gcc/expr.h

   1 /* Definitions for code generation pass of GNU compiler.
   2    Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* The default branch cost is 1.  */
  23 #ifndef BRANCH_COST
  24 #define BRANCH_COST 1
  25 #endif
  26
  27 /* Macros to access the slots of a QUEUED rtx.
  28    Here rather than in rtl.h because only the expansion pass
  29    should ever encounter a QUEUED.  */
  30
  31 /* The variable for which an increment is queued.  */
  32 #define QUEUED_VAR(P) XEXP (P, 0)
  33 /* If the increment has been emitted, this is the insn
  34    that does the increment.  It is zero before the increment is emitted.
  35    If more than one insn is emitted, this is the first insn.  */
  36 #define QUEUED_INSN(P) XEXP (P, 1)
  37 /* If a pre-increment copy has been generated, this is the copy
  38    (it is a temporary reg).  Zero if no copy made yet.  */
  39 #define QUEUED_COPY(P) XEXP (P, 2)
  40 /* This is the body to use for the insn to do the increment.
  41    It is used to emit the increment.  */
  42 #define QUEUED_BODY(P) XEXP (P, 3)
  43 /* Next QUEUED in the queue.  */
  44 #define QUEUED_NEXT(P) XEXP (P, 4)
  45
  46 /* This is the 4th arg to `expand_expr'.
  47    EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx.
  48    EXPAND_INITIALIZER is similar but also record any labels on forced_labels.
  49    EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address
  50     is a constant that is not a legitimate address.
  51    EXPAND_MEMORY_USE_* are explained below.  */
  52 enum expand_modifier {EXPAND_NORMAL, EXPAND_SUM,
  53                       EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER,
  54                       EXPAND_MEMORY_USE_WO, EXPAND_MEMORY_USE_RW,
  55                       EXPAND_MEMORY_USE_BAD, EXPAND_MEMORY_USE_DONT};
  56
  57 /* Argument for chkr_* functions.
  58    MEMORY_USE_RO: the pointer reads memory.
  59    MEMORY_USE_WO: the pointer writes to memory.
  60    MEMORY_USE_RW: the pointer modifies memory (ie it reads and writes). An
  61                   example is (*ptr)++
  62    MEMORY_USE_BAD: use this if you don't know the behavior of the pointer, or
  63                    if you know there are no pointers.  Using an INDIRECT_REF
  64                    with MEMORY_USE_BAD will abort.
  65    MEMORY_USE_TW: just test for writing, without update.  Special.
  66    MEMORY_USE_DONT: the memory is neither read nor written.  This is used by
  67                    '->' and '.'.  */
  68 enum memory_use_mode {MEMORY_USE_BAD = 0, MEMORY_USE_RO = 1,
  69                       MEMORY_USE_WO = 2, MEMORY_USE_RW = 3,
  70                       MEMORY_USE_TW = 6, MEMORY_USE_DONT = 99};
  71
  72 /* Prevent the compiler from deferring stack pops.  See
  73    inhibit_defer_pop for more information.  */
  74 #define NO_DEFER_POP (inhibit_defer_pop += 1)
  75
  76 /* Allow the compiler to defer stack pops.  See inhibit_defer_pop for
  77    more information.  */
  78 #define OK_DEFER_POP (inhibit_defer_pop -= 1)
  79 \f
  80 #ifdef TREE_CODE /* Don't lose if tree.h not included.  */
  81 /* Structure to record the size of a sequence of arguments
  82    as the sum of a tree-expression and a constant.  This structure is
  83    also used to store offsets from the stack, which might be negative,
  84    so the variable part must be ssizetype, not sizetype.  */
  85
  86 struct args_size
  87 {
  88   HOST_WIDE_INT constant;
  89   tree var;
  90 };
  91 #endif
  92
  93 /* Add the value of the tree INC to the `struct args_size' TO.  */
  94
  95 #define ADD_PARM_SIZE(TO, INC)  \
  96 { tree inc = (INC);                             \
  97   if (host_integerp (inc, 0))                   \
  98     (TO).constant += tree_low_cst (inc, 0);     \
  99   else if ((TO).var == 0)                       \
 100     (TO).var = inc;                             \
 101   else                                          \
 102     (TO).var = size_binop (PLUS_EXPR, (TO).var, inc); }
 103
 104 #define SUB_PARM_SIZE(TO, DEC)  \
 105 { tree dec = (DEC);                             \
 106   if (host_integerp (dec, 0))                   \
 107     (TO).constant -= tree_low_cst (dec, 0);     \
 108   else if ((TO).var == 0)                       \
 109     (TO).var = size_binop (MINUS_EXPR, ssize_int (0), dec); \
 110   else                                          \
 111     (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); }
 112
 113 /* Convert the implicit sum in a `struct args_size' into a tree
 114    of type ssizetype.  */
 115 #define ARGS_SIZE_TREE(SIZE)                                    \
 116 ((SIZE).var == 0 ? ssize_int ((SIZE).constant)                  \
 117  : size_binop (PLUS_EXPR, (SIZE).var, ssize_int ((SIZE).constant)))
 118
 119 /* Convert the implicit sum in a `struct args_size' into an rtx.  */
 120 #define ARGS_SIZE_RTX(SIZE)                                     \
 121 ((SIZE).var == 0 ? GEN_INT ((SIZE).constant)                    \
 122  : expand_expr (ARGS_SIZE_TREE (SIZE), NULL_RTX, VOIDmode,      \
 123                 EXPAND_MEMORY_USE_BAD))
 124
 125 /* Supply a default definition for FUNCTION_ARG_PADDING:
 126    usually pad upward, but pad short args downward on
 127    big-endian machines.  */
 128
 129 enum direction {none, upward, downward};  /* Value has this type.  */
 130
 131 #ifndef FUNCTION_ARG_PADDING
 132 #define FUNCTION_ARG_PADDING(MODE, TYPE)                                \
 133   (! BYTES_BIG_ENDIAN                                                   \
 134    ? upward                                                             \
 135    : (((MODE) == BLKmode                                                \
 136        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
 137           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
 138        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
 139       ? downward : upward))
 140 #endif
 141
 142 /* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
 143    FUNCTION_ARG_PADDING, which also pads the length, handle any needed
 144    alignment.  */
 145
 146 #ifndef FUNCTION_ARG_BOUNDARY
 147 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)       PARM_BOUNDARY
 148 #endif
 149
 150 /* Provide a default value for STRICT_ARGUMENT_NAMING.  */
 151 #ifndef STRICT_ARGUMENT_NAMING
 152 #define STRICT_ARGUMENT_NAMING 0
 153 #endif
 154
 155 /* Provide a default value for PRETEND_OUTGOING_VARARGS_NAMED.  */
 156 #ifdef SETUP_INCOMING_VARARGS
 157 #ifndef PRETEND_OUTGOING_VARARGS_NAMED
 158 #define PRETEND_OUTGOING_VARARGS_NAMED 1
 159 #endif
 160 #else
 161 /* It is an error to define PRETEND_OUTGOING_VARARGS_NAMED without
 162    defining SETUP_INCOMING_VARARGS.  */
 163 #define PRETEND_OUTGOING_VARARGS_NAMED 0
 164 #endif
 165
 166 /* Nonzero if we do not know how to pass TYPE solely in registers.
