gcc/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, 2011
   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 "vecir.h"
  31 #include "fixed-value.h"
  32 #include "alias.h"
  33 #include "hashtab.h"
  34
  35 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
  36 #undef FLOAT /* Likewise.  */
  37 #undef ABS /* Likewise.  */
  38 #undef PC /* Likewise.  */
  39
  40 /* Value used by some passes to "recognize" noop moves as valid
  41  instructions.  */
  42 #define NOOP_MOVE_INSN_CODE     INT_MAX
  43
  44 /* Register Transfer Language EXPRESSIONS CODES */
  45
  46 #define RTX_CODE        enum rtx_code
  47 enum rtx_code  {
  48
  49 #define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS)   ENUM ,
  50 #include "rtl.def"              /* rtl expressions are documented here */
  51 #undef DEF_RTL_EXPR
  52
  53   LAST_AND_UNUSED_RTX_CODE};    /* A convenient way to get a value for
  54                                    NUM_RTX_CODE.
  55                                    Assumes default enum value assignment.  */
  56
  57 #define NUM_RTX_CODE ((int) LAST_AND_UNUSED_RTX_CODE)
  58                                 /* The cast here, saves many elsewhere.  */
  59
  60 /* Register Transfer Language EXPRESSIONS CODE CLASSES */
  61
  62 enum rtx_class  {
  63   /* We check bit 0-1 of some rtx class codes in the predicates below.  */
  64
  65   /* Bit 0 = comparison if 0, arithmetic is 1
  66      Bit 1 = 1 if commutative.  */
  67   RTX_COMPARE,          /* 0 */
  68   RTX_COMM_COMPARE,
  69   RTX_BIN_ARITH,
  70   RTX_COMM_ARITH,
  71
  72   /* Must follow the four preceding values.  */
  73   RTX_UNARY,            /* 4 */
  74
  75   RTX_EXTRA,
  76   RTX_MATCH,
  77   RTX_INSN,
  78
  79   /* Bit 0 = 1 if constant.  */
  80   RTX_OBJ,              /* 8 */
  81   RTX_CONST_OBJ,
  82
  83   RTX_TERNARY,
  84   RTX_BITFIELD_OPS,
  85   RTX_AUTOINC
  86 };
  87
  88 #define RTX_OBJ_MASK (~1)
  89 #define RTX_OBJ_RESULT (RTX_OBJ & RTX_OBJ_MASK)
  90 #define RTX_COMPARE_MASK (~1)
  91 #define RTX_COMPARE_RESULT (RTX_COMPARE & RTX_COMPARE_MASK)
  92 #define RTX_ARITHMETIC_MASK (~1)
  93 #define RTX_ARITHMETIC_RESULT (RTX_COMM_ARITH & RTX_ARITHMETIC_MASK)
  94 #define RTX_BINARY_MASK (~3)
  95 #define RTX_BINARY_RESULT (RTX_COMPARE & RTX_BINARY_MASK)
  96 #define RTX_COMMUTATIVE_MASK (~2)
  97 #define RTX_COMMUTATIVE_RESULT (RTX_COMM_COMPARE & RTX_COMMUTATIVE_MASK)
  98 #define RTX_NON_COMMUTATIVE_RESULT (RTX_COMPARE & RTX_COMMUTATIVE_MASK)
  99
 100 extern const unsigned char rtx_length[NUM_RTX_CODE];
 101 #define GET_RTX_LENGTH(CODE)            (rtx_length[(int) (CODE)])
 102
 103 extern const char * const rtx_name[NUM_RTX_CODE];
 104 #define GET_RTX_NAME(CODE)              (rtx_name[(int) (CODE)])
 105
 106 extern const char * const rtx_format[NUM_RTX_CODE];
 107 #define GET_RTX_FORMAT(CODE)            (rtx_format[(int) (CODE)])
 108
 109 extern const enum rtx_class rtx_class[NUM_RTX_CODE];
 110 #define GET_RTX_CLASS(CODE)             (rtx_class[(int) (CODE)])
 111
 112 extern const unsigned char rtx_code_size[NUM_RTX_CODE];
 113 extern const unsigned char rtx_next[NUM_RTX_CODE];
 114 \f
 115 /* The flags and bitfields of an ADDR_DIFF_VEC.  BASE is the base label
 116    relative to which the offsets are calculated, as explained in rtl.def.  */
 117 typedef struct
 118 {
 119   /* Set at the start of shorten_branches - ONLY WHEN OPTIMIZING - : */
 120   unsigned min_align: 8;
 121   /* Flags: */
 122   unsigned base_after_vec: 1; /* BASE is after the ADDR_DIFF_VEC.  */
 123   unsigned min_after_vec: 1;  /* minimum address target label is
 124                                  after the ADDR_DIFF_VEC.  */
 125   unsigned max_after_vec: 1;  /* maximum address target label is
 126                                  after the ADDR_DIFF_VEC.  */
 127   unsigned min_after_base: 1; /* minimum address target label is
 128                                  after BASE.  */
 129   unsigned max_after_base: 1; /* maximum address target label is
 130                                  after BASE.  */
 131   /* Set by the actual branch shortening process - ONLY WHEN OPTIMIZING - : */
 132   unsigned offset_unsigned: 1; /* offsets have to be treated as unsigned.  */
 133   unsigned : 2;
 134   unsigned scale : 8;
 135 } addr_diff_vec_flags;
 136
 137 /* Structure used to describe the attributes of a MEM.  These are hashed
 138    so MEMs that the same attributes share a data structure.  This means
 139    they cannot be modified in place.  */
 140 typedef struct GTY(()) mem_attrs
 141 {
 142   /* The expression that the MEM accesses, or null if not known.
 143      This expression might be larger than the memory reference itself.
 144      (In other words, the MEM might access only part of the object.)  */
 145   tree expr;
 146
 147   /* The offset of the memory reference from the start of EXPR.
 148      Only valid if OFFSET_KNOWN_P.  */
 149   HOST_WIDE_INT offset;
 150
 151   /* The size of the memory reference in bytes.  Only valid if
 152      SIZE_KNOWN_P.  */
 153   HOST_WIDE_INT size;
 154
 155   /* The alias set of the memory reference.  */
 156   alias_set_type alias;
 157
 158   /* The alignment of the reference in bits.  Always a multiple of
 159      BITS_PER_UNIT.  Note that EXPR may have a stricter alignment
 160      than the memory reference itself.  */
 161   unsigned int align;
 162
 163   /* The address space that the memory reference uses.  */
 164   unsigned char addrspace;
 165
 166   /* True if OFFSET is known.  */
 167   bool offset_known_p;
 168
 169   /* True if SIZE is known.  */
 170   bool size_known_p;
 171 } mem_attrs;
 172
 173 /* Structure used to describe the attributes of a REG in similar way as
 174    mem_attrs does for MEM above.  Note that the OFFSET field is calculated
 175    in the same way as for mem_attrs, rather than in the same way as a
 176    SUBREG_BYTE.  For example, if a big-endian target stores a byte
 177    object in the low part of a 4-byte register, the OFFSET field
 178    will be -3 rather than 0.  */
 179
 180 typedef struct GTY(()) reg_attrs {
 181   tree decl;                    /* decl corresponding to REG.  */
 182   HOST_WIDE_INT offset;         /* Offset from start of DECL.  */
 183 } reg_attrs;
 184
 185 /* Common union for an element of an rtx.  */
 186
 187 union rtunion_def
 188 {
 189   int rt_int;
 190   unsigned int rt_uint;
 191   const char *rt_str;
 192   rtx rt_rtx;
 193   rtvec rt_rtvec;
 194   enum machine_mode rt_type;
 195   addr_diff_vec_flags rt_addr_diff_vec_flags;
 196   struct cselib_val_struct *rt_cselib;
 197   tree rt_tree;
 198   struct basic_block_def *rt_bb;
 199   mem_attrs *rt_mem;
 200   reg_attrs *rt_reg;
 201   struct constant_descriptor_rtx *rt_constant;
 202   struct dw_cfi_struct *rt_cfi;
 203 };
 204 typedef union rtunion_def rtunion;
 205
 206 /* This structure remembers the position of a SYMBOL_REF within an
 207    object_block structure.  A SYMBOL_REF only provides this information
 208    if SYMBOL_REF_HAS_BLOCK_INFO_P is true.  */
 209 struct GTY(()) block_symbol {
 210   /* The usual SYMBOL_REF fields.  */
 211   rtunion GTY ((skip)) fld[3];
 212
 213   /* The block that contains this object.  */
 214   struct object_block *block;
 215
 216   /* The offset of this object from the start of its block.  It is negative
 217      if the symbol has not yet been assigned an offset.  */
 218   HOST_WIDE_INT offset;
 219 };
 220
 221 /* Describes a group of objects that are to be placed together in such
 222    a way that their relative positions are known.  */
 223 struct GTY(()) object_block {
 224   /* The section in which these objects should be placed.  */
 225   section *sect;
 226
 227   /* The alignment of the first object, measured in bits.  */
 228   unsigned int alignment;
 229
 230   /* The total size of the objects, measured in bytes.  */
 231   HOST_WIDE_INT size;
 232
 233   /* The SYMBOL_REFs for each object.  The vector is sorted in
 234      order of increasing offset and the following conditions will
 235      hold for each element X:
 236
 237          SYMBOL_REF_HAS_BLOCK_INFO_P (X)
 238          !SYMBOL_REF_ANCHOR_P (X)
 239          SYMBOL_REF_BLOCK (X) == [address of this structure]
 240          SYMBOL_REF_BLOCK_OFFSET (X) >= 0.  */
 241   VEC(rtx,gc) *objects;
 242
 243   /* All the anchor SYMBOL_REFs used to address these objects, sorted
 244      in order of increasing offset, and then increasing TLS model.
 245      The following conditions will hold for each element X in this vector:
 246
 247          SYMBOL_REF_HAS_BLOCK_INFO_P (X)
 248          SYMBOL_REF_ANCHOR_P (X)
 249          SYMBOL_REF_BLOCK (X) == [address of this structure]
 250          SYMBOL_REF_BLOCK_OFFSET (X) >= 0.  */
 251   VEC(rtx,gc) *anchors;
 252 };
 253
 254 /* RTL expression ("rtx").  */
 255
 256 struct GTY((chain_next ("RTX_NEXT (&%h)"),
 257             chain_prev ("RTX_PREV (&%h)"), variable_size)) rtx_def {
 258   /* The kind of expression this is.  */
 259   ENUM_BITFIELD(rtx_code) code: 16;
 260
 261   /* The kind of value the expression has.  */
 262   ENUM_BITFIELD(machine_mode) mode : 8;
 263
 264   /* 1 in a MEM if we should keep the alias set for this mem unchanged
 265      when we access a component.
 266      1 in a CALL_INSN if it is a sibling call.
 267      1 in a SET that is for a return.
 268      In a CODE_LABEL, part of the two-bit alternate entry field.  */
 269   unsigned int jump : 1;
 270   /* In a CODE_LABEL, part of the two-bit alternate entry field.
 271      1 in a MEM if it cannot trap.
 272      1 in a CALL_INSN logically equivalent to
 273        ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P. */
 274   unsigned int call : 1;
 275   /* 1 in a REG, MEM, or CONCAT if the value is set at most once, anywhere.
 276      1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
 277      1 in a SYMBOL_REF if it addresses something in the per-function
 278      constants pool.
 279      1 in a CALL_INSN logically equivalent to ECF_CONST and TREE_READONLY.
 280      1 in a NOTE, or EXPR_LIST for a const call.
 281      1 in a JUMP_INSN, CALL_INSN, or INSN of an annulling branch.  */
 282   unsigned int unchanging : 1;
 283   /* 1 in a MEM or ASM_OPERANDS expression if the memory reference is volatile.
 284      1 in an INSN, CALL_INSN, JUMP_INSN, CODE_LABEL, BARRIER, or NOTE
 285      if it has been deleted.
 286      1 in a REG expression if corresponds to a variable declared by the user,
 287      0 for an internally generated temporary.
 288      1 in a SUBREG used for SUBREG_PROMOTED_UNSIGNED_P.
 289      1 in a LABEL_REF, REG_LABEL_TARGET or REG_LABEL_OPERAND note for a
 290      non-local label.
 291      In a SYMBOL_REF, this flag is used for machine-specific purposes.
 292      In a PREFETCH, this flag indicates that it should be considered a scheduling
 293      barrier.  */
 294   unsigned int volatil : 1;
 295   /* 1 in a MEM referring to a field of an aggregate.
 296      0 if the MEM was a variable or the result of a * operator in C;
 297      1 if it was the result of a . or -> operator (on a struct) in C.
 298      1 in a REG if the register is used only in exit code a loop.
 299      1 in a SUBREG expression if was generated from a variable with a
 300      promoted mode.
 301      1 in a CODE_LABEL if the label is used for nonlocal gotos
 302      and must not be deleted even if its count is zero.
 303      1 in an INSN, JUMP_INSN or CALL_INSN if this insn must be scheduled
 304      together with the preceding insn.  Valid only within sched.
 305      1 in an INSN, JUMP_INSN, or CALL_INSN if insn is in a delay slot and
 306      from the target of a branch.  Valid from reorg until end of compilation;
 307      cleared before used.  */
 308   unsigned int in_struct : 1;
 309   /* At the end of RTL generation, 1 if this rtx is used.  This is used for
 310      copying shared structure.  See `unshare_all_rtl'.
 311      In a REG, this is not needed for that purpose, and used instead
 312      in `leaf_renumber_regs_insn'.
 313      1 in a SYMBOL_REF, means that emit_library_call
 314      has used it as the function.  */
 315   unsigned int used : 1;
 316   /* 1 in an INSN or a SET if this rtx is related to the call frame,
 317      either changing how we compute the frame address or saving and
 318      restoring registers in the prologue and epilogue.
 319      1 in a REG or MEM if it is a pointer.
 320      1 in a SYMBOL_REF if it addresses something in the per-function
 321      constant string pool.  */
 322   unsigned frame_related : 1;
 323   /* 1 in a REG or PARALLEL that is the current function's return value.
 324      1 in a MEM if it refers to a scalar.
 325      1 in a SYMBOL_REF for a weak symbol.
 326      1 in a CALL_INSN logically equivalent to ECF_PURE and DECL_PURE_P. */
 327   unsigned return_val : 1;
 328
 329   /* The first element of the operands of this rtx.
 330      The number of operands and their types are controlled
 331      by the `code' field, according to rtl.def.  */
 332   union u {
 333     rtunion fld[1];
 334     HOST_WIDE_INT hwint[1];
 335     struct block_symbol block_sym;
 336     struct real_value rv;
 337     struct fixed_value fv;
 338   } GTY ((special ("rtx_def"), desc ("GET_CODE (&%0)"))) u;
 339 };
 340
 341 /* The size in bytes of an rtx header (code, mode and flags).  */
 342 #define RTX_HDR_SIZE offsetof (struct rtx_def, u)
 343
 344 /* The size in bytes of an rtx with code CODE.  */
 345 #define RTX_CODE_SIZE(CODE) rtx_code_size[CODE]
 346
 347 #define NULL_RTX (rtx) 0
 348
 349 /* The "next" and "previous" RTX, relative to this one.  */
 350
 351 #define RTX_NEXT(X) (rtx_next[GET_CODE (X)] == 0 ? NULL                 \
 352                      : *(rtx *)(((char *)X) + rtx_next[GET_CODE (X)]))
 353
 354 /* FIXME: the "NEXT_INSN (PREV_INSN (X)) == X" condition shouldn't be needed.
