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_bcopy,
 493   LTI_memcmp,
 494   LTI_bcmp,
 495   LTI_memset,
 496   LTI_bzero,
 497
 498   LTI_unwind_resume,
 499   LTI_eh_personality,
 500   LTI_setjmp,
 501   LTI_longjmp,
 502   LTI_unwind_sjlj_register,
 503   LTI_unwind_sjlj_unregister,
 504
 505   LTI_eqhf2,
 506   LTI_nehf2,
 507   LTI_gthf2,
 508   LTI_gehf2,
 509   LTI_lthf2,
 510   LTI_lehf2,
 511   LTI_unordhf2,
 512
 513   LTI_eqsf2,
 514   LTI_nesf2,
 515   LTI_gtsf2,
 516   LTI_gesf2,
 517   LTI_ltsf2,
 518   LTI_lesf2,
 519   LTI_unordsf2,
 520
 521   LTI_eqdf2,
 522   LTI_nedf2,
 523   LTI_gtdf2,
 524   LTI_gedf2,
 525   LTI_ltdf2,
 526   LTI_ledf2,
 527   LTI_unorddf2,
 528
 529   LTI_eqxf2,
 530   LTI_nexf2,
 531   LTI_gtxf2,
 532   LTI_gexf2,
 533   LTI_ltxf2,
 534   LTI_lexf2,
 535   LTI_unordxf2,
 536
 537   LTI_eqtf2,
 538   LTI_netf2,
 539   LTI_gttf2,
 540   LTI_getf2,
 541   LTI_lttf2,
 542   LTI_letf2,
 543   LTI_unordtf2,
 544
 545   LTI_floatsisf,
 546   LTI_floatdisf,
 547   LTI_floattisf,
 548
 549   LTI_floatsidf,
 550   LTI_floatdidf,
 551   LTI_floattidf,
 552
 553   LTI_floatsixf,
 554   LTI_floatdixf,
 555   LTI_floattixf,
 556
 557   LTI_floatsitf,
 558   LTI_floatditf,
 559   LTI_floattitf,
 560
 561   LTI_fixsfsi,
 562   LTI_fixsfdi,
 563   LTI_fixsfti,
 564
 565   LTI_fixdfsi,
 566   LTI_fixdfdi,
 567   LTI_fixdfti,
 568
 569   LTI_fixxfsi,
 570   LTI_fixxfdi,
 571   LTI_fixxfti,
 572
 573   LTI_fixtfsi,
 574   LTI_fixtfdi,
 575   LTI_fixtfti,
 576
 577   LTI_fixunssfsi,
 578   LTI_fixunssfdi,
 579   LTI_fixunssfti,
 580
 581   LTI_fixunsdfsi,
 582   LTI_fixunsdfdi,
 583   LTI_fixunsdfti,
 584
 585   LTI_fixunsxfsi,
 586   LTI_fixunsxfdi,
 587   LTI_fixunsxfti,
 588
 589   LTI_fixunstfsi,
 590   LTI_fixunstfdi,
 591   LTI_fixunstfti,
 592
 593   LTI_chkr_check_addr,
 594   LTI_chkr_set_right,
 595   LTI_chkr_copy_bitmap,
 596   LTI_chkr_check_exec,
 597   LTI_chkr_check_str,
 598
 599   LTI_profile_function_entry,
 600   LTI_profile_function_exit,
 601
 602   LTI_MAX
 603 };
 604
 605 /* SYMBOL_REF rtx's for the library functions that are called
 606    implicitly and not via optabs.  */
 607 extern rtx libfunc_table[LTI_MAX];
 608
 609 /* Accessor macros for libfunc_table.  */
 610 #define extendsfdf2_libfunc     (libfunc_table[LTI_extendsfdf2])
 611 #define extendsfxf2_libfunc     (libfunc_table[LTI_extendsfxf2])
 612 #define extendsftf2_libfunc     (libfunc_table[LTI_extendsftf2])
 613 #define extenddfxf2_libfunc     (libfunc_table[LTI_extenddfxf2])
 614 #define extenddftf2_libfunc     (libfunc_table[LTI_extenddftf2])
 615
 616 #define truncdfsf2_libfunc      (libfunc_table[LTI_truncdfsf2])
 617 #define truncxfsf2_libfunc      (libfunc_table[LTI_truncxfsf2])
 618 #define trunctfsf2_libfunc      (libfunc_table[LTI_trunctfsf2])
 619 #define truncxfdf2_libfunc      (libfunc_table[LTI_truncxfdf2])
 620 #define trunctfdf2_libfunc      (libfunc_table[LTI_trunctfdf2])
 621
 622 #define memcpy_libfunc  (libfunc_table[LTI_memcpy])
 623 #define bcopy_libfunc   (libfunc_table[LTI_bcopy])
 624 #define memcmp_libfunc  (libfunc_table[LTI_memcmp])
 625 #define bcmp_libfunc    (libfunc_table[LTI_bcmp])
 626 #define memset_libfunc  (libfunc_table[LTI_memset])
 627 #define bzero_libfunc   (libfunc_table[LTI_bzero])
 628
 629 #define unwind_resume_libfunc   (libfunc_table[LTI_unwind_resume])
 630 #define eh_personality_libfunc  (libfunc_table[LTI_eh_personality])
 631 #define setjmp_libfunc  (libfunc_table[LTI_setjmp])
 632 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
 633 #define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register])
 634 #define unwind_sjlj_unregister_libfunc \
 635   (libfunc_table[LTI_unwind_sjlj_unregister])
 636
 637 #define eqhf2_libfunc   (libfunc_table[LTI_eqhf2])