 167    We cannot do so in the following cases:
 168
 169    - if the type has variable size
 170    - if the type is marked as addressable (it is required to be constructed
 171      into the stack)
 172    - if the padding and mode of the type is such that a copy into a register
 173      would put it into the wrong part of the register.
 174
 175    Which padding can't be supported depends on the byte endianness.
 176
 177    A value in a register is implicitly padded at the most significant end.
 178    On a big-endian machine, that is the lower end in memory.
 179    So a value padded in memory at the upper end can't go in a register.
 180    For a little-endian machine, the reverse is true.  */
 181
 182 #ifndef MUST_PASS_IN_STACK
 183 #define MUST_PASS_IN_STACK(MODE,TYPE)                   \
 184   ((TYPE) != 0                                          \
 185    && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST      \
 186        || TREE_ADDRESSABLE (TYPE)                       \
 187        || ((MODE) == BLKmode                            \
 188            && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
 189                  && 0 == (int_size_in_bytes (TYPE)      \
 190                           % (PARM_BOUNDARY / BITS_PER_UNIT))) \
 191            && (FUNCTION_ARG_PADDING (MODE, TYPE)        \
 192                == (BYTES_BIG_ENDIAN ? upward : downward)))))
 193 #endif
 194
 195 /* Nonzero if type TYPE should be returned in memory.
 196    Most machines can use the following default definition.  */
 197
 198 #ifndef RETURN_IN_MEMORY
 199 #define RETURN_IN_MEMORY(TYPE) (TYPE_MODE (TYPE) == BLKmode)
 200 #endif
 201
 202 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
 203    Normally move_insn, so Pmode stack pointer.  */
 204
 205 #ifndef STACK_SAVEAREA_MODE
 206 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
 207 #endif
 208
 209 /* Supply a default definition of STACK_SIZE_MODE for
 210    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
 211
 212 #ifndef STACK_SIZE_MODE
 213 #define STACK_SIZE_MODE word_mode
 214 #endif
 215
 216 /* Provide default values for the macros controlling stack checking.  */
 217
 218 #ifndef STACK_CHECK_BUILTIN
 219 #define STACK_CHECK_BUILTIN 0
 220 #endif
 221
 222 /* The default interval is one page.  */
 223 #ifndef STACK_CHECK_PROBE_INTERVAL
 224 #define STACK_CHECK_PROBE_INTERVAL 4096
 225 #endif
 226
 227 /* The default is to do a store into the stack.  */
 228 #ifndef STACK_CHECK_PROBE_LOAD
 229 #define STACK_CHECK_PROBE_LOAD 0
 230 #endif
 231
 232 /* This value is arbitrary, but should be sufficient for most machines.  */
 233 #ifndef STACK_CHECK_PROTECT
 234 #define STACK_CHECK_PROTECT (75 * UNITS_PER_WORD)
 235 #endif
 236
 237 /* Make the maximum frame size be the largest we can and still only need
 238    one probe per function.  */
 239 #ifndef STACK_CHECK_MAX_FRAME_SIZE
 240 #define STACK_CHECK_MAX_FRAME_SIZE \
 241   (STACK_CHECK_PROBE_INTERVAL - UNITS_PER_WORD)
 242 #endif
 243
 244 /* This is arbitrary, but should be large enough everywhere.  */
 245 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
 246 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
 247 #endif
 248
 249 /* Provide a reasonable default for the maximum size of an object to
 250    allocate in the fixed frame.  We may need to be able to make this
 251    controllable by the user at some point.  */
 252 #ifndef STACK_CHECK_MAX_VAR_SIZE
 253 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
 254 #endif
 255 \f
 256 /* Optabs are tables saying how to generate insn bodies
 257    for various machine modes and numbers of operands.
 258    Each optab applies to one operation.
 259    For example, add_optab applies to addition.
 260
 261    The insn_code slot is the enum insn_code that says how to
 262    generate an insn for this operation on a particular machine mode.
 263    It is CODE_FOR_nothing if there is no such insn on the target machine.
 264
 265    The `lib_call' slot is the name of the library function that
 266    can be used to perform the operation.
 267
 268    A few optabs, such as move_optab and cmp_optab, are used
 269    by special code.  */
 270
 271 typedef struct optab
 272 {
 273   enum rtx_code code;
 274   struct {
 275     enum insn_code insn_code;
 276     rtx libfunc;
 277   } handlers [NUM_MACHINE_MODES];
 278 } * optab;
 279
 280 /* Given an enum insn_code, access the function to construct
 281    the body of that kind of insn.  */
 282 #ifdef FUNCTION_CONVERSION_BUG
 283 /* Some compilers fail to convert a function properly to a
 284    pointer-to-function when used as an argument.
