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_bcopy,
 484   LTI_memcmp,
 485   LTI_bcmp,
 486   LTI_memset,
 487   LTI_bzero,
 488
 489   LTI_unwind_resume,
 490   LTI_eh_personality,
 491   LTI_setjmp,
 492   LTI_longjmp,
 493   LTI_unwind_sjlj_register,
 494   LTI_unwind_sjlj_unregister,
 495
 496   LTI_eqhf2,
 497   LTI_nehf2,
 498   LTI_gthf2,
 499   LTI_gehf2,
 500   LTI_lthf2,
 501   LTI_lehf2,
 502   LTI_unordhf2,
 503
 504   LTI_eqsf2,
 505   LTI_nesf2,
 506   LTI_gtsf2,
 507   LTI_gesf2,
 508   LTI_ltsf2,
 509   LTI_lesf2,
 510   LTI_unordsf2,
 511
 512   LTI_eqdf2,
 513   LTI_nedf2,
 514   LTI_gtdf2,
 515   LTI_gedf2,
 516   LTI_ltdf2,
 517   LTI_ledf2,
 518   LTI_unorddf2,
 519
 520   LTI_eqxf2,
 521   LTI_nexf2,
 522   LTI_gtxf2,
 523   LTI_gexf2,
 524   LTI_ltxf2,
 525   LTI_lexf2,
 526   LTI_unordxf2,
 527
 528   LTI_eqtf2,
 529   LTI_netf2,
 530   LTI_gttf2,
 531   LTI_getf2,
 532   LTI_lttf2,
 533   LTI_letf2,
 534   LTI_unordtf2,
 535
 536   LTI_floatsisf,
 537   LTI_floatdisf,
 538   LTI_floattisf,
 539
 540   LTI_floatsidf,
 541   LTI_floatdidf,
 542   LTI_floattidf,
 543
 544   LTI_floatsixf,
 545   LTI_floatdixf,
 546   LTI_floattixf,
 547
 548   LTI_floatsitf,
 549   LTI_floatditf,
 550   LTI_floattitf,
 551
 552   LTI_fixsfsi,
 553   LTI_fixsfdi,
 554   LTI_fixsfti,
 555
 556   LTI_fixdfsi,
 557   LTI_fixdfdi,
 558   LTI_fixdfti,
 559
 560   LTI_fixxfsi,
 561   LTI_fixxfdi,
 562   LTI_fixxfti,
 563
 564   LTI_fixtfsi,
 565   LTI_fixtfdi,
 566   LTI_fixtfti,
 567
 568   LTI_fixunssfsi,
 569   LTI_fixunssfdi,
 570   LTI_fixunssfti,
 571
 572   LTI_fixunsdfsi,
 573   LTI_fixunsdfdi,
 574   LTI_fixunsdfti,
 575
 576   LTI_fixunsxfsi,
 577   LTI_fixunsxfdi,
 578   LTI_fixunsxfti,
 579
 580   LTI_fixunstfsi,
 581   LTI_fixunstfdi,
 582   LTI_fixunstfti,
 583
 584   LTI_chkr_check_addr,
 585   LTI_chkr_set_right,
 586   LTI_chkr_copy_bitmap,
 587   LTI_chkr_check_exec,
 588   LTI_chkr_check_str,
 589
 590   LTI_profile_function_entry,
 591   LTI_profile_function_exit,
 592
 593   LTI_MAX
 594 };
 595
 596 /* SYMBOL_REF rtx's for the library functions that are called
 597    implicitly and not via optabs.  */
 598 extern rtx libfunc_table[LTI_MAX];
 599
 600 /* Accessor macros for libfunc_table.  */
 601 #define extendsfdf2_libfunc     (libfunc_table[LTI_extendsfdf2])
 602 #define extendsfxf2_libfunc     (libfunc_table[LTI_extendsfxf2])
 603 #define extendsftf2_libfunc     (libfunc_table[LTI_extendsftf2])
 604 #define extenddfxf2_libfunc     (libfunc_table[LTI_extenddfxf2])
 605 #define extenddftf2_libfunc     (libfunc_table[LTI_extenddftf2])
 606
 607 #define truncdfsf2_libfunc      (libfunc_table[LTI_truncdfsf2])
 608 #define truncxfsf2_libfunc      (libfunc_table[LTI_truncxfsf2])
 609 #define trunctfsf2_libfunc      (libfunc_table[LTI_trunctfsf2])
 610 #define truncxfdf2_libfunc      (libfunc_table[LTI_truncxfdf2])
 611 #define trunctfdf2_libfunc      (libfunc_table[LTI_trunctfdf2])
 612
 613 #define memcpy_libfunc  (libfunc_table[LTI_memcpy])
 614 #define bcopy_libfunc   (libfunc_table[LTI_bcopy])
 615 #define memcmp_libfunc  (libfunc_table[LTI_memcmp])
 616 #define bcmp_libfunc    (libfunc_table[LTI_bcmp])
 617 #define memset_libfunc  (libfunc_table[LTI_memset])
 618 #define bzero_libfunc   (libfunc_table[LTI_bzero])
 619
 620 #define unwind_resume_libfunc   (libfunc_table[LTI_unwind_resume])
 621 #define eh_personality_libfunc  (libfunc_table[LTI_eh_personality])
 622 #define setjmp_libfunc  (libfunc_table[LTI_setjmp])
 623 #define longjmp_libfunc (libfunc_table[LTI_longjmp])
 624 #define unwind_sjlj_register_libfunc (libfunc_table[LTI_unwind_sjlj_register])
 625 #define unwind_sjlj_unregister_libfunc \
 626   (libfunc_table[LTI_unwind_sjlj_unregister])
 627
 628 #define eqhf2_libfunc   (libfunc_table[LTI_eqhf2])
 629 #define nehf2_libfunc   (libfunc_table[LTI_nehf2])