 638 #define nehf2_libfunc   (libfunc_table[LTI_nehf2])
 639 #define gthf2_libfunc   (libfunc_table[LTI_gthf2])
 640 #define gehf2_libfunc   (libfunc_table[LTI_gehf2])
 641 #define lthf2_libfunc   (libfunc_table[LTI_lthf2])
 642 #define lehf2_libfunc   (libfunc_table[LTI_lehf2])
 643 #define unordhf2_libfunc        (libfunc_table[LTI_unordhf2])
 644
 645 #define eqsf2_libfunc   (libfunc_table[LTI_eqsf2])
 646 #define nesf2_libfunc   (libfunc_table[LTI_nesf2])
 647 #define gtsf2_libfunc   (libfunc_table[LTI_gtsf2])
 648 #define gesf2_libfunc   (libfunc_table[LTI_gesf2])
 649 #define ltsf2_libfunc   (libfunc_table[LTI_ltsf2])
 650 #define lesf2_libfunc   (libfunc_table[LTI_lesf2])
 651 #define unordsf2_libfunc        (libfunc_table[LTI_unordsf2])
 652
 653 #define eqdf2_libfunc   (libfunc_table[LTI_eqdf2])
 654 #define nedf2_libfunc   (libfunc_table[LTI_nedf2])
 655 #define gtdf2_libfunc   (libfunc_table[LTI_gtdf2])
 656 #define gedf2_libfunc   (libfunc_table[LTI_gedf2])
 657 #define ltdf2_libfunc   (libfunc_table[LTI_ltdf2])
 658 #define ledf2_libfunc   (libfunc_table[LTI_ledf2])
 659 #define unorddf2_libfunc        (libfunc_table[LTI_unorddf2])
 660
 661 #define eqxf2_libfunc   (libfunc_table[LTI_eqxf2])
 662 #define nexf2_libfunc   (libfunc_table[LTI_nexf2])
 663 #define gtxf2_libfunc   (libfunc_table[LTI_gtxf2])
 664 #define gexf2_libfunc   (libfunc_table[LTI_gexf2])
 665 #define ltxf2_libfunc   (libfunc_table[LTI_ltxf2])
 666 #define lexf2_libfunc   (libfunc_table[LTI_lexf2])
 667 #define unordxf2_libfunc        (libfunc_table[LTI_unordxf2])
 668
 669 #define eqtf2_libfunc   (libfunc_table[LTI_eqtf2])
 670 #define netf2_libfunc   (libfunc_table[LTI_netf2])
 671 #define gttf2_libfunc   (libfunc_table[LTI_gttf2])
 672 #define getf2_libfunc   (libfunc_table[LTI_getf2])
 673 #define lttf2_libfunc   (libfunc_table[LTI_lttf2])
 674 #define letf2_libfunc   (libfunc_table[LTI_letf2])
 675 #define unordtf2_libfunc        (libfunc_table[LTI_unordtf2])
 676
 677 #define floatsisf_libfunc       (libfunc_table[LTI_floatsisf])
 678 #define floatdisf_libfunc       (libfunc_table[LTI_floatdisf])
 679 #define floattisf_libfunc       (libfunc_table[LTI_floattisf])
 680
 681 #define floatsidf_libfunc       (libfunc_table[LTI_floatsidf])
 682 #define floatdidf_libfunc       (libfunc_table[LTI_floatdidf])
 683 #define floattidf_libfunc       (libfunc_table[LTI_floattidf])
 684
 685 #define floatsixf_libfunc       (libfunc_table[LTI_floatsixf])
 686 #define floatdixf_libfunc       (libfunc_table[LTI_floatdixf])
 687 #define floattixf_libfunc       (libfunc_table[LTI_floattixf])
 688
 689 #define floatsitf_libfunc       (libfunc_table[LTI_floatsitf])
 690 #define floatditf_libfunc       (libfunc_table[LTI_floatditf])
 691 #define floattitf_libfunc       (libfunc_table[LTI_floattitf])
 692
 693 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
 694 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
 695 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
 696
 697 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
 698 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
 699 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
 700
 701 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
 702 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
 703 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
 704
 705 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
 706 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
 707 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
 708
 709 #define fixunssfsi_libfunc      (libfunc_table[LTI_fixunssfsi])
 710 #define fixunssfdi_libfunc      (libfunc_table[LTI_fixunssfdi])
 711 #define fixunssfti_libfunc      (libfunc_table[LTI_fixunssfti])
 712
