/* Implements exception handling.
- Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+ 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
This file is part of GCC.
#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "rtl.h"
#include "tree.h"
#include "flags.h"
#include "ggc.h"
#include "tm_p.h"
#include "target.h"
+#include "langhooks.h"
+#include "cgraph.h"
/* Provide defaults for stuff that may not be defined when using
sjlj exceptions. */
-#ifndef EH_RETURN_STACKADJ_RTX
-#define EH_RETURN_STACKADJ_RTX 0
-#endif
-#ifndef EH_RETURN_HANDLER_RTX
-#define EH_RETURN_HANDLER_RTX 0
-#endif
#ifndef EH_RETURN_DATA_REGNO
#define EH_RETURN_DATA_REGNO(N) INVALID_REGNUM
#endif
/* Protect cleanup actions with must-not-throw regions, with a call
to the given failure handler. */
-tree (*lang_protect_cleanup_actions) PARAMS ((void));
+tree (*lang_protect_cleanup_actions) (void);
/* Return true if type A catches type B. */
-int (*lang_eh_type_covers) PARAMS ((tree a, tree b));
+int (*lang_eh_type_covers) (tree a, tree b);
/* Map a type to a runtime object to match type. */
-tree (*lang_eh_runtime_type) PARAMS ((tree));
+tree (*lang_eh_runtime_type) (tree);
-/* A list of labels used for exception handlers. */
-rtx exception_handler_labels;
+/* A hash table of label to region number. */
+
+struct ehl_map_entry GTY(())
+{
+ rtx label;
+ struct eh_region *region;
+};
-static int call_site_base;
-static unsigned int sjlj_funcdef_number;
-static htab_t type_to_runtime_map;
+static GTY(()) int call_site_base;
+static GTY ((param_is (union tree_node)))
+ htab_t type_to_runtime_map;
/* Describe the SjLj_Function_Context structure. */
-static tree sjlj_fc_type_node;
+static GTY(()) tree sjlj_fc_type_node;
static int sjlj_fc_call_site_ofs;
static int sjlj_fc_data_ofs;
static int sjlj_fc_personality_ofs;
static int sjlj_fc_jbuf_ofs;
\f
/* Describes one exception region. */
-struct eh_region
+struct eh_region GTY(())
{
/* The immediately surrounding region. */
struct eh_region *outer;
/* An identifier for this region. */
int region_number;
+ /* When a region is deleted, its parents inherit the REG_EH_REGION
+ numbers already assigned. */
+ bitmap aka;
+
/* Each region does exactly one thing. */
enum eh_region_type
{
} type;
/* Holds the action to perform based on the preceding type. */
- union {
+ union eh_region_u {
/* A list of catch blocks, a surrounding try block,
and the label for continuing after a catch. */
- struct {
+ struct eh_region_u_try {
struct eh_region *catch;
struct eh_region *last_catch;
struct eh_region *prev_try;
rtx continue_label;
- } try;
+ } GTY ((tag ("ERT_TRY"))) try;
/* The list through the catch handlers, the list of type objects
matched, and the list of associated filters. */
- struct {
+ struct eh_region_u_catch {
struct eh_region *next_catch;
struct eh_region *prev_catch;
tree type_list;
tree filter_list;
- } catch;
+ } GTY ((tag ("ERT_CATCH"))) catch;
/* A tree_list of allowed types. */
- struct {
+ struct eh_region_u_allowed {
tree type_list;
int filter;
- } allowed;
+ } GTY ((tag ("ERT_ALLOWED_EXCEPTIONS"))) allowed;
- /* The type given by a call to "throw foo();", or discovered
+ /* The type given by a call to "throw foo();", or discovered
for a throw. */
- struct {
+ struct eh_region_u_throw {
tree type;
- } throw;
+ } GTY ((tag ("ERT_THROW"))) throw;
/* Retain the cleanup expression even after expansion so that
we can match up fixup regions. */
- struct {
+ struct eh_region_u_cleanup {
tree exp;
- } cleanup;
+ struct eh_region *prev_try;
+ } GTY ((tag ("ERT_CLEANUP"))) cleanup;
/* The real region (by expression and by pointer) that fixup code
should live in. */
- struct {
+ struct eh_region_u_fixup {
tree cleanup_exp;
struct eh_region *real_region;
- } fixup;
- } u;
+ bool resolved;
+ } GTY ((tag ("ERT_FIXUP"))) fixup;
+ } GTY ((desc ("%0.type"))) u;
/* Entry point for this region's handler before landing pads are built. */
rtx label;
/* The RESX insn for handing off control to the next outermost handler,
if appropriate. */
rtx resume;
+
+ /* True if something in this region may throw. */
+ unsigned may_contain_throw : 1;
+};
+
+struct call_site_record GTY(())
+{
+ rtx landing_pad;
+ int action;
};
/* Used to save exception status for each function. */
-struct eh_status
+struct eh_status GTY(())
{
/* The tree of all regions for this function. */
struct eh_region *region_tree;
/* The same information as an indexable array. */
- struct eh_region **region_array;
+ struct eh_region ** GTY ((length ("%h.last_region_number"))) region_array;
/* The most recently open region. */
struct eh_region *cur_region;
/* This is the region for which we are processing catch blocks. */
struct eh_region *try_region;
- /* A stack (TREE_LIST) of lists of handlers. The TREE_VALUE of each
- node is itself a TREE_CHAINed list of handlers for regions that
- are not yet closed. The TREE_VALUE of each entry contains the
- handler for the corresponding entry on the ehstack. */
- tree protect_list;
-
rtx filter;
rtx exc_ptr;
varray_type ehspec_data;
varray_type action_record_data;
- struct call_site_record
- {
- rtx landing_pad;
- int action;
- } *call_site_data;
+ htab_t GTY ((param_is (struct ehl_map_entry))) exception_handler_label_map;
+
+ struct call_site_record * GTY ((length ("%h.call_site_data_used")))
+ call_site_data;
int call_site_data_used;
int call_site_data_size;
};
\f
-static void mark_eh_region PARAMS ((struct eh_region *));
-
-static int t2r_eq PARAMS ((const PTR,
- const PTR));
-static hashval_t t2r_hash PARAMS ((const PTR));
-static int t2r_mark_1 PARAMS ((PTR *, PTR));
-static void t2r_mark PARAMS ((PTR));
-static void add_type_for_runtime PARAMS ((tree));
-static tree lookup_type_for_runtime PARAMS ((tree));
-
-static struct eh_region *expand_eh_region_end PARAMS ((void));
-
-static rtx get_exception_filter PARAMS ((struct function *));
-
-static void collect_eh_region_array PARAMS ((void));
-static void resolve_fixup_regions PARAMS ((void));
-static void remove_fixup_regions PARAMS ((void));
-static void convert_from_eh_region_ranges_1 PARAMS ((rtx *, int *, int));
-
-static struct eh_region *duplicate_eh_region_1 PARAMS ((struct eh_region *,
- struct inline_remap *));
-static void duplicate_eh_region_2 PARAMS ((struct eh_region *,
- struct eh_region **));
-static int ttypes_filter_eq PARAMS ((const PTR,
- const PTR));
-static hashval_t ttypes_filter_hash PARAMS ((const PTR));
-static int ehspec_filter_eq PARAMS ((const PTR,
- const PTR));
-static hashval_t ehspec_filter_hash PARAMS ((const PTR));
-static int add_ttypes_entry PARAMS ((htab_t, tree));
-static int add_ehspec_entry PARAMS ((htab_t, htab_t,
- tree));
-static void assign_filter_values PARAMS ((void));
-static void build_post_landing_pads PARAMS ((void));
-static void connect_post_landing_pads PARAMS ((void));
-static void dw2_build_landing_pads PARAMS ((void));
+static int t2r_eq (const void *, const void *);
+static hashval_t t2r_hash (const void *);
+static void add_type_for_runtime (tree);
+static tree lookup_type_for_runtime (tree);
+
+static struct eh_region *expand_eh_region_end (void);
+
+static rtx get_exception_filter (struct function *);
+
+static void collect_eh_region_array (void);
+static void resolve_fixup_regions (void);
+static void remove_fixup_regions (void);
+static void remove_unreachable_regions (rtx);
+static void convert_from_eh_region_ranges_1 (rtx *, int *, int);
+
+static struct eh_region *duplicate_eh_region_1 (struct eh_region *,
+ struct inline_remap *);
+static void duplicate_eh_region_2 (struct eh_region *, struct eh_region **);
+static int ttypes_filter_eq (const void *, const void *);
+static hashval_t ttypes_filter_hash (const void *);
+static int ehspec_filter_eq (const void *, const void *);
+static hashval_t ehspec_filter_hash (const void *);
+static int add_ttypes_entry (htab_t, tree);
+static int add_ehspec_entry (htab_t, htab_t, tree);
+static void assign_filter_values (void);
+static void build_post_landing_pads (void);
+static void connect_post_landing_pads (void);
+static void dw2_build_landing_pads (void);
struct sjlj_lp_info;
-static bool sjlj_find_directly_reachable_regions
- PARAMS ((struct sjlj_lp_info *));
-static void sjlj_assign_call_site_values
- PARAMS ((rtx, struct sjlj_lp_info *));
-static void sjlj_mark_call_sites
- PARAMS ((struct sjlj_lp_info *));
-static void sjlj_emit_function_enter PARAMS ((rtx));
-static void sjlj_emit_function_exit PARAMS ((void));
-static void sjlj_emit_dispatch_table
- PARAMS ((rtx, struct sjlj_lp_info *));
-static void sjlj_build_landing_pads PARAMS ((void));
-
-static void remove_exception_handler_label PARAMS ((rtx));
-static void remove_eh_handler PARAMS ((struct eh_region *));
+static bool sjlj_find_directly_reachable_regions (struct sjlj_lp_info *);
+static void sjlj_assign_call_site_values (rtx, struct sjlj_lp_info *);
+static void sjlj_mark_call_sites (struct sjlj_lp_info *);
+static void sjlj_emit_function_enter (rtx);
+static void sjlj_emit_function_exit (void);
+static void sjlj_emit_dispatch_table (rtx, struct sjlj_lp_info *);
+static void sjlj_build_landing_pads (void);
+
+static hashval_t ehl_hash (const void *);
+static int ehl_eq (const void *, const void *);
+static void add_ehl_entry (rtx, struct eh_region *);
+static void remove_exception_handler_label (rtx);
+static void remove_eh_handler (struct eh_region *);
+static int for_each_eh_label_1 (void **, void *);
struct reachable_info;
RNL_BLOCKED
};
-static int check_handled PARAMS ((tree, tree));
-static void add_reachable_handler
- PARAMS ((struct reachable_info *, struct eh_region *,
- struct eh_region *));
-static enum reachable_code reachable_next_level
- PARAMS ((struct eh_region *, tree, struct reachable_info *));
-
-static int action_record_eq PARAMS ((const PTR,
- const PTR));
-static hashval_t action_record_hash PARAMS ((const PTR));
-static int add_action_record PARAMS ((htab_t, int, int));
-static int collect_one_action_chain PARAMS ((htab_t,
- struct eh_region *));
-static int add_call_site PARAMS ((rtx, int));
-
-static void push_uleb128 PARAMS ((varray_type *,
- unsigned int));
-static void push_sleb128 PARAMS ((varray_type *, int));
+static int check_handled (tree, tree);
+static void add_reachable_handler (struct reachable_info *,
+ struct eh_region *, struct eh_region *);
+static enum reachable_code reachable_next_level (struct eh_region *, tree,
+ struct reachable_info *);
+
+static int action_record_eq (const void *, const void *);
+static hashval_t action_record_hash (const void *);
+static int add_action_record (htab_t, int, int);
+static int collect_one_action_chain (htab_t, struct eh_region *);
+static int add_call_site (rtx, int);
+
+static void push_uleb128 (varray_type *, unsigned int);
+static void push_sleb128 (varray_type *, int);
#ifndef HAVE_AS_LEB128
-static int dw2_size_of_call_site_table PARAMS ((void));
-static int sjlj_size_of_call_site_table PARAMS ((void));
+static int dw2_size_of_call_site_table (void);
+static int sjlj_size_of_call_site_table (void);
#endif
-static void dw2_output_call_site_table PARAMS ((void));
-static void sjlj_output_call_site_table PARAMS ((void));
+static void dw2_output_call_site_table (void);
+static void sjlj_output_call_site_table (void);
\f
/* Routine to see if exception handling is turned on.