 630 #define gthf2_libfunc   (libfunc_table[LTI_gthf2])
 631 #define gehf2_libfunc   (libfunc_table[LTI_gehf2])
 632 #define lthf2_libfunc   (libfunc_table[LTI_lthf2])
 633 #define lehf2_libfunc   (libfunc_table[LTI_lehf2])
 634 #define unordhf2_libfunc        (libfunc_table[LTI_unordhf2])
 635
 636 #define eqsf2_libfunc   (libfunc_table[LTI_eqsf2])
 637 #define nesf2_libfunc   (libfunc_table[LTI_nesf2])
 638 #define gtsf2_libfunc   (libfunc_table[LTI_gtsf2])
 639 #define gesf2_libfunc   (libfunc_table[LTI_gesf2])
 640 #define ltsf2_libfunc   (libfunc_table[LTI_ltsf2])
 641 #define lesf2_libfunc   (libfunc_table[LTI_lesf2])
 642 #define unordsf2_libfunc        (libfunc_table[LTI_unordsf2])
 643
 644 #define eqdf2_libfunc   (libfunc_table[LTI_eqdf2])
 645 #define nedf2_libfunc   (libfunc_table[LTI_nedf2])
 646 #define gtdf2_libfunc   (libfunc_table[LTI_gtdf2])
 647 #define gedf2_libfunc   (libfunc_table[LTI_gedf2])
 648 #define ltdf2_libfunc   (libfunc_table[LTI_ltdf2])
 649 #define ledf2_libfunc   (libfunc_table[LTI_ledf2])
 650 #define unorddf2_libfunc        (libfunc_table[LTI_unorddf2])
 651
 652 #define eqxf2_libfunc   (libfunc_table[LTI_eqxf2])
 653 #define nexf2_libfunc   (libfunc_table[LTI_nexf2])
 654 #define gtxf2_libfunc   (libfunc_table[LTI_gtxf2])
 655 #define gexf2_libfunc   (libfunc_table[LTI_gexf2])
 656 #define ltxf2_libfunc   (libfunc_table[LTI_ltxf2])
 657 #define lexf2_libfunc   (libfunc_table[LTI_lexf2])
 658 #define unordxf2_libfunc        (libfunc_table[LTI_unordxf2])
 659
 660 #define eqtf2_libfunc   (libfunc_table[LTI_eqtf2])
 661 #define netf2_libfunc   (libfunc_table[LTI_netf2])
 662 #define gttf2_libfunc   (libfunc_table[LTI_gttf2])
 663 #define getf2_libfunc   (libfunc_table[LTI_getf2])
 664 #define lttf2_libfunc   (libfunc_table[LTI_lttf2])
 665 #define letf2_libfunc   (libfunc_table[LTI_letf2])
 666 #define unordtf2_libfunc        (libfunc_table[LTI_unordtf2])
 667
 668 #define floatsisf_libfunc       (libfunc_table[LTI_floatsisf])
 669 #define floatdisf_libfunc       (libfunc_table[LTI_floatdisf])
 670 #define floattisf_libfunc       (libfunc_table[LTI_floattisf])
 671
 672 #define floatsidf_libfunc       (libfunc_table[LTI_floatsidf])
 673 #define floatdidf_libfunc       (libfunc_table[LTI_floatdidf])
 674 #define floattidf_libfunc       (libfunc_table[LTI_floattidf])
 675
 676 #define floatsixf_libfunc       (libfunc_table[LTI_floatsixf])
 677 #define floatdixf_libfunc       (libfunc_table[LTI_floatdixf])
 678 #define floattixf_libfunc       (libfunc_table[LTI_floattixf])
 679
 680 #define floatsitf_libfunc       (libfunc_table[LTI_floatsitf])
 681 #define floatditf_libfunc       (libfunc_table[LTI_floatditf])
 682 #define floattitf_libfunc       (libfunc_table[LTI_floattitf])
 683
 684 #define fixsfsi_libfunc (libfunc_table[LTI_fixsfsi])
 685 #define fixsfdi_libfunc (libfunc_table[LTI_fixsfdi])
 686 #define fixsfti_libfunc (libfunc_table[LTI_fixsfti])
 687
 688 #define fixdfsi_libfunc (libfunc_table[LTI_fixdfsi])
 689 #define fixdfdi_libfunc (libfunc_table[LTI_fixdfdi])
 690 #define fixdfti_libfunc (libfunc_table[LTI_fixdfti])
 691
 692 #define fixxfsi_libfunc (libfunc_table[LTI_fixxfsi])
 693 #define fixxfdi_libfunc (libfunc_table[LTI_fixxfdi])
 694 #define fixxfti_libfunc (libfunc_table[LTI_fixxfti])
 695
 696 #define fixtfsi_libfunc (libfunc_table[LTI_fixtfsi])
 697 #define fixtfdi_libfunc (libfunc_table[LTI_fixtfdi])
 698 #define fixtfti_libfunc (libfunc_table[LTI_fixtfti])
 699
 700 #define fixunssfsi_libfunc      (libfunc_table[LTI_fixunssfsi])
 701 #define fixunssfdi_libfunc      (libfunc_table[LTI_fixunssfdi])
 702 #define fixunssfti_libfunc      (libfunc_table[LTI_fixunssfti])
 703
 704 #define fixunsdfsi_libfunc      (libfunc_table[LTI_fixunsdfsi])
 705 #define fixunsdfdi_libfunc      (libfunc_table[LTI_fixunsdfdi])
 706 #define fixunsdfti_libfunc      (libfunc_table[LTI_fixunsdfti])
