the ADDR_DIFF_VEC.  */
 123   unsigned max_after_vec: 1;  /* maximum address target label is
 124                                  after the ADDR_DIFF_VEC.  */
 125   unsigned min_after_base: 1; /* minimum address target label is
 126                                  after BASE.  */
 127   unsigned max_after_base: 1; /* maximum address target label is
 128                                  after BASE.  */
 129   /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
 130   unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned.  */
 131   unsigned : 2;
 132   unsigned scale : 8;
 133 } addr_diff_vec_flags;
 134
 135 /* Structure used to describe the attributes of a MEM.  These are hashed
 136    so MEMs that the same attributes share a data structure.  This means
 137    they cannot be modified in place.  If any element is nonzero, it means
 138    the value of the corresponding attribute is unknown.  */
 139 /* ALIGN and SIZE are the alignment and size of the MEM itself,
 140    while EXPR can describe a larger underlying object, which might have a
 141    stricter alignment; OFFSET is the offset of the MEM within that object.  */
 142 typedef struct GTY(()) mem_attrs
 143 {
 144   tree expr;                    /* expr corresponding to MEM.  */
 145   rtx offset;                   /* Offset from start of DECL, as CONST_INT.  */
 146   rtx size;                     /* Size in bytes, as a CONST_INT.  */
 147   alias_set_type alias;         /* Memory alias set.  */
 148   unsigned int align;           /* Alignment of MEM in bits.  */
 149   unsigned char addrspace;      /* Address space (0 for generic).  */
 150 } mem_attrs;
 151
 152 /* Structure used to describe the attributes of a REG in similar way as
 153    mem_attrs does for MEM above.  Note that the OFFSET field is calculated
 154    in the same way as for mem_attrs, rather than in the same way as a
 155    SUBREG_BYTE.  For example, if a big-endian target stores a byte
 156    object in the low part of a 4-byte register, the OFFSET field
 157    will be -3 rather than 0.  */
 158
 159 typedef struct GTY(()) reg_attrs {
 160   tree decl;                    /* decl corresponding to REG.  */
 161   HOST_WIDE_INT offset;         /* Offset from start of DECL.  */
 162 } reg_attrs;
 163
 164 /* Common union for an element of an rtx.  */
 165
 166 union rtunion_def
 167 {
 168   int rt_int;
 169   unsigned int rt_uint;
 170   const char *rt_str;
 171   rtx rt_rtx;
 172   rtvec rt_rtvec;
 173   enum machine_mode rt_type;
 174   addr_diff_vec_flags rt_addr_diff_vec_flags;
 175   struct cselib_val_struct *rt_cselib;
 176   struct bitmap_head_def *rt_bit;
 177   tree rt_tree;
 178   struct basic_block_def *rt_bb;
 179   mem_attrs *rt_mem;
 180   reg_attrs *rt_reg;
 181   struct constant_descriptor_rtx *rt_constant;
 182 };
 183 typedef union rtunion_def rtunion;
 184
 185 /* This structure remembers the position of a SYMBOL_REF within an
 186    object_block structure.  A SYMBOL_REF only provides this information
 187    if SYMBOL_REF_HAS_BLOCK_INFO_P is true.  */
 188 struct GTY(()) block_symbol {
 189   /* The usual SYMBOL_REF fields.  */
 190   rtunion GTY ((skip)) fld[3];
 191
 192   /* The block that contains this object.  */
 193   struct object_block *block;
 194
 195   /* The offset of this object from the start of its block.  It is negative
 196      if the symbol has not yet been assigned an offset.  */
 197   HOST_WIDE_INT offset;
 198 };
 199
 200 DEF_VEC_P(rtx);
 201 DEF_VEC_ALLOC_P(rtx,heap);
 202 DEF_VEC_ALLOC_P(rtx,gc);
 203
 204 /* Describes a group of objects that are to be placed together in such
 205    a way that their relative positions are known.  */
 206 struct GTY(()) object_block {
 207   /* The section in which these objects should be placed.  */
 208   section *sect;
 209
 210   /* The alignment of the first object, measured in bits.  */
 211   unsigned int alignment;
 212
 213   /* The total size of the objects, measured in bytes.  */
 214   HOST_WIDE_INT size;
 215
 216   /* The SYMBOL_REFs for each object.  The vector is sorted in
 217      order of increasing offset and the following conditions will
 218      hold for each element X:
 219
 220          SYMBOL_REF_HAS_BLOCK_INFO_P (X)
 221          !SYMBOL_REF_ANCHOR_P (X)
 222          SYMBOL_REF_BLOCK (X) == [address of this structure]
 223          SYMBOL_REF_BLOCK_OFFSET (X) >= 0.  */
 224   VEC(rtx,gc) *objects;
 225
 226   /* All the anchor SYMBOL_REFs used to address these objects, sorted
 227      in order of increasing offset, and then increasing TLS model.
 228      The following conditions will hold for each element X in this vector:
 229
 230          SYMBOL_REF_HAS_BLOCK_INFO_P (X)
 231          SYMBOL_REF_ANCHOR_P (X)
 232          SYMBOL_REF_BLOCK (X) == [address of this structure]
 233          SYMBOL_REF_BLOCK_OFFSET (X) >= 0.  */
 234   VEC(rtx,gc) *anchors;
 235 };
 236
 237 /* RTL expression ("rtx").  */
 238
 239 struct GTY((chain_next ("RTX_NEXT (&%h)"),
 240                     chain_prev ("RTX_PREV (&%h)"))) rtx_def {
 241   /* The kind of expression this is.  */
 242   ENUM_BITFIELD(rtx_code) code: 16;
 243
 244   /* The kind of value the expression has.  */
 245   ENUM_BITFIELD(machine_mode) mode : 8;
 246
 247   /* 1 in a MEM if we should keep the alias set for this mem unchanged
 248      when we access a component.
 249      1 in a CALL_INSN if it is a sibling call.
 250      1 in a SET that is for a return.
 251      In a CODE_LABEL, part of the two-bit alternate entry field.  */
 252   unsigned int jump : 1;
 253   /* In a CODE_LABEL, part of the two-bit alternate entry field.
 254      1 in a MEM if it cannot trap.
 255      1 in a CALL_INSN logically equivalent to
 256        ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
 257   unsigned int call : 1;
 258   /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
 259      1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
 260      1 in a SYMBOL_REF if it addresses something in the per-function
 261      constants pool.
 262      1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
 263      1 in a NOTE, or EXPR_LIST for a const call.
 264      1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch.  */
 265   unsigned int unchanging : 1;
 266   /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
 267      1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
 268      if it has been deleted.
 269      1 in a REG expression if corresponds to a variable declared by the user,
 270      0 for an internally generated temporary.
 271      1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
 272      1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
 273      non-local label.
 274      In a SYMBOL_REF, this flag is used for machine-specific purposes.
 275      In a PREFETCH, this flag indicates that it should be considered a scheduling
 276      barrier.  */
 277   unsigned int volatil : 1;
 278   /* 1 in a MEM referring to a field of an aggregate.
 279      0 if the MEM was a variable or the result of a * operator in C;
 280      1 if it was the result of a . or -> operator (on a struct) in C.
 281      1 in a REG if the register is used only in exit code a loop.
 282      1 in a SUBREG expression if was generated from a variable with a
 283      promoted mode.
 284      1 in a CODE_LABEL if the label is used for nonlocal gotos
 285      and must not be deleted even if its count is zero.
 286      1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
 287      together with the preceding insn.  Valid only within sched.
 288      1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
 289      from the target of a branch.  Valid from reorg until end of compilation;
 290      cleared before used.  */
 291   unsigned int in_struct : 1;
 292   /* At the end of RTL generation, 1 if this rtx is used.  This is used for
 293      copying shared structure.  See `unshare_all_rtl'.
 294      In a REG, this is not needed for that purpose, and used instead
 295      in `leaf_renumber_regs_insn'.
 296      1 in a SYMBOL_REF, means that emit_library_call
 297      has used it as the function.  */
 298   unsigned int used : 1;
 299   /* 1 in an INSN or a SET if this rtx is related to the call frame,
 300      either changing how we compute the frame address or saving and
 301      restoring registers in the prologue and epilogue.
 302      1 in a REG or MEM if it is a pointer.
 303      1 in a SYMBOL_REF if it addresses something in the per-function
 304      constant string pool.  */
 305   unsigned frame_related : 1;
 306   /* 1 in a REG or PARALLEL that is the current function's return value.
 307      1 in a MEM if it refers to a scalar.
 308      1 in a SYMBOL_REF for a weak symbol.
 309      1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
 310   unsigned return_val : 1;
 311
 312   /* The first element of the operands of this rtx.
 313      The number of operands and their types are controlled
 314      by the `code' field, according to rtl.def.  */
 315   union u {
 316     rtunion fld[1];
 317     HOST_WIDE_INT hwint[1];
 318     struct block_symbol block_sym;
 319     struct real_value rv;
 320     struct fixed_value fv;
 321   } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
 322 };
 323
 324 /* The size in bytes of an rtx header (code, mode and flags).  */
 325 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
 326
 327 /* The size in bytes of an rtx with code CODE.  */
 328 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
 329
 330 #define NULL_RTX (rtx) 0
 331
 332 /* The "next" and "previous" RTX, relative to this one.  */
 333
 334 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL                 \
 335                      : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
 336
 337 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
 338  */
 339 #define RTX_PREV(X) ((INSN_P (X)                        \
 340                       || NOTE_P (X)                     \
 341                       || BARRIER_P (X)                  \
 342                       || LABEL_P (X))                   \
 343                      && PREV_INSN (X) != NULL           \
 344                      && NEXT_INSN (PREV_INSN (X)) == X  \
 345                      ? PREV_INSN (X) : NULL)
 346
 347 /* Define macros to access the `code' field of the rtx.  */
 348
 349 #define GET_CODE(RTX)       ((enum rtx_code) (RTX)->code)
 350 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
 351
 352 #define GET_MODE(RTX)       ((enum machine_mode) (RTX)->mode)
 353 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
 354
 355 /* RTL vector.  These appear inside RTX's when there is a need
 356    for a variable number of things.  The principle use is inside
 357    PARALLEL expressions.  */
 358
 359 struct GTY(()) rtvec_def {
 360   int num_elem;         /* number of elements */
 361   rtx GTY ((length ("%h.num_elem"))) elem[1];
 362 };
 363
 364 #define NULL_RTVEC (rtvec) 0
 365
 366 #define GET_NUM_ELEM(RTVEC)             ((RTVEC)->num_elem)
 367 #define PUT_NUM_ELEM(RTVEC, NUM)        ((RTVEC)->num_elem = (NUM))
 368
 369 /* Predicate yielding nonzero iff X is an rtx for a register.  */
 370 #define REG_P(X) (GET_CODE (X) == REG)
 371
 372 /* Predicate yielding nonzero iff X is an rtx for a memory location.  */
 373 #define MEM_P(X) (GET_CODE (X) == MEM)
 374
 375 /* Predicate yielding nonzero iff X is an rtx for a constant integer.  */
 376 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
 377
 378 /* Predicate yielding nonzero iff X is a label insn.  */
 379 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
 380
 381 /* Predicate yielding nonzero iff X is a jump insn.  */
 382 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
 383
 384 /* Predicate yielding nonzero iff X is a call insn.  */
 385 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
 386
 387 /* Predicate yielding nonzero iff X is an insn that cannot jump.  */
 388 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
 389
 390 /* Predicate yielding nonzero iff X is a debug note/insn.  */
 391 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
 392
 393 /* Predicate yielding nonzero iff X is an insn that is not a debug insn.  */
 394 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
 395
 396 /* Nonzero if DEBUG_INSN_P may possibly hold.  */
 397 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
 398
 399 /* Predicate yielding nonzero iff X is a real insn.  */
 400 #define INSN_P(X) \
 401   (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
 402
 403 /* Predicate yielding nonzero iff X is a note insn.  */
 404 #define NOTE_P(X) (GET_CODE (X) == NOTE)
 405
 406 /* Predicate yielding nonzero iff X is a barrier insn.  */
 407 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
 408
 409 /* Predicate yielding nonzero iff X is a data for a jump table.  */
 410 #define JUMP_TABLE_DATA_P(INSN) \
 411   (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
 412                      GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
 413
 414 /* 1 if X is a unary operator.  */
 415
 416 #define UNARY_P(X)   \
 417   (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
 418
 419 /* 1 if X is a binary operator.  */
 420
 421 #define BINARY_P(X)   \
 422   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
 423
 424 /* 1 if X is an arithmetic operator.  */
 425
 426 #define ARITHMETIC_P(X)   \
 427   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK)                 \
 428     == RTX_ARITHMETIC_RESULT)
 429
 430 /* 1 if X is an arithmetic operator.  */
 431
 432 #define COMMUTATIVE_ARITH_P(X)   \
 433   (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
 434
 435 /* 1 if X is a commutative arithmetic operator or a comparison operator.