- DO_WARN is non-zero if we want to inform the user that exception
- handling is turned off.
+ DO_WARN is nonzero if we want to inform the user that exception
+ handling is turned off.
This is used to ensure that -fexceptions has been specified if the
compiler tries to use any exception-specific functions. */
int
-doing_eh (do_warn)
- int do_warn;
+doing_eh (int do_warn)
{
if (! flag_exceptions)
{
\f
void
-init_eh ()
+init_eh (void)
{
- ggc_add_rtx_root (&exception_handler_labels, 1);
-
if (! flag_exceptions)
return;
- type_to_runtime_map = htab_create (31, t2r_hash, t2r_eq, NULL);
- ggc_add_root (&type_to_runtime_map, 1, sizeof (htab_t), t2r_mark);
+ type_to_runtime_map = htab_create_ggc (31, t2r_hash, t2r_eq, NULL);
/* Create the SjLj_Function_Context structure. This should match
the definition in unwind-sjlj.c. */
{
tree f_jbuf, f_per, f_lsda, f_prev, f_cs, f_data, tmp;
- sjlj_fc_type_node = make_lang_type (RECORD_TYPE);
- ggc_add_tree_root (&sjlj_fc_type_node, 1);
+ sjlj_fc_type_node = (*lang_hooks.types.make_type) (RECORD_TYPE);
f_prev = build_decl (FIELD_DECL, get_identifier ("__prev"),
build_pointer_type (sjlj_fc_type_node));
DECL_FIELD_CONTEXT (f_cs) = sjlj_fc_type_node;
tmp = build_index_type (build_int_2 (4 - 1, 0));
- tmp = build_array_type (type_for_mode (word_mode, 1), tmp);
+ tmp = build_array_type ((*lang_hooks.types.type_for_mode) (word_mode, 1),
+ tmp);
f_data = build_decl (FIELD_DECL, get_identifier ("__data"), tmp);
DECL_FIELD_CONTEXT (f_data) = sjlj_fc_type_node;
tmp = build_int_2 (FIRST_PSEUDO_REGISTER + 2 - 1, 0);
#endif
#else
- /* This is 2 for builtin_setjmp, plus whatever the target requires
- via STACK_SAVEAREA_MODE (SAVE_NONLOCAL). */
- tmp = build_int_2 ((GET_MODE_SIZE (STACK_SAVEAREA_MODE (SAVE_NONLOCAL))
- / GET_MODE_SIZE (Pmode)) + 2 - 1, 0);
+ /* builtin_setjmp takes a pointer to 5 words. */
+ tmp = build_int_2 (5 * BITS_PER_WORD / POINTER_SIZE - 1, 0);
#endif
tmp = build_index_type (tmp);
tmp = build_array_type (ptr_type_node, tmp);
}
void
-init_eh_for_function ()
-{
- cfun->eh = (struct eh_status *) xcalloc (1, sizeof (struct eh_status));
-}
-
-/* Mark EH for GC. */
-
-static void
-mark_eh_region (region)
- struct eh_region *region;
-{
- if (! region)
- return;
-
- switch (region->type)
- {
- case ERT_UNKNOWN:
- /* This can happen if a nested function is inside the body of a region
- and we do a GC as part of processing it. */
- break;
- case ERT_CLEANUP:
- ggc_mark_tree (region->u.cleanup.exp);
- break;
- case ERT_TRY:
- ggc_mark_rtx (region->u.try.continue_label);
- break;
- case ERT_CATCH:
- ggc_mark_tree (region->u.catch.type_list);
- ggc_mark_tree (region->u.catch.filter_list);
- break;
- case ERT_ALLOWED_EXCEPTIONS:
- ggc_mark_tree (region->u.allowed.type_list);
- break;
- case ERT_MUST_NOT_THROW:
- break;
- case ERT_THROW:
- ggc_mark_tree (region->u.throw.type);
- break;
- case ERT_FIXUP:
- ggc_mark_tree (region->u.fixup.cleanup_exp);
- break;
- default:
- abort ();
- }
-
- ggc_mark_rtx (region->label);
- ggc_mark_rtx (region->resume);
- ggc_mark_rtx (region->landing_pad);
- ggc_mark_rtx (region->post_landing_pad);
-}
-
-void
-mark_eh_status (eh)
- struct eh_status *eh;
-{
- int i;
-
- if (eh == 0)
- return;
-
- /* If we've called collect_eh_region_array, use it. Otherwise walk
- the tree non-recursively. */
- if (eh->region_array)
- {
- for (i = eh->last_region_number; i > 0; --i)
- {
- struct eh_region *r = eh->region_array[i];
- if (r && r->region_number == i)
- mark_eh_region (r);
- }
- }
- else if (eh->region_tree)
- {
- struct eh_region *r = eh->region_tree;
- while (1)
- {
- mark_eh_region (r);
- if (r->inner)
- r = r->inner;
- else if (r->next_peer)
- r = r->next_peer;
- else
- {
- do {
- r = r->outer;
- if (r == NULL)
- goto tree_done;
- } while (r->next_peer == NULL);
- r = r->next_peer;
- }
- }
- tree_done:;
- }
-
- ggc_mark_tree (eh->protect_list);
- ggc_mark_rtx (eh->filter);
- ggc_mark_rtx (eh->exc_ptr);
- ggc_mark_tree_varray (eh->ttype_data);
-
- if (eh->call_site_data)
- {
- for (i = eh->call_site_data_used - 1; i >= 0; --i)
- ggc_mark_rtx (eh->call_site_data[i].landing_pad);
- }
-
- ggc_mark_rtx (eh->ehr_stackadj);
- ggc_mark_rtx (eh->ehr_handler);
- ggc_mark_rtx (eh->ehr_label);
-
- ggc_mark_rtx (eh->sjlj_fc);
- ggc_mark_rtx (eh->sjlj_exit_after);
-}
-
-void
-free_eh_status (f)
- struct function *f;
+init_eh_for_function (void)
{
- struct eh_status *eh = f->eh;
-
- if (eh->region_array)
- {
- int i;
- for (i = eh->last_region_number; i > 0; --i)
- {
- struct eh_region *r = eh->region_array[i];
- /* Mind we don't free a region struct more than once. */
- if (r && r->region_number == i)
- free (r);
- }
- free (eh->region_array);
- }
- else if (eh->region_tree)
- {
- struct eh_region *next, *r = eh->region_tree;
- while (1)
- {
- if (r->inner)
- r = r->inner;
- else if (r->next_peer)
- {
- next = r->next_peer;
- free (r);
- r = next;
- }
- else
- {
- do {
- next = r->outer;
- free (r);
- r = next;
- if (r == NULL)
- goto tree_done;
- } while (r->next_peer == NULL);
- next = r->next_peer;
- free (r);
- r = next;
- }
- }
- tree_done:;
- }
-
- VARRAY_FREE (eh->ttype_data);
- VARRAY_FREE (eh->ehspec_data);
- VARRAY_FREE (eh->action_record_data);
- if (eh->call_site_data)
- free (eh->call_site_data);
-
- free (eh);
- f->eh = NULL;
+ cfun->eh = ggc_alloc_cleared (sizeof (struct eh_status));
}
-
\f
/* 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. */
void
-expand_eh_region_start ()
+expand_eh_region_start (void)
{
struct eh_region *new_region;
struct eh_region *cur_region;
return;
/* Insert a new blank region as a leaf in the tree. */
- new_region = (struct eh_region *) xcalloc (1, sizeof (*new_region));
+ new_region = ggc_alloc_cleared (sizeof (*new_region));
cur_region = cfun->eh->cur_region;
new_region->outer = cur_region;
if (cur_region)
/* Create a note marking the start of this region. */
new_region->region_number = ++cfun->eh->last_region_number;
- note = emit_note (NULL, NOTE_INSN_EH_REGION_BEG);
+ note = emit_note (NOTE_INSN_EH_REGION_BEG);
NOTE_EH_HANDLER (note) = new_region->region_number;
}
/* Common code to end a region. Returns the region just ended. */
static struct eh_region *
-expand_eh_region_end ()
+expand_eh_region_end (void)
{
struct eh_region *cur_region = cfun->eh->cur_region;
rtx note;
/* Create a note marking the end of this region. */
- note = emit_note (NULL, NOTE_INSN_EH_REGION_END);
+ note = emit_note (NOTE_INSN_EH_REGION_END);
NOTE_EH_HANDLER (note) = cur_region->region_number;
/* Pop. */
expression to expand for the cleanup. */
void
-expand_eh_region_end_cleanup (handler)
- tree handler;
+expand_eh_region_end_cleanup (tree handler)
{
struct eh_region *region;
tree protect_cleanup_actions;
region->type = ERT_CLEANUP;
region->label = gen_label_rtx ();
region->u.cleanup.exp = handler;
+ region->u.cleanup.prev_try = cfun->eh->try_region;
around_label = gen_label_rtx ();
emit_jump (around_label);
emit_label (region->label);
- /* Give the language a chance to specify an action to be taken if an
- exception is thrown that would propagate out of the HANDLER. */
- protect_cleanup_actions
- = (lang_protect_cleanup_actions
- ? (*lang_protect_cleanup_actions) ()
- : NULL_TREE);
+ if (flag_non_call_exceptions || region->may_contain_throw)
+ {
+ /* Give the language a chance to specify an action to be taken if an
+ exception is thrown that would propagate out of the HANDLER. */
+ protect_cleanup_actions
+ = (lang_protect_cleanup_actions
+ ? (*lang_protect_cleanup_actions) ()
+ : NULL_TREE);
- if (protect_cleanup_actions)
- expand_eh_region_start ();
+ if (protect_cleanup_actions)
+ expand_eh_region_start ();
- /* In case this cleanup involves an inline destructor with a try block in
- it, we need to save the EH return data registers around it. */
- data_save[0] = gen_reg_rtx (Pmode);
- emit_move_insn (data_save[0], get_exception_pointer (cfun));
- data_save[1] = gen_reg_rtx (word_mode);
- emit_move_insn (data_save[1], get_exception_filter (cfun));
+ /* In case this cleanup involves an inline destructor with a try block in
+ it, we need to save the EH return data registers around it. */
+ data_save[0] = gen_reg_rtx (ptr_mode);
+ emit_move_insn (data_save[0], get_exception_pointer (cfun));
+ data_save[1] = gen_reg_rtx (word_mode);
+ emit_move_insn (data_save[1], get_exception_filter (cfun));
- expand_expr (handler, const0_rtx, VOIDmode, 0);
+ expand_expr (handler, const0_rtx, VOIDmode, 0);
- emit_move_insn (cfun->eh->exc_ptr, data_save[0]);
- emit_move_insn (cfun->eh->filter, data_save[1]);
+ emit_move_insn (cfun->eh->exc_ptr, data_save[0]);
+ emit_move_insn (cfun->eh->filter, data_save[1]);
- if (protect_cleanup_actions)
