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_memmove,
 497   LTI_bcopy,
 498   LTI_memcmp,
 499   LTI_bcmp,
 500   LTI_memset,
 501   LTI_bzero,
 502
 503   LTI_throw,
 504   LTI_rethrow,
 505   LTI_sjthrow,
 506   LTI_sjpopnthrow,
 507   LTI_terminate,
 508   LTI_setjmp,
 509   LTI_longjmp,
 510   LTI_eh_rtime_match,
 511
 512   LTI_eqhf2,
 513   LTI_nehf2,
 514   LTI_gthf2,
 515   LTI_gehf2,
 516   LTI_lthf2,
 517   LTI_lehf2,
 518   LTI_unordhf2,
 519
 520   LTI_eqsf2,
 521   LTI_nesf2,
 522   LTI_gtsf2,
 523   LTI_gesf2,
 524   LTI_ltsf2,
 525   LTI_lesf2,
 526   LTI_unordsf2,
 527
 528   LTI_eqdf2,
 529   LTI_nedf2,
 530   LTI_gtdf2,
 531   LTI_gedf2,
 532   LTI_ltdf2,
 533   LTI_ledf2,
 534   LTI_unorddf2,
 535
 536   LTI_eqxf2,
 537   LTI_nexf2,
 538   LTI_gtxf2,
 539   LTI_gexf2,
 540   LTI_ltxf2,
 541   LTI_lexf2,
 542   LTI_unordxf2,
 543
 544   LTI_eqtf2,
 545   LTI_netf2,
 546   LTI_gttf2,
 547   LTI_getf2,
 548   LTI_lttf2,
 549   LTI_letf2,
 550   LTI_unordtf2,
 551
 552   LTI_floatsisf,
 553   LTI_floatdisf,
 554   LTI_floattisf,
 555
 556   LTI_floatsidf,
 557   LTI_floatdidf,
 558   LTI_floattidf,
 559
 560   LTI_floatsixf,
 561   LTI_floatdixf,
 562   LTI_floattixf,
 563
 564   LTI_floatsitf,
 565   LTI_floatditf,
 566   LTI_floattitf,
 567
 568   LTI_fixsfsi,
 569   LTI_fixsfdi,
 570   LTI_fixsfti,
 571
 572   LTI_fixdfsi,
 573   LTI_fixdfdi,
 574   LTI_fixdfti,
 575
 576   LTI_fixxfsi,
 577   LTI_fixxfdi,
 578   LTI_fixxfti,
 579
 580   LTI_fixtfsi,
 581   LTI_fixtfdi,
 582   LTI_fixtfti,
 583
 584   LTI_fixunssfsi,
 585   LTI_fixunssfdi,
 586   LTI_fixunssfti,
 587
 588   LTI_fixunsdfsi,
 589   LTI_fixunsdfdi,
 590   LTI_fixunsdfti,
 591
 592   LTI_fixunsxfsi,
 593   LTI_fixunsxfdi,
 594   LTI_fixunsxfti,
 595
 596   LTI_fixunstfsi,
 597   LTI_fixunstfdi,
 598   LTI_fixunstfti,
 599
 600   LTI_chkr_check_addr,
 601   LTI_chkr_set_right,
 602   LTI_chkr_copy_bitmap,
 603   LTI_chkr_check_exec,
 604   LTI_chkr_check_str,
 605
 606   LTI_profile_function_entry,
 607   LTI_profile_function_exit,
 608
 609   LTI_MAX
 610 };
 611
 612 /* SYMBOL_REF rtx's for the library functions that are called
 613    implicitly and not via optabs.  */
 614 extern rtx libfunc_table[LTI_MAX];
 615
 616 /* Accessor macros for libfunc_table.  */
 617 #define extendsfdf2_libfunc     (libfunc_table[LTI_extendsfdf2])
 618 #define extendsfxf2_libfunc     (libfunc_table[LTI_extendsfxf2])
 619 #define extendsftf2_libfunc     (libfunc_table[LTI_extendsftf2])
 620 #define extenddfxf2_libfunc     (libfunc_table[LTI_extenddfxf2])
 621 #define extenddftf2_libfunc     (libfunc_table[LTI_extenddftf2])
 622
 623 #define truncdfsf2_libfunc      (libfunc_table[LTI_truncdfsf2])
 624 #define truncxfsf2_libfunc      (libfunc_table[LTI_truncxfsf2])
 625 #define trunctfsf2_libfunc      (libfunc_table[LTI_trunctfsf2])
 626 #define truncxfdf2_libfunc      (libfunc_table[LTI_truncxfdf2])
 627 #define trunctfdf2_libfunc      (libfunc_table[LTI_trunctfdf2])
 628
 629 #define memcpy_libfunc  (libfunc_table[LTI_memcpy])
 630 #define memmove_libfunc (libfunc_table[LTI_memmove])
 631 #define bcopy_libfunc   (libfunc_table[LTI_bcopy])
 632 #define memcmp_libfunc  (libfunc_table[LTI_memcmp])
 633 #define bcmp_libfunc    (libfunc_table[LTI_bcmp])
 634 #define memset_libfunc  (libfunc_table[LTI_memset])
 635 #define bzero_libfunc   (libfunc_table[LTI_bzero])
 636
 637 #define throw_libfunc   (libfunc_table[LTI_throw])
 638 #define rethrow_libfunc (libfunc_table[LTI_rethrow])
 639 #define sjthrow_libfunc (libfunc_table[LTI_sjthrow])
 640 #define sjpopnthrow_libfunc     (libfunc_table[LTI_sjpopnthrow])
 641 #define terminate_libfunc       (libfunc_table[LTI_terminate])
 642 #define setjmp_libfunc  (libfunc_table[LTI_setjmp])
 643 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
