/* Implements exception handling.
Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
This file is part of GCC.
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 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; 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
+<http://www.gnu.org/licenses/>. */
/* An exception is an event that can be signaled from within a
#include "langhooks.h"
#include "cgraph.h"
#include "diagnostic.h"
+#include "tree-pass.h"
+#include "timevar.h"
/* Provide defaults for stuff that may not be defined when using
sjlj exceptions. */
#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) (void);
/* 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,
- ERT_FIXUP
+ ERT_THROW
} type;
/* Holds the action to perform based on the preceding type. */
struct eh_region_u_try {
struct eh_region *catch;
struct eh_region *last_catch;
- struct eh_region *prev_try;
- rtx continue_label;
} GTY ((tag ("ERT_TRY"))) try;
/* The list through the catch handlers, the list of type objects
struct eh_region_u_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 eh_region_u_fixup {
- struct eh_region *real_region;
- bool resolved;
- } GTY ((tag ("ERT_FIXUP"))) fixup;
} 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;
+
struct call_site_record GTY(())
{
rtx landing_pad;
int action;
};
+DEF_VEC_P(eh_region);
+DEF_VEC_ALLOC_P(eh_region, gc);
+
/* Used to save exception status for each function. */
struct eh_status GTY(())
{
struct eh_region *region_tree;
/* The same information as an indexable 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;
-
- rtx filter;
- rtx exc_ptr;
-
- int built_landing_pads;
+ VEC(eh_region,gc) *region_array;
int last_region_number;
- VEC(tree,gc) *ttype_data;
- varray_type ehspec_data;
- varray_type action_record_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;
-
- rtx ehr_stackadj;
- rtx ehr_handler;
- rtx ehr_label;
-
- rtx sjlj_fc;
- rtx sjlj_exit_after;
-
htab_t GTY((param_is (struct throw_stmt_node))) throw_stmt_table;
};
-
\f
static int t2r_eq (const void *, const void *);
static hashval_t t2r_hash (const void *);
cfun->eh = ggc_alloc_cleared (sizeof (struct eh_status));
}
\f
-/* Routines to generate the exception tree somewhat directly.
+/* Routines to generate the exception tree somewhat directly.
These are used from tree-eh.c when processing exception related
nodes during tree optimization. */
expand_resx_expr (tree exp)
{
int region_nr = TREE_INT_CST_LOW (TREE_OPERAND (exp, 0));
- struct eh_region *reg = cfun->eh->region_array[region_nr];
+ struct eh_region *reg = VEC_index (eh_region,
+ cfun->eh->region_array, region_nr);
+ gcc_assert (!reg->resume);
reg->resume = emit_jump_insn (gen_rtx_RESX (VOIDmode, region_nr));
emit_barrier ();
}
}
}
-void
-note_current_region_may_contain_throw (void)
-{
- note_eh_region_may_contain_throw (cfun->eh->cur_region);
-}
-
/* Return an rtl expression for a pointer to the exception object
within a handler. */
rtx
-get_exception_pointer (struct function *fun)
+get_exception_pointer (void)
{
- rtx exc_ptr = fun->eh->exc_ptr;
- if (fun == cfun && ! exc_ptr)
- {
- exc_ptr = gen_reg_rtx (ptr_mode);
- fun->eh->exc_ptr = exc_ptr;
- }
- return exc_ptr;
+ if (! crtl->eh.exc_ptr)
+ crtl->eh.exc_ptr = gen_reg_rtx (ptr_mode);
+ return crtl->eh.exc_ptr;
}
/* Return an rtl expression for the exception dispatch filter
within a handler. */
rtx
-get_exception_filter (struct function *fun)
+get_exception_filter (void)
{
- rtx filter = fun->eh->filter;
- if (fun == cfun && ! filter)
- {
- filter = gen_reg_rtx (targetm.eh_return_filter_mode ());
- fun->eh->filter = filter;
- }
- return filter;
+ if (! crtl->eh.filter)
+ crtl->eh.filter = gen_reg_rtx (targetm.eh_return_filter_mode ());
+ return crtl->eh.filter;
}
\f
/* This section is for the exception handling specific optimization pass. */
void
collect_eh_region_array (void)
{
- struct eh_region **array, *i;
+ struct eh_region *i;
i = cfun->eh->region_tree;
if (! i)
return;
- array = ggc_alloc_cleared ((cfun->eh->last_region_number + 1)
- * sizeof (*array));
- cfun->eh->region_array = array;
+ VEC_safe_grow (eh_region, gc, cfun->eh->region_array,
+ cfun->eh->last_region_number + 1);
+ VEC_replace (eh_region, cfun->eh->region_array, 0, 0);
while (1)
{
- array[i->region_number] = i;
+ VEC_replace (eh_region, cfun->eh->region_array, i->region_number, i);
/* If there are sub-regions, process them. */
if (i->inner)
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- r = cfun->eh->region_array[i];
+ r = VEC_index (eh_region, cfun->eh->region_array, i);
if (!r || r->region_number != i)
continue;
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- r = cfun->eh->region_array[i];
+ r = VEC_index (eh_region, cfun->eh->region_array, i);
if (r && r->region_number == i && !reachable[i])
{
bool kill_it = true;
default:
break;
}
-
+
if (kill_it)
remove_eh_handler (r);
}
we allocated earlier. */
for (i = 1; i <= n; ++i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
+
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
if (region && region->tree_label)
region->label = DECL_RTL_IF_SET (region->tree_label);
}
entry->region = region;
slot = (struct ehl_map_entry **)
- htab_find_slot (cfun->eh->exception_handler_label_map, entry, INSERT);
+ htab_find_slot (crtl->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. */
- gcc_assert (!*slot || cfun->eh->built_landing_pads);
+ gcc_assert (!*slot || crtl->eh.built_landing_pads);
*slot = entry;
}
{
int i;
- if (cfun->eh->exception_handler_label_map)
- htab_empty (cfun->eh->exception_handler_label_map);
+ if (crtl->eh.exception_handler_label_map)
+ htab_empty (crtl->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
+ crtl->eh.exception_handler_label_map
= htab_create_ggc (cfun->eh->last_region_number * 3 / 2,
ehl_hash, ehl_eq, NULL);
}
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
rtx lab;
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
if (! region || region->region_number != i)
continue;
- if (cfun->eh->built_landing_pads)
+ if (crtl->eh.built_landing_pads)
lab = region->landing_pad;
else
lab = region->label;
/* For sjlj exceptions, need the return label to remain live until
after landing pad generation. */
- if (USING_SJLJ_EXCEPTIONS && ! cfun->eh->built_landing_pads)
+ if (USING_SJLJ_EXCEPTIONS && ! crtl->eh.built_landing_pads)
add_ehl_entry (return_label, NULL);
}
+/* Returns true if the current function has exception handling regions. */
+
bool
current_function_has_exception_handlers (void)
{
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
- if (! region || region->region_number != i)
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
+ if (region
+ && region->region_number == i
+ && region->type != ERT_THROW)
+ return true;
+ }
+
+ return false;
+}
+\f
+/* A subroutine of duplicate_eh_regions. Search the region tree under O
+ for the minimum and maximum region numbers. Update *MIN and *MAX. */
+
+static void
+duplicate_eh_regions_0 (eh_region o, int *min, int *max)
+{
+ if (o->region_number < *min)
+ *min = o->region_number;
+ if (o->region_number > *max)
+ *max = o->region_number;
+
+ if (o->inner)
+ {
+ o = o->inner;
+ duplicate_eh_regions_0 (o, min, max);
+ while (o->next_peer)
+ {
+ o = o->next_peer;
+ duplicate_eh_regions_0 (o, min, max);
+ }
+ }
+}
+
+/* A subroutine of duplicate_eh_regions. Copy the region tree under OLD.