 713 #define fixunsdfsi_libfunc      (libfunc_table[LTI_fixunsdfsi])
 714 #define fixunsdfdi_libfunc      (libfunc_table[LTI_fixunsdfdi])
 715 #define fixunsdfti_libfunc      (libfunc_table[LTI_fixunsdfti])
 716
 717 #define fixunsxfsi_libfunc      (libfunc_table[LTI_fixunsxfsi])
 718 #define fixunsxfdi_libfunc      (libfunc_table[LTI_fixunsxfdi])
 719 #define fixunsxfti_libfunc      (libfunc_table[LTI_fixunsxfti])
 720
 721 #define fixunstfsi_libfunc      (libfunc_table[LTI_fixunstfsi])
 722 #define fixunstfdi_libfunc      (libfunc_table[LTI_fixunstfdi])
 723 #define fixunstfti_libfunc      (libfunc_table[LTI_fixunstfti])
 724
 725 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
 726 #define chkr_set_right_libfunc  (libfunc_table[LTI_chkr_set_right])
 727 #define chkr_copy_bitmap_libfunc        (libfunc_table[LTI_chkr_copy_bitmap])
 728 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
 729 #define chkr_check_str_libfunc  (libfunc_table[LTI_chkr_check_str])
 730
 731 #define profile_function_entry_libfunc  (libfunc_table[LTI_profile_function_entry])
 732 #define profile_function_exit_libfunc   (libfunc_table[LTI_profile_function_exit])
 733 \f
 734 typedef rtx (*rtxfun) PARAMS ((rtx));
 735
 736 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 737    gives the gen_function to make a branch to test that condition.  */
 738
 739 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 740
 741 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 742    gives the insn code to make a store-condition insn
 743    to test that condition.  */
 744
 745 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 746
 747 #ifdef HAVE_conditional_move
 748 /* Indexed by the machine mode, gives the insn code to make a conditional
 749    move insn.  */
 750
 751 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 752 #endif
 753
 754 /* This array records the insn_code of insns to perform block moves.  */
 755 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 756
 757 /* This array records the insn_code of insns to perform block clears.  */
 758 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 759
 760 /* Define functions given in optabs.c.  */
 761
 762 /* Expand a binary operation given optab and rtx operands.  */
 763 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
 764                                  int, enum optab_methods));
 765
 766 /* Expand a binary operation with both signed and unsigned forms.  */
 767 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
 768                                       rtx, rtx, int, enum optab_methods));
 769
 770 /* Generate code to perform an operation on two operands with two results.  */
 771 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
 772
 773 /* Expand a unary arithmetic operation given optab rtx operand.  */
 774 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
 775
 776 /* Expand the absolute value operation.  */
 777 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
 778
 779 /* Expand the complex absolute value operation.  */
 780 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 781
 782 /* Generate an instruction with a given INSN_CODE with an output and
 783    an input.  */
 784 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
 785
 786 /* Emit code to perform a series of operations on a multi-word quantity, one
 787    word at a time.  */
 788 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
 789
 790 /* Emit code to make a call to a constant function or a library call. */
 791 extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx));
 792
 793 /* Emit one rtl instruction to store zero in specified rtx.  */
 794 extern void emit_clr_insn PARAMS ((rtx));
 795
 796 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 797 extern void emit_0_to_1_insn PARAMS ((rtx));