- expand_eh_region_end_must_not_throw (protect_cleanup_actions);
+ if (protect_cleanup_actions)
+ expand_eh_region_end_must_not_throw (protect_cleanup_actions);
- /* We need any stack adjustment complete before the around_label. */
- do_pending_stack_adjust ();
+ /* We need any stack adjustment complete before the around_label. */
+ do_pending_stack_adjust ();
+ }
/* We delay the generation of the _Unwind_Resume until we generate
landing pads. We emit a marker here so as to get good control
for subsequent calls to expand_start_catch. */
void
-expand_start_all_catch ()
+expand_start_all_catch (void)
{
struct eh_region *region;
/* Begin a catch clause. TYPE is the type caught, a list of such types, or
null if this is a catch-all clause. Providing a type list enables to
associate the catch region with potentially several exception types, which
- is useful e.g. for Ada. */
+ is useful e.g. for Ada. */
void
-expand_start_catch (type_or_list)
- tree type_or_list;
+expand_start_catch (tree type_or_list)
{
struct eh_region *t, *c, *l;
tree type_list;
tree type_node;
if (TREE_CODE (type_or_list) != TREE_LIST)
- type_list = tree_cons (NULL_TREE, type_or_list, NULL_TREE);
+ type_list = tree_cons (NULL_TREE, type_or_list, NULL_TREE);
type_node = type_list;
for (; type_node; type_node = TREE_CHAIN (type_node))
- add_type_for_runtime (TREE_VALUE (type_node));
+ add_type_for_runtime (TREE_VALUE (type_node));
}
expand_eh_region_start ();
/* End a catch clause. Control will resume after the try/catch block. */
void
-expand_end_catch ()
+expand_end_catch (void)
{
- struct eh_region *try_region, *catch_region;
+ struct eh_region *try_region;
if (! doing_eh (0))
return;
- catch_region = expand_eh_region_end ();
+ expand_eh_region_end ();
try_region = cfun->eh->try_region;
emit_jump (try_region->u.try.continue_label);
/* End a sequence of catch handlers for a try block. */
void
-expand_end_all_catch ()
+expand_end_all_catch (void)
{
struct eh_region *try_region;
rethrowing satisfies the "filter" of the catch type. */
void
-expand_eh_region_end_allowed (allowed, failure)
- tree allowed, failure;
+expand_eh_region_end_allowed (tree allowed, tree failure)
{
struct eh_region *region;
rtx around_label;
the C++ LSDA. */
void
-expand_eh_region_end_must_not_throw (failure)
- tree failure;
+expand_eh_region_end_must_not_throw (tree failure)
{
struct eh_region *region;
rtx around_label;
is being thrown. */
void
-expand_eh_region_end_throw (type)
- tree type;
+expand_eh_region_end_throw (tree type)
{
struct eh_region *region;
the proper notion of "enclosing" in convert_from_eh_region_ranges. */
void
-expand_eh_region_end_fixup (handler)
- tree handler;
+expand_eh_region_end_fixup (tree handler)
{
struct eh_region *fixup;
fixup->u.fixup.cleanup_exp = handler;
}
+/* Note that the current EH region (if any) may contain a throw, or a
+ call to a function which itself may contain a throw. */
+
+void
+note_eh_region_may_contain_throw (void)
+{
+ struct eh_region *region;
+
+ region = cfun->eh->cur_region;
+ while (region && !region->may_contain_throw)
+ {
+ region->may_contain_throw = 1;
+ region = region->outer;
+ }
+}
+
/* Return an rtl expression for a pointer to the exception object
within a handler. */
rtx
-get_exception_pointer (fun)
- struct function *fun;
+get_exception_pointer (struct function *fun)
{
rtx exc_ptr = fun->eh->exc_ptr;
if (fun == cfun && ! exc_ptr)
{
- exc_ptr = gen_reg_rtx (Pmode);
+ exc_ptr = gen_reg_rtx (ptr_mode);
fun->eh->exc_ptr = exc_ptr;
}
return exc_ptr;
within a handler. */
static rtx
-get_exception_filter (fun)
- struct function *fun;
+get_exception_filter (struct function *fun)
{
rtx filter = fun->eh->filter;
if (fun == cfun && ! filter)
return filter;
}
\f
-/* Begin a region that will contain entries created with
- add_partial_entry. */
-
-void
-begin_protect_partials ()
-{
- /* Push room for a new list. */
- cfun->eh->protect_list
- = tree_cons (NULL_TREE, NULL_TREE, cfun->eh->protect_list);
-}
-
-/* Start a new exception region for a region of code that has a
- cleanup action and push the HANDLER for the region onto
- protect_list. All of the regions created with add_partial_entry
- will be ended when end_protect_partials is invoked. */
-
-void
-add_partial_entry (handler)
- tree handler;
-{
- expand_eh_region_start ();
-
- /* ??? This comment was old before the most recent rewrite. We
- really ought to fix the callers at some point. */
- /* For backwards compatibility, we allow callers to omit calls to
- begin_protect_partials for the outermost region. So, we must
- explicitly do so here. */
- if (!cfun->eh->protect_list)
- begin_protect_partials ();
-
- /* Add this entry to the front of the list. */
- TREE_VALUE (cfun->eh->protect_list)
- = tree_cons (NULL_TREE, handler, TREE_VALUE (cfun->eh->protect_list));
-}
-
-/* End all the pending exception regions on protect_list. */
-
-void
-end_protect_partials ()
-{
- tree t;
-
- /* ??? This comment was old before the most recent rewrite. We
- really ought to fix the callers at some point. */
- /* For backwards compatibility, we allow callers to omit the call to
- begin_protect_partials for the outermost region. So,
- PROTECT_LIST may be NULL. */
- if (!cfun->eh->protect_list)
- return;
-
- /* Pop the topmost entry. */
- t = TREE_VALUE (cfun->eh->protect_list);
- cfun->eh->protect_list = TREE_CHAIN (cfun->eh->protect_list);
-
- /* End all the exception regions. */
- for (; t; t = TREE_CHAIN (t))
- expand_eh_region_end_cleanup (TREE_VALUE (t));
-}
-
-\f
/* This section is for the exception handling specific optimization pass. */
/* Random access the exception region tree. It's just as simple to
without having to realloc memory. */
static void
-collect_eh_region_array ()
+collect_eh_region_array (void)
{
struct eh_region **array, *i;
if (! i)
return;
- array = xcalloc (cfun->eh->last_region_number + 1, sizeof (*array));
+ array = ggc_alloc_cleared ((cfun->eh->last_region_number + 1)
+ * sizeof (*array));
cfun->eh->region_array = array;
while (1)
}
static void
-resolve_fixup_regions ()
+resolve_one_fixup_region (struct eh_region *fixup)
+{
+ struct eh_region *cleanup, *real;
+ int j, n;
+
+ n = cfun->eh->last_region_number;
+ cleanup = 0;
+
+ for (j = 1; j <= n; ++j)
+ {
+ cleanup = cfun->eh->region_array[j];
+ if (cleanup && cleanup->type == ERT_CLEANUP
+ && cleanup->u.cleanup.exp == fixup->u.fixup.cleanup_exp)
+ break;
+ }
+ if (j > n)
+ abort ();
+
+ real = cleanup->outer;
+ if (real && real->type == ERT_FIXUP)
+ {
+ if (!real->u.fixup.resolved)
+ resolve_one_fixup_region (real);
+ real = real->u.fixup.real_region;
+ }
+
+ fixup->u.fixup.real_region = real;
+ fixup->u.fixup.resolved = true;
+}
+
+static void
+resolve_fixup_regions (void)
{
- int i, j, n = cfun->eh->last_region_number;
+ int i, n = cfun->eh->last_region_number;
for (i = 1; i <= n; ++i)
{
struct eh_region *fixup = cfun->eh->region_array[i];
- struct eh_region *cleanup = 0;
- if (! fixup || fixup->type != ERT_FIXUP)
+ if (!fixup || fixup->type != ERT_FIXUP || fixup->u.fixup.resolved)
continue;
- for (j = 1; j <= n; ++j)
- {
- cleanup = cfun->eh->region_array[j];
- if (cleanup->type == ERT_CLEANUP
- && cleanup->u.cleanup.exp == fixup->u.fixup.cleanup_exp)
- break;
- }
- if (j > n)
- abort ();
-
- fixup->u.fixup.real_region = cleanup->outer;
+ resolve_one_fixup_region (fixup);
}
}
we can shuffle pointers and remove them from the tree. */
static void
-remove_fixup_regions ()
+remove_fixup_regions (void)
{
int i;
rtx insn, note;
/* Allow GC to maybe free some memory. */
if (fixup->type == ERT_CLEANUP)
- fixup->u.cleanup.exp = NULL_TREE;
+ fixup->u.cleanup.exp = NULL_TREE;
if (fixup->type != ERT_FIXUP)
continue;
}
}
+/* Remove all regions whose labels are not reachable from insns. */
+
+static void
+remove_unreachable_regions (rtx insns)
+{
+ int i, *uid_region_num;
+ bool *reachable;
+ struct eh_region *r;
+ rtx insn;
+
+ uid_region_num = xcalloc (get_max_uid (), sizeof(int));
+ reachable = xcalloc (cfun->eh->last_region_number + 1, sizeof(bool));
+
+ for (i = cfun->eh->last_region_number; i > 0; --i)
+ {
+ r = cfun->eh->region_array[i];
+ if (!r || r->region_number != i)
+ continue;
+
+ if (r->resume)
+ {
+ if (uid_region_num[INSN_UID (r->resume)])
+ abort ();
+ uid_region_num[INSN_UID (r->resume)] = i;
+ }
+ if (r->label)
+ {
+ if (uid_region_num[INSN_UID (r->label)])
+ abort ();
+ uid_region_num[INSN_UID (r->label)] = i;
+ }
+ if (r->type == ERT_TRY && r->u.try.continue_label)
+ {
+ if (uid_region_num[INSN_UID (r->u.try.continue_label)])
+ abort ();
+ uid_region_num[INSN_UID (r->u.try.continue_label)] = i;
+ }
+ }
+
+ for (insn = insns; insn; insn = NEXT_INSN (insn))
+ reachable[uid_region_num[INSN_UID (insn)]] = true;
