gcc/function.h

   1 /* Structure for saving state for a nested function.
   2    Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_FUNCTION_H
  22 #define GCC_FUNCTION_H
  23 #include "tree.h"
  24 #include "hashtab.h"
  25
  26 struct var_refs_queue GTY(())
  27 {
  28   rtx modified;
  29   enum machine_mode promoted_mode;
  30   int unsignedp;
  31   struct var_refs_queue *next;
  32 };
  33
  34 /* Stack of pending (incomplete) sequences saved by `start_sequence'.
  35    Each element describes one pending sequence.
  36    The main insn-chain is saved in the last element of the chain,
  37    unless the chain is empty.  */
  38
  39 struct sequence_stack GTY(())
  40 {
  41   /* First and last insns in the chain of the saved sequence.  */
  42   rtx first;
  43   rtx last;
  44   struct sequence_stack *next;
  45 };
  46
  47 /* Stack of single obstacks.  */
  48
  49 struct simple_obstack_stack
  50 {
  51   struct obstack *obstack;
  52   struct simple_obstack_stack *next;
  53 };
  54 \f
  55 struct emit_status GTY(())
  56 {
  57   /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
  58      After rtl generation, it is 1 plus the largest register number used.  */
  59   int x_reg_rtx_no;
  60
  61   /* Lowest label number in current function.  */
  62   int x_first_label_num;
  63
  64   /* The ends of the doubly-linked chain of rtl for the current function.
  65      Both are reset to null at the start of rtl generation for the function.
  66
  67      start_sequence saves both of these on `sequence_stack' and then starts
  68      a new, nested sequence of insns.  */
  69   rtx x_first_insn;
  70   rtx x_last_insn;
  71
  72   /* Stack of pending (incomplete) sequences saved by `start_sequence'.
  73      Each element describes one pending sequence.
  74      The main insn-chain is saved in the last element of the chain,
  75      unless the chain is empty.  */
  76   struct sequence_stack *sequence_stack;
  77
  78   /* INSN_UID for next insn emitted.
  79      Reset to 1 for each function compiled.  */
  80   int x_cur_insn_uid;
  81
  82   /* Location the last line-number NOTE emitted.
  83      This is used to avoid generating duplicates.  */
  84   location_t x_last_location;
  85
  86   /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx
  87      vectors.  Since these vectors are needed during the expansion phase when
  88      the total number of registers in the function is not yet known, the
  89      vectors are copied and made bigger when necessary.  */
  90   int regno_pointer_align_length;
  91
  92   /* Indexed by pseudo register number, if nonzero gives the known alignment
  93      for that pseudo (if REG_POINTER is set in x_regno_reg_rtx).
  94      Allocated in parallel with x_regno_reg_rtx.  */
  95   unsigned char * GTY ((length ("%h.x_reg_rtx_no")))
  96     regno_pointer_align;
  97
  98   /* Indexed by pseudo register number, gives the rtx for that pseudo.
  99      Allocated in parallel with regno_pointer_align.  */
 100   rtx * GTY ((length ("%h.x_reg_rtx_no"))) x_regno_reg_rtx;
 101 };
 102
 103 /* For backward compatibility... eventually these should all go away.  */
 104 #define reg_rtx_no (cfun->emit->x_reg_rtx_no)
 105 #define regno_reg_rtx (cfun->emit->x_regno_reg_rtx)
 106 #define seq_stack (cfun->emit->sequence_stack)
 107
 108 #define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO])
 109
 110 struct expr_status GTY(())
 111 {
 112   /* Number of units that we should eventually pop off the stack.
 113      These are the arguments to function calls that have already returned.  */
 114   int x_pending_stack_adjust;
 115
 116   /* Under some ABIs, it is the caller's responsibility to pop arguments
 117      pushed for function calls.  A naive implementation would simply pop
 118      the arguments immediately after each call.  However, if several
 119      function calls are made in a row, it is typically cheaper to pop
 120      all the arguments after all of the calls are complete since a
 121      single pop instruction can be used.  Therefore, GCC attempts to
 122      defer popping the arguments until absolutely necessary.  (For
 123      example, at the end of a conditional, the arguments must be popped,
 124      since code outside the conditional won't know whether or not the
 125      arguments need to be popped.)
