/* Exception handling semantics and decomposition for trees.
- Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2015 Free Software Foundation, Inc.
This file is part of GCC.
#include "system.h"
#include "coretypes.h"
#include "tm.h"
+#include "alias.h"
+#include "symtab.h"
#include "tree.h"
-#include "flags.h"
+#include "fold-const.h"
+#include "hard-reg-set.h"
#include "function.h"
+#include "rtl.h"
+#include "flags.h"
+#include "insn-config.h"
+#include "expmed.h"
+#include "dojump.h"
+#include "explow.h"
+#include "calls.h"
+#include "emit-rtl.h"
+#include "varasm.h"
+#include "stmt.h"
+#include "expr.h"
#include "except.h"
-#include "pointer-set.h"
-#include "tree-flow.h"
-#include "tree-dump.h"
+#include "predict.h"
+#include "dominance.h"
+#include "cfg.h"
+#include "cfganal.h"
+#include "cfgcleanup.h"
+#include "basic-block.h"
+#include "tree-ssa-alias.h"
+#include "internal-fn.h"
+#include "tree-eh.h"
+#include "gimple-expr.h"
+#include "gimple.h"
+#include "gimple-iterator.h"
+#include "gimple-ssa.h"
+#include "cgraph.h"
+#include "tree-cfg.h"
+#include "tree-phinodes.h"
+#include "ssa-iterators.h"
+#include "stringpool.h"
+#include "tree-ssanames.h"
+#include "tree-into-ssa.h"
+#include "tree-ssa.h"
#include "tree-inline.h"
-#include "tree-iterator.h"
#include "tree-pass.h"
-#include "timevar.h"
#include "langhooks.h"
-#include "ggc.h"
#include "diagnostic-core.h"
-#include "gimple.h"
#include "target.h"
#include "cfgloop.h"
+#include "gimple-low.h"
/* In some instances a tree and a gimple need to be stored in a same table,
i.e. in hash tables. This is a structure to do this. */
typedef union {tree *tp; tree t; gimple g;} treemple;
-/* Nonzero if we are using EH to handle cleanups. */
-static int using_eh_for_cleanups_p = 0;
-
-void
-using_eh_for_cleanups (void)
-{
- using_eh_for_cleanups_p = 1;
-}
-
/* Misc functions used in this file. */
/* Remember and lookup EH landing pad data for arbitrary statements.
/* Add statement T in function IFUN to landing pad NUM. */
-void
+static void
add_stmt_to_eh_lp_fn (struct function *ifun, gimple t, int num)
{
- struct throw_stmt_node *n;
- void **slot;
-
gcc_assert (num != 0);
- n = ggc_alloc_throw_stmt_node ();
- n->stmt = t;
- n->lp_nr = num;
-
if (!get_eh_throw_stmt_table (ifun))
- set_eh_throw_stmt_table (ifun, htab_create_ggc (31, struct_ptr_hash,
- struct_ptr_eq,
- ggc_free));
+ set_eh_throw_stmt_table (ifun, hash_map<gimple, int>::create_ggc (31));
- slot = htab_find_slot (get_eh_throw_stmt_table (ifun), n, INSERT);
- gcc_assert (!*slot);
- *slot = n;
+ gcc_assert (!get_eh_throw_stmt_table (ifun)->put (t, num));
}
/* Add statement T in the current function (cfun) to EH landing pad NUM. */
bool
remove_stmt_from_eh_lp_fn (struct function *ifun, gimple t)
{
- struct throw_stmt_node dummy;
- void **slot;
-
if (!get_eh_throw_stmt_table (ifun))
return false;
- dummy.stmt = t;
- slot = htab_find_slot (get_eh_throw_stmt_table (ifun), &dummy,
- NO_INSERT);
- if (slot)
- {
- htab_clear_slot (get_eh_throw_stmt_table (ifun), slot);
- return true;
- }
- else
+ if (!get_eh_throw_stmt_table (ifun)->get (t))
return false;
+
+ get_eh_throw_stmt_table (ifun)->remove (t);
+ return true;
}
int
lookup_stmt_eh_lp_fn (struct function *ifun, gimple t)
{
- struct throw_stmt_node *p, n;
-
if (ifun->eh->throw_stmt_table == NULL)
return 0;
- n.stmt = t;
- p = (struct throw_stmt_node *) htab_find (ifun->eh->throw_stmt_table, &n);
- return p ? p->lp_nr : 0;
+ int *lp_nr = ifun->eh->throw_stmt_table->get (t);
+ return lp_nr ? *lp_nr : 0;
}
/* Likewise, but always use the current function. */
tree) leaves the TRY block, its necessary to record a tree in
this field. Thus a treemple is used. */
treemple child;
- gimple parent;
+ gtry *parent;
+};
+
+/* Hashtable helpers. */
+
+struct finally_tree_hasher : free_ptr_hash <finally_tree_node>
+{
+ static inline hashval_t hash (const finally_tree_node *);
+ static inline bool equal (const finally_tree_node *,
+ const finally_tree_node *);
};
+inline hashval_t
+finally_tree_hasher::hash (const finally_tree_node *v)
+{
+ return (intptr_t)v->child.t >> 4;
+}
+
+inline bool
+finally_tree_hasher::equal (const finally_tree_node *v,
+ const finally_tree_node *c)
+{
+ return v->child.t == c->child.t;
+}
+
/* Note that this table is *not* marked GTY. It is short-lived. */
-static htab_t finally_tree;
+static hash_table<finally_tree_hasher> *finally_tree;
static void
-record_in_finally_tree (treemple child, gimple parent)
+record_in_finally_tree (treemple child, gtry *parent)
{
struct finally_tree_node *n;
- void **slot;
+ finally_tree_node **slot;
n = XNEW (struct finally_tree_node);
n->child = child;
n->parent = parent;
- slot = htab_find_slot (finally_tree, n, INSERT);
+ slot = finally_tree->find_slot (n, INSERT);
gcc_assert (!*slot);
*slot = n;
}
static void
-collect_finally_tree (gimple stmt, gimple region);
+collect_finally_tree (gimple stmt, gtry *region);
/* Go through the gimple sequence. Works with collect_finally_tree to
record all GIMPLE_LABEL and GIMPLE_TRY statements. */
static void
-collect_finally_tree_1 (gimple_seq seq, gimple region)
+collect_finally_tree_1 (gimple_seq seq, gtry *region)
{
gimple_stmt_iterator gsi;
}
static void
-collect_finally_tree (gimple stmt, gimple region)
+collect_finally_tree (gimple stmt, gtry *region)
{
treemple temp;
switch (gimple_code (stmt))
{
case GIMPLE_LABEL:
- temp.t = gimple_label_label (stmt);
+ temp.t = gimple_label_label (as_a <glabel *> (stmt));
record_in_finally_tree (temp, region);
break;
{
temp.g = stmt;
record_in_finally_tree (temp, region);
- collect_finally_tree_1 (gimple_try_eval (stmt), stmt);
+ collect_finally_tree_1 (gimple_try_eval (stmt),
+ as_a <gtry *> (stmt));
collect_finally_tree_1 (gimple_try_cleanup (stmt), region);
}
else if (gimple_try_kind (stmt) == GIMPLE_TRY_CATCH)
break;
case GIMPLE_CATCH:
- collect_finally_tree_1 (gimple_catch_handler (stmt), region);
+ collect_finally_tree_1 (gimple_catch_handler (
+ as_a <gcatch *> (stmt)),
+ region);
break;
case GIMPLE_EH_FILTER:
break;
case GIMPLE_EH_ELSE:
- collect_finally_tree_1 (gimple_eh_else_n_body (stmt), region);
- collect_finally_tree_1 (gimple_eh_else_e_body (stmt), region);
+ {
+ geh_else *eh_else_stmt = as_a <geh_else *> (stmt);
+ collect_finally_tree_1 (gimple_eh_else_n_body (eh_else_stmt), region);
+ collect_finally_tree_1 (gimple_eh_else_e_body (eh_else_stmt), region);
+ }
break;
default:
do
{
n.child = start;
- p = (struct finally_tree_node *) htab_find (finally_tree, &n);
+ p = finally_tree->find (&n);
if (!p)
return true;
start.g = p->parent;
struct goto_queue_node
{
treemple stmt;
+ location_t location;
gimple_seq repl_stmt;
gimple cont_stmt;
int index;
try_finally_expr is the original GIMPLE_TRY_FINALLY. We need to retain
this so that outside_finally_tree can reliably reference the tree used
in the collect_finally_tree data structures. */
- gimple try_finally_expr;
- gimple top_p;
+ gtry *try_finally_expr;
+ gtry *top_p;
/* While lowering a top_p usually it is expanded into multiple statements,
thus we need the following field to store them. */
size_t goto_queue_active;
/* Pointer map to help in searching goto_queue when it is large. */
- struct pointer_map_t *goto_queue_map;
+ hash_map<gimple, goto_queue_node *> *goto_queue_map;
/* The set of unique labels seen as entries in the goto queue. */
- VEC(tree,heap) *dest_array;
+ vec<tree> dest_array;
/* A label to be added at the end of the completed transformed
sequence. It will be set if may_fallthru was true *at one time*,
bool may_throw;
};
-static gimple_seq lower_eh_must_not_throw (struct leh_state *, gimple);
+static gimple_seq lower_eh_must_not_throw (struct leh_state *, gtry *);
/* Search for STMT in the goto queue. Return the replacement,
or null if the statement isn't in the queue. */
#define LARGE_GOTO_QUEUE 20
-static void lower_eh_constructs_1 (struct leh_state *state, gimple_seq seq);
+static void lower_eh_constructs_1 (struct leh_state *state, gimple_seq *seq);
static gimple_seq
find_goto_replacement (struct leh_tf_state *tf, treemple stmt)
{
unsigned int i;
- void **slot;
if (tf->goto_queue_active < LARGE_GOTO_QUEUE)
{
if (!tf->goto_queue_map)
{
- tf->goto_queue_map = pointer_map_create ();
+ tf->goto_queue_map = new hash_map<gimple, goto_queue_node *>;
for (i = 0; i < tf->goto_queue_active; i++)
{
- slot = pointer_map_insert (tf->goto_queue_map,
- tf->goto_queue[i].stmt.g);
- gcc_assert (*slot == NULL);
- *slot = &tf->goto_queue[i];
+ bool existed = tf->goto_queue_map->put (tf->goto_queue[i].stmt.g,
+ &tf->goto_queue[i]);
+ gcc_assert (!existed);
}
}
- slot = pointer_map_contains (tf->goto_queue_map, stmt.g);
+ goto_queue_node **slot = tf->goto_queue_map->get (stmt.g);
if (slot != NULL)
- return (((struct goto_queue_node *) *slot)->repl_stmt);
+ return ((*slot)->repl_stmt);
return NULL;
}
/* The real work of replace_goto_queue. Returns with TSI updated to
point to the next statement. */
-static void replace_goto_queue_stmt_list (gimple_seq, struct leh_tf_state *);
+static void replace_goto_queue_stmt_list (gimple_seq *, struct leh_tf_state *);
static void
replace_goto_queue_1 (gimple stmt, struct leh_tf_state *tf,
break;
case GIMPLE_TRY:
- replace_goto_queue_stmt_list (gimple_try_eval (stmt), tf);
- replace_goto_queue_stmt_list (gimple_try_cleanup (stmt), tf);
+ replace_goto_queue_stmt_list (gimple_try_eval_ptr (stmt), tf);
+ replace_goto_queue_stmt_list (gimple_try_cleanup_ptr (stmt), tf);
break;
case GIMPLE_CATCH:
- replace_goto_queue_stmt_list (gimple_catch_handler (stmt), tf);
+ replace_goto_queue_stmt_list (gimple_catch_handler_ptr (
+ as_a <gcatch *> (stmt)),
+ tf);
break;
case GIMPLE_EH_FILTER:
- replace_goto_queue_stmt_list (gimple_eh_filter_failure (stmt), tf);
+ replace_goto_queue_stmt_list (gimple_eh_filter_failure_ptr (stmt), tf);
break;
case GIMPLE_EH_ELSE:
- replace_goto_queue_stmt_list (gimple_eh_else_n_body (stmt), tf);