 644 #define eh_rtime_match_libfunc  (libfunc_table[LTI_eh_rtime_match])
 645
 646 #define eqhf2_libfunc   (libfunc_table[LTI_eqhf2])
 647 #define nehf2_libfunc   (libfunc_table[LTI_nehf2])
 648 #define gthf2_libfunc   (libfunc_table[LTI_gthf2])
 649 #define gehf2_libfunc   (libfunc_table[LTI_gehf2])
 650 #define lthf2_libfunc   (libfunc_table[LTI_lthf2])
 651 #define lehf2_libfunc   (libfunc_table[LTI_lehf2])
 652 #define unordhf2_libfunc        (libfunc_table[LTI_unordhf2])
 653
 654 #define eqsf2_libfunc   (libfunc_table[LTI_eqsf2])
 655 #define nesf2_libfunc   (libfunc_table[LTI_nesf2])
 656 #define gtsf2_libfunc   (libfunc_table[LTI_gtsf2])
 657 #define gesf2_libfunc   (libfunc_table[LTI_gesf2])
 658 #define ltsf2_libfunc   (libfunc_table[LTI_ltsf2])
 659 #define lesf2_libfunc   (libfunc_table[LTI_lesf2])
 660 #define unordsf2_libfunc        (libfunc_table[LTI_unordsf2])
 661
 662 #define eqdf2_libfunc   (libfunc_table[LTI_eqdf2])
 663 #define nedf2_libfunc   (libfunc_table[LTI_nedf2])
 664 #define gtdf2_libfunc   (libfunc_table[LTI_gtdf2])
 665 #define gedf2_libfunc   (libfunc_table[LTI_gedf2])
 666 #define ltdf2_libfunc   (libfunc_table[LTI_ltdf2])
 667 #define ledf2_libfunc   (libfunc_table[LTI_ledf2])
 668 #define unorddf2_libfunc        (libfunc_table[LTI_unorddf2])
 669
 670 #define eqxf2_libfunc   (libfunc_table[LTI_eqxf2])
 671 #define nexf2_libfunc   (libfunc_table[LTI_nexf2])
 672 #define gtxf2_libfunc   (libfunc_table[LTI_gtxf2])
 673 #define gexf2_libfunc   (libfunc_table[LTI_gexf2])
 674 #define ltxf2_libfunc   (libfunc_table[LTI_ltxf2])
 675 #define lexf2_libfunc   (libfunc_table[LTI_lexf2])
 676 #define unordxf2_libfunc        (libfunc_table[LTI_unordxf2])
 677
 678 #define eqtf2_libfunc   (libfunc_table[LTI_eqtf2])
 679 #define netf2_libfunc   (libfunc_table[LTI_netf2])
 680 #define gttf2_libfunc   (libfunc_table[LTI_gttf2])
 681 #define getf2_libfunc   (libfunc_table[LTI_getf2])
 682 #define lttf2_libfunc   (libfunc_table[LTI_lttf2])
 683 #define letf2_libfunc   (libfunc_table[LTI_letf2])
 684 #define unordtf2_libfunc        (libfunc_table[LTI_unordtf2])
 685
 686 #define floatsisf_libfunc       (libfunc_table[LTI_floatsisf])
 687 #define floatdisf_libfunc       (libfunc_table[LTI_floatdisf])
 688 #define floattisf_libfunc       (libfunc_table[LTI_floattisf])
 689
 690 #define floatsidf_libfunc       (libfunc_table[LTI_floatsidf])
 691 #define floatdidf_libfunc       (libfunc_table[LTI_floatdidf])
 692 #define floattidf_libfunc       (libfunc_table[LTI_floattidf])
 693
 694 #define floatsixf_libfunc       (libfunc_table[LTI_floatsixf])
 695 #define floatdixf_libfunc       (libfunc_table[LTI_floatdixf])
 696 #define floattixf_libfunc       (libfunc_table[LTI_floattixf])
 697
 698 #define floatsitf_libfunc       (libfunc_table[LTI_floatsitf])
 699 #define floatditf_libfunc       (libfunc_table[LTI_floatditf])
 700 #define floattitf_libfunc       (libfunc_table[LTI_floattitf])
 701
 702 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
 703 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
 704 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
 705
 706 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
 707 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
 708 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
 709
 710 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
 711 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
 712 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
 713
 714 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
 715 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
 716 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
 717
 718 #define fixunssfsi_libfunc      (libfunc_table[LTI_fixunssfsi])
 719 #define fixunssfdi_libfunc      (libfunc_table[LTI_fixunssfdi])