+
+ for (i = cfun->eh->last_region_number; i > 0; --i)
+ {
+ r = cfun->eh->region_array[i];
+ if (r && r->region_number == i && !reachable[i])
+ {
+ /* Don't remove ERT_THROW regions if their outer region
+ is reachable. */
+ if (r->type == ERT_THROW
+ && r->outer
+ && reachable[r->outer->region_number])
+ continue;
+
+ remove_eh_handler (r);
+ }
+ }
+
+ free (reachable);
+ free (uid_region_num);
+}
+
/* Turn NOTE_INSN_EH_REGION notes into REG_EH_REGION notes for each
can_throw instruction in the region. */
static void
-convert_from_eh_region_ranges_1 (pinsns, orig_sp, cur)
- rtx *pinsns;
- int *orig_sp;
- int cur;
+convert_from_eh_region_ranges_1 (rtx *pinsns, int *orig_sp, int cur)
{
int *sp = orig_sp;
rtx insn, next;
}
void
-convert_from_eh_region_ranges ()
+convert_from_eh_region_ranges (void)
{
int *stack;
rtx insns;
free (stack);
remove_fixup_regions ();
+ remove_unreachable_regions (insns);
+}
+
+static void
+add_ehl_entry (rtx label, struct eh_region *region)
+{
+ struct ehl_map_entry **slot, *entry;
+
+ LABEL_PRESERVE_P (label) = 1;
+
+ entry = ggc_alloc (sizeof (*entry));
+ entry->label = label;
+ entry->region = region;
+
+ slot = (struct ehl_map_entry **)
+ htab_find_slot (cfun->eh->exception_handler_label_map, entry, INSERT);
+
+ /* Before landing pad creation, each exception handler has its own
+ label. After landing pad creation, the exception handlers may
+ share landing pads. This is ok, since maybe_remove_eh_handler
+ only requires the 1-1 mapping before landing pad creation. */
+ if (*slot && !cfun->eh->built_landing_pads)
+ abort ();
+
+ *slot = entry;
}
void
-find_exception_handler_labels ()
+find_exception_handler_labels (void)
{
- rtx list = NULL_RTX;
int i;
- free_EXPR_LIST_list (&exception_handler_labels);
+ if (cfun->eh->exception_handler_label_map)
+ htab_empty (cfun->eh->exception_handler_label_map);
+ else
+ {
+ /* ??? The expansion factor here (3/2) must be greater than the htab
+ occupancy factor (4/3) to avoid unnecessary resizing. */
+ cfun->eh->exception_handler_label_map
+ = htab_create_ggc (cfun->eh->last_region_number * 3 / 2,
+ ehl_hash, ehl_eq, NULL);
+ }
if (cfun->eh->region_tree == NULL)
return;
struct eh_region *region = cfun->eh->region_array[i];
rtx lab;
- if (! region)
+ if (! region || region->region_number != i)
continue;
if (cfun->eh->built_landing_pads)
lab = region->landing_pad;
lab = region->label;
if (lab)
- list = alloc_EXPR_LIST (0, lab, list);
+ add_ehl_entry (lab, region);
}
/* For sjlj exceptions, need the return label to remain live until
after landing pad generation. */
if (USING_SJLJ_EXCEPTIONS && ! cfun->eh->built_landing_pads)
- list = alloc_EXPR_LIST (0, return_label, list);
-
- exception_handler_labels = list;
+ add_ehl_entry (return_label, NULL);
}
+bool
+current_function_has_exception_handlers (void)
+{
+ int i;
+
+ for (i = cfun->eh->last_region_number; i > 0; --i)
+ {
+ struct eh_region *region = cfun->eh->region_array[i];
+
+ if (! region || region->region_number != i)
+ continue;
+ if (region->type != ERT_THROW)
+ return true;
+ }
+
+ return false;
+}
\f
static struct eh_region *
-duplicate_eh_region_1 (o, map)
- struct eh_region *o;
- struct inline_remap *map;
+duplicate_eh_region_1 (struct eh_region *o, struct inline_remap *map)
{
- struct eh_region *n
- = (struct eh_region *) xcalloc (1, sizeof (struct eh_region));
+ struct eh_region *n = ggc_alloc_cleared (sizeof (struct eh_region));
n->region_number = o->region_number + cfun->eh->last_region_number;
n->type = o->type;
case ERT_THROW:
n->u.throw.type = o->u.throw.type;
-
+
default:
abort ();
}
}
static void
-duplicate_eh_region_2 (o, n_array)
- struct eh_region *o;
- struct eh_region **n_array;
+duplicate_eh_region_2 (struct eh_region *o, struct eh_region **n_array)
{
struct eh_region *n = n_array[o->region_number];
case ERT_CATCH:
if (o->u.catch.next_catch)
- n->u.catch.next_catch = n_array[o->u.catch.next_catch->region_number];
+ n->u.catch.next_catch = n_array[o->u.catch.next_catch->region_number];
if (o->u.catch.prev_catch)
- n->u.catch.prev_catch = n_array[o->u.catch.prev_catch->region_number];
+ n->u.catch.prev_catch = n_array[o->u.catch.prev_catch->region_number];
break;
default:
n->inner = n_array[o->inner->region_number];
if (o->next_peer)
n->next_peer = n_array[o->next_peer->region_number];
-}
+}
int
-duplicate_eh_regions (ifun, map)
- struct function *ifun;
- struct inline_remap *map;
+duplicate_eh_regions (struct function *ifun, struct inline_remap *map)
{
int ifun_last_region_number = ifun->eh->last_region_number;
struct eh_region **n_array, *root, *cur;
\f
static int
-t2r_eq (pentry, pdata)
- const PTR pentry;
- const PTR pdata;
+t2r_eq (const void *pentry, const void *pdata)
{
tree entry = (tree) pentry;
tree data = (tree) pdata;
}
static hashval_t
-t2r_hash (pentry)
- const PTR pentry;
+t2r_hash (const void *pentry)
{
tree entry = (tree) pentry;
return TYPE_HASH (TREE_PURPOSE (entry));
}
-static int
-t2r_mark_1 (slot, data)
- PTR *slot;
- PTR data ATTRIBUTE_UNUSED;
-{
- tree contents = (tree) *slot;
- ggc_mark_tree (contents);
- return 1;
-}
-
-static void
-t2r_mark (addr)
- PTR addr;
-{
- htab_traverse (*(htab_t *)addr, t2r_mark_1, NULL);
-}
-
static void
-add_type_for_runtime (type)
- tree type;
+add_type_for_runtime (tree type)
{
tree *slot;
*slot = tree_cons (type, runtime, NULL_TREE);
}
}
-
+
static tree
-lookup_type_for_runtime (type)
- tree type;
+lookup_type_for_runtime (tree type)
{
tree *slot;
\f
/* Represent an entry in @TTypes for either catch actions
or exception filter actions. */
-struct ttypes_filter
+struct ttypes_filter GTY(())
{
tree t;
int filter;
(a tree) for a @TTypes type node we are thinking about adding. */
static int
-ttypes_filter_eq (pentry, pdata)
- const PTR pentry;
- const PTR pdata;
+ttypes_filter_eq (const void *pentry, const void *pdata)
{
const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
tree data = (tree) pdata;
}
static hashval_t
-ttypes_filter_hash (pentry)
- const PTR pentry;
+ttypes_filter_hash (const void *pentry)
{
const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
return TYPE_HASH (entry->t);
should put these in some canonical order. */
static int
-ehspec_filter_eq (pentry, pdata)
- const PTR pentry;
- const PTR pdata;
+ehspec_filter_eq (const void *pentry, const void *pdata)
{
const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
const struct ttypes_filter *data = (const struct ttypes_filter *) pdata;
/* Hash function for exception specification lists. */
static hashval_t
-ehspec_filter_hash (pentry)
- const PTR pentry;
+ehspec_filter_hash (const void *pentry)
{
const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
hashval_t h = 0;
up the search. Return the filter value to be used. */
static int
-add_ttypes_entry (ttypes_hash, type)
- htab_t ttypes_hash;
- tree type;
+add_ttypes_entry (htab_t ttypes_hash, tree type)
{
struct ttypes_filter **slot, *n;
{
/* Filter value is a 1 based table index. */
- n = (struct ttypes_filter *) xmalloc (sizeof (*n));
+ n = xmalloc (sizeof (*n));
n->t = type;
n->filter = VARRAY_ACTIVE_SIZE (cfun->eh->ttype_data) + 1;
*slot = n;
to speed up the search. Return the filter value to be used. */
static int
-add_ehspec_entry (ehspec_hash, ttypes_hash, list)
- htab_t ehspec_hash;
- htab_t ttypes_hash;
- tree list;
+add_ehspec_entry (htab_t ehspec_hash, htab_t ttypes_hash, tree list)
{
struct ttypes_filter **slot, *n;
struct ttypes_filter dummy;
{
/* Filter value is a -1 based byte index into a uleb128 buffer. */
- n = (struct ttypes_filter *) xmalloc (sizeof (*n));
+ n = xmalloc (sizeof (*n));
n->t = list;
n->filter = -(VARRAY_ACTIVE_SIZE (cfun->eh->ehspec_data) + 1);
*slot = n;
/* Look up each type in the list and encode its filter
value as a uleb128. Terminate the list with 0. */
for (; list ; list = TREE_CHAIN (list))
- push_uleb128 (&cfun->eh->ehspec_data,
+ push_uleb128 (&cfun->eh->ehspec_data,
add_ttypes_entry (ttypes_hash, TREE_VALUE (list)));
VARRAY_PUSH_UCHAR (cfun->eh->ehspec_data, 0);
}
the same filter value, which saves table space. */
static void
-assign_filter_values ()
+assign_filter_values (void)
{
int i;
htab_t ttypes, ehspec;
{
int flt = add_ttypes_entry (ttypes, TREE_VALUE (tp_node));
tree flt_node = build_int_2 (flt, 0);
-
- r->u.catch.filter_list
+
+ r->u.catch.filter_list
= tree_cons (NULL_TREE, flt_node, r->u.catch.filter_list);
}
}
an action record anyway. */
int flt = add_ttypes_entry (ttypes, NULL);
tree flt_node = build_int_2 (flt, 0);
-
- r->u.catch.filter_list
+
+ r->u.catch.filter_list
= tree_cons (NULL_TREE, flt_node, r->u.catch.filter_list);
}
-
+
break;
case ERT_ALLOWED_EXCEPTIONS:
htab_delete (ehspec);
}