 355  */
 356 #define RTX_PREV(X) ((INSN_P (X)                        \
 357                       || NOTE_P (X)                     \
 358                       || BARRIER_P (X)                  \
 359                       || LABEL_P (X))                   \
 360                      && PREV_INSN (X) != NULL           \
 361                      && NEXT_INSN (PREV_INSN (X)) == X  \
 362                      ? PREV_INSN (X) : NULL)
 363
 364 /* Define macros to access the `code' field of the rtx.  */
 365
 366 #define GET_CODE(RTX)       ((enum rtx_code) (RTX)->code)
 367 #define PUT_CODE(RTX, CODE) ((RTX)->code = (CODE))
 368
 369 #define GET_MODE(RTX)       ((enum machine_mode) (RTX)->mode)
 370 #define PUT_MODE(RTX, MODE) ((RTX)->mode = (MODE))
 371
 372 /* RTL vector.  These appear inside RTX's when there is a need
 373    for a variable number of things.  The principle use is inside
 374    PARALLEL expressions.  */
 375
 376 struct GTY((variable_size)) rtvec_def {
 377   int num_elem;         /* number of elements */
 378   rtx GTY ((length ("%h.num_elem"))) elem[1];
 379 };
 380
 381 #define NULL_RTVEC (rtvec) 0
 382
 383 #define GET_NUM_ELEM(RTVEC)             ((RTVEC)->num_elem)
 384 #define PUT_NUM_ELEM(RTVEC, NUM)        ((RTVEC)->num_elem = (NUM))
 385
 386 /* Predicate yielding nonzero iff X is an rtx for a register.  */
 387 #define REG_P(X) (GET_CODE (X) == REG)
 388
 389 /* Predicate yielding nonzero iff X is an rtx for a memory location.  */
 390 #define MEM_P(X) (GET_CODE (X) == MEM)
 391
 392 /* Predicate yielding nonzero iff X is an rtx for a constant integer.  */
 393 #define CONST_INT_P(X) (GET_CODE (X) == CONST_INT)
 394
 395 /* Predicate yielding true iff X is an rtx for a double-int
 396    or floating point constant.  */
 397 #define CONST_DOUBLE_P(X) (GET_CODE (X) == CONST_DOUBLE)
 398
 399 /* Predicate yielding nonzero iff X is a label insn.  */
 400 #define LABEL_P(X) (GET_CODE (X) == CODE_LABEL)
 401
 402 /* Predicate yielding nonzero iff X is a jump insn.  */
 403 #define JUMP_P(X) (GET_CODE (X) == JUMP_INSN)
 404
 405 /* Predicate yielding nonzero iff X is a call insn.  */
 406 #define CALL_P(X) (GET_CODE (X) == CALL_INSN)
 407
 408 /* Predicate yielding nonzero iff X is an insn that cannot jump.  */
 409 #define NONJUMP_INSN_P(X) (GET_CODE (X) == INSN)
 410
 411 /* Predicate yielding nonzero iff X is a debug note/insn.  */
 412 #define DEBUG_INSN_P(X) (GET_CODE (X) == DEBUG_INSN)
 413
 414 /* Predicate yielding nonzero iff X is an insn that is not a debug insn.  */
 415 #define NONDEBUG_INSN_P(X) (INSN_P (X) && !DEBUG_INSN_P (X))
 416
 417 /* Nonzero if DEBUG_INSN_P may possibly hold.  */
 418 #define MAY_HAVE_DEBUG_INSNS MAY_HAVE_DEBUG_STMTS
 419
 420 /* Predicate yielding nonzero iff X is a real insn.  */
 421 #define INSN_P(X) \
 422   (NONJUMP_INSN_P (X) || DEBUG_INSN_P (X) || JUMP_P (X) || CALL_P (X))
 423
 424 /* Predicate yielding nonzero iff X is a note insn.  */
 425 #define NOTE_P(X) (GET_CODE (X) == NOTE)
 426
 427 /* Predicate yielding nonzero iff X is a barrier insn.  */
 428 #define BARRIER_P(X) (GET_CODE (X) == BARRIER)
 429
 430 /* Predicate yielding nonzero iff X is a data for a jump table.  */
 431 #define JUMP_TABLE_DATA_P(INSN) \
 432   (JUMP_P (INSN) && (GET_CODE (PATTERN (INSN)) == ADDR_VEC || \
 433                      GET_CODE (PATTERN (INSN)) == ADDR_DIFF_VEC))
 434
 435 /* 1 if X is a unary operator.  */
 436
 437 #define UNARY_P(X)   \
 438   (GET_RTX_CLASS (GET_CODE (X)) == RTX_UNARY)
 439
 440 /* 1 if X is a binary operator.  */
 441
 442 #define BINARY_P(X)   \
 443   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_BINARY_MASK) == RTX_BINARY_RESULT)
 444
 445 /* 1 if X is an arithmetic operator.  */
 446
 447 #define ARITHMETIC_P(X)   \
 448   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_ARITHMETIC_MASK)                 \
 449     == RTX_ARITHMETIC_RESULT)
 450
 451 /* 1 if X is an arithmetic operator.  */
 452
 453 #define COMMUTATIVE_ARITH_P(X)   \
 454   (GET_RTX_CLASS (GET_CODE (X)) == RTX_COMM_ARITH)
 455
 456 /* 1 if X is a commutative arithmetic operator or a comparison operator.
 457    These two are sometimes selected together because it is possible to
 458    swap the two operands.  */
 459
 460 #define SWAPPABLE_OPERANDS_P(X)   \
 461   ((1 << GET_RTX_CLASS (GET_CODE (X)))                                  \
 462     & ((1 << RTX_COMM_ARITH) | (1 << RTX_COMM_COMPARE)                  \
 463        | (1 << RTX_COMPARE)))
 464
 465 /* 1 if X is a non-commutative operator.  */
 466
 467 #define NON_COMMUTATIVE_P(X)   \
 468   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK)                \
 469     == RTX_NON_COMMUTATIVE_RESULT)
 470
 471 /* 1 if X is a commutative operator on integers.  */
 472
 473 #define COMMUTATIVE_P(X)   \
 474   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMMUTATIVE_MASK)                \
 475     == RTX_COMMUTATIVE_RESULT)
 476
 477 /* 1 if X is a relational operator.  */
 478
 479 #define COMPARISON_P(X)   \
 480   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_COMPARE_MASK) == RTX_COMPARE_RESULT)
 481
 482 /* 1 if X is a constant value that is an integer.  */
 483
 484 #define CONSTANT_P(X)   \
 485   (GET_RTX_CLASS (GET_CODE (X)) == RTX_CONST_OBJ)
 486
 487 /* 1 if X can be used to represent an object.  */
 488 #define OBJECT_P(X)                                                     \
 489   ((GET_RTX_CLASS (GET_CODE (X)) & RTX_OBJ_MASK) == RTX_OBJ_RESULT)
 490
 491 /* General accessor macros for accessing the fields of an rtx.  */
 492
 493 #if defined ENABLE_RTL_CHECKING && (GCC_VERSION >= 2007)
 494 /* The bit with a star outside the statement expr and an & inside is
 495    so that N can be evaluated only once.  */
 496 #define RTL_CHECK1(RTX, N, C1) __extension__                            \
 497 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 498      const enum rtx_code _code = GET_CODE (_rtx);                       \
 499      if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                        \
 500        rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
 501                                 __FUNCTION__);                          \
 502      if (GET_RTX_FORMAT(_code)[_n] != C1)                               \
 503        rtl_check_failed_type1 (_rtx, _n, C1, __FILE__, __LINE__,        \
 504                                __FUNCTION__);                           \
 505      &_rtx->u.fld[_n]; }))
 506
 507 #define RTL_CHECK2(RTX, N, C1, C2) __extension__                        \
 508 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 509      const enum rtx_code _code = GET_CODE (_rtx);                       \
 510      if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                        \
 511        rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
 512                                 __FUNCTION__);                          \
 513      if (GET_RTX_FORMAT(_code)[_n] != C1                                \
 514          && GET_RTX_FORMAT(_code)[_n] != C2)                            \
 515        rtl_check_failed_type2 (_rtx, _n, C1, C2, __FILE__, __LINE__,    \
 516                                __FUNCTION__);                           \
 517      &_rtx->u.fld[_n]; }))
 518
 519 #define RTL_CHECKC1(RTX, N, C) __extension__                            \
 520 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 521      if (GET_CODE (_rtx) != (C))                                        \
 522        rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__,           \
 523                                __FUNCTION__);                           \
 524      &_rtx->u.fld[_n]; }))
 525
 526 #define RTL_CHECKC2(RTX, N, C1, C2) __extension__                       \
 527 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 528      const enum rtx_code _code = GET_CODE (_rtx);                       \
 529      if (_code != (C1) && _code != (C2))                                \
 530        rtl_check_failed_code2 (_rtx, (C1), (C2), __FILE__, __LINE__,    \
 531                                __FUNCTION__); \
 532      &_rtx->u.fld[_n]; }))
 533
 534 #define RTVEC_ELT(RTVEC, I) __extension__                               \
 535 (*({ __typeof (RTVEC) const _rtvec = (RTVEC); const int _i = (I);       \
 536      if (_i < 0 || _i >= GET_NUM_ELEM (_rtvec))                         \
 537        rtvec_check_failed_bounds (_rtvec, _i, __FILE__, __LINE__,       \
 538                                   __FUNCTION__);                        \
 539      &_rtvec->elem[_i]; }))
 540
 541 #define XWINT(RTX, N) __extension__                                     \
 542 (*({ __typeof (RTX) const _rtx = (RTX); const int _n = (N);             \
 543      const enum rtx_code _code = GET_CODE (_rtx);                       \
 544      if (_n < 0 || _n >= GET_RTX_LENGTH (_code))                        \
 545        rtl_check_failed_bounds (_rtx, _n, __FILE__, __LINE__,           \
 546                                 __FUNCTION__);                          \
 547      if (GET_RTX_FORMAT(_code)[_n] != 'w')                              \
 548        rtl_check_failed_type1 (_rtx, _n, 'w', __FILE__, __LINE__,       \
 549                                __FUNCTION__);                           \
 550      &_rtx->u.hwint[_n]; }))
 551
 552 #define XCWINT(RTX, N, C) __extension__                                 \
 553 (*({ __typeof (RTX) const _rtx = (RTX);                                 \
 554      if (GET_CODE (_rtx) != (C))                                        \
 555        rtl_check_failed_code1 (_rtx, (C), __FILE__, __LINE__,           \
 556                                __FUNCTION__);                           \
 557      &_rtx->u.hwint[N]; }))
 558
 559 #define XCMWINT(RTX, N, C, M) __extension__                             \
 560 (*({ __typeof (RTX) const _rtx = (RTX);                                 \
 561      if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) != (M))              \
 562        rtl_check_failed_code_mode (_rtx, (C), (M), false, __FILE__,     \
 563                                    __LINE__, __FUNCTION__);             \
 564      &_rtx->u.hwint[N]; }))
 565
 566 #define XCNMPRV(RTX, C, M) __extension__                                \
 567 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 568    if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M))                \
 569      rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__,        \
 570                                  __LINE__, __FUNCTION__);               \
 571    &_rtx->u.rv; })
 572
 573 #define XCNMPFV(RTX, C, M) __extension__                                \
 574 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 575    if (GET_CODE (_rtx) != (C) || GET_MODE (_rtx) == (M))                \
 576      rtl_check_failed_code_mode (_rtx, (C), (M), true, __FILE__,        \
 577                                  __LINE__, __FUNCTION__);               \
 578    &_rtx->u.fv; })
 579
 580 #define BLOCK_SYMBOL_CHECK(RTX) __extension__                           \
 581 ({ __typeof (RTX) const _symbol = (RTX);                                \
 582    const unsigned int flags = RTL_CHECKC1 (_symbol, 1, SYMBOL_REF).rt_int; \
 583    if ((flags & SYMBOL_FLAG_HAS_BLOCK_INFO) == 0)                       \
 584      rtl_check_failed_block_symbol (__FILE__, __LINE__,                 \
 585                                     __FUNCTION__);                      \
 586    &_symbol->u.block_sym; })
 587
 588 extern void rtl_check_failed_bounds (const_rtx, int, const char *, int,
 589                                      const char *)
 590     ATTRIBUTE_NORETURN;
 591 extern void rtl_check_failed_type1 (const_rtx, int, int, const char *, int,
 592                                     const char *)
 593     ATTRIBUTE_NORETURN;
 594 extern void rtl_check_failed_type2 (const_rtx, int, int, int, const char *,
 595                                     int, const char *)
 596     ATTRIBUTE_NORETURN;
 597 extern void rtl_check_failed_code1 (const_rtx, enum rtx_code, const char *,
 598                                     int, const char *)
 599     ATTRIBUTE_NORETURN;
 600 extern void rtl_check_failed_code2 (const_rtx, enum rtx_code, enum rtx_code,
 601                                     const char *, int, const char *)
 602     ATTRIBUTE_NORETURN;
 603 extern void rtl_check_failed_code_mode (const_rtx, enum rtx_code, enum machine_mode,
 604                                         bool, const char *, int, const char *)
 605     ATTRIBUTE_NORETURN;
 606 extern void rtl_check_failed_block_symbol (const char *, int, const char *)
 607     ATTRIBUTE_NORETURN;
 608 extern void rtvec_check_failed_bounds (const_rtvec, int, const char *, int,
 609                                        const char *)
 610     ATTRIBUTE_NORETURN;
 611
 612 #else   /* not ENABLE_RTL_CHECKING */
 613
 614 #define RTL_CHECK1(RTX, N, C1)      ((RTX)->u.fld[N])
 615 #define RTL_CHECK2(RTX, N, C1, C2)  ((RTX)->u.fld[N])
 616 #define RTL_CHECKC1(RTX, N, C)      ((RTX)->u.fld[N])
 617 #define RTL_CHECKC2(RTX, N, C1, C2) ((RTX)->u.fld[N])
 618 #define RTVEC_ELT(RTVEC, I)         ((RTVEC)->elem[I])
 619 #define XWINT(RTX, N)               ((RTX)->u.hwint[N])
 620 #define XCWINT(RTX, N, C)           ((RTX)->u.hwint[N])
 621 #define XCMWINT(RTX, N, C, M)       ((RTX)->u.hwint[N])
 622 #define XCNMWINT(RTX, N, C, M)      ((RTX)->u.hwint[N])
 623 #define XCNMPRV(RTX, C, M)          (&(RTX)->u.rv)
 624 #define XCNMPFV(RTX, C, M)          (&(RTX)->u.fv)
 625 #define BLOCK_SYMBOL_CHECK(RTX)     (&(RTX)->u.block_sym)
 626
 627 #endif
 628
 629 /* General accessor macros for accessing the flags of an rtx.  */
 630
 631 /* Access an individual rtx flag, with no checking of any kind.  */
 632 #define RTX_FLAG(RTX, FLAG)     ((RTX)->FLAG)
 633
 634 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION >= 2007)
 635 #define RTL_FLAG_CHECK1(NAME, RTX, C1) __extension__                    \
 636 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 637    if (GET_CODE(_rtx) != C1)                                            \
 638      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 639                              __FUNCTION__);                             \
 640    _rtx; })
 641
 642 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2) __extension__                \
 643 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 644    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2)                    \
 645      rtl_check_failed_flag  (NAME,_rtx, __FILE__, __LINE__,             \
 646                               __FUNCTION__);                            \
 647    _rtx; })
 648
 649 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3) __extension__            \
 650 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 651    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 652        && GET_CODE(_rtx) != C3)                                         \
 653      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 654                              __FUNCTION__);                             \
 655    _rtx; })
 656
 657 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4) __extension__        \
 658 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 659    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 660        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4)                 \
 661      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 662                               __FUNCTION__);                            \
 663    _rtx; })
 664
 665 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5) __extension__    \
 666 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 667    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 668        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 669        && GET_CODE(_rtx) != C5)                                         \
 670      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 671                              __FUNCTION__);                             \
 672    _rtx; })
 673
 674 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6)              \
 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      rtl_check_failed_flag  (NAME,_rtx, __FILE__, __LINE__,             \
 681                              __FUNCTION__);                             \
 682    _rtx; })
 683
 684 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7)          \
 685   __extension__                                                         \
 686 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 687    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 688        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 689        && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6                  \
 690        && GET_CODE(_rtx) != C7)                                         \
 691      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 692                              __FUNCTION__);                             \
 693    _rtx; })
 694
 695 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8)      \
 696   __extension__                                                         \
 697 ({ __typeof (RTX) const _rtx = (RTX);                                   \
 698    if (GET_CODE(_rtx) != C1 && GET_CODE(_rtx) != C2                     \
 699        && GET_CODE(_rtx) != C3 && GET_CODE(_rtx) != C4                  \
 700        && GET_CODE(_rtx) != C5 && GET_CODE(_rtx) != C6                  \
 701        && GET_CODE(_rtx) != C7 && GET_CODE(_rtx) != C8)                 \
 702      rtl_check_failed_flag  (NAME, _rtx, __FILE__, __LINE__,            \
 703                              __FUNCTION__);                             \
 704    _rtx; })
 705
 706 extern void rtl_check_failed_flag (const char *, const_rtx, const char *,
 707                                    int, const char *)
 708     ATTRIBUTE_NORETURN
 709     ;
 710
 711 #else   /* not ENABLE_RTL_FLAG_CHECKING */
 712
 713 #define RTL_FLAG_CHECK1(NAME, RTX, C1)                                  (RTX)
 714 #define RTL_FLAG_CHECK2(NAME, RTX, C1, C2)                              (RTX)
 715 #define RTL_FLAG_CHECK3(NAME, RTX, C1, C2, C3)                          (RTX)
 716 #define RTL_FLAG_CHECK4(NAME, RTX, C1, C2, C3, C4)                      (RTX)
 717 #define RTL_FLAG_CHECK5(NAME, RTX, C1, C2, C3, C4, C5)          (RTX)
 718 #define RTL_FLAG_CHECK6(NAME, RTX, C1, C2, C3, C4, C5, C6)              (RTX)
 719 #define RTL_FLAG_CHECK7(NAME, RTX, C1, C2, C3, C4, C5, C6, C7)          (RTX)
 720 #define RTL_FLAG_CHECK8(NAME, RTX, C1, C2, C3, C4, C5, C6, C7, C8)      (RTX)
 721 #endif
 722
 723 #define XINT(RTX, N)    (RTL_CHECK2 (RTX, N, 'i', 'n').rt_int)
 724 #define XSTR(RTX, N)    (RTL_CHECK2 (RTX, N, 's', 'S').rt_str)
 725 #define XEXP(RTX, N)    (RTL_CHECK2 (RTX, N, 'e', 'u').rt_rtx)
 726 #define XVEC(RTX, N)    (RTL_CHECK2 (RTX, N, 'E', 'V').rt_rtvec)
 727 #define XMODE(RTX, N)   (RTL_CHECK1 (RTX, N, 'M').rt_type)
 728 #define XTREE(RTX, N)   (RTL_CHECK1 (RTX, N, 't').rt_tree)
 729 #define XBBDEF(RTX, N)  (RTL_CHECK1 (RTX, N, 'B').rt_bb)
 730 #define XTMPL(RTX, N)   (RTL_CHECK1 (RTX, N, 'T').rt_str)
 731 #define XCFI(RTX, N)    (RTL_CHECK1 (RTX, N, 'C').rt_cfi)
 732
 733 #define XVECEXP(RTX, N, M)      RTVEC_ELT (XVEC (RTX, N), M)
 734 #define XVECLEN(RTX, N)         GET_NUM_ELEM (XVEC (RTX, N))
 735
 736 /* These are like XINT, etc. except that they expect a '0' field instead
 737    of the normal type code.  */
 738
 739 #define X0INT(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_int)
 740 #define X0UINT(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_uint)
 741 #define X0STR(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_str)
 742 #define X0EXP(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_rtx)
 743 #define X0VEC(RTX, N)      (RTL_CHECK1 (RTX, N, '0').rt_rtvec)
 744 #define X0MODE(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_type)
 745 #define X0TREE(RTX, N)     (RTL_CHECK1 (RTX, N, '0').rt_tree)
 746 #define X0BBDEF(RTX, N)    (RTL_CHECK1 (RTX, N, '0').rt_bb)
 747 #define X0ADVFLAGS(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_addr_diff_vec_flags)
 748 #define X0CSELIB(RTX, N)   (RTL_CHECK1 (RTX, N, '0').rt_cselib)
 749 #define X0MEMATTR(RTX, N)  (RTL_CHECKC1 (RTX, N, MEM).rt_mem)
 750 #define X0REGATTR(RTX, N)  (RTL_CHECKC1 (RTX, N, REG).rt_reg)
 751 #define X0CONSTANT(RTX, N) (RTL_CHECK1 (RTX, N, '0').rt_constant)
 752
 753 /* Access a '0' field with any type.  */
 754 #define X0ANY(RTX, N)      RTL_CHECK1 (RTX, N, '0')
 755
 756 #define XCINT(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_int)
 757 #define XCUINT(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_uint)
 758 #define XCSTR(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_str)
 759 #define XCEXP(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_rtx)
 760 #define XCVEC(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_rtvec)
 761 #define XCMODE(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_type)
 762 #define XCTREE(RTX, N, C)     (RTL_CHECKC1 (RTX, N, C).rt_tree)
 763 #define XCBBDEF(RTX, N, C)    (RTL_CHECKC1 (RTX, N, C).rt_bb)
 764 #define XCCFI(RTX, N, C)      (RTL_CHECKC1 (RTX, N, C).rt_cfi)
 765 #define XCCSELIB(RTX, N, C)   (RTL_CHECKC1 (RTX, N, C).rt_cselib)
 766
 767 #define XCVECEXP(RTX, N, M, C)  RTVEC_ELT (XCVEC (RTX, N, C), M)
 768 #define XCVECLEN(RTX, N, C)     GET_NUM_ELEM (XCVEC (RTX, N, C))
 769
 770 #define XC2EXP(RTX, N, C1, C2)      (RTL_CHECKC2 (RTX, N, C1, C2).rt_rtx)
 771 \f
 772 /* ACCESS MACROS for particular fields of insns.  */
 773
 774 /* Holds a unique number for each insn.