 126
 127      When INHIBIT_DEFER_POP is nonzero, however, the compiler does not
 128      attempt to defer pops.  Instead, the stack is popped immediately
 129      after each call.  Rather then setting this variable directly, use
 130      NO_DEFER_POP and OK_DEFER_POP.  */
 131   int x_inhibit_defer_pop;
 132
 133   /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack
 134      boundary can be momentarily unaligned while pushing the arguments.
 135      Record the delta since last aligned boundary here in order to get
 136      stack alignment in the nested function calls working right.  */
 137   int x_stack_pointer_delta;
 138
 139   /* Nonzero means __builtin_saveregs has already been done in this function.
 140      The value is the pseudoreg containing the value __builtin_saveregs
 141      returned.  */
 142   rtx x_saveregs_value;
 143
 144   /* Similarly for __builtin_apply_args.  */
 145   rtx x_apply_args_value;
 146
 147   /* List of labels that must never be deleted.  */
 148   rtx x_forced_labels;
 149 };
 150
 151 #define pending_stack_adjust (cfun->expr->x_pending_stack_adjust)
 152 #define inhibit_defer_pop (cfun->expr->x_inhibit_defer_pop)
 153 #define saveregs_value (cfun->expr->x_saveregs_value)
 154 #define apply_args_value (cfun->expr->x_apply_args_value)
 155 #define forced_labels (cfun->expr->x_forced_labels)
 156 #define stack_pointer_delta (cfun->expr->x_stack_pointer_delta)
 157
 158 struct gimple_df;
 159 struct temp_slot;
 160 typedef struct temp_slot *temp_slot_p;
 161
 162 DEF_VEC_P(temp_slot_p);
 163 DEF_VEC_ALLOC_P(temp_slot_p,gc);
 164
 165 enum function_frequency {
 166   /* This function most likely won't be executed at all.
 167      (set only when profile feedback is available or via function attribute). */
 168   FUNCTION_FREQUENCY_UNLIKELY_EXECUTED,
 169   /* The default value.  */
 170   FUNCTION_FREQUENCY_NORMAL,
 171   /* Optimize this function hard
 172      (set only when profile feedback is available or via function attribute). */
 173   FUNCTION_FREQUENCY_HOT
 174 };
 175
 176 /* This structure can save all the important global and static variables
 177    describing the status of the current function.  */
 178
 179 struct function GTY(())
 180 {
 181   struct eh_status *eh;
 182   struct expr_status *expr;
 183   struct emit_status *emit;
 184   struct varasm_status *varasm;
 185
 186   /* The control flow graph for this function.  */
 187   struct control_flow_graph *cfg;
 188   /* SSA and dataflow information.  */
 189   struct gimple_df *gimple_df;
 190
 191   /* The loops in this function.  */
 192   struct loops *x_current_loops;
 193
 194   /* Value histograms attached to particular statements.  */
 195   htab_t GTY((skip)) value_histograms;
 196
 197   /* For function.c.  */
 198
 199   /* Points to the FUNCTION_DECL of this function.  */
 200   tree decl;
 201
 202   /* Function containing this function, if any.  */
 203   struct function *outer;
 204
 205   /* Number of bytes of args popped by function being compiled on its return.
 206      Zero if no bytes are to be popped.
 207      May affect compilation of return insn or of function epilogue.  */
 208   int pops_args;
 209
 210   /* If function's args have a fixed size, this is that size, in bytes.
 211      Otherwise, it is -1.
 212      May affect compilation of return insn or of function epilogue.  */
 213   int args_size;
 214
 215   /* # bytes the prologue should push and pretend that the caller pushed them.
