gcc/expr.h

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