 720 #define fixunssfti_libfunc      (libfunc_table[LTI_fixunssfti])
 721
 722 #define fixunsdfsi_libfunc      (libfunc_table[LTI_fixunsdfsi])
 723 #define fixunsdfdi_libfunc      (libfunc_table[LTI_fixunsdfdi])
 724 #define fixunsdfti_libfunc      (libfunc_table[LTI_fixunsdfti])
 725
 726 #define fixunsxfsi_libfunc      (libfunc_table[LTI_fixunsxfsi])
 727 #define fixunsxfdi_libfunc      (libfunc_table[LTI_fixunsxfdi])
 728 #define fixunsxfti_libfunc      (libfunc_table[LTI_fixunsxfti])
 729
 730 #define fixunstfsi_libfunc      (libfunc_table[LTI_fixunstfsi])
 731 #define fixunstfdi_libfunc      (libfunc_table[LTI_fixunstfdi])
 732 #define fixunstfti_libfunc      (libfunc_table[LTI_fixunstfti])
 733
 734 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
 735 #define chkr_set_right_libfunc  (libfunc_table[LTI_chkr_set_right])
 736 #define chkr_copy_bitmap_libfunc        (libfunc_table[LTI_chkr_copy_bitmap])
 737 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
 738 #define chkr_check_str_libfunc  (libfunc_table[LTI_chkr_check_str])
 739
 740 #define profile_function_entry_libfunc  (libfunc_table[LTI_profile_function_entry])
 741 #define profile_function_exit_libfunc   (libfunc_table[LTI_profile_function_exit])
 742 \f
 743 typedef rtx (*rtxfun) PARAMS ((rtx));
 744
 745 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 746    gives the gen_function to make a branch to test that condition.  */
 747
 748 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 749
 750 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 751    gives the insn code to make a store-condition insn
 752    to test that condition.  */
 753
 754 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 755
 756 #ifdef HAVE_conditional_move
 757 /* Indexed by the machine mode, gives the insn code to make a conditional
 758    move insn.  */
 759
 760 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 761 #endif
 762
 763 /* This array records the insn_code of insns to perform block moves.  */
 764 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 765
 766 /* This array records the insn_code of insns to perform block clears.  */
 767 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 768
 769 /* Define functions given in optabs.c.  */
 770
 771 /* Expand a binary operation given optab and rtx operands.  */
 772 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
 773                                  int, enum optab_methods));
 774
 775 /* Expand a binary operation with both signed and unsigned forms.  */
 776 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
 777                                       rtx, rtx, int, enum optab_methods));
 778
 779 /* Generate code to perform an operation on two operands with two results.  */
 780 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
 781
 782 /* Expand a unary arithmetic operation given optab rtx operand.  */
 783 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
 784
 785 /* Expand the absolute value operation.  */
 786 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
 787
 788 /* Expand the complex absolute value operation.  */
 789 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 790
 791 /* Generate an instruction with a given INSN_CODE with an output and
 792    an input.  */
 793 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
 794
 795 /* Emit code to perform a series of operations on a multi-word quantity, one
 796    word at a time.  */
 797 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
 798
 799 /* Emit code to make a call to a constant function or a library call. */
 800 extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx));
 801
 802 /* Emit one rtl instruction to store zero in specified rtx.  */
 803 extern void emit_clr_insn PARAMS ((rtx));
 804
 805 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 806 extern void emit_0_to_1_insn PARAMS ((rtx));