 775    These are not necessarily sequentially increasing.  */
 776 #define INSN_UID(INSN)  XINT (INSN, 0)
 777
 778 /* Chain insns together in sequence.  */
 779 #define PREV_INSN(INSN) XEXP (INSN, 1)
 780 #define NEXT_INSN(INSN) XEXP (INSN, 2)
 781
 782 #define BLOCK_FOR_INSN(INSN) XBBDEF (INSN, 3)
 783
 784 /* The body of an insn.  */
 785 #define PATTERN(INSN)   XEXP (INSN, 4)
 786
 787 #define INSN_LOCATOR(INSN) XINT (INSN, 5)
 788 /* LOCATION of an RTX if relevant.  */
 789 #define RTL_LOCATION(X) (INSN_P (X) ? \
 790                          locator_location (INSN_LOCATOR (X)) \
 791                          : UNKNOWN_LOCATION)
 792 /* LOCATION of current INSN.  */
 793 #define CURR_INSN_LOCATION (locator_location (curr_insn_locator ()))
 794
 795 /* Code number of instruction, from when it was recognized.
 796    -1 means this instruction has not been recognized yet.  */
 797 #define INSN_CODE(INSN) XINT (INSN, 6)
 798
 799 #define RTX_FRAME_RELATED_P(RTX)                                        \
 800   (RTL_FLAG_CHECK6("RTX_FRAME_RELATED_P", (RTX), DEBUG_INSN, INSN,      \
 801                    CALL_INSN, JUMP_INSN, BARRIER, SET)->frame_related)
 802
 803 /* 1 if RTX is an insn that has been deleted.  */
 804 #define INSN_DELETED_P(RTX)                                             \
 805   (RTL_FLAG_CHECK7("INSN_DELETED_P", (RTX), DEBUG_INSN, INSN,           \
 806                    CALL_INSN, JUMP_INSN,                                \
 807                    CODE_LABEL, BARRIER, NOTE)->volatil)
 808
 809 /* 1 if RTX is a call to a const function.  Built from ECF_CONST and
 810    TREE_READONLY.  */
 811 #define RTL_CONST_CALL_P(RTX)                                   \
 812   (RTL_FLAG_CHECK1("RTL_CONST_CALL_P", (RTX), CALL_INSN)->unchanging)
 813
 814 /* 1 if RTX is a call to a pure function.  Built from ECF_PURE and
 815    DECL_PURE_P.  */
 816 #define RTL_PURE_CALL_P(RTX)                                    \
 817   (RTL_FLAG_CHECK1("RTL_PURE_CALL_P", (RTX), CALL_INSN)->return_val)
 818
 819 /* 1 if RTX is a call to a const or pure function.  */
 820 #define RTL_CONST_OR_PURE_CALL_P(RTX) \
 821   (RTL_CONST_CALL_P(RTX) || RTL_PURE_CALL_P(RTX))
 822
 823 /* 1 if RTX is a call to a looping const or pure function.  Built from
 824    ECF_LOOPING_CONST_OR_PURE and DECL_LOOPING_CONST_OR_PURE_P.  */
 825 #define RTL_LOOPING_CONST_OR_PURE_CALL_P(RTX)                                   \
 826   (RTL_FLAG_CHECK1("CONST_OR_PURE_CALL_P", (RTX), CALL_INSN)->call)
 827
 828 /* 1 if RTX is a call_insn for a sibling call.  */
 829 #define SIBLING_CALL_P(RTX)                                             \
 830   (RTL_FLAG_CHECK1("SIBLING_CALL_P", (RTX), CALL_INSN)->jump)
 831
 832 /* 1 if RTX is a jump_insn, call_insn, or insn that is an annulling branch.  */
 833 #define INSN_ANNULLED_BRANCH_P(RTX)                                     \
 834   (RTL_FLAG_CHECK3("INSN_ANNULLED_BRANCH_P", (RTX), JUMP_INSN, CALL_INSN, INSN)->unchanging)
 835
 836 /* 1 if RTX is an insn in a delay slot and is from the target of the branch.
 837    If the branch insn has INSN_ANNULLED_BRANCH_P set, this insn should only be
 838    executed if the branch is taken.  For annulled branches with this bit
 839    clear, the insn should be executed only if the branch is not taken.  */
 840 #define INSN_FROM_TARGET_P(RTX)                                         \
 841   (RTL_FLAG_CHECK3("INSN_FROM_TARGET_P", (RTX), INSN, JUMP_INSN, CALL_INSN)->in_struct)
 842
 843 /* In an ADDR_DIFF_VEC, the flags for RTX for use by branch shortening.
 844    See the comments for ADDR_DIFF_VEC in rtl.def.  */
 845 #define ADDR_DIFF_VEC_FLAGS(RTX) X0ADVFLAGS(RTX, 4)
 846
 847 /* In a VALUE, the value cselib has assigned to RTX.
 848    This is a "struct cselib_val_struct", see cselib.h.  */
 849 #define CSELIB_VAL_PTR(RTX) X0CSELIB(RTX, 0)
 850
 851 /* Holds a list of notes on what this insn does to various REGs.
 852    It is a chain of EXPR_LIST rtx's, where the second operand is the
 853    chain pointer and the first operand is the REG being described.
 854    The mode field of the EXPR_LIST contains not a real machine mode
 855    but a value from enum reg_note.  */
 856 #define REG_NOTES(INSN) XEXP(INSN, 7)
 857
 858 /* In an ENTRY_VALUE this is the DECL_INCOMING_RTL of the argument in
 859    question.  */
 860 #define ENTRY_VALUE_EXP(RTX) (RTL_CHECKC1 (RTX, 0, ENTRY_VALUE).rt_rtx)
 861
 862 enum reg_note
 863 {
 864 #define DEF_REG_NOTE(NAME) NAME,
 865 #include "reg-notes.def"
 866 #undef DEF_REG_NOTE
 867   REG_NOTE_MAX
 868 };
 869
 870 /* Define macros to extract and insert the reg-note kind in an EXPR_LIST.  */
 871 #define REG_NOTE_KIND(LINK) ((enum reg_note) GET_MODE (LINK))
 872 #define PUT_REG_NOTE_KIND(LINK, KIND) \
 873   PUT_MODE (LINK, (enum machine_mode) (KIND))
 874
 875 /* Names for REG_NOTE's in EXPR_LIST insn's.  */
 876
 877 extern const char * const reg_note_name[];
 878 #define GET_REG_NOTE_NAME(MODE) (reg_note_name[(int) (MODE)])
 879
 880 /* This field is only present on CALL_INSNs.  It holds a chain of EXPR_LIST of
 881    USE and CLOBBER expressions.
 882      USE expressions list the registers filled with arguments that
 883    are passed to the function.
 884      CLOBBER expressions document the registers explicitly clobbered
 885    by this CALL_INSN.
 886      Pseudo registers can not be mentioned in this list.  */
 887 #define CALL_INSN_FUNCTION_USAGE(INSN)  XEXP(INSN, 8)
 888
 889 /* The label-number of a code-label.  The assembler label
 890    is made from `L' and the label-number printed in decimal.
 891    Label numbers are unique in a compilation.  */
 892 #define CODE_LABEL_NUMBER(INSN) XINT (INSN, 6)
 893
 894 /* In a NOTE that is a line number, this is a string for the file name that the
 895    line is in.  We use the same field to record block numbers temporarily in
 896    NOTE_INSN_BLOCK_BEG and NOTE_INSN_BLOCK_END notes.  (We avoid lots of casts
 897    between ints and pointers if we use a different macro for the block number.)
 898    */
 899
 900 /* Opaque data.  */
 901 #define NOTE_DATA(INSN)         RTL_CHECKC1 (INSN, 4, NOTE)
 902 #define NOTE_DELETED_LABEL_NAME(INSN) XCSTR (INSN, 4, NOTE)
 903 #define SET_INSN_DELETED(INSN) set_insn_deleted (INSN);
 904 #define NOTE_BLOCK(INSN)        XCTREE (INSN, 4, NOTE)
 905 #define NOTE_EH_HANDLER(INSN)   XCINT (INSN, 4, NOTE)
 906 #define NOTE_BASIC_BLOCK(INSN)  XCBBDEF (INSN, 4, NOTE)
 907 #define NOTE_VAR_LOCATION(INSN) XCEXP (INSN, 4, NOTE)
 908 #define NOTE_CFI(INSN)          XCCFI (INSN, 4, NOTE)
 909 #define NOTE_LABEL_NUMBER(INSN) XCINT (INSN, 4, NOTE)
 910
 911 /* In a NOTE that is a line number, this is the line number.
 912    Other kinds of NOTEs are identified by negative numbers here.  */
 913 #define NOTE_KIND(INSN) XCINT (INSN, 5, NOTE)
 914
 915 /* Nonzero if INSN is a note marking the beginning of a basic block.  */
 916 #define NOTE_INSN_BASIC_BLOCK_P(INSN)                   \
 917   (GET_CODE (INSN) == NOTE                              \
 918    && NOTE_KIND (INSN) == NOTE_INSN_BASIC_BLOCK)
 919
 920 /* Variable declaration and the location of a variable.  */
 921 #define PAT_VAR_LOCATION_DECL(PAT) (XCTREE ((PAT), 0, VAR_LOCATION))
 922 #define PAT_VAR_LOCATION_LOC(PAT) (XCEXP ((PAT), 1, VAR_LOCATION))
 923
 924 /* Initialization status of the variable in the location.  Status
 925    can be unknown, uninitialized or initialized.  See enumeration
 926    type below.  */
 927 #define PAT_VAR_LOCATION_STATUS(PAT) \
 928   ((enum var_init_status) (XCINT ((PAT), 2, VAR_LOCATION)))
 929
 930 /* Accessors for a NOTE_INSN_VAR_LOCATION.  */
 931 #define NOTE_VAR_LOCATION_DECL(NOTE) \
 932   PAT_VAR_LOCATION_DECL (NOTE_VAR_LOCATION (NOTE))
 933 #define NOTE_VAR_LOCATION_LOC(NOTE) \
 934   PAT_VAR_LOCATION_LOC (NOTE_VAR_LOCATION (NOTE))
 935 #define NOTE_VAR_LOCATION_STATUS(NOTE) \
 936   PAT_VAR_LOCATION_STATUS (NOTE_VAR_LOCATION (NOTE))
 937
 938 /* The VAR_LOCATION rtx in a DEBUG_INSN.  */
 939 #define INSN_VAR_LOCATION(INSN) PATTERN (INSN)
 940
 941 /* Accessors for a tree-expanded var location debug insn.  */
 942 #define INSN_VAR_LOCATION_DECL(INSN) \
 943   PAT_VAR_LOCATION_DECL (INSN_VAR_LOCATION (INSN))
 944 #define INSN_VAR_LOCATION_LOC(INSN) \
 945   PAT_VAR_LOCATION_LOC (INSN_VAR_LOCATION (INSN))
 946 #define INSN_VAR_LOCATION_STATUS(INSN) \
 947   PAT_VAR_LOCATION_STATUS (INSN_VAR_LOCATION (INSN))
 948
 949 /* Expand to the RTL that denotes an unknown variable location in a
 950    DEBUG_INSN.  */
 951 #define gen_rtx_UNKNOWN_VAR_LOC() (gen_rtx_CLOBBER (VOIDmode, const0_rtx))
 952
 953 /* Determine whether X is such an unknown location.  */
 954 #define VAR_LOC_UNKNOWN_P(X) \
 955   (GET_CODE (X) == CLOBBER && XEXP ((X), 0) == const0_rtx)
 956
 957 /* 1 if RTX is emitted after a call, but it should take effect before
 958    the call returns.  */
 959 #define NOTE_DURING_CALL_P(RTX)                         \
 960   (RTL_FLAG_CHECK1("NOTE_VAR_LOCATION_DURING_CALL_P", (RTX), NOTE)->call)
 961
 962 /* DEBUG_EXPR_DECL corresponding to a DEBUG_EXPR RTX.  */
 963 #define DEBUG_EXPR_TREE_DECL(RTX) XCTREE (RTX, 0, DEBUG_EXPR)
 964
 965 /* VAR_DECL/PARM_DECL DEBUG_IMPLICIT_PTR takes address of.  */
 966 #define DEBUG_IMPLICIT_PTR_DECL(RTX) XCTREE (RTX, 0, DEBUG_IMPLICIT_PTR)
 967
 968 /* PARM_DECL DEBUG_PARAMETER_REF references.  */
 969 #define DEBUG_PARAMETER_REF_DECL(RTX) XCTREE (RTX, 0, DEBUG_PARAMETER_REF)
 970
 971 /* Codes that appear in the NOTE_KIND field for kinds of notes
 972    that are not line numbers.  These codes are all negative.