+ Root it at OUTER, and apply EH_OFFSET to the region number. Don't worry
+ about the other internal pointers just yet, just the tree-like pointers. */
+
+static eh_region
+duplicate_eh_regions_1 (eh_region old, eh_region outer, int eh_offset)
+{
+ eh_region ret, n;
+
+ ret = n = ggc_alloc (sizeof (struct eh_region));
+
+ *n = *old;
+ n->outer = outer;
+ n->next_peer = NULL;
+ gcc_assert (!old->aka);
+
+ n->region_number += eh_offset;
+ VEC_replace (eh_region, cfun->eh->region_array, n->region_number, n);
+
+ if (old->inner)
+ {
+ old = old->inner;
+ n = n->inner = duplicate_eh_regions_1 (old, ret, eh_offset);
+ while (old->next_peer)
+ {
+ old = old->next_peer;
+ n = n->next_peer = duplicate_eh_regions_1 (old, ret, eh_offset);
+ }
+ }
+
+ return ret;
+}
+
+/* Duplicate the EH regions of IFUN, rooted at COPY_REGION, into current
+ function and root the tree below OUTER_REGION. Remap labels using MAP
+ callback. The special case of COPY_REGION of 0 means all regions. */
+
+int
+duplicate_eh_regions (struct function *ifun, duplicate_eh_regions_map map,
+ void *data, int copy_region, int outer_region)
+{
+ eh_region cur, prev_try, outer, *splice;
+ int i, min_region, max_region, eh_offset, cfun_last_region_number;
+ int num_regions;
+
+ if (!ifun->eh->region_tree)
+ return 0;
+
+ /* Find the range of region numbers to be copied. The interface we
+ provide here mandates a single offset to find new number from old,
+ which means we must look at the numbers present, instead of the
+ count or something else. */
+ if (copy_region > 0)
+ {
+ min_region = INT_MAX;
+ max_region = 0;
+
+ cur = VEC_index (eh_region, ifun->eh->region_array, copy_region);
+ duplicate_eh_regions_0 (cur, &min_region, &max_region);
+ }
+ else
+ min_region = 1, max_region = ifun->eh->last_region_number;
+ num_regions = max_region - min_region + 1;
+ cfun_last_region_number = cfun->eh->last_region_number;
+ eh_offset = cfun_last_region_number + 1 - min_region;
+
+ /* If we've not yet created a region array, do so now. */
+ VEC_safe_grow (eh_region, gc, cfun->eh->region_array,
+ cfun_last_region_number + 1 + num_regions);
+ cfun->eh->last_region_number = max_region + eh_offset;
+
+ /* We may have just allocated the array for the first time.
+ Make sure that element zero is null. */
+ VEC_replace (eh_region, cfun->eh->region_array, 0, 0);
+
+ /* Zero all entries in the range allocated. */
+ memset (VEC_address (eh_region, cfun->eh->region_array)
+ + cfun_last_region_number + 1, 0, num_regions * sizeof (eh_region));
+
+ /* Locate the spot at which to insert the new tree. */
+ if (outer_region > 0)
+ {
+ outer = VEC_index (eh_region, cfun->eh->region_array, outer_region);
+ splice = &outer->inner;
+ }
+ else
+ {
+ outer = NULL;
+ splice = &cfun->eh->region_tree;
+ }
+ while (*splice)
+ splice = &(*splice)->next_peer;
+
+ /* Copy all the regions in the subtree. */
+ if (copy_region > 0)
+ {
+ cur = VEC_index (eh_region, ifun->eh->region_array, copy_region);
+ *splice = duplicate_eh_regions_1 (cur, outer, eh_offset);
+ }
+ else
+ {
+ eh_region n;
+
+ cur = ifun->eh->region_tree;
+ *splice = n = duplicate_eh_regions_1 (cur, outer, eh_offset);
+ while (cur->next_peer)
+ {
+ cur = cur->next_peer;
+ n = n->next_peer = duplicate_eh_regions_1 (cur, outer, eh_offset);
+ }
+ }
+
+ /* Remap all the labels in the new regions. */
+ for (i = cfun_last_region_number + 1;
+ VEC_iterate (eh_region, cfun->eh->region_array, i, cur); ++i)
+ if (cur && cur->tree_label)
+ cur->tree_label = map (cur->tree_label, data);
+
+ /* Search for the containing ERT_TRY region to fix up
+ the prev_try short-cuts for ERT_CLEANUP regions. */
+ prev_try = NULL;
+ if (outer_region > 0)
+ for (prev_try = VEC_index (eh_region, cfun->eh->region_array, outer_region);
+ prev_try && prev_try->type != ERT_TRY;
+ prev_try = prev_try->outer)
+ if (prev_try->type == ERT_MUST_NOT_THROW
+ || (prev_try->type == ERT_ALLOWED_EXCEPTIONS
+ && !prev_try->u.allowed.type_list))
+ {
+ prev_try = NULL;
+ break;
+ }
+
+ /* Remap all of the internal catch and cleanup linkages. Since we
+ duplicate entire subtrees, all of the referenced regions will have
+ been copied too. And since we renumbered them as a block, a simple
+ bit of arithmetic finds us the index for the replacement region. */
+ for (i = cfun_last_region_number + 1;
+ VEC_iterate (eh_region, cfun->eh->region_array, i, cur); ++i)
+ {
+ if (cur == NULL)
continue;
- if (region->type != ERT_THROW)
+
+#define REMAP(REG) \
+ (REG) = VEC_index (eh_region, cfun->eh->region_array, \
+ (REG)->region_number + eh_offset)
+
+ switch (cur->type)
+ {
+ case ERT_TRY:
+ if (cur->u.try.catch)
+ REMAP (cur->u.try.catch);
+ if (cur->u.try.last_catch)
+ REMAP (cur->u.try.last_catch);
+ break;
+
+ case ERT_CATCH:
+ if (cur->u.catch.next_catch)
+ REMAP (cur->u.catch.next_catch);
+ if (cur->u.catch.prev_catch)
+ REMAP (cur->u.catch.prev_catch);
+ break;
+
+ case ERT_CLEANUP:
+ if (cur->u.cleanup.prev_try)
+ REMAP (cur->u.cleanup.prev_try);
+ else
+ cur->u.cleanup.prev_try = prev_try;
+ break;
+
+ default:
+ break;
+ }
+
+#undef REMAP
+ }
+
+ return eh_offset;
+}
+
+/* Return true if REGION_A is outer to REGION_B in IFUN. */
+
+bool
+eh_region_outer_p (struct function *ifun, int region_a, int region_b)
+{
+ struct eh_region *rp_a, *rp_b;
+
+ gcc_assert (ifun->eh->last_region_number > 0);
+ gcc_assert (ifun->eh->region_tree);
+
+ rp_a = VEC_index (eh_region, ifun->eh->region_array, region_a);
+ rp_b = VEC_index (eh_region, ifun->eh->region_array, region_b);
+ gcc_assert (rp_a != NULL);
+ gcc_assert (rp_b != NULL);
+
+ do
+ {
+ if (rp_a == rp_b)
return true;
+ rp_b = rp_b->outer;
}
+ while (rp_b);
return false;
}
+
+/* Return region number of region that is outer to both if REGION_A and
+ REGION_B in IFUN. */
+
+int
+eh_region_outermost (struct function *ifun, int region_a, int region_b)
+{
+ struct eh_region *rp_a, *rp_b;
+ sbitmap b_outer;
+
+ gcc_assert (ifun->eh->last_region_number > 0);
+ gcc_assert (ifun->eh->region_tree);
+
+ rp_a = VEC_index (eh_region, ifun->eh->region_array, region_a);
+ rp_b = VEC_index (eh_region, ifun->eh->region_array, region_b);
+ gcc_assert (rp_a != NULL);
+ gcc_assert (rp_b != NULL);
+
+ b_outer = sbitmap_alloc (ifun->eh->last_region_number + 1);
+ sbitmap_zero (b_outer);
+
+ do
+ {
+ SET_BIT (b_outer, rp_b->region_number);
+ rp_b = rp_b->outer;
+ }
+ while (rp_b);
+
+ do
+ {
