gcc/expr.h

   1 /* Definitions for code generation pass of GNU compiler.
   2    Copyright (C) 1987, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* The default branch cost is 1.  */
  23 #ifndef BRANCH_COST
  24 #define BRANCH_COST 1
  25 #endif
  26
  27 /* Macros to access the slots of a QUEUED rtx.
  28    Here rather than in rtl.h because only the expansion pass
  29    should ever encounter a QUEUED.  */
  30
  31 /* The variable for which an increment is queued.  */
  32 #define QUEUED_VAR(P) XEXP (P, 0)
  33 /* If the increment has been emitted, this is the insn
  34    that does the increment.  It is zero before the increment is emitted.
  35    If more than one insn is emitted, this is the first insn.  */
  36 #define QUEUED_INSN(P) XEXP (P, 1)
  37 /* If a pre-increment copy has been generated, this is the copy
  38    (it is a temporary reg).  Zero if no copy made yet.  */
  39 #define QUEUED_COPY(P) XEXP (P, 2)
  40 /* This is the body to use for the insn to do the increment.
  41    It is used to emit the increment.  */
  42 #define QUEUED_BODY(P) XEXP (P, 3)
  43 /* Next QUEUED in the queue.  */
  44 #define QUEUED_NEXT(P) XEXP (P, 4)
  45
  46 /* This is the 4th arg to `expand_expr'.
  47    EXPAND_SUM means it is ok to return a PLUS rtx or MULT rtx.
  48    EXPAND_INITIALIZER is similar but also record any labels on forced_labels.
  49    EXPAND_CONST_ADDRESS means it is ok to return a MEM whose address
  50     is a constant that is not a legitimate address.
  51    EXPAND_MEMORY_USE_* are explained below.  */
  52 enum expand_modifier {EXPAND_NORMAL, EXPAND_SUM,
  53                       EXPAND_CONST_ADDRESS, EXPAND_INITIALIZER,
  54                       EXPAND_MEMORY_USE_WO, EXPAND_MEMORY_USE_RW,
  55                       EXPAND_MEMORY_USE_BAD, EXPAND_MEMORY_USE_DONT};
  56
  57 /* Argument for chkr_* functions.
  58    MEMORY_USE_RO: the pointer reads memory.
  59    MEMORY_USE_WO: the pointer writes to memory.
  60    MEMORY_USE_RW: the pointer modifies memory (ie it reads and writes). An
  61                   example is (*ptr)++
  62    MEMORY_USE_BAD: use this if you don't know the behavior of the pointer, or
  63                    if you know there are no pointers.  Using an INDIRECT_REF
  64                    with MEMORY_USE_BAD will abort.
  65    MEMORY_USE_TW: just test for writing, without update.  Special.
  66    MEMORY_USE_DONT: the memory is neither read nor written.  This is used by
  67                    '->' and '.'.  */
  68 enum memory_use_mode {MEMORY_USE_BAD = 0, MEMORY_USE_RO = 1,
  69                       MEMORY_USE_WO = 2, MEMORY_USE_RW = 3,
  70                       MEMORY_USE_TW = 6, MEMORY_USE_DONT = 99};
  71
  72 /* Prevent the compiler from deferring stack pops.  See
  73    inhibit_defer_pop for more information.  */
  74 #define NO_DEFER_POP (inhibit_defer_pop += 1)
  75
  76 /* Allow the compiler to defer stack pops.  See inhibit_defer_pop for
  77    more information.  */
  78 #define OK_DEFER_POP (inhibit_defer_pop -= 1)
  79 \f
  80 #ifdef TREE_CODE /* Don't lose if tree.h not included.  */
  81 /* Structure to record the size of a sequence of arguments
  82    as the sum of a tree-expression and a constant.  This structure is
  83    also used to store offsets from the stack, which might be negative,
  84    so the variable part must be ssizetype, not sizetype.  */
  85
  86 struct args_size
  87 {
  88   HOST_WIDE_INT constant;
  89   tree var;
  90 };
  91 #endif
  92
  93 /* Add the value of the tree INC to the `struct args_size' TO.  */
  94
  95 #define ADD_PARM_SIZE(TO, INC)  \
  96 { tree inc = (INC);                             \
  97   if (host_integerp (inc, 0))                   \
  98     (TO).constant += tree_low_cst (inc, 0);     \
  99   else if ((TO).var == 0)                       \
 100     (TO).var = inc;                             \
 101   else                                          \
 102     (TO).var = size_binop (PLUS_EXPR, (TO).var, inc); }
 103
 104 #define SUB_PARM_SIZE(TO, DEC)  \
 105 { tree dec = (DEC);                             \
 106   if (host_integerp (dec, 0))                   \
 107     (TO).constant -= tree_low_cst (dec, 0);     \
 108   else if ((TO).var == 0)                       \
 109     (TO).var = size_binop (MINUS_EXPR, ssize_int (0), dec); \
 110   else                                          \
 111     (TO).var = size_binop (MINUS_EXPR, (TO).var, dec); }
 112
 113 /* Convert the implicit sum in a `struct args_size' into a tree
 114    of type ssizetype.  */
 115 #define ARGS_SIZE_TREE(SIZE)                                    \
 116 ((SIZE).var == 0 ? ssize_int ((SIZE).constant)                  \
 117  : size_binop (PLUS_EXPR, (SIZE).var, ssize_int ((SIZE).constant)))
 118
 119 /* Convert the implicit sum in a `struct args_size' into an rtx.  */
 120 #define ARGS_SIZE_RTX(SIZE)                                     \
 121 ((SIZE).var == 0 ? GEN_INT ((SIZE).constant)                    \
 122  : expand_expr (ARGS_SIZE_TREE (SIZE), NULL_RTX, VOIDmode,      \
 123                 EXPAND_MEMORY_USE_BAD))
 124
 125 /* Supply a default definition for FUNCTION_ARG_PADDING:
 126    usually pad upward, but pad short args downward on
 127    big-endian machines.  */
 128
 129 enum direction {none, upward, downward};  /* Value has this type.  */
 130
 131 #ifndef FUNCTION_ARG_PADDING
 132 #define FUNCTION_ARG_PADDING(MODE, TYPE)                                \
 133   (! BYTES_BIG_ENDIAN                                                   \
 134    ? upward                                                             \
 135    : (((MODE) == BLKmode                                                \
 136        ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST         \
 137           && int_size_in_bytes (TYPE) < (PARM_BOUNDARY / BITS_PER_UNIT)) \
 138        : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                       \
 139       ? downward : upward))
 140 #endif
 141
 142 /* Supply a default definition for FUNCTION_ARG_BOUNDARY.  Normally, we let
 143    FUNCTION_ARG_PADDING, which also pads the length, handle any needed
 144    alignment.  */
 145
 146 #ifndef FUNCTION_ARG_BOUNDARY
 147 #define FUNCTION_ARG_BOUNDARY(MODE, TYPE)       PARM_BOUNDARY
 148 #endif
 149
 150 /* Provide a default value for STRICT_ARGUMENT_NAMING.  */
 151 #ifndef STRICT_ARGUMENT_NAMING
 152 #define STRICT_ARGUMENT_NAMING 0
 153 #endif
 154
 155 /* Provide a default value for PRETEND_OUTGOING_VARARGS_NAMED.  */
 156 #ifdef SETUP_INCOMING_VARARGS
 157 #ifndef PRETEND_OUTGOING_VARARGS_NAMED
 158 #define PRETEND_OUTGOING_VARARGS_NAMED 1
 159 #endif
 160 #else
 161 /* It is an error to define PRETEND_OUTGOING_VARARGS_NAMED without
 162    defining SETUP_INCOMING_VARARGS.  */
 163 #define PRETEND_OUTGOING_VARARGS_NAMED 0
 164 #endif
 165
 166 /* Nonzero if we do not know how to pass TYPE solely in registers.