 807
 808 /* Emit one rtl insn to compare two rtx's.  */
 809 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
 810                                    enum machine_mode, int, unsigned int));
 811
 812 /* Emit a pair of rtl insns to compare two rtx's and to jump
 813    to a label if the comparison is true.  */
 814 extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx,
 815                                              enum machine_mode, int,
 816                                              unsigned int, rtx));
 817
 818 /* The various uses that a comparison can have; used by can_compare_p:
 819    jumps, conditional moves, store flag operations.  */
 820 enum can_compare_purpose
 821 {
 822   ccp_jump,
 823   ccp_cmov,
 824   ccp_store_flag
 825 };
 826
 827 /* Nonzero if a compare of mode MODE can be done straightforwardly
 828    (without splitting it into pieces).  */
 829 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
 830                                   enum can_compare_purpose));
 831
 832 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
 833                                       enum machine_mode *, int *, int,
 834                                       enum can_compare_purpose));
 835
 836 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
 837                                     enum machine_mode, int));
 838
 839 /* Generate code to indirectly jump to a location given in the rtx LOC.  */
 840 extern void emit_indirect_jump PARAMS ((rtx));
 841
 842 #ifdef HAVE_conditional_move
 843 /* Emit a conditional move operation.  */
 844 rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx,
 845                                    enum machine_mode, rtx, rtx,
 846                                    enum machine_mode, int));
 847
 848 /* Return non-zero if the conditional move is supported.  */
 849 int can_conditionally_move_p PARAMS ((enum machine_mode mode));
 850
 851 #endif
 852
 853 /* Create but don't emit one rtl instruction to add one rtx into another.
 854    Modes must match; operands must meet the operation's predicates.
 855    Likewise for subtraction and for just copying.
 856    These do not call protect_from_queue; caller must do so.  */
 857 extern rtx gen_add2_insn PARAMS ((rtx, rtx));
 858 extern rtx gen_sub2_insn PARAMS ((rtx, rtx));
 859 extern rtx gen_move_insn PARAMS ((rtx, rtx));
 860 extern int have_add2_insn PARAMS ((enum machine_mode));
 861 extern int have_sub2_insn PARAMS ((enum machine_mode));
 862
 863 /* Return the INSN_CODE to use for an extend operation.  */
 864 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
 865                                             enum machine_mode, int));
 866
 867 /* Generate the body of an insn to extend Y (with mode MFROM)
 868    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 869 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
 870                                     enum machine_mode, int));
 871
 872 /* Initialize the tables that control conversion between fixed and
 873    floating values.  */
 874 extern void init_fixtab PARAMS ((void));
 875 extern void init_floattab PARAMS ((void));
 876
 877 /* Generate code for a FLOAT_EXPR.  */
 878 extern void expand_float PARAMS ((rtx, rtx, int));
 879
 880 /* Generate code for a FIX_EXPR.  */
 881 extern void expand_fix PARAMS ((rtx, rtx, int));
 882
 883 /* Call this to initialize an optab function entry.  */
 884 extern rtx init_one_libfunc PARAMS ((const char *));
 885
 886 /* Call this once to initialize the contents of the optabs
 887    appropriately for the current target machine.  */
 888 extern void init_optabs PARAMS ((void));
 889 \f
 890 /* Functions from expmed.c:  */
 891
 892 /* Arguments MODE, RTX: return an rtx for the negation of that value.
