#define verify_norecord_switch_expr(state, switch_expr)
#endif
-/* Redirect a RETURN_EXPR pointed to by STMT_P to FINLAB. Place in CONT_P
- whatever is needed to finish the return. If MOD is non-null, insert it
- before the new branch. RETURN_VALUE_P is a cache containing a temporary
- variable to be used in manipulating the value returned from the function. */
+/* Redirect a RETURN_EXPR pointed to by Q to FINLAB. If MOD is
+ non-null, insert it before the new branch. */
static void
-do_return_redirection (struct goto_queue_node *q, tree finlab, gimple_seq mod,
- tree *return_value_p)
+do_return_redirection (struct goto_queue_node *q, tree finlab, gimple_seq mod)
{
- tree ret_expr;
gimple x;
- /* In the case of a return, the queue node must be a gimple statement. */
+ /* In the case of a return, the queue node must be a gimple statement. */
gcc_assert (!q->is_label);
- ret_expr = gimple_return_retval (q->stmt.g);
+ /* Note that the return value may have already been computed, e.g.,
- if (ret_expr)
- {
- if (!*return_value_p)
- *return_value_p = ret_expr;
- else
- gcc_assert (*return_value_p == ret_expr);
- q->cont_stmt = q->stmt.g;
- /* The nasty part about redirecting the return value is that the
- return value itself is to be computed before the FINALLY block
- is executed. e.g.
-
- int x;
- int foo (void)
- {
- x = 0;
- try {
- return x;
- } finally {
- x++;
- }
- }
-
- should return 0, not 1. Arrange for this to happen by copying
- computed the return value into a local temporary. This also
- allows us to redirect multiple return statements through the
- same destination block; whether this is a net win or not really
- depends, I guess, but it does make generation of the switch in
- lower_try_finally_switch easier. */
-
- if (TREE_CODE (ret_expr) == RESULT_DECL)
+ int x;
+ int foo (void)
{
- if (!*return_value_p)
- *return_value_p = ret_expr;
- else
- gcc_assert (*return_value_p == ret_expr);
- q->cont_stmt = q->stmt.g;
+ x = 0;
+ try {
+ return x;
+ } finally {
+ x++;
+ }
}
- else
- gcc_unreachable ();
- }
- else
- /* If we don't return a value, all return statements are the same. */
- q->cont_stmt = q->stmt.g;
+
+ should return 0, not 1. We don't have to do anything to make
+ this happens because the return value has been placed in the
+ RESULT_DECL already. */
+
+ q->cont_stmt = q->stmt.g;
if (!q->repl_stmt)
q->repl_stmt = gimple_seq_alloc ();
{
while (bitmap_set_bit (eh_region_may_contain_throw_map, region->index))
{
+ if (region->type == ERT_MUST_NOT_THROW)
+ break;
region = region->outer;
if (region == NULL)
break;
lower_try_finally_nofallthru (struct leh_state *state,
struct leh_tf_state *tf)
{
- tree lab, return_val;
+ tree lab;
gimple x;
gimple_seq finally;
struct goto_queue_node *q, *qe;
x = gimple_build_label (lab);
gimple_seq_add_stmt (&tf->top_p_seq, x);
- return_val = NULL;
q = tf->goto_queue;
qe = q + tf->goto_queue_active;
for (; q < qe; ++q)
if (q->index < 0)
- do_return_redirection (q, lab, NULL, &return_val);
+ do_return_redirection (q, lab, NULL);
else
do_goto_redirection (q, lab, NULL, tf);
if (tf->may_return)
{
/* Reachable by return expressions only. Redirect them. */
- tree return_val = NULL;
for (; q < qe; ++q)
- do_return_redirection (q, finally_label, NULL, &return_val);
+ do_return_redirection (q, finally_label, NULL);
replace_goto_queue (tf);
}
else
if (tf->goto_queue)
{