+/* Emit SEQ into basic block just before INSN (that is assumed to be
+ first instruction of some existing BB and return the newly
+ produced block. */
+static basic_block
+emit_to_new_bb_before (rtx seq, rtx insn)
+{
+ rtx last;
+ basic_block bb;
+
+ last = emit_insn_before (seq, insn);
+ if (GET_CODE (last) == BARRIER)
+ last = PREV_INSN (last);
+ bb = create_basic_block (seq, last, BLOCK_FOR_INSN (insn)->prev_bb);
+ update_bb_for_insn (bb);
+ bb->flags |= BB_SUPERBLOCK;
+ return bb;
+}
+
+/* Generate the code to actually handle exceptions, which will follow the
+ landing pads. */
+
static void
-build_post_landing_pads ()
+build_post_landing_pads (void)
{
int i;
struct eh_region *c;
for (c = region->u.try.catch; c ; c = c->u.catch.next_catch)
{
- /* ??? _Unwind_ForcedUnwind wants no match here. */
if (c->u.catch.type_list == NULL)
emit_jump (c->label);
else
seq = get_insns ();
end_sequence ();
- emit_insns_before (seq, region->u.try.catch->label);
+ emit_to_new_bb_before (seq, region->u.try.catch->label);
+
break;
case ERT_ALLOWED_EXCEPTIONS:
seq = get_insns ();
end_sequence ();
- emit_insns_before (seq, region->label);
+ emit_to_new_bb_before (seq, region->label);
break;
case ERT_CLEANUP:
_Unwind_Resume otherwise. */
static void
-connect_post_landing_pads ()
+connect_post_landing_pads (void)
{
int i;
struct eh_region *region = cfun->eh->region_array[i];
struct eh_region *outer;
rtx seq;
+ rtx barrier;
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
start_sequence ();
if (outer)
- emit_jump (outer->post_landing_pad);
+ {
+ edge e;
+ basic_block src, dest;
+
+ emit_jump (outer->post_landing_pad);
+ src = BLOCK_FOR_INSN (region->resume);
+ dest = BLOCK_FOR_INSN (outer->post_landing_pad);
+ while (src->succ)
+ remove_edge (src->succ);
+ e = make_edge (src, dest, 0);
+ e->probability = REG_BR_PROB_BASE;
+ e->count = src->count;
+ }
else
emit_library_call (unwind_resume_libfunc, LCT_THROW,
- VOIDmode, 1, cfun->eh->exc_ptr, Pmode);
+ VOIDmode, 1, cfun->eh->exc_ptr, ptr_mode);
seq = get_insns ();
end_sequence ();
- emit_insns_before (seq, region->resume);
+ barrier = emit_insn_before (seq, region->resume);
+ /* Avoid duplicate barrier. */
+ if (GET_CODE (barrier) != BARRIER)
+ abort ();
+ delete_insn (barrier);
delete_insn (region->resume);
}
}
\f
static void
-dw2_build_landing_pads ()
+dw2_build_landing_pads (void)
{
int i;
unsigned int j;
{
struct eh_region *region = cfun->eh->region_array[i];
rtx seq;
+ basic_block bb;
bool clobbers_hard_regs = false;
+ edge e;
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
}
emit_move_insn (cfun->eh->exc_ptr,
- gen_rtx_REG (Pmode, EH_RETURN_DATA_REGNO (0)));
+ gen_rtx_REG (ptr_mode, EH_RETURN_DATA_REGNO (0)));
emit_move_insn (cfun->eh->filter,
gen_rtx_REG (word_mode, EH_RETURN_DATA_REGNO (1)));
seq = get_insns ();
end_sequence ();
- emit_insns_before (seq, region->post_landing_pad);
+ bb = emit_to_new_bb_before (seq, region->post_landing_pad);
+ e = make_edge (bb, bb->next_bb, EDGE_FALLTHRU);
+ e->count = bb->count;
+ e->probability = REG_BR_PROB_BASE;
}
}
};
static bool
-sjlj_find_directly_reachable_regions (lp_info)
- struct sjlj_lp_info *lp_info;
+sjlj_find_directly_reachable_regions (struct sjlj_lp_info *lp_info)
{
rtx insn;
bool found_one = false;
for (insn = get_insns (); insn ; insn = NEXT_INSN (insn))
{
struct eh_region *region;
+ enum reachable_code rc;
tree type_thrown;
rtx note;
/* Find the first containing region that might handle the exception.
That's the landing pad to which we will transfer control. */
+ rc = RNL_NOT_CAUGHT;
for (; region; region = region->outer)
- if (reachable_next_level (region, type_thrown, 0) != RNL_NOT_CAUGHT)
- break;
-
- if (region)
+ {
+ rc = reachable_next_level (region, type_thrown, 0);
+ if (rc != RNL_NOT_CAUGHT)
+ break;
+ }
+ if (rc == RNL_MAYBE_CAUGHT || rc == RNL_CAUGHT)
{
lp_info[region->region_number].directly_reachable = 1;
found_one = true;
}
static void
-sjlj_assign_call_site_values (dispatch_label, lp_info)
- rtx dispatch_label;
- struct sjlj_lp_info *lp_info;
+sjlj_assign_call_site_values (rtx dispatch_label, struct sjlj_lp_info *lp_info)
{
htab_t ar_hash;
int i, index;
index = 0;
for (i = cfun->eh->last_region_number; i > 0; --i)
- if (lp_info[i].directly_reachable
- && lp_info[i].action_index >= 0)
+ if (lp_info[i].directly_reachable)
lp_info[i].dispatch_index = index++;
/* Finally: assign call-site values. If dwarf2 terms, this would be
}
static void
-sjlj_mark_call_sites (lp_info)
- struct sjlj_lp_info *lp_info;
+sjlj_mark_call_sites (struct sjlj_lp_info *lp_info)
{
int last_call_site = -2;
rtx insn, mem;
/* Don't separate a call from it's argument loads. */
before = insn;
if (GET_CODE (insn) == CALL_INSN)
- before = find_first_parameter_load (insn, NULL_RTX);
+ before = find_first_parameter_load (insn, NULL_RTX);
start_sequence ();
mem = adjust_address (cfun->eh->sjlj_fc, TYPE_MODE (integer_type_node),
p = get_insns ();
end_sequence ();
- emit_insns_before (p, before);
+ emit_insn_before (p, before);
last_call_site = this_call_site;
}
}
/* Construct the SjLj_Function_Context. */
static void
-sjlj_emit_function_enter (dispatch_label)
- rtx dispatch_label;
+sjlj_emit_function_enter (rtx dispatch_label)
{
rtx fn_begin, fc, mem, seq;
if (cfun->uses_eh_lsda)
{
char buf[20];
- ASM_GENERATE_INTERNAL_LABEL (buf, "LLSDA", sjlj_funcdef_number);
- emit_move_insn (mem, gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (buf)));
+ rtx sym;
+
+ ASM_GENERATE_INTERNAL_LABEL (buf, "LLSDA", current_function_funcdef_no);
+ sym = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (buf));
+ SYMBOL_REF_FLAGS (sym) = SYMBOL_FLAG_LOCAL;
+ emit_move_insn (mem, sym);
}
else
emit_move_insn (mem, const0_rtx);
-
+
#ifdef DONT_USE_BUILTIN_SETJMP
{
rtx x, note;
plus_constant (XEXP (fc, 0),
sjlj_fc_jbuf_ofs), Pmode);
- note = emit_note (NULL, NOTE_INSN_EXPECTED_VALUE);
+ note = emit_note (NOTE_INSN_EXPECTED_VALUE);
NOTE_EXPECTED_VALUE (note) = gen_rtx_EQ (VOIDmode, x, const0_rtx);
emit_cmp_and_jump_insns (x, const0_rtx, NE, 0,
for (fn_begin = get_insns (); ; fn_begin = NEXT_INSN (fn_begin))
if (GET_CODE (fn_begin) == NOTE
- && NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ && (NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG
+ || NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_BASIC_BLOCK))
break;
- emit_insns_after (seq, fn_begin);
+ if (NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ insert_insn_on_edge (seq, ENTRY_BLOCK_PTR->succ);
+ else
+ {
+ rtx last = BB_END (ENTRY_BLOCK_PTR->succ->dest);
+ for (; ; fn_begin = NEXT_INSN (fn_begin))
+ if ((GET_CODE (fn_begin) == NOTE
+ && NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ || fn_begin == last)
+ break;
+ emit_insn_after (seq, fn_begin);
+ }
}
/* Call back from expand_function_end to know where we should put
the call to unwind_sjlj_unregister_libfunc if needed. */
void
-sjlj_emit_function_exit_after (after)
- rtx after;
+sjlj_emit_function_exit_after (rtx after)
{
cfun->eh->sjlj_exit_after = after;
}
static void
-sjlj_emit_function_exit ()
+sjlj_emit_function_exit (void)
{
rtx seq;
+ edge e;
start_sequence ();
post-dominates all can_throw_internal instructions. This is
the last possible moment. */
- emit_insns_after (seq, cfun->eh->sjlj_exit_after);
+ for (e = EXIT_BLOCK_PTR->pred; e; e = e->pred_next)
+ if (e->flags & EDGE_FALLTHRU)
+ break;
+ if (e)
+ {
+ rtx insn;
+
+ /* Figure out whether the place we are supposed to insert libcall
+ is inside the last basic block or after it. In the other case
+ we need to emit to edge. */
+ if (e->src->next_bb != EXIT_BLOCK_PTR)
+ abort ();
+ for (insn = NEXT_INSN (BB_END (e->src)); insn; insn = NEXT_INSN (insn))
+ if (insn == cfun->eh->sjlj_exit_after)
+ break;
+ if (insn)
+ insert_insn_on_edge (seq, e);
+ else
+ {
+ insn = cfun->eh->sjlj_exit_after;
+ if (GET_CODE (insn) == CODE_LABEL)
+ insn = NEXT_INSN (insn);
+ emit_insn_after (seq, insn);
+ }
+ }
}
static void
-sjlj_emit_dispatch_table (dispatch_label, lp_info)
- rtx dispatch_label;
- struct sjlj_lp_info *lp_info;
+sjlj_emit_dispatch_table (rtx dispatch_label, struct sjlj_lp_info *lp_info)
{
int i, first_reachable;
rtx mem, dispatch, seq, fc;
+ rtx before;
+ basic_block bb;
+ edge e;
fc = cfun->eh->sjlj_fc;
start_sequence ();
emit_label (dispatch_label);
-
+
#ifndef DONT_USE_BUILTIN_SETJMP
expand_builtin_setjmp_receiver (dispatch_label);
#endif
dispatch = copy_to_reg (mem);
mem = adjust_address (fc, word_mode, sjlj_fc_data_ofs);
- if (word_mode != Pmode)
+ if (word_mode != ptr_mode)
{
#ifdef POINTERS_EXTEND_UNSIGNED
- mem = convert_memory_address (Pmode, mem);
+ mem = convert_memory_address (ptr_mode, mem);
#else
- mem = convert_to_mode (Pmode, mem, 0);
