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/* Structure for saving state for a nested function.
   Copyright (C) 1989, 1992 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef NULL_TREE
#define tree int *
#ifndef GET_CODE
#define rtx int *

struct var_refs_queue
    rtx modified;
    enum machine_mode promoted_mode;
    int unsignedp;
    struct var_refs_queue *next;

/* Stack of pending (incomplete) sequences saved by `start_sequence'.
   Each element describes one pending sequence.
   The main insn-chain is saved in the last element of the chain,
   unless the chain is empty.  */

struct sequence_stack
  /* First and last insns in the chain of the saved sequence.  */
  rtx first, last;
  struct sequence_stack *next;

extern struct sequence_stack *sequence_stack;
/* This structure can save all the important global and static variables
   describing the status of the current function.  */

struct function
  struct function *next;

  /* For function.c.  */
  char *name;
  tree decl;
  int pops_args;
  int returns_struct;
  int returns_pcc_struct;
  int needs_context;
  int calls_setjmp;
  int calls_longjmp;
  int calls_alloca;
  int has_nonlocal_label;
  rtx nonlocal_goto_handler_slot;
  rtx nonlocal_goto_stack_level;
  tree nonlocal_labels;
  int args_size;
  int pretend_args_size;
  rtx arg_offset_rtx;
  int max_parm_reg;
  rtx *parm_reg_stack_loc;
  int outgoing_args_size;
  rtx return_rtx;
  rtx cleanup_label;
  rtx return_label;
  rtx save_expr_regs;
  rtx stack_slot_list;
  rtx parm_birth_insn;
  int frame_offset;
  rtx tail_recursion_label;
  rtx tail_recursion_reentry;
  rtx internal_arg_pointer;
  rtx arg_pointer_save_area;
  tree rtl_expr_chain;
  rtx last_parm_insn;
  tree context_display;
  tree trampoline_list;
  int function_call_count;
  struct temp_slot *temp_slots;
  int temp_slot_level;
  /* This slot is initialized as 0 and is added to
     during the nested function.  */
  struct var_refs_queue *fixup_var_refs_queue;

  /* For stmt.c  */
  struct nesting *block_stack;
  struct nesting *stack_block_stack;
  struct nesting *cond_stack;
  struct nesting *loop_stack;
  struct nesting *case_stack;
  struct nesting *nesting_stack;
  int nesting_depth;
  int block_start_count;
  tree last_expr_type;
  rtx last_expr_value;
  int expr_stmts_for_value;
  char *emit_filename;
  int emit_lineno;
  struct goto_fixup *goto_fixup_chain;

  /* For expr.c.  */
  int pending_stack_adjust;
  int inhibit_defer_pop;
  tree cleanups_this_call;
  rtx saveregs_value;
  rtx forced_labels;

  /* For emit-rtl.c.  */
  int reg_rtx_no;
  int first_label_num;
  rtx first_insn;
  rtx last_insn;
  struct sequence_stack *sequence_stack;
  int cur_insn_uid;
  int last_linenum;
  char *last_filename;
  char *regno_pointer_flag;
  int regno_pointer_flag_length;
  rtx *regno_reg_rtx;

  /* For stor-layout.c.  */
  tree permanent_type_chain;
  tree temporary_type_chain;
  tree permanent_type_end;
  tree temporary_type_end;
  tree pending_sizes;
  int immediate_size_expand;

  /* For tree.c.  */
  int all_types_permanent;
  struct momentary_level *momentary_stack;
  char *maybepermanent_firstobj;
  char *temporary_firstobj;
  char *momentary_firstobj;
  struct obstack *current_obstack;
  struct obstack *function_obstack;
  struct obstack *function_maybepermanent_obstack;
  struct obstack *expression_obstack;
  struct obstack *saveable_obstack;
  struct obstack *rtl_obstack;

  /* For integrate.c.  */
  int uses_const_pool;

  /* For md files.  */
  int uses_pic_offset_table;

  /* For reorg.  */
  rtx epilogue_delay_list;

  /* For varasm.  */
  struct constant_descriptor **const_rtx_hash_table;
  struct pool_sym **const_rtx_sym_hash_table;
  struct pool_constant *first_pool, *last_pool;
  int pool_offset;

/* The FUNCTION_DECL for an inline function currently being expanded.  */
extern tree inline_function_decl;

/* Label that will go on function epilogue.
   Jumping to this label serves as a "return" instruction
   on machines which require execution of the epilogue on all returns.  */
extern rtx return_label;

/* List (chain of EXPR_LISTs) of all stack slots in this function.
   Made for the sake of unshare_all_rtl.  */
extern rtx stack_slot_list;

/* Given a function decl for a containing function,
   return the `struct function' for it.  */
struct function *find_function_data ();

/* Pointer to chain of `struct function' for containing functions.  */
extern struct function *outer_function_chain;

/* Put all this function's BLOCK nodes into a vector and return it.
   Also store in each NOTE for the beginning or end of a block
   the index of that block in the vector.  */
tree *identify_blocks ();

#ifdef rtx
#undef rtx

#ifdef tree
#undef tree