 285    So produce the pointer-to-function directly.
 286    Luckily, these compilers seem to work properly when you
 287    call the pointer-to-function.  */
 288 #define GEN_FCN(CODE) (insn_data[(int) (CODE)].genfun)
 289 #else
 290 #define GEN_FCN(CODE) (*insn_data[(int) (CODE)].genfun)
 291 #endif
 292
 293 /* Enumeration of valid indexes into optab_table.  */
 294 enum optab_index
 295 {
 296   OTI_add,
 297   OTI_addv,
 298   OTI_sub,
 299   OTI_subv,
 300
 301   /* Signed and fp multiply */
 302   OTI_smul,
 303   OTI_smulv,
 304   /* Signed multiply, return high word */
 305   OTI_smul_highpart,
 306   OTI_umul_highpart,
 307   /* Signed multiply with result one machine mode wider than args */
 308   OTI_smul_widen,
 309   OTI_umul_widen,
 310
 311   /* Signed divide */
 312   OTI_sdiv,
 313   OTI_sdivv,
 314   /* Signed divide-and-remainder in one */
 315   OTI_sdivmod,
 316   OTI_udiv,
 317   OTI_udivmod,
 318   /* Signed remainder */
 319   OTI_smod,
 320   OTI_umod,
 321   /* Optab for floating divide. */
 322   OTI_flodiv,
 323   /* Convert float to integer in float fmt */
 324   OTI_ftrunc,
 325
 326   /* Logical and */
 327   OTI_and,
 328   /* Logical or */
 329   OTI_ior,
 330   /* Logical xor */
 331   OTI_xor,
 332
 333   /* Arithmetic shift left */
 334   OTI_ashl,
 335   /* Logical shift right */
 336   OTI_lshr,
 337   /* Arithmetic shift right */
 338   OTI_ashr,
 339   /* Rotate left */
 340   OTI_rotl,
 341   /* Rotate right */
 342   OTI_rotr,
 343   /* Signed and floating-point minimum value */
 344   OTI_smin,
 345   /* Signed and floating-point maximum value */
 346   OTI_smax,
 347   /* Unsigned minimum value */
 348   OTI_umin,
 349   /* Unsigned maximum value */
 350   OTI_umax,
 351
 352   /* Move instruction.  */
 353   OTI_mov,
 354   /* Move, preserving high part of register.  */
 355   OTI_movstrict,
 356
 357   /* Unary operations */
 358   /* Negation */
 359   OTI_neg,
 360   OTI_negv,
 361   /* Abs value */
 362   OTI_abs,
 363   OTI_absv,
 364   /* Bitwise not */
 365   OTI_one_cmpl,
 366   /* Find first bit set */
 367   OTI_ffs,
 368   /* Square root */
 369   OTI_sqrt,
 370   /* Sine */
 371   OTI_sin,
 372   /* Cosine */
 373   OTI_cos,
 374
 375   /* Compare insn; two operands.  */
 376   OTI_cmp,
 377   /* Used only for libcalls for unsigned comparisons.  */
 378   OTI_ucmp,
 379   /* tst insn; compare one operand against 0 */
 380   OTI_tst,
 381
 382   /* String length */
 383   OTI_strlen,
 384
 385   /* Combined compare & jump/store flags/move operations.  */
 386   OTI_cbranch,
 387   OTI_cmov,
 388   OTI_cstore,
 389
 390   OTI_MAX
 391 };
 392
 393 extern optab optab_table[OTI_MAX];
 394
 395 #define add_optab (optab_table[OTI_add])
 396 #define sub_optab (optab_table[OTI_sub])
 397 #define smul_optab (optab_table[OTI_smul])
 398 #define addv_optab (optab_table[OTI_addv])
 399 #define subv_optab (optab_table[OTI_subv])
 400 #define smul_highpart_optab (optab_table[OTI_smul_highpart])
 401 #define umul_highpart_optab (optab_table[OTI_umul_highpart])
 402 #define smul_widen_optab (optab_table[OTI_smul_widen])
 403 #define umul_widen_optab (optab_table[OTI_umul_widen])
 404 #define sdiv_optab (optab_table[OTI_sdiv])
 405 #define smulv_optab (optab_table[OTI_smulv])
 406 #define sdivv_optab (optab_table[OTI_sdivv])
 407 #define sdivmod_optab (optab_table[OTI_sdivmod])
 408 #define udiv_optab (optab_table[OTI_udiv])
 409 #define udivmod_optab (optab_table[OTI_udivmod])
 410 #define smod_optab (optab_table[OTI_smod])
 411 #define umod_optab (optab_table[OTI_umod])
 412 #define flodiv_optab (optab_table[OTI_flodiv])
 413 #define ftrunc_optab (optab_table[OTI_ftrunc])
 414 #define and_optab (optab_table[OTI_and])
 415 #define ior_optab (optab_table[OTI_ior])
 416 #define xor_optab (optab_table[OTI_xor])
 417 #define ashl_optab (optab_table[OTI_ashl])
 418 #define lshr_optab (optab_table[OTI_lshr])
 419 #define ashr_optab (optab_table[OTI_ashr])
 420 #define rotl_optab (optab_table[OTI_rotl])
 421 #define rotr_optab (optab_table[OTI_rotr])
 422 #define smin_optab (optab_table[OTI_smin])
 423 #define smax_optab (optab_table[OTI_smax])
 424 #define umin_optab (optab_table[OTI_umin])
 425 #define umax_optab (optab_table[OTI_umax])
 426
 427 #define mov_optab (optab_table[OTI_mov])
 428 #define movstrict_optab (optab_table[OTI_movstrict])
 429
 430 #define neg_optab (optab_table[OTI_neg])
 431 #define negv_optab (optab_table[OTI_negv])
 432 #define abs_optab (optab_table[OTI_abs])
 433 #define absv_optab (optab_table[OTI_absv])
 434 #define one_cmpl_optab (optab_table[OTI_one_cmpl])
 435 #define ffs_optab (optab_table[OTI_ffs])
 436 #define sqrt_optab (optab_table[OTI_sqrt])
 437 #define sin_optab (optab_table[OTI_sin])
 438 #define cos_optab (optab_table[OTI_cos])
 439
 440 #define cmp_optab (optab_table[OTI_cmp])
 441 #define ucmp_optab (optab_table[OTI_ucmp])
 442 #define tst_optab (optab_table[OTI_tst])
 443
 444 #define strlen_optab (optab_table[OTI_strlen])
 445
 446 #define cbranch_optab (optab_table[OTI_cbranch])
 447 #define cmov_optab (optab_table[OTI_cmov])
 448 #define cstore_optab (optab_table[OTI_cstore])
 449
 450 /* Tables of patterns for extending one integer mode to another.  */
 451 extern enum insn_code extendtab[MAX_MACHINE_MODE][MAX_MACHINE_MODE][2];
 452
 453 /* Tables of patterns for converting between fixed and floating point. */
 454 extern enum insn_code fixtab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
 455 extern enum insn_code fixtrunctab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
 456 extern enum insn_code floattab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
 457
 458 /* Contains the optab used for each rtx code.  */
 459 extern optab code_to_optab[NUM_RTX_CODE + 1];
 460
 461 /* Passed to expand_binop and expand_unop to say which options to try to use
 462    if the requested operation can't be open-coded on the requisite mode.
 463    Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using a library call.
 464    Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try using a wider mode.