 973
 974    Notice that we do not try to use zero here for any of
 975    the special note codes because sometimes the source line
 976    actually can be zero!  This happens (for example) when we
 977    are generating code for the per-translation-unit constructor
 978    and destructor routines for some C++ translation unit.  */
 979
 980 enum insn_note
 981 {
 982 #define DEF_INSN_NOTE(NAME) NAME,
 983 #include "insn-notes.def"
 984 #undef DEF_INSN_NOTE
 985
 986   NOTE_INSN_MAX
 987 };
 988
 989 /* Names for NOTE insn's other than line numbers.  */
 990
 991 extern const char * const note_insn_name[NOTE_INSN_MAX];
 992 #define GET_NOTE_INSN_NAME(NOTE_CODE) \
 993   (note_insn_name[(NOTE_CODE)])
 994
 995 /* The name of a label, in case it corresponds to an explicit label
 996    in the input source code.  */
 997 #define LABEL_NAME(RTX) XCSTR (RTX, 7, CODE_LABEL)
 998
 999 /* In jump.c, each label contains a count of the number
1000    of LABEL_REFs that point at it, so unused labels can be deleted.  */
1001 #define LABEL_NUSES(RTX) XCINT (RTX, 5, CODE_LABEL)
1002
1003 /* Labels carry a two-bit field composed of the ->jump and ->call
1004    bits.  This field indicates whether the label is an alternate
1005    entry point, and if so, what kind.  */
1006 enum label_kind
1007 {
1008   LABEL_NORMAL = 0,     /* ordinary label */
1009   LABEL_STATIC_ENTRY,   /* alternate entry point, not exported */
1010   LABEL_GLOBAL_ENTRY,   /* alternate entry point, exported */
1011   LABEL_WEAK_ENTRY      /* alternate entry point, exported as weak symbol */
1012 };
1013
1014 #if defined ENABLE_RTL_FLAG_CHECKING && (GCC_VERSION > 2007)
1015
1016 /* Retrieve the kind of LABEL.  */
1017 #define LABEL_KIND(LABEL) __extension__                                 \
1018 ({ __typeof (LABEL) const _label = (LABEL);                             \
1019    if (GET_CODE (_label) != CODE_LABEL)                                 \
1020      rtl_check_failed_flag ("LABEL_KIND", _label, __FILE__, __LINE__,   \
1021                             __FUNCTION__);                              \
1022    (enum label_kind) ((_label->jump << 1) | _label->call); })
1023
1024 /* Set the kind of LABEL.  */
1025 #define SET_LABEL_KIND(LABEL, KIND) do {                                \
1026    __typeof (LABEL) const _label = (LABEL);                             \
1027    const unsigned int _kind = (KIND);                                   \
1028    if (GET_CODE (_label) != CODE_LABEL)                                 \
1029      rtl_check_failed_flag ("SET_LABEL_KIND", _label, __FILE__, __LINE__, \
1030                             __FUNCTION__);                              \
1031    _label->jump = ((_kind >> 1) & 1);                                   \
1032    _label->call = (_kind & 1);                                          \
1033 } while (0)
1034
1035 #else
1036
1037 /* Retrieve the kind of LABEL.  */
1038 #define LABEL_KIND(LABEL) \
1039    ((enum label_kind) (((LABEL)->jump << 1) | (LABEL)->call))
1040
1041 /* Set the kind of LABEL.  */
1042 #define SET_LABEL_KIND(LABEL, KIND) do {                                \
1043    rtx const _label = (LABEL);                                          \
1044    const unsigned int _kind = (KIND);                                   \
1045    _label->jump = ((_kind >> 1) & 1);                                   \
1046    _label->call = (_kind & 1);                                          \
1047 } while (0)
1048
1049 #endif /* rtl flag checking */
1050
1051 #define LABEL_ALT_ENTRY_P(LABEL) (LABEL_KIND (LABEL) != LABEL_NORMAL)
1052
1053 /* In jump.c, each JUMP_INSN can point to a label that it can jump to,
1054    so that if the JUMP_INSN is deleted, the label's LABEL_NUSES can
1055    be decremented and possibly the label can be deleted.  */
1056 #define JUMP_LABEL(INSN)   XCEXP (INSN, 8, JUMP_INSN)
1057
1058 /* Once basic blocks are found, each CODE_LABEL starts a chain that
1059    goes through all the LABEL_REFs that jump to that label.  The chain
1060    eventually winds up at the CODE_LABEL: it is circular.  */
1061 #define LABEL_REFS(LABEL) XCEXP (LABEL, 4, CODE_LABEL)
1062 \f
1063 /* For a REG rtx, REGNO extracts the register number.  REGNO can only
1064    be used on RHS.  Use SET_REGNO to change the value.  */
1065 #define REGNO(RTX) (rhs_regno(RTX))
1066 #define SET_REGNO(RTX,N) (df_ref_change_reg_with_loc (REGNO(RTX), N, RTX), XCUINT (RTX, 0, REG) = N)
1067 #define SET_REGNO_RAW(RTX,N) (XCUINT (RTX, 0, REG) = N)
1068
1069 /* ORIGINAL_REGNO holds the number the register originally had; for a
1070    pseudo register turned into a hard reg this will hold the old pseudo
1071    register number.  */
1072 #define ORIGINAL_REGNO(RTX) X0UINT (RTX, 1)
1073
1074 /* Force the REGNO macro to only be used on the lhs.  */
1075 static inline unsigned int
1076 rhs_regno (const_rtx x)
1077 {
1078   return XCUINT (x, 0, REG);
1079 }
1080
1081
1082 /* 1 if RTX is a reg or parallel that is the current function's return
1083    value.  */
1084 #define REG_FUNCTION_VALUE_P(RTX)                                       \
1085   (RTL_FLAG_CHECK2("REG_FUNCTION_VALUE_P", (RTX), REG, PARALLEL)->return_val)
1086
1087 /* 1 if RTX is a reg that corresponds to a variable declared by the user.  */
1088 #define REG_USERVAR_P(RTX)                                              \
1089   (RTL_FLAG_CHECK1("REG_USERVAR_P", (RTX), REG)->volatil)
1090
1091 /* 1 if RTX is a reg that holds a pointer value.  */
1092 #define REG_POINTER(RTX)                                                \
1093   (RTL_FLAG_CHECK1("REG_POINTER", (RTX), REG)->frame_related)
1094
1095 /* 1 if RTX is a mem that holds a pointer value.  */
1096 #define MEM_POINTER(RTX)                                                \
1097   (RTL_FLAG_CHECK1("MEM_POINTER", (RTX), MEM)->frame_related)
1098
1099 /* 1 if the given register REG corresponds to a hard register.  */
1100 #define HARD_REGISTER_P(REG) (HARD_REGISTER_NUM_P (REGNO (REG)))
1101
1102 /* 1 if the given register number REG_NO corresponds to a hard register.  */
1103 #define HARD_REGISTER_NUM_P(REG_NO) ((REG_NO) < FIRST_PSEUDO_REGISTER)
1104
1105 /* For a CONST_INT rtx, INTVAL extracts the integer.  */
1106 #define INTVAL(RTX) XCWINT(RTX, 0, CONST_INT)
1107 #define UINTVAL(RTX) ((unsigned HOST_WIDE_INT) INTVAL (RTX))
1108
1109 /* For a CONST_DOUBLE:
1110    For a VOIDmode, there are two integers CONST_DOUBLE_LOW is the
1111      low-order word and ..._HIGH the high-order.
1112    For a float, there is a REAL_VALUE_TYPE structure, and
1113      CONST_DOUBLE_REAL_VALUE(r) is a pointer to it.  */
1114 #define CONST_DOUBLE_LOW(r) XCMWINT (r, 0, CONST_DOUBLE, VOIDmode)
1115 #define CONST_DOUBLE_HIGH(r) XCMWINT (r, 1, CONST_DOUBLE, VOIDmode)
1116 #define CONST_DOUBLE_REAL_VALUE(r) \
1117   ((const struct real_value *) XCNMPRV (r, CONST_DOUBLE, VOIDmode))
1118
1119 #define CONST_FIXED_VALUE(r) \
1120   ((const struct fixed_value *) XCNMPFV (r, CONST_FIXED, VOIDmode))
1121 #define CONST_FIXED_VALUE_HIGH(r) \
1122   ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.high))
1123 #define CONST_FIXED_VALUE_LOW(r) \
1124   ((HOST_WIDE_INT) (CONST_FIXED_VALUE(r)->data.low))
1125
1126 /* For a CONST_VECTOR, return element #n.  */
1127 #define CONST_VECTOR_ELT(RTX, N) XCVECEXP (RTX, 0, N, CONST_VECTOR)
1128
1129 /* For a CONST_VECTOR, return the number of elements in a vector.  */
1130 #define CONST_VECTOR_NUNITS(RTX) XCVECLEN (RTX, 0, CONST_VECTOR)
1131
1132 /* For a SUBREG rtx, SUBREG_REG extracts the value we want a subreg of.
1133    SUBREG_BYTE extracts the byte-number.  */
1134
1135 #define SUBREG_REG(RTX) XCEXP (RTX, 0, SUBREG)
1136 #define SUBREG_BYTE(RTX) XCUINT (RTX, 1, SUBREG)
1137
1138 /* in rtlanal.c */
1139 /* Return the right cost to give to an operation
1140    to make the cost of the corresponding register-to-register instruction
1141    N times that of a fast register-to-register instruction.  */
1142 #define COSTS_N_INSNS(N) ((N) * 4)
1143
1144 /* Maximum cost of an rtl expression.  This value has the special meaning
1145    not to use an rtx with this cost under any circumstances.  */
1146 #define MAX_COST INT_MAX
1147
1148 /* A structure to hold all available cost information about an rtl
1149    expression.  */
1150 struct full_rtx_costs
1151 {
1152   int speed;
1153   int size;
1154 };
1155
1156 /* Initialize a full_rtx_costs structure C to the maximum cost.  */
1157 static inline void
1158 init_costs_to_max (struct full_rtx_costs *c)
1159 {
1160   c->speed = MAX_COST;
1161   c->size = MAX_COST;
1162 }
1163
1164 /* Initialize a full_rtx_costs structure C to zero cost.  */
1165 static inline void
1166 init_costs_to_zero (struct full_rtx_costs *c)
1167 {
1168   c->speed = 0;
1169   c->size = 0;
1170 }
1171
1172 /* Compare two full_rtx_costs structures A and B, returning true
1173    if A < B when optimizing for speed.  */
1174 static inline bool
1175 costs_lt_p (struct full_rtx_costs *a, struct full_rtx_costs *b,
1176             bool speed)
1177 {
1178   if (speed)
1179     return (a->speed < b->speed
1180             || (a->speed == b->speed && a->size < b->size));
1181   else
1182     return (a->size < b->size
1183             || (a->size == b->size && a->speed < b->speed));
1184 }
1185
1186 /* Increase both members of the full_rtx_costs structure C by the
1187    cost of N insns.  */
1188 static inline void
1189 costs_add_n_insns (struct full_rtx_costs *c, int n)
1190 {
1191   c->speed += COSTS_N_INSNS (n);
1192   c->size += COSTS_N_INSNS (n);
1193 }
1194
1195 extern void init_rtlanal (void);
1196 extern int rtx_cost (rtx, enum rtx_code, bool);
1197 extern int address_cost (rtx, enum machine_mode, addr_space_t, bool);
1198 extern void get_full_rtx_cost (rtx, enum rtx_code, struct full_rtx_costs *);
1199 extern unsigned int subreg_lsb (const_rtx);
1200 extern unsigned int subreg_lsb_1 (enum machine_mode, enum machine_mode,
1201                                   unsigned int);
1202 extern unsigned int subreg_regno_offset (unsigned int, enum machine_mode,
1203                                          unsigned int, enum machine_mode);
1204 extern bool subreg_offset_representable_p (unsigned int, enum machine_mode,
1205                                            unsigned int, enum machine_mode);
1206 extern unsigned int subreg_regno (const_rtx);
1207 extern int simplify_subreg_regno (unsigned int, enum machine_mode,
1208                                   unsigned int, enum machine_mode);
1209 extern unsigned int subreg_nregs (const_rtx);
1210 extern unsigned int subreg_nregs_with_regno (unsigned int, const_rtx);
1211 extern unsigned HOST_WIDE_INT nonzero_bits (const_rtx, enum machine_mode);
1212 extern unsigned int num_sign_bit_copies (const_rtx, enum machine_mode);
1213 extern bool constant_pool_constant_p (rtx);
1214 extern bool truncated_to_mode (enum machine_mode, const_rtx);
1215 extern int low_bitmask_len (enum machine_mode, unsigned HOST_WIDE_INT);
1216
1217
1218 /* 1 if RTX is a subreg containing a reg that is already known to be
1219    sign- or zero-extended from the mode of the subreg to the mode of
1220    the reg.  SUBREG_PROMOTED_UNSIGNED_P gives the signedness of the
1221    extension.
1222
1223    When used as a LHS, is means that this extension must be done
1224    when assigning to SUBREG_REG.  */
1225
1226 #define SUBREG_PROMOTED_VAR_P(RTX)                                      \
1227   (RTL_FLAG_CHECK1("SUBREG_PROMOTED", (RTX), SUBREG)->in_struct)
1228
1229 #define SUBREG_PROMOTED_UNSIGNED_SET(RTX, VAL)                          \
1230 do {                                                                    \
1231   rtx const _rtx = RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_SET", (RTX), SUBREG); \
1232   if ((VAL) < 0)                                                        \
1233     _rtx->volatil = 1;                                                  \
1234   else {                                                                \
1235     _rtx->volatil = 0;                                                  \
1236     _rtx->unchanging = (VAL);                                           \
1237   }                                                                     \
1238 } while (0)
1239
1240 /* Valid for subregs which are SUBREG_PROMOTED_VAR_P().  In that case
1241    this gives the necessary extensions:
1242    0  - signed
1243    1  - normal unsigned
1244    -1 - pointer unsigned, which most often can be handled like unsigned
1245         extension, except for generating instructions where we need to
1246         emit special code (ptr_extend insns) on some architectures.  */
1247
1248 #define SUBREG_PROMOTED_UNSIGNED_P(RTX) \
1249   ((RTL_FLAG_CHECK1("SUBREG_PROMOTED_UNSIGNED_P", (RTX), SUBREG)->volatil) \
1250    ? -1 : (int) (RTX)->unchanging)
1251
1252 /* Access various components of an ASM_OPERANDS rtx.  */
1253
1254 #define ASM_OPERANDS_TEMPLATE(RTX) XCSTR (RTX, 0, ASM_OPERANDS)
1255 #define ASM_OPERANDS_OUTPUT_CONSTRAINT(RTX) XCSTR (RTX, 1, ASM_OPERANDS)
1256 #define ASM_OPERANDS_OUTPUT_IDX(RTX) XCINT (RTX, 2, ASM_OPERANDS)
1257 #define ASM_OPERANDS_INPUT_VEC(RTX) XCVEC (RTX, 3, ASM_OPERANDS)
1258 #define ASM_OPERANDS_INPUT_CONSTRAINT_VEC(RTX) XCVEC (RTX, 4, ASM_OPERANDS)
