gcc/expr.h

   1 /* Definitions for code generation pass of GNU compiler.
   2    Copyright (C) 1987, 91-99, 2000 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   LTI_unordhf2,
 503
 504   LTI_eqsf2,
 505   LTI_nesf2,
 506   LTI_gtsf2,
 507   LTI_gesf2,
 508   LTI_ltsf2,
 509   LTI_lesf2,
 510   LTI_unordsf2,
 511
 512   LTI_eqdf2,
 513   LTI_nedf2,
 514   LTI_gtdf2,
 515   LTI_gedf2,
 516   LTI_ltdf2,
 517   LTI_ledf2,
 518   LTI_unorddf2,
 519
 520   LTI_eqxf2,
 521   LTI_nexf2,
 522   LTI_gtxf2,
 523   LTI_gexf2,
 524   LTI_ltxf2,
 525   LTI_lexf2,
 526   LTI_unordxf2,
 527
 528   LTI_eqtf2,
 529   LTI_netf2,
 530   LTI_gttf2,
 531   LTI_getf2,
 532   LTI_lttf2,
 533   LTI_letf2,
 534   LTI_unordtf2,
 535
 536   LTI_floatsisf,
 537   LTI_floatdisf,
 538   LTI_floattisf,
 539
 540   LTI_floatsidf,
 541   LTI_floatdidf,
 542   LTI_floattidf,
 543
 544   LTI_floatsixf,
 545   LTI_floatdixf,
 546   LTI_floattixf,
 547
 548   LTI_floatsitf,
 549   LTI_floatditf,
 550   LTI_floattitf,
 551
 552   LTI_fixsfsi,
 553   LTI_fixsfdi,
 554   LTI_fixsfti,
 555
 556   LTI_fixdfsi,
 557   LTI_fixdfdi,
 558   LTI_fixdfti,
 559
 560   LTI_fixxfsi,
 561   LTI_fixxfdi,
 562   LTI_fixxfti,
 563
 564   LTI_fixtfsi,
 565   LTI_fixtfdi,
 566   LTI_fixtfti,
 567
 568   LTI_fixunssfsi,
 569   LTI_fixunssfdi,
 570   LTI_fixunssfti,
 571
 572   LTI_fixunsdfsi,
 573   LTI_fixunsdfdi,
 574   LTI_fixunsdfti,
 575
 576   LTI_fixunsxfsi,
 577   LTI_fixunsxfdi,
 578   LTI_fixunsxfti,
 579
 580   LTI_fixunstfsi,
 581   LTI_fixunstfdi,
 582   LTI_fixunstfti,
 583
 584   LTI_chkr_check_addr,
 585   LTI_chkr_set_right,
 586   LTI_chkr_copy_bitmap,
 587   LTI_chkr_check_exec,
 588   LTI_chkr_check_str,
 589
 590   LTI_profile_function_entry,
 591   LTI_profile_function_exit,
 592
 593   LTI_MAX
 594 };
 595
 596 /* SYMBOL_REF rtx's for the library functions that are called
 597    implicitly and not via optabs.  */
 598 extern rtx libfunc_table[LTI_MAX];
 599
 600 /* Accessor macros for libfunc_table.  */
 601 #define extendsfdf2_libfunc     (libfunc_table[LTI_extendsfdf2])
 602 #define extendsfxf2_libfunc     (libfunc_table[LTI_extendsfxf2])
 603 #define extendsftf2_libfunc     (libfunc_table[LTI_extendsftf2])
 604 #define extenddfxf2_libfunc     (libfunc_table[LTI_extenddfxf2])
 605 #define extenddftf2_libfunc     (libfunc_table[LTI_extenddftf2])
 606
 607 #define truncdfsf2_libfunc      (libfunc_table[LTI_truncdfsf2])
 608 #define truncxfsf2_libfunc      (libfunc_table[LTI_truncxfsf2])
 609 #define trunctfsf2_libfunc      (libfunc_table[LTI_trunctfsf2])
 610 #define truncxfdf2_libfunc      (libfunc_table[LTI_truncxfdf2])
 611 #define trunctfdf2_libfunc      (libfunc_table[LTI_trunctfdf2])
 612
 613 #define memcpy_libfunc  (libfunc_table[LTI_memcpy])
 614 #define bcopy_libfunc   (libfunc_table[LTI_bcopy])
 615 #define memcmp_libfunc  (libfunc_table[LTI_memcmp])
 616 #define bcmp_libfunc    (libfunc_table[LTI_bcmp])
 617 #define memset_libfunc  (libfunc_table[LTI_memset])
 618 #define bzero_libfunc   (libfunc_table[LTI_bzero])
 619
 620 #define throw_libfunc   (libfunc_table[LTI_throw])
 621 #define rethrow_libfunc (libfunc_table[LTI_rethrow])
 622 #define sjthrow_libfunc (libfunc_table[LTI_sjthrow])
 623 #define sjpopnthrow_libfunc     (libfunc_table[LTI_sjpopnthrow])
 624 #define terminate_libfunc       (libfunc_table[LTI_terminate])
 625 #define setjmp_libfunc  (libfunc_table[LTI_setjmp])
 626 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
 627 #define eh_rtime_match_libfunc  (libfunc_table[LTI_eh_rtime_match])
 628
 629 #define eqhf2_libfunc   (libfunc_table[LTI_eqhf2])
 630 #define nehf2_libfunc   (libfunc_table[LTI_nehf2])
 631 #define gthf2_libfunc   (libfunc_table[LTI_gthf2])