 798
 799 /* Emit one rtl insn to compare two rtx's.  */
 800 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
 801                                    enum machine_mode, int, unsigned int));
 802
 803 /* Emit a pair of rtl insns to compare two rtx's and to jump
 804    to a label if the comparison is true.  */
 805 extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx,
 806                                              enum machine_mode, int,
 807                                              unsigned int, rtx));
 808
 809 /* The various uses that a comparison can have; used by can_compare_p:
 810    jumps, conditional moves, store flag operations.  */
 811 enum can_compare_purpose
 812 {
 813   ccp_jump,
 814   ccp_cmov,
 815   ccp_store_flag
 816 };
 817
 818 /* Nonzero if a compare of mode MODE can be done straightforwardly
 819    (without splitting it into pieces).  */
 820 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
 821                                   enum can_compare_purpose));
 822
 823 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
 824                                       enum machine_mode *, int *, int,
 825                                       enum can_compare_purpose));
 826
 827 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
 828                                     enum machine_mode, int));
 829
 830 /* Generate code to indirectly jump to a location given in the rtx LOC.  */
 831 extern void emit_indirect_jump PARAMS ((rtx));
 832
 833 #ifdef HAVE_conditional_move
 834 /* Emit a conditional move operation.  */
 835 rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx,
 836                                    enum machine_mode, rtx, rtx,
 837                                    enum machine_mode, int));
 838
 839 /* Return non-zero if the conditional move is supported.  */
 840 int can_conditionally_move_p PARAMS ((enum machine_mode mode));
 841
 842 #endif
 843
 844 /* Create but don't emit one rtl instruction to add one rtx into another.
 845    Modes must match; operands must meet the operation's predicates.
 846    Likewise for subtraction and for just copying.
 847    These do not call protect_from_queue; caller must do so.  */
 848 extern rtx gen_add2_insn PARAMS ((rtx, rtx));
 849 extern rtx gen_sub2_insn PARAMS ((rtx, rtx));
 850 extern rtx gen_move_insn PARAMS ((rtx, rtx));
 851 extern int have_add2_insn PARAMS ((enum machine_mode));
 852 extern int have_sub2_insn PARAMS ((enum machine_mode));
 853
 854 /* Return the INSN_CODE to use for an extend operation.  */
 855 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
 856                                             enum machine_mode, int));
 857
 858 /* Generate the body of an insn to extend Y (with mode MFROM)
 859    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 860 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
 861                                     enum machine_mode, int));
 862
 863 /* Initialize the tables that control conversion between fixed and
 864    floating values.  */
 865 extern void init_fixtab PARAMS ((void));
 866 extern void init_floattab PARAMS ((void));
 867
 868 /* Generate code for a FLOAT_EXPR.  */
 869 extern void expand_float PARAMS ((rtx, rtx, int));
 870
 871 /* Generate code for a FIX_EXPR.  */
 872 extern void expand_fix PARAMS ((rtx, rtx, int));
 873
 874 /* Call this to initialize an optab function entry.  */
 875 extern rtx init_one_libfunc PARAMS ((const char *));
 876
 877 /* Call this once to initialize the contents of the optabs
 878    appropriately for the current target machine.  */
 879 extern void init_optabs PARAMS ((void));
 880 \f
 881 /* Functions from expmed.c:  */
 882
 883 /* Arguments MODE, RTX: return an rtx for the negation of that value.