 893    May emit insns.  */
 894 extern rtx negate_rtx PARAMS ((enum machine_mode, rtx));
 895
 896 /* Expand a logical AND operation.  */
 897 extern rtx expand_and PARAMS ((rtx, rtx, rtx));
 898
 899 /* Emit a store-flag operation.  */
 900 extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx,
 901                                     enum machine_mode, int, int));
 902
 903 /* Like emit_store_flag, but always succeeds.  */
 904 extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx,
 905                                           enum machine_mode, int, int));
 906
 907 /* Functions from loop.c:  */
 908
 909 /* Given an insn and condition, return a canonical description of
 910    the test being made.  */
 911 extern rtx canonicalize_condition PARAMS ((rtx, rtx, int, rtx *, rtx));
 912
 913 /* Given a JUMP_INSN, return a canonical description of the test
 914    being made.  */
 915 extern rtx get_condition PARAMS ((rtx, rtx *));
 916
 917 /* Generate a conditional trap instruction.  */
 918 extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx));
 919 \f
 920 /* Functions from builtins.c:  */
 921 #ifdef TREE_CODE
 922 extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 923 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
 924 extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx));
 925 extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree));
 926 extern rtx expand_builtin_va_arg PARAMS ((tree, tree));
 927 #endif
 928
 929 extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx));
 930 extern void expand_builtin_setjmp_receiver PARAMS ((rtx));
 931 extern void expand_builtin_longjmp PARAMS ((rtx, rtx));
 932 extern rtx expand_builtin_saveregs PARAMS ((void));
 933 extern HOST_WIDE_INT get_varargs_alias_set PARAMS ((void));
 934 extern HOST_WIDE_INT get_frame_alias_set PARAMS ((void));
 935 extern void record_base_value           PARAMS ((unsigned int, rtx, int));
 936 extern void record_alias_subset         PARAMS ((HOST_WIDE_INT,
 937                                                  HOST_WIDE_INT));
 938 extern HOST_WIDE_INT new_alias_set              PARAMS ((void));
 939 \f
 940 /* Functions from expr.c:  */
 941
 942 /* This is run once per compilation to set up which modes can be used
 943    directly in memory and to initialize the block move optab.  */
 944 extern void init_expr_once PARAMS ((void));
 945
 946 /* This is run at the start of compiling a function.  */
 947 extern void init_expr PARAMS ((void));
 948
 949 /* This function is run once to initialize stor-layout.c.  */
 950
 951 extern void init_stor_layout_once PARAMS ((void));
 952
 953 /* This is run at the end of compiling a function.  */
 954 extern void finish_expr_for_function PARAMS ((void));
 955
 956 /* Use protect_from_queue to convert a QUEUED expression
 957    into something that you can put immediately into an instruction.  */
 958 extern rtx protect_from_queue PARAMS ((rtx, int));
 959
 960 /* Perform all the pending incrementations.  */
 961 extern void emit_queue PARAMS ((void));
 962
 963 /* Tell if something has a queued subexpression.  */
 964 extern int queued_subexp_p PARAMS ((rtx));
 965
 966 /* Emit some rtl insns to move data between rtx's, converting machine modes.
 967    Both modes must be floating or both fixed.  */
 968 extern void convert_move PARAMS ((rtx, rtx, int));
 969
 970 /* Convert an rtx to specified machine mode and return the result.  */
 971 extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int));
 972
 973 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 974 extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode,
 975                                   rtx, int));
 976
 977 /* Emit code to move a block Y to a block X.  */
 978 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, unsigned int));
 979
 980 /* Copy all or part of a value X into registers starting at REGNO.
 981    The number of registers to be filled is NREGS.  */
 982 extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode));
 983
 984 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
 985    The number of registers to be filled is NREGS.  */
 986 extern void move_block_from_reg PARAMS ((int, rtx, int, int));
 987
 988 /* Load a BLKmode value into non-consecutive registers represented by a
 989    PARALLEL.  */
 990 extern void emit_group_load PARAMS ((rtx, rtx, int, unsigned int));
 991
 992 /* Store a BLKmode value from non-consecutive registers represented by a
 993    PARALLEL.  */
 994 extern void emit_group_store PARAMS ((rtx, rtx, int, unsigned int));
 995
 996 #ifdef TREE_CODE
 997 /* Copy BLKmode object from a set of registers. */
 998 extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree));
 999 #endif
1000
1001 /* Mark REG as holding a parameter for the next CALL_INSN.  */
1002 extern void use_reg PARAMS ((rtx *, rtx));
1003
1004 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
1005    for the next CALL_INSN.  */
1006 extern void use_regs PARAMS ((rtx *, int, int));
1007
1008 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
1009 extern void use_group_regs PARAMS ((rtx *, rtx));
1010
1011 /* Write zeros through the storage of OBJECT.