- replace_goto_queue_stmt_list (gimple_eh_else_e_body (stmt), tf);
+ {
+ geh_else *eh_else_stmt = as_a <geh_else *> (stmt);
+ replace_goto_queue_stmt_list (gimple_eh_else_n_body_ptr (eh_else_stmt),
+ tf);
+ replace_goto_queue_stmt_list (gimple_eh_else_e_body_ptr (eh_else_stmt),
+ tf);
+ }
break;
default:
/* A subroutine of replace_goto_queue. Handles GIMPLE_SEQ. */
static void
-replace_goto_queue_stmt_list (gimple_seq seq, struct leh_tf_state *tf)
+replace_goto_queue_stmt_list (gimple_seq *seq, struct leh_tf_state *tf)
{
- gimple_stmt_iterator gsi = gsi_start (seq);
+ gimple_stmt_iterator gsi = gsi_start (*seq);
while (!gsi_end_p (gsi))
replace_goto_queue_1 (gsi_stmt (gsi), tf, &gsi);
{
if (tf->goto_queue_active == 0)
return;
- replace_goto_queue_stmt_list (tf->top_p_seq, tf);
- replace_goto_queue_stmt_list (eh_seq, tf);
+ replace_goto_queue_stmt_list (&tf->top_p_seq, tf);
+ replace_goto_queue_stmt_list (&eh_seq, tf);
}
/* Add a new record to the goto queue contained in TF. NEW_STMT is the
record_in_goto_queue (struct leh_tf_state *tf,
treemple new_stmt,
int index,
- bool is_label)
+ bool is_label,
+ location_t location)
{
size_t active, size;
struct goto_queue_node *q;
memset (q, 0, sizeof (*q));
q->stmt = new_stmt;
q->index = index;
+ q->location = location;
q->is_label = is_label;
}
TF is not null. */
static void
-record_in_goto_queue_label (struct leh_tf_state *tf, treemple stmt, tree label)
+record_in_goto_queue_label (struct leh_tf_state *tf, treemple stmt, tree label,
+ location_t location)
{
int index;
treemple temp, new_stmt;
if (!outside_finally_tree (temp, tf->try_finally_expr))
return;
- if (! tf->dest_array)
+ if (! tf->dest_array.exists ())
{
- tf->dest_array = VEC_alloc (tree, heap, 10);
- VEC_quick_push (tree, tf->dest_array, label);
+ tf->dest_array.create (10);
+ tf->dest_array.quick_push (label);
index = 0;
}
else
{
- int n = VEC_length (tree, tf->dest_array);
+ int n = tf->dest_array.length ();
for (index = 0; index < n; ++index)
- if (VEC_index (tree, tf->dest_array, index) == label)
+ if (tf->dest_array[index] == label)
break;
if (index == n)
- VEC_safe_push (tree, heap, tf->dest_array, label);
+ tf->dest_array.safe_push (label);
}
/* In the case of a GOTO we want to record the destination label,
since with a GIMPLE_COND we have an easy access to the then/else
labels. */
new_stmt = stmt;
- record_in_goto_queue (tf, new_stmt, index, true);
+ record_in_goto_queue (tf, new_stmt, index, true, location);
}
/* For any GIMPLE_GOTO or GIMPLE_RETURN, decide whether it leaves a try_finally
switch (gimple_code (stmt))
{
case GIMPLE_COND:
- new_stmt.tp = gimple_op_ptr (stmt, 2);
- record_in_goto_queue_label (tf, new_stmt, gimple_cond_true_label (stmt));
- new_stmt.tp = gimple_op_ptr (stmt, 3);
- record_in_goto_queue_label (tf, new_stmt, gimple_cond_false_label (stmt));
+ {
+ gcond *cond_stmt = as_a <gcond *> (stmt);
+ new_stmt.tp = gimple_op_ptr (cond_stmt, 2);
+ record_in_goto_queue_label (tf, new_stmt,
+ gimple_cond_true_label (cond_stmt),
+ EXPR_LOCATION (*new_stmt.tp));
+ new_stmt.tp = gimple_op_ptr (cond_stmt, 3);
+ record_in_goto_queue_label (tf, new_stmt,
+ gimple_cond_false_label (cond_stmt),
+ EXPR_LOCATION (*new_stmt.tp));
+ }
break;
case GIMPLE_GOTO:
new_stmt.g = stmt;
- record_in_goto_queue_label (tf, new_stmt, gimple_goto_dest (stmt));
+ record_in_goto_queue_label (tf, new_stmt, gimple_goto_dest (stmt),
+ gimple_location (stmt));
break;
case GIMPLE_RETURN:
tf->may_return = true;
new_stmt.g = stmt;
- record_in_goto_queue (tf, new_stmt, -1, false);
+ record_in_goto_queue (tf, new_stmt, -1, false, gimple_location (stmt));
break;
default:
of the labels will leave outer GIMPLE_TRY_FINALLY nodes. Verify this. */
static void
-verify_norecord_switch_expr (struct leh_state *state, gimple switch_expr)
+verify_norecord_switch_expr (struct leh_state *state,
+ gswitch *switch_expr)
{
struct leh_tf_state *tf = state->tf;
size_t i, n;
q->cont_stmt = q->stmt.g;
- if (!q->repl_stmt)
- q->repl_stmt = gimple_seq_alloc ();
-
if (mod)
gimple_seq_add_seq (&q->repl_stmt, mod);
x = gimple_build_goto (finlab);
+ gimple_set_location (x, q->location);
gimple_seq_add_stmt (&q->repl_stmt, x);
}
do_goto_redirection (struct goto_queue_node *q, tree finlab, gimple_seq mod,
struct leh_tf_state *tf)
{
- gimple x;
+ ggoto *x;
gcc_assert (q->is_label);
- if (!q->repl_stmt)
- q->repl_stmt = gimple_seq_alloc ();
- q->cont_stmt = gimple_build_goto (VEC_index (tree, tf->dest_array, q->index));
+ q->cont_stmt = gimple_build_goto (tf->dest_array[q->index]);
if (mod)
gimple_seq_add_seq (&q->repl_stmt, mod);
x = gimple_build_goto (finlab);
+ gimple_set_location (x, q->location);
gimple_seq_add_stmt (&q->repl_stmt, x);
}
emit_post_landing_pad (gimple_seq *seq, eh_region region)
{
eh_landing_pad lp = region->landing_pads;
- gimple x;
+ glabel *x;
if (lp == NULL)
lp = gen_eh_landing_pad (region);
static void
emit_resx (gimple_seq *seq, eh_region region)
{
- gimple x = gimple_build_resx (region->index);
+ gresx *x = gimple_build_resx (region->index);
gimple_seq_add_stmt (seq, x);
if (region->outer)
record_stmt_eh_region (region->outer, x);
static void
emit_eh_dispatch (gimple_seq *seq, eh_region region)
{
- gimple x = gimple_build_eh_dispatch (region->index);
+ geh_dispatch *x = gimple_build_eh_dispatch (region->index);
gimple_seq_add_stmt (seq, x);
}
/* We want to transform
try { body; } catch { stuff; }
to
- normal_seqence:
+ normal_sequence:
body;
over:
- eh_seqence:
+ eh_sequence:
landing_pad:
stuff;
goto over;
an existing label that should be put at the exit, or NULL. */
static gimple_seq
-frob_into_branch_around (gimple tp, eh_region region, tree over)
+frob_into_branch_around (gtry *tp, eh_region region, tree over)
{
gimple x;
gimple_seq cleanup, result;
if (!over)
over = create_artificial_label (loc);
x = gimple_build_goto (over);
+ gimple_set_location (x, loc);
gimple_seq_add_stmt (&cleanup, x);
}
gimple_seq_add_seq (&eh_seq, cleanup);
Make sure to record all new labels found. */
static gimple_seq
-lower_try_finally_dup_block (gimple_seq seq, struct leh_state *outer_state)
+lower_try_finally_dup_block (gimple_seq seq, struct leh_state *outer_state,
+ location_t loc)
{
- gimple region = NULL;
+ gtry *region = NULL;
gimple_seq new_seq;
+ gimple_stmt_iterator gsi;
new_seq = copy_gimple_seq_and_replace_locals (seq);
+ for (gsi = gsi_start (new_seq); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ if (LOCATION_LOCUS (gimple_location (stmt)) == UNKNOWN_LOCATION)
+ {
+ tree block = gimple_block (stmt);
+ gimple_set_location (stmt, loc);
+ gimple_set_block (stmt, block);
+ }
+ }
+
if (outer_state->tf)
region = outer_state->tf->try_finally_expr;
collect_finally_tree_1 (new_seq, region);
/* A subroutine of lower_try_finally. If FINALLY consits of a
GIMPLE_EH_ELSE node, return it. */
-static inline gimple
+static inline geh_else *
get_eh_else (gimple_seq finally)
{
gimple x = gimple_seq_first_stmt (finally);
if (gimple_code (x) == GIMPLE_EH_ELSE)
{
gcc_assert (gimple_seq_singleton_p (finally));
- return x;
+ return as_a <geh_else *> (x);
}
return NULL;
}
gimple_stmt_iterator gsi;
bool finally_may_fallthru;
gimple_seq finally;
- gimple x, eh_else;
+ gimple x;
+ geh_mnt *eh_mnt;
+ gtry *try_stmt;
+ geh_else *eh_else;
/* First check for nothing to do. */
if (lang_hooks.eh_protect_cleanup_actions == NULL)
gimple_try_set_cleanup (tf->top_p, gimple_eh_else_n_body (eh_else));
}
else if (this_state)
- finally = lower_try_finally_dup_block (finally, outer_state);
+ finally = lower_try_finally_dup_block (finally, outer_state,
+ gimple_location (tf->try_finally_expr));
finally_may_fallthru = gimple_seq_may_fallthru (finally);
/* If this cleanup consists of a TRY_CATCH_EXPR with TRY_CATCH_IS_CLEANUP
}
/* Wrap the block with protect_cleanup_actions as the action. */
- x = gimple_build_eh_must_not_throw (protect_cleanup_actions);
- x = gimple_build_try (finally, gimple_seq_alloc_with_stmt (x),
- GIMPLE_TRY_CATCH);
- finally = lower_eh_must_not_throw (outer_state, x);
+ eh_mnt = gimple_build_eh_must_not_throw (protect_cleanup_actions);
+ try_stmt = gimple_build_try (finally, gimple_seq_alloc_with_stmt (eh_mnt),
+ GIMPLE_TRY_CATCH);
+ finally = lower_eh_must_not_throw (outer_state, try_stmt);
/* Drop all of this into the exception sequence. */
emit_post_landing_pad (&eh_seq, tf->region);
struct leh_tf_state *tf)
{
tree lab;
- gimple x, eh_else;
+ gimple x;
+ geh_else *eh_else;
gimple_seq finally;
struct goto_queue_node *q, *qe;
if (eh_else)
{
finally = gimple_eh_else_n_body (eh_else);
- lower_eh_constructs_1 (state, finally);
+ lower_eh_constructs_1 (state, &finally);
gimple_seq_add_seq (&tf->top_p_seq, finally);
if (tf->may_throw)
{
finally = gimple_eh_else_e_body (eh_else);
- lower_eh_constructs_1 (state, finally);
+ lower_eh_constructs_1 (state, &finally);
emit_post_landing_pad (&eh_seq, tf->region);
gimple_seq_add_seq (&eh_seq, finally);
}
else
{
- lower_eh_constructs_1 (state, finally);
+ lower_eh_constructs_1 (state, &finally);
gimple_seq_add_seq (&tf->top_p_seq, finally);
if (tf->may_throw)
emit_post_landing_pad (&eh_seq, tf->region);
x = gimple_build_goto (lab);
+ gimple_set_location (x, gimple_location (tf->try_finally_expr));
gimple_seq_add_stmt (&eh_seq, x);
}
}
lower_try_finally_onedest (struct leh_state *state, struct leh_tf_state *tf)
{
struct goto_queue_node *q, *qe;
+ geh_else *eh_else;
+ glabel *label_stmt;
gimple x;
gimple_seq finally;
+ gimple_stmt_iterator gsi;
tree finally_label;
location_t loc = gimple_location (tf->try_finally_expr);
/* Since there's only one destination, and the destination edge can only
either be EH or non-EH, that implies that all of our incoming edges
are of the same type. Therefore we can lower EH_ELSE immediately. */
- x = get_eh_else (finally);
- if (x)
+ eh_else = get_eh_else (finally);
+ if (eh_else)
{
if (tf->may_throw)
- finally = gimple_eh_else_e_body (x);
+ finally = gimple_eh_else_e_body (eh_else);
else
