diff options
Diffstat (limited to 'gcc/except.h')
| -rw-r--r-- | gcc/except.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/gcc/except.h b/gcc/except.h index 2e3e794f7f3..73bbe4dc8d7 100644 --- a/gcc/except.h +++ b/gcc/except.h @@ -266,6 +266,11 @@ rtx rethrow_symbol_map PROTO((rtx, rtx (*)(rtx))); 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)); @@ -278,6 +283,46 @@ struct handler_info *get_first_handler PROTO((int)); 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. */ |