+ if (TEST_BIT (b_outer, rp_a->region_number))
+ {
+ sbitmap_free (b_outer);
+ return rp_a->region_number;
+ }
+ rp_a = rp_a->outer;
+ }
+ while (rp_a);
+
+ sbitmap_free (b_outer);
+ return -1;
+}
\f
static int
t2r_eq (const void *pentry, const void *pdata)
{
- tree entry = (tree) pentry;
- tree data = (tree) pdata;
+ const_tree const entry = (const_tree) pentry;
+ const_tree const data = (const_tree) pdata;
return TREE_PURPOSE (entry) == data;
}
static hashval_t
t2r_hash (const void *pentry)
{
- tree entry = (tree) pentry;
+ const_tree const entry = (const_tree) pentry;
return TREE_HASH (TREE_PURPOSE (entry));
}
static int
ttypes_filter_eq (const void *pentry, const void *pdata)
{
- const struct ttypes_filter *entry = (const struct ttypes_filter *) pentry;
- tree data = (tree) pdata;
+ const struct ttypes_filter *const entry
+ = (const struct ttypes_filter *) pentry;
+ const_tree const data = (const_tree) pdata;
return entry->t == data;
}
return h;
}
-/* Add TYPE (which may be NULL) to cfun->eh->ttype_data, using TYPES_HASH
+/* Add TYPE (which may be NULL) to crtl->eh.ttype_data, using TYPES_HASH
to speed up the search. Return the filter value to be used. */
static int
{
/* Filter value is a 1 based table index. */
- n = xmalloc (sizeof (*n));
+ n = XNEW (struct ttypes_filter);
n->t = type;
- n->filter = VEC_length (tree, cfun->eh->ttype_data) + 1;
+ n->filter = VEC_length (tree, crtl->eh.ttype_data) + 1;
*slot = n;
- VEC_safe_push (tree, gc, cfun->eh->ttype_data, type);
+ VEC_safe_push (tree, gc, crtl->eh.ttype_data, type);
}
return n->filter;
}
-/* Add LIST to cfun->eh->ehspec_data, using EHSPEC_HASH and TYPES_HASH
+/* Add LIST to crtl->eh.ehspec_data, using EHSPEC_HASH and TYPES_HASH
to speed up the search. Return the filter value to be used. */
static int
{
/* Filter value is a -1 based byte index into a uleb128 buffer. */
- n = xmalloc (sizeof (*n));
+ n = XNEW (struct ttypes_filter);
n->t = list;
- n->filter = -(VARRAY_ACTIVE_SIZE (cfun->eh->ehspec_data) + 1);
+ n->filter = -(VARRAY_ACTIVE_SIZE (crtl->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. */
+ /* Generate a 0 terminated list of filter values. */
for (; list ; list = TREE_CHAIN (list))
- push_uleb128 (&cfun->eh->ehspec_data,
- add_ttypes_entry (ttypes_hash, TREE_VALUE (list)));
- VARRAY_PUSH_UCHAR (cfun->eh->ehspec_data, 0);
+ {
+ if (targetm.arm_eabi_unwinder)
+ VARRAY_PUSH_TREE (crtl->eh.ehspec_data, TREE_VALUE (list));
+ else
+ {
+ /* Look up each type in the list and encode its filter
+ value as a uleb128. */
+ push_uleb128 (&crtl->eh.ehspec_data,
+ add_ttypes_entry (ttypes_hash, TREE_VALUE (list)));
+ }
+ }
+ if (targetm.arm_eabi_unwinder)
+ VARRAY_PUSH_TREE (crtl->eh.ehspec_data, NULL_TREE);
+ else
+ VARRAY_PUSH_UCHAR (crtl->eh.ehspec_data, 0);
}
return n->filter;
int i;
htab_t ttypes, ehspec;
- cfun->eh->ttype_data = VEC_alloc (tree, gc, 16);
- VARRAY_UCHAR_INIT (cfun->eh->ehspec_data, 64, "ehspec_data");
+ crtl->eh.ttype_data = VEC_alloc (tree, gc, 16);
+ if (targetm.arm_eabi_unwinder)
+ VARRAY_TREE_INIT (crtl->eh.ehspec_data, 64, "ehspec_data");
+ else
+ VARRAY_UCHAR_INIT (crtl->eh.ehspec_data, 64, "ehspec_data");
ttypes = htab_create (31, ttypes_filter_hash, ttypes_filter_eq, free);
ehspec = htab_create (31, ehspec_filter_hash, ehspec_filter_eq, free);
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- struct eh_region *r = cfun->eh->region_array[i];
+ struct eh_region *r;
+
+ r = VEC_index (eh_region, cfun->eh->region_array, i);
/* Mind we don't process a region more than once. */
if (!r || r->region_number != i)
edge_iterator ei;
/* If there happens to be a fallthru edge (possibly created by cleanup_cfg
- call), we don't want it to go into newly created landing pad or other EH
+ call), we don't want it to go into newly created landing pad or other EH
construct. */
for (ei = ei_start (BLOCK_FOR_INSN (insn)->preds); (e = ei_safe_edge (ei)); )
if (e->flags & EDGE_FALLTHRU)
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
rtx seq;
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
continue;
for (; tp_node; )
{
emit_cmp_and_jump_insns
- (cfun->eh->filter,
+ (crtl->eh.filter,
GEN_INT (tree_low_cst (TREE_VALUE (flt_node), 0)),
- EQ, NULL_RTX,
+ EQ, NULL_RTX,
targetm.eh_return_filter_mode (), 0, c->label);
tp_node = TREE_CHAIN (tp_node);
emit_label (region->post_landing_pad);
- emit_cmp_and_jump_insns (cfun->eh->filter,
+ emit_cmp_and_jump_insns (crtl->eh.filter,
GEN_INT (region->u.allowed.filter),
- EQ, NULL_RTX,
+ EQ, NULL_RTX,
targetm.eh_return_filter_mode (), 0, region->label);
/* We delay the generation of the _Unwind_Resume until we generate
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
struct eh_region *outer;
rtx seq;
rtx barrier;
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
continue;
else
{
emit_library_call (unwind_resume_libfunc, LCT_THROW,
- VOIDmode, 1, cfun->eh->exc_ptr, ptr_mode);
+ VOIDmode, 1, crtl->eh.exc_ptr, ptr_mode);
/* What we just emitted was a throwing libcall, so it got a
barrier automatically added after it. If the last insn in
dw2_build_landing_pads (void)
{
int i;
- unsigned int j;
for (i = cfun->eh->last_region_number; i > 0; --i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
rtx seq;
basic_block bb;
- bool clobbers_hard_regs = false;
edge e;
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
/* Mind we don't process a region more than once. */
if (!region || region->region_number != i)
continue;
#endif
{ /* Nothing */ }
- /* If the eh_return data registers are call-saved, then we
- won't have considered them clobbered from the call that
- threw. Kill them now. */
- for (j = 0; ; ++j)
- {
- unsigned r = EH_RETURN_DATA_REGNO (j);
- if (r == INVALID_REGNUM)
- break;
- if (! call_used_regs[r])
- {
- emit_insn (gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (Pmode, r)));
- clobbers_hard_regs = true;
- }
- }
-
- if (clobbers_hard_regs)
- {
- /* @@@ This is a kludge. Not all machine descriptions define a
- blockage insn, but we must not allow the code we just generated
- to be reordered by scheduling. So emit an ASM_INPUT to act as
- blockage insn. */
- emit_insn (gen_rtx_ASM_INPUT (VOIDmode, ""));
- }
-
- emit_move_insn (cfun->eh->exc_ptr,
+ emit_move_insn (crtl->eh.exc_ptr,
gen_rtx_REG (ptr_mode, EH_RETURN_DATA_REGNO (0)));
- emit_move_insn (cfun->eh->filter,
- gen_rtx_REG (targetm.eh_return_filter_mode (),