 216      The prologue must do this, but only if parms can be passed in
 217      registers.  */
 218   int pretend_args_size;
 219
 220   /* # of bytes of outgoing arguments.  If ACCUMULATE_OUTGOING_ARGS is
 221      defined, the needed space is pushed by the prologue.  */
 222   int outgoing_args_size;
 223
 224   /* This is the offset from the arg pointer to the place where the first
 225      anonymous arg can be found, if there is one.  */
 226   rtx arg_offset_rtx;
 227
 228   /* Quantities of various kinds of registers
 229      used for the current function's args.  */
 230   CUMULATIVE_ARGS args_info;
 231
 232   /* If nonzero, an RTL expression for the location at which the current
 233      function returns its result.  If the current function returns its
 234      result in a register, current_function_return_rtx will always be
 235      the hard register containing the result.  */
 236   rtx return_rtx;
 237
 238   /* The arg pointer hard register, or the pseudo into which it was copied.  */
 239   rtx internal_arg_pointer;
 240
 241   /* Opaque pointer used by get_hard_reg_initial_val and
 242      has_hard_reg_initial_val (see integrate.[hc]).  */
 243   struct initial_value_struct *hard_reg_initial_vals;
 244
 245   /* List (chain of EXPR_LIST) of labels heading the current handlers for
 246      nonlocal gotos.  */
 247   rtx x_nonlocal_goto_handler_labels;
 248
 249   /* Label that will go on function epilogue.
 250      Jumping to this label serves as a "return" instruction
 251      on machines which require execution of the epilogue on all returns.  */
 252   rtx x_return_label;
 253
 254   /* Label that will go on the end of function epilogue.
 255      Jumping to this label serves as a "naked return" instruction
 256      on machines which require execution of the epilogue on all returns.  */
 257   rtx x_naked_return_label;
 258
 259   /* List (chain of EXPR_LISTs) of all stack slots in this function.
 260      Made for the sake of unshare_all_rtl.  */
 261   rtx x_stack_slot_list;
 262
 263   /* Place after which to insert the tail_recursion_label if we need one.  */
 264   rtx x_stack_check_probe_note;
 265
 266   /* Location at which to save the argument pointer if it will need to be
 267      referenced.  There are two cases where this is done: if nonlocal gotos
 268      exist, or if vars stored at an offset from the argument pointer will be
 269      needed by inner routines.  */
 270   rtx x_arg_pointer_save_area;
 271
 272   /* Offset to end of allocated area of stack frame.
 273      If stack grows down, this is the address of the last stack slot allocated.
 274      If stack grows up, this is the address for the next slot.  */
 275   HOST_WIDE_INT x_frame_offset;
 276
 277   /* A PARM_DECL that should contain the static chain for this function.
 278      It will be initialized at the beginning of the function.  */
 279   tree static_chain_decl;
 280
 281   /* An expression that contains the non-local goto save area.  The first
 282      word is the saved frame pointer and the second is the saved stack
 283      pointer.  */
 284   tree nonlocal_goto_save_area;
 285
 286   /* Insn after which register parms and SAVE_EXPRs are born, if nonopt.  */
 287   rtx x_parm_birth_insn;
 288
 289   /* List of all used temporaries allocated, by level.  */
 290   VEC(temp_slot_p,gc) *x_used_temp_slots;
 291
 292   /* List of available temp slots.  */
 293   struct temp_slot *x_avail_temp_slots;
 294
 295   /* This slot is initialized as 0 and is added to
 296      during the nested function.  */
 297   struct var_refs_queue *fixup_var_refs_queue;
 298
 299   /* Current nesting level for temporaries.  */
 300   int x_temp_slot_level;
 301
 302   /* Highest label number in current function.  */
 303   int inl_max_label_num;
 304
 305   /* Function sequence number for profiling, debugging, etc.  */
 306   int funcdef_no;
 307
 308   /* For md files.  */
 309
 310   /* tm.h can use this to store whatever it likes.  */
 311   struct machine_function * GTY ((maybe_undef)) machine;
 312
 313   /* The largest alignment of slot allocated on the stack.  */