 436    These two are sometimes selected together because it is possible to
 437    swap the two operands.  */
 438
 439 #define SWAPPABLE_OPERANDS_P(X)   \
 440   ((1 << GET_RTX_CLASS (GET_CODE (X)))                                  \
 441     & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE)                  \
 442        | (1 << RTX_COMPARE)))
 443
 444 /* 1 if X is a non-commutative operator.  */
 445
 446 #define NON_COMMUTATIVE_P(X)   \
 447   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK)                \
 448     == RTX_NON_COMMUTATIVE_RESULT)
 449
 450 /* 1 if X is a commutative operator on integers.  */
 451
 452 #define COMMUTATIVE_P(X)   \
 453   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK)                \
 454     == RTX_COMMUTATIVE_RESULT)
 455
 456 /* 1 if X is a relational operator.  */
 457
 458 #define COMPARISON_P(X)   \
 459   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
 460
 461 /* 1 if X is a constant value that is an integer.  */
 462
 463 #define CONSTANT_P(X)   \
 464   (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
 465
 466 /* 1 if X can be used to represent an object.  */
 467 #define OBJECT_P(X)                                                     \
 468   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
 469
 470 /* General accessor macros for accessing the fields of an rtx.  */
 471
 472 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
 473 /* The bit with a star outside the statement expr and an & inside is
 474    so that N can be evaluated only once.  */
 475 #define RTL_CHECK1(RTX, N, C1) __extension__                            \
 476 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 477      const enum rtx_code _code = GET_CODE (_rtx);                       \
 478      if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                        \
 479        rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
 480                                 __FUNCTION__);                          \
 481      if (GET_RTX_FORMAT(_code)[_n] != C1)                               \
 482        rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__,        \
 483                                __FUNCTION__);                           \
 484      &_rtx->u.fld[_n]; }))
 485
 486 #define RTL_CHECK2(RTX, N, C1, C2) __extension__                        \
 487 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 488      const enum rtx_code _code = GET_CODE (_rtx);                       \
 489      if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                        \
 490        rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
 491                                 __FUNCTION__);                          \
 492      if (GET_RTX_FORMAT(_code)[_n] != C1                                \
 493          && GET_RTX_FORMAT(_code)[_n] != C2)                            \
 494        rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__,    \
 495                                __FUNCTION__);                           \
 496      &_rtx->u.fld[_n]; }))
 497
 498 #define RTL_CHECKC1(RTX, N, C) __extension__                            \
 499 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 500      if (GET_CODE (_rtx) != (C))                                        \
 501        rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__,           \
 502                                __FUNCTION__);                           \
 503      &_rtx->u.fld[_n]; }))
 504
 505 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__                       \
 506 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 507      const enum rtx_code _code = GET_CODE (_rtx);                       \
 508      if (_code != (C1) && _code != (C2))                                \
 509        rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__,    \
 510                                __FUNCTION__); \
 511      &_rtx->u.fld[_n]; }))
 512
 513 #define RTVEC_ELT(RTVEC, I) __extension__                               \
 514 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I);       \
 515      if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec))                         \
 516        rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__,       \
 517                                   __FUNCTION__);                        \
 518      &_rtvec->elem[_i]; }))
 519
 520 #define XWINT(RTX, N) __extension__                                     \
 521 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 522      const enum rtx_code _code = GET_CODE (_rtx);                       \
 523      if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                        \
 524        rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
 525                                 __FUNCTION__);                          \
 526      if (GET_RTX_FORMAT(_code)[_n] != 'w')                              \
 527        rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__,       \
 528                                __FUNCTION__);                           \
 529      &_rtx->u.hwint[_n]; }))
 530
 531 #define XCWINT(RTX, N, C) __extension__                                 \
 532 (*({ __typeof (RTX) const _rtx = (RTX);                                 \
 533      if (GET_CODE (_rtx) != (C))                                        \
 534        rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__,           \
 535                                __FUNCTION__);                           \
 536      &_rtx->u.hwint[N]; }))
 537
 538 #define XCMWINT(RTX, N, C, M) __extension__                             \
 539 (*({ __typeof (RTX) const _rtx = (RTX);                                 \
 540      if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M))              \
 541        rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__,     \
 542                                    __LINE__, __FUNCTION__);             \
 543      &_rtx->u.hwint[N]; }))
 544
 545 #define XCNMPRV(RTX, C, M) __extension__                                \
 546 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 547    if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M))                \
 548      rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__,        \
 549                                  __LINE__, __FUNCTION__);               \
 550    &_rtx->u.rv; })
 551
 552 #define XCNMPFV(RTX, C, M) __extension__                                \
 553 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 554    if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M))                \
 555      rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__,        \
 556                                  __LINE__, __FUNCTION__);               \
 557    &_rtx->u.fv; })
 558
 559 #define BLOCK_SYMBOL_CHECK(RTX) __extension__                           \
 560 ({ __typeof (RTX) const _symbol = (RTX);                                \
 561    const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
 562    if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0)                       \
 563      rtl_check_failed_block_symbol (__FILE__, __LINE__,                 \
 564                                     __FUNCTION__);                      \
 565    &_symbol->u.block_sym; })
 566
 567 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
 568                                      const char *)
 569     ATTRIBUTE_NORETURN;
 570 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
 571                                     const char *)
 572     ATTRIBUTE_NORETURN;
 573 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
 574                                     int, const char *)
 575     ATTRIBUTE_NORETURN;
 576 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
 577                                     int, const char *)
 578     ATTRIBUTE_NORETURN;
 579 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
 580                                     const char *, int, const char *)
 581     ATTRIBUTE_NORETURN;
 582 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
 583                                         bool, const char *, int, const char *)
 584     ATTRIBUTE_NORETURN;
 585 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
 586     ATTRIBUTE_NORETURN;
 587 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
 588                                        const char *)
 589     ATTRIBUTE_NORETURN;
 590
 591 #else   /* not ENABLE_RTL_CHECKING */
 592
 593 #define RTL_CHECK1(RTX, N, C1)      ((RTX)->u.fld[N])
 594 #define RTL_CHECK2(RTX, N, C1, C2)  ((RTX)->u.fld[N])
 595 #define RTL_CHECKC1(RTX, N, C)      ((RTX)->u.fld[N])
 596 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
 597 #define RTVEC_ELT(RTVEC, I)         ((RTVEC)->elem[I])
 598 #define XWINT(RTX, N)               ((RTX)->u.hwint[N])
 599 #define XCWINT(RTX, N, C)           ((RTX)->u.hwint[N])
 600 #define XCMWINT(RTX, N, C, M)       ((RTX)->u.hwint[N])
 601 #define XCNMWINT(RTX, N, C, M)      ((RTX)->u.hwint[N])
 602 #define XCNMPRV(RTX, C, M)          (&(RTX)->u.rv)
 603 #define XCNMPFV(RTX, C, M)          (&(RTX)->u.fv)
 604 #define BLOCK_SYMBOL_CHECK(RTX)     (&(RTX)->u.block_sym)
 605
 606 #endif
 607
 608 /* General accessor macros for accessing the flags of an rtx.  */
 609
 610 /* Access an individual rtx flag, with no checking of any kind.  */
 611 #define RTX_FLAG(RTX, FLAG)     ((RTX)->FLAG)
 612
 613 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
 614 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__                    \
 615 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 616    if (GET_CODE(_rtx) != C1)                                            \
 617      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 618                              __FUNCTION__);                             \
 619    _rtx; })
 620
 621 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__                \
 622 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 623    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2)                    \
 624      rtl_check_failed_flag  (NAME,_rtx, __FILE__, __LINE__,             \
 625                               __FUNCTION__);                            \
 626    _rtx; })
 627
 628 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__            \
 629 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 630    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 631        && GET_CODE(_rtx) != C3)                                         \
 632      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 633                              __FUNCTION__);                             \
 634    _rtx; })
 635
 636 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__        \
 637 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 638    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 639        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4)                 \
 640      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 641                               __FUNCTION__);                            \
 642    _rtx; })
 643
 644 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__    \
 645 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 646    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 647        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 648        && GET_CODE(_rtx) != C5)                                         \
 649      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 650                              __FUNCTION__);                             \
 651    _rtx; })
 652
 653 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6)              \
 654   __extension__                                                         \
 655 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 656    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 657        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 658        && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6)                 \
 659      rtl_check_failed_flag  (NAME,_rtx, __FILE__, __LINE__,             \
 660                              __FUNCTION__);                             \
 661    _rtx; })
 662
 663 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7)          \
 664   __extension__                                                         \
 665 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 666    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 667        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 668        && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6                  \
 669        && GET_CODE(_rtx) != C7)                                         \
 670      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 671                              __FUNCTION__);                             \
 672    _rtx; })
 673
 674 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8)      \
 675   __extension__                                                         \
 676 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 677    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 678        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 679        && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6                  \
 680        && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8)                 \
 681      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 682                              __FUNCTION__);                             \
 683    _rtx; })
 684
 685 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
 686                                    int, const char *)
 687     ATTRIBUTE_NORETURN
 688     ;
 689
 690 #else   /* not ENABLE_RTL_FLAG_CHECKING */
 691
 692 #define RTL_FLAG_CHECK1(NAME, RTX, C1)                                  (RTX)
 693 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2)                              (RTX)
 694 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3)                          (RTX)
 695 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4)                      (RTX)
 696 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5)          (RTX)
 697 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6)              (RTX)
 698 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7)          (RTX)
 699 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8)      (RTX)
 700 #endif
 701
 702 #define XINT(RTX, N)    (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
 703 #define XSTR(RTX, N)    (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
 704 #define XEXP(RTX, N)    (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
 705 #define XVEC(RTX, N)    (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
 706 #define XMODE(RTX, N)   (RTL_CHECK1 (RTX, N, 'M').rt_type)
 707 #define XBITMAP(RTX, N) (RTL_CHECK1 (RTX, N, 'b').rt_bit)
 708 #define XTREE(RTX, N)   (RTL_CHECK1 (RTX, N, 't').rt_tree)
 709 #define XBBDEF(RTX, N)  (RTL_CHECK1 (RTX, N, 'B').rt_bb)
 710 #define XTMPL(RTX, N)   (RTL_CHECK1 (RTX, N, 'T').rt_str)
 711
 712 #define XVECEXP(RTX, N, M)      RTVEC_ELT (XVEC (RTX, N), M)
 713 #define XVECLEN(RTX, N)         GET_NUM_ELEM (XVEC (RTX, N))
 714
 715 /* These are like XINT, etc. except that they expect a '0' field instead
 716    of the normal type code.  */
 717
 718 #define X0INT(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_int)
 719 #define X0UINT(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_uint)
 720 #define X0STR(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_str)
 721 #define X0EXP(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_rtx)
 722 #define X0VEC(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
 723 #define X0MODE(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_type)
 724 #define X0BITMAP(RTX, N)   (RTL_CHECK1 (RTX, N, '0').rt_bit)
 725 #define X0TREE(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_tree)
 726 #define X0BBDEF(RTX, N)    (RTL_CHECK1 (RTX, N, '0').rt_bb)
 727 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
 728 #define X0CSELIB(RTX, N)   (RTL_CHECK1 (RTX, N, '0').rt_cselib)
 729 #define X0MEMATTR(RTX, N)  (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
 730 #define X0REGATTR(RTX, N)  (RTL_CHECKC1 (RTX, N, REG).rt_reg)
 731 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
 732
 733 /* Access a '0' field with any type.  */
 734 #define X0ANY(RTX, N)      RTL_CHECK1 (RTX, N, '0')
 735
 736 #define XCINT(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_int)
 737 #define XCUINT(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_uint)
 738 #define XCSTR(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_str)
 739 #define XCEXP(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_rtx)
 740 #define XCVEC(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
 741 #define XCMODE(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_type)
 742 #define XCBITMAP(RTX, N, C)   (RTL_CHECKC1 (RTX, N, C).rt_bit)
 743 #define XCTREE(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_tree)
 744 #define XCBBDEF(RTX, N, C)    (RTL_CHECKC1 (RTX, N, C).rt_bb)
 745 #define XCCSELIB(RTX, N, C)   (RTL_CHECKC1 (RTX, N, C).rt_cselib)
 746
 747 #define XCVECEXP(RTX, N, M, C)  RTVEC_ELT (XCVEC (RTX, N, C), M)
 748 #define XCVECLEN(RTX, N, C)     GET_NUM_ELEM (XCVEC (RTX, N, C))
 749
 750 #define XC2EXP(RTX, N, C1, C2)      (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
 751 \f
 752 /* ACCESS MACROS for particular fields of insns.  */
 753
 754 /* Holds a unique number for each insn.