 465    OPTAB_MUST_WIDEN says try widening and don't try anything else.  */
 466
 467 enum optab_methods
 468 {
 469   OPTAB_DIRECT,
 470   OPTAB_LIB,
 471   OPTAB_WIDEN,
 472   OPTAB_LIB_WIDEN,
 473   OPTAB_MUST_WIDEN
 474 };
 475
 476 /* Enumeration of indexes into libfunc_table.  */
 477 enum libfunc_index
 478 {
 479   LTI_extendsfdf2,
 480   LTI_extendsfxf2,
 481   LTI_extendsftf2,
 482   LTI_extenddfxf2,
 483   LTI_extenddftf2,
 484
 485   LTI_truncdfsf2,
 486   LTI_truncxfsf2,
 487   LTI_trunctfsf2,
 488   LTI_truncxfdf2,
 489   LTI_trunctfdf2,
 490
 491   LTI_memcpy,
 492   LTI_memmove,
 493   LTI_bcopy,
 494   LTI_memcmp,
 495   LTI_bcmp,
 496   LTI_memset,
 497   LTI_bzero,
 498
 499   LTI_unwind_resume,
 500   LTI_eh_personality,
 501   LTI_setjmp,
 502   LTI_longjmp,
 503   LTI_unwind_sjlj_register,
 504   LTI_unwind_sjlj_unregister,
 505
 506   LTI_eqhf2,
 507   LTI_nehf2,
 508   LTI_gthf2,
 509   LTI_gehf2,
 510   LTI_lthf2,
 511   LTI_lehf2,
 512   LTI_unordhf2,
 513
 514   LTI_eqsf2,
 515   LTI_nesf2,
 516   LTI_gtsf2,
 517   LTI_gesf2,
 518   LTI_ltsf2,
 519   LTI_lesf2,
 520   LTI_unordsf2,
 521
 522   LTI_eqdf2,
 523   LTI_nedf2,
 524   LTI_gtdf2,
 525   LTI_gedf2,
 526   LTI_ltdf2,
 527   LTI_ledf2,
 528   LTI_unorddf2,
 529
 530   LTI_eqxf2,
 531   LTI_nexf2,
 532   LTI_gtxf2,
 533   LTI_gexf2,
 534   LTI_ltxf2,
 535   LTI_lexf2,
 536   LTI_unordxf2,
 537
 538   LTI_eqtf2,
 539   LTI_netf2,
 540   LTI_gttf2,
 541   LTI_getf2,
 542   LTI_lttf2,
 543   LTI_letf2,
 544   LTI_unordtf2,
 545
 546   LTI_floatsisf,
 547   LTI_floatdisf,
 548   LTI_floattisf,
 549
 550   LTI_floatsidf,
 551   LTI_floatdidf,
 552   LTI_floattidf,
 553
 554   LTI_floatsixf,
 555   LTI_floatdixf,
 556   LTI_floattixf,
 557
 558   LTI_floatsitf,
 559   LTI_floatditf,
 560   LTI_floattitf,
 561
 562   LTI_fixsfsi,
 563   LTI_fixsfdi,
 564   LTI_fixsfti,
 565
 566   LTI_fixdfsi,
 567   LTI_fixdfdi,
 568   LTI_fixdfti,
 569
 570   LTI_fixxfsi,
 571   LTI_fixxfdi,
 572   LTI_fixxfti,
 573
 574   LTI_fixtfsi,
 575   LTI_fixtfdi,
 576   LTI_fixtfti,
 577
 578   LTI_fixunssfsi,
 579   LTI_fixunssfdi,
 580   LTI_fixunssfti,
 581
 582   LTI_fixunsdfsi,
 583   LTI_fixunsdfdi,
 584   LTI_fixunsdfti,
 585
 586   LTI_fixunsxfsi,
 587   LTI_fixunsxfdi,
 588   LTI_fixunsxfti,
 589
 590   LTI_fixunstfsi,
 591   LTI_fixunstfdi,
 592   LTI_fixunstfti,
 593
 594   LTI_chkr_check_addr,
 595   LTI_chkr_set_right,
 596   LTI_chkr_copy_bitmap,
 597   LTI_chkr_check_exec,
 598   LTI_chkr_check_str,
 599
 600   LTI_profile_function_entry,
 601   LTI_profile_function_exit,
 602
 603   LTI_MAX
 604 };
 605
 606 /* SYMBOL_REF rtx's for the library functions that are called
 607    implicitly and not via optabs.  */
 608 extern rtx libfunc_table[LTI_MAX];
 609
 610 /* Accessor macros for libfunc_table.  */
 611 #define extendsfdf2_libfunc     (libfunc_table[LTI_extendsfdf2])
 612 #define extendsfxf2_libfunc     (libfunc_table[LTI_extendsfxf2])
 613 #define extendsftf2_libfunc     (libfunc_table[LTI_extendsftf2])
 614 #define extenddfxf2_libfunc     (libfunc_table[LTI_extenddfxf2])
 615 #define extenddftf2_libfunc     (libfunc_table[LTI_extenddftf2])
 616
 617 #define truncdfsf2_libfunc      (libfunc_table[LTI_truncdfsf2])
 618 #define truncxfsf2_libfunc      (libfunc_table[LTI_truncxfsf2])
 619 #define trunctfsf2_libfunc      (libfunc_table[LTI_trunctfsf2])
 620 #define truncxfdf2_libfunc      (libfunc_table[LTI_truncxfdf2])
 621 #define trunctfdf2_libfunc      (libfunc_table[LTI_trunctfdf2])
 622
 623 #define memcpy_libfunc  (libfunc_table[LTI_memcpy])
 624 #define memmove_libfunc (libfunc_table[LTI_memmove])
 625 #define bcopy_libfunc   (libfunc_table[LTI_bcopy])
 626 #define memcmp_libfunc  (libfunc_table[LTI_memcmp])
 627 #define bcmp_libfunc    (libfunc_table[LTI_bcmp])
 628 #define memset_libfunc  (libfunc_table[LTI_memset])
 629 #define bzero_libfunc   (libfunc_table[LTI_bzero])
 630
 631 #define unwind_resume_libfunc   (libfunc_table[LTI_unwind_resume])
 632 #define eh_personality_libfunc  (libfunc_table[LTI_eh_personality])
 633 #define setjmp_libfunc  (libfunc_table[LTI_setjmp])
 634 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
 635 #define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register])
 636 #define unwind_sjlj_unregister_libfunc \
 637   (libfunc_table[LTI_unwind_sjlj_unregister])
 638
 639 #define eqhf2_libfunc   (libfunc_table[LTI_eqhf2])
 640 #define nehf2_libfunc   (libfunc_table[LTI_nehf2])
 641 #define gthf2_libfunc   (libfunc_table[LTI_gthf2])
 642 #define gehf2_libfunc   (libfunc_table[LTI_gehf2])
 643 #define lthf2_libfunc   (libfunc_table[LTI_lthf2])
 644 #define lehf2_libfunc   (libfunc_table[LTI_lehf2])
 645 #define unordhf2_libfunc        (libfunc_table[LTI_unordhf2])
 646
 647 #define eqsf2_libfunc   (libfunc_table[LTI_eqsf2])
 648 #define nesf2_libfunc   (libfunc_table[LTI_nesf2])
 649 #define gtsf2_libfunc   (libfunc_table[LTI_gtsf2])
 650 #define gesf2_libfunc   (libfunc_table[LTI_gesf2])
 651 #define ltsf2_libfunc   (libfunc_table[LTI_ltsf2])
 652 #define lesf2_libfunc   (libfunc_table[LTI_lesf2])
 653 #define unordsf2_libfunc        (libfunc_table[LTI_unordsf2])
 654
 655 #define eqdf2_libfunc   (libfunc_table[LTI_eqdf2])
 656 #define nedf2_libfunc   (libfunc_table[LTI_nedf2])
 657 #define gtdf2_libfunc   (libfunc_table[LTI_gtdf2])
 658 #define gedf2_libfunc   (libfunc_table[LTI_gedf2])
 659 #define ltdf2_libfunc   (libfunc_table[LTI_ltdf2])
 660 #define ledf2_libfunc   (libfunc_table[LTI_ledf2])
 661 #define unorddf2_libfunc        (libfunc_table[LTI_unorddf2])
 662
 663 #define eqxf2_libfunc   (libfunc_table[LTI_eqxf2])
 664 #define nexf2_libfunc   (libfunc_table[LTI_nexf2])
 665 #define gtxf2_libfunc   (libfunc_table[LTI_gtxf2])
 666 #define gexf2_libfunc   (libfunc_table[LTI_gexf2])
 667 #define ltxf2_libfunc   (libfunc_table[LTI_ltxf2])
 668 #define lexf2_libfunc   (libfunc_table[LTI_lexf2])
 669 #define unordxf2_libfunc        (libfunc_table[LTI_unordxf2])
 670
 671 #define eqtf2_libfunc   (libfunc_table[LTI_eqtf2])
 672 #define netf2_libfunc   (libfunc_table[LTI_netf2])
 673 #define gttf2_libfunc   (libfunc_table[LTI_gttf2])
 674 #define getf2_libfunc   (libfunc_table[LTI_getf2])
 675 #define lttf2_libfunc   (libfunc_table[LTI_lttf2])
 676 #define letf2_libfunc   (libfunc_table[LTI_letf2])
 677 #define unordtf2_libfunc        (libfunc_table[LTI_unordtf2])
 678
 679 #define floatsisf_libfunc       (libfunc_table[LTI_floatsisf])
 680 #define floatdisf_libfunc       (libfunc_table[LTI_floatdisf])
 681 #define floattisf_libfunc       (libfunc_table[LTI_floattisf])
 682
 683 #define floatsidf_libfunc       (libfunc_table[LTI_floatsidf])
 684 #define floatdidf_libfunc       (libfunc_table[LTI_floatdidf])
 685 #define floattidf_libfunc       (libfunc_table[LTI_floattidf])
 686
 687 #define floatsixf_libfunc       (libfunc_table[LTI_floatsixf])
 688 #define floatdixf_libfunc       (libfunc_table[LTI_floatdixf])
 689 #define floattixf_libfunc       (libfunc_table[LTI_floattixf])