 632 #define gehf2_libfunc   (libfunc_table[LTI_gehf2])
 633 #define lthf2_libfunc   (libfunc_table[LTI_lthf2])
 634 #define lehf2_libfunc   (libfunc_table[LTI_lehf2])
 635 #define unordhf2_libfunc        (libfunc_table[LTI_unordhf2])
 636
 637 #define eqsf2_libfunc   (libfunc_table[LTI_eqsf2])
 638 #define nesf2_libfunc   (libfunc_table[LTI_nesf2])
 639 #define gtsf2_libfunc   (libfunc_table[LTI_gtsf2])
 640 #define gesf2_libfunc   (libfunc_table[LTI_gesf2])
 641 #define ltsf2_libfunc   (libfunc_table[LTI_ltsf2])
 642 #define lesf2_libfunc   (libfunc_table[LTI_lesf2])
 643 #define unordsf2_libfunc        (libfunc_table[LTI_unordsf2])
 644
 645 #define eqdf2_libfunc   (libfunc_table[LTI_eqdf2])
 646 #define nedf2_libfunc   (libfunc_table[LTI_nedf2])
 647 #define gtdf2_libfunc   (libfunc_table[LTI_gtdf2])
 648 #define gedf2_libfunc   (libfunc_table[LTI_gedf2])
 649 #define ltdf2_libfunc   (libfunc_table[LTI_ltdf2])
 650 #define ledf2_libfunc   (libfunc_table[LTI_ledf2])
 651 #define unorddf2_libfunc        (libfunc_table[LTI_unorddf2])
 652
 653 #define eqxf2_libfunc   (libfunc_table[LTI_eqxf2])
 654 #define nexf2_libfunc   (libfunc_table[LTI_nexf2])
 655 #define gtxf2_libfunc   (libfunc_table[LTI_gtxf2])
 656 #define gexf2_libfunc   (libfunc_table[LTI_gexf2])
 657 #define ltxf2_libfunc   (libfunc_table[LTI_ltxf2])
 658 #define lexf2_libfunc   (libfunc_table[LTI_lexf2])
 659 #define unordxf2_libfunc        (libfunc_table[LTI_unordxf2])
 660
 661 #define eqtf2_libfunc   (libfunc_table[LTI_eqtf2])
 662 #define netf2_libfunc   (libfunc_table[LTI_netf2])
 663 #define gttf2_libfunc   (libfunc_table[LTI_gttf2])
 664 #define getf2_libfunc   (libfunc_table[LTI_getf2])
 665 #define lttf2_libfunc   (libfunc_table[LTI_lttf2])
 666 #define letf2_libfunc   (libfunc_table[LTI_letf2])
 667 #define unordtf2_libfunc        (libfunc_table[LTI_unordtf2])
 668
 669 #define floatsisf_libfunc       (libfunc_table[LTI_floatsisf])
 670 #define floatdisf_libfunc       (libfunc_table[LTI_floatdisf])
 671 #define floattisf_libfunc       (libfunc_table[LTI_floattisf])
 672
 673 #define floatsidf_libfunc       (libfunc_table[LTI_floatsidf])
 674 #define floatdidf_libfunc       (libfunc_table[LTI_floatdidf])
 675 #define floattidf_libfunc       (libfunc_table[LTI_floattidf])
 676
 677 #define floatsixf_libfunc       (libfunc_table[LTI_floatsixf])
 678 #define floatdixf_libfunc       (libfunc_table[LTI_floatdixf])
 679 #define floattixf_libfunc       (libfunc_table[LTI_floattixf])
 680
 681 #define floatsitf_libfunc       (libfunc_table[LTI_floatsitf])
 682 #define floatditf_libfunc       (libfunc_table[LTI_floatditf])
 683 #define floattitf_libfunc       (libfunc_table[LTI_floattitf])
 684
 685 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
 686 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
 687 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
 688
 689 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
 690 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
 691 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
 692
 693 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
 694 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
 695 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
 696
 697 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
 698 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
 699 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
 700
 701 #define fixunssfsi_libfunc      (libfunc_table[LTI_fixunssfsi])
 702 #define fixunssfdi_libfunc      (libfunc_table[LTI_fixunssfdi])
 703 #define fixunssfti_libfunc      (libfunc_table[LTI_fixunssfti])
 704
 705 #define fixunsdfsi_libfunc      (libfunc_table[LTI_fixunsdfsi])
