-#define ehstack (current_function->eh->x_ehstack)
-#define catchstack (current_function->eh->x_catchstack)
-#define ehqueue (current_function->eh->x_ehqueue)
-#define catch_clauses (current_function->eh->x_catch_clauses)
-#define false_label_stack (current_function->eh->x_false_label_stack)
-#define caught_return_label_stack (current_function->eh->x_caught_return_label_stack)
-#define protect_list (current_function->eh->x_protect_list)
-#define current_function_ehc (current_function->eh->ehc)
-#define eh_return_stub_label (current_function->eh->x_eh_return_stub_label)
-
-#ifdef TREE_CODE
-/* Start an exception handling region. All instructions emitted after
- this point are considered to be part of the region until
- expand_eh_region_end () is invoked. */
-
-extern void expand_eh_region_start PROTO((void));
-
-/* Just like expand_eh_region_start, except if a cleanup action is
- entered on the cleanup chain, the TREE_PURPOSE of the element put
- on the chain is DECL. DECL should be the associated VAR_DECL, if
- any, otherwise it should be NULL_TREE. */
-
-extern void expand_eh_region_start_for_decl PROTO((tree));
-
-/* Start an exception handling region for the given cleanup action.
- All instructions emitted after this point are considered to be part
- of the region until expand_eh_region_end () is invoked. CLEANUP is
- the cleanup action to perform. The return value is true if the
- exception region was optimized away. If that case,
- expand_eh_region_end does not need to be called for this cleanup,
- nor should it be.
-
- This routine notices one particular common case in C++ code
- generation, and optimizes it so as to not need the exception
- region. */
-
-extern int expand_eh_region_start_tree PROTO((tree, tree));
-
-/* End an exception handling region. The information about the region
- is found on the top of ehstack.
-
- HANDLER is either the cleanup for the exception region, or if we're
- marking the end of a try block, HANDLER is integer_zero_node.
-
- HANDLER will be transformed to rtl when expand_leftover_cleanups ()
- is invoked. */
-
-extern void expand_eh_region_end PROTO((tree));
-
-/* Push RLABEL or TLABEL onto LABELSTACK. Only one of RLABEL or TLABEL
- should be set; the other must be NULL. */
-
-extern void push_label_entry PROTO((struct label_node **labelstack, rtx rlabel, tree tlabel));
-
-/* Pop the topmost entry from LABELSTACK and return its value as an
- rtx node. If LABELSTACK is empty, return NULL. */
-
-extern rtx pop_label_entry PROTO((struct label_node **labelstack));
-
-/* Return the topmost entry of LABELSTACK as a tree node, or return
- NULL_TREE if LABELSTACK is empty. */
-
-extern tree top_label_entry PROTO((struct label_node **labelstack));
-
-#endif
-
-/* Test: is exception handling turned on? */
-
-extern int doing_eh PROTO ((int));
-
-/* Toplevel initialization for EH. */
-
-void set_exception_lang_code PROTO((int));
-void set_exception_version_code PROTO((int));
-
-/* A list of handlers asocciated with an exception region. HANDLER_LABEL
- is the the label that control should be transfered to if the data
- in TYPE_INFO matches an exception. a value of NULL_TREE for TYPE_INFO
- means This is a cleanup, and must always be called. A value of
- CATCH_ALL_TYPE works like a cleanup, but a call to the runtime matcher
- is still performed to avoid being caught by a different language
- exception. NEXT is a pointer to the next handler for this region.