 690
 691 #define floatsitf_libfunc       (libfunc_table[LTI_floatsitf])
 692 #define floatditf_libfunc       (libfunc_table[LTI_floatditf])
 693 #define floattitf_libfunc       (libfunc_table[LTI_floattitf])
 694
 695 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
 696 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
 697 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
 698
 699 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
 700 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
 701 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
 702
 703 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
 704 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
 705 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
 706
 707 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
 708 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
 709 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
 710
 711 #define fixunssfsi_libfunc      (libfunc_table[LTI_fixunssfsi])
 712 #define fixunssfdi_libfunc      (libfunc_table[LTI_fixunssfdi])
 713 #define fixunssfti_libfunc      (libfunc_table[LTI_fixunssfti])
 714
 715 #define fixunsdfsi_libfunc      (libfunc_table[LTI_fixunsdfsi])
 716 #define fixunsdfdi_libfunc      (libfunc_table[LTI_fixunsdfdi])
 717 #define fixunsdfti_libfunc      (libfunc_table[LTI_fixunsdfti])
 718
 719 #define fixunsxfsi_libfunc      (libfunc_table[LTI_fixunsxfsi])
 720 #define fixunsxfdi_libfunc      (libfunc_table[LTI_fixunsxfdi])
 721 #define fixunsxfti_libfunc      (libfunc_table[LTI_fixunsxfti])
 722
 723 #define fixunstfsi_libfunc      (libfunc_table[LTI_fixunstfsi])
 724 #define fixunstfdi_libfunc      (libfunc_table[LTI_fixunstfdi])
 725 #define fixunstfti_libfunc      (libfunc_table[LTI_fixunstfti])
 726
 727 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
 728 #define chkr_set_right_libfunc  (libfunc_table[LTI_chkr_set_right])
 729 #define chkr_copy_bitmap_libfunc        (libfunc_table[LTI_chkr_copy_bitmap])
 730 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
 731 #define chkr_check_str_libfunc  (libfunc_table[LTI_chkr_check_str])
 732
 733 #define profile_function_entry_libfunc  (libfunc_table[LTI_profile_function_entry])
 734 #define profile_function_exit_libfunc   (libfunc_table[LTI_profile_function_exit])
 735 \f
 736 typedef rtx (*rtxfun) PARAMS ((rtx));
 737
 738 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 739    gives the gen_function to make a branch to test that condition.  */
 740
 741 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 742
 743 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 744    gives the insn code to make a store-condition insn
 745    to test that condition.  */
 746
 747 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 748
 749 #ifdef HAVE_conditional_move
 750 /* Indexed by the machine mode, gives the insn code to make a conditional
 751    move insn.  */
 752
 753 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 754 #endif
 755
 756 /* This array records the insn_code of insns to perform block moves.  */
 757 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 758
 759 /* This array records the insn_code of insns to perform block clears.  */
 760 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 761
 762 /* Define functions given in optabs.c.  */
 763
 764 /* Expand a binary operation given optab and rtx operands.  */
 765 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
 766                                  int, enum optab_methods));
 767
 768 /* Expand a binary operation with both signed and unsigned forms.  */
 769 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
 770                                       rtx, rtx, int, enum optab_methods));
 771
 772 /* Generate code to perform an operation on two operands with two results.  */
 773 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
 774
 775 /* Expand a unary arithmetic operation given optab rtx operand.  */
 776 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
 777
 778 /* Expand the absolute value operation.  */
 779 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
 780
 781 /* Expand the complex absolute value operation.  */
 782 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 783
 784 /* Generate an instruction with a given INSN_CODE with an output and
 785    an input.  */
 786 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
 787
 788 /* Emit code to perform a series of operations on a multi-word quantity, one
 789    word at a time.  */
 790 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
 791
 792 /* Emit code to make a call to a constant function or a library call. */
 793 extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx));
 794
 795 /* Emit one rtl instruction to store zero in specified rtx.  */
 796 extern void emit_clr_insn PARAMS ((rtx));
 797
 798 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 799 extern void emit_0_to_1_insn PARAMS ((rtx));
 800
 801 /* Emit one rtl insn to compare two rtx's.  */
 802 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
 803                                    enum machine_mode, int, unsigned int));
 804
 805 /* Emit a pair of rtl insns to compare two rtx's and to jump
 806    to a label if the comparison is true.  */
 807 extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx,
 808                                              enum machine_mode, int,
 809                                              unsigned int, rtx));
 810
 811 /* The various uses that a comparison can have; used by can_compare_p:
 812    jumps, conditional moves, store flag operations.  */
 813 enum can_compare_purpose
 814 {
 815   ccp_jump,
 816   ccp_cmov,
 817   ccp_store_flag
 818 };
 819
 820 /* Nonzero if a compare of mode MODE can be done straightforwardly
 821    (without splitting it into pieces).  */
 822 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
 823                                   enum can_compare_purpose));
 824
 825 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
 826                                       enum machine_mode *, int *, int,
 827                                       enum can_compare_purpose));
 828
 829 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
 830                                     enum machine_mode, int));
 831
 832 /* Generate code to indirectly jump to a location given in the rtx LOC.  */
 833 extern void emit_indirect_jump PARAMS ((rtx));
 834
 835 #ifdef HAVE_conditional_move
 836 /* Emit a conditional move operation.  */
 837 rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx,
 838                                    enum machine_mode, rtx, rtx,
 839                                    enum machine_mode, int));
 840
 841 /* Return non-zero if the conditional move is supported.  */
 842 int can_conditionally_move_p PARAMS ((enum machine_mode mode));
 843
 844 #endif
 845
 846 /* Create but don't emit one rtl instruction to add one rtx into another.