 884    May emit insns.  */
 885 extern rtx negate_rtx PARAMS ((enum machine_mode, rtx));
 886
 887 /* Expand a logical AND operation.  */
 888 extern rtx expand_and PARAMS ((rtx, rtx, rtx));
 889
 890 /* Emit a store-flag operation.  */
 891 extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx,
 892                                     enum machine_mode, int, int));
 893
 894 /* Like emit_store_flag, but always succeeds.  */
 895 extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx,
 896                                           enum machine_mode, int, int));
 897
 898 /* Functions from loop.c:  */
 899
 900 /* Given an insn and condition, return a canonical description of
 901    the test being made.  */
 902 extern rtx canonicalize_condition PARAMS ((rtx, rtx, int, rtx *, rtx));
 903
 904 /* Given a JUMP_INSN, return a canonical description of the test
 905    being made.  */
 906 extern rtx get_condition PARAMS ((rtx, rtx *));
 907
 908 /* Generate a conditional trap instruction.  */
 909 extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx));
 910 \f
 911 /* Functions from builtins.c:  */
 912 #ifdef TREE_CODE
 913 extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 914 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
 915 extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx));
 916 extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree));
 917 extern rtx expand_builtin_va_arg PARAMS ((tree, tree));
 918 #endif
 919
 920 extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx));
 921 extern void expand_builtin_setjmp_receiver PARAMS ((rtx));
 922 extern void expand_builtin_longjmp PARAMS ((rtx, rtx));
 923 extern rtx expand_builtin_saveregs PARAMS ((void));
 924 extern HOST_WIDE_INT get_varargs_alias_set PARAMS ((void));
 925 extern HOST_WIDE_INT get_frame_alias_set PARAMS ((void));
 926 extern void record_base_value           PARAMS ((unsigned int, rtx, int));
 927 extern void record_alias_subset         PARAMS ((HOST_WIDE_INT,
 928                                                  HOST_WIDE_INT));
 929 extern HOST_WIDE_INT new_alias_set              PARAMS ((void));
 930 \f
 931 /* Functions from expr.c:  */
 932
 933 /* This is run once per compilation to set up which modes can be used
 934    directly in memory and to initialize the block move optab.  */
 935 extern void init_expr_once PARAMS ((void));
 936
 937 /* This is run at the start of compiling a function.  */
 938 extern void init_expr PARAMS ((void));
 939
 940 /* This function is run once to initialize stor-layout.c.  */
 941
 942 extern void init_stor_layout_once PARAMS ((void));
 943
 944 /* This is run at the end of compiling a function.  */
 945 extern void finish_expr_for_function PARAMS ((void));
 946
 947 /* Use protect_from_queue to convert a QUEUED expression
 948    into something that you can put immediately into an instruction.  */
 949 extern rtx protect_from_queue PARAMS ((rtx, int));
 950
 951 /* Perform all the pending incrementations.  */
 952 extern void emit_queue PARAMS ((void));
 953
 954 /* Tell if something has a queued subexpression.  */
 955 extern int queued_subexp_p PARAMS ((rtx));
 956
 957 /* Emit some rtl insns to move data between rtx's, converting machine modes.
 958    Both modes must be floating or both fixed.  */
 959 extern void convert_move PARAMS ((rtx, rtx, int));
 960
 961 /* Convert an rtx to specified machine mode and return the result.  */
 962 extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int));
 963
 964 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 965 extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode,
 966                                   rtx, int));
 967
 968 /* Emit code to move a block Y to a block X.  */
 969 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, unsigned int));
 970
 971 /* Copy all or part of a value X into registers starting at REGNO.
 972    The number of registers to be filled is NREGS.  */
 973 extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode));
 974
 975 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
 976    The number of registers to be filled is NREGS.  */
 977 extern void move_block_from_reg PARAMS ((int, rtx, int, int));
 978
 979 /* Load a BLKmode value into non-consecutive registers represented by a
 980    PARALLEL.  */
 981 extern void emit_group_load PARAMS ((rtx, rtx, int, unsigned int));
 982
 983 /* Store a BLKmode value from non-consecutive registers represented by a
 984    PARALLEL.  */
 985 extern void emit_group_store PARAMS ((rtx, rtx, int, unsigned int));
 986
 987 #ifdef TREE_CODE
 988 /* Copy BLKmode object from a set of registers. */
 989 extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree));
 990 #endif
 991
 992 /* Mark REG as holding a parameter for the next CALL_INSN.  */
 993 extern void use_reg PARAMS ((rtx *, rtx));
 994
 995 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
 996    for the next CALL_INSN.  */
 997 extern void use_regs PARAMS ((rtx *, int, int));
 998
 999 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
1000 extern void use_group_regs PARAMS ((rtx *, rtx));
1001
1002 /* Write zeros through the storage of OBJECT.