 707
 708 #define fixunsxfsi_libfunc      (libfunc_table[LTI_fixunsxfsi])
 709 #define fixunsxfdi_libfunc      (libfunc_table[LTI_fixunsxfdi])
 710 #define fixunsxfti_libfunc      (libfunc_table[LTI_fixunsxfti])
 711
 712 #define fixunstfsi_libfunc      (libfunc_table[LTI_fixunstfsi])
 713 #define fixunstfdi_libfunc      (libfunc_table[LTI_fixunstfdi])
 714 #define fixunstfti_libfunc      (libfunc_table[LTI_fixunstfti])
 715
 716 #define chkr_check_addr_libfunc (libfunc_table[LTI_chkr_check_addr])
 717 #define chkr_set_right_libfunc  (libfunc_table[LTI_chkr_set_right])
 718 #define chkr_copy_bitmap_libfunc        (libfunc_table[LTI_chkr_copy_bitmap])
 719 #define chkr_check_exec_libfunc (libfunc_table[LTI_chkr_check_exec])
 720 #define chkr_check_str_libfunc  (libfunc_table[LTI_chkr_check_str])
 721
 722 #define profile_function_entry_libfunc  (libfunc_table[LTI_profile_function_entry])
 723 #define profile_function_exit_libfunc   (libfunc_table[LTI_profile_function_exit])
 724 \f
 725 typedef rtx (*rtxfun) PARAMS ((rtx));
 726
 727 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 728    gives the gen_function to make a branch to test that condition.  */
 729
 730 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 731
 732 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 733    gives the insn code to make a store-condition insn
 734    to test that condition.  */
 735
 736 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 737
 738 #ifdef HAVE_conditional_move
 739 /* Indexed by the machine mode, gives the insn code to make a conditional
 740    move insn.  */
 741
 742 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 743 #endif
 744
 745 /* This array records the insn_code of insns to perform block moves.  */
 746 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 747
 748 /* This array records the insn_code of insns to perform block clears.  */
 749 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 750
 751 /* Define functions given in optabs.c.  */
 752
 753 /* Expand a binary operation given optab and rtx operands.  */
 754 extern rtx expand_binop PARAMS ((enum machine_mode, optab, rtx, rtx, rtx,
 755                                  int, enum optab_methods));
 756
 757 /* Expand a binary operation with both signed and unsigned forms.  */
 758 extern rtx sign_expand_binop PARAMS ((enum machine_mode, optab, optab, rtx,
 759                                       rtx, rtx, int, enum optab_methods));
 760
 761 /* Generate code to perform an operation on two operands with two results.  */
 762 extern int expand_twoval_binop PARAMS ((optab, rtx, rtx, rtx, rtx, int));
 763
 764 /* Expand a unary arithmetic operation given optab rtx operand.  */
 765 extern rtx expand_unop PARAMS ((enum machine_mode, optab, rtx, rtx, int));
 766
 767 /* Expand the absolute value operation.  */
 768 extern rtx expand_abs PARAMS ((enum machine_mode, rtx, rtx, int, int));
 769
 770 /* Expand the complex absolute value operation.  */
 771 extern rtx expand_complex_abs PARAMS ((enum machine_mode, rtx, rtx, int));
 772
 773 /* Generate an instruction with a given INSN_CODE with an output and
 774    an input.  */
 775 extern void emit_unop_insn PARAMS ((int, rtx, rtx, enum rtx_code));
 776
 777 /* Emit code to perform a series of operations on a multi-word quantity, one
 778    word at a time.  */
 779 extern rtx emit_no_conflict_block PARAMS ((rtx, rtx, rtx, rtx, rtx));
 780
 781 /* Emit code to make a call to a constant function or a library call. */
 782 extern void emit_libcall_block PARAMS ((rtx, rtx, rtx, rtx));
 783
 784 /* Emit one rtl instruction to store zero in specified rtx.  */
 785 extern void emit_clr_insn PARAMS ((rtx));
 786
 787 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 788 extern void emit_0_to_1_insn PARAMS ((rtx));
 789
