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/* Structure for saving state for a nested function.
Copyright (C) 1989, 92-97, 1998 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#if !defined(NULL_TREE) && !defined(tree)
typedef union union_node *_function_tree;
#define tree _function_tree
#endif
#if !defined(NULL_RTX) && !defined(rtx)
typedef struct rtx_def *_function_rtx;
#define rtx _function_rtx
#endif
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;
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;
char *cannot_inline;
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;
int target_temp_slot_level;
int var_temp_slot_level;
int instrument_entry_exit;
/* 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_stack catchstack;
struct eh_queue ehqueue;
rtx catch_clauses;
struct label_node *false_label_stack;
struct label_node *caught_return_label_stack;
tree protect_list;
rtx ehc;
/* 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 *));
extern rtx get_first_block_beg PROTO((void));
#ifdef rtx
#undef rtx
#endif
#ifdef tree
#undef tree
#endif
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