 167    We cannot do so in the following cases:
 168
 169    - if the type has variable size
 170    - if the type is marked as addressable (it is required to be constructed
 171      into the stack)
 172    - if the padding and mode of the type is such that a copy into a register
 173      would put it into the wrong part of the register.
 174
 175    Which padding can't be supported depends on the byte endianness.
 176
 177    A value in a register is implicitly padded at the most significant end.
 178    On a big-endian machine, that is the lower end in memory.
 179    So a value padded in memory at the upper end can't go in a register.
 180    For a little-endian machine, the reverse is true.  */
 181
 182 #ifndef MUST_PASS_IN_STACK
 183 #define MUST_PASS_IN_STACK(MODE,TYPE)                   \
 184   ((TYPE) != 0                                          \
 185    && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST      \
 186        || TREE_ADDRESSABLE (TYPE)                       \
 187        || ((MODE) == BLKmode                            \
 188            && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \
 189                  && 0 == (int_size_in_bytes (TYPE)      \
 190                           % (PARM_BOUNDARY / BITS_PER_UNIT))) \
 191            && (FUNCTION_ARG_PADDING (MODE, TYPE)        \
 192                == (BYTES_BIG_ENDIAN ? upward : downward)))))
 193 #endif
 194
 195 /* Nonzero if type TYPE should be returned in memory.
 196    Most machines can use the following default definition.  */
 197
 198 #ifndef RETURN_IN_MEMORY
 199 #define RETURN_IN_MEMORY(TYPE) (TYPE_MODE (TYPE) == BLKmode)
 200 #endif
 201
 202 /* Supply a default definition of STACK_SAVEAREA_MODE for emit_stack_save.
 203    Normally move_insn, so Pmode stack pointer.  */
 204
 205 #ifndef STACK_SAVEAREA_MODE
 206 #define STACK_SAVEAREA_MODE(LEVEL) Pmode
 207 #endif
 208
 209 /* Supply a default definition of STACK_SIZE_MODE for
 210    allocate_dynamic_stack_space.  Normally PLUS/MINUS, so word_mode.  */
 211
 212 #ifndef STACK_SIZE_MODE
 213 #define STACK_SIZE_MODE word_mode
 214 #endif
 215
 216 /* Provide default values for the macros controlling stack checking.  */
 217
 218 #ifndef STACK_CHECK_BUILTIN
 219 #define STACK_CHECK_BUILTIN 0
 220 #endif
 221
 222 /* The default interval is one page.  */
 223 #ifndef STACK_CHECK_PROBE_INTERVAL
 224 #define STACK_CHECK_PROBE_INTERVAL 4096
 225 #endif
 226
 227 /* The default is to do a store into the stack.  */
 228 #ifndef STACK_CHECK_PROBE_LOAD
 229 #define STACK_CHECK_PROBE_LOAD 0
 230 #endif
 231
 232 /* This value is arbitrary, but should be sufficient for most machines.  */
 233 #ifndef STACK_CHECK_PROTECT
 234 #define STACK_CHECK_PROTECT (75 * UNITS_PER_WORD)
 235 #endif
 236
 237 /* Make the maximum frame size be the largest we can and still only need
 238    one probe per function.  */
 239 #ifndef STACK_CHECK_MAX_FRAME_SIZE
 240 #define STACK_CHECK_MAX_FRAME_SIZE \
 241   (STACK_CHECK_PROBE_INTERVAL - UNITS_PER_WORD)
 242 #endif
 243
 244 /* This is arbitrary, but should be large enough everywhere.  */
 245 #ifndef STACK_CHECK_FIXED_FRAME_SIZE
 246 #define STACK_CHECK_FIXED_FRAME_SIZE (4 * UNITS_PER_WORD)
 247 #endif
 248
 249 /* Provide a reasonable default for the maximum size of an object to
 250    allocate in the fixed frame.  We may need to be able to make this
 251    controllable by the user at some point.  */
 252 #ifndef STACK_CHECK_MAX_VAR_SIZE
 253 #define STACK_CHECK_MAX_VAR_SIZE (STACK_CHECK_MAX_FRAME_SIZE / 100)
 254 #endif
 255 \f
 256 /* Optabs are tables saying how to generate insn bodies
 257    for various machine modes and numbers of operands.
 258    Each optab applies to one operation.
 259    For example, add_optab applies to addition.
 260
 261    The insn_code slot is the enum insn_code that says how to
 262    generate an insn for this operation on a particular machine mode.
 263    It is CODE_FOR_nothing if there is no such insn on the target machine.
 264
 265    The `lib_call' slot is the name of the library function that
 266    can be used to perform the operation.
 267
 268    A few optabs, such as move_optab and cmp_optab, are used
 269    by special code.  */
 270
 271 /* Everything that uses expr.h needs to define enum insn_code
 272    but we don't list it in the Makefile dependencies just for that.  */
 273 #include "insn-codes.h"
 274
 275 typedef struct optab
 276 {
 277   enum rtx_code code;
 278   struct {
 279     enum insn_code insn_code;
 280     rtx libfunc;
 281   } handlers [NUM_MACHINE_MODES];
 282 } * optab;
 283
 284 /* Given an enum insn_code, access the function to construct
 285    the body of that kind of insn.  */
 286 #ifdef FUNCTION_CONVERSION_BUG
 287 /* Some compilers fail to convert a function properly to a
 288    pointer-to-function when used as an argument.