 790 /* Emit one rtl insn to compare two rtx's.  */
 791 extern void emit_cmp_insn PARAMS ((rtx, rtx, enum rtx_code, rtx,
 792                                    enum machine_mode, int, unsigned int));
 793
 794 /* Emit a pair of rtl insns to compare two rtx's and to jump
 795    to a label if the comparison is true.  */
 796 extern void emit_cmp_and_jump_insns PARAMS ((rtx, rtx, enum rtx_code, rtx,
 797                                              enum machine_mode, int,
 798                                              unsigned int, rtx));
 799
 800 /* The various uses that a comparison can have; used by can_compare_p:
 801    jumps, conditional moves, store flag operations.  */
 802 enum can_compare_purpose
 803 {
 804   ccp_jump,
 805   ccp_cmov,
 806   ccp_store_flag
 807 };
 808
 809 /* Nonzero if a compare of mode MODE can be done straightforwardly
 810    (without splitting it into pieces).  */
 811 extern int can_compare_p PARAMS ((enum rtx_code, enum machine_mode,
 812                                   enum can_compare_purpose));
 813
 814 extern void prepare_cmp_insn PARAMS ((rtx *, rtx *, enum rtx_code *, rtx,
 815                                       enum machine_mode *, int *, int,
 816                                       enum can_compare_purpose));
 817
 818 extern rtx prepare_operand PARAMS ((int, rtx, int, enum machine_mode,
 819                                     enum machine_mode, int));
 820
 821 /* Generate code to indirectly jump to a location given in the rtx LOC.  */
 822 extern void emit_indirect_jump PARAMS ((rtx));
 823
 824 #ifdef HAVE_conditional_move
 825 /* Emit a conditional move operation.  */
 826 rtx emit_conditional_move PARAMS ((rtx, enum rtx_code, rtx, rtx,
 827                                    enum machine_mode, rtx, rtx,
 828                                    enum machine_mode, int));
 829
 830 /* Return non-zero if the conditional move is supported.  */
 831 int can_conditionally_move_p PARAMS ((enum machine_mode mode));
 832
 833 #endif
 834
 835 /* Create but don't emit one rtl instruction to add one rtx into another.
 836    Modes must match; operands must meet the operation's predicates.
 837    Likewise for subtraction and for just copying.
 838    These do not call protect_from_queue; caller must do so.  */
 839 extern rtx gen_add2_insn PARAMS ((rtx, rtx));
 840 extern rtx gen_sub2_insn PARAMS ((rtx, rtx));
 841 extern rtx gen_move_insn PARAMS ((rtx, rtx));
 842 extern int have_add2_insn PARAMS ((enum machine_mode));
 843 extern int have_sub2_insn PARAMS ((enum machine_mode));
 844
 845 /* Return the INSN_CODE to use for an extend operation.  */
 846 extern enum insn_code can_extend_p PARAMS ((enum machine_mode,
 847                                             enum machine_mode, int));
 848
 849 /* Generate the body of an insn to extend Y (with mode MFROM)
 850    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 851 extern rtx gen_extend_insn PARAMS ((rtx, rtx, enum machine_mode,
 852                                     enum machine_mode, int));
 853
 854 /* Initialize the tables that control conversion between fixed and
 855    floating values.  */
 856 extern void init_fixtab PARAMS ((void));
 857 extern void init_floattab PARAMS ((void));
 858
 859 /* Generate code for a FLOAT_EXPR.  */
 860 extern void expand_float PARAMS ((rtx, rtx, int));
 861
 862 /* Generate code for a FIX_EXPR.  */
 863 extern void expand_fix PARAMS ((rtx, rtx, int));
 864
 865 /* Call this to initialize an optab function entry.  */
 866 extern rtx init_one_libfunc PARAMS ((const char *));
 867
 868 /* Call this once to initialize the contents of the optabs
 869    appropriately for the current target machine.  */
 870 extern void init_optabs PARAMS ((void));
 871 \f
 872 /* Functions from expmed.c:  */
 873
 874 /* Arguments MODE, RTX: return an rtx for the negation of that value.