 755    These are not necessarily sequentially increasing.  */
 756 #define INSN_UID(INSN)  XINT (INSN, 0)
 757
 758 /* Chain insns together in sequence.  */
 759 #define PREV_INSN(INSN) XEXP (INSN, 1)
 760 #define NEXT_INSN(INSN) XEXP (INSN, 2)
 761
 762 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
 763 #define INSN_LOCATOR(INSN) XINT (INSN, 4)
 764 /* LOCATION of an RTX if relevant.  */
 765 #define RTL_LOCATION(X) (INSN_P (X) ? \
 766                          locator_location (INSN_LOCATOR (X)) \
 767                          : UNKNOWN_LOCATION)
 768 /* LOCATION of current INSN.  */
 769 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
 770 /* The body of an insn.  */
 771 #define PATTERN(INSN)   XEXP (INSN, 5)
 772
 773 /* Code number of instruction, from when it was recognized.
 774    -1 means this instruction has not been recognized yet.  */
 775 #define INSN_CODE(INSN) XINT (INSN, 6)
 776
 777 #define RTX_FRAME_RELATED_P(RTX)                                        \
 778   (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN,      \
 779                    CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
 780
 781 /* 1 if RTX is an insn that has been deleted.  */
 782 #define INSN_DELETED_P(RTX)                                             \
 783   (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN,           \
 784                    CALL_INSN, JUMP_INSN,                                \
 785                    CODE_LABEL, BARRIER, NOTE)->volatil)
 786
 787 /* 1 if RTX is a call to a const function.  Built from ECF_CONST and
 788    TREE_READONLY.  */
 789 #define RTL_CONST_CALL_P(RTX)                                   \
 790   (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
 791
 792 /* 1 if RTX is a call to a pure function.  Built from ECF_PURE and
 793    DECL_PURE_P.  */
 794 #define RTL_PURE_CALL_P(RTX)                                    \
 795   (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
 796
 797 /* 1 if RTX is a call to a const or pure function.  */
 798 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
 799   (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
 800
 801 /* 1 if RTX is a call to a looping const or pure function.  Built from
 802    ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P.  */
 803 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX)                                   \
 804   (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
 805
 806 /* 1 if RTX is a call_insn for a sibling call.  */
 807 #define SIBLING_CALL_P(RTX)                                             \
 808   (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
 809
 810 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch.  */
 811 #define INSN_ANNULLED_BRANCH_P(RTX)                                     \
 812   (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
 813
 814 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
 815    If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
 816    executed if the branch is taken.  For annulled branches with this bit
 817    clear, the insn should be executed only if the branch is not taken.  */
 818 #define INSN_FROM_TARGET_P(RTX)                                         \
 819   (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
 820
 821 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
 822    See the comments for ADDR_DIFF_VEC in rtl.def.  */
 823 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
 824
 825 /* In a VALUE, the value cselib has assigned to RTX.
 826    This is a "struct cselib_val_struct", see cselib.h.  */
 827 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
 828
 829 /* Holds a list of notes on what this insn does to various REGs.
 830    It is a chain of EXPR_LIST rtx's, where the second operand is the
 831    chain pointer and the first operand is the REG being described.
 832    The mode field of the EXPR_LIST contains not a real machine mode
 833    but a value from enum reg_note.  */
 834 #define REG_NOTES(INSN) XEXP(INSN, 7)
 835
 836 enum reg_note
 837 {
 838 #define DEF_REG_NOTE(NAME) NAME,
 839 #include "reg-notes.def"
 840 #undef DEF_REG_NOTE
 841   REG_NOTE_MAX
 842 };
 843
 844 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST.  */
 845 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
 846 #define PUT_REG_NOTE_KIND(LINK, KIND) \
 847   PUT_MODE (LINK, (enum machine_mode) (KIND))
 848
 849 /* Names for REG_NOTE's in EXPR_LIST insn's.  */
 850
 851 extern const char * const reg_note_name[];
 852 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
 853
 854 /* This field is only present on CALL_INSNs.  It holds a chain of EXPR_LIST of
 855    USE and CLOBBER expressions.
 856      USE expressions list the registers filled with arguments that
 857    are passed to the function.
 858      CLOBBER expressions document the registers explicitly clobbered
 859    by this CALL_INSN.
 860      Pseudo registers can not be mentioned in this list.  */
 861 #define CALL_INSN_FUNCTION_USAGE(INSN)  XEXP(INSN, 8)
 862
 863 /* The label-number of a code-label.  The assembler label
 864    is made from `L' and the label-number printed in decimal.
 865    Label numbers are unique in a compilation.  */
 866 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
 867
 868 /* In a NOTE that is a line number, this is a string for the file name that the
 869    line is in.  We use the same field to record block numbers temporarily in
 870    NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes.  (We avoid lots of casts
 871    between ints and pointers if we use a different macro for the block number.)
 872    */
 873
 874 /* Opaque data.  */
 875 #define NOTE_DATA(INSN)         RTL_CHECKC1 (INSN, 4, NOTE)
 876 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
 877 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
 878 #define NOTE_BLOCK(INSN)        XCTREE (INSN, 4, NOTE)
 879 #define NOTE_EH_HANDLER(INSN)   XCINT (INSN, 4, NOTE)
 880 #define NOTE_BASIC_BLOCK(INSN)  XCBBDEF (INSN, 4, NOTE)
 881 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
 882
 883 /* In a NOTE that is a line number, this is the line number.
 884    Other kinds of NOTEs are identified by negative numbers here.  */
 885 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
 886
 887 /* Nonzero if INSN is a note marking the beginning of a basic block.  */
 888 #define NOTE_INSN_BASIC_BLOCK_P(INSN)                   \
 889   (GET_CODE (INSN) == NOTE                              \
 890    && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
 891
 892 /* Variable declaration and the location of a variable.  */
 893 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
 894 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
 895
 896 /* Initialization status of the variable in the location.  Status
 897    can be unknown, uninitialized or initialized.  See enumeration
 898    type below.  */
 899 #define PAT_VAR_LOCATION_STATUS(PAT) \
 900   ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
 901
 902 /* Accessors for a NOTE_INSN_VAR_LOCATION.  */
 903 #define NOTE_VAR_LOCATION_DECL(NOTE) \
 904   PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
 905 #define NOTE_VAR_LOCATION_LOC(NOTE) \
 906   PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
 907 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
 908   PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
 909
 910 /* The VAR_LOCATION rtx in a DEBUG_INSN.  */
 911 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
 912
 913 /* Accessors for a tree-expanded var location debug insn.  */
 914 #define INSN_VAR_LOCATION_DECL(INSN) \
 915   PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
 916 #define INSN_VAR_LOCATION_LOC(INSN) \
 917   PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
 918 #define INSN_VAR_LOCATION_STATUS(INSN) \
 919   PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
 920
 921 /* Expand to the RTL that denotes an unknown variable location in a
 922    DEBUG_INSN.  */
 923 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
 924
 925 /* Determine whether X is such an unknown location.  */
 926 #define VAR_LOC_UNKNOWN_P(X) \
 927   (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
 928
 929 /* 1 if RTX is emitted after a call, but it should take effect before
 930    the call returns.  */
 931 #define NOTE_DURING_CALL_P(RTX)                         \
 932   (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
 933
 934 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX.  */
 935 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
 936
 937 /* Possible initialization status of a variable.   When requested
 938    by the user, this information is tracked and recorded in the DWARF
 939    debug information, along with the variable's location.  */
 940 enum var_init_status
 941 {
 942   VAR_INIT_STATUS_UNKNOWN,
 943   VAR_INIT_STATUS_UNINITIALIZED,
 944   VAR_INIT_STATUS_INITIALIZED
 945 };
 946
 947 /* Codes that appear in the NOTE_KIND field for kinds of notes
 948    that are not line numbers.  These codes are all negative.