 289    So produce the pointer-to-function directly.
 290    Luckily, these compilers seem to work properly when you
 291    call the pointer-to-function.  */
 292 #define GEN_FCN(CODE) (insn_data[(int) (CODE)].genfun)
 293 #else
 294 #define GEN_FCN(CODE) (*insn_data[(int) (CODE)].genfun)
 295 #endif
 296
 297 /* Enumeration of valid indexes into optab_table.  */
 298 enum optab_index
 299 {
 300   OTI_add,
 301   OTI_addv,
 302   OTI_sub,
 303   OTI_subv,
 304
 305   /* Signed and fp multiply */
 306   OTI_smul,
 307   OTI_smulv,
 308   /* Signed multiply, return high word */
 309   OTI_smul_highpart,
 310   OTI_umul_highpart,
 311   /* Signed multiply with result one machine mode wider than args */
 312   OTI_smul_widen,
 313   OTI_umul_widen,
 314
 315   /* Signed divide */
 316   OTI_sdiv,
 317   OTI_sdivv,
 318   /* Signed divide-and-remainder in one */
 319   OTI_sdivmod,
 320   OTI_udiv,
 321   OTI_udivmod,
 322   /* Signed remainder */
 323   OTI_smod,
 324   OTI_umod,
 325   /* Optab for floating divide. */
 326   OTI_flodiv,
 327   /* Convert float to integer in float fmt */
 328   OTI_ftrunc,
 329
 330   /* Logical and */
 331   OTI_and,
 332   /* Logical or */
 333   OTI_ior,
 334   /* Logical xor */
 335   OTI_xor,
 336
 337   /* Arithmetic shift left */
 338   OTI_ashl,
 339   /* Logical shift right */
 340   OTI_lshr,
 341   /* Arithmetic shift right */
 342   OTI_ashr,
 343   /* Rotate left */
 344   OTI_rotl,
 345   /* Rotate right */
 346   OTI_rotr,
 347   /* Signed and floating-point minimum value */
 348   OTI_smin,
 349   /* Signed and floating-point maximum value */
 350   OTI_smax,
 351   /* Unsigned minimum value */
 352   OTI_umin,
 353   /* Unsigned maximum value */
 354   OTI_umax,
 355
 356   /* Move instruction.  */
 357   OTI_mov,
 358   /* Move, preserving high part of register.  */
 359   OTI_movstrict,
 360
 361   /* Unary operations */
 362   /* Negation */
 363   OTI_neg,
 364   OTI_negv,
 365   /* Abs value */
 366   OTI_abs,
 367   OTI_absv,
 368   /* Bitwise not */
 369   OTI_one_cmpl,
 370   /* Find first bit set */
 371   OTI_ffs,
 372   /* Square root */
 373   OTI_sqrt,
 374   /* Sine */
 375   OTI_sin,
 376   /* Cosine */
 377   OTI_cos,
 378
 379   /* Compare insn; two operands.  */
 380   OTI_cmp,
 381   /* Used only for libcalls for unsigned comparisons.  */
 382   OTI_ucmp,
 383   /* tst insn; compare one operand against 0 */
 384   OTI_tst,
 385
 386   /* String length */
 387   OTI_strlen,
 388
 389   /* Combined compare & jump/store flags/move operations.  */
 390   OTI_cbranch,
 391   OTI_cmov,
 392   OTI_cstore,
 393
 394   OTI_MAX
 395 };
 396
 397 extern optab optab_table[OTI_MAX];
 398
 399 #define add_optab (optab_table[OTI_add])
 400 #define sub_optab (optab_table[OTI_sub])
 401 #define smul_optab (optab_table[OTI_smul])
 402 #define addv_optab (optab_table[OTI_addv])
 403 #define subv_optab (optab_table[OTI_subv])
 404 #define smul_highpart_optab (optab_table[OTI_smul_highpart])
 405 #define umul_highpart_optab (optab_table[OTI_umul_highpart])
 406 #define smul_widen_optab (optab_table[OTI_smul_widen])
 407 #define umul_widen_optab (optab_table[OTI_umul_widen])
 408 #define sdiv_optab (optab_table[OTI_sdiv])
 409 #define smulv_optab (optab_table[OTI_smulv])
 410 #define sdivv_optab (optab_table[OTI_sdivv])
 411 #define sdivmod_optab (optab_table[OTI_sdivmod])
 412 #define udiv_optab (optab_table[OTI_udiv])
 413 #define udivmod_optab (optab_table[OTI_udivmod])
 414 #define smod_optab (optab_table[OTI_smod])
 415 #define umod_optab (optab_table[OTI_umod])
 416 #define flodiv_optab (optab_table[OTI_flodiv])
 417 #define ftrunc_optab (optab_table[OTI_ftrunc])
 418 #define and_optab (optab_table[OTI_and])
 419 #define ior_optab (optab_table[OTI_ior])
 420 #define xor_optab (optab_table[OTI_xor])
 421 #define ashl_optab (optab_table[OTI_ashl])
 422 #define lshr_optab (optab_table[OTI_lshr])
 423 #define ashr_optab (optab_table[OTI_ashr])
 424 #define rotl_optab (optab_table[OTI_rotl])
 425 #define rotr_optab (optab_table[OTI_rotr])
 426 #define smin_optab (optab_table[OTI_smin])
 427 #define smax_optab (optab_table[OTI_smax])
 428 #define umin_optab (optab_table[OTI_umin])
 429 #define umax_optab (optab_table[OTI_umax])
 430
 431 #define mov_optab (optab_table[OTI_mov])
 432 #define movstrict_optab (optab_table[OTI_movstrict])
 433
 434 #define neg_optab (optab_table[OTI_neg])
 435 #define negv_optab (optab_table[OTI_negv])
 436 #define abs_optab (optab_table[OTI_abs])
 437 #define absv_optab (optab_table[OTI_absv])
 438 #define one_cmpl_optab (optab_table[OTI_one_cmpl])
 439 #define ffs_optab (optab_table[OTI_ffs])
 440 #define sqrt_optab (optab_table[OTI_sqrt])
 441 #define sin_optab (optab_table[OTI_sin])
 442 #define cos_optab (optab_table[OTI_cos])
 443
 444 #define cmp_optab (optab_table[OTI_cmp])
 445 #define ucmp_optab (optab_table[OTI_ucmp])
 446 #define tst_optab (optab_table[OTI_tst])
 447
 448 #define strlen_optab (optab_table[OTI_strlen])
 449
 450 #define cbranch_optab (optab_table[OTI_cbranch])
 451 #define cmov_optab (optab_table[OTI_cmov])
 452 #define cstore_optab (optab_table[OTI_cstore])
 453
 454 /* Tables of patterns for extending one integer mode to another.  */
 455 extern enum insn_code extendtab[MAX_MACHINE_MODE][MAX_MACHINE_MODE][2];
 456
 457 /* Tables of patterns for converting between fixed and floating point. */
 458 extern enum insn_code fixtab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
 459 extern enum insn_code fixtrunctab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
 460 extern enum insn_code floattab[NUM_MACHINE_MODES][NUM_MACHINE_MODES][2];
 461
 462 /* Contains the optab used for each rtx code.  */
 463 extern optab code_to_optab[NUM_RTX_CODE + 1];
 464
 465 /* Passed to expand_binop and expand_unop to say which options to try to use
 466    if the requested operation can't be open-coded on the requisite mode.
 467    Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using a library call.
 468    Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try using a wider mode.