- finally = gimple_eh_else_n_body (x);
+ finally = gimple_eh_else_n_body (eh_else);
}
- lower_eh_constructs_1 (state, finally);
+ lower_eh_constructs_1 (state, &finally);
+
+ for (gsi = gsi_start (finally); !gsi_end_p (gsi); gsi_next (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ if (LOCATION_LOCUS (gimple_location (stmt)) == UNKNOWN_LOCATION)
+ {
+ tree block = gimple_block (stmt);
+ gimple_set_location (stmt, gimple_location (tf->try_finally_expr));
+ gimple_set_block (stmt, block);
+ }
+ }
if (tf->may_throw)
{
}
finally_label = create_artificial_label (loc);
- x = gimple_build_label (finally_label);
- gimple_seq_add_stmt (&tf->top_p_seq, x);
+ label_stmt = gimple_build_label (finally_label);
+ gimple_seq_add_stmt (&tf->top_p_seq, label_stmt);
gimple_seq_add_seq (&tf->top_p_seq, finally);
do_goto_redirection (q, finally_label, NULL, tf);
replace_goto_queue (tf);
- if (VEC_index (tree, tf->dest_array, 0) == tf->fallthru_label)
+ if (tf->dest_array[0] == tf->fallthru_label)
{
/* Reachable by goto to fallthru label only. Redirect it
to the new label (already created, sadly), and do not
gimple_seq finally;
gimple_seq new_stmt;
gimple_seq seq;
- gimple x, eh_else;
+ gimple x;
+ geh_else *eh_else;
tree tmp;
location_t tf_loc = gimple_location (tf->try_finally_expr);
if (tf->may_fallthru)
{
- seq = lower_try_finally_dup_block (finally, state);
- lower_eh_constructs_1 (state, seq);
+ seq = lower_try_finally_dup_block (finally, state, tf_loc);
+ lower_eh_constructs_1 (state, &seq);
gimple_seq_add_seq (&new_stmt, seq);
tmp = lower_try_finally_fallthru_label (tf);
x = gimple_build_goto (tmp);
+ gimple_set_location (x, tf_loc);
gimple_seq_add_stmt (&new_stmt, x);
}
if (eh_else)
seq = gimple_eh_else_e_body (eh_else);
else
- seq = lower_try_finally_dup_block (finally, state);
- lower_eh_constructs_1 (state, seq);
+ seq = lower_try_finally_dup_block (finally, state, tf_loc);
+ lower_eh_constructs_1 (state, &seq);
emit_post_landing_pad (&eh_seq, tf->region);
gimple_seq_add_seq (&eh_seq, seq);
tree label;
} *labels;
- return_index = VEC_length (tree, tf->dest_array);
+ return_index = tf->dest_array.length ();
labels = XCNEWVEC (struct labels_s, return_index + 1);
q = tf->goto_queue;
x = gimple_build_label (lab);
gimple_seq_add_stmt (&new_stmt, x);
- seq = lower_try_finally_dup_block (finally, state);
- lower_eh_constructs_1 (state, seq);
+ seq = lower_try_finally_dup_block (finally, state, q->location);
+ lower_eh_constructs_1 (state, &seq);
gimple_seq_add_seq (&new_stmt, seq);
gimple_seq_add_stmt (&new_stmt, q->cont_stmt);
int return_index, eh_index, fallthru_index;
int nlabels, ndests, j, last_case_index;
tree last_case;
- VEC (tree,heap) *case_label_vec;
- gimple_seq switch_body;
- gimple x, eh_else;
+ vec<tree> case_label_vec;
+ gimple_seq switch_body = NULL;
+ gimple x;
+ geh_else *eh_else;
tree tmp;
gimple switch_stmt;
gimple_seq finally;
- struct pointer_map_t *cont_map = NULL;
+ hash_map<tree, gimple> *cont_map = NULL;
/* The location of the TRY_FINALLY stmt. */
location_t tf_loc = gimple_location (tf->try_finally_expr);
/* The location of the finally block. */
location_t finally_loc;
- switch_body = gimple_seq_alloc ();
finally = gimple_try_cleanup (tf->top_p);
eh_else = get_eh_else (finally);
/* The location of the finally is either the last stmt in the finally
block or the location of the TRY_FINALLY itself. */
- finally_loc = gimple_seq_last_stmt (tf->top_p_seq) != NULL ?
- gimple_location (gimple_seq_last_stmt (tf->top_p_seq))
- : tf_loc;
-
- /* Lower the finally block itself. */
- lower_eh_constructs_1 (state, finally);
+ x = gimple_seq_last_stmt (finally);
+ finally_loc = x ? gimple_location (x) : tf_loc;
/* Prepare for switch statement generation. */
- nlabels = VEC_length (tree, tf->dest_array);
+ nlabels = tf->dest_array.length ();
return_index = nlabels;
eh_index = return_index + tf->may_return;
fallthru_index = eh_index + (tf->may_throw && !eh_else);
finally_tmp = create_tmp_var (integer_type_node, "finally_tmp");
finally_label = create_artificial_label (finally_loc);
- /* We use VEC_quick_push on case_label_vec throughout this function,
+ /* We use vec::quick_push on case_label_vec throughout this function,
since we know the size in advance and allocate precisely as muce
space as needed. */
- case_label_vec = VEC_alloc (tree, heap, ndests);
+ case_label_vec.create (ndests);
last_case = NULL;
last_case_index = 0;
/* Begin inserting code for getting to the finally block. Things
are done in this order to correspond to the sequence the code is
- layed out. */
+ laid out. */
if (tf->may_fallthru)
{
tmp = build_int_cst (integer_type_node, fallthru_index);
last_case = build_case_label (tmp, NULL,
create_artificial_label (tf_loc));
- VEC_quick_push (tree, case_label_vec, last_case);
+ case_label_vec.quick_push (last_case);
last_case_index++;
x = gimple_build_label (CASE_LABEL (last_case));
tmp = lower_try_finally_fallthru_label (tf);
x = gimple_build_goto (tmp);
+ gimple_set_location (x, tf_loc);
gimple_seq_add_stmt (&switch_body, x);
}
if (tf->may_throw)
{
finally = gimple_eh_else_e_body (eh_else);
- lower_eh_constructs_1 (state, finally);
+ lower_eh_constructs_1 (state, &finally);
emit_post_landing_pad (&eh_seq, tf->region);
gimple_seq_add_seq (&eh_seq, finally);
gimple_seq_add_stmt (&eh_seq, x);
x = gimple_build_goto (finally_label);
+ gimple_set_location (x, tf_loc);
gimple_seq_add_stmt (&eh_seq, x);
tmp = build_int_cst (integer_type_node, eh_index);
last_case = build_case_label (tmp, NULL,
create_artificial_label (tf_loc));
- VEC_quick_push (tree, case_label_vec, last_case);
+ case_label_vec.quick_push (last_case);
last_case_index++;
x = gimple_build_label (CASE_LABEL (last_case));
x = gimple_build_label (finally_label);
gimple_seq_add_stmt (&tf->top_p_seq, x);
+ lower_eh_constructs_1 (state, &finally);
gimple_seq_add_seq (&tf->top_p_seq, finally);
/* Redirect each incoming goto edge. */
entrance through a particular edge. */
for (; q < qe; ++q)
{
- gimple_seq mod;
+ gimple_seq mod = NULL;
int switch_id;
unsigned int case_index;
- mod = gimple_seq_alloc ();
-
if (q->index < 0)
{
x = gimple_build_assign (finally_tmp,
}
case_index = j + q->index;
- if (VEC_length (tree, case_label_vec) <= case_index
- || !VEC_index (tree, case_label_vec, case_index))
+ if (case_label_vec.length () <= case_index || !case_label_vec[case_index])
{
tree case_lab;
- void **slot;
tmp = build_int_cst (integer_type_node, switch_id);
case_lab = build_case_label (tmp, NULL,
create_artificial_label (tf_loc));
/* We store the cont_stmt in the pointer map, so that we can recover
it in the loop below. */
if (!cont_map)
- cont_map = pointer_map_create ();
- slot = pointer_map_insert (cont_map, case_lab);
- *slot = q->cont_stmt;
- VEC_quick_push (tree, case_label_vec, case_lab);
+ cont_map = new hash_map<tree, gimple>;
+ cont_map->put (case_lab, q->cont_stmt);
+ case_label_vec.quick_push (case_lab);
}
}
for (j = last_case_index; j < last_case_index + nlabels; j++)
{
gimple cont_stmt;
- void **slot;
- last_case = VEC_index (tree, case_label_vec, j);
+ last_case = case_label_vec[j];
gcc_assert (last_case);
gcc_assert (cont_map);
- slot = pointer_map_contains (cont_map, last_case);
- gcc_assert (slot);
- cont_stmt = *(gimple *) slot;
+ cont_stmt = *cont_map->get (last_case);
x = gimple_build_label (CASE_LABEL (last_case));
gimple_seq_add_stmt (&switch_body, x);
maybe_record_in_goto_queue (state, cont_stmt);
}
if (cont_map)
- pointer_map_destroy (cont_map);
+ delete cont_map;
replace_goto_queue (tf);
/* Make sure that the last case is the default label, as one is required.
Then sort the labels, which is also required in GIMPLE. */
CASE_LOW (last_case) = NULL;
+ tree tem = case_label_vec.pop ();
+ gcc_assert (tem == last_case);
sort_case_labels (case_label_vec);
/* Build the switch statement, setting last_case to be the default
label. */
- switch_stmt = gimple_build_switch_vec (finally_tmp, last_case,
- case_label_vec);
+ switch_stmt = gimple_build_switch (finally_tmp, last_case,
+ case_label_vec);
gimple_set_location (switch_stmt, finally_loc);
/* Need to link SWITCH_STMT after running replace_goto_queue
decide_copy_try_finally (int ndests, bool may_throw, gimple_seq finally)
{
int f_estimate, sw_estimate;
- gimple eh_else;
+ geh_else *eh_else;
/* If there's an EH_ELSE involved, the exception path is separate
and really doesn't come into play for this computation. */
arrange for the FINALLY block to be executed on all exits. */
static gimple_seq
-lower_try_finally (struct leh_state *state, gimple tp)
+lower_try_finally (struct leh_state *state, gtry *tp)
{
struct leh_tf_state this_tf;
struct leh_state this_state;
this_tf.try_finally_expr = tp;
this_tf.top_p = tp;
this_tf.outer = state;
- if (using_eh_for_cleanups_p && !cleanup_is_dead_in (state->cur_region))
+ if (using_eh_for_cleanups_p () && !cleanup_is_dead_in (state->cur_region))
{
this_tf.region = gen_eh_region_cleanup (state->cur_region);
this_state.cur_region = this_tf.region;
old_eh_seq = eh_seq;
eh_seq = NULL;
- lower_eh_constructs_1 (&this_state, gimple_try_eval(tp));
+ lower_eh_constructs_1 (&this_state, gimple_try_eval_ptr (tp));
/* Determine if the try block is escaped through the bottom. */
this_tf.may_fallthru = gimple_seq_may_fallthru (gimple_try_eval (tp));
how many destinations are reached by the finally block. Use this to
determine how we process the finally block itself. */
- ndests = VEC_length (tree, this_tf.dest_array);
+ ndests = this_tf.dest_array.length ();
ndests += this_tf.may_fallthru;
ndests += this_tf.may_return;
ndests += this_tf.may_throw;
gimple_seq_add_stmt (&this_tf.top_p_seq, x);
}
- VEC_free (tree, heap, this_tf.dest_array);
+ this_tf.dest_array.release ();
free (this_tf.goto_queue);
if (this_tf.goto_queue_map)
- pointer_map_destroy (this_tf.goto_queue_map);
+ delete this_tf.goto_queue_map;
/* If there was an old (aka outer) eh_seq, append the current eh_seq.