 706 #define fixunsdfdi_libfunc      (libfunc_table[LTI_fixunsdfdi])
 707 #define fixunsdfti_libfunc      (libfunc_table[LTI_fixunsdfti])
 708
 709 #define fixunsxfsi_libfunc      (libfunc_table[LTI_fixunsxfsi])
 710 #define fixunsxfdi_libfunc      (libfunc_table[LTI_fixunsxfdi])
 711 #define fixunsxfti_libfunc      (libfunc_table[LTI_fixunsxfti])
 712
 713 #define fixunstfsi_libfunc      (libfunc_table[LTI_fixunstfsi])
 714 #define fixunstfdi_libfunc      (libfunc_table[LTI_fixunstfdi])
 715 #define fixunstfti_libfunc      (libfunc_table[LTI_fixunstfti])
 716
 717 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
 718 #define chkr_set_right_libfunc  (libfunc_table[LTI_chkr_set_right])
 719 #define chkr_copy_bitmap_libfunc        (libfunc_table[LTI_chkr_copy_bitmap])
 720 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
 721 #define chkr_check_str_libfunc  (libfunc_table[LTI_chkr_check_str])
 722
 723 #define profile_function_entry_libfunc  (libfunc_table[LTI_profile_function_entry])
 724 #define profile_function_exit_libfunc   (libfunc_table[LTI_profile_function_exit])
 725 \f
 726 typedef rtx (*rtxfun) PARAMS ((rtx));
 727
 728 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 729    gives the gen_function to make a branch to test that condition.  */
 730
 731 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 732
 733 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 734    gives the insn code to make a store-condition insn
 735    to test that condition.  */
 736
 737 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 738
 739 #ifdef HAVE_conditional_move
 740 /* Indexed by the machine mode, gives the insn code to make a conditional
 741    move insn.  */
 742
 743 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 744 #endif
 745
 746 /* This array records the insn_code of insns to perform block moves.  */
 747 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 748
 749 /* This array records the insn_code of insns to perform block clears.  */
 750 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 751
 752 /* Define functions given in optabs.c.  */
 753
 754 /* Expand a binary operation given optab and rtx operands.  */
 755 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
 756                                  int, enum optab_methods));
 757
 758 /* Expand a binary operation with both signed and unsigned forms.  */
 759 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
 760                                       rtx, rtx, int, enum optab_methods));
 761
 762 /* Generate code to perform an operation on two operands with two results.  */
 763 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
 764
 765 /* Expand a unary arithmetic operation given optab rtx operand.  */
 766 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
 767
 768 /* Expand the absolute value operation.  */
 769 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 770
 771 /* Expand the complex absolute value operation.  */
 772 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 773
 774 /* Generate an instruction with a given INSN_CODE with an output and
 775    an input.  */
 776 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
 777
 778 /* Emit code to perform a series of operations on a multi-word quantity, one
 779    word at a time.  */
 780 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
 781
 782 /* Emit code to make a call to a constant function or a library call. */
 783 extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx));
 784
 785 /* Emit one rtl instruction to store zero in specified rtx.  */
 786 extern void emit_clr_insn PARAMS ((rtx));
 787
 788 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 789 extern void emit_0_to_1_insn PARAMS ((rtx));