+ emit_move_insn (crtl->eh.filter,
+ gen_rtx_REG (targetm.eh_return_filter_mode (),
EH_RETURN_DATA_REGNO (1)));
seq = get_insns ();
if (!note || INTVAL (XEXP (note, 0)) <= 0)
continue;
- region = cfun->eh->region_array[INTVAL (XEXP (note, 0))];
+ region = VEC_index (eh_region, cfun->eh->region_array, INTVAL (XEXP (note, 0)));
type_thrown = NULL_TREE;
if (region->type == ERT_THROW)
/* First task: build the action table. */
- VARRAY_UCHAR_INIT (cfun->eh->action_record_data, 64, "action_record_data");
+ VARRAY_UCHAR_INIT (crtl->eh.action_record_data, 64, "action_record_data");
ar_hash = htab_create (31, action_record_hash, action_record_eq, free);
for (i = cfun->eh->last_region_number; i > 0; --i)
if (lp_info[i].directly_reachable)
{
- struct eh_region *r = cfun->eh->region_array[i];
+ struct eh_region *r = VEC_index (eh_region, cfun->eh->region_array, i);
+
r->landing_pad = dispatch_label;
lp_info[i].action_index = collect_one_action_chain (ar_hash, r);
if (lp_info[i].action_index != -1)
- cfun->uses_eh_lsda = 1;
+ crtl->uses_eh_lsda = 1;
}
htab_delete (ar_hash);
if (INTVAL (XEXP (note, 0)) <= 0)
continue;
- region = cfun->eh->region_array[INTVAL (XEXP (note, 0))];
+ region = VEC_index (eh_region, cfun->eh->region_array, INTVAL (XEXP (note, 0)));
this_call_site = lp_info[region->region_number].call_site_index;
}
before = find_first_parameter_load (insn, NULL_RTX);
start_sequence ();
- mem = adjust_address (cfun->eh->sjlj_fc, TYPE_MODE (integer_type_node),
+ mem = adjust_address (crtl->eh.sjlj_fc, TYPE_MODE (integer_type_node),
sjlj_fc_call_site_ofs);
emit_move_insn (mem, GEN_INT (this_call_site));
p = get_insns ();
sjlj_emit_function_enter (rtx dispatch_label)
{
rtx fn_begin, fc, mem, seq;
+ bool fn_begin_outside_block;
- fc = cfun->eh->sjlj_fc;
+ fc = crtl->eh.sjlj_fc;
start_sequence ();
emit_move_insn (mem, eh_personality_libfunc);
mem = adjust_address (fc, Pmode, sjlj_fc_lsda_ofs);
- if (cfun->uses_eh_lsda)
+ if (crtl->uses_eh_lsda)
{
char buf[20];
rtx sym;
#ifdef DONT_USE_BUILTIN_SETJMP
{
- rtx x, note;
+ rtx x;
x = emit_library_call_value (setjmp_libfunc, NULL_RTX, LCT_RETURNS_TWICE,
TYPE_MODE (integer_type_node), 1,
plus_constant (XEXP (fc, 0),
sjlj_fc_jbuf_ofs), Pmode);
- 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,
TYPE_MODE (integer_type_node), 0, dispatch_label);
+ add_reg_br_prob_note (get_insns (), REG_BR_PROB_BASE/100);
}
#else
expand_builtin_setjmp_setup (plus_constant (XEXP (fc, 0), sjlj_fc_jbuf_ofs),
do this in a block that is at loop level 0 and dominates all
can_throw_internal instructions. */
+ fn_begin_outside_block = true;
for (fn_begin = get_insns (); ; fn_begin = NEXT_INSN (fn_begin))
- if (NOTE_P (fn_begin)
- && (NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG
- || NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_BASIC_BLOCK))
- break;
- if (NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ if (NOTE_P (fn_begin))
+ {
+ if (NOTE_KIND (fn_begin) == NOTE_INSN_FUNCTION_BEG)
+ break;
+ else if (NOTE_INSN_BASIC_BLOCK_P (fn_begin))
+ fn_begin_outside_block = false;
+ }
+
+ if (fn_begin_outside_block)
insert_insn_on_edge (seq, single_succ_edge (ENTRY_BLOCK_PTR));
else
- {
- rtx last = BB_END (single_succ (ENTRY_BLOCK_PTR));
- for (; ; fn_begin = NEXT_INSN (fn_begin))
- if ((NOTE_P (fn_begin)
- && NOTE_LINE_NUMBER (fn_begin) == NOTE_INSN_FUNCTION_BEG)
- || fn_begin == last)
- break;
- emit_insn_after (seq, fn_begin);
- }
+ emit_insn_after (seq, fn_begin);
}
/* Call back from expand_function_end to know where we should put
void
sjlj_emit_function_exit_after (rtx after)
{
- cfun->eh->sjlj_exit_after = after;
+ crtl->eh.sjlj_exit_after = after;
}
static void
start_sequence ();
emit_library_call (unwind_sjlj_unregister_libfunc, LCT_NORMAL, VOIDmode,
- 1, XEXP (cfun->eh->sjlj_fc, 0), Pmode);
+ 1, XEXP (crtl->eh.sjlj_fc, 0), Pmode);
seq = get_insns ();
end_sequence ();
gcc_assert (e->src->next_bb == EXIT_BLOCK_PTR);
for (insn = BB_HEAD (e->src); ; insn = NEXT_INSN (insn))
{
- if (insn == cfun->eh->sjlj_exit_after)
+ if (insn == crtl->eh.sjlj_exit_after)
{
if (LABEL_P (insn))
insn = NEXT_INSN (insn);
basic_block bb;
edge e;
- fc = cfun->eh->sjlj_fc;
+ fc = crtl->eh.sjlj_fc;
start_sequence ();
mem = convert_to_mode (ptr_mode, mem, 0);
#endif
}
- emit_move_insn (cfun->eh->exc_ptr, mem);
+ emit_move_insn (crtl->eh.exc_ptr, mem);
mem = adjust_address (fc, word_mode, sjlj_fc_data_ofs + UNITS_PER_WORD);
- emit_move_insn (cfun->eh->filter, mem);
+ emit_move_insn (crtl->eh.filter, mem);
/* Jump to one of the directly reachable regions. */
/* ??? This really ought to be using a switch statement. */
emit_cmp_and_jump_insns (dispatch, GEN_INT (lp_info[i].dispatch_index),
EQ, NULL_RTX, TYPE_MODE (integer_type_node), 0,
- cfun->eh->region_array[i]->post_landing_pad);
+ ((struct eh_region *)VEC_index (eh_region, cfun->eh->region_array, i))
+ ->post_landing_pad);
}
seq = get_insns ();
end_sequence ();
- before = cfun->eh->region_array[first_reachable]->post_landing_pad;
+ before = (((struct eh_region *)VEC_index (eh_region, 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);
{
struct sjlj_lp_info *lp_info;
- lp_info = xcalloc (cfun->eh->last_region_number + 1,
- sizeof (struct sjlj_lp_info));
+ lp_info = XCNEWVEC (struct sjlj_lp_info, cfun->eh->last_region_number + 1);
if (sjlj_find_directly_reachable_regions (lp_info))
{
rtx dispatch_label = gen_label_rtx ();
- cfun->eh->sjlj_fc
+ crtl->eh.sjlj_fc
= assign_stack_local (TYPE_MODE (sjlj_fc_type_node),
int_size_in_bytes (sjlj_fc_type_node),
TYPE_ALIGN (sjlj_fc_type_node));
/* These registers are used by the landing pads. Make sure they
have been generated. */
- get_exception_pointer (cfun);
- get_exception_filter (cfun);
+ get_exception_pointer ();
+ get_exception_filter ();
/* Construct the landing pads. */
else
dw2_build_landing_pads ();
- cfun->eh->built_landing_pads = 1;
+ crtl->eh.built_landing_pads = 1;
/* We've totally changed the CFG. Start over. */
find_exception_handler_labels ();
break_superblocks ();
- if (USING_SJLJ_EXCEPTIONS)
+ if (USING_SJLJ_EXCEPTIONS
+ /* Kludge for Alpha/Tru64 (see alpha_gp_save_rtx). */
+ || single_succ_edge (ENTRY_BLOCK_PTR)->insns.r)
commit_edge_insertions ();
FOR_EACH_BB (bb)
{
static hashval_t
ehl_hash (const void *pentry)
{
- struct ehl_map_entry *entry = (struct ehl_map_entry *) pentry;
+ const struct ehl_map_entry *const entry