 875    May emit insns.  */
 876 extern rtx negate_rtx PARAMS ((enum machine_mode, rtx));
 877
 878 /* Expand a logical AND operation.  */
 879 extern rtx expand_and PARAMS ((rtx, rtx, rtx));
 880
 881 /* Emit a store-flag operation.  */
 882 extern rtx emit_store_flag PARAMS ((rtx, enum rtx_code, rtx, rtx,
 883                                     enum machine_mode, int, int));
 884
 885 /* Like emit_store_flag, but always succeeds.  */
 886 extern rtx emit_store_flag_force PARAMS ((rtx, enum rtx_code, rtx, rtx,
 887                                           enum machine_mode, int, int));
 888
 889 /* Functions from loop.c:  */
 890
 891 /* Given an insn and condition, return a canonical description of
 892    the test being made.  */
 893 extern rtx canonicalize_condition PARAMS ((rtx, rtx, int, rtx *, rtx));
 894
 895 /* Given a JUMP_INSN, return a canonical description of the test
 896    being made.  */
 897 extern rtx get_condition PARAMS ((rtx, rtx *));
 898
 899 /* Generate a conditional trap instruction.  */
 900 extern rtx gen_cond_trap PARAMS ((enum rtx_code, rtx, rtx, rtx));
 901 \f
 902 /* Functions from builtins.c:  */
 903 #ifdef TREE_CODE
 904 extern rtx expand_builtin PARAMS ((tree, rtx, rtx, enum machine_mode, int));
 905 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
 906 extern void std_expand_builtin_va_start PARAMS ((int, tree, rtx));
 907 extern rtx std_expand_builtin_va_arg PARAMS ((tree, tree));
 908 extern rtx expand_builtin_va_arg PARAMS ((tree, tree));
 909 #endif
 910
 911 extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx));
 912 extern void expand_builtin_setjmp_receiver PARAMS ((rtx));
 913 extern void expand_builtin_longjmp PARAMS ((rtx, rtx));
 914 extern rtx expand_builtin_saveregs PARAMS ((void));
 915 extern HOST_WIDE_INT get_varargs_alias_set PARAMS ((void));
 916 extern HOST_WIDE_INT get_frame_alias_set PARAMS ((void));
 917 extern void record_base_value           PARAMS ((unsigned int, rtx, int));
 918 extern void record_alias_subset         PARAMS ((HOST_WIDE_INT,
 919                                                  HOST_WIDE_INT));
 920 extern HOST_WIDE_INT new_alias_set              PARAMS ((void));
 921 \f
 922 /* Functions from expr.c:  */
 923
 924 /* This is run once per compilation to set up which modes can be used
 925    directly in memory and to initialize the block move optab.  */
 926 extern void init_expr_once PARAMS ((void));
 927
 928 /* This is run at the start of compiling a function.  */
 929 extern void init_expr PARAMS ((void));
 930
 931 /* This function is run once to initialize stor-layout.c.  */
 932
 933 extern void init_stor_layout_once PARAMS ((void));
 934
 935 /* This is run at the end of compiling a function.  */
 936 extern void finish_expr_for_function PARAMS ((void));
 937
 938 /* Use protect_from_queue to convert a QUEUED expression
 939    into something that you can put immediately into an instruction.  */
 940 extern rtx protect_from_queue PARAMS ((rtx, int));
 941
 942 /* Perform all the pending incrementations.  */
 943 extern void emit_queue PARAMS ((void));
 944
 945 /* Tell if something has a queued subexpression.  */
 946 extern int queued_subexp_p PARAMS ((rtx));
 947
 948 /* Emit some rtl insns to move data between rtx's, converting machine modes.
 949    Both modes must be floating or both fixed.  */
 950 extern void convert_move PARAMS ((rtx, rtx, int));
 951
 952 /* Convert an rtx to specified machine mode and return the result.  */
 953 extern rtx convert_to_mode PARAMS ((enum machine_mode, rtx, int));
 954
 955 /* Convert an rtx to MODE from OLDMODE and return the result.  */
 956 extern rtx convert_modes PARAMS ((enum machine_mode, enum machine_mode,
 957                                   rtx, int));
 958
 959 /* Emit code to move a block Y to a block X.  */
 960 extern rtx emit_block_move PARAMS ((rtx, rtx, rtx, unsigned int));
 961
 962 /* Copy all or part of a value X into registers starting at REGNO.
 963    The number of registers to be filled is NREGS.  */
 964 extern void move_block_to_reg PARAMS ((int, rtx, int, enum machine_mode));
 965
 966 /* Copy all or part of a BLKmode value X out of registers starting at REGNO.
 967    The number of registers to be filled is NREGS.  */
 968 extern void move_block_from_reg PARAMS ((int, rtx, int, int));
 969
 970 /* Load a BLKmode value into non-consecutive registers represented by a
 971    PARALLEL.  */
 972 extern void emit_group_load PARAMS ((rtx, rtx, int, unsigned int));
 973
 974 /* Store a BLKmode value from non-consecutive registers represented by a
 975    PARALLEL.  */
 976 extern void emit_group_store PARAMS ((rtx, rtx, int, unsigned int));
 977
 978 #ifdef TREE_CODE
 979 /* Copy BLKmode object from a set of registers. */
 980 extern rtx copy_blkmode_from_reg PARAMS ((rtx,rtx,tree));
 981 #endif
 982
 983 /* Mark REG as holding a parameter for the next CALL_INSN.  */
 984 extern void use_reg PARAMS ((rtx *, rtx));
 985
 986 /* Mark NREGS consecutive regs, starting at REGNO, as holding parameters
 987    for the next CALL_INSN.  */
 988 extern void use_regs PARAMS ((rtx *, int, int));
 989
 990 /* Mark a PARALLEL as holding a parameter for the next CALL_INSN.  */
 991 extern void use_group_regs PARAMS ((rtx *, rtx));
 992
 993 /* Write zeros through the storage of OBJECT.
 994    If OBJECT has BLKmode, SIZE is its length in bytes and ALIGN is its
 995    alignment.  */
 996 extern rtx clear_storage PARAMS ((rtx, rtx, unsigned int));
 997
 998 /* Return non-zero if it is desirable to store LEN bytes generated by
 999    CONSTFUN with several move instructions by store_by_pieces
1000    function.  CONSTFUNDATA is a pointer which will be passed as argument
1001    in every CONSTFUN call.