 314   unsigned int stack_alignment_needed;
 315
 316   /* Preferred alignment of the end of stack frame.  */
 317   unsigned int preferred_stack_boundary;
 318
 319   /* Language-specific code can use this to store whatever it likes.  */
 320   struct language_function * language;
 321
 322   /* Used types hash table.  */
 323   htab_t GTY ((param_is (union tree_node))) used_types_hash;
 324
 325   /* For reorg.  */
 326
 327   /* If some insns can be deferred to the delay slots of the epilogue, the
 328      delay list for them is recorded here.  */
 329   rtx epilogue_delay_list;
 330
 331   /* Maximal number of entities in the single jumptable.  Used to estimate
 332      final flowgraph size.  */
 333   int max_jumptable_ents;
 334
 335   /* UIDs for LABEL_DECLs.  */
 336   int last_label_uid;
 337
 338   /* Line number of the end of the function.  */
 339   location_t function_end_locus;
 340
 341   /* The variables unexpanded so far.  */
 342   tree unexpanded_var_list;
 343
 344   /* Assembly labels for the hot and cold text sections, to
 345      be used by debugger functions for determining the size of text
 346      sections.  */
 347
 348   const char *hot_section_label;
 349   const char *cold_section_label;
 350   const char *hot_section_end_label;
 351   const char *cold_section_end_label;
 352
 353   /* String to be used for name of cold text sections, via
 354      targetm.asm_out.named_section.  */
 355
 356   const char *unlikely_text_section_name;
 357
 358   /* A variable living at the top of the frame that holds a known value.
 359      Used for detecting stack clobbers.  */
 360   tree stack_protect_guard;
 361
 362   /* Properties used by the pass manager.  */
 363   unsigned int curr_properties;
 364   unsigned int last_verified;
 365
 366   /* Collected bit flags.  */
 367
 368   /* Number of units of general registers that need saving in stdarg
 369      function.  What unit is depends on the backend, either it is number
 370      of bytes, or it can be number of registers.  */
 371   unsigned int va_list_gpr_size : 8;
 372
 373   /* Number of units of floating point registers that need saving in stdarg
 374      function.  */
 375   unsigned int va_list_fpr_size : 8;
 376
 377   /* How commonly executed the function is.  Initialized during branch
 378      probabilities pass.  */
 379   ENUM_BITFIELD (function_frequency) function_frequency : 2;
 380
 381   /* Nonzero if function being compiled needs to be given an address
 382      where the value should be stored.  */
 383   unsigned int returns_struct : 1;
 384
 385   /* Nonzero if function being compiled needs to
 386      return the address of where it has put a structure value.  */
 387   unsigned int returns_pcc_struct : 1;
 388
 389   /* Nonzero if the current function returns a pointer type.  */
 390   unsigned int returns_pointer : 1;
 391
 392   /* Nonzero if function being compiled can call setjmp.  */
 393   unsigned int calls_setjmp : 1;
 394
 395   /* Nonzero if function being compiled can call alloca,
 396      either as a subroutine or builtin.  */
 397   unsigned int calls_alloca : 1;
 398
 399   /* Nonzero if function being compiled called builtin_return_addr or
 400      builtin_frame_address with nonzero count.  */
 401   unsigned int accesses_prior_frames : 1;
 402
 403   /* Nonzero if the function calls __builtin_eh_return.  */
 404   unsigned int calls_eh_return : 1;
 405
 406   /* Nonzero if function being compiled receives nonlocal gotos
 407      from nested functions.  */
 408   unsigned int has_nonlocal_label : 1;
 409
 410   /* Nonzero if function calls builtin_unwind_init.  */
 411   unsigned int calls_unwind_init : 1;
 412
 413   /* Nonzero if function being compiled has nonlocal gotos to parent
 414      function.  */
 415   unsigned int has_nonlocal_goto : 1;
 416
 417   /* Nonzero if function being compiled has an asm statement.  */
 418   unsigned int has_asm_statement : 1;
 419
 420   /* Nonzero if the current function is a thunk, i.e., a lightweight
 421      function implemented by the output_mi_thunk hook) that just
