- 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));
-
-/* A set of insns for the catch clauses in the current function. They
- will be emitted at the end of the current function. */
-
-extern rtx catch_clauses;
-
-#endif
-
-/* Toplevel initialization for EH. */
-
-extern void init_eh PROTO((void));
-
-/* Initialization for the per-function EH data. */
-
-extern void init_eh_for_function 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));
-
-/* 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));
+ this point are considered to be part of the region until an
+ expand_eh_region_end variant is invoked. */
+extern void expand_eh_region_start PARAMS ((void));
+
+/* End an exception handling region for a cleanup. HANDLER is an
+ expression to expand for the cleanup. */
+extern void expand_eh_region_end_cleanup PARAMS ((tree));
+
+/* End an exception handling region for a try block, and prepares
+ for subsequent calls to expand_start_catch. */
+extern void expand_start_all_catch PARAMS ((void));
+
+/* Begin a catch clause. TYPE is an object to be matched by the
+ runtime, or a list of such objects, or null if this is a catch-all
+ clause. */
+extern void expand_start_catch PARAMS ((tree));
+
+/* End a catch clause. Control will resume after the try/catch block. */
+extern void expand_end_catch PARAMS ((void));
+
+/* End a sequence of catch handlers for a try block. */
+extern void expand_end_all_catch PARAMS ((void));
+
+/* End an exception region for an exception type filter. ALLOWED is a
+ TREE_LIST of TREE_VALUE objects to be matched by the runtime.
+ FAILURE is a function to invoke if a mismatch occurs. */
+extern void expand_eh_region_end_allowed PARAMS ((tree, tree));
+
+/* End an exception region for a must-not-throw filter. FAILURE is a
+ function to invoke if an uncaught exception propagates this far. */
+extern void expand_eh_region_end_must_not_throw PARAMS ((tree));
+
+/* End an exception region for a throw. No handling goes on here,
+ but it's the easiest way for the front-end to indicate what type
+ is being thrown. */
+extern void expand_eh_region_end_throw PARAMS ((tree));
+
+/* End a fixup region. Within this region the cleanups for the immediately
+ enclosing region are _not_ run. This is used for goto cleanup to avoid
+ destroying an object twice. */
+extern void expand_eh_region_end_fixup PARAMS ((tree));
+
+/* Invokes CALLBACK for every exception handler label. Only used by old
+ loop hackery; should not be used by new code. */
+extern void for_each_eh_label PARAMS ((void (*) (rtx)));
+
+/* Determine if the given INSN can throw an exception. */
+extern bool can_throw_internal PARAMS ((rtx));
+extern bool can_throw_external PARAMS ((rtx));
+
+/* Return nonzero if nothing in this function can throw. */
+extern bool nothrow_function_p PARAMS ((void));
+
+/* After initial rtl generation, call back to finish generating
+ exception support code. */
+extern void finish_eh_generation PARAMS ((void));
+
+extern void init_eh PARAMS ((void));
+extern void init_eh_for_function PARAMS ((void));
+
+extern rtx reachable_handlers PARAMS ((rtx));
+extern void maybe_remove_eh_handler PARAMS ((rtx));
+
+extern void convert_from_eh_region_ranges PARAMS ((void));
+extern void convert_to_eh_region_ranges PARAMS ((void));
+extern void find_exception_handler_labels PARAMS ((void));
+extern bool current_function_has_exception_handlers PARAMS ((void));
+extern void output_function_exception_table PARAMS ((void));
+
+extern void expand_builtin_unwind_init PARAMS ((void));
+extern rtx expand_builtin_eh_return_data_regno PARAMS ((tree));
+extern rtx expand_builtin_extract_return_addr PARAMS ((tree));
+extern void expand_builtin_init_dwarf_reg_sizes PARAMS ((tree));
+extern rtx expand_builtin_frob_return_addr PARAMS ((tree));
+extern rtx expand_builtin_dwarf_fp_regnum PARAMS ((void));
+extern void expand_builtin_eh_return PARAMS ((tree, tree));
+extern void expand_eh_return PARAMS ((void));
+extern rtx get_exception_pointer PARAMS ((struct function *));
+extern int duplicate_eh_regions PARAMS ((struct function *,
+ struct inline_remap *));
+
+extern void sjlj_emit_function_exit_after PARAMS ((rtx));
+
+
+/* If non-NULL, this is a function that returns an expression to be
+ executed if an unhandled exception is propagated out of a cleanup
+ region. For example, in C++, an exception thrown by a destructor
+ during stack unwinding is required to result in a call to
+ `std::terminate', so the C++ version of this function returns a
+ CALL_EXPR for `std::terminate'. */
+extern tree (*lang_protect_cleanup_actions) PARAMS ((void));
+
+/* Return true if type A catches type B. */
+extern int (*lang_eh_type_covers) PARAMS ((tree a, tree b));
+
+/* Map a type to a runtime object to match type. */
+extern tree (*lang_eh_runtime_type) PARAMS ((tree));
+
+#ifndef GCC_VARRAY_H
+#undef varray_type