 847    Modes must match; operands must meet the operation's predicates.
 848    Likewise for subtraction and for just copying.
 849    These do not call protect_from_queue; caller must do so.  */
 850 extern rtx gen_add2_insn PARAMS ((rtx, rtx));
 851 extern rtx gen_sub2_insn PARAMS ((rtx, rtx));
 852 extern rtx gen_move_insn PARAMS ((rtx, rtx));
 853 extern int have_add2_insn PARAMS ((enum machine_mode));
 854 extern int have_sub2_insn PARAMS ((enum machine_mode));
 855
 856 /* Return the INSN_CODE to use for an extend operation.  */
 857 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
 858                                             enum machine_mode, int));
 859
 860 /* Generate the body of an insn to extend Y (with mode MFROM)
 861    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 862 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
 863                                     enum machine_mode, int));
 864
 865 /* Initialize the tables that control conversion between fixed and
 866    floating values.  */
 867 extern void init_fixtab PARAMS ((void));
 868 extern void init_floattab PARAMS ((void));
 869
 870 /* Generate code for a FLOAT_EXPR.  */
 871 extern void expand_float PARAMS ((rtx, rtx, int));
 872
 873 /* Generate code for a FIX_EXPR.  */
 874 extern void expand_fix PARAMS ((rtx, rtx, int));
 875
 876 /* Call this to initialize an optab function entry.  */
 877 extern rtx init_one_libfunc PARAMS ((const char *));
 878
 879 /* Call this once to initialize the contents of the optabs
 880    appropriately for the current target machine.  */
 881 extern void init_optabs PARAMS ((void));
 882 \f
 883 /* Functions from expmed.c:  */
 884
 885 /* Arguments MODE, RTX: return an rtx for the negation of that value.
 886    May emit insns.  */
 887 extern rtx negate_rtx PARAMS ((enum machine_mode, rtx));
 888
 889 /* Expand a logical AND operation.  */
 890 extern rtx expand_and PARAMS ((rtx, rtx, rtx));
 891
 892 /* Emit a store-flag operation.  */
 893 extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx,
 894                                     enum machine_mode, int, int));
 895
 896 /* Like emit_store_flag, but always succeeds.  */
 897 extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx,
 898                                           enum machine_mode, int, int));
 899
 900 /* Functions from loop.c:  */
 901
 902 /* Given an insn and condition, return a canonical description of
 903    the test being made.  */
 904 extern rtx canonicalize_condition PARAMS ((rtx, rtx, int, rtx *, rtx));
 905
 906 /* Given a JUMP_INSN, return a canonical description of the test
 907    being made.  */
 908 extern rtx get_condition PARAMS ((rtx, rtx *));
 909
 910 /* Generate a conditional trap instruction.  */
 911 extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx));
 912 \f
 913 /* Functions from builtins.c:  */
 914 #ifdef TREE_CODE
 915 extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 916 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
 917 extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx));
 918 extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree));
 919 extern rtx expand_builtin_va_arg PARAMS ((tree, tree));
 920 #endif
 921
 922 extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx));
 923 extern void expand_builtin_setjmp_receiver PARAMS ((rtx));
 924 extern void expand_builtin_longjmp PARAMS ((rtx, rtx));
 925 extern rtx expand_builtin_saveregs PARAMS ((void));
 926 extern HOST_WIDE_INT get_varargs_alias_set PARAMS ((void));
 927 extern HOST_WIDE_INT get_frame_alias_set PARAMS ((void));
 928 extern void record_base_value           PARAMS ((unsigned int, rtx, int));
 929 extern void record_alias_subset         PARAMS ((HOST_WIDE_INT,
 930                                                  HOST_WIDE_INT));
 931 extern HOST_WIDE_INT new_alias_set              PARAMS ((void));
 932 \f
 933 /* Functions from expr.c:  */
 934
 935 /* This is run once per compilation to set up which modes can be used
 936    directly in memory and to initialize the block move optab.  */
 937 extern void init_expr_once PARAMS ((void));
 938
 939 /* This is run at the start of compiling a function.  */
 940 extern void init_expr PARAMS ((void));
 941
 942 /* This function is run once to initialize stor-layout.c.  */
 943
 944 extern void init_stor_layout_once PARAMS ((void));
 945
 946 /* This is run at the end of compiling a function.  */
 947 extern void finish_expr_for_function PARAMS ((void));
 948
 949 /* Use protect_from_queue to convert a QUEUED expression
 950    into something that you can put immediately into an instruction.  */
 951 extern rtx protect_from_queue PARAMS ((rtx, int));
 952
 953 /* Perform all the pending incrementations.  */
 954 extern void emit_queue PARAMS ((void));
 955
 956 /* Tell if something has a queued subexpression.  */
 957 extern int queued_subexp_p PARAMS ((rtx));
 958
 959 /* Emit some rtl insns to move data between rtx's, converting machine modes.
 960    Both modes must be floating or both fixed.  */
 961 extern void convert_move PARAMS ((rtx, rtx, int));
 962
 963 /* Convert an rtx to specified machine mode and return the result.  */
 964 extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int));
 965
 966 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 967 extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode,
 968                                   rtx, int));
 969
 970 /* Emit code to move a block Y to a block X.  */
 971 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, unsigned int));
 972
 973 /* Copy all or part of a value X into registers starting at REGNO.