 422      adjusts one of its arguments and forwards to another
 423      function.  */
 424   unsigned int is_thunk : 1;
 425
 426   /* This bit is used by the exception handling logic.  It is set if all
 427      calls (if any) are sibling calls.  Such functions do not have to
 428      have EH tables generated, as they cannot throw.  A call to such a
 429      function, however, should be treated as throwing if any of its callees
 430      can throw.  */
 431   unsigned int all_throwers_are_sibcalls : 1;
 432
 433   /* Nonzero if profiling code should be generated.  */
 434   unsigned int profile : 1;
 435
 436   /* Nonzero if stack limit checking should be enabled in the current
 437      function.  */
 438   unsigned int limit_stack : 1;
 439
 440   /* Nonzero if current function uses stdarg.h or equivalent.  */
 441   unsigned int stdarg : 1;
 442
 443   /* Nonzero if the back-end should not keep track of expressions that
 444      determine the size of variable-sized objects.  Normally, such
 445      expressions are saved away, and then expanded when the next
 446      function is started.  For example, if a parameter has a
 447      variable-sized type, then the size of the parameter is computed
 448      when the function body is entered.  However, some front-ends do
 449      not desire this behavior.  */
 450   unsigned int x_dont_save_pending_sizes_p : 1;
 451
 452   /* Nonzero if the current function uses the constant pool.  */
 453   unsigned int uses_const_pool : 1;
 454
 455   /* Nonzero if the current function uses pic_offset_table_rtx.  */
 456   unsigned int uses_pic_offset_table : 1;
 457
 458   /* Nonzero if the current function needs an lsda for exception handling.  */
 459   unsigned int uses_eh_lsda : 1;
 460
 461   /* Nonzero if code to initialize arg_pointer_save_area has been emitted.  */
 462   unsigned int arg_pointer_save_area_init : 1;
 463
 464   unsigned int after_inlining : 1;
 465
 466   /* Set when the call to function itself has been emit.  */
 467   unsigned int recursive_call_emit : 1;
 468
 469   /* Set when the tail call has been produced.  */
 470   unsigned int tail_call_emit : 1;
 471
 472   /* FIXME tuples: This bit is temporarily here to mark when a
 473      function has been gimplified, so we can make sure we're not
 474      creating non GIMPLE tuples after gimplification.  */
 475   unsigned gimplified : 1;
 476 };
 477
 478 /* If va_list_[gf]pr_size is set to this, it means we don't know how
 479    many units need to be saved.  */
 480 #define VA_LIST_MAX_GPR_SIZE    255
 481 #define VA_LIST_MAX_FPR_SIZE    255
 482
 483 /* The function currently being compiled.  */
 484 extern GTY(()) struct function *cfun;
 485
 486 /* Pointer to chain of `struct function' for containing functions.  */
 487 extern GTY(()) struct function *outer_function_chain;
 488
 489 /* Nonzero if we've already converted virtual regs to hard regs.  */
 490 extern int virtuals_instantiated;
 491
 492 /* Nonzero if at least one trampoline has been created.  */
 493 extern int trampolines_created;
 494
 495 /* For backward compatibility... eventually these should all go away.  */
 496 #define current_function_pops_args (cfun->pops_args)
 497 #define current_function_returns_struct (cfun->returns_struct)
 498 #define current_function_returns_pcc_struct (cfun->returns_pcc_struct)
 499 #define current_function_returns_pointer (cfun->returns_pointer)
 500 #define current_function_calls_setjmp (cfun->calls_setjmp)
 501 #define current_function_calls_alloca (cfun->calls_alloca)
 502 #define current_function_accesses_prior_frames (cfun->accesses_prior_frames)
 503 #define current_function_calls_eh_return (cfun->calls_eh_return)
 504 #define current_function_is_thunk (cfun->is_thunk)
 505 #define current_function_args_info (cfun->args_info)
 506 #define current_function_args_size (cfun->args_size)
 507 #define current_function_pretend_args_size (cfun->pretend_args_size)
 508 #define current_function_outgoing_args_size (cfun->outgoing_args_size)
 509 #define current_function_arg_offset_rtx (cfun->arg_offset_rtx)