 949
 950    Notice that we do not try to use zero here for any of
 951    the special note codes because sometimes the source line
 952    actually can be zero!  This happens (for example) when we
 953    are generating code for the per-translation-unit constructor
 954    and destructor routines for some C++ translation unit.  */
 955
 956 enum insn_note
 957 {
 958 #define DEF_INSN_NOTE(NAME) NAME,
 959 #include "insn-notes.def"
 960 #undef DEF_INSN_NOTE
 961
 962   NOTE_INSN_MAX
 963 };
 964
 965 /* Names for NOTE insn's other than line numbers.  */
 966
 967 extern const char * const note_insn_name[NOTE_INSN_MAX];
 968 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
 969   (note_insn_name[(NOTE_CODE)])
 970
 971 /* The name of a label, in case it corresponds to an explicit label
 972    in the input source code.  */
 973 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
 974
 975 /* In jump.c, each label contains a count of the number
 976    of LABEL_REFs that point at it, so unused labels can be deleted.  */
 977 #define LABEL_NUSES(RTX) XCINT (RTX, 4, CODE_LABEL)
 978
 979 /* Labels carry a two-bit field composed of the ->jump and ->call
 980    bits.  This field indicates whether the label is an alternate
 981    entry point, and if so, what kind.  */
 982 enum label_kind
 983 {
 984   LABEL_NORMAL = 0,     /* ordinary label */
 985   LABEL_STATIC_ENTRY,   /* alternate entry point, not exported */
 986   LABEL_GLOBAL_ENTRY,   /* alternate entry point, exported */
 987   LABEL_WEAK_ENTRY      /* alternate entry point, exported as weak symbol */
 988 };
 989
 990 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
 991
 992 /* Retrieve the kind of LABEL.  */
 993 #define LABEL_KIND(LABEL) __extension__                                 \
 994 ({ __typeof (LABEL) const _label = (LABEL);                             \
 995    if (GET_CODE (_label) != CODE_LABEL)                                 \
 996      rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__,   \
 997                             __FUNCTION__);                              \
 998    (enum label_kind) ((_label->jump << 1) | _label->call); })
 999
1000 /* Set the kind of LABEL.  */
1001 #define SET_LABEL_KIND(LABEL, KIND) do {                                \
1002    __typeof (LABEL) const _label = (LABEL);                             \
1003    const unsigned int _kind = (KIND);                                   \
1004    if (GET_CODE (_label) != CODE_LABEL)                                 \
1005      rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1006                             __FUNCTION__);                              \
1007    _label->jump = ((_kind >> 1) & 1);                                   \
1008    _label->call = (_kind & 1);                                          \
1009 } while (0)
1010
1011 #else
1012
1013 /* Retrieve the kind of LABEL.  */
1014 #define LABEL_KIND(LABEL) \
1015    ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1016
1017 /* Set the kind of LABEL.  */
1018 #define SET_LABEL_KIND(LABEL, KIND) do {                                \
1019    rtx const _label = (LABEL);                                          \
1020    const unsigned int _kind = (KIND);                                   \
1021    _label->jump = ((_kind >> 1) & 1);                                   \
1022    _label->call = (_kind & 1);                                          \
1023 } while (0)
1024
1025 #endif /* rtl flag checking */
1026
1027 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1028
1029 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1030    so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1031    be decremented and possibly the label can be deleted.  */
1032 #define JUMP_LABEL(INSN)   XCEXP (INSN, 8, JUMP_INSN)
1033
1034 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1035    goes through all the LABEL_REFs that jump to that label.  The chain
1036    eventually winds up at the CODE_LABEL: it is circular.  */
1037 #define LABEL_REFS(LABEL) XCEXP (LABEL, 5, CODE_LABEL)
1038 \f
1039 /* For a REG rtx, REGNO extracts the register number.  REGNO can only
1040    be used on RHS.  Use SET_REGNO to change the value.  */
1041 #define REGNO(RTX) (rhs_regno(RTX))
1042 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1043
1044 /* ORIGINAL_REGNO holds the number the register originally had; for a
1045    pseudo register turned into a hard reg this will hold the old pseudo
1046    register number.  */
1047 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1048
1049 /* Force the REGNO macro to only be used on the lhs.  */
1050 static inline unsigned int
1051 rhs_regno (const_rtx x)
1052 {
1053   return XCUINT (x, 0, REG);
1054 }
1055
1056
1057
1058 /* 1 if RTX is a reg or parallel that is the current function's return
1059    value.  */
1060 #define REG_FUNCTION_VALUE_P(RTX)                                       \
1061   (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1062
1063 /* 1 if RTX is a reg that corresponds to a variable declared by the user.  */
1064 #define REG_USERVAR_P(RTX)                                              \
1065   (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1066
1067 /* 1 if RTX is a reg that holds a pointer value.  */
1068 #define REG_POINTER(RTX)                                                \
1069   (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1070
1071 /* 1 if RTX is a mem that holds a pointer value.  */
1072 #define MEM_POINTER(RTX)                                                \
1073   (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1074
1075 /* 1 if the given register REG corresponds to a hard register.  */
1076 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1077
1078 /* 1 if the given register number REG_NO corresponds to a hard register.  */
1079 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1080
1081 /* For a CONST_INT rtx, INTVAL extracts the integer.  */
1082 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1083 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1084
1085 /* For a CONST_DOUBLE:
1086    For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1087      low-order word and ..._HIGH the high-order.
1088    For a float, there is a REAL_VALUE_TYPE structure, and
1089      CONST_DOUBLE_REAL_VALUE(r) is a pointer to it.  */
1090 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1091 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1092 #define CONST_DOUBLE_REAL_VALUE(r) \
1093   ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1094
1095 #define CONST_FIXED_VALUE(r) \
1096   ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1097 #define CONST_FIXED_VALUE_HIGH(r) \
1098   ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1099 #define CONST_FIXED_VALUE_LOW(r) \
1100   ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1101
1102 /* For a CONST_VECTOR, return element #n.  */
1103 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1104
1105 /* For a CONST_VECTOR, return the number of elements in a vector.  */
1106 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1107
1108 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1109    SUBREG_BYTE extracts the byte-number.  */
1110
1111 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1112 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1113
1114 /* in rtlanal.c */
1115 /* Return the right cost to give to an operation
1116    to make the cost of the corresponding register-to-register instruction
1117    N times that of a fast register-to-register instruction.  */
1118 #define COSTS_N_INSNS(N) ((N) * 4)
1119
1120 /* Maximum cost of an rtl expression.  This value has the special meaning
1121    not to use an rtx with this cost under any circumstances.  */
1122 #define MAX_COST INT_MAX
1123
1124 extern void init_rtlanal (void);
1125 extern int rtx_cost (rtx, enum rtx_code, bool);
1126 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1127 extern unsigned int subreg_lsb (const_rtx);
1128 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1129                                   unsigned int);
1130 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1131                                          unsigned int, enum machine_mode);
1132 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1133                                            unsigned int, enum machine_mode);
1134 extern unsigned int subreg_regno (const_rtx);
1135 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1136                                   unsigned int, enum machine_mode);
1137 extern unsigned int subreg_nregs (const_rtx);
1138 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1139 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1140 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1141 extern bool constant_pool_constant_p (rtx);
1142 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1143 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1144
1145
1146 /* 1 if RTX is a subreg containing a reg that is already known to be
1147    sign- or zero-extended from the mode of the subreg to the mode of
1148    the reg.  SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1149    extension.
1150
1151    When used as a LHS, is means that this extension must be done
1152    when assigning to SUBREG_REG.  */
1153
1154 #define SUBREG_PROMOTED_VAR_P(RTX)                                      \
1155   (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1156
1157 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL)                          \
1158 do {                                                                    \
1159   rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1160   if ((VAL) < 0)                                                        \
1161     _rtx->volatil = 1;                                                  \
1162   else {                                                                \
1163     _rtx->volatil = 0;                                                  \
1164     _rtx->unchanging = (VAL);                                           \
1165   }                                                                     \
1166 } while (0)
1167
1168 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P().  In that case
1169    this gives the necessary extensions:
1170    0  - signed
1171    1  - normal unsigned
1172    -1 - pointer unsigned, which most often can be handled like unsigned
1173         extension, except for generating instructions where we need to
1174         emit special code (ptr_extend insns) on some architectures.  */
1175
1176 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1177   ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1178    ? -1 : (int) (RTX)->unchanging)
1179
1180 /* Access various components of an ASM_OPERANDS rtx.  */
1181
1182 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1183 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1184 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1185 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1186 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1187 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1188 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1189 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1190   XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1191 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1192   XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1193 #define ASM_OPERANDS_INPUT_MODE(RTX, N)  \
1194   GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1195 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1196 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1197 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1198 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1199 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1200
1201 /* 1 if RTX is a mem that is statically allocated in read-only memory.  */
1202 #define MEM_READONLY_P(RTX) \
1203   (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1204
1205 /* 1 if RTX is a mem and we should keep the alias set for this mem
1206    unchanged when we access a component.  Set to 1, or example, when we
1207    are already in a non-addressable component of an aggregate.  */
1208 #define MEM_KEEP_ALIAS_SET_P(RTX)                                       \
1209   (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1210
1211 /* 1 if RTX is a mem or asm_operand for a volatile reference.  */
1212 #define MEM_VOLATILE_P(RTX)                                             \
1213   (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS,          \
1214                    ASM_INPUT)->volatil)
1215
1216 /* 1 if RTX is a mem that refers to an aggregate, either to the
1217    aggregate itself or to a field of the aggregate.  If zero, RTX may
1218    or may not be such a reference.  */
1219 #define MEM_IN_STRUCT_P(RTX)                                            \
1220   (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1221
1222 /* 1 if RTX is a MEM that refers to a scalar.  If zero, RTX may or may
1223    not refer to a scalar.  */
1224 #define MEM_SCALAR_P(RTX)                                               \
1225   (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1226
1227 /* 1 if RTX is a mem that cannot trap.  */
1228 #define MEM_NOTRAP_P(RTX) \
1229   (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1230
1231 /* If VAL is nonzero, set MEM_IN_STRUCT_P and clear MEM_SCALAR_P in
1232    RTX.  Otherwise, vice versa.  Use this macro only when you are
1233    *sure* that you know that the MEM is in a structure, or is a
1234    scalar.  VAL is evaluated only once.  */
1235 #define MEM_SET_IN_STRUCT_P(RTX, VAL)           \
1236 do {                                            \
1237   if (VAL)                                      \
1238     {                                           \
1239       MEM_IN_STRUCT_P (RTX) = 1;                \
1240       MEM_SCALAR_P (RTX) = 0;                   \
1241     }                                           \
1242   else                                          \
1243     {                                           \
1244       MEM_IN_STRUCT_P (RTX) = 0;                \
1245       MEM_SCALAR_P (RTX) = 1;                   \
1246     }                                           \
1247 } while (0)
1248
1249 /* The memory attribute block.  We provide access macros for each value
1250    in the block and provide defaults if none specified.  */
1251 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1252
1253 /* The register attribute block.  We provide access macros for each value
1254    in the block and provide defaults if none specified.  */
1255 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1256
1257 /* For a MEM rtx, the alias set.  If 0, this MEM is not in any alias
1258    set, and may alias anything.  Otherwise, the MEM can only alias
1259    MEMs in a conflicting alias set.  This value is set in a
1260    language-dependent manner in the front-end, and should not be
1261    altered in the back-end.  These set numbers are tested with
1262    alias_sets_conflict_p.  */
1263 #define MEM_ALIAS_SET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->alias)
1264
1265 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1266    refer to part of a DECL.  It may also be a COMPONENT_REF.  */
1267 #define MEM_EXPR(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->expr)
1268
1269 /* For a MEM rtx, the offset from the start of MEM_EXPR, if known, as a
1270    RTX that is always a CONST_INT.  */
1271 #define MEM_OFFSET(RTX) (MEM_ATTRS (RTX) == 0 ? 0 : MEM_ATTRS (RTX)->offset)
1272
1273 /* For a MEM rtx, the address space.  */
1274 #define MEM_ADDR_SPACE(RTX) (MEM_ATTRS (RTX) == 0 ? ADDR_SPACE_GENERIC \
1275                                                   : MEM_ATTRS (RTX)->addrspace)
1276
1277 /* For a MEM rtx, the size in bytes of the MEM, if known, as an RTX that
1278    is always a CONST_INT.  */
1279 #define MEM_SIZE(RTX)                                                   \
1280 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->size                           \
1281  : GET_MODE (RTX) != BLKmode ? GEN_INT (GET_MODE_SIZE (GET_MODE (RTX))) \
1282  : 0)
1283
1284 /* For a MEM rtx, the alignment in bits.  We can use the alignment of the
1285    mode as a default when STRICT_ALIGNMENT, but not if not.  */
1286 #define MEM_ALIGN(RTX)                                                  \
1287 (MEM_ATTRS (RTX) != 0 ? MEM_ATTRS (RTX)->align                          \
1288  : (STRICT_ALIGNMENT && GET_MODE (RTX) != BLKmode                       \
1289     ? GET_MODE_ALIGNMENT (GET_MODE (RTX)) : BITS_PER_UNIT))
1290
1291 /* For a REG rtx, the decl it is known to refer to, if it is known to
1292    refer to part of a DECL.  */
1293 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1294
1295 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1296    HOST_WIDE_INT.  */
1297 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1298
1299 /* Copy the attributes that apply to memory locations from RHS to LHS.  */
1300 #define MEM_COPY_ATTRIBUTES(LHS, RHS)                           \
1301   (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS),                 \
1302    MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS),               \
1303    MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS),                     \
1304    MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS),                     \
1305    MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS),                 \
1306    MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS),     \
1307    MEM_POINTER (LHS) = MEM_POINTER (RHS),                       \
1308    MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1309
1310 /* 1 if RTX is a label_ref for a nonlocal label.  */
1311 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1312    REG_LABEL_TARGET note.  */
1313 #define LABEL_REF_NONLOCAL_P(RTX)                                       \
1314   (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1315
1316 /* 1 if RTX is a code_label that should always be considered to be needed.  */
1317 #define LABEL_PRESERVE_P(RTX)                                           \
1318   (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1319
1320 /* During sched, 1 if RTX is an insn that must be scheduled together
1321    with the preceding insn.  */
1322 #define SCHED_GROUP_P(RTX)                                              \
1323   (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN,            \
1324                    JUMP_INSN, CALL_INSN                                 \
1325                    )->in_struct)
1326
1327 /* For a SET rtx, SET_DEST is the place that is set
1328    and SET_SRC is the value it is set to.  */
1329 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1330 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1331 #define SET_IS_RETURN_P(RTX)                                            \
1332   (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1333
1334 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression.  */
1335 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1336 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1337
1338 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1339    conditionally executing the code on, COND_EXEC_CODE is the code
1340    to execute if the condition is true.  */
1341 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1342 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1343
1344 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1345    constants pool.  */
1346 #define CONSTANT_POOL_ADDRESS_P(RTX)                                    \
1347   (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1348
1349 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1350    tree constant pool.  This information is private to varasm.c.  */
1351 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX)                               \
1352   (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P",                      \
1353                    (RTX), SYMBOL_REF)->frame_related)
1354
1355 /* Used if RTX is a symbol_ref, for machine-specific purposes.  */
1356 #define SYMBOL_REF_FLAG(RTX)                                            \
1357   (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1358
1359 /* 1 if RTX is a symbol_ref that has been the library function in
1360    emit_library_call.  */
1361 #define SYMBOL_REF_USED(RTX)                                            \
1362   (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1363
1364 /* 1 if RTX is a symbol_ref for a weak symbol.  */
1365 #define SYMBOL_REF_WEAK(RTX)                                            \
1366   (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1367
1368 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1369    SYMBOL_REF_CONSTANT.  */
1370 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1371
1372 /* Set RTX's SYMBOL_REF_DECL to DECL.  RTX must not be a constant
1373    pool symbol.  */
1374 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1375   (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1376
1377 /* The tree (decl or constant) associated with the symbol, or null.  */
1378 #define SYMBOL_REF_DECL(RTX) \
1379   (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1380
1381 /* Set RTX's SYMBOL_REF_CONSTANT to C.  RTX must be a constant pool symbol.  */
1382 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1383   (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1384
1385 /* The rtx constant pool entry for a symbol, or null.  */
1386 #define SYMBOL_REF_CONSTANT(RTX) \
1387   (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1388
1389 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1390    information derivable from the tree decl associated with this symbol.