+ = (const struct ehl_map_entry *) pentry;
/* 2^32 * ((sqrt(5) - 1) / 2) */
const hashval_t scaled_golden_ratio = 0x9e3779b9;
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;
+ const struct ehl_map_entry *const entry
+ = (const struct ehl_map_entry *) pentry;
+ const struct ehl_map_entry *const data
+ = (const struct ehl_map_entry *) pdata;
return entry->label == data->label;
}
/* If exception_handler_label_map was not built yet,
there is nothing to do. */
- if (cfun->eh->exception_handler_label_map == NULL)
+ if (crtl->eh.exception_handler_label_map == NULL)
return;
tmp.label = label;
slot = (struct ehl_map_entry **)
- htab_find_slot (cfun->eh->exception_handler_label_map, &tmp, NO_INSERT);
+ htab_find_slot (crtl->eh.exception_handler_label_map, &tmp, NO_INSERT);
gcc_assert (slot);
- htab_clear_slot (cfun->eh->exception_handler_label_map, (void **) slot);
+ htab_clear_slot (crtl->eh.exception_handler_label_map, (void **) slot);
}
/* Splice REGION from the region tree etc. */
list of alternate numbers by which we are known. */
outer = region->outer;
- cfun->eh->region_array[region->region_number] = outer;
+ VEC_replace (eh_region, cfun->eh->region_array, region->region_number, outer);
if (region->aka)
{
unsigned i;
EXECUTE_IF_SET_IN_BITMAP (region->aka, 0, i, bi)
{
- cfun->eh->region_array[i] = outer;
+ VEC_replace (eh_region, cfun->eh->region_array, i, outer);
}
}
bitmap_set_bit (outer->aka, region->region_number);
}
- if (cfun->eh->built_landing_pads)
+ if (crtl->eh.built_landing_pads)
lab = region->landing_pad;
else
lab = region->label;
if the region data is completely unused. One must examine the
landing pad and the post landing pad, and whether an inner try block
is referencing the catch handlers directly. */
- if (cfun->eh->built_landing_pads)
+ if (crtl->eh.built_landing_pads)
return;
tmp.label = label;
slot = (struct ehl_map_entry **)
- htab_find_slot (cfun->eh->exception_handler_label_map, &tmp, NO_INSERT);
+ htab_find_slot (crtl->eh.exception_handler_label_map, &tmp, NO_INSERT);
if (! slot)
return;
region = (*slot)->region;
are no more contained calls, which we don't see here. */
if (region->type == ERT_MUST_NOT_THROW)
{
- htab_clear_slot (cfun->eh->exception_handler_label_map, (void **) slot);
+ htab_clear_slot (crtl->eh.exception_handler_label_map, (void **) slot);
region->label = NULL_RTX;
}
else
void
for_each_eh_label (void (*callback) (rtx))
{
- htab_traverse (cfun->eh->exception_handler_label_map, for_each_eh_label_1,
+ htab_traverse (crtl->eh.exception_handler_label_map, for_each_eh_label_1,
(void *) &callback);
}
int i, n = cfun->eh->last_region_number;
for (i = 1; i <= n; ++i)
{
- struct eh_region *region = cfun->eh->region_array[i];
+ struct eh_region *region;
+
+ region = VEC_index (eh_region, cfun->eh->region_array, i);
if (region)
(*callback) (region);
}
info->saw_any_handlers = true;
- if (cfun->eh->built_landing_pads)
+ if (crtl->eh.built_landing_pads)
info->callback (lp_region, info->callback_data);
else
info->callback (region, info->callback_data);
/* Here we end our search, since no exceptions may propagate.
If we've touched down at some landing pad previous, then the
explicit function call we generated may be used. Otherwise
- the call is made by the runtime. */
- if (info && info->saw_any_handlers)
+ the call is made by the runtime.
+
+ Before inlining, do not perform this optimization. We may
+ inline a subroutine that contains handlers, and that will
+ change the value of saw_any_handlers. */
+
+ if ((info && info->saw_any_handlers) || !cfun->after_inlining)
{
add_reachable_handler (info, region, region);
return RNL_CAUGHT;
return RNL_BLOCKED;
case ERT_THROW:
- case ERT_FIXUP:
case ERT_UNKNOWN:
/* Shouldn't see these here. */
gcc_unreachable ();
info.callback = callback;
info.callback_data = callback_data;
- region = cfun->eh->region_array[region_number];
+ region = VEC_index (eh_region, cfun->eh->region_array, region_number);
type_thrown = NULL_TREE;
if (is_resx)
}
foreach_reachable_handler (region_number, is_resx,
- (cfun->eh->built_landing_pads
+ (crtl->eh.built_landing_pads
? arh_to_landing_pad
: arh_to_label),
&handlers);
within the function. */
bool
-can_throw_internal_1 (int region_number)
+can_throw_internal_1 (int region_number, bool is_resx)
{
struct eh_region *region;
tree type_thrown;
- region = cfun->eh->region_array[region_number];
+ region = VEC_index (eh_region, cfun->eh->region_array, region_number);
type_thrown = NULL_TREE;
- if (region->type == ERT_THROW)
+ if (is_resx)
+ region = region->outer;
+ else if (region->type == ERT_THROW)
{
type_thrown = region->u.throw.type;
region = region->outer;
}
bool
-can_throw_internal (rtx insn)
+can_throw_internal (const_rtx insn)
{
rtx note;
if (JUMP_P (insn)
&& GET_CODE (PATTERN (insn)) == RESX
&& XINT (PATTERN (insn), 0) > 0)
- return can_throw_internal_1 (XINT (PATTERN (insn), 0));
+ return can_throw_internal_1 (XINT (PATTERN (insn), 0), true);
if (NONJUMP_INSN_P (insn)
&& GET_CODE (PATTERN (insn)) == SEQUENCE)
if (!note || INTVAL (XEXP (note, 0)) <= 0)
return false;
- return can_throw_internal_1 (INTVAL (XEXP (note, 0)));
+ return can_throw_internal_1 (INTVAL (XEXP (note, 0)), false);
}
/* Determine if the given INSN can throw an exception that is
visible outside the function. */
bool
-can_throw_external_1 (int region_number)
+can_throw_external_1 (int region_number, bool is_resx)
{
struct eh_region *region;
tree type_thrown;
- region = cfun->eh->region_array[region_number];
+ region = VEC_index (eh_region, cfun->eh->region_array, region_number);
type_thrown = NULL_TREE;
- if (region->type == ERT_THROW)
+ if (is_resx)
+ region = region->outer;
+ else if (region->type == ERT_THROW)
{
type_thrown = region->u.throw.type;
region = region->outer;
}
bool
-can_throw_external (rtx insn)
+can_throw_external (const_rtx insn)
{
rtx note;
if (! INSN_P (insn))
return false;
+ if (JUMP_P (insn)
+ && GET_CODE (PATTERN (insn)) == RESX
+ && XINT (PATTERN (insn), 0) > 0)
+ return can_throw_external_1 (XINT (PATTERN (insn), 0), true);
+
if (NONJUMP_INSN_P (insn)
&& GET_CODE (PATTERN (insn)) == SEQUENCE)
insn = XVECEXP (PATTERN (insn), 0, 0);
if (INTVAL (XEXP (note, 0)) <= 0)
return false;
- return can_throw_external_1 (INTVAL (XEXP (note, 0)));
+ return can_throw_external_1 (INTVAL (XEXP (note, 0)), false);
}
-/* Set TREE_NOTHROW and cfun->all_throwers_are_sibcalls. */