1002    ALIGN is maximum alignment we can assume.  */
1003 extern int can_store_by_pieces PARAMS ((unsigned HOST_WIDE_INT,
1004                                         rtx (*) (PTR, HOST_WIDE_INT,
1005                                                  enum machine_mode),
1006                                         PTR, unsigned int));
1007
1008 /* Generate several move instructions to store LEN bytes generated by
1009    CONSTFUN to block TO.  (A MEM rtx with BLKmode).  CONSTFUNDATA is a
1010    pointer which will be passed as argument in every CONSTFUN call.
1011    ALIGN is maximum alignment we can assume.  */
1012 extern void store_by_pieces PARAMS ((rtx, unsigned HOST_WIDE_INT,
1013                                      rtx (*) (PTR, HOST_WIDE_INT,
1014                                               enum machine_mode),
1015                                      PTR, unsigned int));
1016
1017 /* Emit insns to set X from Y.  */
1018 extern rtx emit_move_insn PARAMS ((rtx, rtx));
1019
1020 /* Emit insns to set X from Y, with no frills.  */
1021 extern rtx emit_move_insn_1 PARAMS ((rtx, rtx));
1022
1023 /* Push a block of length SIZE (perhaps variable)
1024    and return an rtx to address the beginning of the block.  */
1025 extern rtx push_block PARAMS ((rtx, int, int));
1026
1027 #ifdef TREE_CODE
1028 /* Generate code to push something onto the stack, given its mode and type.  */
1029 extern void emit_push_insn PARAMS ((rtx, enum machine_mode, tree, rtx,
1030                                     unsigned int, int, rtx, int, rtx, rtx,
1031                                     int, rtx));
1032
1033 /* Expand an assignment that stores the value of FROM into TO. */
1034 extern rtx expand_assignment PARAMS ((tree, tree, int, int));
1035
1036 /* Generate code for computing expression EXP,
1037    and storing the value into TARGET.
1038    If SUGGEST_REG is nonzero, copy the value through a register
1039    and return that register, if that is possible.  */
1040 extern rtx store_expr PARAMS ((tree, rtx, int));
1041 #endif
1042
1043 /* Given an rtx that may include add and multiply operations,
1044    generate them as insns and return a pseudo-reg containing the value.
1045    Useful after calling expand_expr with 1 as sum_ok.  */
1046 extern rtx force_operand PARAMS ((rtx, rtx));
1047
1048 #ifdef TREE_CODE
1049 /* Generate code for computing expression EXP.
1050    An rtx for the computed value is returned.  The value is never null.
1051    In the case of a void EXP, const0_rtx is returned.  */
1052 extern rtx expand_expr PARAMS ((tree, rtx, enum machine_mode,
1053                                 enum expand_modifier));
1054 #endif
1055
1056 /* At the start of a function, record that we have no previously-pushed
1057    arguments waiting to be popped.  */
1058 extern void init_pending_stack_adjust PARAMS ((void));
1059
1060 /* When exiting from function, if safe, clear out any pending stack adjust
1061    so the adjustment won't get done.  */
1062 extern void clear_pending_stack_adjust PARAMS ((void));
1063
1064 /* Pop any previously-pushed arguments that have not been popped yet.  */
1065 extern void do_pending_stack_adjust PARAMS ((void));
1066
1067 #ifdef TREE_CODE
1068 /* Return the tree node and offset if a given argument corresponds to
1069    a string constant.  */
1070 extern tree string_constant PARAMS ((tree, tree *));
1071
1072 /* Generate code to evaluate EXP and jump to LABEL if the value is zero.  */
1073 extern void jumpifnot PARAMS ((tree, rtx));
1074
1075 /* Generate code to evaluate EXP and jump to LABEL if the value is nonzero.  */
1076 extern void jumpif PARAMS ((tree, rtx));
1077
1078 /* Generate code to evaluate EXP and jump to IF_FALSE_LABEL if
1079    the result is zero, or IF_TRUE_LABEL if the result is one.  */
1080 extern void do_jump PARAMS ((tree, rtx, rtx));
1081 #endif
1082
1083 /* Generate rtl to compare two rtx's, will call emit_cmp_insn.  */
1084 extern rtx compare_from_rtx PARAMS ((rtx, rtx, enum rtx_code, int,
1085                                      enum machine_mode, rtx, unsigned int));
1086 extern void do_compare_rtx_and_jump PARAMS ((rtx, rtx, enum rtx_code, int,
1087                                              enum machine_mode, rtx,
1088                                              unsigned int, rtx, rtx));
1089
1090 /* Generate a tablejump instruction (used for switch statements).  */
1091 extern void do_tablejump PARAMS ((rtx, enum machine_mode, rtx, rtx, rtx));
1092 \f
1093 #ifdef TREE_CODE
1094 /* rtl.h and tree.h were included.  */
1095 /* Return an rtx for the size in bytes of the value of an expr.  */
1096 extern rtx expr_size PARAMS ((tree));