1391    Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1392    decl.  In some cases this is a bug.  But beyond that, it's nice to cache
1393    this information to avoid recomputing it.  Finally, this allows space for
1394    the target to store more than one bit of information, as with
1395    SYMBOL_REF_FLAG.  */
1396 #define SYMBOL_REF_FLAGS(RTX)   X0INT ((RTX), 1)
1397
1398 /* These flags are common enough to be defined for all targets.  They
1399    are computed by the default version of targetm.encode_section_info.  */
1400
1401 /* Set if this symbol is a function.  */
1402 #define SYMBOL_FLAG_FUNCTION    (1 << 0)
1403 #define SYMBOL_REF_FUNCTION_P(RTX) \
1404   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1405 /* Set if targetm.binds_local_p is true.  */
1406 #define SYMBOL_FLAG_LOCAL       (1 << 1)
1407 #define SYMBOL_REF_LOCAL_P(RTX) \
1408   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1409 /* Set if targetm.in_small_data_p is true.  */
1410 #define SYMBOL_FLAG_SMALL       (1 << 2)
1411 #define SYMBOL_REF_SMALL_P(RTX) \
1412   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1413 /* The three-bit field at [5:3] is true for TLS variables; use
1414    SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model.  */
1415 #define SYMBOL_FLAG_TLS_SHIFT   3
1416 #define SYMBOL_REF_TLS_MODEL(RTX) \
1417   ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1418 /* Set if this symbol is not defined in this translation unit.  */
1419 #define SYMBOL_FLAG_EXTERNAL    (1 << 6)
1420 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1421   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1422 /* Set if this symbol has a block_symbol structure associated with it.  */
1423 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1424 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1425   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1426 /* Set if this symbol is a section anchor.  SYMBOL_REF_ANCHOR_P implies
1427    SYMBOL_REF_HAS_BLOCK_INFO_P.  */
1428 #define SYMBOL_FLAG_ANCHOR      (1 << 8)
1429 #define SYMBOL_REF_ANCHOR_P(RTX) \
1430   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1431
1432 /* Subsequent bits are available for the target to use.  */
1433 #define SYMBOL_FLAG_MACH_DEP_SHIFT      9
1434 #define SYMBOL_FLAG_MACH_DEP            (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1435
1436 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1437    structure to which the symbol belongs, or NULL if it has not been
1438    assigned a block.  */
1439 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1440
1441 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1442    the first object in SYMBOL_REF_BLOCK (RTX).  The value is negative if
1443    RTX has not yet been assigned to a block, or it has not been given an
1444    offset within that block.  */
1445 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1446
1447 /* True if RTX is flagged to be a scheduling barrier.  */
1448 #define PREFETCH_SCHEDULE_BARRIER_P(RTX)                                        \
1449   (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1450
1451 /* Indicate whether the machine has any sort of auto increment addressing.
1452    If not, we can avoid checking for REG_INC notes.  */
1453
1454 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1455      || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1456      || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1457      || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1458 #define AUTO_INC_DEC
1459 #endif
1460
1461 /* Define a macro to look for REG_INC notes,
1462    but save time on machines where they never exist.  */
1463
1464 #ifdef AUTO_INC_DEC
1465 #define FIND_REG_INC_NOTE(INSN, REG)                    \
1466   ((REG) != NULL_RTX && REG_P ((REG))                   \
1467    ? find_regno_note ((INSN), REG_INC, REGNO (REG))     \
1468    : find_reg_note ((INSN), REG_INC, (REG)))
1469 #else
1470 #define FIND_REG_INC_NOTE(INSN, REG) 0
1471 #endif
1472
1473 #ifndef HAVE_PRE_INCREMENT
1474 #define HAVE_PRE_INCREMENT 0
1475 #endif
1476
1477 #ifndef HAVE_PRE_DECREMENT
1478 #define HAVE_PRE_DECREMENT 0
1479 #endif
1480
1481 #ifndef HAVE_POST_INCREMENT
1482 #define HAVE_POST_INCREMENT 0
1483 #endif
1484
1485 #ifndef HAVE_POST_DECREMENT
1486 #define HAVE_POST_DECREMENT 0
1487 #endif
1488
1489 #ifndef HAVE_POST_MODIFY_DISP
1490 #define HAVE_POST_MODIFY_DISP 0
1491 #endif
1492
1493 #ifndef HAVE_POST_MODIFY_REG
1494 #define HAVE_POST_MODIFY_REG 0
1495 #endif
1496
1497 #ifndef HAVE_PRE_MODIFY_DISP
1498 #define HAVE_PRE_MODIFY_DISP 0
1499 #endif
1500
1501 #ifndef HAVE_PRE_MODIFY_REG
1502 #define HAVE_PRE_MODIFY_REG 0
1503 #endif
1504
1505
1506 /* Some architectures do not have complete pre/post increment/decrement
1507    instruction sets, or only move some modes efficiently.  These macros
1508    allow us to tune autoincrement generation.  */
1509
1510 #ifndef USE_LOAD_POST_INCREMENT
1511 #define USE_LOAD_POST_INCREMENT(MODE)   HAVE_POST_INCREMENT
1512 #endif
1513
1514 #ifndef USE_LOAD_POST_DECREMENT
1515 #define USE_LOAD_POST_DECREMENT(MODE)   HAVE_POST_DECREMENT
1516 #endif
1517
1518 #ifndef USE_LOAD_PRE_INCREMENT
1519 #define USE_LOAD_PRE_INCREMENT(MODE)    HAVE_PRE_INCREMENT
1520 #endif
1521
1522 #ifndef USE_LOAD_PRE_DECREMENT
1523 #define USE_LOAD_PRE_DECREMENT(MODE)    HAVE_PRE_DECREMENT
1524 #endif
1525
1526 #ifndef USE_STORE_POST_INCREMENT
1527 #define USE_STORE_POST_INCREMENT(MODE)  HAVE_POST_INCREMENT
1528 #endif
1529
1530 #ifndef USE_STORE_POST_DECREMENT
1531 #define USE_STORE_POST_DECREMENT(MODE)  HAVE_POST_DECREMENT
1532 #endif
1533
1534 #ifndef USE_STORE_PRE_INCREMENT
1535 #define USE_STORE_PRE_INCREMENT(MODE)   HAVE_PRE_INCREMENT
1536 #endif
1537
1538 #ifndef USE_STORE_PRE_DECREMENT
1539 #define USE_STORE_PRE_DECREMENT(MODE)   HAVE_PRE_DECREMENT
1540 #endif
1541 \f
1542 /* Nonzero when we are generating CONCATs.  */
1543 extern int generating_concat_p;
1544
1545 /* Nonzero when we are expanding trees to RTL.  */
1546 extern int currently_expanding_to_rtl;
1547
1548 /* Generally useful functions.  */
1549
1550 /* In expmed.c */
1551 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1552
1553 /* In explow.c */
1554 extern void set_stack_check_libfunc (rtx);
1555 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1556 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1557
1558 /* In emit-rtl.c */
1559 extern rtx gen_blockage (void);
1560 extern rtvec gen_rtvec (int, ...);
1561 extern rtx copy_insn_1 (rtx);
1562 extern rtx copy_insn (rtx);
1563 extern rtx gen_int_mode (HOST_WIDE_INT, enum machine_mode);
1564 extern rtx emit_copy_of_insn_after (rtx, rtx);
1565 extern void set_reg_attrs_from_value (rtx, rtx);
1566 extern void set_reg_attrs_for_parm (rtx, rtx);
1567 extern void set_reg_attrs_for_decl_rtl (tree t, rtx x);
1568 extern void adjust_reg_mode (rtx, enum machine_mode);
1569 extern int mem_expr_equal_p (const_tree, const_tree);
1570
1571 /* In rtl.c */
1572 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1573 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1574
1575 extern rtvec rtvec_alloc (int);
1576 extern rtvec shallow_copy_rtvec (rtvec);
1577 extern bool shared_const_p (const_rtx);
1578 extern rtx copy_rtx (rtx);
1579 extern void dump_rtx_statistics (void);
1580
1581 /* In emit-rtl.c */
1582 extern rtx copy_rtx_if_shared (rtx);
1583
1584 /* In rtl.c */
1585 extern unsigned int rtx_size (const_rtx);
1586 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1587 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1588 extern int rtx_equal_p (const_rtx, const_rtx);
1589
1590 /* In emit-rtl.c */
1591 extern rtvec gen_rtvec_v (int, rtx *);
1592 extern rtx gen_reg_rtx (enum machine_mode);
1593 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1594 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1595 extern rtx gen_reg_rtx_and_attrs (rtx);
1596 extern rtx gen_label_rtx (void);
1597 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1598
1599 /* In cse.c */
1600 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1601
1602 /* In emit-rtl.c */
1603 extern rtx gen_highpart (enum machine_mode, rtx);
1604 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1605 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1606
1607 /* In emit-rtl.c */
1608 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1609 extern int subreg_lowpart_p (const_rtx);
1610 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1611                                            enum machine_mode);
1612 extern unsigned int subreg_highpart_offset (enum machine_mode,
1613                                             enum machine_mode);
1614 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1615 extern rtx make_safe_from (rtx, rtx);
1616 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1617                                               addr_space_t);
1618 #define convert_memory_address(to_mode,x) \
1619         convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1620 extern rtx get_insns (void);
1621 extern const char *get_insn_name (int);
1622 extern rtx get_last_insn (void);
1623 extern rtx get_last_insn_anywhere (void);
1624 extern rtx get_first_nonnote_insn (void);
1625 extern rtx get_last_nonnote_insn (void);
1626 extern void start_sequence (void);
1627 extern void push_to_sequence (rtx);
1628 extern void push_to_sequence2 (rtx, rtx);
1629 extern void end_sequence (void);
1630 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1631                                enum machine_mode);
1632
1633 /* In loop-iv.c  */
1634
1635 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1636
1637 /* In varasm.c  */
1638 extern rtx force_const_mem (enum machine_mode, rtx);
1639
1640 /* In varasm.c  */
1641
1642 struct function;
1643 extern rtx get_pool_constant (rtx);
1644 extern rtx get_pool_constant_mark (rtx, bool *);
1645 extern enum machine_mode get_pool_mode (const_rtx);
1646 extern rtx simplify_subtraction (rtx);
1647
1648 /* In function.c  */
1649 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1650 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, bool);
1651 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1652 extern rtx assign_stack_temp_for_type (enum machine_mode,
1653                                        HOST_WIDE_INT, int, tree);
1654 extern rtx assign_temp (tree, int, int, int);
1655
1656 /* In emit-rtl.c */
1657 extern rtx emit_insn_before (rtx, rtx);
1658 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1659 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1660 extern rtx emit_jump_insn_before (rtx, rtx);
1661 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1662 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1663 extern rtx emit_call_insn_before (rtx, rtx);