- NULL means there are no more. */
-
-typedef struct handler_info
-{
- rtx handler_label;
- int handler_number;
- void *type_info;
- struct handler_info *next;
-} handler_info;
-
-
-/* Add new handler information to an exception range. The first parameter
- specifies the range number (returned from new_eh_entry()). The second
- parameter specifies the handler. By default the handler is inserted at
- the end of the list. A handler list may contain only ONE NULL_TREE
- typeinfo entry. Regardless where it is positioned, a NULL_TREE entry
- is always output as the LAST handler in the exception table for a region. */
-
-void add_new_handler PROTO((int, struct handler_info *));
-
-/* Remove a handler label. The handler label is being deleted, so all
- regions which reference this handler should have it removed from their
- list of possible handlers. Any region which has the final handler
- removed can be deleted. */
-
-void remove_handler PROTO((rtx));
-
-/* Create a new handler structure initialized with the handler label and
- typeinfo fields passed in. */
-
-struct handler_info *get_new_handler PROTO((rtx, void *));
-
-/* Make a duplicate of an exception region by copying all the handlers
- for an exception region. Return the new handler index. */
-
-int duplicate_eh_handlers PROTO((int, int, rtx (*)(rtx)));
-
-/* map symbol refs for rethrow */
-
-rtx rethrow_symbol_map PROTO((rtx, rtx (*)(rtx)));
-
-/* Is the rethrow label for a region used? */
-
-int rethrow_used PROTO((int));
-
-/* Update the rethrow references to reflect rethrows which have been
- optimized away. */
-
-void update_rethrow_references PROTO((void));
-
-/* Return the region number a this is the rethrow label for. */
-
-int eh_region_from_symbol PROTO((rtx));
-
-/* Get a pointer to the first handler in an exception region's list. */
-
-struct handler_info *get_first_handler PROTO((int));
-
-/* Find all the runtime handlers type matches currently referenced */
-
-int find_all_handler_type_matches PROTO((void ***));
-
-/* The eh_nesting_info structure is used to find a list of valid handlers
- for any arbitrary exception region. When init_eh_nesting_info is called,
- the information is all pre-calculated and entered in this structure.
- REGION_INDEX is a vector over all possible region numbers. Since the
- number of regions is typically much smaller than the range of block
- numbers, this is a sparse vector and the other data structures are
- represented as dense vectors. Indexed with an exception region number, this
- returns the index to use in the other data structures to retreive the
- correct information.
- HANDLERS is an array of vectors which point to handler_info structures.
- when indexed, it gives the list of all possible handlers which can
- be reached by a throw from this exception region.
- NUM_HANDLERS is the equivilent array indicating how many handler
- pointers there are in the HANDLERS vector.
- OUTER_INDEX indicates which index represents the information for the
- outer block. 0 indicates there is no outer context.
- REGION_COUNT is the number of regions. */
-
-typedef struct eh_nesting
-{
- int *region_index;
- handler_info ***handlers;
- int *num_handlers;
- int *outer_index;
- int region_count;
-} eh_nesting_info;
-
-/* Initialize the eh_nesting_info structure. */
-
-eh_nesting_info *init_eh_nesting_info PROTO((void));
-
-/* Get a list of handlers reachable from a an exception region/insn. */
-
-int reachable_handlers PROTO((int, eh_nesting_info *, rtx,
- handler_info ***handlers));
-
-/* Free the eh_nesting_info structure. */
-
-void free_eh_nesting_info PROTO((eh_nesting_info *));
-
-extern void init_eh PROTO((void));
-
-/* Initialization for the per-function EH data. */
-
-extern void init_eh_for_function PROTO((void));
-
-/* Generate an exception label. Use instead of gen_label_rtx */
-
-extern rtx gen_exception_label PROTO((void));
-
-/* Adds an EH table entry for EH entry number N. Called from
- final_scan_insn for NOTE_INSN_EH_REGION_BEG. */
-
-extern void add_eh_table_entry PROTO((int n));
-
-/* Start a catch clause, triggered by runtime value paramter. */
-
-#ifdef TREE_CODE
-extern void start_catch_handler PROTO((tree));
-#endif
-