struct goto_queue_node *q, *qe;
- tree return_val = NULL;
int return_index, index;
struct labels_s
{
= create_artificial_label (tf_loc);
if (index == return_index)
- do_return_redirection (q, lab, NULL, &return_val);
+ do_return_redirection (q, lab, NULL);
else
do_goto_redirection (q, lab, NULL, tf);
lab = labels[index].label;
if (index == return_index)
- do_return_redirection (q, lab, NULL, &return_val);
+ do_return_redirection (q, lab, NULL);
else
do_goto_redirection (q, lab, NULL, tf);
}
lower_try_finally_switch (struct leh_state *state, struct leh_tf_state *tf)
{
struct goto_queue_node *q, *qe;
- tree return_val = NULL;
tree finally_tmp, finally_label;
int return_index, eh_index, fallthru_index;
int nlabels, ndests, j, last_case_index;
if (tf->may_fallthru)
{
x = gimple_build_assign (finally_tmp,
- build_int_cst (NULL, fallthru_index));
+ build_int_cst (integer_type_node,
+ fallthru_index));
gimple_seq_add_stmt (&tf->top_p_seq, x);
- last_case = build3 (CASE_LABEL_EXPR, void_type_node,
- build_int_cst (NULL, fallthru_index),
- NULL, create_artificial_label (tf_loc));
+ 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);
last_case_index++;
emit_post_landing_pad (&eh_seq, tf->region);
x = gimple_build_assign (finally_tmp,
- build_int_cst (NULL, eh_index));
+ build_int_cst (integer_type_node, eh_index));
gimple_seq_add_stmt (&eh_seq, x);
x = gimple_build_goto (finally_label);
gimple_seq_add_stmt (&eh_seq, x);
- last_case = build3 (CASE_LABEL_EXPR, void_type_node,
- build_int_cst (NULL, eh_index),
- NULL, create_artificial_label (tf_loc));
+ 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);
last_case_index++;
if (q->index < 0)
{
x = gimple_build_assign (finally_tmp,
- build_int_cst (NULL, return_index));
+ build_int_cst (integer_type_node,
+ return_index));
gimple_seq_add_stmt (&mod, x);
- do_return_redirection (q, finally_label, mod, &return_val);
+ do_return_redirection (q, finally_label, mod);
switch_id = return_index;
}
else
{
x = gimple_build_assign (finally_tmp,
- build_int_cst (NULL, q->index));
+ build_int_cst (integer_type_node, q->index));
gimple_seq_add_stmt (&mod, x);
do_goto_redirection (q, finally_label, mod, tf);
switch_id = q->index;
{
tree case_lab;
void **slot;
- case_lab = build3 (CASE_LABEL_EXPR, void_type_node,
- build_int_cst (NULL, switch_id),
- NULL, NULL);
+ 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. We don't create the new label while
- walking the goto_queue because pointers don't offer a stable
- order. */
+ it in the loop below. */
if (!cont_map)
cont_map = pointer_map_create ();
slot = pointer_map_insert (cont_map, case_lab);
}
for (j = last_case_index; j < last_case_index + nlabels; j++)
{
- tree label;
gimple cont_stmt;
void **slot;
gcc_assert (cont_map);
slot = pointer_map_contains (cont_map, last_case);
- /* As the comment above suggests, CASE_LABEL (last_case) was just a
- placeholder, it does not store an actual label, yet. */
gcc_assert (slot);
cont_stmt = *(gimple *) slot;
- label = create_artificial_label (tf_loc);
- CASE_LABEL (last_case) = label;
-
- x = gimple_build_label (label);
+ x = gimple_build_label (CASE_LABEL (last_case));
gimple_seq_add_stmt (&switch_body, x);
gimple_seq_add_stmt (&switch_body, cont_stmt);
maybe_record_in_goto_queue (state, cont_stmt);
}
VEC_free (tree, heap, this_tf.dest_array);
- if (this_tf.goto_queue)
- free (this_tf.goto_queue);
