/* Exception Handling interface routines.
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
- 2007, 2008 Free Software Foundation, Inc.
+ 2007, 2008, 2009 Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
This file is part of GCC.
struct function;
+/* The type of an exception region. */
+enum eh_region_type
+{
+ ERT_UNKNOWN = 0,
+ ERT_CLEANUP,
+ ERT_TRY,
+ ERT_CATCH,
+ ERT_ALLOWED_EXCEPTIONS,
+ ERT_MUST_NOT_THROW,
+ ERT_THROW
+};
+
/* Describes one exception region. */
-struct GTY(()) eh_region
+struct GTY(()) eh_region_d
{
/* The immediately surrounding region. */
- struct eh_region *outer;
+ struct eh_region_d *outer;
/* The list of immediately contained regions. */
- struct eh_region *inner;
- struct eh_region *next_peer;
+ struct eh_region_d *inner;
+ struct eh_region_d *next_peer;
+
+ /* List of regions sharing label. */
+ struct eh_region_d *next_region_sharing_label;
/* An identifier for this region. */
int region_number;
bitmap aka;
/* Each region does exactly one thing. */
- enum eh_region_type
- {
- ERT_UNKNOWN = 0,
- ERT_CLEANUP,
- ERT_TRY,
- ERT_CATCH,
- ERT_ALLOWED_EXCEPTIONS,
- ERT_MUST_NOT_THROW,
- ERT_THROW
- } type;
+ enum eh_region_type type;
/* Holds the action to perform based on the preceding type. */
union eh_region_u {
/* A list of catch blocks, a surrounding try block,
and the label for continuing after a catch. */
struct eh_region_u_try {
- struct eh_region *eh_catch;
- struct eh_region *last_catch;
+ struct eh_region_d *eh_catch;
+ struct eh_region_d *last_catch;
} GTY ((tag ("ERT_TRY"))) eh_try;
/* The list through the catch handlers, the list of type objects
matched, and the list of associated filters. */
struct eh_region_u_catch {
- struct eh_region *next_catch;
- struct eh_region *prev_catch;
+ struct eh_region_d *next_catch;
+ struct eh_region_d *prev_catch;
tree type_list;
tree filter_list;
} GTY ((tag ("ERT_CATCH"))) eh_catch;
struct eh_region_u_throw {
tree type;
} GTY ((tag ("ERT_THROW"))) eh_throw;
-
- /* Retain the cleanup expression even after expansion so that
- we can match up fixup regions. */
- struct eh_region_u_cleanup {
- struct eh_region *prev_try;
- } GTY ((tag ("ERT_CLEANUP"))) cleanup;
} GTY ((desc ("%0.type"))) u;
/* Entry point for this region's handler before landing pads are built. */
unsigned may_contain_throw : 1;
};
-typedef struct eh_region *eh_region;
+typedef struct eh_region_d *eh_region;
DEF_VEC_P(eh_region);
DEF_VEC_ALLOC_P(eh_region, gc);
DEF_VEC_ALLOC_P(eh_region, heap);
struct GTY(()) eh_status
{
/* The tree of all regions for this function. */
- struct eh_region *region_tree;
+ struct eh_region_d *region_tree;
/* The same information as an indexable array. */
VEC(eh_region,gc) *region_array;
/* Note that the current EH region (if any) may contain a throw, or a
call to a function which itself may contain a throw. */
-extern void note_eh_region_may_contain_throw (struct eh_region *);
+extern void note_eh_region_may_contain_throw (struct eh_region_d *);
/* 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));
/* Invokes CALLBACK for every exception region in the current function. */
-extern void for_each_eh_region (void (*) (struct eh_region *));
+extern void for_each_eh_region (void (*) (struct eh_region_d *));
/* Determine if the given INSN can throw an exception. */
extern bool can_throw_internal_1 (int, bool, bool);
extern void init_eh_for_function (void);
extern rtx reachable_handlers (rtx);
-void remove_eh_region (int);
+extern void remove_eh_region (int);
+extern void remove_eh_region_and_replace_by_outer_of (int, int);
extern void convert_from_eh_region_ranges (void);
extern unsigned int convert_to_eh_region_ranges (void);
extern void sjlj_emit_function_exit_after (rtx);
extern void default_init_unwind_resume_libfunc (void);
-extern struct eh_region *gen_eh_region_cleanup (struct eh_region *,
- struct eh_region *);
-extern struct eh_region *gen_eh_region_try (struct eh_region *);
-extern struct eh_region *gen_eh_region_catch (struct eh_region *, tree);
-extern struct eh_region *gen_eh_region_allowed (struct eh_region *, tree);
-extern struct eh_region *gen_eh_region_must_not_throw (struct eh_region *);
-extern int get_eh_region_number (struct eh_region *);
-extern bool get_eh_region_may_contain_throw (struct eh_region *);
+extern struct eh_region_d *gen_eh_region_cleanup (struct eh_region_d *);
+extern struct eh_region_d *gen_eh_region_try (struct eh_region_d *);
+extern struct eh_region_d *gen_eh_region_catch (struct eh_region_d *, tree);
+extern struct eh_region_d *gen_eh_region_allowed (struct eh_region_d *, tree);
+extern struct eh_region_d *gen_eh_region_must_not_throw (struct eh_region_d *);
+extern int get_eh_region_number (struct eh_region_d *);
+extern bool get_eh_region_may_contain_throw (struct eh_region_d *);
extern tree get_eh_region_no_tree_label (int);
-extern tree get_eh_region_tree_label (struct eh_region *);
-extern void set_eh_region_tree_label (struct eh_region *, tree);
+extern tree get_eh_region_tree_label (struct eh_region_d *);
+extern void set_eh_region_tree_label (struct eh_region_d *, tree);
extern void foreach_reachable_handler (int, bool, bool,
- void (*) (struct eh_region *, void *),
+ void (*) (struct eh_region_d *, void *),
void *);
extern void collect_eh_region_array (void);
-extern void expand_resx_expr (tree);
+extern void expand_resx_stmt (gimple);
extern void verify_eh_tree (struct function *);
extern void dump_eh_tree (FILE *, struct function *);
void debug_eh_tree (struct function *);
extern void remove_unreachable_regions (sbitmap, sbitmap);
extern VEC(int,heap) * label_to_region_map (void);
extern int num_eh_regions (void);
+extern bitmap must_not_throw_labels (void);
+extern struct eh_region_d *redirect_eh_edge_to_label (struct edge_def *, tree, bool, bool, int);
+extern int get_next_region_sharing_label (int);
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