1664 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1665 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1666 extern rtx emit_debug_insn_before (rtx, rtx);
1667 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1668 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1669 extern rtx emit_barrier_before (rtx);
1670 extern rtx emit_label_before (rtx, rtx);
1671 extern rtx emit_note_before (enum insn_note, rtx);
1672 extern rtx emit_insn_after (rtx, rtx);
1673 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1674 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1675 extern rtx emit_jump_insn_after (rtx, rtx);
1676 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1677 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1678 extern rtx emit_call_insn_after (rtx, rtx);
1679 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1680 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1681 extern rtx emit_debug_insn_after (rtx, rtx);
1682 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1683 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1684 extern rtx emit_barrier_after (rtx);
1685 extern rtx emit_label_after (rtx, rtx);
1686 extern rtx emit_note_after (enum insn_note, rtx);
1687 extern rtx emit_insn (rtx);
1688 extern rtx emit_debug_insn (rtx);
1689 extern rtx emit_jump_insn (rtx);
1690 extern rtx emit_call_insn (rtx);
1691 extern rtx emit_label (rtx);
1692 extern rtx emit_barrier (void);
1693 extern rtx emit_note (enum insn_note);
1694 extern rtx emit_note_copy (rtx);
1695 extern rtx gen_clobber (rtx);
1696 extern rtx emit_clobber (rtx);
1697 extern rtx gen_use (rtx);
1698 extern rtx emit_use (rtx);
1699 extern rtx make_insn_raw (rtx);
1700 extern rtx make_debug_insn_raw (rtx);
1701 extern rtx make_jump_insn_raw (rtx);
1702 extern void add_function_usage_to (rtx, rtx);
1703 extern rtx last_call_insn (void);
1704 extern rtx previous_insn (rtx);
1705 extern rtx next_insn (rtx);
1706 extern rtx prev_nonnote_insn (rtx);
1707 extern rtx prev_nonnote_insn_bb (rtx);
1708 extern rtx next_nonnote_insn (rtx);
1709 extern rtx next_nonnote_insn_bb (rtx);
1710 extern rtx prev_nondebug_insn (rtx);
1711 extern rtx next_nondebug_insn (rtx);
1712 extern rtx prev_nonnote_nondebug_insn (rtx);
1713 extern rtx next_nonnote_nondebug_insn (rtx);
1714 extern rtx prev_real_insn (rtx);
1715 extern rtx next_real_insn (rtx);
1716 extern rtx prev_active_insn (rtx);
1717 extern rtx next_active_insn (rtx);
1718 extern int active_insn_p (const_rtx);
1719 extern rtx prev_label (rtx);
1720 extern rtx next_label (rtx);
1721 extern rtx skip_consecutive_labels (rtx);
1722 extern rtx next_cc0_user (rtx);
1723 extern rtx prev_cc0_setter (rtx);
1724
1725 /* In cfglayout.c  */
1726 extern int insn_line (const_rtx);
1727 extern const char * insn_file (const_rtx);
1728 extern location_t locator_location (int);
1729 extern int locator_line (int);
1730 extern const char * locator_file (int);
1731 extern bool locator_eq (int, int);
1732 extern int prologue_locator, epilogue_locator;
1733
1734 /* In jump.c */
1735 extern enum rtx_code reverse_condition (enum rtx_code);
1736 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1737 extern enum rtx_code swap_condition (enum rtx_code);
1738 extern enum rtx_code unsigned_condition (enum rtx_code);
1739 extern enum rtx_code signed_condition (enum rtx_code);
1740 extern void mark_jump_label (rtx, rtx, int);
1741 extern unsigned int cleanup_barriers (void);
1742
1743 /* In jump.c */
1744 extern rtx delete_related_insns (rtx);
1745
1746 /* In recog.c  */
1747 extern rtx *find_constant_term_loc (rtx *);
1748
1749 /* In emit-rtl.c  */
1750 extern rtx try_split (rtx, rtx, int);
1751 extern int split_branch_probability;
1752
1753 /* In unknown file  */
1754 extern rtx split_insns (rtx, rtx);
1755
1756 /* In simplify-rtx.c  */
1757 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1758                                            rtx, enum machine_mode);
1759 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1760                                      enum machine_mode);
1761 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1762                                             rtx, rtx);
1763 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1764                                       rtx);
1765 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1766                                        enum machine_mode, rtx, rtx, rtx);
1767 extern rtx simplify_const_relational_operation (enum rtx_code,
1768                                                 enum machine_mode, rtx, rtx);
1769 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1770                                           enum machine_mode, rtx, rtx);
1771 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1772 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1773                                enum machine_mode);
1774 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1775                                  enum machine_mode, rtx, rtx, rtx);
1776 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1777                                     enum machine_mode, rtx, rtx);
1778 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1779                             unsigned int);
1780 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1781                                 unsigned int);
1782 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1783                                     rtx (*fn) (rtx, const_rtx, void *), void *);
1784 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1785 extern rtx simplify_rtx (const_rtx);
1786 extern rtx avoid_constant_pool_reference (rtx);
1787 extern rtx delegitimize_mem_from_attrs (rtx);
1788 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1789
1790 /* In reginfo.c  */
1791 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1792                                                bool);
1793
1794 /* In emit-rtl.c  */
1795 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1796 extern void set_insn_deleted (rtx);
1797
1798 /* Functions in rtlanal.c */
1799
1800 /* Single set is implemented as macro for performance reasons.  */
1801 #define single_set(I) (INSN_P (I) \
1802                        ? (GET_CODE (PATTERN (I)) == SET \
1803                           ? PATTERN (I) : single_set_1 (I)) \
1804                        : NULL_RTX)
1805 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1806
1807 /* Structure used for passing data to REPLACE_LABEL.  */
1808 typedef struct replace_label_data
1809 {
1810   rtx r1;
1811   rtx r2;
1812   bool update_label_nuses;
1813 } replace_label_data;
1814
1815 extern int rtx_addr_can_trap_p (const_rtx);
1816 extern bool nonzero_address_p (const_rtx);
1817 extern int rtx_unstable_p (const_rtx);
1818 extern bool rtx_varies_p (const_rtx, bool);
1819 extern bool rtx_addr_varies_p (const_rtx, bool);
1820 extern HOST_WIDE_INT get_integer_term (const_rtx);
1821 extern rtx get_related_value (const_rtx);
1822 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1823 extern void split_const (rtx, rtx *, rtx *);
1824 extern int reg_mentioned_p (const_rtx, const_rtx);
1825 extern int count_occurrences (const_rtx, const_rtx, int);
1826 extern int reg_referenced_p (const_rtx, const_rtx);
1827 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1828 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1829 extern int commutative_operand_precedence (rtx);
1830 extern bool swap_commutative_operands_p (rtx, rtx);
1831 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1832 extern int no_labels_between_p (const_rtx, const_rtx);
1833 extern int modified_in_p (const_rtx, const_rtx);
1834 extern int reg_set_p (const_rtx, const_rtx);
1835 extern rtx single_set_2 (const_rtx, const_rtx);
1836 extern int multiple_sets (const_rtx);
1837 extern int set_noop_p (const_rtx);
1838 extern int noop_move_p (const_rtx);
1839 extern rtx find_last_value (rtx, rtx *, rtx, int);
1840 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1841 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1842 extern const_rtx set_of (const_rtx, const_rtx);
1843 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1844 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1845 extern int dead_or_set_p (const_rtx, const_rtx);
1846 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1847 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1848 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1849 extern rtx find_reg_equal_equiv_note (const_rtx);
1850 extern rtx find_constant_src (const_rtx);
1851 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1852 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1853 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1854 extern void add_reg_note (rtx, enum reg_note, rtx);
1855 extern void remove_note (rtx, const_rtx);
1856 extern void remove_reg_equal_equiv_notes (rtx);
1857 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
1858 extern int side_effects_p (const_rtx);
1859 extern int volatile_refs_p (const_rtx);
1860 extern int volatile_insn_p (const_rtx);
1861 extern int may_trap_p_1 (const_rtx, unsigned);
1862 extern int may_trap_p (const_rtx);
1863 extern int may_trap_or_fault_p (const_rtx);
1864 extern bool can_throw_internal (const_rtx);
1865 extern bool can_throw_external (const_rtx);
1866 extern bool insn_could_throw_p (const_rtx);
1867 extern bool insn_nothrow_p (const_rtx);
1868 extern bool can_nonlocal_goto (const_rtx);
1869 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1870 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1871 extern int inequality_comparisons_p (const_rtx);
1872 extern rtx replace_rtx (rtx, rtx, rtx);
1873 extern int replace_label (rtx *, void *);
1874 extern int rtx_referenced_p (rtx, rtx);
1875 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1876 extern int computed_jump_p (const_rtx);
1877
1878 typedef int (*rtx_function) (rtx *, void *);
1879 extern int for_each_rtx (rtx *, rtx_function, void *);
1880
1881 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1882                                               rtx *, rtx *);
1883 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1884                            rtx_equal_p_callback_function);
1885
1886 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1887                                            enum machine_mode *);
1888 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1889                              bool, hash_rtx_callback_function);
1890
1891 extern rtx regno_use_in (unsigned int, rtx);
1892 extern int auto_inc_p (const_rtx);
1893 extern int in_expr_list_p (const_rtx, const_rtx);
1894 extern void remove_node_from_expr_list (const_rtx, rtx *);
1895 extern int loc_mentioned_in_p (rtx *, const_rtx);
1896 extern rtx find_first_parameter_load (rtx, rtx);