+ free (this_tf.goto_queue);
if (this_tf.goto_queue_map)
pointer_map_destroy (this_tf.goto_queue_map);
this zero argument with the current catch region number. */
if (state->ehp_region)
{
- tree nr = build_int_cst (NULL, state->ehp_region->index);
+ tree nr = build_int_cst (integer_type_node,
+ state->ehp_region->index);
gimple_call_set_arg (stmt, 0, nr);
}
else
PROP_gimple_leh, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func /* todo_flags_finish */
+ 0 /* todo_flags_finish */
}
};
\f
case CALL_EXPR:
t = get_callee_fndecl (expr);
/* Assume that calls to weak functions may trap. */
- if (!t || !DECL_P (t) || DECL_WEAK (t))
+ if (!t || !DECL_P (t))
return true;
+ if (DECL_WEAK (t))
+ return tree_could_trap_p (t);
+ return false;
+
+ case FUNCTION_DECL:
+ /* 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))
+ {
+ struct cgraph_node *node;
+ if (!DECL_EXTERNAL (expr))
+ return false;
+ node = cgraph_function_node (cgraph_get_node (expr), NULL);
+ if (node && node->in_other_partition)
+ return false;
+ return true;
+ }
+ return false;
+
+ case VAR_DECL:
+ /* 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))
+ {
+ struct varpool_node *node;
+ if (!DECL_EXTERNAL (expr))
+ return false;
+ node = varpool_variable_node (varpool_get_node (expr), NULL);
+ if (node && node->in_other_partition)
+ return false;
+ return true;
+ }
return false;
default:
|| TREE_CODE_CLASS (code) == tcc_unary
|| TREE_CODE_CLASS (code) == tcc_binary)
{
- t = gimple_expr_type (stmt);
+ if (is_gimple_assign (stmt)
+ && TREE_CODE_CLASS (code) == tcc_comparison)
+ t = TREE_TYPE (gimple_assign_rhs1 (stmt));
+ else if (gimple_code (stmt) == GIMPLE_COND)
+ t = TREE_TYPE (gimple_cond_lhs (stmt));
+ else
+ t = gimple_expr_type (stmt);
fp_operation = FLOAT_TYPE_P (t);
if (fp_operation)
{
|| gimple_call_lhs (twos)
|| gimple_call_chain (ones)
|| gimple_call_chain (twos)
- || !operand_equal_p (gimple_call_fn (ones), gimple_call_fn (twos), 0)
+ || !gimple_call_same_target_p (ones, twos)
|| gimple_call_num_args (ones) != gimple_call_num_args (twos))
return false;
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func /* todo_flags_finish */
+ 0 /* todo_flags_finish */
}
};
\f
Resolve this by expanding the resx node to an abort. */
- fn = implicit_built_in_decls[BUILT_IN_TRAP];
+ fn = builtin_decl_implicit (BUILT_IN_TRAP);
x = gimple_build_call (fn, 0);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
else
{
edge_iterator ei;
- tree dst_nr = build_int_cst (NULL, dst_r->index);
+ tree dst_nr = build_int_cst (integer_type_node, dst_r->index);
- fn = implicit_built_in_decls[BUILT_IN_EH_COPY_VALUES];
- src_nr = build_int_cst (NULL, src_r->index);
+ fn = builtin_decl_implicit (BUILT_IN_EH_COPY_VALUES);
+ src_nr = build_int_cst (integer_type_node, src_r->index);
x = gimple_build_call (fn, 2, dst_nr, src_nr);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
with no arguments for C++ and Java. Check for that. */
if (src_r->use_cxa_end_cleanup)
{
- fn = implicit_built_in_decls[BUILT_IN_CXA_END_CLEANUP];
+ fn = builtin_decl_implicit (BUILT_IN_CXA_END_CLEANUP);
x = gimple_build_call (fn, 0);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
}
else
{
- fn = implicit_built_in_decls[BUILT_IN_EH_POINTER];
- src_nr = build_int_cst (NULL, src_r->index);
+ 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 = make_ssa_name (var, x);