 469    OPTAB_MUST_WIDEN says try widening and don't try anything else.  */
 470
 471 enum optab_methods
 472 {
 473   OPTAB_DIRECT,
 474   OPTAB_LIB,
 475   OPTAB_WIDEN,
 476   OPTAB_LIB_WIDEN,
 477   OPTAB_MUST_WIDEN
 478 };
 479
 480 /* Enumeration of indexes into libfunc_table.  */
 481 enum libfunc_index
 482 {
 483   LTI_extendsfdf2,
 484   LTI_extendsfxf2,
 485   LTI_extendsftf2,
 486   LTI_extenddfxf2,
 487   LTI_extenddftf2,
 488
 489   LTI_truncdfsf2,
 490   LTI_truncxfsf2,
 491   LTI_trunctfsf2,
 492   LTI_truncxfdf2,
 493   LTI_trunctfdf2,
 494
 495   LTI_memcpy,
 496   LTI_bcopy,
 497   LTI_memcmp,
 498   LTI_bcmp,
 499   LTI_memset,
 500   LTI_bzero,
 501
 502   LTI_throw,
 503   LTI_rethrow,
 504   LTI_sjthrow,
 505   LTI_sjpopnthrow,
 506   LTI_terminate,
 507   LTI_setjmp,
 508   LTI_longjmp,
 509   LTI_eh_rtime_match,
 510
 511   LTI_eqhf2,
 512   LTI_nehf2,
 513   LTI_gthf2,
 514   LTI_gehf2,
 515   LTI_lthf2,
 516   LTI_lehf2,
 517   LTI_unordhf2,
 518
 519   LTI_eqsf2,
 520   LTI_nesf2,
 521   LTI_gtsf2,
 522   LTI_gesf2,
 523   LTI_ltsf2,
 524   LTI_lesf2,
 525   LTI_unordsf2,
 526
 527   LTI_eqdf2,
 528   LTI_nedf2,
 529   LTI_gtdf2,
 530   LTI_gedf2,
 531   LTI_ltdf2,
 532   LTI_ledf2,
 533   LTI_unorddf2,
 534
 535   LTI_eqxf2,
 536   LTI_nexf2,
 537   LTI_gtxf2,
 538   LTI_gexf2,
 539   LTI_ltxf2,
 540   LTI_lexf2,
 541   LTI_unordxf2,
 542
 543   LTI_eqtf2,
 544   LTI_netf2,
 545   LTI_gttf2,
 546   LTI_getf2,
 547   LTI_lttf2,
 548   LTI_letf2,
 549   LTI_unordtf2,
 550
 551   LTI_floatsisf,
 552   LTI_floatdisf,
 553   LTI_floattisf,
 554
 555   LTI_floatsidf,
 556   LTI_floatdidf,
 557   LTI_floattidf,
 558
 559   LTI_floatsixf,
 560   LTI_floatdixf,
 561   LTI_floattixf,
 562
 563   LTI_floatsitf,
 564   LTI_floatditf,
 565   LTI_floattitf,
 566
 567   LTI_fixsfsi,
 568   LTI_fixsfdi,
 569   LTI_fixsfti,
 570
 571   LTI_fixdfsi,
 572   LTI_fixdfdi,
 573   LTI_fixdfti,
 574
 575   LTI_fixxfsi,
 576   LTI_fixxfdi,
 577   LTI_fixxfti,
 578
 579   LTI_fixtfsi,
 580   LTI_fixtfdi,
 581   LTI_fixtfti,
 582
 583   LTI_fixunssfsi,
 584   LTI_fixunssfdi,
 585   LTI_fixunssfti,
 586
 587   LTI_fixunsdfsi,
 588   LTI_fixunsdfdi,
 589   LTI_fixunsdfti,
 590
 591   LTI_fixunsxfsi,
 592   LTI_fixunsxfdi,
 593   LTI_fixunsxfti,
 594
 595   LTI_fixunstfsi,
 596   LTI_fixunstfdi,
 597   LTI_fixunstfti,
 598
 599   LTI_chkr_check_addr,
 600   LTI_chkr_set_right,
 601   LTI_chkr_copy_bitmap,
 602   LTI_chkr_check_exec,
 603   LTI_chkr_check_str,
 604
 605   LTI_profile_function_entry,
 606   LTI_profile_function_exit,
 607
 608   LTI_MAX
 609 };
 610
 611 /* SYMBOL_REF rtx's for the library functions that are called
 612    implicitly and not via optabs.  */
 613 extern rtx libfunc_table[LTI_MAX];
 614
 615 /* Accessor macros for libfunc_table.  */
 616 #define extendsfdf2_libfunc     (libfunc_table[LTI_extendsfdf2])
 617 #define extendsfxf2_libfunc     (libfunc_table[LTI_extendsfxf2])
 618 #define extendsftf2_libfunc     (libfunc_table[LTI_extendsftf2])
 619 #define extenddfxf2_libfunc     (libfunc_table[LTI_extenddfxf2])
 620 #define extenddftf2_libfunc     (libfunc_table[LTI_extenddftf2])
 621
 622 #define truncdfsf2_libfunc      (libfunc_table[LTI_truncdfsf2])
 623 #define truncxfsf2_libfunc      (libfunc_table[LTI_truncxfsf2])
 624 #define trunctfsf2_libfunc      (libfunc_table[LTI_trunctfsf2])
 625 #define truncxfdf2_libfunc      (libfunc_table[LTI_truncxfdf2])
 626 #define trunctfdf2_libfunc      (libfunc_table[LTI_trunctfdf2])
 627
 628 #define memcpy_libfunc  (libfunc_table[LTI_memcpy])
 629 #define bcopy_libfunc   (libfunc_table[LTI_bcopy])
 630 #define memcmp_libfunc  (libfunc_table[LTI_memcmp])
 631 #define bcmp_libfunc    (libfunc_table[LTI_bcmp])
 632 #define memset_libfunc  (libfunc_table[LTI_memset])
 633 #define bzero_libfunc   (libfunc_table[LTI_bzero])
 634
 635 #define throw_libfunc   (libfunc_table[LTI_throw])
 636 #define rethrow_libfunc (libfunc_table[LTI_rethrow])
 637 #define sjthrow_libfunc (libfunc_table[LTI_sjthrow])
 638 #define sjpopnthrow_libfunc     (libfunc_table[LTI_sjpopnthrow])
 639 #define terminate_libfunc       (libfunc_table[LTI_terminate])
 640 #define setjmp_libfunc  (libfunc_table[LTI_setjmp])
 641 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
 642 #define eh_rtime_match_libfunc  (libfunc_table[LTI_eh_rtime_match])
 643
 644 #define eqhf2_libfunc   (libfunc_table[LTI_eqhf2])
 645 #define nehf2_libfunc   (libfunc_table[LTI_nehf2])
 646 #define gthf2_libfunc   (libfunc_table[LTI_gthf2])
 647 #define gehf2_libfunc   (libfunc_table[LTI_gehf2])
 648 #define lthf2_libfunc   (libfunc_table[LTI_lthf2])
 649 #define lehf2_libfunc   (libfunc_table[LTI_lehf2])
 650 #define unordhf2_libfunc        (libfunc_table[LTI_unordhf2])
 651
 652 #define eqsf2_libfunc   (libfunc_table[LTI_eqsf2])
 653 #define nesf2_libfunc   (libfunc_table[LTI_nesf2])
 654 #define gtsf2_libfunc   (libfunc_table[LTI_gtsf2])
 655 #define gesf2_libfunc   (libfunc_table[LTI_gesf2])
 656 #define ltsf2_libfunc   (libfunc_table[LTI_ltsf2])
 657 #define lesf2_libfunc   (libfunc_table[LTI_lesf2])
 658 #define unordsf2_libfunc        (libfunc_table[LTI_unordsf2])
 659
 660 #define eqdf2_libfunc   (libfunc_table[LTI_eqdf2])
 661 #define nedf2_libfunc   (libfunc_table[LTI_nedf2])
 662 #define gtdf2_libfunc   (libfunc_table[LTI_gtdf2])
 663 #define gedf2_libfunc   (libfunc_table[LTI_gedf2])
 664 #define ltdf2_libfunc   (libfunc_table[LTI_ltdf2])
 665 #define ledf2_libfunc   (libfunc_table[LTI_ledf2])
 666 #define unorddf2_libfunc        (libfunc_table[LTI_unorddf2])
 667
 668 #define eqxf2_libfunc   (libfunc_table[LTI_eqxf2])
 669 #define nexf2_libfunc   (libfunc_table[LTI_nexf2])
 670 #define gtxf2_libfunc   (libfunc_table[LTI_gtxf2])
 671 #define gexf2_libfunc   (libfunc_table[LTI_gexf2])
 672 #define ltxf2_libfunc   (libfunc_table[LTI_ltxf2])
 673 #define lexf2_libfunc   (libfunc_table[LTI_lexf2])
 674 #define unordxf2_libfunc        (libfunc_table[LTI_unordxf2])
 675
 676 #define eqtf2_libfunc   (libfunc_table[LTI_eqtf2])
 677 #define netf2_libfunc   (libfunc_table[LTI_netf2])
 678 #define gttf2_libfunc   (libfunc_table[LTI_gttf2])
 679 #define getf2_libfunc   (libfunc_table[LTI_getf2])
 680 #define lttf2_libfunc   (libfunc_table[LTI_lttf2])
 681 #define letf2_libfunc   (libfunc_table[LTI_letf2])
 682 #define unordtf2_libfunc        (libfunc_table[LTI_unordtf2])
 683
 684 #define floatsisf_libfunc       (libfunc_table[LTI_floatsisf])
 685 #define floatdisf_libfunc       (libfunc_table[LTI_floatdisf])
 686 #define floattisf_libfunc       (libfunc_table[LTI_floattisf])
 687
 688 #define floatsidf_libfunc       (libfunc_table[LTI_floatsidf])
 689 #define floatdidf_libfunc       (libfunc_table[LTI_floatdidf])
 690 #define floattidf_libfunc       (libfunc_table[LTI_floattidf])
 691
 692 #define floatsixf_libfunc       (libfunc_table[LTI_floatsixf])
 693 #define floatdixf_libfunc       (libfunc_table[LTI_floatdixf])
 694 #define floattixf_libfunc       (libfunc_table[LTI_floattixf])