1012    If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
1013    alignment.  */
1014 extern rtx clear_storage PARAMS ((rtx, rtx, unsigned int));
1015
1016 /* Return non-zero if it is desirable to store LEN bytes generated by
1017    CONSTFUN with several move instructions by store_by_pieces
1018    function.  CONSTFUNDATA is a pointer which will be passed as argument
1019    in every CONSTFUN call.
1020    ALIGN is maximum alignment we can assume.  */
1021 extern int can_store_by_pieces PARAMS ((unsigned HOST_WIDE_INT,
1022                                         rtx (*) (PTR, HOST_WIDE_INT,
1023                                                  enum machine_mode),
1024                                         PTR, unsigned int));
1025
1026 /* Generate several move instructions to store LEN bytes generated by
1027    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
1028    pointer which will be passed as argument in every CONSTFUN call.
1029    ALIGN is maximum alignment we can assume.  */
1030 extern void store_by_pieces PARAMS ((rtx, unsigned HOST_WIDE_INT,
1031                                      rtx (*) (PTR, HOST_WIDE_INT,
1032                                               enum machine_mode),
1033                                      PTR, unsigned int));
1034
1035 /* Emit insns to set X from Y.  */
1036 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1037
1038 /* Emit insns to set X from Y, with no frills.  */
1039 extern rtx emit_move_insn_1 PARAMS ((rtx, rtx));
1040
1041 /* Push a block of length SIZE (perhaps variable)
1042    and return an rtx to address the beginning of the block.  */
1043 extern rtx push_block PARAMS ((rtx, int, int));
1044
1045 /* Make an operand to push something on the stack.  */
1046 extern rtx gen_push_operand PARAMS ((void));
1047
1048 #ifdef TREE_CODE
1049 /* Generate code to push something onto the stack, given its mode and type.  */
1050 extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx,
1051                                     unsigned int, int, rtx, int, rtx, rtx,
1052                                     int, rtx));
1053
1054 /* Expand an assignment that stores the value of FROM into TO. */
1055 extern rtx expand_assignment PARAMS ((tree, tree, int, int));
1056
1057 /* Generate code for computing expression EXP,
1058    and storing the value into TARGET.
1059    If SUGGEST_REG is nonzero, copy the value through a register
1060    and return that register, if that is possible.  */
1061 extern rtx store_expr PARAMS ((tree, rtx, int));
1062 #endif
1063
1064 /* Given an rtx that may include add and multiply operations,
1065    generate them as insns and return a pseudo-reg containing the value.
1066    Useful after calling expand_expr with 1 as sum_ok.  */
1067 extern rtx force_operand PARAMS ((rtx, rtx));
1068
1069 #ifdef TREE_CODE
1070 /* Generate code for computing expression EXP.
1071    An rtx for the computed value is returned.  The value is never null.
1072    In the case of a void EXP, const0_rtx is returned.  */
1073 extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode,
1074                                 enum expand_modifier));
1075 #endif
1076
1077 /* At the start of a function, record that we have no previously-pushed
1078    arguments waiting to be popped.  */
1079 extern void init_pending_stack_adjust PARAMS ((void));
1080
1081 /* When exiting from function, if safe, clear out any pending stack adjust
1082    so the adjustment won't get done.  */
1083 extern void clear_pending_stack_adjust PARAMS ((void));
1084
1085 /* Pop any previously-pushed arguments that have not been popped yet.  */
1086 extern void do_pending_stack_adjust PARAMS ((void));
1087
1088 #ifdef TREE_CODE
1089 /* Return the tree node and offset if a given argument corresponds to
1090    a string constant.  */
1091 extern tree string_constant PARAMS ((tree, tree *));
1092
1093 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
1094 extern void jumpifnot PARAMS ((tree, rtx));
1095
1096 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
1097 extern void jumpif PARAMS ((tree, rtx));
1098
1099 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1100    the result is zero, or IF_TRUE_LABEL if the result is one.  */
1101 extern void do_jump PARAMS ((tree, rtx, rtx));
1102 #endif
1103
1104 /* Generate rtl to compare two rtx's, will call emit_cmp_insn.  */
1105 extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int,
1106                                      enum machine_mode, rtx, unsigned int));
1107 extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int,
1108                                              enum machine_mode, rtx,
1109                                              unsigned int, rtx, rtx));
1110
1111 /* Generate a tablejump instruction (used for switch statements).  */