If there was no old eh_seq, then the append is trivially already done. */
{
gimple_seq new_eh_seq = eh_seq;
eh_seq = old_eh_seq;
- gimple_seq_add_seq(&eh_seq, new_eh_seq);
+ gimple_seq_add_seq (&eh_seq, new_eh_seq);
}
}
exception region trees that records all the magic. */
static gimple_seq
-lower_catch (struct leh_state *state, gimple tp)
+lower_catch (struct leh_state *state, gtry *tp)
{
eh_region try_region = NULL;
struct leh_state this_state = *state;
gimple_stmt_iterator gsi;
tree out_label;
- gimple_seq new_seq;
+ gimple_seq new_seq, cleanup;
gimple x;
location_t try_catch_loc = gimple_location (tp);
this_state.cur_region = try_region;
}
- lower_eh_constructs_1 (&this_state, gimple_try_eval (tp));
+ lower_eh_constructs_1 (&this_state, gimple_try_eval_ptr (tp));
if (!eh_region_may_contain_throw (try_region))
return gimple_try_eval (tp);
this_state.cur_region = state->cur_region;
this_state.ehp_region = try_region;
+ /* Add eh_seq from lowering EH in the cleanup sequence after the cleanup
+ itself, so that e.g. for coverage purposes the nested cleanups don't
+ appear before the cleanup body. See PR64634 for details. */
+ gimple_seq old_eh_seq = eh_seq;
+ eh_seq = NULL;
+
out_label = NULL;
- for (gsi = gsi_start (gimple_try_cleanup (tp));
+ cleanup = gimple_try_cleanup (tp);
+ for (gsi = gsi_start (cleanup);
!gsi_end_p (gsi);
gsi_next (&gsi))
{
eh_catch c;
- gimple gcatch;
+ gcatch *catch_stmt;
gimple_seq handler;
- gcatch = gsi_stmt (gsi);
- c = gen_eh_region_catch (try_region, gimple_catch_types (gcatch));
+ catch_stmt = as_a <gcatch *> (gsi_stmt (gsi));
+ c = gen_eh_region_catch (try_region, gimple_catch_types (catch_stmt));
- handler = gimple_catch_handler (gcatch);
- lower_eh_constructs_1 (&this_state, handler);
+ handler = gimple_catch_handler (catch_stmt);
+ lower_eh_constructs_1 (&this_state, &handler);
c->label = create_artificial_label (UNKNOWN_LOCATION);
x = gimple_build_label (c->label);
gimple_try_set_cleanup (tp, new_seq);
- return frob_into_branch_around (tp, try_region, out_label);
+ gimple_seq new_eh_seq = eh_seq;
+ eh_seq = old_eh_seq;
+ gimple_seq ret_seq = frob_into_branch_around (tp, try_region, out_label);
+ gimple_seq_add_seq (&eh_seq, new_eh_seq);
+ return ret_seq;
}
/* A subroutine of lower_eh_constructs_1. Lower a GIMPLE_TRY with a
region trees that record all the magic. */
static gimple_seq
-lower_eh_filter (struct leh_state *state, gimple tp)
+lower_eh_filter (struct leh_state *state, gtry *tp)
{
struct leh_state this_state = *state;
eh_region this_region = NULL;
this_state.cur_region = this_region;
}
- lower_eh_constructs_1 (&this_state, gimple_try_eval (tp));
+ lower_eh_constructs_1 (&this_state, gimple_try_eval_ptr (tp));
if (!eh_region_may_contain_throw (this_region))
return gimple_try_eval (tp);
x = gimple_build_label (this_region->u.allowed.label);
gimple_seq_add_stmt (&new_seq, x);
- lower_eh_constructs_1 (&this_state, gimple_eh_filter_failure (inner));
+ lower_eh_constructs_1 (&this_state, gimple_eh_filter_failure_ptr (inner));
gimple_seq_add_seq (&new_seq, gimple_eh_filter_failure (inner));
gimple_try_set_cleanup (tp, new_seq);
plus the exception region trees that record all the magic. */
static gimple_seq
-lower_eh_must_not_throw (struct leh_state *state, gimple tp)
+lower_eh_must_not_throw (struct leh_state *state, gtry *tp)
{
struct leh_state this_state = *state;
this_region = gen_eh_region_must_not_throw (state->cur_region);
this_region->u.must_not_throw.failure_decl
- = gimple_eh_must_not_throw_fndecl (inner);
- this_region->u.must_not_throw.failure_loc = gimple_location (tp);
+ = gimple_eh_must_not_throw_fndecl (
+ as_a <geh_mnt *> (inner));
+ this_region->u.must_not_throw.failure_loc
+ = LOCATION_LOCUS (gimple_location (tp));
/* In order to get mangling applied to this decl, we must mark it
used now. Otherwise, pass_ipa_free_lang_data won't think it
this_state.cur_region = this_region;
}
- lower_eh_constructs_1 (&this_state, gimple_try_eval (tp));
+ lower_eh_constructs_1 (&this_state, gimple_try_eval_ptr (tp));
return gimple_try_eval (tp);
}
except that we only execute the cleanup block for exception edges. */
static gimple_seq
-lower_cleanup (struct leh_state *state, gimple tp)
+lower_cleanup (struct leh_state *state, gtry *tp)
{
struct leh_state this_state = *state;
eh_region this_region = NULL;
this_state.cur_region = this_region;
}
- lower_eh_constructs_1 (&this_state, gimple_try_eval (tp));
+ lower_eh_constructs_1 (&this_state, gimple_try_eval_ptr (tp));
if (cleanup_dead || !eh_region_may_contain_throw (this_region))
return gimple_try_eval (tp);
{
/* In this case honor_protect_cleanup_actions had nothing to do,
and we should process this normally. */
- lower_eh_constructs_1 (state, gimple_try_cleanup (tp));
+ lower_eh_constructs_1 (state, gimple_try_cleanup_ptr (tp));
result = frob_into_branch_around (tp, this_region,
fake_tf.fallthru_label);
}
/* If the stmt can throw use a new temporary for the assignment
to a LHS. This makes sure the old value of the LHS is
available on the EH edge. Only do so for statements that
- potentially fall thru (no noreturn calls e.g.), otherwise
+ potentially fall through (no noreturn calls e.g.), otherwise
this new assignment might create fake fallthru regions. */
if (stmt_could_throw_p (stmt)
&& gimple_has_lhs (stmt)
&& is_gimple_reg_type (TREE_TYPE (gimple_get_lhs (stmt))))
{
tree lhs = gimple_get_lhs (stmt);
- tree tmp = create_tmp_var (TREE_TYPE (lhs), NULL);
+ tree tmp = create_tmp_var (TREE_TYPE (lhs));
gimple s = gimple_build_assign (lhs, tmp);
gimple_set_location (s, gimple_location (stmt));
gimple_set_block (s, gimple_block (stmt));
break;
case GIMPLE_SWITCH:
- verify_norecord_switch_expr (state, stmt);
+ verify_norecord_switch_expr (state, as_a <gswitch *> (stmt));
break;
case GIMPLE_TRY:
- if (gimple_try_kind (stmt) == GIMPLE_TRY_FINALLY)
- replace = lower_try_finally (state, stmt);
- else
- {
- x = gimple_seq_first_stmt (gimple_try_cleanup (stmt));
- if (!x)
- {
- replace = gimple_try_eval (stmt);
- lower_eh_constructs_1 (state, replace);
- }
- else
- switch (gimple_code (x))
+ {
+ gtry *try_stmt = as_a <gtry *> (stmt);
+ if (gimple_try_kind (try_stmt) == GIMPLE_TRY_FINALLY)
+ replace = lower_try_finally (state, try_stmt);
+ else
+ {
+ x = gimple_seq_first_stmt (gimple_try_cleanup (try_stmt));
+ if (!x)
{
+ replace = gimple_try_eval (try_stmt);
+ lower_eh_constructs_1 (state, &replace);
+ }
+ else
+ switch (gimple_code (x))
+ {
case GIMPLE_CATCH:
- replace = lower_catch (state, stmt);
- break;
+ replace = lower_catch (state, try_stmt);
+ break;
case GIMPLE_EH_FILTER:
- replace = lower_eh_filter (state, stmt);
- break;
+ replace = lower_eh_filter (state, try_stmt);
+ break;
case GIMPLE_EH_MUST_NOT_THROW:
- replace = lower_eh_must_not_throw (state, stmt);
- break;
+ replace = lower_eh_must_not_throw (state, try_stmt);
+ break;
case GIMPLE_EH_ELSE:
- /* This code is only valid with GIMPLE_TRY_FINALLY. */
- gcc_unreachable ();
+ /* This code is only valid with GIMPLE_TRY_FINALLY. */
+ gcc_unreachable ();
default:
- replace = lower_cleanup (state, stmt);
- break;
- }
- }
+ replace = lower_cleanup (state, try_stmt);
+ break;
+ }
+ }
+ }
/* Remove the old stmt and insert the transformed sequence
instead. */
/* A helper to unwrap a gimple_seq and feed stmts to lower_eh_constructs_2. */
static void
-lower_eh_constructs_1 (struct leh_state *state, gimple_seq seq)
+lower_eh_constructs_1 (struct leh_state *state, gimple_seq *pseq)
{
gimple_stmt_iterator gsi;
- for (gsi = gsi_start (seq); !gsi_end_p (gsi);)
+ for (gsi = gsi_start (*pseq); !gsi_end_p (gsi);)
lower_eh_constructs_2 (state, &gsi);
}
-static unsigned int
-lower_eh_constructs (void)
+namespace {
+
+const pass_data pass_data_lower_eh =
+{
+ GIMPLE_PASS, /* type */
+ "eh", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_TREE_EH, /* tv_id */
+ PROP_gimple_lcf, /* properties_required */
+ PROP_gimple_leh, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_lower_eh : public gimple_opt_pass
+{
+public:
+ pass_lower_eh (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_lower_eh, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual unsigned int execute (function *);
+
+}; // class pass_lower_eh
+
+unsigned int
+pass_lower_eh::execute (function *fun)
{
struct leh_state null_state;
gimple_seq bodyp;
if (bodyp == NULL)
return 0;
- finally_tree = htab_create (31, struct_ptr_hash, struct_ptr_eq, free);
+ finally_tree = new hash_table<finally_tree_hasher> (31);
eh_region_may_contain_throw_map = BITMAP_ALLOC (NULL);
memset (&null_state, 0, sizeof (null_state));
collect_finally_tree_1 (bodyp, NULL);
- lower_eh_constructs_1 (&null_state, bodyp);
+ lower_eh_constructs_1 (&null_state, &bodyp);
+ gimple_set_body (current_function_decl, bodyp);
/* We assume there's a return statement, or something, at the end of
the function, and thus ploping the EH sequence afterward won't
didn't change its value, and we don't have to re-set the function. */
gcc_assert (bodyp == gimple_body (current_function_decl));
- htab_delete (finally_tree);
+ delete finally_tree;
+ finally_tree = NULL;
BITMAP_FREE (eh_region_may_contain_throw_map);
eh_seq = NULL;
/* If this function needs a language specific EH personality routine
and the frontend didn't already set one do so now. */
- if (function_needs_eh_personality (cfun) == eh_personality_lang
+ if (function_needs_eh_personality (fun) == eh_personality_lang
&& !DECL_FUNCTION_PERSONALITY (current_function_decl))
DECL_FUNCTION_PERSONALITY (current_function_decl)
= lang_hooks.eh_personality ();
return 0;
}
-struct gimple_opt_pass pass_lower_eh =
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_lower_eh (gcc::context *ctxt)
{
- {
- GIMPLE_PASS,
- "eh", /* name */
- NULL, /* gate */
- lower_eh_constructs, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_TREE_EH, /* tv_id */
- PROP_gimple_lcf, /* properties_required */
- PROP_gimple_leh, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0 /* todo_flags_finish */
- }
-};
+ return new pass_lower_eh (ctxt);
+}
\f
/* Create the multiple edges from an EH_DISPATCH statement to all of
the possible handlers for its EH region. Return true if there's
no fallthru edge; false if there is. */
bool
-make_eh_dispatch_edges (gimple stmt)
+make_eh_dispatch_edges (geh_dispatch *stmt)
{
eh_region r;
eh_catch c;
The actual edge update will happen in the caller. */
void
-redirect_eh_dispatch_edge (gimple stmt, edge e, basic_block new_bb)
+redirect_eh_dispatch_edge (geh_dispatch *stmt, edge e, basic_block new_bb)
{
tree new_lab = gimple_block_label (new_bb);
bool any_changed = false;
case UNEQ_EXPR:
return honor_snans;
- case CONVERT_EXPR:
- case FIX_TRUNC_EXPR:
- /* Conversion of floating point might trap. */
- return honor_nans;
-
case NEGATE_EXPR:
case ABS_EXPR:
case CONJ_EXPR:
&handled);
}
+
+/* Returns true if it is possible to prove that the index of
+ an array access REF (an ARRAY_REF expression) falls into the
+ array bounds. */
+
+static bool
+in_array_bounds_p (tree ref)
+{
+ tree idx = TREE_OPERAND (ref, 1);
+ tree min, max;
+
+ if (TREE_CODE (idx) != INTEGER_CST)
+ return false;
+
+ min = array_ref_low_bound (ref);
+ max = array_ref_up_bound (ref);
+ if (!min
+ || !max
+ || TREE_CODE (min) != INTEGER_CST
+ || TREE_CODE (max) != INTEGER_CST)
+ return false;
+
+ if (tree_int_cst_lt (idx, min)
+ || tree_int_cst_lt (max, idx))
+ return false;
+
+ return true;
+}
+
+/* Returns true if it is possible to prove that the range of
+ an array access REF (an ARRAY_RANGE_REF expression) falls
+ into the array bounds. */
+
+static bool
+range_in_array_bounds_p (tree ref)
+{
+ tree domain_type = TYPE_DOMAIN (TREE_TYPE (ref));
+ tree range_min, range_max, min, max;
+
+ range_min = TYPE_MIN_VALUE (domain_type);
+ range_max = TYPE_MAX_VALUE (domain_type);
+ if (!range_min
+ || !range_max
+ || TREE_CODE (range_min) != INTEGER_CST
+ || TREE_CODE (range_max) != INTEGER_CST)
+ return false;
+
+ min = array_ref_low_bound (ref);
+ max = array_ref_up_bound (ref);
+ if (!min
+ || !max
+ || TREE_CODE (min) != INTEGER_CST
+ || TREE_CODE (max) != INTEGER_CST)
+ return false;
+
+ if (tree_int_cst_lt (range_min, min)
+ || tree_int_cst_lt (max, range_max))
+ return false;
+
+ return true;
+}
+
/* Return true if EXPR can trap, as in dereferencing an invalid pointer
location or floating point arithmetic. C.f. the rtl version, may_trap_p.