1897 extern bool keep_with_call_p (const_rtx);
1898 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1899 extern int insn_rtx_cost (rtx, bool);
1900
1901 /* Given an insn and condition, return a canonical description of
1902    the test being made.  */
1903 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1904
1905 /* Given a JUMP_INSN, return a canonical description of the test
1906    being made.  */
1907 extern rtx get_condition (rtx, rtx *, int, int);
1908
1909 /* Information about a subreg of a hard register.  */
1910 struct subreg_info
1911 {
1912   /* Offset of first hard register involved in the subreg.  */
1913   int offset;
1914   /* Number of hard registers involved in the subreg.  */
1915   int nregs;
1916   /* Whether this subreg can be represented as a hard reg with the new
1917      mode.  */
1918   bool representable_p;
1919 };
1920
1921 extern void subreg_get_info (unsigned int, enum machine_mode,
1922                              unsigned int, enum machine_mode,
1923                              struct subreg_info *);
1924
1925 /* lists.c */
1926
1927 extern void free_EXPR_LIST_list         (rtx *);
1928 extern void free_INSN_LIST_list         (rtx *);
1929 extern void free_EXPR_LIST_node         (rtx);
1930 extern void free_INSN_LIST_node         (rtx);
1931 extern rtx alloc_INSN_LIST                      (rtx, rtx);
1932 extern rtx alloc_EXPR_LIST                      (int, rtx, rtx);
1933 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1934 extern rtx remove_list_elem (rtx, rtx *);
1935 extern rtx remove_free_INSN_LIST_node (rtx *);
1936 extern rtx remove_free_EXPR_LIST_node (rtx *);
1937
1938
1939 /* reginfo.c */
1940
1941 /* Initialize may_move_cost and friends for mode M.  */
1942 extern void init_move_cost (enum machine_mode);
1943 /* Resize reg info.  */
1944 extern bool resize_reg_info (void);
1945 /* Free up register info memory.  */
1946 extern void free_reg_info (void);
1947 extern void init_subregs_of_mode (void);
1948 extern void finish_subregs_of_mode (void);
1949
1950 /* recog.c */
1951 extern rtx extract_asm_operands (rtx);
1952 extern int asm_noperands (const_rtx);
1953 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
1954                                         enum machine_mode *, location_t *);
1955
1956 extern enum reg_class reg_preferred_class (int);
1957 extern enum reg_class reg_alternate_class (int);
1958 extern enum reg_class reg_cover_class (int);
1959 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
1960                                enum reg_class);
1961
1962 extern void split_all_insns (void);
1963 extern unsigned int split_all_insns_noflow (void);
1964
1965 #define MAX_SAVED_CONST_INT 64
1966 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
1967
1968 #define const0_rtx      (const_int_rtx[MAX_SAVED_CONST_INT])
1969 #define const1_rtx      (const_int_rtx[MAX_SAVED_CONST_INT+1])
1970 #define const2_rtx      (const_int_rtx[MAX_SAVED_CONST_INT+2])
1971 #define constm1_rtx     (const_int_rtx[MAX_SAVED_CONST_INT-1])
1972 extern GTY(()) rtx const_true_rtx;
1973
1974 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
1975
1976 /* Returns a constant 0 rtx in mode MODE.  Integer modes are treated the
1977    same as VOIDmode.  */
1978
1979 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
1980
1981 /* Likewise, for the constants 1 and 2.  */
1982
1983 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
1984 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
1985
1986 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
1987    is used to represent the frame pointer.  This is because the
1988    hard frame pointer and the automatic variables are separated by an amount
1989    that cannot be determined until after register allocation.  We can assume
1990    that in this case ELIMINABLE_REGS will be defined, one action of which
1991    will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM.  */
1992 #ifndef HARD_FRAME_POINTER_REGNUM
1993 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
1994 #endif
1995
1996 /* Index labels for global_rtl.  */
1997 enum global_rtl_index
1998 {
1999   GR_PC,
2000   GR_CC0,
2001   GR_STACK_POINTER,
2002   GR_FRAME_POINTER,
2003 /* For register elimination to work properly these hard_frame_pointer_rtx,
2004    frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2005    the same register.  */
2006 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2007   GR_ARG_POINTER = GR_FRAME_POINTER,
2008 #endif
2009 #if HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM
2010   GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2011 #else
2012   GR_HARD_FRAME_POINTER,
2013 #endif
2014 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2015 #if HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2016   GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2017 #else
2018   GR_ARG_POINTER,
2019 #endif
2020 #endif
2021   GR_VIRTUAL_INCOMING_ARGS,
2022   GR_VIRTUAL_STACK_ARGS,
2023   GR_VIRTUAL_STACK_DYNAMIC,
2024   GR_VIRTUAL_OUTGOING_ARGS,
2025   GR_VIRTUAL_CFA,
2026
2027   GR_MAX
2028 };
2029
2030 /* Pointers to standard pieces of rtx are stored here.  */
2031 extern GTY(()) rtx global_rtl[GR_MAX];
2032
2033 /* Standard pieces of rtx, to be substituted directly into things.  */
2034 #define pc_rtx                  (global_rtl[GR_PC])
2035 #define cc0_rtx                 (global_rtl[GR_CC0])
2036
2037 /* All references to certain hard regs, except those created
2038    by allocating pseudo regs into them (when that's possible),
2039    go through these unique rtx objects.  */
2040 #define stack_pointer_rtx       (global_rtl[GR_STACK_POINTER])
2041 #define frame_pointer_rtx       (global_rtl[GR_FRAME_POINTER])
2042 #define hard_frame_pointer_rtx  (global_rtl[GR_HARD_FRAME_POINTER])
2043 #define arg_pointer_rtx         (global_rtl[GR_ARG_POINTER])
2044
2045 extern GTY(()) rtx pic_offset_table_rtx;
2046 extern GTY(()) rtx return_address_pointer_rtx;
2047
2048 /* Include the RTL generation functions.  */
2049
2050 #ifndef GENERATOR_FILE
2051 #include "genrtl.h"
2052 #undef gen_rtx_ASM_INPUT
2053 #define gen_rtx_ASM_INPUT(MODE, ARG0)                           \
2054   gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2055 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC)                  \
2056   gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2057 #endif
2058
2059 /* There are some RTL codes that require special attention; the
2060    generation functions included above do the raw handling.  If you
2061    add to this list, modify special_rtx in gengenrtl.c as well.  */
2062
2063 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2064 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2065 extern rtx gen_raw_REG (enum machine_mode, int);
2066 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2067 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2068 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2069
2070 #define GEN_INT(N)  gen_rtx_CONST_INT (VOIDmode, (N))
2071
2072 /* Virtual registers are used during RTL generation to refer to locations into
2073    the stack frame when the actual location isn't known until RTL generation
2074    is complete.  The routine instantiate_virtual_regs replaces these with
2075    the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2076    a constant.  */
2077
2078 #define FIRST_VIRTUAL_REGISTER  (FIRST_PSEUDO_REGISTER)
2079
2080 /* This points to the first word of the incoming arguments passed on the stack,
2081    either by the caller or by the callee when pretending it was passed by the
2082    caller.  */
2083
2084 #define virtual_incoming_args_rtx       (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2085
2086 #define VIRTUAL_INCOMING_ARGS_REGNUM    (FIRST_VIRTUAL_REGISTER)
2087
2088 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2089    variable on the stack.  Otherwise, it points to the first variable on
2090    the stack.  */
2091
2092 #define virtual_stack_vars_rtx          (global_rtl[GR_VIRTUAL_STACK_ARGS])
2093
2094 #define VIRTUAL_STACK_VARS_REGNUM       ((FIRST_VIRTUAL_REGISTER) + 1)
2095
2096 /* This points to the location of dynamically-allocated memory on the stack
2097    immediately after the stack pointer has been adjusted by the amount
2098    desired.  */
2099
2100 #define virtual_stack_dynamic_rtx       (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2101
2102 #define VIRTUAL_STACK_DYNAMIC_REGNUM    ((FIRST_VIRTUAL_REGISTER) + 2)
2103
2104 /* This points to the location in the stack at which outgoing arguments should
2105    be written when the stack is pre-pushed (arguments pushed using push
2106    insns always use sp).  */
2107
2108 #define virtual_outgoing_args_rtx       (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2109
2110 #define VIRTUAL_OUTGOING_ARGS_REGNUM    ((FIRST_VIRTUAL_REGISTER) + 3)
2111
2112 /* This points to the Canonical Frame Address of the function.  This
2113    should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2114    but is calculated relative to the arg pointer for simplicity; the
2115    frame pointer nor stack pointer are necessarily fixed relative to
2116    the CFA until after reload.  */
2117
2118 #define virtual_cfa_rtx                 (global_rtl[GR_VIRTUAL_CFA])
2119
2120 #define VIRTUAL_CFA_REGNUM              ((FIRST_VIRTUAL_REGISTER) + 4)
2121
2122 #define LAST_VIRTUAL_REGISTER           ((FIRST_VIRTUAL_REGISTER) + 4)
2123
2124 /* Nonzero if REGNUM is a pointer into the stack frame.  */
2125 #define REGNO_PTR_FRAME_P(REGNUM)               \
2126   ((REGNUM) == STACK_POINTER_REGNUM             \
2127    || (REGNUM) == FRAME_POINTER_REGNUM          \
2128    || (REGNUM) == HARD_FRAME_POINTER_REGNUM     \
2129    || (REGNUM) == ARG_POINTER_REGNUM            \
2130    || ((REGNUM) >= FIRST_VIRTUAL_REGISTER       \
2131        && (REGNUM) <= LAST_VIRTUAL_REGISTER))
2132
2133 /* REGNUM never really appearing in the INSN stream.  */
2134 #define INVALID_REGNUM                  (~(unsigned int) 0)
2135
2136 extern rtx output_constant_def (tree, int);
2137 extern rtx lookup_constant_def (tree);
2138
2139 /* Nonzero after end of reload pass.
2140    Set to 1 or 0 by reload1.c.  */
2141
2142 extern int reload_completed;
2143
2144 /* Nonzero after thread_prologue_and_epilogue_insns has run.  */
2145 extern int epilogue_completed;
2146
2147 /* Set to 1 while reload_as_needed is operating.
2148    Required by some machines to handle any generated moves differently.  */
2149
2150 extern int reload_in_progress;
2151
2152 /* This macro indicates whether you may create a new
2153    pseudo-register.  */
2154
2155 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2156
2157 #ifdef STACK_REGS
2158 /* Nonzero after end of regstack pass.