-/* End an individual catch clause. */
-
-extern void end_catch_handler PROTO((void));
-
-/* Returns a non-zero value if we need to output an exception table. */
-
-extern int exception_table_p PROTO((void));
-
-/* Outputs the exception table if we have one. */
-
-extern void output_exception_table PROTO((void));
-
-/* Given a return address in ADDR, determine the address we should use
- to find the corresponding EH region. */
-
-extern rtx eh_outer_context PROTO((rtx addr));
-
-/* Called at the start of a block of try statements for which there is
- a supplied catch handler. */
-
-extern void expand_start_try_stmts PROTO((void));
-
-/* Called at the start of a block of catch statements. It terminates the
- previous set of try statements. */
-
-extern void expand_start_all_catch PROTO((void));
-
-/* Called at the end of a block of catch statements. */
-
-extern void expand_end_all_catch PROTO((void));
-
-#ifdef TREE_CODE
-/* Create a new exception region and add the handler for the region
- onto a list. These regions will be ended (and their handlers
- emitted) when end_protect_partials is invoked. */
-
-extern void add_partial_entry PROTO((tree handler));
-#endif
-
-/* End all of the pending exception regions that have handlers added with
- push_protect_entry (). */
-
-extern void end_protect_partials PROTO((void));
-
-/* An internal throw. */
-
-extern void expand_internal_throw PROTO((void));
-
-/* Called from expand_exception_blocks and expand_end_catch_block to
- expand and pending handlers. */
-
-extern void expand_leftover_cleanups PROTO((void));
-
-/* If necessary, emit insns to get EH context for the current
- function. */
-
-extern void emit_eh_context PROTO((void));
-
-/* Builds a list of handler labels and puts them in the global
- variable exception_handler_labels. */
-
-extern void find_exception_handler_labels PROTO((void));
-
-/* Determine if an arbitrary label is an exception label */
-
-extern int is_exception_handler_label PROTO((int));
-
-/* Performs sanity checking on the check_exception_handler_labels
- list. */
-
-extern void check_exception_handler_labels PROTO((void));
-
-/* Keeps track of the label used as the context of a throw to rethrow an
- exception to the outer exception region. */
-
-extern struct label_node *outer_context_label_stack;
-
-/* A list of labels used for exception handlers. It is created by
- find_exception_handler_labels for the optimization passes. */
-
-extern rtx exception_handler_labels;
-
-/* Performs optimizations for exception handling, such as removing
- unnecessary exception regions. Invoked from jump_optimize (). */
-
-extern void exception_optimize PROTO((void));
-
-/* Return EH context (and set it up once per fn). */
-extern rtx get_eh_context PROTO((void));
-
-/* Get the dynamic handler chain. */
-extern rtx get_dynamic_handler_chain PROTO((void));
-
-/* Get the dynamic cleanup chain. */
-extern rtx get_dynamic_cleanup_chain PROTO((void));
-
-/* Throw an exception. */
-
-extern void emit_throw PROTO((void));
-
-/* One to use setjmp/longjmp method of generating code. */
-
-extern int exceptions_via_longjmp;
-
-/* One to enable asynchronous exception support. */
-
-extern int asynchronous_exceptions;
-
-/* One to protect cleanup actions with a handler that calls
- __terminate, zero otherwise. */
-
-extern int protect_cleanup_actions_with_terminate;
-
-#ifdef TREE_CODE
-extern tree protect_with_terminate PROTO((tree));
-#endif
-
-extern void expand_fixup_region_start PROTO((void));
-#ifdef TREE_CODE
-extern void expand_fixup_region_end PROTO((tree));
-#endif
-
-/* Various hooks for the DWARF 2 __throw routine. */
-
-void expand_builtin_unwind_init PROTO((void));
-rtx expand_builtin_dwarf_fp_regnum PROTO((void));
-#ifdef TREE_CODE
-rtx expand_builtin_frob_return_addr PROTO((tree));
-rtx expand_builtin_extract_return_addr PROTO((tree));
-rtx expand_builtin_dwarf_reg_size PROTO((tree, rtx));
-void expand_builtin_eh_return PROTO((tree, tree, tree));
-#endif
-void expand_eh_return PROTO((void));
-
-
-/* Checking whether 2 instructions are within the same exception region. */
-
-int in_same_eh_region PROTO((rtx, rtx));
-void free_insn_eh_region PROTO((void));
-void init_insn_eh_region PROTO((rtx, int));