1259 #define ASM_OPERANDS_INPUT(RTX, N) XCVECEXP (RTX, 3, N, ASM_OPERANDS)
1260 #define ASM_OPERANDS_INPUT_LENGTH(RTX) XCVECLEN (RTX, 3, ASM_OPERANDS)
1261 #define ASM_OPERANDS_INPUT_CONSTRAINT_EXP(RTX, N) \
1262   XCVECEXP (RTX, 4, N, ASM_OPERANDS)
1263 #define ASM_OPERANDS_INPUT_CONSTRAINT(RTX, N) \
1264   XSTR (XCVECEXP (RTX, 4, N, ASM_OPERANDS), 0)
1265 #define ASM_OPERANDS_INPUT_MODE(RTX, N)  \
1266   GET_MODE (XCVECEXP (RTX, 4, N, ASM_OPERANDS))
1267 #define ASM_OPERANDS_LABEL_VEC(RTX) XCVEC (RTX, 5, ASM_OPERANDS)
1268 #define ASM_OPERANDS_LABEL_LENGTH(RTX) XCVECLEN (RTX, 5, ASM_OPERANDS)
1269 #define ASM_OPERANDS_LABEL(RTX, N) XCVECEXP (RTX, 5, N, ASM_OPERANDS)
1270 #define ASM_OPERANDS_SOURCE_LOCATION(RTX) XCUINT (RTX, 6, ASM_OPERANDS)
1271 #define ASM_INPUT_SOURCE_LOCATION(RTX) XCUINT (RTX, 1, ASM_INPUT)
1272
1273 /* 1 if RTX is a mem that is statically allocated in read-only memory.  */
1274 #define MEM_READONLY_P(RTX) \
1275   (RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
1276
1277 /* 1 if RTX is a mem and we should keep the alias set for this mem
1278    unchanged when we access a component.  Set to 1, or example, when we
1279    are already in a non-addressable component of an aggregate.  */
1280 #define MEM_KEEP_ALIAS_SET_P(RTX)                                       \
1281   (RTL_FLAG_CHECK1("MEM_KEEP_ALIAS_SET_P", (RTX), MEM)->jump)
1282
1283 /* 1 if RTX is a mem or asm_operand for a volatile reference.  */
1284 #define MEM_VOLATILE_P(RTX)                                             \
1285   (RTL_FLAG_CHECK3("MEM_VOLATILE_P", (RTX), MEM, ASM_OPERANDS,          \
1286                    ASM_INPUT)->volatil)
1287
1288 /* 1 if RTX is a mem that refers to an aggregate, either to the
1289    aggregate itself or to a field of the aggregate.  If zero, RTX may
1290    or may not be such a reference.  */
1291 #define MEM_IN_STRUCT_P(RTX)                                            \
1292   (RTL_FLAG_CHECK1("MEM_IN_STRUCT_P", (RTX), MEM)->in_struct)
1293
1294 /* 1 if RTX is a MEM that refers to a scalar.  If zero, RTX may or may
1295    not refer to a scalar.  */
1296 #define MEM_SCALAR_P(RTX)                                               \
1297   (RTL_FLAG_CHECK1("MEM_SCALAR_P", (RTX), MEM)->return_val)
1298
1299 /* 1 if RTX is a mem that cannot trap.  */
1300 #define MEM_NOTRAP_P(RTX) \
1301   (RTL_FLAG_CHECK1("MEM_NOTRAP_P", (RTX), MEM)->call)
1302
1303 /* The memory attribute block.  We provide access macros for each value
1304    in the block and provide defaults if none specified.  */
1305 #define MEM_ATTRS(RTX) X0MEMATTR (RTX, 1)
1306
1307 /* The register attribute block.  We provide access macros for each value
1308    in the block and provide defaults if none specified.  */
1309 #define REG_ATTRS(RTX) X0REGATTR (RTX, 2)
1310
1311 #ifndef GENERATOR_FILE
1312 /* For a MEM rtx, the alias set.  If 0, this MEM is not in any alias
1313    set, and may alias anything.  Otherwise, the MEM can only alias
1314    MEMs in a conflicting alias set.  This value is set in a
1315    language-dependent manner in the front-end, and should not be
1316    altered in the back-end.  These set numbers are tested with
1317    alias_sets_conflict_p.  */
1318 #define MEM_ALIAS_SET(RTX) (get_mem_attrs (RTX)->alias)
1319
1320 /* For a MEM rtx, the decl it is known to refer to, if it is known to
1321    refer to part of a DECL.  It may also be a COMPONENT_REF.  */
1322 #define MEM_EXPR(RTX) (get_mem_attrs (RTX)->expr)
1323
1324 /* For a MEM rtx, true if its MEM_OFFSET is known.  */
1325 #define MEM_OFFSET_KNOWN_P(RTX) (get_mem_attrs (RTX)->offset_known_p)
1326
1327 /* For a MEM rtx, the offset from the start of MEM_EXPR.  */
1328 #define MEM_OFFSET(RTX) (get_mem_attrs (RTX)->offset)
1329
1330 /* For a MEM rtx, the address space.  */
1331 #define MEM_ADDR_SPACE(RTX) (get_mem_attrs (RTX)->addrspace)
1332
1333 /* For a MEM rtx, true if its MEM_SIZE is known.  */
1334 #define MEM_SIZE_KNOWN_P(RTX) (get_mem_attrs (RTX)->size_known_p)
1335
1336 /* For a MEM rtx, the size in bytes of the MEM.  */
1337 #define MEM_SIZE(RTX) (get_mem_attrs (RTX)->size)
1338
1339 /* For a MEM rtx, the alignment in bits.  We can use the alignment of the
1340    mode as a default when STRICT_ALIGNMENT, but not if not.  */
1341 #define MEM_ALIGN(RTX) (get_mem_attrs (RTX)->align)
1342 #else
1343 #define MEM_ADDR_SPACE(RTX) ADDR_SPACE_GENERIC
1344 #endif
1345
1346 /* For a REG rtx, the decl it is known to refer to, if it is known to
1347    refer to part of a DECL.  */
1348 #define REG_EXPR(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->decl)
1349
1350 /* For a REG rtx, the offset from the start of REG_EXPR, if known, as an
1351    HOST_WIDE_INT.  */
1352 #define REG_OFFSET(RTX) (REG_ATTRS (RTX) == 0 ? 0 : REG_ATTRS (RTX)->offset)
1353
1354 /* Copy the attributes that apply to memory locations from RHS to LHS.  */
1355 #define MEM_COPY_ATTRIBUTES(LHS, RHS)                           \
1356   (MEM_VOLATILE_P (LHS) = MEM_VOLATILE_P (RHS),                 \
1357    MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS),               \
1358    MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS),                     \
1359    MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS),                     \
1360    MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS),                 \
1361    MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS),     \
1362    MEM_POINTER (LHS) = MEM_POINTER (RHS),                       \
1363    MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
1364
1365 /* 1 if RTX is a label_ref for a nonlocal label.  */
1366 /* Likewise in an expr_list for a REG_LABEL_OPERAND or
1367    REG_LABEL_TARGET note.  */
1368 #define LABEL_REF_NONLOCAL_P(RTX)                                       \
1369   (RTL_FLAG_CHECK1("LABEL_REF_NONLOCAL_P", (RTX), LABEL_REF)->volatil)
1370
1371 /* 1 if RTX is a code_label that should always be considered to be needed.  */
1372 #define LABEL_PRESERVE_P(RTX)                                           \
1373   (RTL_FLAG_CHECK2("LABEL_PRESERVE_P", (RTX), CODE_LABEL, NOTE)->in_struct)
1374
1375 /* During sched, 1 if RTX is an insn that must be scheduled together
1376    with the preceding insn.  */
1377 #define SCHED_GROUP_P(RTX)                                              \
1378   (RTL_FLAG_CHECK4("SCHED_GROUP_P", (RTX), DEBUG_INSN, INSN,            \
1379                    JUMP_INSN, CALL_INSN                                 \
1380                    )->in_struct)
1381
1382 /* For a SET rtx, SET_DEST is the place that is set
1383    and SET_SRC is the value it is set to.  */
1384 #define SET_DEST(RTX) XC2EXP(RTX, 0, SET, CLOBBER)
1385 #define SET_SRC(RTX) XCEXP(RTX, 1, SET)
1386 #define SET_IS_RETURN_P(RTX)                                            \
1387   (RTL_FLAG_CHECK1("SET_IS_RETURN_P", (RTX), SET)->jump)
1388
1389 /* For a TRAP_IF rtx, TRAP_CONDITION is an expression.  */
1390 #define TRAP_CONDITION(RTX) XCEXP (RTX, 0, TRAP_IF)
1391 #define TRAP_CODE(RTX) XCEXP (RTX, 1, TRAP_IF)
1392
1393 /* For a COND_EXEC rtx, COND_EXEC_TEST is the condition to base
1394    conditionally executing the code on, COND_EXEC_CODE is the code
1395    to execute if the condition is true.  */
1396 #define COND_EXEC_TEST(RTX) XCEXP (RTX, 0, COND_EXEC)
1397 #define COND_EXEC_CODE(RTX) XCEXP (RTX, 1, COND_EXEC)
1398
1399 /* 1 if RTX is a symbol_ref that addresses this function's rtl
1400    constants pool.  */
1401 #define CONSTANT_POOL_ADDRESS_P(RTX)                                    \
1402   (RTL_FLAG_CHECK1("CONSTANT_POOL_ADDRESS_P", (RTX), SYMBOL_REF)->unchanging)
1403
1404 /* 1 if RTX is a symbol_ref that addresses a value in the file's
1405    tree constant pool.  This information is private to varasm.c.  */
1406 #define TREE_CONSTANT_POOL_ADDRESS_P(RTX)                               \
1407   (RTL_FLAG_CHECK1("TREE_CONSTANT_POOL_ADDRESS_P",                      \
1408                    (RTX), SYMBOL_REF)->frame_related)
1409
1410 /* Used if RTX is a symbol_ref, for machine-specific purposes.  */
1411 #define SYMBOL_REF_FLAG(RTX)                                            \
1412   (RTL_FLAG_CHECK1("SYMBOL_REF_FLAG", (RTX), SYMBOL_REF)->volatil)
1413
1414 /* 1 if RTX is a symbol_ref that has been the library function in
1415    emit_library_call.  */
1416 #define SYMBOL_REF_USED(RTX)                                            \
1417   (RTL_FLAG_CHECK1("SYMBOL_REF_USED", (RTX), SYMBOL_REF)->used)
1418
1419 /* 1 if RTX is a symbol_ref for a weak symbol.  */
1420 #define SYMBOL_REF_WEAK(RTX)                                            \
1421   (RTL_FLAG_CHECK1("SYMBOL_REF_WEAK", (RTX), SYMBOL_REF)->return_val)
1422
1423 /* A pointer attached to the SYMBOL_REF; either SYMBOL_REF_DECL or
1424    SYMBOL_REF_CONSTANT.  */
1425 #define SYMBOL_REF_DATA(RTX) X0ANY ((RTX), 2)
1426
1427 /* Set RTX's SYMBOL_REF_DECL to DECL.  RTX must not be a constant
1428    pool symbol.  */
1429 #define SET_SYMBOL_REF_DECL(RTX, DECL) \
1430   (gcc_assert (!CONSTANT_POOL_ADDRESS_P (RTX)), X0TREE ((RTX), 2) = (DECL))
1431
1432 /* The tree (decl or constant) associated with the symbol, or null.  */
1433 #define SYMBOL_REF_DECL(RTX) \
1434   (CONSTANT_POOL_ADDRESS_P (RTX) ? NULL : X0TREE ((RTX), 2))
1435
1436 /* Set RTX's SYMBOL_REF_CONSTANT to C.  RTX must be a constant pool symbol.  */
1437 #define SET_SYMBOL_REF_CONSTANT(RTX, C) \
1438   (gcc_assert (CONSTANT_POOL_ADDRESS_P (RTX)), X0CONSTANT ((RTX), 2) = (C))
1439
1440 /* The rtx constant pool entry for a symbol, or null.  */
1441 #define SYMBOL_REF_CONSTANT(RTX) \
1442   (CONSTANT_POOL_ADDRESS_P (RTX) ? X0CONSTANT ((RTX), 2) : NULL)
1443
1444 /* A set of flags on a symbol_ref that are, in some respects, redundant with
1445    information derivable from the tree decl associated with this symbol.
1446    Except that we build a *lot* of SYMBOL_REFs that aren't associated with a
1447    decl.  In some cases this is a bug.  But beyond that, it's nice to cache
1448    this information to avoid recomputing it.  Finally, this allows space for
1449    the target to store more than one bit of information, as with
1450    SYMBOL_REF_FLAG.  */
1451 #define SYMBOL_REF_FLAGS(RTX)   X0INT ((RTX), 1)
1452
1453 /* These flags are common enough to be defined for all targets.  They
1454    are computed by the default version of targetm.encode_section_info.  */
1455
1456 /* Set if this symbol is a function.  */
1457 #define SYMBOL_FLAG_FUNCTION    (1 << 0)
1458 #define SYMBOL_REF_FUNCTION_P(RTX) \
1459   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_FUNCTION) != 0)
1460 /* Set if targetm.binds_local_p is true.  */
1461 #define SYMBOL_FLAG_LOCAL       (1 << 1)
1462 #define SYMBOL_REF_LOCAL_P(RTX) \
1463   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_LOCAL) != 0)
1464 /* Set if targetm.in_small_data_p is true.  */
1465 #define SYMBOL_FLAG_SMALL       (1 << 2)
1466 #define SYMBOL_REF_SMALL_P(RTX) \
1467   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_SMALL) != 0)
1468 /* The three-bit field at [5:3] is true for TLS variables; use
1469    SYMBOL_REF_TLS_MODEL to extract the field as an enum tls_model.  */
1470 #define SYMBOL_FLAG_TLS_SHIFT   3
1471 #define SYMBOL_REF_TLS_MODEL(RTX) \
1472   ((enum tls_model) ((SYMBOL_REF_FLAGS (RTX) >> SYMBOL_FLAG_TLS_SHIFT) & 7))
1473 /* Set if this symbol is not defined in this translation unit.  */
1474 #define SYMBOL_FLAG_EXTERNAL    (1 << 6)
1475 #define SYMBOL_REF_EXTERNAL_P(RTX) \
1476   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_EXTERNAL) != 0)
1477 /* Set if this symbol has a block_symbol structure associated with it.  */
1478 #define SYMBOL_FLAG_HAS_BLOCK_INFO (1 << 7)
1479 #define SYMBOL_REF_HAS_BLOCK_INFO_P(RTX) \
1480   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_HAS_BLOCK_INFO) != 0)
1481 /* Set if this symbol is a section anchor.  SYMBOL_REF_ANCHOR_P implies
1482    SYMBOL_REF_HAS_BLOCK_INFO_P.  */
1483 #define SYMBOL_FLAG_ANCHOR      (1 << 8)
1484 #define SYMBOL_REF_ANCHOR_P(RTX) \
1485   ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_ANCHOR) != 0)
1486
1487 /* Subsequent bits are available for the target to use.  */
1488 #define SYMBOL_FLAG_MACH_DEP_SHIFT      9
1489 #define SYMBOL_FLAG_MACH_DEP            (1 << SYMBOL_FLAG_MACH_DEP_SHIFT)
1490
1491 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the object_block
1492    structure to which the symbol belongs, or NULL if it has not been
1493    assigned a block.  */
1494 #define SYMBOL_REF_BLOCK(RTX) (BLOCK_SYMBOL_CHECK (RTX)->block)
1495
1496 /* If SYMBOL_REF_HAS_BLOCK_INFO_P (RTX), this is the offset of RTX from
1497    the first object in SYMBOL_REF_BLOCK (RTX).  The value is negative if
1498    RTX has not yet been assigned to a block, or it has not been given an
1499    offset within that block.  */
1500 #define SYMBOL_REF_BLOCK_OFFSET(RTX) (BLOCK_SYMBOL_CHECK (RTX)->offset)
1501
1502 /* True if RTX is flagged to be a scheduling barrier.  */
1503 #define PREFETCH_SCHEDULE_BARRIER_P(RTX)                                        \
1504   (RTL_FLAG_CHECK1("PREFETCH_SCHEDULE_BARRIER_P", (RTX), PREFETCH)->volatil)
1505
1506 /* Indicate whether the machine has any sort of auto increment addressing.