1097
1098 extern rtx lookup_static_chain PARAMS ((tree));
1099
1100 /* Convert a stack slot address ADDR valid in function FNDECL
1101    into an address valid in this function (using a static chain).  */
1102 extern rtx fix_lexical_addr PARAMS ((rtx, tree));
1103
1104 /* Return the address of the trampoline for entering nested fn FUNCTION.  */
1105 extern rtx trampoline_address PARAMS ((tree));
1106
1107 /* Return an rtx that refers to the value returned by a function
1108    in its original home.  This becomes invalid if any more code is emitted.  */
1109 extern rtx hard_function_value PARAMS ((tree, tree, int));
1110
1111 extern rtx prepare_call_address PARAMS ((rtx, tree, rtx *, int));
1112
1113 extern rtx expand_call PARAMS ((tree, rtx, int));
1114
1115 extern rtx expand_shift PARAMS ((enum tree_code, enum machine_mode, rtx, tree,
1116                                  rtx, int));
1117 extern rtx expand_divmod PARAMS ((int, enum tree_code, enum machine_mode, rtx,
1118                                   rtx, rtx, int));
1119 extern void locate_and_pad_parm PARAMS ((enum machine_mode, tree, int, tree,
1120                                          struct args_size *,
1121                                          struct args_size *,
1122                                          struct args_size *,
1123                                          struct args_size *));
1124 extern rtx expand_inline_function PARAMS ((tree, tree, rtx, int, tree, rtx));
1125
1126 /* Return the CODE_LABEL rtx for a LABEL_DECL, creating it if necessary.  */
1127 extern rtx label_rtx PARAMS ((tree));
1128 #endif
1129
1130 /* Indicate how an input argument register was promoted.  */
1131 extern rtx promoted_input_arg PARAMS ((unsigned int, enum machine_mode *,
1132                                        int *));
1133
1134 /* Return an rtx like arg but sans any constant terms.
1135    Returns the original rtx if it has no constant terms.
1136    The constant terms are added and stored via a second arg.  */
1137 extern rtx eliminate_constant_term PARAMS ((rtx, rtx *));
1138
1139 /* Convert arg to a valid memory address for specified machine mode,
1140    by emitting insns to perform arithmetic if nec.  */
1141 extern rtx memory_address PARAMS ((enum machine_mode, rtx));
1142
1143 /* Like `memory_address' but pretent `flag_force_addr' is 0.  */
1144 extern rtx memory_address_noforce PARAMS ((enum machine_mode, rtx));
1145
1146 /* Return a memory reference like MEMREF, but with its mode changed
1147    to MODE and its address changed to ADDR.
1148    (VOIDmode means don't change the mode.
1149    NULL for ADDR means don't change the address.)  */
1150 extern rtx change_address PARAMS ((rtx, enum machine_mode, rtx));
1151
1152 /* Return a memory reference like MEMREF, but which is known to have a
1153    valid address.  */
1154 extern rtx validize_mem PARAMS ((rtx));
1155
1156 #ifdef TREE_CODE
1157 /* Given REF, either a MEM or a REG, and T, either the type of X or
1158    the expression corresponding to REF, set RTX_UNCHANGING_P if
1159    appropriate.  */
1160 extern void maybe_set_unchanging PARAMS ((rtx, tree));
1161
1162 /* Given REF, a MEM, and T, either the type of X or the expression
1163    corresponding to REF, set the memory attributes.  OBJECTP is nonzero
1164    if we are making a new object of this type.  */
1165 extern void set_mem_attributes PARAMS ((rtx, tree, int));
1166 #endif
1167
1168 /* Assemble the static constant template for function entry trampolines.  */
1169 extern rtx assemble_trampoline_template PARAMS ((void));
1170
1171 /* Return 1 if two rtx's are equivalent in structure and elements.  */
1172 extern int rtx_equal_p PARAMS ((rtx, rtx));
1173
1174 /* Given rtx, return new rtx whose address won't be affected by
1175    any side effects.  It has been copied to a new temporary reg.  */
1176 extern rtx stabilize PARAMS ((rtx));
1177
1178 /* Given an rtx, copy all regs it refers to into new temps
1179    and return a modified copy that refers to the new temps.  */
1180 extern rtx copy_all_regs PARAMS ((rtx));
1181
1182 /* Copy given rtx to a new temp reg and return that.  */
1183 extern rtx copy_to_reg PARAMS ((rtx));
1184
1185 /* Like copy_to_reg but always make the reg Pmode.  */
1186 extern rtx copy_addr_to_reg PARAMS ((rtx));
1187
1188 /* Like copy_to_reg but always make the reg the specified mode MODE.  */
1189 extern rtx copy_to_mode_reg PARAMS ((enum machine_mode, rtx));
1190
1191 /* Copy given rtx to given temp reg and return that.  */
1192 extern rtx copy_to_suggested_reg PARAMS ((rtx, rtx, enum machine_mode));
1193
1194 /* Copy a value to a register if it isn't already a register.