1003    If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
1004    alignment.  */
1005 extern rtx clear_storage PARAMS ((rtx, rtx, unsigned int));
1006
1007 /* Return non-zero if it is desirable to store LEN bytes generated by
1008    CONSTFUN with several move instructions by store_by_pieces
1009    function.  CONSTFUNDATA is a pointer which will be passed as argument
1010    in every CONSTFUN call.
1011    ALIGN is maximum alignment we can assume.  */
1012 extern int can_store_by_pieces PARAMS ((unsigned HOST_WIDE_INT,
1013                                         rtx (*) (PTR, HOST_WIDE_INT,
1014                                                  enum machine_mode),
1015                                         PTR, unsigned int));
1016
1017 /* Generate several move instructions to store LEN bytes generated by
1018    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
1019    pointer which will be passed as argument in every CONSTFUN call.
1020    ALIGN is maximum alignment we can assume.  */
1021 extern void store_by_pieces PARAMS ((rtx, unsigned HOST_WIDE_INT,
1022                                      rtx (*) (PTR, HOST_WIDE_INT,
1023                                               enum machine_mode),
1024                                      PTR, unsigned int));
1025
1026 /* Emit insns to set X from Y.  */
1027 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1028
1029 /* Emit insns to set X from Y, with no frills.  */
1030 extern rtx emit_move_insn_1 PARAMS ((rtx, rtx));
1031
1032 /* Push a block of length SIZE (perhaps variable)
1033    and return an rtx to address the beginning of the block.  */
1034 extern rtx push_block PARAMS ((rtx, int, int));
1035
1036 #ifdef TREE_CODE
1037 /* Generate code to push something onto the stack, given its mode and type.  */
1038 extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx,
1039                                     unsigned int, int, rtx, int, rtx, rtx,
1040                                     int, rtx));
1041
1042 /* Expand an assignment that stores the value of FROM into TO. */
1043 extern rtx expand_assignment PARAMS ((tree, tree, int, int));
1044
1045 /* Generate code for computing expression EXP,
1046    and storing the value into TARGET.
1047    If SUGGEST_REG is nonzero, copy the value through a register
1048    and return that register, if that is possible.  */
1049 extern rtx store_expr PARAMS ((tree, rtx, int));
1050 #endif
1051
1052 /* Given an rtx that may include add and multiply operations,
1053    generate them as insns and return a pseudo-reg containing the value.
1054    Useful after calling expand_expr with 1 as sum_ok.  */
1055 extern rtx force_operand PARAMS ((rtx, rtx));
1056
1057 #ifdef TREE_CODE
1058 /* Generate code for computing expression EXP.
1059    An rtx for the computed value is returned.  The value is never null.
1060    In the case of a void EXP, const0_rtx is returned.  */
1061 extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode,
1062                                 enum expand_modifier));
1063 #endif
1064
1065 /* At the start of a function, record that we have no previously-pushed
1066    arguments waiting to be popped.  */
1067 extern void init_pending_stack_adjust PARAMS ((void));
1068
1069 /* When exiting from function, if safe, clear out any pending stack adjust
1070    so the adjustment won't get done.  */
1071 extern void clear_pending_stack_adjust PARAMS ((void));
1072
1073 /* Pop any previously-pushed arguments that have not been popped yet.  */
1074 extern void do_pending_stack_adjust PARAMS ((void));
1075
1076 #ifdef TREE_CODE
1077 /* Return the tree node and offset if a given argument corresponds to
1078    a string constant.  */
1079 extern tree string_constant PARAMS ((tree, tree *));
1080
1081 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
1082 extern void jumpifnot PARAMS ((tree, rtx));
1083
1084 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
1085 extern void jumpif PARAMS ((tree, rtx));
1086
1087 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1088    the result is zero, or IF_TRUE_LABEL if the result is one.  */
1089 extern void do_jump PARAMS ((tree, rtx, rtx));
1090 #endif
1091
1092 /* Generate rtl to compare two rtx's, will call emit_cmp_insn.  */
1093 extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int,
1094                                      enum machine_mode, rtx, unsigned int));
1095 extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int,
1096                                              enum machine_mode, rtx,
1097                                              unsigned int, rtx, rtx));
1098
1099 /* Generate a tablejump instruction (used for switch statements).  */
1100 extern void do_tablejump PARAMS ((rtx, enum machine_mode, rtx, rtx, rtx));
