+struct GTY(()) eh_catch_d
+{
+ /* The double-linked list of all catch handlers for the region. */
+ struct eh_catch_d *next_catch;
+ struct eh_catch_d *prev_catch;
+
+ /* A TREE_LIST of runtime type objects that this catch handler
+ will catch, or NULL if all exceptions are caught. */
+ tree type_list;
+
+ /* A TREE_LIST of INTEGER_CSTs that correspond to the type_list entries,
+ having been mapped by assign_filter_values. These integers are to be
+ compared against the __builtin_eh_filter value. */
+ tree filter_list;
+
+ /* The code that should be executed if this catch handler matches the
+ thrown exception. This label is only maintained until
+ pass_lower_eh_dispatch, at which point it is cleared. */
+ tree label;
+};
+
+/* Describes one exception region. */
+
+struct GTY(()) eh_region_d
+{
+ /* The immediately surrounding region. */
+ struct eh_region_d *outer;
+
+ /* The list of immediately contained regions. */
+ struct eh_region_d *inner;
+ struct eh_region_d *next_peer;
+
+ /* The index of this region within fun->eh->region_array. */
+ int index;
+
+ /* Each region does exactly one thing. */
+ enum eh_region_type type;
+
+ /* Holds the action to perform based on the preceding type. */
+ union eh_region_u {
+ struct eh_region_u_try {
+ /* The double-linked list of all catch handlers for this region. */
+ struct eh_catch_d *first_catch;
+ struct eh_catch_d *last_catch;
+ } GTY ((tag ("ERT_TRY"))) eh_try;
+
+ struct eh_region_u_allowed {
+ /* A TREE_LIST of runtime type objects allowed to pass. */
+ tree type_list;
+ /* The code that should be executed if the thrown exception does
+ not match the type list. This label is only maintained until
+ pass_lower_eh_dispatch, at which point it is cleared. */
+ tree label;
+ /* The integer that will be passed by the runtime to signal that
+ we should execute the code at LABEL. This integer is assigned
+ by assign_filter_values and is to be compared against the
+ __builtin_eh_filter value. */
+ int filter;
+ } GTY ((tag ("ERT_ALLOWED_EXCEPTIONS"))) allowed;
+
+ struct eh_region_u_must_not_throw {
+ /* A function decl to be invoked if this region is actually reachable
+ from within the function, rather than implementable from the runtime.
+ The normal way for this to happen is for there to be a CLEANUP region
+ contained within this MUST_NOT_THROW region. Note that if the
+ runtime handles the MUST_NOT_THROW region, we have no control over
+ what termination function is called; it will be decided by the
+ personality function in effect for this CIE. */
+ tree failure_decl;
+ /* The location assigned to the call of FAILURE_DECL, if expanded. */
+ location_t failure_loc;
+ } GTY ((tag ("ERT_MUST_NOT_THROW"))) must_not_throw;
+ } GTY ((desc ("%0.type"))) u;
+
+ /* The list of landing pads associated with this region. */
+ struct eh_landing_pad_d *landing_pads;
+
+ /* EXC_PTR and FILTER values copied from the runtime for this region.
+ Each region gets its own psuedos so that if there are nested exceptions
+ we do not overwrite the values of the first exception. */
+ rtx exc_ptr_reg, filter_reg;
+
+ /* True if this region should use __cxa_end_cleanup instead
+ of _Unwind_Resume. */
+ bool use_cxa_end_cleanup;
+};