 790
 791 /* Emit one rtl insn to compare two rtx's.  */
 792 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
 793                                    enum machine_mode, int, int));
 794
 795 /* Emit a pair of rtl insns to compare two rtx's and to jump
 796    to a label if the comparison is true.  */
 797 extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx,
 798                                              enum machine_mode, int, int, rtx));
 799
 800 /* The various uses that a comparison can have; used by can_compare_p:
 801    jumps, conditional moves, store flag operations.  */
 802 enum can_compare_purpose
 803 {
 804   ccp_jump,
 805   ccp_cmov,
 806   ccp_store_flag
 807 };
 808
 809 /* Nonzero if a compare of mode MODE can be done straightforwardly
 810    (without splitting it into pieces).  */
 811 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
 812                                   enum can_compare_purpose));
 813
 814 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
 815                                       enum machine_mode *, int *, int,
 816                                       enum can_compare_purpose));
 817
 818 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
 819                                     enum machine_mode, int));
 820
 821 /* Generate code to indirectly jump to a location given in the rtx LOC.  */
 822 extern void emit_indirect_jump PARAMS ((rtx));
 823
 824 #ifdef HAVE_conditional_move
 825 /* Emit a conditional move operation.  */
 826 rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx,
 827                                    enum machine_mode, rtx, rtx,
 828                                    enum machine_mode, int));
 829
 830 /* Return non-zero if the conditional move is supported.  */
 831 int can_conditionally_move_p PARAMS ((enum machine_mode mode));
 832
 833 #endif
 834
 835 /* Create but don't emit one rtl instruction to add one rtx into another.
 836    Modes must match; operands must meet the operation's predicates.
 837    Likewise for subtraction and for just copying.
 838    These do not call protect_from_queue; caller must do so.  */
 839 extern rtx gen_add2_insn PARAMS ((rtx, rtx));
 840 extern rtx gen_sub2_insn PARAMS ((rtx, rtx));
 841 extern rtx gen_move_insn PARAMS ((rtx, rtx));
 842 extern int have_add2_insn PARAMS ((enum machine_mode));
 843 extern int have_sub2_insn PARAMS ((enum machine_mode));
 844
 845 /* Return the INSN_CODE to use for an extend operation.  */
 846 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
 847                                             enum machine_mode, int));
 848
 849 /* Generate the body of an insn to extend Y (with mode MFROM)
 850    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 851 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
 852                                     enum machine_mode, int));
 853
 854 /* Initialize the tables that control conversion between fixed and
 855    floating values.  */
 856 extern void init_fixtab PARAMS ((void));
 857 extern void init_floattab PARAMS ((void));
 858
 859 /* Generate code for a FLOAT_EXPR.  */
 860 extern void expand_float PARAMS ((rtx, rtx, int));
 861
 862 /* Generate code for a FIX_EXPR.  */
 863 extern void expand_fix PARAMS ((rtx, rtx, int));
 864
 865 /* Call this to initialize an optab function entry.  */
 866 extern rtx init_one_libfunc PARAMS ((const char *));
 867
 868 /* Call this once to initialize the contents of the optabs
 869    appropriately for the current target machine.  */
 870 extern void init_optabs PARAMS ((void));
 871 \f
 872 /* Functions from expmed.c:  */
 873
 874 /* Arguments MODE, RTX: return an rtx for the negation of that value.
