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/* Exception Handling interface routines.
Copyright (C) 1996 Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
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 GET_CODE
#define rtx int *
#endif
#ifdef TREE_CODE
struct label_node {
union {
rtx rlabel;
tree tlabel;
} u;
struct label_node *chain;
};
/* A entry for the exception handling stack EHSTACK or the exception
handling queue EHQUEUE. */
struct eh_entry {
rtx start_label;
rtx end_label;
rtx exception_handler_label;
tree finalization;
};
struct eh_node {
struct eh_entry *entry;
struct eh_node *chain;
};
struct eh_stack {
struct eh_node *top;
};
struct eh_queue {
struct eh_node *head;
struct eh_node *tail;
};
extern void push_label_entry PROTO((struct label_node **labelstack, rtx rlabel, tree tlabel));
extern rtx pop_label_entry PROTO((struct label_node **labelstack));
extern tree top_label_entry PROTO((struct label_node **labelstack));
extern struct eh_stack ehstack;
extern struct eh_queue ehqueue;
extern rtx catch_clauses;
extern tree protect_list;
#endif
struct function;
extern void init_eh PROTO((void));
extern void init_eh_for_function PROTO((void));
extern void save_eh_status PROTO((struct function *p));
extern void restore_eh_status PROTO((struct function *p));
extern void add_eh_table_entry PROTO((int));
extern int exception_table_p PROTO((void));
extern void output_exception_table PROTO((void));
extern rtx eh_outer_context PROTO((rtx));
extern void emit_unwinder PROTO((void));
extern void end_eh_unwinder PROTO((void));
extern void find_handler_labels PROTO((void));
extern void check_handler_labels PROTO((void));
extern struct label_node *caught_return_label_stack;
extern struct label_node *false_label_stack;
extern rtx exception_handler_labels;
/* The rtx for the saved PC value. */
extern rtx eh_saved_pc_rtx;
extern void exception_optimize PROTO((void));
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