1195    Args are mode (in case value is a constant) and the value.  */
1196 extern rtx force_reg PARAMS ((enum machine_mode, rtx));
1197
1198 /* Return given rtx, copied into a new temp reg if it was in memory.  */
1199 extern rtx force_not_mem PARAMS ((rtx));
1200
1201 #ifdef TREE_CODE
1202 /* Return mode and signedness to use when object is promoted.  */
1203 extern enum machine_mode promote_mode PARAMS ((tree, enum machine_mode,
1204                                                int *, int));
1205 #endif
1206
1207 /* Remove some bytes from the stack.  An rtx says how many.  */
1208 extern void adjust_stack PARAMS ((rtx));
1209
1210 /* Add some bytes to the stack.  An rtx says how many.  */
1211 extern void anti_adjust_stack PARAMS ((rtx));
1212
1213 /* This enum is used for the following two functions.  */
1214 enum save_level {SAVE_BLOCK, SAVE_FUNCTION, SAVE_NONLOCAL};
1215
1216 /* Save the stack pointer at the specified level.  */
1217 extern void emit_stack_save PARAMS ((enum save_level, rtx *, rtx));
1218
1219 /* Restore the stack pointer from a save area of the specified level.  */
1220 extern void emit_stack_restore PARAMS ((enum save_level, rtx, rtx));
1221
1222 /* Allocate some space on the stack dynamically and return its address.  An rtx
1223    says how many bytes.  */
1224 extern rtx allocate_dynamic_stack_space PARAMS ((rtx, rtx, int));
1225
1226 /* Probe a range of stack addresses from FIRST to FIRST+SIZE, inclusive.
1227    FIRST is a constant and size is a Pmode RTX.  These are offsets from the
1228    current stack pointer.  STACK_GROWS_DOWNWARD says whether to add or
1229    subtract from the stack.  If SIZE is constant, this is done
1230    with a fixed number of probes.  Otherwise, we must make a loop.  */
1231 extern void probe_stack_range PARAMS ((HOST_WIDE_INT, rtx));
1232
1233 /* Return an rtx that refers to the value returned by a library call
1234    in its original home.  This becomes invalid if any more code is emitted.  */
1235 extern rtx hard_libcall_value PARAMS ((enum machine_mode));
1236
1237 /* Given an rtx, return an rtx for a value rounded up to a multiple
1238    of STACK_BOUNDARY / BITS_PER_UNIT.  */
1239 extern rtx round_push PARAMS ((rtx));
1240
1241 extern rtx store_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1242                                     unsigned HOST_WIDE_INT,
1243                                     enum machine_mode, rtx,
1244                                     unsigned int, HOST_WIDE_INT));
1245 extern rtx extract_bit_field PARAMS ((rtx, unsigned HOST_WIDE_INT,
1246                                       unsigned HOST_WIDE_INT, int, rtx,
1247                                       enum machine_mode, enum machine_mode,
1248                                       unsigned int, HOST_WIDE_INT));
1249 extern rtx expand_mult PARAMS ((enum machine_mode, rtx, rtx, rtx, int));
1250 extern rtx expand_mult_add PARAMS ((rtx, rtx, rtx, rtx,enum machine_mode, int));
1251 extern rtx expand_mult_highpart_adjust PARAMS ((enum machine_mode, rtx, rtx, rtx, rtx, int));
1252
1253 extern rtx assemble_static_space PARAMS ((int));
1254
1255 /* Hook called by expand_expr for language-specific tree codes.
1256    It is up to the language front end to install a hook
1257    if it has any such codes that expand_expr needs to know about.  */
1258 extern rtx (*lang_expand_expr) PARAMS ((union tree_node *, rtx,
1259                                         enum machine_mode,
1260                                         enum expand_modifier modifier));
1261
1262 #ifdef TREE_CODE
1263 /* Hook called by output_constant for language-specific tree codes.
1264    It is up to the language front-end to install a hook if it has any
1265    such codes that output_constant needs to know about.  Returns a
1266    language-independent constant equivalent to its input.  */
1267 extern tree (*lang_expand_constant) PARAMS ((tree));
1268
1269 extern int safe_from_p PARAMS ((rtx, tree, int));
1270
1271 /* Hook called by safe_from_p for language-specific tree codes.  It is
1272    up to the language front-end to install a hook if it has any such
1273    codes that safe_from_p needs to know about.  Since same_from_p will
1274    recursively explore the TREE_OPERANDs of an expression, this hook
1275    should not reexamine those pieces.  This routine may recursively
1276    call safe_from_p; it should always pass `0' as the TOP_P
1277    parameter.  */
1278 extern int (*lang_safe_from_p) PARAMS ((rtx, tree));
1279 #endif
1280
1281 extern void init_all_optabs                     PARAMS ((void));
1282 extern void do_jump_by_parts_equality_rtx       PARAMS ((rtx, rtx, rtx));
1283 extern void do_jump_by_parts_greater_rtx        PARAMS ((enum machine_mode,
1284                                                          int, rtx, rtx, rtx,
1285                                                          rtx));
1286
1287 #ifdef TREE_CODE   /* Don't lose if tree.h not included.  */
1288 extern void mark_seen_cases                     PARAMS ((tree, unsigned char *,
1289                                                          HOST_WIDE_INT, int));
1290 #endif