 695
 696 #define floatsitf_libfunc       (libfunc_table[LTI_floatsitf])
 697 #define floatditf_libfunc       (libfunc_table[LTI_floatditf])
 698 #define floattitf_libfunc       (libfunc_table[LTI_floattitf])
 699
 700 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
 701 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
 702 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
 703
 704 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
 705 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
 706 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
 707
 708 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
 709 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
 710 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
 711
 712 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
 713 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
 714 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
 715
 716 #define fixunssfsi_libfunc      (libfunc_table[LTI_fixunssfsi])
 717 #define fixunssfdi_libfunc      (libfunc_table[LTI_fixunssfdi])
 718 #define fixunssfti_libfunc      (libfunc_table[LTI_fixunssfti])
 719
 720 #define fixunsdfsi_libfunc      (libfunc_table[LTI_fixunsdfsi])
 721 #define fixunsdfdi_libfunc      (libfunc_table[LTI_fixunsdfdi])
 722 #define fixunsdfti_libfunc      (libfunc_table[LTI_fixunsdfti])
 723
 724 #define fixunsxfsi_libfunc      (libfunc_table[LTI_fixunsxfsi])
 725 #define fixunsxfdi_libfunc      (libfunc_table[LTI_fixunsxfdi])
 726 #define fixunsxfti_libfunc      (libfunc_table[LTI_fixunsxfti])
 727
 728 #define fixunstfsi_libfunc      (libfunc_table[LTI_fixunstfsi])
 729 #define fixunstfdi_libfunc      (libfunc_table[LTI_fixunstfdi])
 730 #define fixunstfti_libfunc      (libfunc_table[LTI_fixunstfti])
 731
 732 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
 733 #define chkr_set_right_libfunc  (libfunc_table[LTI_chkr_set_right])
 734 #define chkr_copy_bitmap_libfunc        (libfunc_table[LTI_chkr_copy_bitmap])
 735 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
 736 #define chkr_check_str_libfunc  (libfunc_table[LTI_chkr_check_str])
 737
 738 #define profile_function_entry_libfunc  (libfunc_table[LTI_profile_function_entry])
 739 #define profile_function_exit_libfunc   (libfunc_table[LTI_profile_function_exit])
 740 \f
 741 typedef rtx (*rtxfun) PARAMS ((rtx));
 742
 743 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 744    gives the gen_function to make a branch to test that condition.  */
 745
 746 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 747
 748 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 749    gives the insn code to make a store-condition insn
 750    to test that condition.  */
 751
 752 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 753
 754 #ifdef HAVE_conditional_move
 755 /* Indexed by the machine mode, gives the insn code to make a conditional
 756    move insn.  */
 757
 758 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 759 #endif
 760
 761 /* This array records the insn_code of insns to perform block moves.  */
 762 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 763
 764 /* This array records the insn_code of insns to perform block clears.  */
 765 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 766
 767 /* Define functions given in optabs.c.  */
 768
 769 /* Expand a binary operation given optab and rtx operands.  */
 770 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
 771                                  int, enum optab_methods));
 772
 773 /* Expand a binary operation with both signed and unsigned forms.  */
 774 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
 775                                       rtx, rtx, int, enum optab_methods));
 776
 777 /* Generate code to perform an operation on two operands with two results.  */
 778 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
 779
 780 /* Expand a unary arithmetic operation given optab rtx operand.  */
 781 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
 782
 783 /* Expand the absolute value operation.  */
 784 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
 785
 786 /* Expand the complex absolute value operation.  */
 787 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 788
 789 /* Generate an instruction with a given INSN_CODE with an output and
 790    an input.  */
 791 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
 792
 793 /* Emit code to perform a series of operations on a multi-word quantity, one
 794    word at a time.  */
 795 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
 796
 797 /* Emit code to make a call to a constant function or a library call. */
 798 extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx));
 799
 800 /* Emit one rtl instruction to store zero in specified rtx.  */
 801 extern void emit_clr_insn PARAMS ((rtx));
 802
 803 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 804 extern void emit_0_to_1_insn PARAMS ((rtx));
 805
 806 /* Emit one rtl insn to compare two rtx's.  */
 807 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
 808                                    enum machine_mode, int, unsigned int));
 809
 810 /* Emit a pair of rtl insns to compare two rtx's and to jump
 811    to a label if the comparison is true.  */
 812 extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx,
 813                                              enum machine_mode, int,
 814                                              unsigned int, rtx));
 815
 816 /* The various uses that a comparison can have; used by can_compare_p:
 817    jumps, conditional moves, store flag operations.  */
 818 enum can_compare_purpose
 819 {
 820   ccp_jump,
 821   ccp_cmov,
 822   ccp_store_flag
 823 };
 824
 825 /* Nonzero if a compare of mode MODE can be done straightforwardly
 826    (without splitting it into pieces).  */
 827 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
 828                                   enum can_compare_purpose));
 829
 830 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
 831                                       enum machine_mode *, int *, int,
 832                                       enum can_compare_purpose));
 833
 834 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
 835                                     enum machine_mode, int));
 836
 837 /* Generate code to indirectly jump to a location given in the rtx LOC.  */
 838 extern void emit_indirect_jump PARAMS ((rtx));
 839
 840 #ifdef HAVE_conditional_move
 841 /* Emit a conditional move operation.  */
 842 rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx,
 843                                    enum machine_mode, rtx, rtx,
 844                                    enum machine_mode, int));
 845
 846 /* Return non-zero if the conditional move is supported.  */
 847 int can_conditionally_move_p PARAMS ((enum machine_mode mode));
 848
 849 #endif
 850
 851 /* Create but don't emit one rtl instruction to add one rtx into another.