1112 extern void do_tablejump PARAMS ((rtx, enum machine_mode, rtx, rtx, rtx));
1113 \f
1114 #ifdef TREE_CODE
1115 /* rtl.h and tree.h were included.  */
1116 /* Return an rtx for the size in bytes of the value of an expr.  */
1117 extern rtx expr_size PARAMS ((tree));
1118
1119 extern rtx lookup_static_chain PARAMS ((tree));
1120
1121 /* Convert a stack slot address ADDR valid in function FNDECL
1122    into an address valid in this function (using a static chain).  */
1123 extern rtx fix_lexical_addr PARAMS ((rtx, tree));
1124
1125 /* Return the address of the trampoline for entering nested fn FUNCTION.  */
1126 extern rtx trampoline_address PARAMS ((tree));
1127
1128 /* Return an rtx that refers to the value returned by a function
1129    in its original home.  This becomes invalid if any more code is emitted.  */
1130 extern rtx hard_function_value PARAMS ((tree, tree, int));
1131
1132 extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int));
1133
1134 extern rtx expand_call PARAMS ((tree, rtx, int));
1135
1136 extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree,
1137                                  rtx, int));
1138 extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx,
1139                                   rtx, rtx, int));
1140 extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree,
1141                                          struct args_size *,
1142                                          struct args_size *,
1143                                          struct args_size *,
1144                                          struct args_size *));
1145 extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx));
1146
1147 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary.  */
1148 extern rtx label_rtx PARAMS ((tree));
1149 #endif
1150
1151 /* Indicate how an input argument register was promoted.  */
1152 extern rtx promoted_input_arg PARAMS ((unsigned int, enum machine_mode *,
1153                                        int *));
1154
1155 /* Return an rtx like arg but sans any constant terms.
1156    Returns the original rtx if it has no constant terms.
1157    The constant terms are added and stored via a second arg.  */
1158 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1159
1160 /* Convert arg to a valid memory address for specified machine mode,
1161    by emitting insns to perform arithmetic if nec.  */
1162 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1163
1164 /* Like `memory_address' but pretent `flag_force_addr' is 0.  */
1165 extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx));
1166
1167 /* Return a memory reference like MEMREF, but with its mode changed
1168    to MODE and its address changed to ADDR.
1169    (VOIDmode means don't change the mode.
1170    NULL for ADDR means don't change the address.)  */
1171 extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx));
1172
1173 /* Return a memory reference like MEMREF, but which is known to have a
1174    valid address.  */
1175 extern rtx validize_mem PARAMS ((rtx));
1176
1177 #ifdef TREE_CODE
1178 /* Given REF, either a MEM or a REG, and T, either the type of X or
1179    the expression corresponding to REF, set RTX_UNCHANGING_P if
1180    appropriate.  */
1181 extern void maybe_set_unchanging PARAMS ((rtx, tree));
1182
1183 /* Given REF, a MEM, and T, either the type of X or the expression
1184    corresponding to REF, set the memory attributes.  OBJECTP is nonzero
1185    if we are making a new object of this type.  */
1186 extern void set_mem_attributes PARAMS ((rtx, tree, int));
1187 #endif
1188
1189 /* Assemble the static constant template for function entry trampolines.  */
1190 extern rtx assemble_trampoline_template PARAMS ((void));
1191
1192 /* Return 1 if two rtx's are equivalent in structure and elements.  */
1193 extern int rtx_equal_p PARAMS ((rtx, rtx));
1194
1195 /* Given rtx, return new rtx whose address won't be affected by
1196    any side effects.  It has been copied to a new temporary reg.  */
1197 extern rtx stabilize PARAMS ((rtx));
1198
1199 /* Given an rtx, copy all regs it refers to into new temps
1200    and return a modified copy that refers to the new temps.  */
1201 extern rtx copy_all_regs PARAMS ((rtx));
1202
1203 /* Copy given rtx to a new temp reg and return that.  */
1204 extern rtx copy_to_reg PARAMS ((rtx));
1205
1206 /* Like copy_to_reg but always make the reg Pmode.  */
1207 extern rtx copy_addr_to_reg PARAMS ((rtx));
1208
1209 /* Like copy_to_reg but always make the reg the specified mode MODE.  */
1210 extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx));
1211
1212 /* Copy given rtx to given temp reg and return that.  */
1213 extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode));
1214
1215 /* Copy a value to a register if it isn't already a register.