+ mem = convert_to_mode (ptr_mode, mem, 0);
#endif
}
emit_move_insn (cfun->eh->exc_ptr, mem);
first_reachable = 0;
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- if (! lp_info[i].directly_reachable
- || lp_info[i].action_index < 0)
+ if (! lp_info[i].directly_reachable)
continue;
if (! first_reachable)
seq = get_insns ();
end_sequence ();
- emit_insns_before (seq, (cfun->eh->region_array[first_reachable]
- ->post_landing_pad));
+ before = cfun->eh->region_array[first_reachable]->post_landing_pad;
+
+ bb = emit_to_new_bb_before (seq, before);
+ e = make_edge (bb, bb->next_bb, EDGE_FALLTHRU);
+ e->count = bb->count;
+ e->probability = REG_BR_PROB_BASE;
}
static void
-sjlj_build_landing_pads ()
+sjlj_build_landing_pads (void)
{
struct sjlj_lp_info *lp_info;
- lp_info = (struct sjlj_lp_info *) xcalloc (cfun->eh->last_region_number + 1,
- sizeof (struct sjlj_lp_info));
+ lp_info = xcalloc (cfun->eh->last_region_number + 1,
+ sizeof (struct sjlj_lp_info));
if (sjlj_find_directly_reachable_regions (lp_info))
{
}
void
-finish_eh_generation ()
+finish_eh_generation (void)
{
+ basic_block bb;
+
/* Nothing to do if no regions created. */
if (cfun->eh->region_tree == NULL)
return;
connect many of the handlers, and then type information will not
be effective. Still, this is a win over previous implementations. */
- rebuild_jump_labels (get_insns ());
- find_basic_blocks (get_insns (), max_reg_num (), 0);
- cleanup_cfg (CLEANUP_PRE_LOOP);
+ cleanup_cfg (CLEANUP_PRE_LOOP | CLEANUP_NO_INSN_DEL);
/* These registers are used by the landing pads. Make sure they
have been generated. */
/* We've totally changed the CFG. Start over. */
find_exception_handler_labels ();
- rebuild_jump_labels (get_insns ());
- find_basic_blocks (get_insns (), max_reg_num (), 0);
- cleanup_cfg (CLEANUP_PRE_LOOP);
+ break_superblocks ();
+ if (USING_SJLJ_EXCEPTIONS)
+ commit_edge_insertions ();
+ FOR_EACH_BB (bb)
+ {
+ edge e, next;
+ bool eh = false;
+ for (e = bb->succ; e; e = next)
+ {
+ next = e->succ_next;
+ if (e->flags & EDGE_EH)
+ {
+ remove_edge (e);
+ eh = true;
+ }
+ }
+ if (eh)
+ make_eh_edge (NULL, bb, BB_END (bb));
+ }
+ cleanup_cfg (CLEANUP_PRE_LOOP | CLEANUP_NO_INSN_DEL);
}
\f
+static hashval_t
+ehl_hash (const void *pentry)
+{
+ struct ehl_map_entry *entry = (struct ehl_map_entry *) pentry;
+
+ /* 2^32 * ((sqrt(5) - 1) / 2) */
+ const hashval_t scaled_golden_ratio = 0x9e3779b9;
+ return CODE_LABEL_NUMBER (entry->label) * scaled_golden_ratio;
+}
+
+static int
+ehl_eq (const void *pentry, const void *pdata)
+{
+ struct ehl_map_entry *entry = (struct ehl_map_entry *) pentry;
+ struct ehl_map_entry *data = (struct ehl_map_entry *) pdata;
+
+ return entry->label == data->label;
+}
+
/* This section handles removing dead code for flow. */
-/* Remove LABEL from the exception_handler_labels list. */
+/* Remove LABEL from exception_handler_label_map. */
static void
-remove_exception_handler_label (label)
- rtx label;
+remove_exception_handler_label (rtx label)
{
- rtx *pl, l;
+ struct ehl_map_entry **slot, tmp;
- for (pl = &exception_handler_labels, l = *pl;
- XEXP (l, 0) != label;
- pl = &XEXP (l, 1), l = *pl)
- continue;
+ /* If exception_handler_label_map was not built yet,
+ there is nothing to do. */
+ if (cfun->eh->exception_handler_label_map == NULL)
+ return;
- *pl = XEXP (l, 1);
- free_EXPR_LIST_node (l);
+ tmp.label = label;
+ slot = (struct ehl_map_entry **)
+ htab_find_slot (cfun->eh->exception_handler_label_map, &tmp, NO_INSERT);
+ if (! slot)
+ abort ();
+
+ htab_clear_slot (cfun->eh->exception_handler_label_map, (void **) slot);
}
/* Splice REGION from the region tree etc. */
static void
-remove_eh_handler (region)
- struct eh_region *region;
+remove_eh_handler (struct eh_region *region)
{
- struct eh_region **pp, *p;
+ struct eh_region **pp, **pp_start, *p, *outer, *inner;
rtx lab;
- int i;
/* For the benefit of efficiently handling REG_EH_REGION notes,
replace this region in the region array with its containing
region. Note that previous region deletions may result in
- multiple copies of this region in the array, so we have to
- search the whole thing. */
- for (i = cfun->eh->last_region_number; i > 0; --i)
- if (cfun->eh->region_array[i] == region)
- cfun->eh->region_array[i] = region->outer;
+ multiple copies of this region in the array, so we have a
+ list of alternate numbers by which we are known. */
+
+ outer = region->outer;
+ cfun->eh->region_array[region->region_number] = outer;
+ if (region->aka)
+ {
+ int i;
+ EXECUTE_IF_SET_IN_BITMAP (region->aka, 0, i,
+ { cfun->eh->region_array[i] = outer; });
+ }
+
+ if (outer)
+ {
+ if (!outer->aka)
+ outer->aka = BITMAP_GGC_ALLOC ();
+ if (region->aka)
+ bitmap_a_or_b (outer->aka, outer->aka, region->aka);
+ bitmap_set_bit (outer->aka, region->region_number);
+ }
if (cfun->eh->built_landing_pads)
lab = region->landing_pad;
if (lab)
remove_exception_handler_label (lab);
- if (region->outer)
- pp = ®ion->outer->inner;
+ if (outer)
+ pp_start = &outer->inner;
else
- pp = &cfun->eh->region_tree;
- for (p = *pp; p != region; pp = &p->next_peer, p = *pp)
+ pp_start = &cfun->eh->region_tree;
+ for (pp = pp_start, p = *pp; p != region; pp = &p->next_peer, p = *pp)
continue;
+ *pp = region->next_peer;
- if (region->inner)
+ inner = region->inner;
+ if (inner)
{
- for (p = region->inner; p->next_peer ; p = p->next_peer)
- p->outer = region->outer;
- p->next_peer = region->next_peer;
- p->outer = region->outer;
- *pp = region->inner;
+ for (p = inner; p->next_peer ; p = p->next_peer)
+ p->outer = outer;
+ p->outer = outer;
+
+ p->next_peer = *pp_start;
+ *pp_start = inner;
}
- else
- *pp = region->next_peer;
if (region->type == ERT_CATCH)
{
remove_eh_handler (try);
}
}
-
- free (region);
}
/* LABEL heads a basic block that is about to be deleted. If this
delete the region. */
void
-maybe_remove_eh_handler (label)
- rtx label;
+maybe_remove_eh_handler (rtx label)
{
- int i;
+ struct ehl_map_entry **slot, tmp;
+ struct eh_region *region;
/* ??? After generating landing pads, it's not so simple to determine
if the region data is completely unused. One must examine the
if (cfun->eh->built_landing_pads)
return;
- for (i = cfun->eh->last_region_number; i > 0; --i)
+ tmp.label = label;
+ slot = (struct ehl_map_entry **)
+ htab_find_slot (cfun->eh->exception_handler_label_map, &tmp, NO_INSERT);
+ if (! slot)
+ return;
+ region = (*slot)->region;
+ if (! region)
+ return;
+
+ /* Flow will want to remove MUST_NOT_THROW regions as unreachable
+ because there is no path to the fallback call to terminate.
+ But the region continues to affect call-site data until there
+ are no more contained calls, which we don't see here. */
+ if (region->type == ERT_MUST_NOT_THROW)
{
- struct eh_region *region = cfun->eh->region_array[i];
- if (region && region->label == label)
- {
- /* Flow will want to remove MUST_NOT_THROW regions as unreachable
- because there is no path to the fallback call to terminate.
- But the region continues to affect call-site data until there
- are no more contained calls, which we don't see here. */
- if (region->type == ERT_MUST_NOT_THROW)
- {
- remove_exception_handler_label (region->label);
- region->label = NULL_RTX;
- }
- else
- remove_eh_handler (region);
- break;
- }
+ htab_clear_slot (cfun->eh->exception_handler_label_map, (void **) slot);
+ region->label = NULL_RTX;
}
+ else
+ remove_eh_handler (region);
}
+/* Invokes CALLBACK for every exception handler label. Only used by old
+ loop hackery; should not be used by new code. */
+
+void
+for_each_eh_label (void (*callback) (rtx))
+{
+ htab_traverse (cfun->eh->exception_handler_label_map, for_each_eh_label_1,
+ (void *) &callback);
+}
+
+static int
+for_each_eh_label_1 (void **pentry, void *data)
+{
+ struct ehl_map_entry *entry = *(struct ehl_map_entry **)pentry;
+ void (*callback) (rtx) = *(void (**) (rtx)) data;
+
+ (*callback) (entry->label);
+ return 1;
+}
\f
/* This section describes CFG exception edges for flow. */
/* For communicating between calls to reachable_next_level. */
-struct reachable_info
+struct reachable_info GTY(())
{
tree types_caught;
tree types_allowed;
base class of TYPE, is in HANDLED. */
static int
-check_handled (handled, type)
- tree handled, type;
+check_handled (tree handled, tree type)
{
tree t;
/* A subroutine of reachable_next_level. If we are collecting a list
of handlers, add one. After landing pad generation, reference
it instead of the handlers themselves. Further, the handlers are
- all wired together, so by referencing one, we've got them all.
+ all wired together, so by referencing one, we've got them all.
Before landing pad generation we reference each handler individually.