+/* Set TREE_NOTHROW and crtl->all_throwers_are_sibcalls. */
-void
+unsigned int
set_nothrow_function_flags (void)
{
rtx insn;
+ /* If we don't know that this implementation of the function will
+ actually be used, then we must not set TREE_NOTHROW, since
+ callers must not assume that this function does not throw. */
+ if (DECL_REPLACEABLE_P (current_function_decl))
+ return 0;
+
TREE_NOTHROW (current_function_decl) = 1;
- /* Assume cfun->all_throwers_are_sibcalls until we encounter
+ /* Assume crtl->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;
+ crtl->all_throwers_are_sibcalls = 1;
if (! flag_exceptions)
- return;
+ return 0;
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
if (can_throw_external (insn))
if (!CALL_P (insn) || !SIBLING_CALL_P (insn))
{
- cfun->all_throwers_are_sibcalls = 0;
- return;
+ crtl->all_throwers_are_sibcalls = 0;
+ return 0;
}
}
- for (insn = current_function_epilogue_delay_list; insn;
+ for (insn = crtl->epilogue_delay_list; insn;
insn = XEXP (insn, 1))
if (can_throw_external (insn))
{
if (!CALL_P (insn) || !SIBLING_CALL_P (insn))
{
- cfun->all_throwers_are_sibcalls = 0;
- return;
+ crtl->all_throwers_are_sibcalls = 0;
+ return 0;
}
}
+ return 0;
}
+struct rtl_opt_pass pass_set_nothrow_function_flags =
+{
+ {
+ RTL_PASS,
+ NULL, /* name */
+ NULL, /* gate */
+ set_nothrow_function_flags, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+ }
+};
+
\f
/* Various hooks for unwind library. */
{
/* 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. */
- current_function_has_nonlocal_label = 1;
+ crtl->saves_all_registers = 1;
#ifdef SETUP_FRAME_ADDRESSES
SETUP_FRAME_ADDRESSES ();
}
rtx
-expand_builtin_eh_return_data_regno (tree arglist)
+expand_builtin_eh_return_data_regno (tree exp)
{
- tree which = TREE_VALUE (arglist);
+ tree which = CALL_EXPR_ARG (exp, 0);
unsigned HOST_WIDE_INT iwhich;
if (TREE_CODE (which) != INTEGER_CST)
rtx
expand_builtin_extract_return_addr (tree addr_tree)
{
- rtx addr = expand_expr (addr_tree, NULL_RTX, Pmode, 0);
+ rtx addr = expand_expr (addr_tree, NULL_RTX, Pmode, EXPAND_NORMAL);
if (GET_MODE (addr) != Pmode
&& GET_MODE (addr) != VOIDmode)
rtx
expand_builtin_frob_return_addr (tree addr_tree)
{
- rtx addr = expand_expr (addr_tree, NULL_RTX, ptr_mode, 0);
+ rtx addr = expand_expr (addr_tree, NULL_RTX, ptr_mode, EXPAND_NORMAL);
addr = convert_memory_address (Pmode, addr);
rtx tmp;
#ifdef EH_RETURN_STACKADJ_RTX
- tmp = expand_expr (stackadj_tree, cfun->eh->ehr_stackadj, VOIDmode, 0);
+ tmp = expand_expr (stackadj_tree, crtl->eh.ehr_stackadj,
+ VOIDmode, EXPAND_NORMAL);
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);
+ if (!crtl->eh.ehr_stackadj)
+ crtl->eh.ehr_stackadj = copy_to_reg (tmp);
+ else if (tmp != crtl->eh.ehr_stackadj)
+ emit_move_insn (crtl->eh.ehr_stackadj, tmp);
#endif
- tmp = expand_expr (handler_tree, cfun->eh->ehr_handler, VOIDmode, 0);
+ tmp = expand_expr (handler_tree, crtl->eh.ehr_handler,
+ VOIDmode, EXPAND_NORMAL);
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 (!crtl->eh.ehr_handler)
+ crtl->eh.ehr_handler = copy_to_reg (tmp);
+ else if (tmp != crtl->eh.ehr_handler)
+ emit_move_insn (crtl->eh.ehr_handler, tmp);
- if (!cfun->eh->ehr_label)
- cfun->eh->ehr_label = gen_label_rtx ();
- emit_jump (cfun->eh->ehr_label);
+ if (!crtl->eh.ehr_label)
+ crtl->eh.ehr_label = gen_label_rtx ();
+ emit_jump (crtl->eh.ehr_label);
}
void
{
rtx around_label;
- if (! cfun->eh->ehr_label)
+ if (! crtl->eh.ehr_label)
return;
- current_function_calls_eh_return = 1;
+ crtl->calls_eh_return = 1;
#ifdef EH_RETURN_STACKADJ_RTX
emit_move_insn (EH_RETURN_STACKADJ_RTX, const0_rtx);
around_label = gen_label_rtx ();
emit_jump (around_label);
- emit_label (cfun->eh->ehr_label);
+ emit_label (crtl->eh.ehr_label);
clobber_return_register ();
#ifdef EH_RETURN_STACKADJ_RTX
- emit_move_insn (EH_RETURN_STACKADJ_RTX, cfun->eh->ehr_stackadj);
+ emit_move_insn (EH_RETURN_STACKADJ_RTX, crtl->eh.ehr_stackadj);
#endif
#ifdef HAVE_eh_return
if (HAVE_eh_return)
- emit_insn (gen_eh_return (cfun->eh->ehr_handler));
+ emit_insn (gen_eh_return (crtl->eh.ehr_handler));
else
#endif
{
#ifdef EH_RETURN_HANDLER_RTX
- emit_move_insn (EH_RETURN_HANDLER_RTX, cfun->eh->ehr_handler);
+ emit_move_insn (EH_RETURN_HANDLER_RTX, crtl->eh.ehr_handler);
#else
error ("__builtin_eh_return not supported on this target");
#endif
rtx
expand_builtin_extend_pointer (tree addr_tree)
{
- rtx addr = expand_expr (addr_tree, NULL_RTX, ptr_mode, 0);
+ rtx addr = expand_expr (addr_tree, NULL_RTX, ptr_mode, EXPAND_NORMAL);
int extend;
#ifdef POINTERS_EXTEND_UNSIGNED
if ((new = *slot) == NULL)
{
new = xmalloc (sizeof (*new));
- new->offset = VARRAY_ACTIVE_SIZE (cfun->eh->action_record_data) + 1;
+ new->offset = VARRAY_ACTIVE_SIZE (crtl->eh.action_record_data) + 1;
new->filter = filter;
new->next = next;
*slot = new;
that there is no next record. So convert the absolute 1 based
indices we've been carrying around into a displacement. */
- push_sleb128 (&cfun->eh->action_record_data, filter);
+ push_sleb128 (&crtl->eh.action_record_data, filter);
if (next)
- next -= VARRAY_ACTIVE_SIZE (cfun->eh->action_record_data) + 1;
- push_sleb128 (&cfun->eh->action_record_data, next);
+ next -= VARRAY_ACTIVE_SIZE (crtl->eh.action_record_data) + 1;
+ push_sleb128 (&crtl->eh.action_record_data, next);
}
return new->offset;
Add a cleanup action to the chain to catch these. */
else if (next <= 0)
next = add_action_record (ar_hash, 0, 0);
-
+
return add_action_record (ar_hash, region->u.allowed.filter, next);
case ERT_MUST_NOT_THROW:
static int
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;
- int size = cfun->eh->call_site_data_size;
+ call_site_record record;
+
+ record = ggc_alloc (sizeof (struct call_site_record));
+ record->landing_pad = landing_pad;
+ record->action = action;
- if (used >= size)
- {
- size = (size ? size * 2 : 64);
- data = ggc_realloc (data, sizeof (*data) * size);
- cfun->eh->call_site_data = data;
- cfun->eh->call_site_data_size = size;
- }
+ VEC_safe_push (call_site_record, gc, crtl->eh.call_site_record, record);
- data[used].landing_pad = landing_pad;
- data[used].action = action;
-
- cfun->eh->call_site_data_used = used + 1;
-
- return used + call_site_base;
+ return call_site_base + VEC_length (call_site_record, crtl->eh.call_site_record) - 1;
}
/* Turn REG_EH_REGION notes back into NOTE_INSN_EH_REGION notes.