 510 #define current_function_stdarg (cfun->stdarg)
 511 #define current_function_internal_arg_pointer (cfun->internal_arg_pointer)
 512 #define current_function_return_rtx (cfun->return_rtx)
 513 #define current_function_profile (cfun->profile)
 514 #define current_function_funcdef_no (cfun->funcdef_no)
 515 #define current_function_limit_stack (cfun->limit_stack)
 516 #define current_function_uses_pic_offset_table (cfun->uses_pic_offset_table)
 517 #define current_function_uses_const_pool (cfun->uses_const_pool)
 518 #define current_function_epilogue_delay_list (cfun->epilogue_delay_list)
 519 #define current_function_has_nonlocal_label (cfun->has_nonlocal_label)
 520 #define current_function_calls_unwind_init (cfun->calls_unwind_init)
 521 #define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
 522 #define current_function_has_asm_statement (cfun->has_asm_statement)
 523
 524 #define return_label (cfun->x_return_label)
 525 #define naked_return_label (cfun->x_naked_return_label)
 526 #define stack_slot_list (cfun->x_stack_slot_list)
 527 #define parm_birth_insn (cfun->x_parm_birth_insn)
 528 #define frame_offset (cfun->x_frame_offset)
 529 #define stack_check_probe_note (cfun->x_stack_check_probe_note)
 530 #define arg_pointer_save_area (cfun->x_arg_pointer_save_area)
 531 #define used_temp_slots (cfun->x_used_temp_slots)
 532 #define avail_temp_slots (cfun->x_avail_temp_slots)
 533 #define temp_slot_level (cfun->x_temp_slot_level)
 534 #define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels)
 535 #define rtl_df (cfun->df)
 536 #define current_loops (cfun->x_current_loops)
 537 #define dom_computed (cfun->cfg->x_dom_computed)
 538 #define n_bbs_in_dom_tree (cfun->cfg->x_n_bbs_in_dom_tree)
 539 #define VALUE_HISTOGRAMS(fun) (fun)->value_histograms
 540
 541 /* Given a function decl for a containing function,
 542    return the `struct function' for it.  */
 543 struct function *find_function_data (tree);
 544
 545 /* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
 546    and create duplicate blocks.  */
 547 extern void reorder_blocks (void);
 548
 549 /* Set BLOCK_NUMBER for all the blocks in FN.  */
 550 extern void number_blocks (tree);
 551
 552 extern void clear_block_marks (tree);
 553 extern tree blocks_nreverse (tree);
 554
 555 /* Return size needed for stack frame based on slots so far allocated.
 556    This size counts from zero.  It is not rounded to STACK_BOUNDARY;
 557    the caller may have to do that.  */
 558 extern HOST_WIDE_INT get_frame_size (void);
 559
 560 /* Issue an error message and return TRUE if frame OFFSET overflows in
 561    the signed target pointer arithmetics for function FUNC.  Otherwise
 562    return FALSE.  */
 563 extern bool frame_offset_overflow (HOST_WIDE_INT, tree);
 564
 565 /* A pointer to a function to create target specific, per-function
 566    data structures.  */
 567 extern struct machine_function * (*init_machine_status) (void);
 568
 569 /* Save and restore status information for a nested function.  */
 570 extern void free_after_parsing (struct function *);
 571 extern void free_after_compilation (struct function *);
 572
 573 extern void init_varasm_status (struct function *);
 574
 575 #ifdef RTX_CODE
 576 extern void diddle_return_value (void (*)(rtx, void*), void*);
 577 extern void clobber_return_register (void);
 578 #endif
 579
 580 extern rtx get_arg_pointer_save_area (struct function *);
 581
 582 /* Returns the name of the current function.  */
 583 extern const char *current_function_name (void);
 584 /* Returns the assembler name (raw, mangled) of the current function.  */
 585 extern const char *current_function_assembler_name (void);
 586
 587 extern void do_warn_unused_parameter (tree);
 588
 589 extern bool pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode,
 590                                tree, bool);
 591 extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode,
 592                                      tree, bool);
 593
 594 extern void used_types_insert (tree);
 595
 596 extern int get_next_funcdef_no (void);
 597 #endif  /* GCC_FUNCTION_H */