LP_REGION contains the landing pad; REGION is the handler. */
static void
-add_reachable_handler (info, lp_region, region)
- struct reachable_info *info;
- struct eh_region *lp_region;
- struct eh_region *region;
+add_reachable_handler (struct reachable_info *info, struct eh_region *lp_region, struct eh_region *region)
{
if (! info)
return;
info->handlers = alloc_INSN_LIST (region->label, info->handlers);
}
-/* Process one level of exception regions for reachability.
+/* Process one level of exception regions for reachability.
If TYPE_THROWN is non-null, then it is the *exact* type being
propagated. If INFO is non-null, then collect handler labels
and caught/allowed type information between invocations. */
static enum reachable_code
-reachable_next_level (region, type_thrown, info)
- struct eh_region *region;
- tree type_thrown;
- struct reachable_info *info;
+reachable_next_level (struct eh_region *region, tree type_thrown,
+ struct reachable_info *info)
{
switch (region->type)
{
for (c = region->u.try.catch; c ; c = c->u.catch.next_catch)
{
/* A catch-all handler ends the search. */
- /* ??? _Unwind_ForcedUnwind will want outer cleanups
- to be run as well. */
if (c->u.catch.type_list == NULL)
{
add_reachable_handler (info, region, c);
if (type_thrown)
{
- /* If we have a at least one type match, end the search. */
+ /* If we have at least one type match, end the search. */
tree tp_node = c->u.catch.type_list;
-
+
for (; tp_node; tp_node = TREE_CHAIN (tp_node))
{
tree type = TREE_VALUE (tp_node);
/* At this point, we either don't know what type is thrown or
don't have front-end assistance to help deciding if it is
covered by one of the types in the list for this region.
-
+
We'd then like to add this region to the list of reachable
handlers since it is indeed potentially reachable based on the
- information we have.
-
+ information we have.
+
Actually, this handler is for sure not reachable if all the
types it matches have already been caught. That is, it is only
potentially reachable if at least one of the types it catches
{
info->types_caught
= tree_cons (NULL, type, info->types_caught);
-
+
maybe_reachable = true;
}
}
-
+
if (maybe_reachable)
{
add_reachable_handler (info, region, c);
-
+
/* ??? If the catch type is a base class of every allowed
type, then we know we can stop the search. */
ret = RNL_MAYBE_CAUGHT;
info->types_allowed = tree_cons (NULL_TREE,
region->u.allowed.type_list,
info->types_allowed);
-
+
/* If we have definitive information about the type hierarchy,
then we can tell if the thrown type will pass through the
filter. */
return RNL_MAYBE_CAUGHT;
case ERT_CATCH:
- /* Catch regions are handled by their controling try region. */
+ /* Catch regions are handled by their controlling try region. */
return RNL_NOT_CAUGHT;
case ERT_MUST_NOT_THROW:
if (info && info->handlers)
{
add_reachable_handler (info, region, region);
- return RNL_CAUGHT;
+ return RNL_CAUGHT;
}
else
return RNL_BLOCKED;
case ERT_THROW:
case ERT_FIXUP:
+ case ERT_UNKNOWN:
/* Shouldn't see these here. */
break;
}
reached by a given insn. */
rtx
-reachable_handlers (insn)
- rtx insn;
+reachable_handlers (rtx insn)
{
struct reachable_info info;
struct eh_region *region;
region = region->outer;
}
- for (; region; region = region->outer)
- if (reachable_next_level (region, type_thrown, &info) >= RNL_CAUGHT)
- break;
+ while (region)
+ {
+ if (reachable_next_level (region, type_thrown, &info) >= RNL_CAUGHT)
+ break;
+ /* If we have processed one cleanup, there is no point in
+ processing any more of them. Each cleanup will have an edge
+ to the next outer cleanup region, so the flow graph will be
+ accurate. */
+ if (region->type == ERT_CLEANUP)
+ region = region->u.cleanup.prev_try;
+ else
+ region = region->outer;
+ }
return info.handlers;
}
within the function. */
bool
-can_throw_internal (insn)
- rtx insn;
+can_throw_internal (rtx insn)
{
struct eh_region *region;
tree type_thrown;
if (how == RNL_BLOCKED)
return false;
if (how != RNL_NOT_CAUGHT)
- return true;
+ return true;
}
return false;
visible outside the function. */
bool
-can_throw_external (insn)
- rtx insn;
+can_throw_external (rtx insn)
{
struct eh_region *region;
tree type_thrown;
return true;
}
-/* True if nothing in this function can throw outside this function. */
+/* Set current_function_nothrow and cfun->all_throwers_are_sibcalls. */
-bool
-nothrow_function_p ()
+void
+set_nothrow_function_flags (void)
{
rtx insn;
+ current_function_nothrow = 1;
+
+ /* Assume cfun->all_throwers_are_sibcalls until we encounter
+ something that can throw an exception. We specifically exempt
+ CALL_INSNs that are SIBLING_CALL_P, as these are really jumps,
+ and can't throw. Most CALL_INSNs are not SIBLING_CALL_P, so this
+ is optimistic. */
+
+ cfun->all_throwers_are_sibcalls = 1;
+
if (! flag_exceptions)
- return true;
+ return;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
if (can_throw_external (insn))
- return false;
+ {
+ current_function_nothrow = 0;
+
+ if (GET_CODE (insn) != CALL_INSN || !SIBLING_CALL_P (insn))
+ {
+ cfun->all_throwers_are_sibcalls = 0;
+ return;
+ }
+ }
+
for (insn = current_function_epilogue_delay_list; insn;
insn = XEXP (insn, 1))
if (can_throw_external (insn))
- return false;
+ {
+ current_function_nothrow = 0;
- return true;
+ if (GET_CODE (insn) != CALL_INSN || !SIBLING_CALL_P (insn))
+ {
+ cfun->all_throwers_are_sibcalls = 0;
+ return;
+ }
+ }
}
\f
On the SPARC, this means flushing the register windows. */
void
-expand_builtin_unwind_init ()
+expand_builtin_unwind_init (void)
{
/* Set this so all the registers get saved in our frame; we need to be
able to copy the saved values for any registers from frames we unwind. */
}
rtx
-expand_builtin_eh_return_data_regno (arglist)
- tree arglist;
+expand_builtin_eh_return_data_regno (tree arglist)
{
tree which = TREE_VALUE (arglist);
unsigned HOST_WIDE_INT iwhich;
iwhich = DBX_REGISTER_NUMBER (iwhich);
#endif
- return GEN_INT (iwhich);
+ return GEN_INT (iwhich);
}
/* Given a value extracted from the return address register or stack slot,
return the actual address encoded in that value. */
rtx
-expand_builtin_extract_return_addr (addr_tree)
- tree addr_tree;
+expand_builtin_extract_return_addr (tree addr_tree)
{
rtx addr = expand_expr (addr_tree, NULL_RTX, Pmode, 0);
+ if (GET_MODE (addr) != Pmode
+ && GET_MODE (addr) != VOIDmode)
+ {
+#ifdef POINTERS_EXTEND_UNSIGNED
+ addr = convert_memory_address (Pmode, addr);
+#else
+ addr = convert_to_mode (Pmode, addr, 0);
+#endif
+ }
+
/* First mask out any unwanted bits. */
#ifdef MASK_RETURN_ADDR
- expand_and (addr, MASK_RETURN_ADDR, addr);
+ expand_and (Pmode, addr, MASK_RETURN_ADDR, addr);
#endif
/* Then adjust to find the real return address. */
stack slot so the epilogue will return to that address. */
rtx
-expand_builtin_frob_return_addr (addr_tree)
- tree addr_tree;
+expand_builtin_frob_return_addr (tree addr_tree)
{
rtx addr = expand_expr (addr_tree, NULL_RTX, ptr_mode, 0);
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (addr) != Pmode)
- addr = convert_memory_address (Pmode, addr);
-#endif
+ addr = convert_memory_address (Pmode, addr);
#ifdef RETURN_ADDR_OFFSET
addr = force_reg (Pmode, addr);
exception handler. */
void
-expand_builtin_eh_return (stackadj_tree, handler_tree)
- tree stackadj_tree, handler_tree;
-{
- rtx stackadj, handler;
-
- stackadj = expand_expr (stackadj_tree, cfun->eh->ehr_stackadj, VOIDmode, 0);
- handler = expand_expr (handler_tree, cfun->eh->ehr_handler, VOIDmode, 0);
-
-#ifdef POINTERS_EXTEND_UNSIGNED
- if (GET_MODE (stackadj) != Pmode)
- stackadj = convert_memory_address (Pmode, stackadj);
-
- if (GET_MODE (handler) != Pmode)
- handler = convert_memory_address (Pmode, handler);
+expand_builtin_eh_return (tree stackadj_tree ATTRIBUTE_UNUSED,
+ tree handler_tree)
+{
+ rtx tmp;
+
+#ifdef EH_RETURN_STACKADJ_RTX
+ tmp = expand_expr (stackadj_tree, cfun->eh->ehr_stackadj, VOIDmode, 0);
+ tmp = convert_memory_address (Pmode, tmp);
+ if (!cfun->eh->ehr_stackadj)
+ cfun->eh->ehr_stackadj = copy_to_reg (tmp);
+ else if (tmp != cfun->eh->ehr_stackadj)
+ emit_move_insn (cfun->eh->ehr_stackadj, tmp);
#endif
- if (! cfun->eh->ehr_label)
- {
- cfun->eh->ehr_stackadj = copy_to_reg (stackadj);
- cfun->eh->ehr_handler = copy_to_reg (handler);
- cfun->eh->ehr_label = gen_label_rtx ();
- }
- else
- {
- if (stackadj != cfun->eh->ehr_stackadj)
- emit_move_insn (cfun->eh->ehr_stackadj, stackadj);
- if (handler != cfun->eh->ehr_handler)
- emit_move_insn (cfun->eh->ehr_handler, handler);
- }
+ tmp = expand_expr (handler_tree, cfun->eh->ehr_handler, VOIDmode, 0);
+ tmp = convert_memory_address (Pmode, tmp);
+ if (!cfun->eh->ehr_handler)
+ cfun->eh->ehr_handler = copy_to_reg (tmp);
+ else if (tmp != cfun->eh->ehr_handler)
+ emit_move_insn (cfun->eh->ehr_handler, tmp);
+ if (!cfun->eh->ehr_label)
+ cfun->eh->ehr_label = gen_label_rtx ();
emit_jump (cfun->eh->ehr_label);
}
void
-expand_eh_return ()
+expand_eh_return (void)
{
- rtx sa, ra, around_label;