The new note numbers will not refer to region numbers, but
instead to call site entries. */
-void
+unsigned int
convert_to_eh_region_ranges (void)
{
rtx insn, iter, note;
int call_site = 0;
if (USING_SJLJ_EXCEPTIONS || cfun->eh->region_tree == NULL)
- return;
+ return 0;
- VARRAY_UCHAR_INIT (cfun->eh->action_record_data, 64, "action_record_data");
+ VARRAY_UCHAR_INIT (crtl->eh.action_record_data, 64, "action_record_data");
ar_hash = htab_create (31, action_record_hash, action_record_eq, free);
{
if (INTVAL (XEXP (note, 0)) <= 0)
continue;
- region = cfun->eh->region_array[INTVAL (XEXP (note, 0))];
+ region = VEC_index (eh_region, cfun->eh->region_array, INTVAL (XEXP (note, 0)));
this_action = collect_one_action_chain (ar_hash, region);
}
/* Existence of catch handlers, or must-not-throw regions
implies that an lsda is needed (even if empty). */
if (this_action != -1)
- cfun->uses_eh_lsda = 1;
+ crtl->uses_eh_lsda = 1;
/* Delay creation of region notes for no-action regions
until we're sure that an lsda will be required. */
}
htab_delete (ar_hash);
+ return 0;
}
+struct rtl_opt_pass pass_convert_to_eh_region_ranges =
+{
+ {
+ RTL_PASS,
+ "eh-ranges", /* name */
+ NULL, /* gate */
+ convert_to_eh_region_ranges, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ 0, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func, /* todo_flags_finish */
+ }
+};
+
\f
static void
push_uleb128 (varray_type *data_area, unsigned int value)
static int
dw2_size_of_call_site_table (void)
{
- int n = cfun->eh->call_site_data_used;
+ int n = VEC_length (call_site_record, crtl->eh.call_site_record);
int size = n * (4 + 4 + 4);
int i;
for (i = 0; i < n; ++i)
{
- struct call_site_record *cs = &cfun->eh->call_site_data[i];
+ struct call_site_record *cs = VEC_index (call_site_record, crtl->eh.call_site_record, i);
size += size_of_uleb128 (cs->action);
}
static int
sjlj_size_of_call_site_table (void)
{
- int n = cfun->eh->call_site_data_used;
+ int n = VEC_length (call_site_record, crtl->eh.call_site_record);
int size = 0;
int i;
for (i = 0; i < n; ++i)
{
- struct call_site_record *cs = &cfun->eh->call_site_data[i];
+ struct call_site_record *cs = VEC_index (call_site_record, crtl->eh.call_site_record, i);
size += size_of_uleb128 (INTVAL (cs->landing_pad));
size += size_of_uleb128 (cs->action);
}
static void
dw2_output_call_site_table (void)
{
- int n = cfun->eh->call_site_data_used;
+ int n = VEC_length (call_site_record, crtl->eh.call_site_record);
int i;
for (i = 0; i < n; ++i)
{
- struct call_site_record *cs = &cfun->eh->call_site_data[i];
+ struct call_site_record *cs = VEC_index (call_site_record, crtl->eh.call_site_record, i);
char reg_start_lab[32];
char reg_end_lab[32];
char landing_pad_lab[32];
static void
sjlj_output_call_site_table (void)
{
- int n = cfun->eh->call_site_data_used;
+ int n = VEC_length (call_site_record, crtl->eh.call_site_record);
int i;
for (i = 0; i < n; ++i)
{
- struct call_site_record *cs = &cfun->eh->call_site_data[i];
+ struct call_site_record *cs = VEC_index (call_site_record, crtl->eh.call_site_record, i);
dw2_asm_output_data_uleb128 (INTVAL (cs->landing_pad),
"region %d landing pad", i);
call_site_base += n;
}
-/* Tell assembler to switch to the section for the exception handling
- table. */
+#ifndef TARGET_UNWIND_INFO
+/* Switch to the section that should be used for exception tables. */
-void
-default_exception_section (void)
+static void
+switch_to_exception_section (const char * ARG_UNUSED (fnname))
+{
+ section *s;
+
+ if (exception_section)
+ s = exception_section;
+ else
+ {
+ /* Compute the section and cache it into exception_section,
+ unless it depends on the function name. */
+ if (targetm.have_named_sections)
+ {
+ int flags;
+
+ if (EH_TABLES_CAN_BE_READ_ONLY)
+ {
+ 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;
+
+#ifdef HAVE_LD_EH_GC_SECTIONS
+ if (flag_function_sections)
+ {
+ char *section_name = xmalloc (strlen (fnname) + 32);
+ sprintf (section_name, ".gcc_except_table.%s", fnname);
+ s = get_section (section_name, flags, NULL);
+ free (section_name);
+ }
+ else
+#endif
+ exception_section
+ = s = get_section (".gcc_except_table", flags, NULL);
+ }
+ else
+ exception_section
+ = s = flag_pic ? data_section : readonly_data_section;
+ }
+
+ switch_to_section (s);
+}
+#endif
+
+
+/* Output a reference from an exception table to the type_info object TYPE.