 974    The number of registers to be filled is NREGS.  */
 975 extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode));
 976
 977 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
 978    The number of registers to be filled is NREGS.  */
 979 extern void move_block_from_reg PARAMS ((int, rtx, int, int));
 980
 981 /* Load a BLKmode value into non-consecutive registers represented by a
 982    PARALLEL.  */
 983 extern void emit_group_load PARAMS ((rtx, rtx, int, unsigned int));
 984
 985 /* Store a BLKmode value from non-consecutive registers represented by a
 986    PARALLEL.  */
 987 extern void emit_group_store PARAMS ((rtx, rtx, int, unsigned int));
 988
 989 #ifdef TREE_CODE
 990 /* Copy BLKmode object from a set of registers. */
 991 extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree));
 992 #endif
 993
 994 /* Mark REG as holding a parameter for the next CALL_INSN.  */
 995 extern void use_reg PARAMS ((rtx *, rtx));
 996
 997 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
 998    for the next CALL_INSN.  */
 999 extern void use_regs PARAMS ((rtx *, int, int));
1000
1001 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
1002 extern void use_group_regs PARAMS ((rtx *, rtx));
1003
1004 /* Write zeros through the storage of OBJECT.
1005    If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
1006    alignment.  */
1007 extern rtx clear_storage PARAMS ((rtx, rtx, unsigned int));
1008
1009 /* Return non-zero if it is desirable to store LEN bytes generated by
1010    CONSTFUN with several move instructions by store_by_pieces
1011    function.  CONSTFUNDATA is a pointer which will be passed as argument
1012    in every CONSTFUN call.
1013    ALIGN is maximum alignment we can assume.  */
1014 extern int can_store_by_pieces PARAMS ((unsigned HOST_WIDE_INT,
1015                                         rtx (*) (PTR, HOST_WIDE_INT,
1016                                                  enum machine_mode),
1017                                         PTR, unsigned int));
1018
1019 /* Generate several move instructions to store LEN bytes generated by
1020    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
1021    pointer which will be passed as argument in every CONSTFUN call.
1022    ALIGN is maximum alignment we can assume.  */
1023 extern void store_by_pieces PARAMS ((rtx, unsigned HOST_WIDE_INT,
1024                                      rtx (*) (PTR, HOST_WIDE_INT,
1025                                               enum machine_mode),
1026                                      PTR, unsigned int));
1027
1028 /* Emit insns to set X from Y.  */
1029 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1030
1031 /* Emit insns to set X from Y, with no frills.  */
1032 extern rtx emit_move_insn_1 PARAMS ((rtx, rtx));
1033
1034 /* Push a block of length SIZE (perhaps variable)
1035    and return an rtx to address the beginning of the block.  */
1036 extern rtx push_block PARAMS ((rtx, int, int));
1037
1038 /* Make an operand to push something on the stack.  */
1039 extern rtx gen_push_operand PARAMS ((void));
1040
1041 #ifdef TREE_CODE
1042 /* Generate code to push something onto the stack, given its mode and type.  */
1043 extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx,
1044                                     unsigned int, int, rtx, int, rtx, rtx,
1045                                     int, rtx));
1046
1047 /* Expand an assignment that stores the value of FROM into TO. */
1048 extern rtx expand_assignment PARAMS ((tree, tree, int, int));
1049
1050 /* Generate code for computing expression EXP,
1051    and storing the value into TARGET.
1052    If SUGGEST_REG is nonzero, copy the value through a register
1053    and return that register, if that is possible.  */
1054 extern rtx store_expr PARAMS ((tree, rtx, int));
1055 #endif
1056
1057 /* Given an rtx that may include add and multiply operations,
1058    generate them as insns and return a pseudo-reg containing the value.
1059    Useful after calling expand_expr with 1 as sum_ok.  */
1060 extern rtx force_operand PARAMS ((rtx, rtx));
1061
1062 #ifdef TREE_CODE
1063 /* Generate code for computing expression EXP.
1064    An rtx for the computed value is returned.  The value is never null.
1065    In the case of a void EXP, const0_rtx is returned.  */
1066 extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode,
1067                                 enum expand_modifier));
1068 #endif
1069
1070 /* At the start of a function, record that we have no previously-pushed
1071    arguments waiting to be popped.  */
1072 extern void init_pending_stack_adjust PARAMS ((void));
1073
1074 /* When exiting from function, if safe, clear out any pending stack adjust
1075    so the adjustment won't get done.  */
1076 extern void clear_pending_stack_adjust PARAMS ((void));
1077
1078 /* Pop any previously-pushed arguments that have not been popped yet.  */
1079 extern void do_pending_stack_adjust PARAMS ((void));
1080
1081 #ifdef TREE_CODE
1082 /* Return the tree node and offset if a given argument corresponds to
1083    a string constant.  */
1084 extern tree string_constant PARAMS ((tree, tree *));
1085
1086 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
1087 extern void jumpifnot PARAMS ((tree, rtx));
1088
1089 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
1090 extern void jumpif PARAMS ((tree, rtx));
1091
1092 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1093    the result is zero, or IF_TRUE_LABEL if the result is one.  */
1094 extern void do_jump PARAMS ((tree, rtx, rtx));
1095 #endif
1096
1097 /* Generate rtl to compare two rtx's, will call emit_cmp_insn.  */
1098 extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int,
1099                                      enum machine_mode, rtx, unsigned int));
1100 extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int,
1101                                              enum machine_mode, rtx,
1102                                              unsigned int, rtx, rtx));
1103
1104 /* Generate a tablejump instruction (used for switch statements).  */
1105 extern void do_tablejump PARAMS ((rtx, enum machine_mode, rtx, rtx, rtx));
1106 \f
1107 #ifdef TREE_CODE
1108 /* rtl.h and tree.h were included.  */
1109 /* Return an rtx for the size in bytes of the value of an expr.  */
1110 extern rtx expr_size PARAMS ((tree));
1111
1112 extern rtx lookup_static_chain PARAMS ((tree));
1113
1114 /* Convert a stack slot address ADDR valid in function FNDECL
1115    into an address valid in this function (using a static chain).  */
1116 extern rtx fix_lexical_addr PARAMS ((rtx, tree));
1117
1118 /* Return the address of the trampoline for entering nested fn FUNCTION.  */
1119 extern rtx trampoline_address PARAMS ((tree));
1120
1121 /* Return an rtx that refers to the value returned by a function
1122    in its original home.  This becomes invalid if any more code is emitted.  */
1123 extern rtx hard_function_value PARAMS ((tree, tree, int));
1124
1125 extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int));
1126
1127 extern rtx expand_call PARAMS ((tree, rtx, int));
1128
1129 extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree,
1130                                  rtx, int));
1131 extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx,
1132                                   rtx, rtx, int));
1133 extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree,
1134                                          struct args_size *,
1135                                          struct args_size *,
1136                                          struct args_size *,
1137                                          struct args_size *));
1138 extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx));
1139
1140 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary.  */
1141 extern rtx label_rtx PARAMS ((tree));
1142 #endif
1143
1144 /* Indicate how an input argument register was promoted.  */
1145 extern rtx promoted_input_arg PARAMS ((unsigned int, enum machine_mode *,
1146                                        int *));
1147
1148 /* Return an rtx like arg but sans any constant terms.