This routine expects only GIMPLE lhs or rhs input. */
restart:
switch (code)
{
- case TARGET_MEM_REF:
- if (TREE_CODE (TMR_BASE (expr)) == ADDR_EXPR
- && !TMR_INDEX (expr) && !TMR_INDEX2 (expr))
- return false;
- return !TREE_THIS_NOTRAP (expr);
-
case COMPONENT_REF:
case REALPART_EXPR:
case IMAGPART_EXPR:
return false;
return !in_array_bounds_p (expr);
+ case TARGET_MEM_REF:
case MEM_REF:
- if (TREE_CODE (TREE_OPERAND (expr, 0)) == ADDR_EXPR)
+ if (TREE_CODE (TREE_OPERAND (expr, 0)) == ADDR_EXPR
+ && tree_could_trap_p (TREE_OPERAND (TREE_OPERAND (expr, 0), 0)))
+ return true;
+ if (TREE_THIS_NOTRAP (expr))
return false;
- /* Fallthru. */
+ /* We cannot prove that the access is in-bounds when we have
+ variable-index TARGET_MEM_REFs. */
+ if (code == TARGET_MEM_REF
+ && (TMR_INDEX (expr) || TMR_INDEX2 (expr)))
+ return true;
+ if (TREE_CODE (TREE_OPERAND (expr, 0)) == ADDR_EXPR)
+ {
+ tree base = TREE_OPERAND (TREE_OPERAND (expr, 0), 0);
+ offset_int off = mem_ref_offset (expr);
+ if (wi::neg_p (off, SIGNED))
+ return true;
+ if (TREE_CODE (base) == STRING_CST)
+ return wi::leu_p (TREE_STRING_LENGTH (base), off);
+ else if (DECL_SIZE_UNIT (base) == NULL_TREE
+ || TREE_CODE (DECL_SIZE_UNIT (base)) != INTEGER_CST
+ || wi::leu_p (wi::to_offset (DECL_SIZE_UNIT (base)), off))
+ return true;
+ /* Now we are sure the first byte of the access is inside
+ the object. */
+ return false;
+ }
+ return true;
+
case INDIRECT_REF:
return !TREE_THIS_NOTRAP (expr);
/* Assume that accesses to weak functions may trap, unless we know
they are certainly defined in current TU or in some other
LTO partition. */
- if (DECL_WEAK (expr))
+ if (DECL_WEAK (expr) && !DECL_COMDAT (expr) && DECL_EXTERNAL (expr))
{
- struct cgraph_node *node;
- if (!DECL_EXTERNAL (expr))
- return false;
- node = cgraph_function_node (cgraph_get_node (expr), NULL);
- if (node && node->symbol.in_other_partition)
- return false;
- return true;
+ cgraph_node *node = cgraph_node::get (expr);
+ if (node)
+ node = node->function_symbol ();
+ return !(node && node->in_other_partition);
}
return false;
/* Assume that accesses to weak vars may trap, unless we know
they are certainly defined in current TU or in some other
LTO partition. */
- if (DECL_WEAK (expr))
+ if (DECL_WEAK (expr) && !DECL_COMDAT (expr) && DECL_EXTERNAL (expr))
{
- struct varpool_node *node;
- if (!DECL_EXTERNAL (expr))
- return false;
- node = varpool_variable_node (varpool_get_node (expr), NULL);
- if (node && node->symbol.in_other_partition)
- return false;
- return true;
+ varpool_node *node = varpool_node::get (expr);
+ if (node)
+ node = node->ultimate_alias_target ();
+ return !(node && node->in_other_partition);
}
return false;
return true;
case GIMPLE_CALL:
- return !gimple_call_nothrow_p (stmt);
+ return !gimple_call_nothrow_p (as_a <gcall *> (stmt));
case GIMPLE_ASSIGN:
case GIMPLE_COND:
case GIMPLE_ASM:
if (!cfun->can_throw_non_call_exceptions)
return false;
- return gimple_asm_volatile_p (stmt);
+ return gimple_asm_volatile_p (as_a <gasm *> (stmt));
default:
return false;
return false;
}
-/* Given a statement OLD_STMT in OLD_FUN and a duplicate statment NEW_STMT
+/* Given a statement OLD_STMT in OLD_FUN and a duplicate statement NEW_STMT
in NEW_FUN, copy the EH table data from OLD_STMT to NEW_STMT. The MAP
operand is the return value of duplicate_eh_regions. */
bool
maybe_duplicate_eh_stmt_fn (struct function *new_fun, gimple new_stmt,
struct function *old_fun, gimple old_stmt,
- struct pointer_map_t *map, int default_lp_nr)
+ hash_map<void *, void *> *map,
+ int default_lp_nr)
{
int old_lp_nr, new_lp_nr;
- void **slot;
if (!stmt_could_throw_p (new_stmt))
return false;
{
eh_landing_pad old_lp, new_lp;
- old_lp = VEC_index (eh_landing_pad, old_fun->eh->lp_array, old_lp_nr);
- slot = pointer_map_contains (map, old_lp);
- new_lp = (eh_landing_pad) *slot;
+ old_lp = (*old_fun->eh->lp_array)[old_lp_nr];
+ new_lp = static_cast<eh_landing_pad> (*map->get (old_lp));
new_lp_nr = new_lp->index;
}
else
{
eh_region old_r, new_r;
- old_r = VEC_index (eh_region, old_fun->eh->region_array, -old_lp_nr);
- slot = pointer_map_contains (map, old_r);
- new_r = (eh_region) *slot;
+ old_r = (*old_fun->eh->region_array)[-old_lp_nr];
+ new_r = static_cast<eh_region> (*map->get (old_r));
new_lp_nr = -new_r->index;
}
temporary used in the initializer for A. */
static void
-optimize_double_finally (gimple one, gimple two)
+optimize_double_finally (gtry *one, gtry *two)
{
gimple oneh;
gimple_stmt_iterator gsi;
+ gimple_seq cleanup;
- gsi = gsi_start (gimple_try_cleanup (one));
+ cleanup = gimple_try_cleanup (one);
+ gsi = gsi_start (cleanup);
if (!gsi_one_before_end_p (gsi))
return;
two = NULL;
else
two = gsi_stmt (gsi);
- if (one
- && two
- && gimple_code (one) == GIMPLE_TRY
- && gimple_code (two) == GIMPLE_TRY
- && gimple_try_kind (one) == GIMPLE_TRY_FINALLY
- && gimple_try_kind (two) == GIMPLE_TRY_FINALLY)
- optimize_double_finally (one, two);
+ if (one && two)
+ if (gtry *try_one = dyn_cast <gtry *> (one))
+ if (gtry *try_two = dyn_cast <gtry *> (two))
+ if (gimple_try_kind (try_one) == GIMPLE_TRY_FINALLY
+ && gimple_try_kind (try_two) == GIMPLE_TRY_FINALLY)
+ optimize_double_finally (try_one, try_two);
if (one)
switch (gimple_code (one))
{
refactor_eh_r (gimple_try_cleanup (one));
break;
case GIMPLE_CATCH:
- refactor_eh_r (gimple_catch_handler (one));
+ refactor_eh_r (gimple_catch_handler (as_a <gcatch *> (one)));
break;
case GIMPLE_EH_FILTER:
refactor_eh_r (gimple_eh_filter_failure (one));
break;
case GIMPLE_EH_ELSE:
- refactor_eh_r (gimple_eh_else_n_body (one));
- refactor_eh_r (gimple_eh_else_e_body (one));
+ {
+ geh_else *eh_else_stmt = as_a <geh_else *> (one);
+ refactor_eh_r (gimple_eh_else_n_body (eh_else_stmt));
+ refactor_eh_r (gimple_eh_else_e_body (eh_else_stmt));
+ }
break;
default:
break;
}
}
-static unsigned
-refactor_eh (void)
+namespace {
+
+const pass_data pass_data_refactor_eh =
{
- refactor_eh_r (gimple_body (current_function_decl));
- return 0;
-}
+ GIMPLE_PASS, /* type */
+ "ehopt", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_TREE_EH, /* tv_id */
+ PROP_gimple_lcf, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
-static bool
-gate_refactor_eh (void)
+class pass_refactor_eh : public gimple_opt_pass
{
- return flag_exceptions != 0;
-}
+public:
+ pass_refactor_eh (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_refactor_eh, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual bool gate (function *) { return flag_exceptions != 0; }
+ virtual unsigned int execute (function *)
+ {
+ refactor_eh_r (gimple_body (current_function_decl));
+ return 0;
+ }
+
+}; // class pass_refactor_eh
-struct gimple_opt_pass pass_refactor_eh =
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_refactor_eh (gcc::context *ctxt)
{
- {
- GIMPLE_PASS,
- "ehopt", /* name */
- gate_refactor_eh, /* gate */
- refactor_eh, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_TREE_EH, /* tv_id */
- PROP_gimple_lcf, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0 /* todo_flags_finish */
- }
-};
+ return new pass_refactor_eh (ctxt);
+}
\f
/* At the end of gimple optimization, we can lower RESX. */
static bool
-lower_resx (basic_block bb, gimple stmt, struct pointer_map_t *mnt_map)
+lower_resx (basic_block bb, gresx *stmt,
+ hash_map<eh_region, tree> *mnt_map)
{
int lp_nr;
eh_region src_r, dst_r;
if (lp_nr < 0)
{
basic_block new_bb;
- void **slot;
tree lab;
/* We are resuming into a MUST_NOT_CALL region. Expand a call to
the failure decl into a new block, if needed. */
gcc_assert (dst_r->type == ERT_MUST_NOT_THROW);
- slot = pointer_map_contains (mnt_map, dst_r);
+ tree *slot = mnt_map->get (dst_r);
if (slot == NULL)
{
gimple_stmt_iterator gsi2;
new_bb = create_empty_bb (bb);
- if (current_loops)
- add_bb_to_loop (new_bb, bb->loop_father);
+ add_bb_to_loop (new_bb, bb->loop_father);
lab = gimple_block_label (new_bb);
gsi2 = gsi_start_bb (new_bb);
gimple_set_location (x, dst_r->u.must_not_throw.failure_loc);
gsi_insert_after (&gsi2, x, GSI_CONTINUE_LINKING);
- slot = pointer_map_insert (mnt_map, dst_r);
- *slot = lab;
+ mnt_map->put (dst_r, lab);
}
else
{
- lab = (tree) *slot;
+ lab = *slot;
new_bb = label_to_block (lab);
}
fn = builtin_decl_implicit (BUILT_IN_EH_POINTER);
src_nr = build_int_cst (integer_type_node, src_r->index);