+ TT_FORMAT and TT_FORMAT_SIZE describe the DWARF encoding method used for
+ the value. */
+
+static void
+output_ttype (tree type, int tt_format, int tt_format_size)
{
- if (targetm.have_named_sections)
+ rtx value;
+ bool public = true;
+
+ if (type == NULL_TREE)
+ value = const0_rtx;
+ else
{
- int flags;
+ struct varpool_node *node;
- if (EH_TABLES_CAN_BE_READ_ONLY)
+ 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. */
+ STRIP_NOPS (type);
+ if (TREE_CODE (type) == ADDR_EXPR)
{
- 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;
+ type = TREE_OPERAND (type, 0);
+ if (TREE_CODE (type) == VAR_DECL)
+ {
+ node = varpool_node (type);
+ if (node)
+ varpool_mark_needed_node (node);
+ public = TREE_PUBLIC (type);
+ }
}
else
- flags = SECTION_WRITE;
- named_section_flags (".gcc_except_table", flags);
+ gcc_assert (TREE_CODE (type) == INTEGER_CST);
}
- else if (flag_pic)
- data_section ();
+
+ /* Allow the target to override the type table entry format. */
+ if (targetm.asm_out.ttype (value))
+ return;
+
+ 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
- readonly_data_section ();
+ dw2_asm_output_encoded_addr_rtx (tt_format, value, public, NULL);
}
void
-output_function_exception_table (void)
+output_function_exception_table (const char * ARG_UNUSED (fnname))
{
int tt_format, cs_format, lp_format, i, n;
#ifdef HAVE_AS_LEB128
int tt_format_size = 0;
/* Not all functions need anything. */
- if (! cfun->uses_eh_lsda)
+ if (! crtl->uses_eh_lsda)
return;
+ if (eh_personality_libfunc)
+ assemble_external_libcall (eh_personality_libfunc);
+
#ifdef TARGET_UNWIND_INFO
/* TODO: Move this into target file. */
- assemble_external_libcall (eh_personality_libfunc);
fputs ("\t.personality\t", asm_out_file);
output_addr_const (asm_out_file, eh_personality_libfunc);
fputs ("\n\t.handlerdata\n", asm_out_file);
/* Note that varasm still thinks we're in the function's code section.
The ".endp" directive that will immediately follow will take us back. */
#else
- targetm.asm_out.exception_section ();
+ switch_to_exception_section (fnname);
#endif
- have_tt_data = (VEC_length (tree, cfun->eh->ttype_data) > 0
- || VARRAY_ACTIVE_SIZE (cfun->eh->ehspec_data) > 0);
+ /* If the target wants a label to begin the table, emit it here. */
+ targetm.asm_out.except_table_label (asm_out_file);
+
+ have_tt_data = (VEC_length (tree, crtl->eh.ttype_data) > 0
+ || VARRAY_ACTIVE_SIZE (crtl->eh.ehspec_data) > 0);
/* Indicate the format of the @TType entries. */
if (! have_tt_data)
before_disp = 1 + 1;
after_disp = (1 + size_of_uleb128 (call_site_len)
+ call_site_len
- + VARRAY_ACTIVE_SIZE (cfun->eh->action_record_data)
- + (VEC_length (tree, cfun->eh->ttype_data)
+ + VARRAY_ACTIVE_SIZE (crtl->eh.action_record_data)
+ + (VEC_length (tree, crtl->eh.ttype_data)
* tt_format_size));
disp = after_disp;
#endif
/* ??? Decode and interpret the data for flag_debug_asm. */
- n = VARRAY_ACTIVE_SIZE (cfun->eh->action_record_data);
+ n = VARRAY_ACTIVE_SIZE (crtl->eh.action_record_data);
for (i = 0; i < n; ++i)
- dw2_asm_output_data (1, VARRAY_UCHAR (cfun->eh->action_record_data, i),
+ dw2_asm_output_data (1, VARRAY_UCHAR (crtl->eh.action_record_data, i),
(i ? NULL : "Action record table"));
if (have_tt_data)
assemble_align (tt_format_size * BITS_PER_UNIT);
- i = VEC_length (tree, cfun->eh->ttype_data);
+ i = VEC_length (tree, crtl->eh.ttype_data);
while (i-- > 0)
{
- tree type = VEC_index (tree, cfun->eh->ttype_data, i);
- rtx value;
-
- if (type == NULL_TREE)
- value = const0_rtx;
- else
- {
- 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. */
- STRIP_NOPS (type);
- if (TREE_CODE (type) == ADDR_EXPR)
- {
- type = TREE_OPERAND (type, 0);
- if (TREE_CODE (type) == VAR_DECL)
- {
- node = cgraph_varpool_node (type);
- if (node)
- cgraph_varpool_mark_needed_node (node);
- }
- }
- else
- gcc_assert (TREE_CODE (type) == INTEGER_CST);
- }
-
- 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);
+ tree type = VEC_index (tree, crtl->eh.ttype_data, i);
+ output_ttype (type, tt_format, tt_format_size);
}
#ifdef HAVE_AS_LEB128
#endif
/* ??? Decode and interpret the data for flag_debug_asm. */
- n = VARRAY_ACTIVE_SIZE (cfun->eh->ehspec_data);
+ n = VARRAY_ACTIVE_SIZE (crtl->eh.ehspec_data);
for (i = 0; i < n; ++i)
- dw2_asm_output_data (1, VARRAY_UCHAR (cfun->eh->ehspec_data, i),
- (i ? NULL : "Exception specification table"));
+ {
+ if (targetm.arm_eabi_unwinder)
+ {
+ tree type = VARRAY_TREE (crtl->eh.ehspec_data, i);
+ output_ttype (type, tt_format, tt_format_size);
+ }
+ else
+ dw2_asm_output_data (1, VARRAY_UCHAR (crtl->eh.ehspec_data, i),
+ (i ? NULL : "Exception specification table"));
+ }
- current_function_section (current_function_decl);
+ switch_to_section (current_function_section ());
}
void
}
/* Dump EH information to OUT. */
-void
+void
dump_eh_tree (FILE *out, struct function *fun)
{
struct eh_region *i;
int depth = 0;
static const char * const type_name[] = {"unknown", "cleanup", "try", "catch",
"allowed_exceptions", "must_not_throw",
- "throw", "fixup"};
+ "throw"};
i = fun->eh->region_tree;
if (! i)
/* Verify some basic invariants on EH datastructures. Could be extended to
catch more. */
-void
+void
verify_eh_tree (struct function *fun)
{
struct eh_region *i, *outer = NULL;
if (! i)
return;
for (j = fun->eh->last_region_number; j > 0; --j)
- if (fun->eh->region_array[j])
+ if ((i = VEC_index (eh_region, cfun->eh->region_array, j)))
{
count++;
- if (fun->eh->region_array[j]->region_number != j)
+ if (i->region_number != j)
{
error ("region_array is corrupted for region %i", i->region_number);
err = true;
while (1)
{
- if (fun->eh->region_array[i->region_number] != i)
+ if (VEC_index (eh_region, cfun->eh->region_array, i->region_number) != i)
{
error ("region_array is corrupted for region %i", i->region_number);
err = true;
{
if (depth != -1)
{
- error ("Tree list ends on depth %i", depth + 1);
+ error ("tree list ends on depth %i", depth + 1);
err = true;
}
if (count != nvisited)
if (err)
{
dump_eh_tree (stderr, fun);
- internal_error ("verify_eh_tree failed.");
+ internal_error ("verify_eh_tree failed");
}
return;
}
}
}
}
+
+/* Initialize unwind_resume_libfunc. */
+
+void
+default_init_unwind_resume_libfunc (void)
+{
+ /* The default c++ routines aren't actually c++ specific, so use those. */
+ unwind_resume_libfunc =
+ init_one_libfunc ( USING_SJLJ_EXCEPTIONS ? "_Unwind_SjLj_Resume"
+ : "_Unwind_Resume");
+}
+
+\f
+static bool
+gate_handle_eh (void)
+{
+ return doing_eh (0);
+}
+
+/* Complete generation of exception handling code. */
+static unsigned int
+rest_of_handle_eh (void)
+{
+ cleanup_cfg (CLEANUP_NO_INSN_DEL);
+ finish_eh_generation ();
+ cleanup_cfg (CLEANUP_NO_INSN_DEL);
+ return 0;
+}
+
+struct rtl_opt_pass pass_rtl_eh =
+{
+ {
+ RTL_PASS,
+ "eh", /* name */
+ gate_handle_eh, /* gate */
+ rest_of_handle_eh, /* execute */
+ NULL, /* sub */
+ NULL, /* next */
+ 0, /* static_pass_number */
+ TV_JUMP, /* tv_id */
+ 0, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ TODO_dump_func /* todo_flags_finish */
+ }
+};
+
#include "gt-except.h"
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