 875    May emit insns.  */
 876 extern rtx negate_rtx PARAMS ((enum machine_mode, rtx));
 877
 878 /* Expand a logical AND operation.  */
 879 extern rtx expand_and PARAMS ((rtx, rtx, rtx));
 880
 881 /* Emit a store-flag operation.  */
 882 extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx,
 883                                     enum machine_mode, int, int));
 884
 885 /* Like emit_store_flag, but always succeeds.  */
 886 extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx,
 887                                           enum machine_mode, int, int));
 888
 889 /* Functions from loop.c:  */
 890
 891 /* Given a JUMP_INSN, return a description of the test being made.  */
 892 extern rtx get_condition PARAMS ((rtx, rtx *));
 893
 894 /* Generate a conditional trap instruction.  */
 895 extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx));
 896 \f
 897 /* Functions from builtins.c:  */
 898 #ifdef TREE_CODE
 899 extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 900 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
 901 extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx));
 902 extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree));
 903 extern rtx expand_builtin_va_arg PARAMS ((tree, tree));
 904 #endif
 905
 906 extern rtx expand_builtin_setjmp PARAMS ((rtx, rtx, rtx, rtx));
 907 extern void expand_builtin_longjmp PARAMS ((rtx, rtx));
 908 extern rtx expand_builtin_saveregs PARAMS ((void));
 909 extern int get_varargs_alias_set PARAMS ((void));
 910 \f
 911 /* Functions from expr.c:  */
 912
 913 /* This is run once per compilation to set up which modes can be used
 914    directly in memory and to initialize the block move optab.  */
 915 extern void init_expr_once PARAMS ((void));
 916
 917 /* This is run at the start of compiling a function.  */
 918 extern void init_expr PARAMS ((void));
 919
 920 /* This function is run once to initialize stor-layout.c.  */
 921
 922 extern void init_stor_layout_once PARAMS ((void));
 923
 924 /* This is run at the end of compiling a function.  */
 925 extern void finish_expr_for_function PARAMS ((void));
 926
 927 /* Use protect_from_queue to convert a QUEUED expression
 928    into something that you can put immediately into an instruction.  */
 929 extern rtx protect_from_queue PARAMS ((rtx, int));
 930
 931 /* Perform all the pending incrementations.  */
 932 extern void emit_queue PARAMS ((void));
 933
 934 /* Tell if something has a queued subexpression.  */
 935 extern int queued_subexp_p PARAMS ((rtx));
 936
 937 /* Emit some rtl insns to move data between rtx's, converting machine modes.
 938    Both modes must be floating or both fixed.  */
 939 extern void convert_move PARAMS ((rtx, rtx, int));
 940
 941 /* Convert an rtx to specified machine mode and return the result.  */
 942 extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int));
 943
 944 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 945 extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode, rtx, int));
 946
 947 /* Emit code to move a block Y to a block X.  */
 948 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, int));
 949
 950 /* Copy all or part of a value X into registers starting at REGNO.