1216    Args are mode (in case value is a constant) and the value.  */
1217 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1218
1219 /* Return given rtx, copied into a new temp reg if it was in memory.  */
1220 extern rtx force_not_mem PARAMS ((rtx));
1221
1222 #ifdef TREE_CODE
1223 /* Return mode and signedness to use when object is promoted.  */
1224 extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode,
1225                                                int *, int));
1226 #endif
1227
1228 /* Remove some bytes from the stack.  An rtx says how many.  */
1229 extern void adjust_stack PARAMS ((rtx));
1230
1231 /* Add some bytes to the stack.  An rtx says how many.  */
1232 extern void anti_adjust_stack PARAMS ((rtx));
1233
1234 /* This enum is used for the following two functions.  */
1235 enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
1236
1237 /* Save the stack pointer at the specified level.  */
1238 extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx));
1239
1240 /* Restore the stack pointer from a save area of the specified level.  */
1241 extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx));
1242
1243 /* Allocate some space on the stack dynamically and return its address.  An rtx
1244    says how many bytes.  */
1245 extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int));
1246
1247 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1248    FIRST is a constant and size is a Pmode RTX.  These are offsets from the
1249    current stack pointer.  STACK_GROWS_DOWNWARD says whether to add or
1250    subtract from the stack.  If SIZE is constant, this is done
1251    with a fixed number of probes.  Otherwise, we must make a loop.  */
1252 extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx));
1253
1254 /* Return an rtx that refers to the value returned by a library call
1255    in its original home.  This becomes invalid if any more code is emitted.  */
1256 extern rtx hard_libcall_value PARAMS ((enum machine_mode));
1257
1258 /* Given an rtx, return an rtx for a value rounded up to a multiple
1259    of STACK_BOUNDARY / BITS_PER_UNIT.  */
1260 extern rtx round_push PARAMS ((rtx));
1261
1262 extern rtx store_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1263                                     unsigned HOST_WIDE_INT,
1264                                     enum machine_mode, rtx,
1265                                     unsigned int, HOST_WIDE_INT));
1266 extern rtx extract_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1267                                       unsigned HOST_WIDE_INT, int, rtx,
1268                                       enum machine_mode, enum machine_mode,
1269                                       unsigned int, HOST_WIDE_INT));
1270 extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int));
1271 extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int));
1272 extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int));
1273
1274 extern rtx assemble_static_space PARAMS ((int));
1275
1276 /* Hook called by expand_expr for language-specific tree codes.
1277    It is up to the language front end to install a hook
1278    if it has any such codes that expand_expr needs to know about.  */
1279 extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
1280                                         enum machine_mode,
1281                                         enum expand_modifier modifier));
1282
1283 #ifdef TREE_CODE
1284 /* Hook called by output_constant for language-specific tree codes.
1285    It is up to the language front-end to install a hook if it has any
1286    such codes that output_constant needs to know about.  Returns a
1287    language-independent constant equivalent to its input.  */
1288 extern tree (*lang_expand_constant) PARAMS ((tree));
1289
1290 extern int safe_from_p PARAMS ((rtx, tree, int));
1291
1292 /* Hook called by safe_from_p for language-specific tree codes.  It is
1293    up to the language front-end to install a hook if it has any such
1294    codes that safe_from_p needs to know about.  Since same_from_p will
1295    recursively explore the TREE_OPERANDs of an expression, this hook
1296    should not reexamine those pieces.  This routine may recursively
1297    call safe_from_p; it should always pass `0' as the TOP_P
1298    parameter.  */
1299 extern int (*lang_safe_from_p) PARAMS ((rtx, tree));
1300 #endif
1301
1302 extern void init_all_optabs                     PARAMS ((void));
1303 extern void do_jump_by_parts_equality_rtx       PARAMS ((rtx, rtx, rtx));
1304 extern void do_jump_by_parts_greater_rtx        PARAMS ((enum machine_mode,
1305                                                          int, rtx, rtx, rtx,
1306                                                          rtx));
1307
1308 #ifdef TREE_CODE   /* Don't lose if tree.h not included.  */
1309 extern void mark_seen_cases                     PARAMS ((tree, unsigned char *,
1310                                                          HOST_WIDE_INT, int));
1311 #endif