 852    Modes must match; operands must meet the operation's predicates.
 853    Likewise for subtraction and for just copying.
 854    These do not call protect_from_queue; caller must do so.  */
 855 extern rtx gen_add2_insn PARAMS ((rtx, rtx));
 856 extern rtx gen_sub2_insn PARAMS ((rtx, rtx));
 857 extern rtx gen_move_insn PARAMS ((rtx, rtx));
 858 extern int have_add2_insn PARAMS ((enum machine_mode));
 859 extern int have_sub2_insn PARAMS ((enum machine_mode));
 860
 861 /* Return the INSN_CODE to use for an extend operation.  */
 862 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
 863                                             enum machine_mode, int));
 864
 865 /* Generate the body of an insn to extend Y (with mode MFROM)
 866    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 867 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
 868                                     enum machine_mode, int));
 869
 870 /* Initialize the tables that control conversion between fixed and
 871    floating values.  */
 872 extern void init_fixtab PARAMS ((void));
 873 extern void init_floattab PARAMS ((void));
 874
 875 /* Generate code for a FLOAT_EXPR.  */
 876 extern void expand_float PARAMS ((rtx, rtx, int));
 877
 878 /* Generate code for a FIX_EXPR.  */
 879 extern void expand_fix PARAMS ((rtx, rtx, int));
 880
 881 /* Call this to initialize an optab function entry.  */
 882 extern rtx init_one_libfunc PARAMS ((const char *));
 883
 884 /* Call this once to initialize the contents of the optabs
 885    appropriately for the current target machine.  */
 886 extern void init_optabs PARAMS ((void));
 887 \f
 888 /* Functions from expmed.c:  */
 889
 890 /* Arguments MODE, RTX: return an rtx for the negation of that value.
 891    May emit insns.  */
 892 extern rtx negate_rtx PARAMS ((enum machine_mode, rtx));
 893
 894 /* Expand a logical AND operation.  */
 895 extern rtx expand_and PARAMS ((rtx, rtx, rtx));
 896
 897 /* Emit a store-flag operation.  */
 898 extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx,
 899                                     enum machine_mode, int, int));
 900
 901 /* Like emit_store_flag, but always succeeds.  */
 902 extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx,
 903                                           enum machine_mode, int, int));
 904
 905 /* Functions from loop.c:  */
 906
 907 /* Given an insn and condition, return a canonical description of
 908    the test being made.  */
 909 extern rtx canonicalize_condition PARAMS ((rtx, rtx, int, rtx *, rtx));
 910
 911 /* Given a JUMP_INSN, return a canonical description of the test
 912    being made.  */
 913 extern rtx get_condition PARAMS ((rtx, rtx *));
 914
 915 /* Generate a conditional trap instruction.  */
 916 extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx));
 917 \f
 918 /* Functions from builtins.c:  */
 919 #ifdef TREE_CODE
 920 extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 921 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
 922 extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx));
 923 extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree));
 924 extern rtx expand_builtin_va_arg PARAMS ((tree, tree));
 925 #endif
 926
 927 extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx));
 928 extern void expand_builtin_setjmp_receiver PARAMS ((rtx));
 929 extern void expand_builtin_longjmp PARAMS ((rtx, rtx));
 930 extern rtx expand_builtin_saveregs PARAMS ((void));
 931 extern HOST_WIDE_INT get_varargs_alias_set PARAMS ((void));
 932 extern HOST_WIDE_INT get_frame_alias_set PARAMS ((void));
 933 extern void record_base_value           PARAMS ((unsigned int, rtx, int));
 934 extern void record_alias_subset         PARAMS ((HOST_WIDE_INT,
 935                                                  HOST_WIDE_INT));
 936 extern HOST_WIDE_INT new_alias_set              PARAMS ((void));
 937 \f
 938 /* Functions from expr.c:  */
 939
 940 /* This is run once per compilation to set up which modes can be used
 941    directly in memory and to initialize the block move optab.  */
 942 extern void init_expr_once PARAMS ((void));
 943
 944 /* This is run at the start of compiling a function.  */
 945 extern void init_expr PARAMS ((void));
 946
 947 /* This function is run once to initialize stor-layout.c.  */
 948
 949 extern void init_stor_layout_once PARAMS ((void));
 950
 951 /* This is run at the end of compiling a function.  */
 952 extern void finish_expr_for_function PARAMS ((void));
 953
 954 /* Use protect_from_queue to convert a QUEUED expression
 955    into something that you can put immediately into an instruction.  */
 956 extern rtx protect_from_queue PARAMS ((rtx, int));
 957
 958 /* Perform all the pending incrementations.  */
 959 extern void emit_queue PARAMS ((void));
 960
 961 /* Tell if something has a queued subexpression.  */
 962 extern int queued_subexp_p PARAMS ((rtx));
 963
 964 /* Emit some rtl insns to move data between rtx's, converting machine modes.
 965    Both modes must be floating or both fixed.  */
 966 extern void convert_move PARAMS ((rtx, rtx, int));
 967
 968 /* Convert an rtx to specified machine mode and return the result.  */
 969 extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int));
 970
 971 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 972 extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode,
 973                                   rtx, int));
 974
 975 /* Emit code to move a block Y to a block X.  */
 976 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, unsigned int));
 977
 978 /* Copy all or part of a value X into registers starting at REGNO.