+ rtx around_label;
if (! cfun->eh->ehr_label)
return;
- sa = EH_RETURN_STACKADJ_RTX;
- if (! sa)
- {
- error ("__builtin_eh_return not supported on this target");
- return;
- }
-
current_function_calls_eh_return = 1;
+#ifdef EH_RETURN_STACKADJ_RTX
+ emit_move_insn (EH_RETURN_STACKADJ_RTX, const0_rtx);
+#endif
+
around_label = gen_label_rtx ();
- emit_move_insn (sa, const0_rtx);
emit_jump (around_label);
emit_label (cfun->eh->ehr_label);
clobber_return_register ();
+#ifdef EH_RETURN_STACKADJ_RTX
+ emit_move_insn (EH_RETURN_STACKADJ_RTX, cfun->eh->ehr_stackadj);
+#endif
+
#ifdef HAVE_eh_return
if (HAVE_eh_return)
- emit_insn (gen_eh_return (cfun->eh->ehr_stackadj, cfun->eh->ehr_handler));
+ emit_insn (gen_eh_return (cfun->eh->ehr_handler));
else
#endif
{
- ra = EH_RETURN_HANDLER_RTX;
- if (! ra)
- {
- error ("__builtin_eh_return not supported on this target");
- ra = gen_reg_rtx (Pmode);
- }
-
- emit_move_insn (sa, cfun->eh->ehr_stackadj);
- emit_move_insn (ra, cfun->eh->ehr_handler);
+#ifdef EH_RETURN_HANDLER_RTX
+ emit_move_insn (EH_RETURN_HANDLER_RTX, cfun->eh->ehr_handler);
+#else
+ error ("__builtin_eh_return not supported on this target");
+#endif
}
emit_label (around_label);
}
+
+/* Convert a ptr_mode address ADDR_TREE to a Pmode address controlled by
+ POINTERS_EXTEND_UNSIGNED and return it. */
+
+rtx
+expand_builtin_extend_pointer (tree addr_tree)
+{
+ rtx addr = expand_expr (addr_tree, NULL_RTX, ptr_mode, 0);
+ int extend;
+
+#ifdef POINTERS_EXTEND_UNSIGNED
+ extend = POINTERS_EXTEND_UNSIGNED;
+#else
+ /* The previous EH code did an unsigned extend by default, so we do this also
+ for consistency. */
+ extend = 1;
+#endif
+
+ return convert_modes (word_mode, ptr_mode, addr, extend);
+}
\f
/* In the following functions, we represent entries in the action table
as 1-based indices. Special cases are:
};
static int
-action_record_eq (pentry, pdata)
- const PTR pentry;
- const PTR pdata;
+action_record_eq (const void *pentry, const void *pdata)
{
const struct action_record *entry = (const struct action_record *) pentry;
const struct action_record *data = (const struct action_record *) pdata;
}
static hashval_t
-action_record_hash (pentry)
- const PTR pentry;
+action_record_hash (const void *pentry)
{
const struct action_record *entry = (const struct action_record *) pentry;
return entry->next * 1009 + entry->filter;
}
static int
-add_action_record (ar_hash, filter, next)
- htab_t ar_hash;
- int filter, next;
+add_action_record (htab_t ar_hash, int filter, int next)
{
struct action_record **slot, *new, tmp;
if ((new = *slot) == NULL)
{
- new = (struct action_record *) xmalloc (sizeof (*new));
+ new = xmalloc (sizeof (*new));
new->offset = VARRAY_ACTIVE_SIZE (cfun->eh->action_record_data) + 1;
new->filter = filter;
new->next = next;
}
static int
-collect_one_action_chain (ar_hash, region)
- htab_t ar_hash;
- struct eh_region *region;
+collect_one_action_chain (htab_t ar_hash, struct eh_region *region)
{
struct eh_region *c;
int next;
{
/* Retrieve the filter from the head of the filter list
where we have stored it (see assign_filter_values). */
- int filter
+ int filter
= TREE_INT_CST_LOW (TREE_VALUE (c->u.catch.filter_list));
next = add_action_record (ar_hash, filter, 0);
else if (next <= 0)
next = add_action_record (ar_hash, 0, 0);
}
-
+
flt_node = c->u.catch.filter_list;
for (; flt_node; flt_node = TREE_CHAIN (flt_node))
{
}
static int
-add_call_site (landing_pad, action)
- rtx landing_pad;
- int action;
+add_call_site (rtx landing_pad, int action)
{
struct call_site_record *data = cfun->eh->call_site_data;
int used = cfun->eh->call_site_data_used;
if (used >= size)
{
size = (size ? size * 2 : 64);
- data = (struct call_site_record *)
- xrealloc (data, sizeof (*data) * size);
+ data = ggc_realloc (data, sizeof (*data) * size);
cfun->eh->call_site_data = data;
cfun->eh->call_site_data_size = size;
}
instead to call site entries. */
void
-convert_to_eh_region_ranges ()
+convert_to_eh_region_ranges (void)
{
rtx insn, iter, note;
htab_t ar_hash;
are created. */
if (this_action >= -1)
{
- call_site = add_call_site (this_landing_pad,
+ call_site = add_call_site (this_landing_pad,
this_action < 0 ? 0 : this_action);
note = emit_note_before (NOTE_INSN_EH_REGION_BEG, iter);
NOTE_EH_HANDLER (note) = call_site;
\f
static void
-push_uleb128 (data_area, value)
- varray_type *data_area;
- unsigned int value;
+push_uleb128 (varray_type *data_area, unsigned int value)
{
do
{
}
static void
-push_sleb128 (data_area, value)
- varray_type *data_area;
- int value;
+push_sleb128 (varray_type *data_area, int value)
{
unsigned char byte;
int more;
\f
#ifndef HAVE_AS_LEB128
static int
-dw2_size_of_call_site_table ()
+dw2_size_of_call_site_table (void)
{
int n = cfun->eh->call_site_data_used;
int size = n * (4 + 4 + 4);
}
static int
-sjlj_size_of_call_site_table ()
+sjlj_size_of_call_site_table (void)
{
int n = cfun->eh->call_site_data_used;
int size = 0;
#endif
static void
-dw2_output_call_site_table ()
+dw2_output_call_site_table (void)
{
const char *const function_start_lab
= IDENTIFIER_POINTER (current_function_func_begin_label);
}
static void
-sjlj_output_call_site_table ()
+sjlj_output_call_site_table (void)
{
int n = cfun->eh->call_site_data_used;
int i;
call_site_base += n;
}
+/* Tell assembler to switch to the section for the exception handling
+ table. */
+
+void
+default_exception_section (void)
+{
+ if (targetm.have_named_sections)
+ {
+ int flags;
+#ifdef HAVE_LD_RO_RW_SECTION_MIXING
+ int tt_format = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/1);
+
+ flags = (! flag_pic
+ || ((tt_format & 0x70) != DW_EH_PE_absptr
+ && (tt_format & 0x70) != DW_EH_PE_aligned))
+ ? 0 : SECTION_WRITE;
+#else
+ flags = SECTION_WRITE;
+#endif
+ named_section_flags (".gcc_except_table", flags);
+ }
+ else if (flag_pic)
+ data_section ();
+ else
+ readonly_data_section ();
+}
+
void
-output_function_exception_table ()
+output_function_exception_table (void)
{
int tt_format, cs_format, lp_format, i, n;
#ifdef HAVE_AS_LEB128
int call_site_len;
#endif
int have_tt_data;
- int funcdef_number;
int tt_format_size = 0;
/* Not all functions need anything. */
if (! cfun->uses_eh_lsda)
return;
- funcdef_number = (USING_SJLJ_EXCEPTIONS
- ? sjlj_funcdef_number
- : current_funcdef_number);
-
#ifdef IA64_UNWIND_INFO
fputs ("\t.personality\t", asm_out_file);
output_addr_const (asm_out_file, eh_personality_libfunc);
{
tt_format = ASM_PREFERRED_EH_DATA_FORMAT (/*code=*/0, /*global=*/1);
#ifdef HAVE_AS_LEB128
- ASM_GENERATE_INTERNAL_LABEL (ttype_label, "LLSDATT", funcdef_number);
+ ASM_GENERATE_INTERNAL_LABEL (ttype_label, "LLSDATT",
+ current_function_funcdef_no);
#endif
tt_format_size = size_of_encoded_value (tt_format);
assemble_align (tt_format_size * BITS_PER_UNIT);
}
- ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "LLSDA", funcdef_number);
+ (*targetm.asm_out.internal_label) (asm_out_file, "LLSDA",
+ current_function_funcdef_no);
/* The LSDA header. */
{
#ifdef HAVE_AS_LEB128
char ttype_after_disp_label[32];
- ASM_GENERATE_INTERNAL_LABEL (ttype_after_disp_label, "LLSDATTD",
- funcdef_number);
+ ASM_GENERATE_INTERNAL_LABEL (ttype_after_disp_label, "LLSDATTD",
+ current_function_funcdef_no);
dw2_asm_output_delta_uleb128 (ttype_label, ttype_after_disp_label,
"@TType base offset");
ASM_OUTPUT_LABEL (asm_out_file, ttype_after_disp_label);
#ifdef HAVE_AS_LEB128
ASM_GENERATE_INTERNAL_LABEL (cs_after_size_label, "LLSDACSB",
- funcdef_number);
+ current_function_funcdef_no);
ASM_GENERATE_INTERNAL_LABEL (cs_end_label, "LLSDACSE",
- funcdef_number);
+ current_function_funcdef_no);
dw2_asm_output_delta_uleb128 (cs_end_label, cs_after_size_label,
"Call-site table length");
ASM_OUTPUT_LABEL (asm_out_file, cs_after_size_label);
rtx value;
if (type == NULL_TREE)
- type = integer_zero_node;
+ value = const0_rtx;
else
- type = lookup_type_for_runtime (type);
+ {
+ struct cgraph_varpool_node *node;
+
+ type = lookup_type_for_runtime (type);
+ value = expand_expr (type, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);
+
+ /* Let cgraph know that the rtti decl is used. Not all of the
+ paths below go through assemble_integer, which would take
+ care of this for us. */
+ if (TREE_CODE (type) == ADDR_EXPR)
+ {
+ type = TREE_OPERAND (type, 0);
+ node = cgraph_varpool_node (type);
+ if (node)
+ cgraph_varpool_mark_needed_node (node);
+ }
+ else if (TREE_CODE (type) != INTEGER_CST)
+ abort ();
+ }
- value = expand_expr (type, NULL_RTX, VOIDmode, EXPAND_INITIALIZER);
if (tt_format == DW_EH_PE_absptr || tt_format == DW_EH_PE_aligned)
assemble_integer (value, tt_format_size,
tt_format_size * BITS_PER_UNIT, 1);
else
- dw2_asm_output_encoded_addr_rtx (tt_format, value, NULL);
+ dw2_asm_output_encoded_addr_rtx (tt_format, value, NULL);
}
#ifdef HAVE_AS_LEB128
(i ? NULL : "Exception specification table"));
function_section (current_function_decl);
-
- if (USING_SJLJ_EXCEPTIONS)
- sjlj_funcdef_number += 1;
}
+
+#include "gt-except.h"
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