x = gimple_build_call (fn, 1, src_nr);
- var = create_tmp_var (ptr_type_node, NULL);
+ var = create_tmp_var (ptr_type_node);
var = make_ssa_name (var, x);
gimple_call_set_lhs (x, var);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
return ret;
}
-static unsigned
-execute_lower_resx (void)
+namespace {
+
+const pass_data pass_data_lower_resx =
+{
+ GIMPLE_PASS, /* type */
+ "resx", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_TREE_EH, /* tv_id */
+ PROP_gimple_lcf, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_lower_resx : public gimple_opt_pass
+{
+public:
+ pass_lower_resx (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_lower_resx, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual bool gate (function *) { return flag_exceptions != 0; }
+ virtual unsigned int execute (function *);
+
+}; // class pass_lower_resx
+
+unsigned
+pass_lower_resx::execute (function *fun)
{
basic_block bb;
- struct pointer_map_t *mnt_map;
bool dominance_invalidated = false;
bool any_rewritten = false;
- mnt_map = pointer_map_create ();
+ hash_map<eh_region, tree> mnt_map;
- FOR_EACH_BB (bb)
+ FOR_EACH_BB_FN (bb, fun)
{
gimple last = last_stmt (bb);
if (last && is_gimple_resx (last))
{
- dominance_invalidated |= lower_resx (bb, last, mnt_map);
+ dominance_invalidated |=
+ lower_resx (bb, as_a <gresx *> (last), &mnt_map);
any_rewritten = true;
}
}
- pointer_map_destroy (mnt_map);
-
if (dominance_invalidated)
{
free_dominance_info (CDI_DOMINATORS);
return any_rewritten ? TODO_update_ssa_only_virtuals : 0;
}
-static bool
-gate_lower_resx (void)
-{
- return flag_exceptions != 0;
-}
+} // anon namespace
-struct gimple_opt_pass pass_lower_resx =
+gimple_opt_pass *
+make_pass_lower_resx (gcc::context *ctxt)
{
- {
- GIMPLE_PASS,
- "resx", /* name */
- gate_lower_resx, /* gate */
- execute_lower_resx, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_TREE_EH, /* tv_id */
- PROP_gimple_lcf, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- TODO_verify_flow /* todo_flags_finish */
- }
-};
+ return new pass_lower_resx (ctxt);
+}
/* Try to optimize var = {v} {CLOBBER} stmts followed just by
external throw. */
optimize_clobbers (basic_block bb)
{
gimple_stmt_iterator gsi = gsi_last_bb (bb);
+ bool any_clobbers = false;
+ bool seen_stack_restore = false;
+ edge_iterator ei;
+ edge e;
+
+ /* Only optimize anything if the bb contains at least one clobber,
+ ends with resx (checked by caller), optionally contains some
+ debug stmts or labels, or at most one __builtin_stack_restore
+ call, and has an incoming EH edge. */
for (gsi_prev (&gsi); !gsi_end_p (gsi); gsi_prev (&gsi))
{
gimple stmt = gsi_stmt (gsi);
if (is_gimple_debug (stmt))
continue;
- if (!gimple_clobber_p (stmt)
- || TREE_CODE (gimple_assign_lhs (stmt)) == SSA_NAME)
- return;
+ if (gimple_clobber_p (stmt))
+ {
+ any_clobbers = true;
+ continue;
+ }
+ if (!seen_stack_restore
+ && gimple_call_builtin_p (stmt, BUILT_IN_STACK_RESTORE))
+ {
+ seen_stack_restore = true;
+ continue;
+ }
+ if (gimple_code (stmt) == GIMPLE_LABEL)
+ break;
+ return;
+ }
+ if (!any_clobbers)
+ return;
+ FOR_EACH_EDGE (e, ei, bb->preds)
+ if (e->flags & EDGE_EH)
+ break;
+ if (e == NULL)
+ return;
+ gsi = gsi_last_bb (bb);
+ for (gsi_prev (&gsi); !gsi_end_p (gsi); gsi_prev (&gsi))
+ {
+ gimple stmt = gsi_stmt (gsi);
+ if (!gimple_clobber_p (stmt))
+ continue;
unlink_stmt_vdef (stmt);
gsi_remove (&gsi, true);
release_defs (stmt);
gimple_stmt_iterator gsi, dgsi;
basic_block succbb;
bool any_clobbers = false;
+ unsigned todo = 0;
/* Only optimize if BB has a single EH successor and
all predecessor edges are EH too. */
continue;
if (gimple_code (stmt) == GIMPLE_LABEL)
break;
- if (!gimple_clobber_p (stmt)
- || TREE_CODE (gimple_assign_lhs (stmt)) == SSA_NAME)
+ if (!gimple_clobber_p (stmt))
return 0;
any_clobbers = true;
}
if (!any_clobbers)
return 0;
- succbb = single_succ (bb);
+ edge succe = single_succ_edge (bb);
+ succbb = succe->dest;
+
+ /* See if there is a virtual PHI node to take an updated virtual
+ operand from. */
+ gphi *vphi = NULL;
+ tree vuse = NULL_TREE;
+ for (gphi_iterator gpi = gsi_start_phis (succbb);
+ !gsi_end_p (gpi); gsi_next (&gpi))
+ {
+ tree res = gimple_phi_result (gpi.phi ());
+ if (virtual_operand_p (res))
+ {
+ vphi = gpi.phi ();
+ vuse = res;
+ break;
+ }
+ }
+
dgsi = gsi_after_labels (succbb);
gsi = gsi_last_bb (bb);
for (gsi_prev (&gsi); !gsi_end_p (gsi); gsi_prev (&gsi))
{
gimple stmt = gsi_stmt (gsi);
- tree vdef;
+ tree lhs;
if (is_gimple_debug (stmt))
continue;
if (gimple_code (stmt) == GIMPLE_LABEL)
break;
- unlink_stmt_vdef (stmt);
+ lhs = gimple_assign_lhs (stmt);
+ /* Unfortunately we don't have dominance info updated at this
+ point, so checking if
+ dominated_by_p (CDI_DOMINATORS, succbb,
+ gimple_bb (SSA_NAME_DEF_STMT (TREE_OPERAND (lhs, 0)))
+ would be too costly. Thus, avoid sinking any clobbers that
+ refer to non-(D) SSA_NAMEs. */
+ if (TREE_CODE (lhs) == MEM_REF
+ && TREE_CODE (TREE_OPERAND (lhs, 0)) == SSA_NAME
+ && !SSA_NAME_IS_DEFAULT_DEF (TREE_OPERAND (lhs, 0)))
+ {
+ unlink_stmt_vdef (stmt);
+ gsi_remove (&gsi, true);
+ release_defs (stmt);
+ continue;
+ }
+
+ /* As we do not change stmt order when sinking across a
+ forwarder edge we can keep virtual operands in place. */
gsi_remove (&gsi, false);
- vdef = gimple_vdef (stmt);
- if (vdef && TREE_CODE (vdef) == SSA_NAME)
+ gsi_insert_before (&dgsi, stmt, GSI_NEW_STMT);
+
+ /* But adjust virtual operands if we sunk across a PHI node. */
+ if (vuse)
{
- release_ssa_name (vdef);
- vdef = SSA_NAME_VAR (vdef);
- mark_sym_for_renaming (vdef);
- gimple_set_vdef (stmt, vdef);
- gimple_set_vuse (stmt, vdef);
+ gimple use_stmt;
+ imm_use_iterator iter;
+ use_operand_p use_p;
+ FOR_EACH_IMM_USE_STMT (use_stmt, iter, vuse)
+ FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
+ SET_USE (use_p, gimple_vdef (stmt));
+ if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (vuse))
+ {
+ SSA_NAME_OCCURS_IN_ABNORMAL_PHI (gimple_vdef (stmt)) = 1;
+ SSA_NAME_OCCURS_IN_ABNORMAL_PHI (vuse) = 0;
+ }
+ /* Adjust the incoming virtual operand. */
+ SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (vphi, succe), gimple_vuse (stmt));
+ SET_USE (gimple_vuse_op (stmt), vuse);
+ }
+ /* If there isn't a single predecessor but no virtual PHI node
+ arrange for virtual operands to be renamed. */
+ else if (gimple_vuse_op (stmt) != NULL_USE_OPERAND_P
+ && !single_pred_p (succbb))
+ {
+ /* In this case there will be no use of the VDEF of this stmt.
+ ??? Unless this is a secondary opportunity and we have not
+ removed unreachable blocks yet, so we cannot assert this.
+ Which also means we will end up renaming too many times. */
+ SET_USE (gimple_vuse_op (stmt), gimple_vop (cfun));
+ mark_virtual_operands_for_renaming (cfun);
+ todo |= TODO_update_ssa_only_virtuals;
}
- gsi_insert_before (&dgsi, stmt, GSI_SAME_STMT);
}
- return TODO_update_ssa_only_virtuals;
+ return todo;
}
/* At the end of inlining, we can lower EH_DISPATCH. Return true when
we have found some duplicate labels and removed some edges. */
static bool
-lower_eh_dispatch (basic_block src, gimple stmt)
+lower_eh_dispatch (basic_block src, geh_dispatch *stmt)
{
gimple_stmt_iterator gsi;
int region_nr;
{
case ERT_TRY:
{
- VEC (tree, heap) *labels = NULL;
+ auto_vec<tree> labels;
tree default_label = NULL;
eh_catch c;
edge_iterator ei;
edge e;
- struct pointer_set_t *seen_values = pointer_set_create ();
+ hash_set<tree> seen_values;
/* Collect the labels for a switch. Zero the post_landing_pad
field becase we'll no longer have anything keeping these labels
- in existance and the optimizer will be free to merge these
+ in existence and the optimizer will be free to merge these
blocks at will. */
for (c = r->u.eh_try.first_catch; c ; c = c->next_catch)
{
attached to the handler anymore, we remove
the corresponding edge and then we delete unreachable
blocks at the end of this pass. */
- if (! pointer_set_contains (seen_values, TREE_VALUE (flt_node)))
+ if (! seen_values.contains (TREE_VALUE (flt_node)))
{
tree t = build_case_label (TREE_VALUE (flt_node),
NULL, lab);
- VEC_safe_push (tree, heap, labels, t);
- pointer_set_insert (seen_values, TREE_VALUE (flt_node));
+ labels.safe_push (t);
+ seen_values.add (TREE_VALUE (flt_node));
have_label = true;
}
/* Don't generate a switch if there's only a default case.