 979    The number of registers to be filled is NREGS.  */
 980 extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode));
 981
 982 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
 983    The number of registers to be filled is NREGS.  */
 984 extern void move_block_from_reg PARAMS ((int, rtx, int, int));
 985
 986 /* Load a BLKmode value into non-consecutive registers represented by a
 987    PARALLEL.  */
 988 extern void emit_group_load PARAMS ((rtx, rtx, int, unsigned int));
 989
 990 /* Store a BLKmode value from non-consecutive registers represented by a
 991    PARALLEL.  */
 992 extern void emit_group_store PARAMS ((rtx, rtx, int, unsigned int));
 993
 994 #ifdef TREE_CODE
 995 /* Copy BLKmode object from a set of registers. */
 996 extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree));
 997 #endif
 998
 999 /* Mark REG as holding a parameter for the next CALL_INSN.  */
1000 extern void use_reg PARAMS ((rtx *, rtx));
1001
1002 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
1003    for the next CALL_INSN.  */
1004 extern void use_regs PARAMS ((rtx *, int, int));
1005
1006 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
1007 extern void use_group_regs PARAMS ((rtx *, rtx));
1008
1009 /* Write zeros through the storage of OBJECT.
1010    If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
1011    alignment.  */
1012 extern rtx clear_storage PARAMS ((rtx, rtx, unsigned int));
1013
1014 /* Return non-zero if it is desirable to store LEN bytes generated by
1015    CONSTFUN with several move instructions by store_by_pieces
1016    function.  CONSTFUNDATA is a pointer which will be passed as argument
1017    in every CONSTFUN call.
1018    ALIGN is maximum alignment we can assume.  */
1019 extern int can_store_by_pieces PARAMS ((unsigned HOST_WIDE_INT,
1020                                         rtx (*) (PTR, HOST_WIDE_INT,
1021                                                  enum machine_mode),
1022                                         PTR, unsigned int));
1023
1024 /* Generate several move instructions to store LEN bytes generated by
1025    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
1026    pointer which will be passed as argument in every CONSTFUN call.
1027    ALIGN is maximum alignment we can assume.  */
1028 extern void store_by_pieces PARAMS ((rtx, unsigned HOST_WIDE_INT,
1029                                      rtx (*) (PTR, HOST_WIDE_INT,
1030                                               enum machine_mode),
1031                                      PTR, unsigned int));
1032
1033 /* Emit insns to set X from Y.  */
1034 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1035
1036 /* Emit insns to set X from Y, with no frills.  */
1037 extern rtx emit_move_insn_1 PARAMS ((rtx, rtx));
1038
1039 /* Push a block of length SIZE (perhaps variable)
1040    and return an rtx to address the beginning of the block.  */
1041 extern rtx push_block PARAMS ((rtx, int, int));
1042
1043 /* Make an operand to push something on the stack.  */
1044 extern rtx gen_push_operand PARAMS ((void));
1045
1046 #ifdef TREE_CODE
1047 /* Generate code to push something onto the stack, given its mode and type.  */
1048 extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx,
1049                                     unsigned int, int, rtx, int, rtx, rtx,
1050                                     int, rtx));
1051
1052 /* Expand an assignment that stores the value of FROM into TO. */
1053 extern rtx expand_assignment PARAMS ((tree, tree, int, int));
1054
1055 /* Generate code for computing expression EXP,
1056    and storing the value into TARGET.
1057    If SUGGEST_REG is nonzero, copy the value through a register
1058    and return that register, if that is possible.  */
1059 extern rtx store_expr PARAMS ((tree, rtx, int));
1060 #endif
1061
1062 /* Given an rtx that may include add and multiply operations,
1063    generate them as insns and return a pseudo-reg containing the value.
1064    Useful after calling expand_expr with 1 as sum_ok.  */
1065 extern rtx force_operand PARAMS ((rtx, rtx));
1066
1067 #ifdef TREE_CODE
1068 /* Generate code for computing expression EXP.
1069    An rtx for the computed value is returned.  The value is never null.
1070    In the case of a void EXP, const0_rtx is returned.  */
1071 extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode,
1072                                 enum expand_modifier));
1073 #endif
1074
1075 /* At the start of a function, record that we have no previously-pushed
1076    arguments waiting to be popped.  */
1077 extern void init_pending_stack_adjust PARAMS ((void));
1078
1079 /* When exiting from function, if safe, clear out any pending stack adjust
1080    so the adjustment won't get done.  */
1081 extern void clear_pending_stack_adjust PARAMS ((void));
1082
1083 /* Pop any previously-pushed arguments that have not been popped yet.  */
1084 extern void do_pending_stack_adjust PARAMS ((void));
1085
1086 #ifdef TREE_CODE
1087 /* Return the tree node and offset if a given argument corresponds to
1088    a string constant.  */
1089 extern tree string_constant PARAMS ((tree, tree *));
1090
1091 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
1092 extern void jumpifnot PARAMS ((tree, rtx));
1093
1094 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
1095 extern void jumpif PARAMS ((tree, rtx));
1096
1097 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1098    the result is zero, or IF_TRUE_LABEL if the result is one.  */
1099 extern void do_jump PARAMS ((tree, rtx, rtx));
1100 #endif
1101
1102 /* Generate rtl to compare two rtx's, will call emit_cmp_insn.  */
1103 extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int,
1104                                      enum machine_mode, rtx, unsigned int));
1105 extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int,
1106                                              enum machine_mode, rtx,
1107                                              unsigned int, rtx, rtx));
1108
1109 /* Generate a tablejump instruction (used for switch statements).  */
1110 extern void do_tablejump PARAMS ((rtx, enum machine_mode, rtx, rtx, rtx));
1111 \f
1112 #ifdef TREE_CODE
1113 /* rtl.h and tree.h were included.  */
1114 /* Return an rtx for the size in bytes of the value of an expr.  */
1115 extern rtx expr_size PARAMS ((tree));
1116
1117 extern rtx lookup_static_chain PARAMS ((tree));
1118
1119 /* Convert a stack slot address ADDR valid in function FNDECL
1120    into an address valid in this function (using a static chain).  */
1121 extern rtx fix_lexical_addr PARAMS ((rtx, tree));
1122
1123 /* Return the address of the trampoline for entering nested fn FUNCTION.  */
1124 extern rtx trampoline_address PARAMS ((tree));
1125
1126 /* Return an rtx that refers to the value returned by a function
1127    in its original home.  This becomes invalid if any more code is emitted.  */
1128 extern rtx hard_function_value PARAMS ((tree, tree, int));
1129
1130 extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int));
1131
1132 extern rtx expand_call PARAMS ((tree, rtx, int));
1133
1134 extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree,
1135                                  rtx, int));
1136 extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx,
1137                                   rtx, rtx, int));
1138 extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree,
1139                                          struct args_size *,
1140                                          struct args_size *,
1141                                          struct args_size *,
1142                                          struct args_size *));
1143 extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx));
1144
1145 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary.  */
1146 extern rtx label_rtx PARAMS ((tree));
1147 #endif
1148
1149 /* Indicate how an input argument register was promoted.  */
1150 extern rtx promoted_input_arg PARAMS ((unsigned int, enum machine_mode *,
1151                                        int *));
1152
1153 /* Return an rtx like arg but sans any constant terms.