1101 \f
1102 #ifdef TREE_CODE
1103 /* rtl.h and tree.h were included.  */
1104 /* Return an rtx for the size in bytes of the value of an expr.  */
1105 extern rtx expr_size PARAMS ((tree));
1106
1107 extern rtx lookup_static_chain PARAMS ((tree));
1108
1109 /* Convert a stack slot address ADDR valid in function FNDECL
1110    into an address valid in this function (using a static chain).  */
1111 extern rtx fix_lexical_addr PARAMS ((rtx, tree));
1112
1113 /* Return the address of the trampoline for entering nested fn FUNCTION.  */
1114 extern rtx trampoline_address PARAMS ((tree));
1115
1116 /* Return an rtx that refers to the value returned by a function
1117    in its original home.  This becomes invalid if any more code is emitted.  */
1118 extern rtx hard_function_value PARAMS ((tree, tree, int));
1119
1120 extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int));
1121
1122 extern rtx expand_call PARAMS ((tree, rtx, int));
1123
1124 extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree,
1125                                  rtx, int));
1126 extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx,
1127                                   rtx, rtx, int));
1128 extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree,
1129                                          struct args_size *,
1130                                          struct args_size *,
1131                                          struct args_size *,
1132                                          struct args_size *));
1133 extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx));
1134
1135 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary.  */
1136 extern rtx label_rtx PARAMS ((tree));
1137 #endif
1138
1139 /* Indicate how an input argument register was promoted.  */
1140 extern rtx promoted_input_arg PARAMS ((unsigned int, enum machine_mode *,
1141                                        int *));
1142
1143 /* Return an rtx like arg but sans any constant terms.
1144    Returns the original rtx if it has no constant terms.
1145    The constant terms are added and stored via a second arg.  */
1146 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1147
1148 /* Convert arg to a valid memory address for specified machine mode,
1149    by emitting insns to perform arithmetic if nec.  */
1150 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1151
1152 /* Like `memory_address' but pretent `flag_force_addr' is 0.  */
1153 extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx));
1154
1155 /* Return a memory reference like MEMREF, but with its mode changed
1156    to MODE and its address changed to ADDR.
1157    (VOIDmode means don't change the mode.
1158    NULL for ADDR means don't change the address.)  */
1159 extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx));
1160
1161 /* Return a memory reference like MEMREF, but which is known to have a
1162    valid address.  */
1163 extern rtx validize_mem PARAMS ((rtx));
1164
1165 #ifdef TREE_CODE
1166 /* Given REF, either a MEM or a REG, and T, either the type of X or
1167    the expression corresponding to REF, set RTX_UNCHANGING_P if
1168    appropriate.  */
1169 extern void maybe_set_unchanging PARAMS ((rtx, tree));
1170
1171 /* Given REF, a MEM, and T, either the type of X or the expression
1172    corresponding to REF, set the memory attributes.  OBJECTP is nonzero
1173    if we are making a new object of this type.  */
1174 extern void set_mem_attributes PARAMS ((rtx, tree, int));
1175 #endif
1176
1177 /* Assemble the static constant template for function entry trampolines.  */
1178 extern rtx assemble_trampoline_template PARAMS ((void));
1179
1180 /* Return 1 if two rtx's are equivalent in structure and elements.  */
1181 extern int rtx_equal_p PARAMS ((rtx, rtx));
1182
1183 /* Given rtx, return new rtx whose address won't be affected by
1184    any side effects.  It has been copied to a new temporary reg.  */
1185 extern rtx stabilize PARAMS ((rtx));
1186
1187 /* Given an rtx, copy all regs it refers to into new temps
1188    and return a modified copy that refers to the new temps.  */
1189 extern rtx copy_all_regs PARAMS ((rtx));
1190
1191 /* Copy given rtx to a new temp reg and return that.  */
1192 extern rtx copy_to_reg PARAMS ((rtx));
1193
1194 /* Like copy_to_reg but always make the reg Pmode.  */
1195 extern rtx copy_addr_to_reg PARAMS ((rtx));
1196
1197 /* Like copy_to_reg but always make the reg the specified mode MODE.  */
1198 extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx));
1199
1200 /* Copy given rtx to given temp reg and return that.  */
1201 extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode));
1202
1203 /* Copy a value to a register if it isn't already a register.
