gcc/expr.h

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