 951    The number of registers to be filled is NREGS.  */
 952 extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode));
 953
 954 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
 955    The number of registers to be filled is NREGS.  */
 956 extern void move_block_from_reg PARAMS ((int, rtx, int, int));
 957
 958 /* Load a BLKmode value into non-consecutive registers represented by a
 959    PARALLEL.  */
 960 extern void emit_group_load PARAMS ((rtx, rtx, int, int));
 961 /* Store a BLKmode value from non-consecutive registers represented by a
 962    PARALLEL.  */
 963 extern void emit_group_store PARAMS ((rtx, rtx, int, int));
 964
 965 #ifdef TREE_CODE
 966 /* Copy BLKmode object from a set of registers. */
 967 extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree));
 968 #endif
 969
 970 /* Mark REG as holding a parameter for the next CALL_INSN.  */
 971 extern void use_reg PARAMS ((rtx *, rtx));
 972 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
 973    for the next CALL_INSN.  */
 974 extern void use_regs PARAMS ((rtx *, int, int));
 975 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
 976 extern void use_group_regs PARAMS ((rtx *, rtx));
 977
 978 /* Write zeros through the storage of OBJECT.
 979    If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
 980    alignment.  */
 981 extern rtx clear_storage PARAMS ((rtx, rtx, int));
 982
 983 /* Emit insns to set X from Y.  */
 984 extern rtx emit_move_insn PARAMS ((rtx, rtx));
 985
 986 /* Emit insns to set X from Y, with no frills.  */
 987 extern rtx emit_move_insn_1 PARAMS ((rtx, rtx));
 988
 989 /* Push a block of length SIZE (perhaps variable)
 990    and return an rtx to address the beginning of the block.  */
 991 extern rtx push_block PARAMS ((rtx, int, int));
 992
 993 /* Make an operand to push something on the stack.  */
 994 extern rtx gen_push_operand PARAMS ((void));
 995
 996 #ifdef TREE_CODE
 997 /* Generate code to push something onto the stack, given its mode and type.  */
 998 extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx, int,
 999                                     int, rtx, int, rtx, rtx, int, rtx));
1000
1001 /* Emit library call.  */
1002 extern void emit_library_call PARAMS ((rtx orgfun, int no_queue,
1003   enum machine_mode outmode, int nargs, ...));
1004 extern rtx emit_library_call_value PARAMS ((rtx orgfun, rtx value, int no_queue,
1005   enum machine_mode outmode, int nargs, ...));
1006
1007 /* Expand an assignment that stores the value of FROM into TO. */
1008 extern rtx expand_assignment PARAMS ((tree, tree, int, int));
1009
1010 /* Generate code for computing expression EXP,
1011    and storing the value into TARGET.
1012    If SUGGEST_REG is nonzero, copy the value through a register
1013    and return that register, if that is possible.  */
1014 extern rtx store_expr PARAMS ((tree, rtx, int));
1015 #endif
1016
1017 /* Given an rtx that may include add and multiply operations,
1018    generate them as insns and return a pseudo-reg containing the value.
1019    Useful after calling expand_expr with 1 as sum_ok.  */
1020 extern rtx force_operand PARAMS ((rtx, rtx));
1021
1022 #ifdef TREE_CODE
1023 /* Generate code for computing expression EXP.