1507    If not, we can avoid checking for REG_INC notes.  */
1508
1509 #if (defined (HAVE_PRE_INCREMENT) || defined (HAVE_PRE_DECREMENT) \
1510      || defined (HAVE_POST_INCREMENT) || defined (HAVE_POST_DECREMENT) \
1511      || defined (HAVE_PRE_MODIFY_DISP) || defined (HAVE_PRE_MODIFY_DISP) \
1512      || defined (HAVE_PRE_MODIFY_REG) || defined (HAVE_POST_MODIFY_REG))
1513 #define AUTO_INC_DEC
1514 #endif
1515
1516 /* Define a macro to look for REG_INC notes,
1517    but save time on machines where they never exist.  */
1518
1519 #ifdef AUTO_INC_DEC
1520 #define FIND_REG_INC_NOTE(INSN, REG)                    \
1521   ((REG) != NULL_RTX && REG_P ((REG))                   \
1522    ? find_regno_note ((INSN), REG_INC, REGNO (REG))     \
1523    : find_reg_note ((INSN), REG_INC, (REG)))
1524 #else
1525 #define FIND_REG_INC_NOTE(INSN, REG) 0
1526 #endif
1527
1528 #ifndef HAVE_PRE_INCREMENT
1529 #define HAVE_PRE_INCREMENT 0
1530 #endif
1531
1532 #ifndef HAVE_PRE_DECREMENT
1533 #define HAVE_PRE_DECREMENT 0
1534 #endif
1535
1536 #ifndef HAVE_POST_INCREMENT
1537 #define HAVE_POST_INCREMENT 0
1538 #endif
1539
1540 #ifndef HAVE_POST_DECREMENT
1541 #define HAVE_POST_DECREMENT 0
1542 #endif
1543
1544 #ifndef HAVE_POST_MODIFY_DISP
1545 #define HAVE_POST_MODIFY_DISP 0
1546 #endif
1547
1548 #ifndef HAVE_POST_MODIFY_REG
1549 #define HAVE_POST_MODIFY_REG 0
1550 #endif
1551
1552 #ifndef HAVE_PRE_MODIFY_DISP
1553 #define HAVE_PRE_MODIFY_DISP 0
1554 #endif
1555
1556 #ifndef HAVE_PRE_MODIFY_REG
1557 #define HAVE_PRE_MODIFY_REG 0
1558 #endif
1559
1560
1561 /* Some architectures do not have complete pre/post increment/decrement
1562    instruction sets, or only move some modes efficiently.  These macros
1563    allow us to tune autoincrement generation.  */
1564
1565 #ifndef USE_LOAD_POST_INCREMENT
1566 #define USE_LOAD_POST_INCREMENT(MODE)   HAVE_POST_INCREMENT
1567 #endif
1568
1569 #ifndef USE_LOAD_POST_DECREMENT
1570 #define USE_LOAD_POST_DECREMENT(MODE)   HAVE_POST_DECREMENT
1571 #endif
1572
1573 #ifndef USE_LOAD_PRE_INCREMENT
1574 #define USE_LOAD_PRE_INCREMENT(MODE)    HAVE_PRE_INCREMENT
1575 #endif
1576
1577 #ifndef USE_LOAD_PRE_DECREMENT
1578 #define USE_LOAD_PRE_DECREMENT(MODE)    HAVE_PRE_DECREMENT
1579 #endif
1580
1581 #ifndef USE_STORE_POST_INCREMENT
1582 #define USE_STORE_POST_INCREMENT(MODE)  HAVE_POST_INCREMENT
1583 #endif
1584
1585 #ifndef USE_STORE_POST_DECREMENT
1586 #define USE_STORE_POST_DECREMENT(MODE)  HAVE_POST_DECREMENT
1587 #endif
1588
1589 #ifndef USE_STORE_PRE_INCREMENT
1590 #define USE_STORE_PRE_INCREMENT(MODE)   HAVE_PRE_INCREMENT
1591 #endif
1592
1593 #ifndef USE_STORE_PRE_DECREMENT
1594 #define USE_STORE_PRE_DECREMENT(MODE)   HAVE_PRE_DECREMENT
1595 #endif
1596 \f
1597 /* Nonzero when we are generating CONCATs.  */
1598 extern int generating_concat_p;
1599
1600 /* Nonzero when we are expanding trees to RTL.  */
1601 extern int currently_expanding_to_rtl;
1602
1603 /* Generally useful functions.  */
1604
1605 /* In expmed.c */
1606 extern int ceil_log2 (unsigned HOST_WIDE_INT);
1607
1608 /* In explow.c */
1609 extern HOST_WIDE_INT trunc_int_for_mode (HOST_WIDE_INT, enum machine_mode);
1610 extern rtx plus_constant (rtx, HOST_WIDE_INT);
1611
1612 /* In rtl.c */
1613 extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
1614 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
1615
1616 extern rtvec rtvec_alloc (int);
1617 extern rtvec shallow_copy_rtvec (rtvec);
1618 extern bool shared_const_p (const_rtx);
1619 extern rtx copy_rtx (rtx);
1620 extern void dump_rtx_statistics (void);
1621
1622 /* In emit-rtl.c */
1623 extern rtx copy_rtx_if_shared (rtx);
1624
1625 /* In rtl.c */
1626 extern unsigned int rtx_size (const_rtx);
1627 extern rtx shallow_copy_rtx_stat (const_rtx MEM_STAT_DECL);
1628 #define shallow_copy_rtx(a) shallow_copy_rtx_stat (a MEM_STAT_INFO)
1629 extern int rtx_equal_p (const_rtx, const_rtx);
1630 extern hashval_t iterative_hash_rtx (const_rtx, hashval_t);
1631
1632 /* In emit-rtl.c */
1633 extern rtvec gen_rtvec_v (int, rtx *);
1634 extern rtx gen_reg_rtx (enum machine_mode);
1635 extern rtx gen_rtx_REG_offset (rtx, enum machine_mode, unsigned int, int);
1636 extern rtx gen_reg_rtx_offset (rtx, enum machine_mode, int);
1637 extern rtx gen_reg_rtx_and_attrs (rtx);
1638 extern rtx gen_label_rtx (void);
1639 extern rtx gen_lowpart_common (enum machine_mode, rtx);
1640
1641 /* In cse.c */
1642 extern rtx gen_lowpart_if_possible (enum machine_mode, rtx);
1643
1644 /* In emit-rtl.c */
1645 extern rtx gen_highpart (enum machine_mode, rtx);
1646 extern rtx gen_highpart_mode (enum machine_mode, enum machine_mode, rtx);
1647 extern rtx operand_subword (rtx, unsigned int, int, enum machine_mode);
1648
1649 /* In emit-rtl.c */
1650 extern rtx operand_subword_force (rtx, unsigned int, enum machine_mode);
1651 extern bool paradoxical_subreg_p (const_rtx);
1652 extern int subreg_lowpart_p (const_rtx);
1653 extern unsigned int subreg_lowpart_offset (enum machine_mode,
1654                                            enum machine_mode);
1655 extern unsigned int subreg_highpart_offset (enum machine_mode,
1656                                             enum machine_mode);
1657 extern int byte_lowpart_offset (enum machine_mode, enum machine_mode);
1658 extern rtx make_safe_from (rtx, rtx);
1659 extern rtx convert_memory_address_addr_space (enum machine_mode, rtx,
1660                                               addr_space_t);
1661 #define convert_memory_address(to_mode,x) \
1662         convert_memory_address_addr_space ((to_mode), (x), ADDR_SPACE_GENERIC)
1663 extern const char *get_insn_name (int);
1664 extern rtx get_last_insn_anywhere (void);
1665 extern rtx get_first_nonnote_insn (void);
1666 extern rtx get_last_nonnote_insn (void);
1667 extern void start_sequence (void);
1668 extern void push_to_sequence (rtx);
1669 extern void push_to_sequence2 (rtx, rtx);
1670 extern void end_sequence (void);
1671 extern double_int rtx_to_double_int (const_rtx);
1672 extern rtx immed_double_int_const (double_int, enum machine_mode);
1673 extern rtx immed_double_const (HOST_WIDE_INT, HOST_WIDE_INT,
1674                                enum machine_mode);
1675
1676 /* In loop-iv.c  */
1677
1678 extern rtx lowpart_subreg (enum machine_mode, rtx, enum machine_mode);
1679
1680 /* In varasm.c  */
1681 extern rtx force_const_mem (enum machine_mode, rtx);
1682
1683 /* In varasm.c  */
1684
1685 struct function;
1686 extern rtx get_pool_constant (rtx);
1687 extern rtx get_pool_constant_mark (rtx, bool *);
1688 extern enum machine_mode get_pool_mode (const_rtx);
1689 extern rtx simplify_subtraction (rtx);
1690 extern void decide_function_section (tree);
1691
1692 /* In function.c  */
1693 extern rtx assign_stack_local (enum machine_mode, HOST_WIDE_INT, int);
1694 #define ASLK_REDUCE_ALIGN 1
1695 #define ASLK_RECORD_PAD 2
1696 extern rtx assign_stack_local_1 (enum machine_mode, HOST_WIDE_INT, int, int);
1697 extern rtx assign_stack_temp (enum machine_mode, HOST_WIDE_INT, int);
1698 extern rtx assign_stack_temp_for_type (enum machine_mode,
1699                                        HOST_WIDE_INT, int, tree);
1700 extern rtx assign_temp (tree, int, int, int);
1701
1702 /* In emit-rtl.c */
1703 extern rtx emit_insn_before (rtx, rtx);
1704 extern rtx emit_insn_before_noloc (rtx, rtx, struct basic_block_def *);
1705 extern rtx emit_insn_before_setloc (rtx, rtx, int);
1706 extern rtx emit_jump_insn_before (rtx, rtx);
1707 extern rtx emit_jump_insn_before_noloc (rtx, rtx);
1708 extern rtx emit_jump_insn_before_setloc (rtx, rtx, int);
1709 extern rtx emit_call_insn_before (rtx, rtx);
1710 extern rtx emit_call_insn_before_noloc (rtx, rtx);
1711 extern rtx emit_call_insn_before_setloc (rtx, rtx, int);
1712 extern rtx emit_debug_insn_before (rtx, rtx);
1713 extern rtx emit_debug_insn_before_noloc (rtx, rtx);
1714 extern rtx emit_debug_insn_before_setloc (rtx, rtx, int);
1715 extern rtx emit_barrier_before (rtx);
1716 extern rtx emit_label_before (rtx, rtx);
1717 extern rtx emit_note_before (enum insn_note, rtx);
1718 extern rtx emit_insn_after (rtx, rtx);
1719 extern rtx emit_insn_after_noloc (rtx, rtx, struct basic_block_def *);
1720 extern rtx emit_insn_after_setloc (rtx, rtx, int);
1721 extern rtx emit_jump_insn_after (rtx, rtx);
1722 extern rtx emit_jump_insn_after_noloc (rtx, rtx);
1723 extern rtx emit_jump_insn_after_setloc (rtx, rtx, int);
1724 extern rtx emit_call_insn_after (rtx, rtx);
1725 extern rtx emit_call_insn_after_noloc (rtx, rtx);
1726 extern rtx emit_call_insn_after_setloc (rtx, rtx, int);
1727 extern rtx emit_debug_insn_after (rtx, rtx);
1728 extern rtx emit_debug_insn_after_noloc (rtx, rtx);
1729 extern rtx emit_debug_insn_after_setloc (rtx, rtx, int);
1730 extern rtx emit_barrier_after (rtx);
1731 extern rtx emit_label_after (rtx, rtx);
1732 extern rtx emit_note_after (enum insn_note, rtx);
1733 extern rtx emit_insn (rtx);
1734 extern rtx emit_debug_insn (rtx);
1735 extern rtx emit_jump_insn (rtx);
1736 extern rtx emit_call_insn (rtx);
1737 extern rtx emit_label (rtx);
1738 extern rtx emit_barrier (void);
1739 extern rtx emit_note (enum insn_note);
1740 extern rtx emit_note_copy (rtx);
1741 extern rtx gen_clobber (rtx);
1742 extern rtx emit_clobber (rtx);
1743 extern rtx gen_use (rtx);
1744 extern rtx emit_use (rtx);
1745 extern rtx make_insn_raw (rtx);
1746 extern rtx make_debug_insn_raw (rtx);
1747 extern rtx make_jump_insn_raw (rtx);
1748 extern void add_function_usage_to (rtx, rtx);
1749 extern rtx last_call_insn (void);
1750 extern rtx previous_insn (rtx);
1751 extern rtx next_insn (rtx);
1752 extern rtx prev_nonnote_insn (rtx);
1753 extern rtx prev_nonnote_insn_bb (rtx);
1754 extern rtx next_nonnote_insn (rtx);
1755 extern rtx next_nonnote_insn_bb (rtx);
1756 extern rtx prev_nondebug_insn (rtx);
1757 extern rtx next_nondebug_insn (rtx);
1758 extern rtx prev_nonnote_nondebug_insn (rtx);
1759 extern rtx next_nonnote_nondebug_insn (rtx);
1760 extern rtx prev_real_insn (rtx);
1761 extern rtx next_real_insn (rtx);
1762 extern rtx prev_active_insn (rtx);
1763 extern rtx next_active_insn (rtx);
1764 extern int active_insn_p (const_rtx);
1765 extern rtx prev_label (rtx);
1766 extern rtx next_label (rtx);
1767 extern rtx skip_consecutive_labels (rtx);
1768 extern rtx next_cc0_user (rtx);
1769 extern rtx prev_cc0_setter (rtx);
1770
1771 /* In cfglayout.c  */
1772 extern int insn_line (const_rtx);
1773 extern const char * insn_file (const_rtx);
1774 extern location_t locator_location (int);
1775 extern int locator_line (int);
1776 extern const char * locator_file (int);
1777 extern bool locator_eq (int, int);
1778 extern int prologue_locator, epilogue_locator;
1779
1780 /* In jump.c */
1781 extern enum rtx_code reverse_condition (enum rtx_code);
1782 extern enum rtx_code reverse_condition_maybe_unordered (enum rtx_code);
1783 extern enum rtx_code swap_condition (enum rtx_code);
1784 extern enum rtx_code unsigned_condition (enum rtx_code);
1785 extern enum rtx_code signed_condition (enum rtx_code);
1786 extern void mark_jump_label (rtx, rtx, int);
1787 extern unsigned int cleanup_barriers (void);
1788
1789 /* In jump.c */
1790 extern rtx delete_related_insns (rtx);
1791
1792 /* In recog.c  */
1793 extern rtx *find_constant_term_loc (rtx *);
1794
1795 /* In emit-rtl.c  */
1796 extern rtx try_split (rtx, rtx, int);
1797 extern int split_branch_probability;
1798
1799 /* In unknown file  */
1800 extern rtx split_insns (rtx, rtx);
1801
1802 /* In simplify-rtx.c  */
1803 extern rtx simplify_const_unary_operation (enum rtx_code, enum machine_mode,
1804                                            rtx, enum machine_mode);
1805 extern rtx simplify_unary_operation (enum rtx_code, enum machine_mode, rtx,
1806                                      enum machine_mode);
1807 extern rtx simplify_const_binary_operation (enum rtx_code, enum machine_mode,
1808                                             rtx, rtx);
1809 extern rtx simplify_binary_operation (enum rtx_code, enum machine_mode, rtx,
1810                                       rtx);
1811 extern rtx simplify_ternary_operation (enum rtx_code, enum machine_mode,
1812                                        enum machine_mode, rtx, rtx, rtx);
1813 extern rtx simplify_const_relational_operation (enum rtx_code,
1814                                                 enum machine_mode, rtx, rtx);
1815 extern rtx simplify_relational_operation (enum rtx_code, enum machine_mode,
1816                                           enum machine_mode, rtx, rtx);
1817 extern rtx simplify_gen_binary (enum rtx_code, enum machine_mode, rtx, rtx);
1818 extern rtx simplify_gen_unary (enum rtx_code, enum machine_mode, rtx,
1819                                enum machine_mode);
1820 extern rtx simplify_gen_ternary (enum rtx_code, enum machine_mode,
1821                                  enum machine_mode, rtx, rtx, rtx);
1822 extern rtx simplify_gen_relational (enum rtx_code, enum machine_mode,
1823                                     enum machine_mode, rtx, rtx);
1824 extern rtx simplify_subreg (enum machine_mode, rtx, enum machine_mode,
1825                             unsigned int);
1826 extern rtx simplify_gen_subreg (enum machine_mode, rtx, enum machine_mode,
1827                                 unsigned int);
1828 extern rtx simplify_replace_fn_rtx (rtx, const_rtx,
1829                                     rtx (*fn) (rtx, const_rtx, void *), void *);
1830 extern rtx simplify_replace_rtx (rtx, const_rtx, rtx);
1831 extern rtx simplify_rtx (const_rtx);
1832 extern rtx avoid_constant_pool_reference (rtx);
1833 extern rtx delegitimize_mem_from_attrs (rtx);
1834 extern bool mode_signbit_p (enum machine_mode, const_rtx);
1835 extern bool val_signbit_p (enum machine_mode, unsigned HOST_WIDE_INT);
1836 extern bool val_signbit_known_set_p (enum machine_mode,
1837                                      unsigned HOST_WIDE_INT);
1838 extern bool val_signbit_known_clear_p (enum machine_mode,
1839                                        unsigned HOST_WIDE_INT);
1840
1841 /* In reginfo.c  */
1842 extern enum machine_mode choose_hard_reg_mode (unsigned int, unsigned int,
1843                                                bool);
1844
1845 /* In emit-rtl.c  */
1846 extern rtx set_unique_reg_note (rtx, enum reg_note, rtx);
1847 extern void set_insn_deleted (rtx);
1848
1849 /* Functions in rtlanal.c */
1850
1851 /* Single set is implemented as macro for performance reasons.  */
1852 #define single_set(I) (INSN_P (I) \
1853                        ? (GET_CODE (PATTERN (I)) == SET \
1854                           ? PATTERN (I) : single_set_1 (I)) \
1855                        : NULL_RTX)
1856 #define single_set_1(I) single_set_2 (I, PATTERN (I))
1857
1858 /* Structure used for passing data to REPLACE_LABEL.  */
1859 typedef struct replace_label_data
1860 {
1861   rtx r1;
1862   rtx r2;
1863   bool update_label_nuses;
1864 } replace_label_data;
1865
1866 extern int rtx_addr_can_trap_p (const_rtx);
1867 extern bool nonzero_address_p (const_rtx);
1868 extern int rtx_unstable_p (const_rtx);
1869 extern bool rtx_varies_p (const_rtx, bool);
1870 extern bool rtx_addr_varies_p (const_rtx, bool);
1871 extern HOST_WIDE_INT get_integer_term (const_rtx);
1872 extern rtx get_related_value (const_rtx);
1873 extern bool offset_within_block_p (const_rtx, HOST_WIDE_INT);
1874 extern void split_const (rtx, rtx *, rtx *);
1875 extern int reg_mentioned_p (const_rtx, const_rtx);
1876 extern int count_occurrences (const_rtx, const_rtx, int);
1877 extern int reg_referenced_p (const_rtx, const_rtx);
1878 extern int reg_used_between_p (const_rtx, const_rtx, const_rtx);
1879 extern int reg_set_between_p (const_rtx, const_rtx, const_rtx);
1880 extern int commutative_operand_precedence (rtx);
1881 extern bool swap_commutative_operands_p (rtx, rtx);
1882 extern int modified_between_p (const_rtx, const_rtx, const_rtx);
1883 extern int no_labels_between_p (const_rtx, const_rtx);
1884 extern int modified_in_p (const_rtx, const_rtx);
1885 extern int reg_set_p (const_rtx, const_rtx);
1886 extern rtx single_set_2 (const_rtx, const_rtx);
1887 extern int multiple_sets (const_rtx);
1888 extern int set_noop_p (const_rtx);
1889 extern int noop_move_p (const_rtx);
1890 extern rtx find_last_value (rtx, rtx *, rtx, int);
1891 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
1892 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
1893 extern const_rtx set_of (const_rtx, const_rtx);
1894 extern void note_stores (const_rtx, void (*) (rtx, const_rtx, void *), void *);
1895 extern void note_uses (rtx *, void (*) (rtx *, void *), void *);
1896 extern int dead_or_set_p (const_rtx, const_rtx);
1897 extern int dead_or_set_regno_p (const_rtx, unsigned int);
1898 extern rtx find_reg_note (const_rtx, enum reg_note, const_rtx);
1899 extern rtx find_regno_note (const_rtx, enum reg_note, unsigned int);
1900 extern rtx find_reg_equal_equiv_note (const_rtx);
1901 extern rtx find_constant_src (const_rtx);
1902 extern int find_reg_fusage (const_rtx, enum rtx_code, const_rtx);
1903 extern int find_regno_fusage (const_rtx, enum rtx_code, unsigned int);
1904 extern rtx alloc_reg_note (enum reg_note, rtx, rtx);