1204    Args are mode (in case value is a constant) and the value.  */
1205 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1206
1207 /* Return given rtx, copied into a new temp reg if it was in memory.  */
1208 extern rtx force_not_mem PARAMS ((rtx));
1209
1210 #ifdef TREE_CODE
1211 /* Return mode and signedness to use when object is promoted.  */
1212 extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode,
1213                                                int *, int));
1214 #endif
1215
1216 /* Remove some bytes from the stack.  An rtx says how many.  */
1217 extern void adjust_stack PARAMS ((rtx));
1218
1219 /* Add some bytes to the stack.  An rtx says how many.  */
1220 extern void anti_adjust_stack PARAMS ((rtx));
1221
1222 /* This enum is used for the following two functions.  */
1223 enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
1224
1225 /* Save the stack pointer at the specified level.  */
1226 extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx));
1227
1228 /* Restore the stack pointer from a save area of the specified level.  */
1229 extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx));
1230
1231 /* Allocate some space on the stack dynamically and return its address.  An rtx
1232    says how many bytes.  */
1233 extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int));
1234
1235 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1236    FIRST is a constant and size is a Pmode RTX.  These are offsets from the
1237    current stack pointer.  STACK_GROWS_DOWNWARD says whether to add or
1238    subtract from the stack.  If SIZE is constant, this is done
1239    with a fixed number of probes.  Otherwise, we must make a loop.  */
1240 extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx));
1241
1242 /* Return an rtx that refers to the value returned by a library call
1243    in its original home.  This becomes invalid if any more code is emitted.  */
1244 extern rtx hard_libcall_value PARAMS ((enum machine_mode));
1245
1246 /* Given an rtx, return an rtx for a value rounded up to a multiple
1247    of STACK_BOUNDARY / BITS_PER_UNIT.  */
1248 extern rtx round_push PARAMS ((rtx));
1249
1250 extern rtx store_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1251                                     unsigned HOST_WIDE_INT,
1252                                     enum machine_mode, rtx,
1253                                     unsigned int, HOST_WIDE_INT));
1254 extern rtx extract_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1255                                       unsigned HOST_WIDE_INT, int, rtx,
1256                                       enum machine_mode, enum machine_mode,
1257                                       unsigned int, HOST_WIDE_INT));
1258 extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int));
1259 extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int));
1260 extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int));
1261
1262 extern rtx assemble_static_space PARAMS ((int));
1263
1264 /* Hook called by expand_expr for language-specific tree codes.
1265    It is up to the language front end to install a hook
1266    if it has any such codes that expand_expr needs to know about.  */
1267 extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
1268                                         enum machine_mode,
1269                                         enum expand_modifier modifier));
1270
1271 #ifdef TREE_CODE
1272 /* Hook called by output_constant for language-specific tree codes.
1273    It is up to the language front-end to install a hook if it has any
1274    such codes that output_constant needs to know about.  Returns a
1275    language-independent constant equivalent to its input.  */
1276 extern tree (*lang_expand_constant) PARAMS ((tree));
1277
1278 extern int safe_from_p PARAMS ((rtx, tree, int));
1279
1280 /* Hook called by safe_from_p for language-specific tree codes.  It is
1281    up to the language front-end to install a hook if it has any such
1282    codes that safe_from_p needs to know about.  Since same_from_p will
1283    recursively explore the TREE_OPERANDs of an expression, this hook
1284    should not reexamine those pieces.  This routine may recursively
1285    call safe_from_p; it should always pass `0' as the TOP_P
1286    parameter.  */
1287 extern int (*lang_safe_from_p) PARAMS ((rtx, tree));
1288 #endif
1289
1290 extern void init_all_optabs                     PARAMS ((void));
1291 extern void do_jump_by_parts_equality_rtx       PARAMS ((rtx, rtx, rtx));
1292 extern void do_jump_by_parts_greater_rtx        PARAMS ((enum machine_mode,
1293                                                          int, rtx, rtx, rtx,
1294                                                          rtx));
1295
1296 #ifdef TREE_CODE   /* Don't lose if tree.h not included.  */
1297 extern void mark_seen_cases                     PARAMS ((tree, unsigned char *,
1298                                                          HOST_WIDE_INT, int));
1299 #endif