This is common in the form of try { A; } catch (...) { B; }. */
- if (labels == NULL)
+ if (!labels.exists ())
{
e = single_succ_edge (src);
e->flags |= EDGE_FALLTHRU;
fn = builtin_decl_implicit (BUILT_IN_EH_FILTER);
x = gimple_build_call (fn, 1, build_int_cst (integer_type_node,
region_nr));
- filter = create_tmp_var (TREE_TYPE (TREE_TYPE (fn)), NULL);
+ filter = create_tmp_var (TREE_TYPE (TREE_TYPE (fn)));
filter = make_ssa_name (filter, x);
gimple_call_set_lhs (x, filter);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
default_label = build_case_label (NULL, NULL, default_label);
sort_case_labels (labels);
- x = gimple_build_switch_vec (filter, default_label, labels);
+ x = gimple_build_switch (filter, default_label, labels);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
-
- VEC_free (tree, heap, labels);
}
- pointer_set_destroy (seen_values);
}
break;
fn = builtin_decl_implicit (BUILT_IN_EH_FILTER);
x = gimple_build_call (fn, 1, build_int_cst (integer_type_node,
region_nr));
- filter = create_tmp_var (TREE_TYPE (TREE_TYPE (fn)), NULL);
+ filter = create_tmp_var (TREE_TYPE (TREE_TYPE (fn)));
filter = make_ssa_name (filter, x);
gimple_call_set_lhs (x, filter);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
return redirected;
}
-static unsigned
-execute_lower_eh_dispatch (void)
+namespace {
+
+const pass_data pass_data_lower_eh_dispatch =
+{
+ GIMPLE_PASS, /* type */
+ "ehdisp", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_TREE_EH, /* tv_id */
+ PROP_gimple_lcf, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_lower_eh_dispatch : public gimple_opt_pass
+{
+public:
+ pass_lower_eh_dispatch (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_lower_eh_dispatch, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ virtual bool gate (function *fun) { return fun->eh->region_tree != NULL; }
+ virtual unsigned int execute (function *);
+
+}; // class pass_lower_eh_dispatch
+
+unsigned
+pass_lower_eh_dispatch::execute (function *fun)
{
basic_block bb;
int flags = 0;
assign_filter_values ();
- FOR_EACH_BB (bb)
+ FOR_EACH_BB_FN (bb, fun)
{
gimple last = last_stmt (bb);
if (last == NULL)
continue;
if (gimple_code (last) == GIMPLE_EH_DISPATCH)
{
- redirected |= lower_eh_dispatch (bb, last);
+ redirected |= lower_eh_dispatch (bb,
+ as_a <geh_dispatch *> (last));
flags |= TODO_update_ssa_only_virtuals;
}
else if (gimple_code (last) == GIMPLE_RESX)
return flags;
}
-static bool
-gate_lower_eh_dispatch (void)
-{
- return cfun->eh->region_tree != NULL;
-}
+} // anon namespace
-struct gimple_opt_pass pass_lower_eh_dispatch =
+gimple_opt_pass *
+make_pass_lower_eh_dispatch (gcc::context *ctxt)
{
- {
- GIMPLE_PASS,
- "ehdisp", /* name */
- gate_lower_eh_dispatch, /* gate */
- execute_lower_eh_dispatch, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_TREE_EH, /* tv_id */
- PROP_gimple_lcf, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- TODO_verify_flow /* todo_flags_finish */
- }
-};
+ return new pass_lower_eh_dispatch (ctxt);
+}
\f
-/* Walk statements, see what regions are really referenced and remove
- those that are unused. */
+/* Walk statements, see what regions and, optionally, landing pads
+ are really referenced.
+
+ Returns in R_REACHABLEP an sbitmap with bits set for reachable regions,
+ and in LP_REACHABLE an sbitmap with bits set for reachable landing pads.
+
+ Passing NULL for LP_REACHABLE is valid, in this case only reachable
+ regions are marked.
+
+ The caller is responsible for freeing the returned sbitmaps. */
static void
-remove_unreachable_handlers (void)
+mark_reachable_handlers (sbitmap *r_reachablep, sbitmap *lp_reachablep)
{
sbitmap r_reachable, lp_reachable;
- eh_region region;
- eh_landing_pad lp;
basic_block bb;
- int lp_nr, r_nr;
+ bool mark_landing_pads = (lp_reachablep != NULL);
+ gcc_checking_assert (r_reachablep != NULL);
+
+ r_reachable = sbitmap_alloc (cfun->eh->region_array->length ());
+ bitmap_clear (r_reachable);
+ *r_reachablep = r_reachable;
- r_reachable = sbitmap_alloc (VEC_length (eh_region, cfun->eh->region_array));
- lp_reachable
- = sbitmap_alloc (VEC_length (eh_landing_pad, cfun->eh->lp_array));
- sbitmap_zero (r_reachable);
- sbitmap_zero (lp_reachable);
+ if (mark_landing_pads)
+ {
+ lp_reachable = sbitmap_alloc (cfun->eh->lp_array->length ());
+ bitmap_clear (lp_reachable);
+ *lp_reachablep = lp_reachable;
+ }
+ else
+ lp_reachable = NULL;
- FOR_EACH_BB (bb)
+ FOR_EACH_BB_FN (bb, cfun)
{
gimple_stmt_iterator gsi;
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
gimple stmt = gsi_stmt (gsi);
- lp_nr = lookup_stmt_eh_lp (stmt);
-
- /* Negative LP numbers are MUST_NOT_THROW regions which
- are not considered BB enders. */
- if (lp_nr < 0)
- SET_BIT (r_reachable, -lp_nr);
- /* Positive LP numbers are real landing pads, are are BB enders. */
- else if (lp_nr > 0)
+ if (mark_landing_pads)
{
- gcc_assert (gsi_one_before_end_p (gsi));
- region = get_eh_region_from_lp_number (lp_nr);
- SET_BIT (r_reachable, region->index);
- SET_BIT (lp_reachable, lp_nr);
+ int lp_nr = lookup_stmt_eh_lp (stmt);
+
+ /* Negative LP numbers are MUST_NOT_THROW regions which
+ are not considered BB enders. */
+ if (lp_nr < 0)
+ bitmap_set_bit (r_reachable, -lp_nr);
+
+ /* Positive LP numbers are real landing pads, and BB enders. */
+ else if (lp_nr > 0)
+ {
+ gcc_assert (gsi_one_before_end_p (gsi));
+ eh_region region = get_eh_region_from_lp_number (lp_nr);
+ bitmap_set_bit (r_reachable, region->index);
+ bitmap_set_bit (lp_reachable, lp_nr);
+ }
}
/* Avoid removing regions referenced from RESX/EH_DISPATCH. */
switch (gimple_code (stmt))
{
case GIMPLE_RESX:
- SET_BIT (r_reachable, gimple_resx_region (stmt));
+ bitmap_set_bit (r_reachable,
+ gimple_resx_region (as_a <gresx *> (stmt)));
break;
case GIMPLE_EH_DISPATCH:
- SET_BIT (r_reachable, gimple_eh_dispatch_region (stmt));
+ bitmap_set_bit (r_reachable,
+ gimple_eh_dispatch_region (
+ as_a <geh_dispatch *> (stmt)));
+ break;
+ case GIMPLE_CALL:
+ if (gimple_call_builtin_p (stmt, BUILT_IN_EH_COPY_VALUES))
+ for (int i = 0; i < 2; ++i)
+ {
+ tree rt = gimple_call_arg (stmt, i);
+ HOST_WIDE_INT ri = tree_to_shwi (rt);
+
+ gcc_assert (ri = (int)ri);
+ bitmap_set_bit (r_reachable, ri);
+ }
break;
default:
break;
}
}
}
+}
+
+/* Remove unreachable handlers and unreachable landing pads. */
+
+static void
+remove_unreachable_handlers (void)
+{
+ sbitmap r_reachable, lp_reachable;
+ eh_region region;
+ eh_landing_pad lp;
+ unsigned i;
+
+ mark_reachable_handlers (&r_reachable, &lp_reachable);
if (dump_file)
{
fprintf (dump_file, "Before removal of unreachable regions:\n");
dump_eh_tree (dump_file, cfun);
fprintf (dump_file, "Reachable regions: ");
- dump_sbitmap_file (dump_file, r_reachable);
+ dump_bitmap_file (dump_file, r_reachable);
fprintf (dump_file, "Reachable landing pads: ");
- dump_sbitmap_file (dump_file, lp_reachable);
+ dump_bitmap_file (dump_file, lp_reachable);
}
- for (r_nr = 1;
- VEC_iterate (eh_region, cfun->eh->region_array, r_nr, region); ++r_nr)
- if (region && !TEST_BIT (r_reachable, r_nr))
- {
- if (dump_file)
- fprintf (dump_file, "Removing unreachable region %d\n", r_nr);
- remove_eh_handler (region);
- }
+ if (dump_file)
+ {
+ FOR_EACH_VEC_SAFE_ELT (cfun->eh->region_array, i, region)
+ if (region && !bitmap_bit_p (r_reachable, region->index))
+ fprintf (dump_file,
+ "Removing unreachable region %d\n",
+ region->index);
+ }
+
+ remove_unreachable_eh_regions (r_reachable);
- for (lp_nr = 1;
- VEC_iterate (eh_landing_pad, cfun->eh->lp_array, lp_nr, lp); ++lp_nr)
- if (lp && !TEST_BIT (lp_reachable, lp_nr))
+ FOR_EACH_VEC_SAFE_ELT (cfun->eh->lp_array, i, lp)
+ if (lp && !bitmap_bit_p (lp_reachable, lp->index))
{
if (dump_file)
- fprintf (dump_file, "Removing unreachable landing pad %d\n", lp_nr);
+ fprintf (dump_file,
+ "Removing unreachable landing pad %d\n",
+ lp->index);
remove_eh_landing_pad (lp);
}
maybe_remove_unreachable_handlers (void)
{
eh_landing_pad lp;
- int i;
+ unsigned i;
if (cfun->eh == NULL)
return;
-
- for (i = 1; VEC_iterate (eh_landing_pad, cfun->eh->lp_array, i, lp); ++i)
+
+ FOR_EACH_VEC_SAFE_ELT (cfun->eh->lp_array, i, lp)
if (lp && lp->post_landing_pad)
{
if (label_to_block (lp->post_landing_pad) == NULL)
/* Remove regions that do not have landing pads. This assumes
that remove_unreachable_handlers has already been run, and
- that we've just manipulated the landing pads since then. */
+ that we've just manipulated the landing pads since then.
