X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fexcept.h;h=ef511c9051579f83ea6503e4963b157f6ed11fd3;hb=db2761c823a5d3d268a55bd869d7877d3c2a124d;hp=62796fefb3a54b13ea2263ca4969b5a268e826e1;hpb=bf763e52429a0416d008c2e940281585133f1bc0;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/except.h b/gcc/except.h index 62796fefb3a..ef511c90515 100644 --- a/gcc/except.h +++ b/gcc/except.h @@ -1,401 +1,388 @@ /* Exception Handling interface routines. - Copyright (C) 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, + 2007, 2008, 2009 Free Software Foundation, Inc. Contributed by Mike Stump . -This file is part of GNU CC. +This file is part of GCC. -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. +GCC 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 3, 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. +GCC 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. */ +along with GCC; see the file COPYING3. If not see +. */ -#if !defined(NULL_RTX) && !defined(rtx) -typedef struct rtx_def *_except_rtx; -#define rtx _except_rtx -#endif - -/* The label generated by expand_builtin_eh_return. */ - -extern rtx eh_return_stub_label; - -#ifdef TREE_CODE +#include "hashtab.h" +#include "vecprim.h" +#include "vecir.h" -/* A stack of labels. CHAIN points to the next entry in the stack. */ +struct function; +struct eh_region_d; +struct pointer_map_t; -struct label_node { - union { - rtx rlabel; - tree tlabel; - } u; - struct label_node *chain; +/* The type of an exception region. */ +enum eh_region_type +{ + /* CLEANUP regions implement e.g. destructors run when exiting a block. + They can be generated from both GIMPLE_TRY_FINALLY and GIMPLE_TRY_CATCH + nodes. It is expected by the runtime that cleanup regions will *not* + resume normal program flow, but will continue propagation of the + exception. */ + ERT_CLEANUP, + + /* TRY regions implement catching an exception. The list of types associated + with the attached catch handlers is examined in order by the runtime and + control is transfered to the appropriate handler. Note that a NULL type + list is a catch-all handler, and that it will catch *all* exceptions + including those originating from a different language. */ + ERT_TRY, + + /* ALLOWED_EXCEPTIONS regions implement exception filtering, e.g. the + throw(type-list) specification that can be added to C++ functions. + The runtime examines the thrown exception vs the type list, and if + the exception does not match, transfers control to the handler. The + normal handler for C++ calls __cxa_call_unexpected. */ + ERT_ALLOWED_EXCEPTIONS, + + /* MUST_NOT_THROW regions prevent all exceptions from propagating. This + region type is used in C++ to surround destructors being run inside a + CLEANUP region. This differs from an ALLOWED_EXCEPTIONS region with + an empty type list in that the runtime is prepared to terminate the + program directly. We only generate code for MUST_NOT_THROW regions + along control paths that are already handling an exception within the + current function. */ + ERT_MUST_NOT_THROW }; -/* An eh_entry is used to describe one exception handling region. - - OUTER_CONTEXT is the label used for rethrowing into the outer context. - - EXCEPTION_HANDLER_LABEL is the label corresponding to the handler - for this region. - - LABEL_USED indicates whether a CATCH block has already used this - label or not. New ones are needed for additional catch blocks if - it has. - FALSE_LABEL is used when either setjmp/longjmp exceptions are in - use, or old style table exceptions. It contains the label for - branching to the next runtime type check as handlers are processed. +/* A landing pad for a given exception region. Any transfer of control + from the EH runtime to the function happens at a landing pad. */ - FINALIZATION is the tree codes for the handler, or is NULL_TREE if - one hasn't been generated yet, or is integer_zero_node to mark the - end of a group of try blocks. */ - -struct eh_entry { - rtx outer_context; - rtx exception_handler_label; - tree finalization; - int label_used; - rtx false_label; - rtx rethrow_label; -}; - -/* A list of EH_ENTRYs. ENTRY is the entry; CHAIN points to the next - entry in the list, or is NULL if this is the last entry. */ - -struct eh_node { - struct eh_entry *entry; - struct eh_node *chain; +struct GTY(()) eh_landing_pad_d +{ + /* The linked list of all landing pads associated with the region. */ + struct eh_landing_pad_d *next_lp; + + /* The region with which this landing pad is associated. */ + struct eh_region_d *region; + + /* At the gimple level, the location to which control will be transfered + for this landing pad. There can be both EH and normal edges into the + block containing the post-landing-pad label. */ + tree post_landing_pad; + + /* At the rtl level, the location to which the runtime will transfer + control. This differs from the post-landing-pad in that the target's + EXCEPTION_RECEIVER pattern will be expanded here, as well as other + bookkeeping specific to exceptions. There must not be normal edges + into the block containing the landing-pad label. */ + rtx landing_pad; + + /* The index of this landing pad within fun->eh->lp_array. */ + int index; }; -/* A stack of EH_ENTRYs. TOP is the topmost entry on the stack. TOP is - NULL if the stack is empty. */ +/* A catch handler associated with an ERT_TRY region. */ -struct eh_stack { - struct eh_node *top; +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; }; -/* A queue of EH_ENTRYs. HEAD is the front of the queue; TAIL is the - end (the latest entry). HEAD and TAIL are NULL if the queue is - empty. */ +/* Describes one exception region. */ -struct eh_queue { - struct eh_node *head; - struct eh_node *tail; +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; }; -/* 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)); +typedef struct eh_landing_pad_d *eh_landing_pad; +typedef struct eh_catch_d *eh_catch; +typedef struct eh_region_d *eh_region; -/* 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. */ +DEF_VEC_P(eh_region); +DEF_VEC_ALLOC_P(eh_region, gc); +DEF_VEC_ALLOC_P(eh_region, heap); -extern void expand_eh_region_start_for_decl PROTO((tree)); +DEF_VEC_P(eh_landing_pad); +DEF_VEC_ALLOC_P(eh_landing_pad, gc); -/* 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 +/* The exception status for each function. */ -/* 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 +struct GTY(()) eh_status { - 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)); - -/* 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 ***)); - -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)); - -/* A stack used to keep track of the label used to resume normal program - flow out of the current exception handler region. */ - -extern struct label_node *caught_return_label_stack; - -/* 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 random area used for purposes elsewhere. */ - -extern struct label_node *false_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. */ + /* The tree of all regions for this function. */ + eh_region region_tree; + + /* The same information as an indexable array. */ + VEC(eh_region,gc) *region_array; + + /* The landing pads as an indexable array. */ + VEC(eh_landing_pad,gc) *lp_array; + + /* At the gimple level, a mapping from gimple statement to landing pad + or must-not-throw region. See record_stmt_eh_region. */ + htab_t GTY((param_is (struct throw_stmt_node))) throw_stmt_table; + + /* All of the runtime type data used by the function. These objects + are emitted to the lang-specific-data-area for the function. */ + VEC(tree,gc) *ttype_data; + + /* The table of all action chains. These encode the eh_region tree in + a compact form for use by the runtime, and is also emitted to the + lang-specific-data-area. Note that the ARM EABI uses a different + format for the encoding than all other ports. */ + union eh_status_u { + VEC(tree,gc) * GTY((tag ("1"))) arm_eabi; + VEC(uchar,gc) * GTY((tag ("0"))) other; + } GTY ((desc ("targetm.arm_eabi_unwinder"))) ehspec_data; +}; -extern int protect_cleanup_actions_with_terminate; -#ifdef TREE_CODE -extern tree protect_with_terminate PROTO((tree)); +/* Test: is exception handling turned on? */ +extern int doing_eh (int); + +/* 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 (void (*) (rtx)); + +extern void init_eh (void); +extern void init_eh_for_function (void); + +extern void remove_eh_landing_pad (eh_landing_pad); +extern void remove_eh_handler (eh_region); + +extern bool current_function_has_exception_handlers (void); +extern void output_function_exception_table (const char *); + +extern rtx expand_builtin_eh_pointer (tree); +extern rtx expand_builtin_eh_filter (tree); +extern rtx expand_builtin_eh_copy_values (tree); +extern void expand_builtin_unwind_init (void); +extern rtx expand_builtin_eh_return_data_regno (tree); +extern rtx expand_builtin_extract_return_addr (tree); +extern void expand_builtin_init_dwarf_reg_sizes (tree); +extern rtx expand_builtin_frob_return_addr (tree); +extern rtx expand_builtin_dwarf_sp_column (void); +extern void expand_builtin_eh_return (tree, tree); +extern void expand_eh_return (void); +extern rtx expand_builtin_extend_pointer (tree); + +typedef tree (*duplicate_eh_regions_map) (tree, void *); +extern struct pointer_map_t *duplicate_eh_regions + (struct function *, eh_region, int, duplicate_eh_regions_map, void *); + +extern void sjlj_emit_function_exit_after (rtx); + +extern eh_region gen_eh_region_cleanup (eh_region); +extern eh_region gen_eh_region_try (eh_region); +extern eh_region gen_eh_region_allowed (eh_region, tree); +extern eh_region gen_eh_region_must_not_throw (eh_region); + +extern eh_catch gen_eh_region_catch (eh_region, tree); +extern eh_landing_pad gen_eh_landing_pad (eh_region); + +extern eh_region get_eh_region_from_number_fn (struct function *, int); +extern eh_region get_eh_region_from_number (int); +extern eh_landing_pad get_eh_landing_pad_from_number_fn (struct function*,int); +extern eh_landing_pad get_eh_landing_pad_from_number (int); +extern eh_region get_eh_region_from_lp_number_fn (struct function *, int); +extern eh_region get_eh_region_from_lp_number (int); + +extern eh_region eh_region_outermost (struct function *, eh_region, eh_region); + +extern void make_reg_eh_region_note (rtx insn, int ecf_flags, int lp_nr); +extern void make_reg_eh_region_note_nothrow_nononlocal (rtx); + +extern void verify_eh_tree (struct function *); +extern void dump_eh_tree (FILE *, struct function *); +void debug_eh_tree (struct function *); +extern void add_type_for_runtime (tree); +extern tree lookup_type_for_runtime (tree); +extern void assign_filter_values (void); + +extern eh_region get_eh_region_from_rtx (const_rtx); +extern eh_landing_pad get_eh_landing_pad_from_rtx (const_rtx); + +/* If non-NULL, this is a function that returns a function decl 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 + FUNCTION_DECL for `std::terminate'. */ +extern tree (*lang_protect_cleanup_actions) (void); + + +/* Just because the user configured --with-sjlj-exceptions=no doesn't + mean that we can use call frame exceptions. Detect that the target + has appropriate support. */ + +#ifndef MUST_USE_SJLJ_EXCEPTIONS +# if defined (EH_RETURN_DATA_REGNO) \ + && (defined (TARGET_UNWIND_INFO) \ + || (DWARF2_UNWIND_INFO \ + && (defined (EH_RETURN_HANDLER_RTX) \ + || defined (HAVE_eh_return)))) +# define MUST_USE_SJLJ_EXCEPTIONS 0 +# else +# define MUST_USE_SJLJ_EXCEPTIONS 1 +# endif #endif -extern void expand_fixup_region_start PROTO((void)); -#ifdef TREE_CODE -extern void expand_fixup_region_end PROTO((tree)); +#ifdef CONFIG_SJLJ_EXCEPTIONS +# if CONFIG_SJLJ_EXCEPTIONS == 1 +# define USING_SJLJ_EXCEPTIONS 1 +# endif +# if CONFIG_SJLJ_EXCEPTIONS == 0 +# define USING_SJLJ_EXCEPTIONS 0 +# if !defined(EH_RETURN_DATA_REGNO) + #error "EH_RETURN_DATA_REGNO required" +# endif +# if ! (defined(TARGET_UNWIND_INFO) || DWARF2_UNWIND_INFO) + #error "{DWARF2,TARGET}_UNWIND_INFO required" +# endif +# if !defined(TARGET_UNWIND_INFO) \ + && !(defined(EH_RETURN_HANDLER_RTX) || defined(HAVE_eh_return)) + #error "EH_RETURN_HANDLER_RTX or eh_return required" +# endif +/* Usually the above error checks will have already triggered an + error, but backends may set MUST_USE_SJLJ_EXCEPTIONS for their own + reasons. */ +# if MUST_USE_SJLJ_EXCEPTIONS + #error "Must use SJLJ exceptions but configured not to" +# endif +# endif +#else +# define USING_SJLJ_EXCEPTIONS MUST_USE_SJLJ_EXCEPTIONS #endif -/* Various hooks for the DWARF 2 __throw routine. */ +struct GTY(()) throw_stmt_node { + gimple stmt; + int lp_nr; +}; -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)); +extern struct htab *get_eh_throw_stmt_table (struct function *); +extern void set_eh_throw_stmt_table (struct function *, struct htab *); +enum eh_personality_kind { + eh_personality_none, + eh_personality_any, + eh_personality_lang +}; -/* Checking whether 2 instructions are within the same exception region. */ +extern enum eh_personality_kind +function_needs_eh_personality (struct function *); -int in_same_eh_region PROTO((rtx, rtx)); -void free_insn_eh_region PROTO((void)); -void init_insn_eh_region PROTO((rtx, int)); +/* Pre-order iteration within the eh_region tree. */ -#ifdef rtx -#undef rtx -#endif +static inline eh_region +ehr_next (eh_region r, eh_region start) +{ + if (r->inner) + r = r->inner; + else if (r->next_peer && r != start) + r = r->next_peer; + else + { + do + { + r = r->outer; + if (r == start) + return NULL; + } + while (r->next_peer == NULL); + r = r->next_peer; + } + return r; +} + +#define FOR_ALL_EH_REGION_AT(R, START) \ + for ((R) = (START); (R) != NULL; (R) = ehr_next (R, START)) + +#define FOR_ALL_EH_REGION_FN(R, FN) \ + for ((R) = (FN)->eh->region_tree; (R) != NULL; (R) = ehr_next (R, NULL)) + +#define FOR_ALL_EH_REGION(R) FOR_ALL_EH_REGION_FN (R, cfun)