1024    An rtx for the computed value is returned.  The value is never null.
1025    In the case of a void EXP, const0_rtx is returned.  */
1026 extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode,
1027                                 enum expand_modifier));
1028 #endif
1029
1030 /* At the start of a function, record that we have no previously-pushed
1031    arguments waiting to be popped.  */
1032 extern void init_pending_stack_adjust PARAMS ((void));
1033
1034 /* When exiting from function, if safe, clear out any pending stack adjust
1035    so the adjustment won't get done.  */
1036 extern void clear_pending_stack_adjust PARAMS ((void));
1037
1038 /* Pop any previously-pushed arguments that have not been popped yet.  */
1039 extern void do_pending_stack_adjust PARAMS ((void));
1040
1041 #ifdef TREE_CODE
1042 /* Return the tree node and offset if a given argument corresponds to
1043    a string constant.  */
1044 extern tree string_constant PARAMS ((tree, tree *));
1045
1046 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
1047 extern void jumpifnot PARAMS ((tree, rtx));
1048
1049 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
1050 extern void jumpif PARAMS ((tree, rtx));
1051
1052 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1053    the result is zero, or IF_TRUE_LABEL if the result is one.  */
1054 extern void do_jump PARAMS ((tree, rtx, rtx));
1055 #endif
1056
1057 /* Generate rtl to compare two rtx's, will call emit_cmp_insn.  */
1058 extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int,
1059                                      enum machine_mode, rtx, int));
1060 extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int,
1061                                              enum machine_mode, rtx, int,
1062                                              rtx, rtx));
1063
1064 /* Generate a tablejump instruction (used for switch statements).  */
1065 extern void do_tablejump PARAMS ((rtx, enum machine_mode, rtx, rtx, rtx));
1066 \f
1067 #ifdef TREE_CODE
1068 /* rtl.h and tree.h were included.  */
1069 /* Return an rtx for the size in bytes of the value of an expr.  */
1070 extern rtx expr_size PARAMS ((tree));
1071
1072 extern rtx lookup_static_chain PARAMS ((tree));
1073
1074 /* Convert a stack slot address ADDR valid in function FNDECL
1075    into an address valid in this function (using a static chain).  */
1076 extern rtx fix_lexical_addr PARAMS ((rtx, tree));
1077
1078 /* Return the address of the trampoline for entering nested fn FUNCTION.  */
1079 extern rtx trampoline_address PARAMS ((tree));
1080
1081 /* Return an rtx that refers to the value returned by a function
1082    in its original home.  This becomes invalid if any more code is emitted.  */
1083 extern rtx hard_function_value PARAMS ((tree, tree, int));
1084
1085 extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int));
1086
1087 extern rtx expand_call PARAMS ((tree, rtx, int));
1088
1089 extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree, rtx, int));
1090 extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx, rtx, rtx, int));
1091 extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree, struct args_size *, struct args_size *, struct args_size *, struct args_size *));
1092 extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx));
1093 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary.  */
1094 extern rtx label_rtx PARAMS ((tree));
1095 #endif
1096
1097 /* Indicate how an input argument register was promoted.  */
1098 extern rtx promoted_input_arg PARAMS ((int, enum machine_mode *, int *));
1099
1100 /* Return an rtx like arg but sans any constant terms.
1101    Returns the original rtx if it has no constant terms.
1102    The constant terms are added and stored via a second arg.  */
1103 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1104
1105 /* Convert arg to a valid memory address for specified machine mode,
1106    by emitting insns to perform arithmetic if nec.  */
1107 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1108
1109 /* Like `memory_address' but pretent `flag_force_addr' is 0.  */
1110 extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx));
1111
1112 /* Return a memory reference like MEMREF, but with its mode changed
1113    to MODE and its address changed to ADDR.
1114    (VOIDmode means don't change the mode.
1115    NULL for ADDR means don't change the address.)  */
1116 extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx));
1117
1118 /* Return a memory reference like MEMREF, but which is known to have a
1119    valid address.  */
1120
1121 extern rtx validize_mem PARAMS ((rtx));
1122
1123 /* Assemble the static constant template for function entry trampolines.  */
1124 extern rtx assemble_trampoline_template PARAMS ((void));
1125
1126 /* Return 1 if two rtx's are equivalent in structure and elements.  */
1127 extern int rtx_equal_p PARAMS ((rtx, rtx));
1128
1129 /* Given rtx, return new rtx whose address won't be affected by
1130    any side effects.  It has been copied to a new temporary reg.  */
1131 extern rtx stabilize PARAMS ((rtx));
1132
1133 /* Given an rtx, copy all regs it refers to into new temps
1134    and return a modified copy that refers to the new temps.  */
1135 extern rtx copy_all_regs PARAMS ((rtx));
1136
1137 /* Copy given rtx to a new temp reg and return that.  */
1138 extern rtx copy_to_reg PARAMS ((rtx));
1139
1140 /* Like copy_to_reg but always make the reg Pmode.  */
1141 extern rtx copy_addr_to_reg PARAMS ((rtx));
1142
1143 /* Like copy_to_reg but always make the reg the specified mode MODE.  */
1144 extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx));
1145
1146 /* Copy given rtx to given temp reg and return that.  */
1147 extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode));
1148
1149 /* Copy a value to a register if it isn't already a register.