+
+ Preserve regions with landing pads and regions that prevent
+ exceptions from propagating further, even if these regions
+ are not reachable. */
static void
remove_unreachable_handlers_no_lp (void)
{
- eh_region r;
- int i;
+ eh_region region;
sbitmap r_reachable;
- basic_block bb;
+ unsigned i;
- r_reachable = sbitmap_alloc (VEC_length (eh_region, cfun->eh->region_array));
- sbitmap_zero (r_reachable);
+ mark_reachable_handlers (&r_reachable, /*lp_reachablep=*/NULL);
- FOR_EACH_BB (bb)
+ FOR_EACH_VEC_SAFE_ELT (cfun->eh->region_array, i, region)
{
- gimple stmt = last_stmt (bb);
- if (stmt)
- /* Avoid removing regions referenced from RESX/EH_DISPATCH. */
- switch (gimple_code (stmt))
- {
- case GIMPLE_RESX:
- SET_BIT (r_reachable, gimple_resx_region (stmt));
- break;
- case GIMPLE_EH_DISPATCH:
- SET_BIT (r_reachable, gimple_eh_dispatch_region (stmt));
- break;
- default:
- break;
- }
+ if (! region)
+ continue;
+
+ if (region->landing_pads != NULL
+ || region->type == ERT_MUST_NOT_THROW)
+ bitmap_set_bit (r_reachable, region->index);
+
+ if (dump_file
+ && !bitmap_bit_p (r_reachable, region->index))
+ fprintf (dump_file,
+ "Removing unreachable region %d\n",
+ region->index);
}
- for (i = 1; VEC_iterate (eh_region, cfun->eh->region_array, i, r); ++i)
- if (r && r->landing_pads == NULL && r->type != ERT_MUST_NOT_THROW
- && !TEST_BIT (r_reachable, i))
- {
- if (dump_file)
- fprintf (dump_file, "Removing unreachable region %d\n", i);
- remove_eh_handler (r);
- }
+ remove_unreachable_eh_regions (r_reachable);
sbitmap_free (r_reachable);
}
edge e_in, e_out;
/* Quickly check the edge counts on BB for singularity. */
- if (EDGE_COUNT (bb->preds) != 1 || EDGE_COUNT (bb->succs) != 1)
+ if (!single_pred_p (bb) || !single_succ_p (bb))
return false;
- e_in = EDGE_PRED (bb, 0);
- e_out = EDGE_SUCC (bb, 0);
+ e_in = single_pred_edge (bb);
+ e_out = single_succ_edge (bb);
/* Input edge must be EH and output edge must be normal. */
if ((e_in->flags & EDGE_EH) == 0 || (e_out->flags & EDGE_EH) != 0)
for a different region. */
for (gsi = gsi_start_bb (e_out->dest); !gsi_end_p (gsi); gsi_next (&gsi))
{
- gimple stmt = gsi_stmt (gsi);
+ glabel *label_stmt = dyn_cast <glabel *> (gsi_stmt (gsi));
tree lab;
int lp_nr;
- if (gimple_code (stmt) != GIMPLE_LABEL)
+ if (!label_stmt)
break;
- lab = gimple_label_label (stmt);
+ lab = gimple_label_label (label_stmt);
lp_nr = EH_LANDING_PAD_NR (lab);
if (lp_nr && get_eh_region_from_lp_number (lp_nr) != lp->region)
return false;
that doesn't appear to handle virtuals. Propagate by hand. */
if (!gimple_seq_empty_p (phi_nodes (bb)))
{
- for (gsi = gsi_start_phis (bb); !gsi_end_p (gsi); )
+ for (gphi_iterator gpi = gsi_start_phis (bb); !gsi_end_p (gpi); )
{
- gimple use_stmt, phi = gsi_stmt (gsi);
+ gimple use_stmt;
+ gphi *phi = gpi.phi ();
tree lhs = gimple_phi_result (phi);
tree rhs = gimple_phi_arg_def (phi, 0);
use_operand_p use_p;
if (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (lhs))
SSA_NAME_OCCURS_IN_ABNORMAL_PHI (rhs) = 1;
- remove_phi_node (&gsi, true);
+ remove_phi_node (&gpi, true);
}
}
eh_landing_pad lp;
int i;
- for (i = 1; VEC_iterate (eh_landing_pad, cfun->eh->lp_array, i, lp); ++i)
+ for (i = 1; vec_safe_iterate (cfun->eh->lp_array, i, &lp); ++i)
if (lp)
changed |= unsplit_eh (lp);
cleanup_empty_eh_merge_phis (basic_block new_bb, basic_block old_bb,
edge old_bb_out, bool change_region)
{
- gimple_stmt_iterator ngsi, ogsi;
+ gphi_iterator ngsi, ogsi;
edge_iterator ei;
edge e;
- bitmap rename_virts;
bitmap ophi_handled;
/* The destination block must not be a regular successor for any
redirect_edge_var_map_clear (e);
ophi_handled = BITMAP_ALLOC (NULL);
- rename_virts = BITMAP_ALLOC (NULL);
/* First, iterate through the PHIs on NEW_BB and set up the edge_var_map
for the edges we're going to move. */
for (ngsi = gsi_start_phis (new_bb); !gsi_end_p (ngsi); gsi_next (&ngsi))
{
- gimple ophi, nphi = gsi_stmt (ngsi);
+ gphi *ophi, *nphi = ngsi.phi ();
tree nresult, nop;
nresult = gimple_phi_result (nphi);
ophi = NULL;
for (ogsi = gsi_start_phis (old_bb); !gsi_end_p (ogsi); gsi_next (&ogsi))
{
- ophi = gsi_stmt (ogsi);
+ ophi = ogsi.phi ();
if (gimple_phi_result (ophi) == nop)
break;
ophi = NULL;
redirect_edge_var_map_add (e, nresult, oop, oloc);
}
}
- /* If we didn't find the PHI, but it's a VOP, remember to rename
- it later, assuming all other tests succeed. */
- else if (!is_gimple_reg (nresult))
- bitmap_set_bit (rename_virts, SSA_NAME_VERSION (nresult));
- /* If we didn't find the PHI, and it's a real variable, we know
+ /* If we didn't find the PHI, if it's a real variable or a VOP, we know
from the fact that OLD_BB is tree_empty_eh_handler_p that the
variable is unchanged from input to the block and we can simply
re-use the input to NEW_BB from the OLD_BB_OUT edge. */
we don't know what values from the other edges into NEW_BB to use. */
for (ogsi = gsi_start_phis (old_bb); !gsi_end_p (ogsi); gsi_next (&ogsi))
{
- gimple ophi = gsi_stmt (ogsi);
+ gphi *ophi = ogsi.phi ();
tree oresult = gimple_phi_result (ophi);
if (!bitmap_bit_p (ophi_handled, SSA_NAME_VERSION (oresult)))
goto fail;
}
- /* At this point we know that the merge will succeed. Remove the PHI
- nodes for the virtuals that we want to rename. */
- if (!bitmap_empty_p (rename_virts))
- {
- for (ngsi = gsi_start_phis (new_bb); !gsi_end_p (ngsi); )
- {
- gimple nphi = gsi_stmt (ngsi);
- tree nresult = gimple_phi_result (nphi);
- if (bitmap_bit_p (rename_virts, SSA_NAME_VERSION (nresult)))
- {
- mark_virtual_phi_result_for_renaming (nphi);
- remove_phi_node (&ngsi, true);
- }
- else
- gsi_next (&ngsi);
- }
- }
-
/* Finally, move the edges and update the PHIs. */
for (ei = ei_start (old_bb->preds); (e = ei_safe_edge (ei)); )
if (e->flags & EDGE_EH)
we may have created a loop with multiple latches.
All of this isn't easily fixed thus cancel the affected loop
and mark the other loop as possibly having multiple latches. */
- if (current_loops
- && e->dest == e->dest->loop_father->header)
+ if (e->dest == e->dest->loop_father->header)
{
- e->dest->loop_father->header = NULL;
- e->dest->loop_father->latch = NULL;
+ mark_loop_for_removal (e->dest->loop_father);
new_bb->loop_father->latch = NULL;
- loops_state_set (LOOPS_NEED_FIXUP|LOOPS_MAY_HAVE_MULTIPLE_LATCHES);
+ loops_state_set (LOOPS_MAY_HAVE_MULTIPLE_LATCHES);
}
redirect_eh_edge_1 (e, new_bb, change_region);
redirect_edge_succ (e, new_bb);
ei_next (&ei);
BITMAP_FREE (ophi_handled);
- BITMAP_FREE (rename_virts);
return true;
fail:
FOR_EACH_EDGE (e, ei, old_bb->preds)
redirect_edge_var_map_clear (e);
BITMAP_FREE (ophi_handled);
- BITMAP_FREE (rename_virts);
return false;
}
lab = NULL;
for (gsi = gsi_start_bb (e_out->dest); !gsi_end_p (gsi); gsi_next (&gsi))
{
- gimple stmt = gsi_stmt (gsi);
+ glabel *stmt = dyn_cast <glabel *> (gsi_stmt (gsi));
int lp_nr;
- if (gimple_code (stmt) != GIMPLE_LABEL)
+ if (!stmt)
break;
lab = gimple_label_label (stmt);
lp_nr = EH_LANDING_PAD_NR (lab);
e_out = NULL;
break;
case 1:
- e_out = EDGE_SUCC (bb, 0);
+ e_out = single_succ_edge (bb);
break;
default:
return false;
/* If the block is totally empty, look for more unsplitting cases. */
if (gsi_end_p (gsi))
{
- /* For the degenerate case of an infinite loop bail out. */
- if (infinite_empty_loop_p (e_out))
+ /* For the degenerate case of an infinite loop bail out.
+ If bb has no successors and is totally empty, which can happen e.g.
+ because of incorrect noreturn attribute, bail out too. */
+ if (e_out == NULL
+ || infinite_empty_loop_p (e_out))
return ret;
return ret | cleanup_empty_eh_unsplit (bb, e_out, lp);
eh_landing_pad lp;
int i;
- for (i = 1; VEC_iterate (eh_landing_pad, cfun->eh->lp_array, i, lp); ++i)
+ for (i = 1; vec_safe_iterate (cfun->eh->lp_array, i, &lp); ++i)
if (lp)
changed |= cleanup_empty_eh (lp);
2) MUST_NOT_THROW regions that became dead because of 1) are optimized out
3) Info about regions that are containing instructions, and regions
reachable via local EH edges is collected
- 4) Eh tree is pruned for regions no longer neccesary.
+ 4) Eh tree is pruned for regions no longer necessary.
TODO: Push MUST_NOT_THROW regions to the root of the EH tree.
Unify those that have the same failure decl and locus.
remove_unreachable_handlers ();
/* Watch out for the region tree vanishing due to all unreachable. */
- if (cfun->eh->region_tree && optimize)
+ if (cfun->eh->region_tree)
{
bool changed = false;
- changed |= unsplit_all_eh ();
+ if (optimize)
+ changed |= unsplit_all_eh ();
changed |= cleanup_all_empty_eh ();
if (changed)
return 0;
}
-static unsigned int
-execute_cleanup_eh (void)
+namespace {
+
+const pass_data pass_data_cleanup_eh =
+{
+ GIMPLE_PASS, /* type */
+ "ehcleanup", /* name */
+ OPTGROUP_NONE, /* optinfo_flags */
+ TV_TREE_EH, /* tv_id */
+ PROP_gimple_lcf, /* properties_required */
+ 0, /* properties_provided */
+ 0, /* properties_destroyed */
+ 0, /* todo_flags_start */
+ 0, /* todo_flags_finish */
+};
+
+class pass_cleanup_eh : public gimple_opt_pass
+{
+public:
+ pass_cleanup_eh (gcc::context *ctxt)
+ : gimple_opt_pass (pass_data_cleanup_eh, ctxt)
+ {}
+
+ /* opt_pass methods: */
+ opt_pass * clone () { return new pass_cleanup_eh (m_ctxt); }
+ virtual bool gate (function *fun)
+ {
+ return fun->eh != NULL && fun->eh->region_tree != NULL;
+ }
+
+ virtual unsigned int execute (function *);
+
+}; // class pass_cleanup_eh
+
+unsigned int
+pass_cleanup_eh::execute (function *fun)
{
int ret = execute_cleanup_eh_1 ();
clear it. This exposes cross-language inlining opportunities
and avoids references to a never defined personality routine. */
if (DECL_FUNCTION_PERSONALITY (current_function_decl)
- && function_needs_eh_personality (cfun) != eh_personality_lang)
+ && function_needs_eh_personality (fun) != eh_personality_lang)
DECL_FUNCTION_PERSONALITY (current_function_decl) = NULL_TREE;
return ret;
}
-static bool
-gate_cleanup_eh (void)
+} // anon namespace
+
+gimple_opt_pass *
+make_pass_cleanup_eh (gcc::context *ctxt)
{
- return cfun->eh != NULL && cfun->eh->region_tree != NULL;
+ return new pass_cleanup_eh (ctxt);
}
-
-struct gimple_opt_pass pass_cleanup_eh = {
- {
- GIMPLE_PASS,
- "ehcleanup", /* name */
- gate_cleanup_eh, /* gate */
- execute_cleanup_eh, /* execute */
- NULL, /* sub */
- NULL, /* next */
- 0, /* static_pass_number */
- TV_TREE_EH, /* tv_id */
- PROP_gimple_lcf, /* properties_required */
- 0, /* properties_provided */
- 0, /* properties_destroyed */
- 0, /* todo_flags_start */
- 0 /* todo_flags_finish */
- }
-};
\f
/* Verify that BB containing STMT as the last statement, has precisely the
edge that make_eh_edges would create. */
/* Similarly, but handle GIMPLE_EH_DISPATCH specifically. */
DEBUG_FUNCTION bool
-verify_eh_dispatch_edge (gimple stmt)
+verify_eh_dispatch_edge (geh_dispatch *stmt)
{
eh_region r;
eh_catch c;