1149    Returns the original rtx if it has no constant terms.
1150    The constant terms are added and stored via a second arg.  */
1151 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1152
1153 /* Convert arg to a valid memory address for specified machine mode,
1154    by emitting insns to perform arithmetic if nec.  */
1155 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1156
1157 /* Like `memory_address' but pretent `flag_force_addr' is 0.  */
1158 extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx));
1159
1160 /* Return a memory reference like MEMREF, but with its mode changed
1161    to MODE and its address changed to ADDR.
1162    (VOIDmode means don't change the mode.
1163    NULL for ADDR means don't change the address.)  */
1164 extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx));
1165
1166 /* Return a memory reference like MEMREF, but which is known to have a
1167    valid address.  */
1168 extern rtx validize_mem PARAMS ((rtx));
1169
1170 #ifdef TREE_CODE
1171 /* Given REF, either a MEM or a REG, and T, either the type of X or
1172    the expression corresponding to REF, set RTX_UNCHANGING_P if
1173    appropriate.  */
1174 extern void maybe_set_unchanging PARAMS ((rtx, tree));
1175
1176 /* Given REF, a MEM, and T, either the type of X or the expression
1177    corresponding to REF, set the memory attributes.  OBJECTP is nonzero
1178    if we are making a new object of this type.  */
1179 extern void set_mem_attributes PARAMS ((rtx, tree, int));
1180 #endif
1181
1182 /* Assemble the static constant template for function entry trampolines.  */
1183 extern rtx assemble_trampoline_template PARAMS ((void));
1184
1185 /* Return 1 if two rtx's are equivalent in structure and elements.  */
1186 extern int rtx_equal_p PARAMS ((rtx, rtx));
1187
1188 /* Given rtx, return new rtx whose address won't be affected by
1189    any side effects.  It has been copied to a new temporary reg.  */
1190 extern rtx stabilize PARAMS ((rtx));
1191
1192 /* Given an rtx, copy all regs it refers to into new temps
1193    and return a modified copy that refers to the new temps.  */
1194 extern rtx copy_all_regs PARAMS ((rtx));
1195
1196 /* Copy given rtx to a new temp reg and return that.  */
1197 extern rtx copy_to_reg PARAMS ((rtx));
1198
1199 /* Like copy_to_reg but always make the reg Pmode.  */
1200 extern rtx copy_addr_to_reg PARAMS ((rtx));
1201
1202 /* Like copy_to_reg but always make the reg the specified mode MODE.  */
1203 extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx));
1204
1205 /* Copy given rtx to given temp reg and return that.  */
1206 extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode));
1207
1208 /* Copy a value to a register if it isn't already a register.
1209    Args are mode (in case value is a constant) and the value.  */
1210 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1211
1212 /* Return given rtx, copied into a new temp reg if it was in memory.  */
1213 extern rtx force_not_mem PARAMS ((rtx));
1214
1215 #ifdef TREE_CODE
1216 /* Return mode and signedness to use when object is promoted.  */
1217 extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode,
1218                                                int *, int));
1219 #endif
1220
1221 /* Remove some bytes from the stack.  An rtx says how many.  */
1222 extern void adjust_stack PARAMS ((rtx));
1223
1224 /* Add some bytes to the stack.  An rtx says how many.  */
1225 extern void anti_adjust_stack PARAMS ((rtx));
1226
1227 /* This enum is used for the following two functions.  */
1228 enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
1229
1230 /* Save the stack pointer at the specified level.  */
1231 extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx));
1232
1233 /* Restore the stack pointer from a save area of the specified level.  */
1234 extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx));
1235
1236 /* Allocate some space on the stack dynamically and return its address.  An rtx
1237    says how many bytes.  */
1238 extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int));
1239
1240 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1241    FIRST is a constant and size is a Pmode RTX.  These are offsets from the
1242    current stack pointer.  STACK_GROWS_DOWNWARD says whether to add or
1243    subtract from the stack.  If SIZE is constant, this is done
1244    with a fixed number of probes.  Otherwise, we must make a loop.  */
1245 extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx));
1246
1247 /* Return an rtx that refers to the value returned by a library call
1248    in its original home.  This becomes invalid if any more code is emitted.  */
1249 extern rtx hard_libcall_value PARAMS ((enum machine_mode));
1250
1251 /* Given an rtx, return an rtx for a value rounded up to a multiple
1252    of STACK_BOUNDARY / BITS_PER_UNIT.  */
1253 extern rtx round_push PARAMS ((rtx));
1254
1255 extern rtx store_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1256                                     unsigned HOST_WIDE_INT,
1257                                     enum machine_mode, rtx,
1258                                     unsigned int, HOST_WIDE_INT));
1259 extern rtx extract_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1260                                       unsigned HOST_WIDE_INT, int, rtx,
1261                                       enum machine_mode, enum machine_mode,
1262                                       unsigned int, HOST_WIDE_INT));
1263 extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int));
1264 extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int));
1265 extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int));
1266
1267 extern rtx assemble_static_space PARAMS ((int));
1268
1269 /* Hook called by expand_expr for language-specific tree codes.
1270    It is up to the language front end to install a hook
1271    if it has any such codes that expand_expr needs to know about.  */
1272 extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
1273                                         enum machine_mode,
1274                                         enum expand_modifier modifier));
1275
1276 #ifdef TREE_CODE
1277 /* Hook called by output_constant for language-specific tree codes.
1278    It is up to the language front-end to install a hook if it has any
1279    such codes that output_constant needs to know about.  Returns a
1280    language-independent constant equivalent to its input.  */
1281 extern tree (*lang_expand_constant) PARAMS ((tree));
1282
1283 extern int safe_from_p PARAMS ((rtx, tree, int));
1284
1285 /* Hook called by safe_from_p for language-specific tree codes.  It is
1286    up to the language front-end to install a hook if it has any such
1287    codes that safe_from_p needs to know about.  Since same_from_p will
1288    recursively explore the TREE_OPERANDs of an expression, this hook
1289    should not reexamine those pieces.  This routine may recursively
1290    call safe_from_p; it should always pass `0' as the TOP_P
1291    parameter.  */
1292 extern int (*lang_safe_from_p) PARAMS ((rtx, tree));
1293 #endif
1294
1295 extern void init_all_optabs                     PARAMS ((void));
1296 extern void do_jump_by_parts_equality_rtx       PARAMS ((rtx, rtx, rtx));
1297 extern void do_jump_by_parts_greater_rtx        PARAMS ((enum machine_mode,
1298                                                          int, rtx, rtx, rtx,
1299                                                          rtx));
1300
1301 #ifdef TREE_CODE   /* Don't lose if tree.h not included.  */
1302 extern void mark_seen_cases                     PARAMS ((tree, unsigned char *,
1303                                                          HOST_WIDE_INT, int));
1304 #endif