1905 extern void add_reg_note (rtx, enum reg_note, rtx);
1906 extern void remove_note (rtx, const_rtx);
1907 extern void remove_reg_equal_equiv_notes (rtx);
1908 extern void remove_reg_equal_equiv_notes_for_regno (unsigned int);
1909 extern int side_effects_p (const_rtx);
1910 extern int volatile_refs_p (const_rtx);
1911 extern int volatile_insn_p (const_rtx);
1912 extern int may_trap_p_1 (const_rtx, unsigned);
1913 extern int may_trap_p (const_rtx);
1914 extern int may_trap_or_fault_p (const_rtx);
1915 extern bool can_throw_internal (const_rtx);
1916 extern bool can_throw_external (const_rtx);
1917 extern bool insn_could_throw_p (const_rtx);
1918 extern bool insn_nothrow_p (const_rtx);
1919 extern bool can_nonlocal_goto (const_rtx);
1920 extern void copy_reg_eh_region_note_forward (rtx, rtx, rtx);
1921 extern void copy_reg_eh_region_note_backward(rtx, rtx, rtx);
1922 extern int inequality_comparisons_p (const_rtx);
1923 extern rtx replace_rtx (rtx, rtx, rtx);
1924 extern int replace_label (rtx *, void *);
1925 extern int rtx_referenced_p (rtx, rtx);
1926 extern bool tablejump_p (const_rtx, rtx *, rtx *);
1927 extern int computed_jump_p (const_rtx);
1928
1929 typedef int (*rtx_function) (rtx *, void *);
1930 extern int for_each_rtx (rtx *, rtx_function, void *);
1931
1932 /* Callback for for_each_inc_dec, to process the autoinc operation OP
1933    within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is
1934    NULL.  The callback is passed the same opaque ARG passed to
1935    for_each_inc_dec.  Return zero to continue looking for other
1936    autoinc operations, -1 to skip OP's operands, and any other value
1937    to interrupt the traversal and return that value to the caller of
1938    for_each_inc_dec.  */
1939 typedef int (*for_each_inc_dec_fn) (rtx mem, rtx op, rtx dest, rtx src,
1940                                     rtx srcoff, void *arg);
1941 extern int for_each_inc_dec (rtx *, for_each_inc_dec_fn, void *arg);
1942
1943 typedef int (*rtx_equal_p_callback_function) (const_rtx *, const_rtx *,
1944                                               rtx *, rtx *);
1945 extern int rtx_equal_p_cb (const_rtx, const_rtx,
1946                            rtx_equal_p_callback_function);
1947
1948 typedef int (*hash_rtx_callback_function) (const_rtx, enum machine_mode, rtx *,
1949                                            enum machine_mode *);
1950 extern unsigned hash_rtx_cb (const_rtx, enum machine_mode, int *, int *,
1951                              bool, hash_rtx_callback_function);
1952
1953 extern rtx regno_use_in (unsigned int, rtx);
1954 extern int auto_inc_p (const_rtx);
1955 extern int in_expr_list_p (const_rtx, const_rtx);
1956 extern void remove_node_from_expr_list (const_rtx, rtx *);
1957 extern int loc_mentioned_in_p (rtx *, const_rtx);
1958 extern rtx find_first_parameter_load (rtx, rtx);
1959 extern bool keep_with_call_p (const_rtx);
1960 extern bool label_is_jump_target_p (const_rtx, const_rtx);
1961 extern int insn_rtx_cost (rtx, bool);
1962
1963 /* Given an insn and condition, return a canonical description of
1964    the test being made.  */
1965 extern rtx canonicalize_condition (rtx, rtx, int, rtx *, rtx, int, int);
1966
1967 /* Given a JUMP_INSN, return a canonical description of the test
1968    being made.  */
1969 extern rtx get_condition (rtx, rtx *, int, int);
1970
1971 /* Information about a subreg of a hard register.  */
1972 struct subreg_info
1973 {
1974   /* Offset of first hard register involved in the subreg.  */
1975   int offset;
1976   /* Number of hard registers involved in the subreg.  */
1977   int nregs;
1978   /* Whether this subreg can be represented as a hard reg with the new
1979      mode.  */
1980   bool representable_p;
1981 };
1982
1983 extern void subreg_get_info (unsigned int, enum machine_mode,
1984                              unsigned int, enum machine_mode,
1985                              struct subreg_info *);
1986
1987 /* lists.c */
1988
1989 extern void free_EXPR_LIST_list         (rtx *);
1990 extern void free_INSN_LIST_list         (rtx *);
1991 extern void free_EXPR_LIST_node         (rtx);
1992 extern void free_INSN_LIST_node         (rtx);
1993 extern rtx alloc_INSN_LIST                      (rtx, rtx);
1994 extern rtx alloc_EXPR_LIST                      (int, rtx, rtx);
1995 extern void remove_free_INSN_LIST_elem (rtx, rtx *);
1996 extern rtx remove_list_elem (rtx, rtx *);
1997 extern rtx remove_free_INSN_LIST_node (rtx *);
1998 extern rtx remove_free_EXPR_LIST_node (rtx *);
1999
2000
2001 /* reginfo.c */
2002
2003 /* Initialize may_move_cost and friends for mode M.  */
2004 extern void init_move_cost (enum machine_mode);
2005 /* Resize reg info.  */
2006 extern bool resize_reg_info (void);
2007 /* Free up register info memory.  */
2008 extern void free_reg_info (void);
2009 extern void init_subregs_of_mode (void);
2010 extern void finish_subregs_of_mode (void);
2011
2012 /* recog.c */
2013 extern rtx extract_asm_operands (rtx);
2014 extern int asm_noperands (const_rtx);
2015 extern const char *decode_asm_operands (rtx, rtx *, rtx **, const char **,
2016                                         enum machine_mode *, location_t *);
2017
2018 extern enum reg_class reg_preferred_class (int);
2019 extern enum reg_class reg_alternate_class (int);
2020 extern enum reg_class reg_allocno_class (int);
2021 extern void setup_reg_classes (int, enum reg_class, enum reg_class,
2022                                enum reg_class);
2023
2024 extern void split_all_insns (void);
2025 extern unsigned int split_all_insns_noflow (void);
2026
2027 #define MAX_SAVED_CONST_INT 64
2028 extern GTY(()) rtx const_int_rtx[MAX_SAVED_CONST_INT * 2 + 1];
2029
2030 #define const0_rtx      (const_int_rtx[MAX_SAVED_CONST_INT])
2031 #define const1_rtx      (const_int_rtx[MAX_SAVED_CONST_INT+1])
2032 #define const2_rtx      (const_int_rtx[MAX_SAVED_CONST_INT+2])
2033 #define constm1_rtx     (const_int_rtx[MAX_SAVED_CONST_INT-1])
2034 extern GTY(()) rtx const_true_rtx;
2035
2036 extern GTY(()) rtx const_tiny_rtx[3][(int) MAX_MACHINE_MODE];
2037
2038 /* Returns a constant 0 rtx in mode MODE.  Integer modes are treated the
2039    same as VOIDmode.  */
2040
2041 #define CONST0_RTX(MODE) (const_tiny_rtx[0][(int) (MODE)])
2042
2043 /* Likewise, for the constants 1 and 2.  */
2044
2045 #define CONST1_RTX(MODE) (const_tiny_rtx[1][(int) (MODE)])
2046 #define CONST2_RTX(MODE) (const_tiny_rtx[2][(int) (MODE)])
2047
2048 /* If HARD_FRAME_POINTER_REGNUM is defined, then a special dummy reg
2049    is used to represent the frame pointer.  This is because the
2050    hard frame pointer and the automatic variables are separated by an amount
2051    that cannot be determined until after register allocation.  We can assume
2052    that in this case ELIMINABLE_REGS will be defined, one action of which
2053    will be to eliminate FRAME_POINTER_REGNUM into HARD_FRAME_POINTER_REGNUM.  */
2054 #ifndef HARD_FRAME_POINTER_REGNUM
2055 #define HARD_FRAME_POINTER_REGNUM FRAME_POINTER_REGNUM
2056 #endif
2057
2058 #ifndef HARD_FRAME_POINTER_IS_FRAME_POINTER
2059 #define HARD_FRAME_POINTER_IS_FRAME_POINTER \
2060   (HARD_FRAME_POINTER_REGNUM == FRAME_POINTER_REGNUM)
2061 #endif
2062
2063 #ifndef HARD_FRAME_POINTER_IS_ARG_POINTER
2064 #define HARD_FRAME_POINTER_IS_ARG_POINTER \
2065   (HARD_FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM)
2066 #endif
2067
2068 /* Index labels for global_rtl.  */
2069 enum global_rtl_index
2070 {
2071   GR_PC,
2072   GR_CC0,
2073   GR_RETURN,
2074   GR_STACK_POINTER,
2075   GR_FRAME_POINTER,
2076 /* For register elimination to work properly these hard_frame_pointer_rtx,
2077    frame_pointer_rtx, and arg_pointer_rtx must be the same if they refer to
2078    the same register.  */
2079 #if FRAME_POINTER_REGNUM == ARG_POINTER_REGNUM
2080   GR_ARG_POINTER = GR_FRAME_POINTER,
2081 #endif
2082 #if HARD_FRAME_POINTER_IS_FRAME_POINTER
2083   GR_HARD_FRAME_POINTER = GR_FRAME_POINTER,
2084 #else
2085   GR_HARD_FRAME_POINTER,
2086 #endif
2087 #if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
2088 #if HARD_FRAME_POINTER_IS_ARG_POINTER
2089   GR_ARG_POINTER = GR_HARD_FRAME_POINTER,
2090 #else
2091   GR_ARG_POINTER,
2092 #endif
2093 #endif
2094   GR_VIRTUAL_INCOMING_ARGS,
2095   GR_VIRTUAL_STACK_ARGS,
2096   GR_VIRTUAL_STACK_DYNAMIC,
2097   GR_VIRTUAL_OUTGOING_ARGS,
2098   GR_VIRTUAL_CFA,
2099   GR_VIRTUAL_PREFERRED_STACK_BOUNDARY,
2100
2101   GR_MAX
2102 };
2103
2104 /* Target-dependent globals.  */
2105 struct GTY(()) target_rtl {
2106   /* All references to the hard registers in global_rtl_index go through
2107      these unique rtl objects.  On machines where the frame-pointer and
2108      arg-pointer are the same register, they use the same unique object.
2109
2110      After register allocation, other rtl objects which used to be pseudo-regs
2111      may be clobbered to refer to the frame-pointer register.
2112      But references that were originally to the frame-pointer can be
2113      distinguished from the others because they contain frame_pointer_rtx.
2114
2115      When to use frame_pointer_rtx and hard_frame_pointer_rtx is a little
2116      tricky: until register elimination has taken place hard_frame_pointer_rtx
2117      should be used if it is being set, and frame_pointer_rtx otherwise.  After
2118      register elimination hard_frame_pointer_rtx should always be used.
2119      On machines where the two registers are same (most) then these are the
2120      same.  */
2121   rtx x_global_rtl[GR_MAX];
2122
2123   /* A unique representation of (REG:Pmode PIC_OFFSET_TABLE_REGNUM).  */
2124   rtx x_pic_offset_table_rtx;
2125
2126   /* A unique representation of (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM).
2127      This is used to implement __builtin_return_address for some machines;
2128      see for instance the MIPS port.  */
2129   rtx x_return_address_pointer_rtx;
2130
2131   /* Commonly used RTL for hard registers.  These objects are not
2132      necessarily unique, so we allocate them separately from global_rtl.
2133      They are initialized once per compilation unit, then copied into
2134      regno_reg_rtx at the beginning of each function.  */
2135   rtx x_initial_regno_reg_rtx[FIRST_PSEUDO_REGISTER];
2136
2137   /* A sample (mem:M stack_pointer_rtx) rtx for each mode M.  */
2138   rtx x_top_of_stack[MAX_MACHINE_MODE];
2139
2140   /* Static hunks of RTL used by the aliasing code; these are treated
2141      as persistent to avoid unnecessary RTL allocations.  */
2142   rtx x_static_reg_base_value[FIRST_PSEUDO_REGISTER];
2143
2144   /* The default memory attributes for each mode.  */
2145   struct mem_attrs *x_mode_mem_attrs[(int) MAX_MACHINE_MODE];
2146 };
2147
2148 extern GTY(()) struct target_rtl default_target_rtl;
2149 #if SWITCHABLE_TARGET
2150 extern struct target_rtl *this_target_rtl;
2151 #else
2152 #define this_target_rtl (&default_target_rtl)
2153 #endif
2154
2155 #define global_rtl                              \
2156   (this_target_rtl->x_global_rtl)
2157 #define pic_offset_table_rtx \
2158   (this_target_rtl->x_pic_offset_table_rtx)
2159 #define return_address_pointer_rtx \
2160   (this_target_rtl->x_return_address_pointer_rtx)
2161 #define top_of_stack \
2162   (this_target_rtl->x_top_of_stack)
2163 #define mode_mem_attrs \
2164   (this_target_rtl->x_mode_mem_attrs)
2165
2166 /* Standard pieces of rtx, to be substituted directly into things.  */
2167 #define pc_rtx                  (global_rtl[GR_PC])
2168 #define ret_rtx                 (global_rtl[GR_RETURN])
2169 #define cc0_rtx                 (global_rtl[GR_CC0])
2170
2171 /* All references to certain hard regs, except those created
2172    by allocating pseudo regs into them (when that's possible),
2173    go through these unique rtx objects.  */
2174 #define stack_pointer_rtx       (global_rtl[GR_STACK_POINTER])
2175 #define frame_pointer_rtx       (global_rtl[GR_FRAME_POINTER])
2176 #define hard_frame_pointer_rtx  (global_rtl[GR_HARD_FRAME_POINTER])
2177 #define arg_pointer_rtx         (global_rtl[GR_ARG_POINTER])
2178
2179 #ifndef GENERATOR_FILE
2180 /* Return the attributes of a MEM rtx.  */
2181 static inline struct mem_attrs *
2182 get_mem_attrs (const_rtx x)
2183 {
2184   struct mem_attrs *attrs;
2185
2186   attrs = MEM_ATTRS (x);
2187   if (!attrs)
2188     attrs = mode_mem_attrs[(int) GET_MODE (x)];
2189   return attrs;
2190 }
2191 #endif
2192
2193 /* Include the RTL generation functions.  */
2194
2195 #ifndef GENERATOR_FILE
2196 #include "genrtl.h"
2197 #undef gen_rtx_ASM_INPUT
2198 #define gen_rtx_ASM_INPUT(MODE, ARG0)                           \
2199   gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), 0)
2200 #define gen_rtx_ASM_INPUT_loc(MODE, ARG0, LOC)                  \
2201   gen_rtx_fmt_si (ASM_INPUT, (MODE), (ARG0), (LOC))
2202 #endif
2203
2204 /* There are some RTL codes that require special attention; the
2205    generation functions included above do the raw handling.  If you
2206    add to this list, modify special_rtx in gengenrtl.c as well.  */
2207
2208 extern rtx gen_rtx_CONST_INT (enum machine_mode, HOST_WIDE_INT);
2209 extern rtx gen_rtx_CONST_VECTOR (enum machine_mode, rtvec);
2210 extern rtx gen_raw_REG (enum machine_mode, int);
2211 extern rtx gen_rtx_REG (enum machine_mode, unsigned);
2212 extern rtx gen_rtx_SUBREG (enum machine_mode, rtx, int);
2213 extern rtx gen_rtx_MEM (enum machine_mode, rtx);
2214
2215 #define GEN_INT(N)  gen_rtx_CONST_INT (VOIDmode, (N))
2216
2217 /* Virtual registers are used during RTL generation to refer to locations into
2218    the stack frame when the actual location isn't known until RTL generation
2219    is complete.  The routine instantiate_virtual_regs replaces these with
2220    the proper value, which is normally {frame,arg,stack}_pointer_rtx plus
2221    a constant.  */
2222
2223 #define FIRST_VIRTUAL_REGISTER  (FIRST_PSEUDO_REGISTER)
2224
2225 /* This points to the first word of the incoming arguments passed on the stack,
2226    either by the caller or by the callee when pretending it was passed by the
2227    caller.  */
2228
2229 #define virtual_incoming_args_rtx       (global_rtl[GR_VIRTUAL_INCOMING_ARGS])
2230
2231 #define VIRTUAL_INCOMING_ARGS_REGNUM    (FIRST_VIRTUAL_REGISTER)
2232
2233 /* If FRAME_GROWS_DOWNWARD, this points to immediately above the first
2234    variable on the stack.  Otherwise, it points to the first variable on
2235    the stack.  */
2236
2237 #define virtual_stack_vars_rtx          (global_rtl[GR_VIRTUAL_STACK_ARGS])
2238
2239 #define VIRTUAL_STACK_VARS_REGNUM       ((FIRST_VIRTUAL_REGISTER) + 1)
2240
2241 /* This points to the location of dynamically-allocated memory on the stack
2242    immediately after the stack pointer has been adjusted by the amount
2243    desired.  */
2244
2245 #define virtual_stack_dynamic_rtx       (global_rtl[GR_VIRTUAL_STACK_DYNAMIC])
2246
2247 #define VIRTUAL_STACK_DYNAMIC_REGNUM    ((FIRST_VIRTUAL_REGISTER) + 2)
2248
2249 /* This points to the location in the stack at which outgoing arguments should
2250    be written when the stack is pre-pushed (arguments pushed using push
2251    insns always use sp).  */
2252
2253 #define virtual_outgoing_args_rtx       (global_rtl[GR_VIRTUAL_OUTGOING_ARGS])
2254
2255 #define VIRTUAL_OUTGOING_ARGS_REGNUM    ((FIRST_VIRTUAL_REGISTER) + 3)
2256
2257 /* This points to the Canonical Frame Address of the function.  This
2258    should correspond to the CFA produced by INCOMING_FRAME_SP_OFFSET,
2259    but is calculated relative to the arg pointer for simplicity; the
2260    frame pointer nor stack pointer are necessarily fixed relative to
2261    the CFA until after reload.  */
2262
2263 #define virtual_cfa_rtx                 (global_rtl[GR_VIRTUAL_CFA])
2264
2265 #define VIRTUAL_CFA_REGNUM              ((FIRST_VIRTUAL_REGISTER) + 4)
2266
2267 #define LAST_VIRTUAL_POINTER_REGISTER   ((FIRST_VIRTUAL_REGISTER) + 4)
2268
2269 /* This is replaced by crtl->preferred_stack_boundary / BITS_PER_UNIT
2270    when finalized.  */
2271
2272 #define virtual_preferred_stack_boundary_rtx \
2273         (global_rtl[GR_VIRTUAL_PREFERRED_STACK_BOUNDARY])
2274
2275 #define VIRTUAL_PREFERRED_STACK_BOUNDARY_REGNUM \
2276                                         ((FIRST_VIRTUAL_REGISTER) + 5)
2277
2278 #define LAST_VIRTUAL_REGISTER           ((FIRST_VIRTUAL_REGISTER) + 5)
2279
2280 /* Nonzero if REGNUM is a pointer into the stack frame.  */
2281 #define REGNO_PTR_FRAME_P(REGNUM)               \
2282   ((REGNUM) == STACK_POINTER_REGNUM             \
2283    || (REGNUM) == FRAME_POINTER_REGNUM          \
2284    || (REGNUM) == HARD_FRAME_POINTER_REGNUM     \
2285    || (REGNUM) == ARG_POINTER_REGNUM            \
2286    || ((REGNUM) >= FIRST_VIRTUAL_REGISTER       \
2287        && (REGNUM) <= LAST_VIRTUAL_POINTER_REGISTER))
2288
2289 /* REGNUM never really appearing in the INSN stream.  */
2290 #define INVALID_REGNUM                  (~(unsigned int) 0)
2291
2292 extern rtx output_constant_def (tree, int);
2293 extern rtx lookup_constant_def (tree);
2294
2295 /* Nonzero after end of reload pass.