1154    Returns the original rtx if it has no constant terms.
1155    The constant terms are added and stored via a second arg.  */
1156 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1157
1158 /* Convert arg to a valid memory address for specified machine mode,
1159    by emitting insns to perform arithmetic if nec.  */
1160 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1161
1162 /* Like `memory_address' but pretent `flag_force_addr' is 0.  */
1163 extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx));
1164
1165 /* Return a memory reference like MEMREF, but with its mode changed
1166    to MODE and its address changed to ADDR.
1167    (VOIDmode means don't change the mode.
1168    NULL for ADDR means don't change the address.)  */
1169 extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx));
1170
1171 /* Return a memory reference like MEMREF, but which is known to have a
1172    valid address.  */
1173 extern rtx validize_mem PARAMS ((rtx));
1174
1175 #ifdef TREE_CODE
1176 /* Given REF, either a MEM or a REG, and T, either the type of X or
1177    the expression corresponding to REF, set RTX_UNCHANGING_P if
1178    appropriate.  */
1179 extern void maybe_set_unchanging PARAMS ((rtx, tree));
1180
1181 /* Given REF, a MEM, and T, either the type of X or the expression
1182    corresponding to REF, set the memory attributes.  OBJECTP is nonzero
1183    if we are making a new object of this type.  */
1184 extern void set_mem_attributes PARAMS ((rtx, tree, int));
1185 #endif
1186
1187 /* Assemble the static constant template for function entry trampolines.  */
1188 extern rtx assemble_trampoline_template PARAMS ((void));
1189
1190 /* Return 1 if two rtx's are equivalent in structure and elements.  */
1191 extern int rtx_equal_p PARAMS ((rtx, rtx));
1192
1193 /* Given rtx, return new rtx whose address won't be affected by
1194    any side effects.  It has been copied to a new temporary reg.  */
1195 extern rtx stabilize PARAMS ((rtx));
1196
1197 /* Given an rtx, copy all regs it refers to into new temps
1198    and return a modified copy that refers to the new temps.  */
1199 extern rtx copy_all_regs PARAMS ((rtx));
1200
1201 /* Copy given rtx to a new temp reg and return that.  */
1202 extern rtx copy_to_reg PARAMS ((rtx));
1203
1204 /* Like copy_to_reg but always make the reg Pmode.  */
1205 extern rtx copy_addr_to_reg PARAMS ((rtx));
1206
1207 /* Like copy_to_reg but always make the reg the specified mode MODE.  */
1208 extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx));
1209
1210 /* Copy given rtx to given temp reg and return that.  */
1211 extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode));
1212
1213 /* Copy a value to a register if it isn't already a register.
1214    Args are mode (in case value is a constant) and the value.  */
1215 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1216
1217 /* Return given rtx, copied into a new temp reg if it was in memory.  */
1218 extern rtx force_not_mem PARAMS ((rtx));
1219
1220 #ifdef TREE_CODE
1221 /* Return mode and signedness to use when object is promoted.  */
1222 extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode,
1223                                                int *, int));
1224 #endif
1225
1226 /* Remove some bytes from the stack.  An rtx says how many.  */
1227 extern void adjust_stack PARAMS ((rtx));
1228
1229 /* Add some bytes to the stack.  An rtx says how many.  */
1230 extern void anti_adjust_stack PARAMS ((rtx));
1231
1232 /* This enum is used for the following two functions.  */
1233 enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
1234
1235 /* Save the stack pointer at the specified level.  */
1236 extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx));
1237
1238 /* Restore the stack pointer from a save area of the specified level.  */
1239 extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx));
1240
1241 /* Allocate some space on the stack dynamically and return its address.  An rtx
1242    says how many bytes.  */
1243 extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int));
1244
1245 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1246    FIRST is a constant and size is a Pmode RTX.  These are offsets from the
1247    current stack pointer.  STACK_GROWS_DOWNWARD says whether to add or
1248    subtract from the stack.  If SIZE is constant, this is done
1249    with a fixed number of probes.  Otherwise, we must make a loop.  */
1250 extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx));
1251
1252 /* Return an rtx that refers to the value returned by a library call
1253    in its original home.  This becomes invalid if any more code is emitted.  */
1254 extern rtx hard_libcall_value PARAMS ((enum machine_mode));
1255
1256 /* Given an rtx, return an rtx for a value rounded up to a multiple
1257    of STACK_BOUNDARY / BITS_PER_UNIT.  */
1258 extern rtx round_push PARAMS ((rtx));
1259
1260 extern rtx store_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1261                                     unsigned HOST_WIDE_INT,
1262                                     enum machine_mode, rtx,
1263                                     unsigned int, HOST_WIDE_INT));
1264 extern rtx extract_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1265                                       unsigned HOST_WIDE_INT, int, rtx,
1266                                       enum machine_mode, enum machine_mode,
1267                                       unsigned int, HOST_WIDE_INT));
1268 extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int));
1269 extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int));
1270 extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int));
1271
1272 extern rtx assemble_static_space PARAMS ((int));
1273
1274 /* Hook called by expand_expr for language-specific tree codes.
1275    It is up to the language front end to install a hook
1276    if it has any such codes that expand_expr needs to know about.  */
1277 extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
1278                                         enum machine_mode,
1279                                         enum expand_modifier modifier));
1280
1281 #ifdef TREE_CODE
1282 /* Hook called by output_constant for language-specific tree codes.
1283    It is up to the language front-end to install a hook if it has any
1284    such codes that output_constant needs to know about.  Returns a
1285    language-independent constant equivalent to its input.  */
1286 extern tree (*lang_expand_constant) PARAMS ((tree));
1287
1288 extern int safe_from_p PARAMS ((rtx, tree, int));
1289
1290 /* Hook called by safe_from_p for language-specific tree codes.  It is
1291    up to the language front-end to install a hook if it has any such
1292    codes that safe_from_p needs to know about.  Since same_from_p will
1293    recursively explore the TREE_OPERANDs of an expression, this hook
1294    should not reexamine those pieces.  This routine may recursively
1295    call safe_from_p; it should always pass `0' as the TOP_P
1296    parameter.  */
1297 extern int (*lang_safe_from_p) PARAMS ((rtx, tree));
1298 #endif
1299
1300 extern void init_all_optabs                     PARAMS ((void));
1301 extern void do_jump_by_parts_equality_rtx       PARAMS ((rtx, rtx, rtx));
1302 extern void do_jump_by_parts_greater_rtx        PARAMS ((enum machine_mode,
1303                                                          int, rtx, rtx, rtx,
1304                                                          rtx));
1305
1306 #ifdef TREE_CODE   /* Don't lose if tree.h not included.  */
1307 extern void mark_seen_cases                     PARAMS ((tree, unsigned char *,
1308                                                          HOST_WIDE_INT, int));
1309 #endif