/* Structure for saving state for a nested function.   Copyright (C) 1989, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.This file is part of GNU CC.GNU CC is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe 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 ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See theGNU General Public License for more details.You should have received a copy of the GNU General Public Licensealong with GNU CC; see the file COPYING.  If not, write tothe Free Software Foundation, 59 Temple Place - Suite 330,Boston, MA 02111-1307, USA.  */#ifndef NULL_TREE#define tree int *#endif#ifndef GET_CODE#define rtx int *#endifstruct 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;  tree sequence_rtl_expr;  struct sequence_stack *next;};extern struct sequence_stack *sequence_stack;/* Stack of single obstacks.  */struct simple_obstack_stack{  struct obstack *obstack;  struct simple_obstack_stack *next;};/* 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 returns_pointer;  int needs_context;  int calls_setjmp;  int calls_longjmp;  int calls_alloca;  int has_nonlocal_label;  int has_nonlocal_goto;  int contains_functions;  int is_thunk;  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 varargs;  int stdarg;  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;  HOST_WIDE_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;  CUMULATIVE_ARGS args_info;  /* 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 exception handling information.  */  struct eh_stack ehstack;  struct eh_queue ehqueue;  rtx catch_clauses;  struct label_node *false_label_stack;  struct label_node *caught_return_label_stack;  tree protect_list;  rtx dhc;  rtx dcc;  /* For expr.c.  */  int pending_stack_adjust;  int inhibit_defer_pop;  rtx saveregs_value;  rtx apply_args_value;  rtx forced_labels;  /* For emit-rtl.c.  */  int reg_rtx_no;  int first_label_num;  rtx first_insn;  rtx last_insn;  tree sequence_rtl_expr;  struct sequence_stack *sequence_stack;  int cur_insn_uid;  int last_linenum;  char *last_filename;  char *regno_pointer_flag;  char *regno_pointer_align;  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;  char *momentary_function_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;  struct simple_obstack_stack *inline_obstacks;  /* For integrate.c.  */  int uses_const_pool;  /* For md files.  */  int uses_pic_offset_table;  /* tm.h can use this to store whatever it likes.  */  struct machine_function *machine;  /* 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;  rtx const_double_chain;};/* 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 PROTO((tree));/* 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.  */extern tree *identify_blocks PROTO((tree, rtx));/* Return size needed for stack frame based on slots so far allocated.   This size counts from zero.  It is not rounded to STACK_BOUNDARY;   the caller may have to do that.  */extern HOST_WIDE_INT get_frame_size PROTO((void));/* These variables hold pointers to functions to   save and restore machine-specific data,   in push_function_context and pop_function_context.  */extern void (*save_machine_status) PROTO((struct function *));extern void (*restore_machine_status) PROTO((struct function *));/* Save and restore status information for a nested function.  */extern void save_tree_status		PROTO((struct function *, tree));extern void restore_tree_status		PROTO((struct function *, tree));extern void save_varasm_status		PROTO((struct function *, tree));extern void restore_varasm_status	PROTO((struct function *));extern void save_eh_status		PROTO((struct function *));extern void restore_eh_status		PROTO((struct function *));extern void save_stmt_status		PROTO((struct function *));extern void restore_stmt_status		PROTO((struct function *));extern void save_expr_status		PROTO((struct function *));extern void restore_expr_status		PROTO((struct function *));extern void save_emit_status		PROTO((struct function *));extern void restore_emit_status		PROTO((struct function *));extern void save_storage_status		PROTO((struct function *));extern void restore_storage_status	PROTO((struct function *));#ifdef rtx#undef rtx#endif#ifdef tree#undef tree#endif