251 lines
6.7 KiB
C
251 lines
6.7 KiB
C
/* 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 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. */
|
||
|
||
|
||
#ifndef NULL_TREE
|
||
#define tree int *
|
||
#endif
|
||
#ifndef GET_CODE
|
||
#define rtx int *
|
||
#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;
|
||
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;
|
||
};
|
||
|
||
/* 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) ();
|
||
extern void (*restore_machine_status) ();
|
||
|
||
/* Save and restore varasm.c status for a nested function. */
|
||
extern void save_varasm_status PROTO((struct function *));
|
||
extern void restore_varasm_status PROTO((struct function *));
|
||
|
||
#ifdef rtx
|
||
#undef rtx
|
||
#endif
|
||
|
||
#ifdef tree
|
||
#undef tree
|
||
#endif
|