1150    Args are mode (in case value is a constant) and the value.  */
1151 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1152
1153 /* Return given rtx, copied into a new temp reg if it was in memory.  */
1154 extern rtx force_not_mem PARAMS ((rtx));
1155
1156 #ifdef TREE_CODE
1157 /* Return mode and signedness to use when object is promoted.  */
1158 extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode,
1159                                                int *, int));
1160 #endif
1161
1162 /* Remove some bytes from the stack.  An rtx says how many.  */
1163 extern void adjust_stack PARAMS ((rtx));
1164
1165 /* Add some bytes to the stack.  An rtx says how many.  */
1166 extern void anti_adjust_stack PARAMS ((rtx));
1167
1168 /* This enum is used for the following two functions.  */
1169 enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
1170
1171 /* Save the stack pointer at the specified level.  */
1172 extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx));
1173
1174 /* Restore the stack pointer from a save area of the specified level.  */
1175 extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx));
1176
1177 /* Allocate some space on the stack dynamically and return its address.  An rtx
1178    says how many bytes.  */
1179 extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int));
1180
1181 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1182    FIRST is a constant and size is a Pmode RTX.  These are offsets from the
1183    current stack pointer.  STACK_GROWS_DOWNWARD says whether to add or
1184    subtract from the stack.  If SIZE is constant, this is done
1185    with a fixed number of probes.  Otherwise, we must make a loop.  */
1186 extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx));
1187
1188 /* Return an rtx that refers to the value returned by a library call
1189    in its original home.  This becomes invalid if any more code is emitted.  */
1190 extern rtx hard_libcall_value PARAMS ((enum machine_mode));
1191
1192 /* Given an rtx, return an rtx for a value rounded up to a multiple
1193    of STACK_BOUNDARY / BITS_PER_UNIT.  */
1194 extern rtx round_push PARAMS ((rtx));
1195
1196 extern rtx store_bit_field PARAMS ((rtx, int, int, enum machine_mode, rtx, int, int));
1197 extern rtx extract_bit_field PARAMS ((rtx, int, int, int, rtx, enum machine_mode, enum machine_mode, int, int));
1198 extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int));
1199 extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int));
1200 extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int));
1201
1202 extern rtx assemble_static_space PARAMS ((int));
1203
1204 /* Hook called by expand_expr for language-specific tree codes.
1205    It is up to the language front end to install a hook
1206    if it has any such codes that expand_expr needs to know about.  */
1207 extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
1208                                         enum machine_mode,
1209                                         enum expand_modifier modifier));
1210
1211 #ifdef TREE_CODE
1212 /* Hook called by output_constant for language-specific tree codes.
1213    It is up to the language front-end to install a hook if it has any
1214    such codes that output_constant needs to know about.  Returns a
1215    language-independent constant equivalent to its input.  */
1216 extern tree (*lang_expand_constant) PARAMS ((tree));
1217 #endif
1218
1219 extern void init_all_optabs                     PARAMS ((void));
1220 extern void do_jump_by_parts_equality_rtx       PARAMS ((rtx, rtx, rtx));
1221 extern void do_jump_by_parts_greater_rtx        PARAMS ((enum machine_mode,
1222                                                          int, rtx, rtx, rtx,
1223                                                          rtx));
1224
1225 #ifdef TREE_CODE   /* Don't lose if tree.h not included.  */
1226 extern void mark_seen_cases                     PARAMS ((tree, unsigned char *,
1227                                                          long, int));
1228 #endif