2159    Set to 1 or 0 by reg-stack.c.  */
2160 extern int regstack_completed;
2161 #endif
2162
2163 /* If this is nonzero, we do not bother generating VOLATILE
2164    around volatile memory references, and we are willing to
2165    output indirect addresses.  If cse is to follow, we reject
2166    indirect addresses so a useful potential cse is generated;
2167    if it is used only once, instruction combination will produce
2168    the same indirect address eventually.  */
2169 extern int cse_not_expected;
2170
2171 /* Translates rtx code to tree code, for those codes needed by
2172    REAL_ARITHMETIC.  The function returns an int because the caller may not
2173    know what `enum tree_code' means.  */
2174
2175 extern int rtx_to_tree_code (enum rtx_code);
2176
2177 /* In cse.c */
2178 extern int delete_trivially_dead_insns (rtx, int);
2179 extern int cse_main (rtx, int);
2180 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2181 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2182
2183 /* In jump.c */
2184 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2185 extern int condjump_p (const_rtx);
2186 extern int any_condjump_p (const_rtx);
2187 extern int any_uncondjump_p (const_rtx);
2188 extern rtx pc_set (const_rtx);
2189 extern rtx condjump_label (const_rtx);
2190 extern int simplejump_p (const_rtx);
2191 extern int returnjump_p (rtx);
2192 extern int eh_returnjump_p (rtx);
2193 extern int onlyjump_p (const_rtx);
2194 extern int only_sets_cc0_p (const_rtx);
2195 extern int sets_cc0_p (const_rtx);
2196 extern int invert_jump_1 (rtx, rtx);
2197 extern int invert_jump (rtx, rtx, int);
2198 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2199 extern int true_regnum (const_rtx);
2200 extern unsigned int reg_or_subregno (const_rtx);
2201 extern int redirect_jump_1 (rtx, rtx);
2202 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2203 extern int redirect_jump (rtx, rtx, int);
2204 extern void rebuild_jump_labels (rtx);
2205 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2206 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2207 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2208                                                      const_rtx, const_rtx);
2209 extern void delete_for_peephole (rtx, rtx);
2210 extern int condjump_in_parallel_p (const_rtx);
2211
2212 /* In emit-rtl.c.  */
2213 extern int max_reg_num (void);
2214 extern int max_label_num (void);
2215 extern int get_first_label_num (void);
2216 extern void maybe_set_first_label_num (rtx);
2217 extern void delete_insns_since (rtx);
2218 extern void mark_reg_pointer (rtx, int);
2219 extern void mark_user_reg (rtx);
2220 extern void reset_used_flags (rtx);
2221 extern void set_used_flags (rtx);
2222 extern void reorder_insns (rtx, rtx, rtx);
2223 extern void reorder_insns_nobb (rtx, rtx, rtx);
2224 extern int get_max_uid (void);
2225 extern int get_max_insn_count (void);
2226 extern int in_sequence_p (void);
2227 extern void force_next_line_note (void);
2228 extern void init_emit (void);
2229 extern void init_emit_regs (void);
2230 extern void init_emit_once (void);
2231 extern void push_topmost_sequence (void);
2232 extern void pop_topmost_sequence (void);
2233 extern void set_new_first_and_last_insn (rtx, rtx);
2234 extern unsigned int unshare_all_rtl (void);
2235 extern void unshare_all_rtl_again (rtx);
2236 extern void unshare_all_rtl_in_chain (rtx);
2237 extern void verify_rtl_sharing (void);
2238 extern void set_first_insn (rtx);
2239 extern void set_last_insn (rtx);
2240 extern void link_cc0_insns (rtx);
2241 extern void add_insn (rtx);
2242 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2243 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2244 extern void remove_insn (rtx);
2245 extern rtx emit (rtx);
2246 extern rtx delete_insn (rtx);
2247 extern rtx entry_of_function (void);
2248 extern void emit_insn_at_entry (rtx);
2249 extern void delete_insn_chain (rtx, rtx, bool);
2250 extern rtx unlink_insn_chain (rtx, rtx);
2251 extern rtx delete_insn_and_edges (rtx);
2252 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2253 extern rtx gen_const_mem (enum machine_mode, rtx);
2254 extern rtx gen_frame_mem (enum machine_mode, rtx);
2255 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2256 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2257                              const_rtx, unsigned int);
2258
2259 /* In combine.c  */
2260 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2261 extern rtx remove_death (unsigned int, rtx);
2262 extern void dump_combine_stats (FILE *);
2263 extern void dump_combine_total_stats (FILE *);
2264
2265 /* In cfgcleanup.c  */
2266 extern void delete_dead_jumptables (void);
2267
2268 /* In sched-vis.c.  */
2269 extern void debug_bb_n_slim (int);
2270 extern void debug_bb_slim (struct basic_block_def *);
2271 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2272 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2273 extern void dump_insn_slim (FILE *f, rtx x);
2274 extern void debug_insn_slim (rtx x);
2275
2276 /* In sched-rgn.c.  */
2277 extern void schedule_insns (void);
2278
2279 /* In sched-ebb.c.  */
2280 extern void schedule_ebbs (void);
2281
2282 /* In haifa-sched.c.  */
2283 extern void fix_sched_param (const char *, const char *);
2284
2285 /* In sel-sched-dump.c.  */
2286 extern void sel_sched_fix_param (const char *param, const char *val);
2287
2288 /* In print-rtl.c */
2289 extern const char *print_rtx_head;
2290 extern void debug_rtx (const_rtx);
2291 extern void debug_rtx_list (const_rtx, int);
2292 extern void debug_rtx_range (const_rtx, const_rtx);
2293 extern const_rtx debug_rtx_find (const_rtx, int);
2294 extern void print_mem_expr (FILE *, const_tree);
2295 extern void print_rtl (FILE *, const_rtx);
2296 extern void print_simple_rtl (FILE *, const_rtx);
2297 extern int print_rtl_single (FILE *, const_rtx);
2298 extern void print_inline_rtx (FILE *, const_rtx, int);
2299
2300 /* In function.c */
2301 extern void reposition_prologue_and_epilogue_notes (void);
2302 extern int prologue_epilogue_contains (const_rtx);
2303 extern int sibcall_epilogue_contains (const_rtx);
2304 extern void mark_temp_addr_taken (rtx);
2305 extern void update_temp_slot_address (rtx, rtx);
2306 extern void maybe_copy_epilogue_insn (rtx, rtx);
2307
2308 /* In stmt.c */
2309 extern void expand_null_return (void);
2310 extern void expand_naked_return (void);
2311 extern void emit_jump (rtx);
2312
2313 /* In expr.c */
2314 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2315                            unsigned int, int);
2316
2317 /* In cfgrtl.c */
2318 extern void print_rtl_with_bb (FILE *, const_rtx);
2319
2320 /* In cfg.c.  */
2321 extern void dump_reg_info (FILE *);
2322 extern void dump_flow_info (FILE *, int);
2323
2324 /* In expmed.c */
2325 extern void init_expmed (void);
2326 extern void expand_inc (rtx, rtx);
2327 extern void expand_dec (rtx, rtx);
2328
2329 /* In gcse.c */
2330 extern bool can_copy_p (enum machine_mode);
2331 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2332 extern rtx fis_get_condition (rtx);
2333
2334 /* In ira.c */
2335 #ifdef HARD_CONST
2336 extern HARD_REG_SET eliminable_regset;
2337 #endif
2338 extern void mark_elimination (int, int);
2339
2340 /* In reginfo.c */
2341 extern int reg_classes_intersect_p (enum reg_class, enum reg_class);
2342 extern int reg_class_subset_p (enum reg_class, enum reg_class);
2343 extern void globalize_reg (int);
2344 extern void init_reg_modes_target (void);
2345 extern void init_regs (void);
2346 extern void reinit_regs (void);
2347 extern void init_fake_stack_mems (void);
2348 extern void save_register_info (void);
2349 extern void init_reg_sets (void);
2350 extern void regclass (rtx, int);
2351 extern void reg_scan (rtx, unsigned int);
2352 extern void fix_register (const char *, int, int);
2353 extern bool invalid_mode_change_p (unsigned int, enum reg_class,
2354                                    enum machine_mode);
2355
2356 /* In reorg.c */
2357 extern void dbr_schedule (rtx);
2358
2359 /* In reload1.c */
2360 extern int function_invariant_p (const_rtx);
2361
2362 /* In calls.c */
2363 enum libcall_type
2364 {
2365   LCT_NORMAL = 0,
2366   LCT_CONST = 1,
2367   LCT_PURE = 2,
2368   LCT_NORETURN = 3,
2369   LCT_THROW = 4,
2370   LCT_RETURNS_TWICE = 5
2371 };
2372
2373 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2374                                ...);
2375 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2376                                     enum machine_mode, int, ...);
2377
2378 /* In varasm.c */
2379 extern void init_varasm_once (void);
2380 extern enum tls_model decl_default_tls_model (const_tree);
2381
2382 /* In rtl.c */
2383 extern void traverse_md_constants (int (*) (void **, void *), void *);
2384 struct md_constant { char *name, *value; };
2385
2386 /* In read-rtl.c */
2387 extern int read_skip_spaces (FILE *);
2388 extern bool read_rtx (FILE *, rtx *, int *);
2389 extern void copy_rtx_ptr_loc (const void *, const void *);
2390 extern void print_rtx_ptr_loc (const void *);
2391 extern const char *join_c_conditions (const char *, const char *);
2392 extern void print_c_condition (const char *);
2393 extern const char *read_rtx_filename;
2394 extern int read_rtx_lineno;
2395
2396 /* In alias.c */
2397 extern rtx canon_rtx (rtx);
2398 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2399 extern rtx get_addr (rtx);
2400 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2401                                   rtx, bool (*)(const_rtx, bool));
2402 extern int read_dependence (const_rtx, const_rtx);
2403 extern int anti_dependence (const_rtx, const_rtx);
2404 extern int output_dependence (const_rtx, const_rtx);
2405 extern void init_alias_target (void);
2406 extern void init_alias_analysis (void);
2407 extern void end_alias_analysis (void);
2408 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2409 extern rtx find_base_term (rtx);
2410 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2411 extern rtx get_reg_known_value (unsigned int);
2412 extern bool get_reg_known_equiv_p (unsigned int);
2413 extern rtx get_reg_base_value (unsigned int);
2414
2415 #ifdef STACK_REGS
2416 extern int stack_regs_mentioned (const_rtx insn);
2417 #endif
2418
2419 /* In toplev.c */
2420 extern GTY(()) rtx stack_limit_rtx;
2421
2422 /* In predict.c */
2423 extern void invert_br_probabilities (rtx);
2424 extern bool expensive_function_p (int);
2425
2426 /* In var-tracking.c */
2427 extern unsigned int variable_tracking_main (void);
2428
2429 /* In stor-layout.c.  */
2430 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2431                              rtx *, rtx *);
2432
2433 /* In loop-unswitch.c  */
2434 extern rtx reversed_condition (rtx);
2435 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2436
2437 /* In loop-iv.c  */
2438 extern rtx canon_condition (rtx);
2439 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2440
2441 /* In final.c  */
2442 extern unsigned int compute_alignments (void);
2443 extern int asm_str_count (const char *templ);
2444 \f
2445 struct rtl_hooks
2446 {
2447   rtx (*gen_lowpart) (enum machine_mode, rtx);
2448   rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2449   rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2450                            unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2451   rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2452                                   unsigned int, unsigned int *);
2453   bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2454
2455   /* Whenever you add entries here, make sure you adjust rtlhooks-def.h.  */
2456 };
2457
2458 /* Each pass can provide its own.  */
2459 extern struct rtl_hooks rtl_hooks;
2460
2461 /* ... but then it has to restore these.  */
2462 extern const struct rtl_hooks general_rtl_hooks;
2463
2464 /* Keep this for the nonce.  */
2465 #define gen_lowpart rtl_hooks.gen_lowpart
2466
2467 extern void insn_locators_alloc (void);
2468 extern void insn_locators_free (void);
2469 extern void insn_locators_finalize (void);
2470 extern void set_curr_insn_source_location (location_t);
2471 extern location_t get_curr_insn_source_location (void);
2472 extern void set_curr_insn_block (tree);
2473 extern tree get_curr_insn_block (void);
2474 extern int curr_insn_locator (void);
2475 extern bool optimize_insn_for_size_p (void);
2476 extern bool optimize_insn_for_speed_p (void);
2477
2478 #endif /* ! GCC_RTL_H */