2296    Set to 1 or 0 by reload1.c.  */
2297
2298 extern int reload_completed;
2299
2300 /* Nonzero after thread_prologue_and_epilogue_insns has run.  */
2301 extern int epilogue_completed;
2302
2303 /* Set to 1 while reload_as_needed is operating.
2304    Required by some machines to handle any generated moves differently.  */
2305
2306 extern int reload_in_progress;
2307
2308 /* This macro indicates whether you may create a new
2309    pseudo-register.  */
2310
2311 #define can_create_pseudo_p() (!reload_in_progress && !reload_completed)
2312
2313 #ifdef STACK_REGS
2314 /* Nonzero after end of regstack pass.
2315    Set to 1 or 0 by reg-stack.c.  */
2316 extern int regstack_completed;
2317 #endif
2318
2319 /* If this is nonzero, we do not bother generating VOLATILE
2320    around volatile memory references, and we are willing to
2321    output indirect addresses.  If cse is to follow, we reject
2322    indirect addresses so a useful potential cse is generated;
2323    if it is used only once, instruction combination will produce
2324    the same indirect address eventually.  */
2325 extern int cse_not_expected;
2326
2327 /* Translates rtx code to tree code, for those codes needed by
2328    REAL_ARITHMETIC.  The function returns an int because the caller may not
2329    know what `enum tree_code' means.  */
2330
2331 extern int rtx_to_tree_code (enum rtx_code);
2332
2333 /* In cse.c */
2334 extern int delete_trivially_dead_insns (rtx, int);
2335 extern int cse_main (rtx, int);
2336 extern int exp_equiv_p (const_rtx, const_rtx, int, bool);
2337 extern unsigned hash_rtx (const_rtx x, enum machine_mode, int *, int *, bool);
2338
2339 /* In dse.c */
2340 extern void check_for_inc_dec (rtx insn);
2341
2342 /* In jump.c */
2343 extern int comparison_dominates_p (enum rtx_code, enum rtx_code);
2344 extern int condjump_p (const_rtx);
2345 extern int any_condjump_p (const_rtx);
2346 extern int any_uncondjump_p (const_rtx);
2347 extern rtx pc_set (const_rtx);
2348 extern rtx condjump_label (const_rtx);
2349 extern int simplejump_p (const_rtx);
2350 extern int returnjump_p (rtx);
2351 extern int eh_returnjump_p (rtx);
2352 extern int onlyjump_p (const_rtx);
2353 extern int only_sets_cc0_p (const_rtx);
2354 extern int sets_cc0_p (const_rtx);
2355 extern int invert_jump_1 (rtx, rtx);
2356 extern int invert_jump (rtx, rtx, int);
2357 extern int rtx_renumbered_equal_p (const_rtx, const_rtx);
2358 extern int true_regnum (const_rtx);
2359 extern unsigned int reg_or_subregno (const_rtx);
2360 extern int redirect_jump_1 (rtx, rtx);
2361 extern void redirect_jump_2 (rtx, rtx, rtx, int, int);
2362 extern int redirect_jump (rtx, rtx, int);
2363 extern void rebuild_jump_labels (rtx);
2364 extern void rebuild_jump_labels_chain (rtx);
2365 extern rtx reversed_comparison (const_rtx, enum machine_mode);
2366 extern enum rtx_code reversed_comparison_code (const_rtx, const_rtx);
2367 extern enum rtx_code reversed_comparison_code_parts (enum rtx_code, const_rtx,
2368                                                      const_rtx, const_rtx);
2369 extern void delete_for_peephole (rtx, rtx);
2370 extern int condjump_in_parallel_p (const_rtx);
2371
2372 /* In emit-rtl.c.  */
2373 extern int max_reg_num (void);
2374 extern int max_label_num (void);
2375 extern int get_first_label_num (void);
2376 extern void maybe_set_first_label_num (rtx);
2377 extern void delete_insns_since (rtx);
2378 extern void mark_reg_pointer (rtx, int);
2379 extern void mark_user_reg (rtx);
2380 extern void reset_used_flags (rtx);
2381 extern void set_used_flags (rtx);
2382 extern void reorder_insns (rtx, rtx, rtx);
2383 extern void reorder_insns_nobb (rtx, rtx, rtx);
2384 extern int get_max_insn_count (void);
2385 extern int in_sequence_p (void);
2386 extern void force_next_line_note (void);
2387 extern void init_emit (void);
2388 extern void init_emit_regs (void);
2389 extern void init_emit_once (void);
2390 extern void push_topmost_sequence (void);
2391 extern void pop_topmost_sequence (void);
2392 extern void set_new_first_and_last_insn (rtx, rtx);
2393 extern unsigned int unshare_all_rtl (void);
2394 extern void unshare_all_rtl_again (rtx);
2395 extern void unshare_all_rtl_in_chain (rtx);
2396 extern void verify_rtl_sharing (void);
2397 extern void link_cc0_insns (rtx);
2398 extern void add_insn (rtx);
2399 extern void add_insn_before (rtx, rtx, struct basic_block_def *);
2400 extern void add_insn_after (rtx, rtx, struct basic_block_def *);
2401 extern void remove_insn (rtx);
2402 extern rtx emit (rtx);
2403 extern rtx delete_insn (rtx);
2404 extern rtx entry_of_function (void);
2405 extern void emit_insn_at_entry (rtx);
2406 extern void delete_insn_chain (rtx, rtx, bool);
2407 extern rtx unlink_insn_chain (rtx, rtx);
2408 extern rtx delete_insn_and_edges (rtx);
2409 extern rtx gen_lowpart_SUBREG (enum machine_mode, rtx);
2410 extern rtx gen_const_mem (enum machine_mode, rtx);
2411 extern rtx gen_frame_mem (enum machine_mode, rtx);
2412 extern rtx gen_tmp_stack_mem (enum machine_mode, rtx);
2413 extern bool validate_subreg (enum machine_mode, enum machine_mode,
2414                              const_rtx, unsigned int);
2415
2416 /* In combine.c  */
2417 extern unsigned int extended_count (const_rtx, enum machine_mode, int);
2418 extern rtx remove_death (unsigned int, rtx);
2419 extern void dump_combine_stats (FILE *);
2420 extern void dump_combine_total_stats (FILE *);
2421
2422 /* In cfgcleanup.c  */
2423 extern void delete_dead_jumptables (void);
2424
2425 /* In sched-vis.c.  */
2426 extern void debug_bb_n_slim (int);
2427 extern void debug_bb_slim (struct basic_block_def *);
2428 extern void print_rtl_slim (FILE *, rtx, rtx, int, int);
2429 extern void print_rtl_slim_with_bb (FILE *, rtx, int);
2430 extern void dump_insn_slim (FILE *f, rtx x);
2431 extern void debug_insn_slim (rtx x);
2432
2433 /* In sched-rgn.c.  */
2434 extern void schedule_insns (void);
2435
2436 /* In sched-ebb.c.  */
2437 extern void schedule_ebbs (void);
2438
2439 /* In sel-sched-dump.c.  */
2440 extern void sel_sched_fix_param (const char *param, const char *val);
2441
2442 /* In print-rtl.c */
2443 extern const char *print_rtx_head;
2444 extern void debug_rtx (const_rtx);
2445 extern void debug_rtx_list (const_rtx, int);
2446 extern void debug_rtx_range (const_rtx, const_rtx);
2447 extern const_rtx debug_rtx_find (const_rtx, int);
2448 extern void print_mem_expr (FILE *, const_tree);
2449 extern void print_rtl (FILE *, const_rtx);
2450 extern void print_simple_rtl (FILE *, const_rtx);
2451 extern int print_rtl_single (FILE *, const_rtx);
2452 extern void print_inline_rtx (FILE *, const_rtx, int);
2453
2454 /* In function.c */
2455 extern void reposition_prologue_and_epilogue_notes (void);
2456 extern int prologue_epilogue_contains (const_rtx);
2457 extern int sibcall_epilogue_contains (const_rtx);
2458 extern void mark_temp_addr_taken (rtx);
2459 extern void update_temp_slot_address (rtx, rtx);
2460 extern void maybe_copy_prologue_epilogue_insn (rtx, rtx);
2461
2462 /* In stmt.c */
2463 extern void expand_null_return (void);
2464 extern void expand_naked_return (void);
2465 extern void emit_jump (rtx);
2466
2467 /* In expr.c */
2468 extern rtx move_by_pieces (rtx, rtx, unsigned HOST_WIDE_INT,
2469                            unsigned int, int);
2470
2471 /* In cfgrtl.c */
2472 extern void print_rtl_with_bb (FILE *, const_rtx);
2473
2474 /* In cfg.c.  */
2475 extern void dump_reg_info (FILE *);
2476 extern void dump_flow_info (FILE *, int);
2477
2478 /* In expmed.c */
2479 extern void init_expmed (void);
2480 extern void expand_inc (rtx, rtx);
2481 extern void expand_dec (rtx, rtx);
2482
2483 /* In gcse.c */
2484 extern bool can_copy_p (enum machine_mode);
2485 extern bool can_assign_to_reg_without_clobbers_p (rtx);
2486 extern rtx fis_get_condition (rtx);
2487
2488 /* In ira.c */
2489 #ifdef HARD_CONST
2490 extern HARD_REG_SET eliminable_regset;
2491 #endif
2492 extern void mark_elimination (int, int);
2493
2494 /* In reginfo.c */
2495 extern int reg_classes_intersect_p (reg_class_t, reg_class_t);
2496 extern int reg_class_subset_p (reg_class_t, reg_class_t);
2497 extern void globalize_reg (tree, int);
2498 extern void init_reg_modes_target (void);
2499 extern void init_regs (void);
2500 extern void reinit_regs (void);
2501 extern void init_fake_stack_mems (void);
2502 extern void save_register_info (void);
2503 extern void init_reg_sets (void);
2504 extern void regclass (rtx, int);
2505 extern void reg_scan (rtx, unsigned int);
2506 extern void fix_register (const char *, int, int);
2507 extern bool invalid_mode_change_p (unsigned int, enum reg_class);
2508
2509 /* In reorg.c */
2510 extern void dbr_schedule (rtx);
2511
2512 /* In reload1.c */
2513 extern int function_invariant_p (const_rtx);
2514
2515 /* In calls.c */
2516 enum libcall_type
2517 {
2518   LCT_NORMAL = 0,
2519   LCT_CONST = 1,
2520   LCT_PURE = 2,
2521   LCT_NORETURN = 3,
2522   LCT_THROW = 4,
2523   LCT_RETURNS_TWICE = 5
2524 };
2525
2526 extern void emit_library_call (rtx, enum libcall_type, enum machine_mode, int,
2527                                ...);
2528 extern rtx emit_library_call_value (rtx, rtx, enum libcall_type,
2529                                     enum machine_mode, int, ...);
2530
2531 /* In varasm.c */
2532 extern void init_varasm_once (void);
2533
2534 extern rtx make_debug_expr_from_rtl (const_rtx);
2535
2536 /* In read-rtl.c */
2537 extern bool read_rtx (const char *, rtx *);
2538
2539 /* In alias.c */
2540 extern rtx canon_rtx (rtx);
2541 extern int true_dependence (const_rtx, enum machine_mode, const_rtx, bool (*)(const_rtx, bool));
2542 extern rtx get_addr (rtx);
2543 extern int canon_true_dependence (const_rtx, enum machine_mode, rtx, const_rtx,
2544                                   rtx, bool (*)(const_rtx, bool));
2545 extern int read_dependence (const_rtx, const_rtx);
2546 extern int anti_dependence (const_rtx, const_rtx);
2547 extern int output_dependence (const_rtx, const_rtx);
2548 extern int may_alias_p (const_rtx, const_rtx);
2549 extern void init_alias_target (void);
2550 extern void init_alias_analysis (void);
2551 extern void end_alias_analysis (void);
2552 extern void vt_equate_reg_base_value (const_rtx, const_rtx);
2553 extern bool memory_modified_in_insn_p (const_rtx, const_rtx);
2554 extern rtx find_base_term (rtx);
2555 extern rtx gen_hard_reg_clobber (enum machine_mode, unsigned int);
2556 extern rtx get_reg_known_value (unsigned int);
2557 extern bool get_reg_known_equiv_p (unsigned int);
2558 extern rtx get_reg_base_value (unsigned int);
2559
2560 #ifdef STACK_REGS
2561 extern int stack_regs_mentioned (const_rtx insn);
2562 #endif
2563
2564 /* In toplev.c */
2565 extern GTY(()) rtx stack_limit_rtx;
2566
2567 /* In predict.c */
2568 extern void invert_br_probabilities (rtx);
2569 extern bool expensive_function_p (int);
2570
2571 /* In var-tracking.c */
2572 extern unsigned int variable_tracking_main (void);
2573
2574 /* In stor-layout.c.  */
2575 extern void get_mode_bounds (enum machine_mode, int, enum machine_mode,
2576                              rtx *, rtx *);
2577
2578 /* In loop-unswitch.c  */
2579 extern rtx reversed_condition (rtx);
2580 extern rtx compare_and_jump_seq (rtx, rtx, enum rtx_code, rtx, int, rtx);
2581
2582 /* In loop-iv.c  */
2583 extern rtx canon_condition (rtx);
2584 extern void simplify_using_condition (rtx, rtx *, struct bitmap_head_def *);
2585
2586 /* In final.c  */
2587 extern unsigned int compute_alignments (void);
2588 extern int asm_str_count (const char *templ);
2589 \f
2590 struct rtl_hooks
2591 {
2592   rtx (*gen_lowpart) (enum machine_mode, rtx);
2593   rtx (*gen_lowpart_no_emit) (enum machine_mode, rtx);
2594   rtx (*reg_nonzero_bits) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2595                            unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT *);
2596   rtx (*reg_num_sign_bit_copies) (const_rtx, enum machine_mode, const_rtx, enum machine_mode,
2597                                   unsigned int, unsigned int *);
2598   bool (*reg_truncated_to_mode) (enum machine_mode, const_rtx);
2599
2600   /* Whenever you add entries here, make sure you adjust rtlhooks-def.h.  */
2601 };
2602
2603 /* Each pass can provide its own.  */
2604 extern struct rtl_hooks rtl_hooks;
2605
2606 /* ... but then it has to restore these.  */
2607 extern const struct rtl_hooks general_rtl_hooks;
2608
2609 /* Keep this for the nonce.  */
2610 #define gen_lowpart rtl_hooks.gen_lowpart
2611
2612 extern void insn_locators_alloc (void);
2613 extern void insn_locators_free (void);
2614 extern void insn_locators_finalize (void);
2615 extern void set_curr_insn_source_location (location_t);
2616 extern location_t get_curr_insn_source_location (void);
2617 extern void set_curr_insn_block (tree);
2618 extern tree get_curr_insn_block (void);
2619 extern int curr_insn_locator (void);
2620 extern bool optimize_insn_for_size_p (void);
2621 extern bool optimize_insn_for_speed_p (void);
2622
2623 /* rtl-error.c */
2624 extern void _fatal_insn_not_found (const_rtx, const char *, int, const char *)
2625      ATTRIBUTE_NORETURN;
2626 extern void _fatal_insn (const char *, const_rtx, const char *, int, const char *)
2627      ATTRIBUTE_NORETURN;
2628
2629 #define fatal_insn(msgid, insn) \
2630         _fatal_insn (msgid, insn, __FILE__, __LINE__, __FUNCTION__)
2631 #define fatal_insn_not_found(insn) \
2632         _fatal_insn_not_found (insn, __FILE__, __LINE__, __FUNCTION__)
2633
2634
2635
2636 #endif /* ! GCC_RTL_H */