gimple_call_set_lhs (x, var);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
- fn = implicit_built_in_decls[BUILT_IN_UNWIND_RESUME];
+ fn = builtin_decl_implicit (BUILT_IN_UNWIND_RESUME);
x = gimple_build_call (fn, 1, var);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
}
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func | TODO_verify_flow /* todo_flags_finish */
+ TODO_verify_flow /* todo_flags_finish */
}
};
blocks at the end of this pass. */
if (! pointer_set_contains (seen_values, TREE_VALUE (flt_node)))
{
- tree t = build3 (CASE_LABEL_EXPR, void_type_node,
- TREE_VALUE (flt_node), NULL, lab);
+ 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));
have_label = true;
}
else
{
- fn = implicit_built_in_decls[BUILT_IN_EH_FILTER];
- x = gimple_build_call (fn, 1, build_int_cst (NULL, region_nr));
+ 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 = make_ssa_name (filter, x);
gimple_call_set_lhs (x, filter);
gsi_insert_before (&gsi, x, GSI_SAME_STMT);
/* Turn the default label into a default case. */
- default_label = build3 (CASE_LABEL_EXPR, void_type_node,
- NULL, NULL, default_label);
+ default_label = build_case_label (NULL, NULL, default_label);
sort_case_labels (labels);
x = gimple_build_switch_vec (filter, default_label, labels);
edge b_e = BRANCH_EDGE (src);
edge f_e = FALLTHRU_EDGE (src);
- fn = implicit_built_in_decls[BUILT_IN_EH_FILTER];
- x = gimple_build_call (fn, 1, build_int_cst (NULL, region_nr));
+ 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 = make_ssa_name (filter, x);
gimple_call_set_lhs (x, filter);
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func | TODO_verify_flow /* todo_flags_finish */
+ TODO_verify_flow /* todo_flags_finish */
}
};
\f
FOR_EACH_BB (bb)
{
- gimple_stmt_iterator gsi = gsi_start_bb (bb);
+ gimple_stmt_iterator gsi;
for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
{
SET_BIT (r_reachable, region->index);
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));
+ break;
+ case GIMPLE_EH_DISPATCH:
+ SET_BIT (r_reachable, gimple_eh_dispatch_region (stmt));
+ break;
+ default:
+ break;
+ }
}
}
/* If we did find the corresponding PHI, copy those inputs. */
if (ophi)
{
+ /* If NOP is used somewhere else beyond phis in new_bb, give up. */
+ if (!has_single_use (nop))
+ {
+ imm_use_iterator imm_iter;
+ use_operand_p use_p;
+
+ FOR_EACH_IMM_USE_FAST (use_p, imm_iter, nop)
+ {
+ if (!gimple_debug_bind_p (USE_STMT (use_p))
+ && (gimple_code (USE_STMT (use_p)) != GIMPLE_PHI
+ || gimple_bb (USE_STMT (use_p)) != new_bb))
+ goto fail;
+ }
+ }
bitmap_set_bit (ophi_handled, SSA_NAME_VERSION (nop));
FOR_EACH_EDGE (e, ei, old_bb->preds)
{
return cleanup_empty_eh_unsplit (bb, e_out, lp);
}
- /* The block should consist only of a single RESX statement. */
+ /* The block should consist only of a single RESX statement, modulo a
+ preceding call to __builtin_stack_restore if there is no outgoing
+ edge, since the call can be eliminated in this case. */
resx = gsi_stmt (gsi);
+ if (!e_out && gimple_call_builtin_p (resx, BUILT_IN_STACK_RESTORE))
+ {
+ gsi_next (&gsi);
+ resx = gsi_stmt (gsi);
+ }
if (!is_gimple_resx (resx))
return false;
gcc_assert (gsi_one_before_end_p (gsi));
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
- TODO_dump_func /* todo_flags_finish */
+ 0 /* todo_flags_finish */
}
};
\f
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