tree
force_rvalue (tree expr)
{
if (MAYBE_CLASS_TYPE_P (TREE_TYPE (expr)) && TREE_CODE (expr) != TARGET_EXPR)
expr = ocp_convert (TREE_TYPE (expr), expr,
CONV_IMPLICIT|CONV_FORCE_TEMP, LOOKUP_NORMAL);
else
expr = decay_conversion (expr);
return expr;
}
tree
build_throw (tree exp)
{
if (exp == error_mark_node)
return exp;
if (processing_template_decl)
{
if (cfun)
current_function_returns_abnormally = 1;
exp = build_min (THROW_EXPR, void_type_node, exp);
SET_EXPR_LOCATION (exp, input_location);
return exp;
}
if (exp && null_node_p (exp))
warning (0, "throwing NULL, which has integral, not pointer type");
if (exp != NULL_TREE)
{
if (!is_admissible_throw_operand_or_catch_parameter (exp, true))
return error_mark_node;
}
if (! doing_eh ())
return error_mark_node;
if (exp)
{
tree throw_type;
tree temp_type;
tree cleanup;
tree object, ptr;
tree tmp;
tree allocate_expr;
/* The CLEANUP_TYPE is the internal type of a destructor. */
if (!cleanup_type)
{
tmp = build_function_type_list (void_type_node,
ptr_type_node, NULL_TREE);
cleanup_type = build_pointer_type (tmp);
}
if (!throw_fn)
{
tree name = get_identifier ("__cxa_throw");
throw_fn = get_global_binding (name);
if (!throw_fn)
{
/* Declare void __cxa_throw (void*, void*, void (*)(void*)). */
/* ??? Second argument is supposed to be "std::type_info*". */
tmp = build_function_type_list (void_type_node,
ptr_type_node, ptr_type_node,
cleanup_type, NULL_TREE);
throw_fn = push_throw_library_fn (name, tmp);
if (flag_tm)
{
tree itm_name = get_identifier ("_ITM_cxa_throw");
tree itm_fn = get_global_binding (itm_name);
if (!itm_fn)
itm_fn = push_throw_library_fn (itm_name, tmp);
apply_tm_attr (itm_fn, get_identifier ("transaction_pure"));
record_tm_replacement (throw_fn, itm_fn);
}
}
}
/* [except.throw]
A throw-expression initializes a temporary object, the type
of which is determined by removing any top-level
cv-qualifiers from the static type of the operand of throw
and adjusting the type from "array of T" or "function return
T" to "pointer to T" or "pointer to function returning T"
respectively. */
temp_type = is_bitfield_expr_with_lowered_type (exp);
if (!temp_type)
temp_type = cv_unqualified (type_decays_to (TREE_TYPE (exp)));
/* OK, this is kind of wacky. The standard says that we call
terminate when the exception handling mechanism, after
completing evaluation of the expression to be thrown but
before the exception is caught (_except.throw_), calls a
user function that exits via an uncaught exception.
So we have to protect the actual initialization of the
exception object with terminate(), but evaluate the
expression first. Since there could be temps in the
expression, we need to handle that, too. We also expand
the call to __cxa_allocate_exception first (which doesn't
matter, since it can't throw). */
/* Allocate the space for the exception. */
allocate_expr = do_allocate_exception (temp_type);
allocate_expr = get_target_expr (allocate_expr);
ptr = TARGET_EXPR_SLOT (allocate_expr);
TARGET_EXPR_CLEANUP (allocate_expr) = do_free_exception (ptr);
CLEANUP_EH_ONLY (allocate_expr) = 1;
object = build_nop (build_pointer_type (temp_type), ptr);
object = cp_build_fold_indirect_ref (object);
/* And initialize the exception object. */
if (CLASS_TYPE_P (temp_type))
{
int flags = LOOKUP_NORMAL | LOOKUP_ONLYCONVERTING;
vec<tree, va_gc> *exp_vec;
bool converted = false;
/* Under C++0x [12.8/16 class.copy], a thrown lvalue is sometimes
treated as an rvalue for the purposes of overload resolution
to favor move constructors over copy constructors. */
if (/* Must be a local, automatic variable. */
VAR_P (exp)
&& DECL_CONTEXT (exp) == current_function_decl
&& ! TREE_STATIC (exp)
/* The variable must not have the `volatile' qualifier. */
&& !(cp_type_quals (TREE_TYPE (exp)) & TYPE_QUAL_VOLATILE))
{
tree moved = move (exp);
exp_vec = make_tree_vector_single (moved);
moved = (build_special_member_call
(object, complete_ctor_identifier, &exp_vec,
TREE_TYPE (object), flags|LOOKUP_PREFER_RVALUE,
tf_none));
release_tree_vector (exp_vec);
if (moved != error_mark_node)
{
exp = moved;
converted = true;
}
}
/* Call the copy constructor. */
if (!converted)
{
exp_vec = make_tree_vector_single (exp);
exp = (build_special_member_call
(object, complete_ctor_identifier, &exp_vec,
TREE_TYPE (object), flags, tf_warning_or_error));
release_tree_vector (exp_vec);
}
if (exp == error_mark_node)
{
error (" in thrown expression");
return error_mark_node;
}
}
else
{
tmp = decay_conversion (exp, tf_warning_or_error);
if (tmp == error_mark_node)
return error_mark_node;
exp = build2 (INIT_EXPR, temp_type, object, tmp);
}
/* Mark any cleanups from the initialization as MUST_NOT_THROW, since
they are run after the exception object is initialized. */
cp_walk_tree_without_duplicates (&exp, wrap_cleanups_r, 0);
/* Prepend the allocation. */
exp = build2 (COMPOUND_EXPR, TREE_TYPE (exp), allocate_expr, exp);
/* Force all the cleanups to be evaluated here so that we don't have
to do them during unwinding. */
exp = build1 (CLEANUP_POINT_EXPR, void_type_node, exp);
throw_type = build_eh_type_type (prepare_eh_type (TREE_TYPE (object)));
cleanup = NULL_TREE;
if (type_build_dtor_call (TREE_TYPE (object)))
{
tree dtor_fn = lookup_fnfields (TYPE_BINFO (TREE_TYPE (object)),
complete_dtor_identifier, 0);
dtor_fn = BASELINK_FUNCTIONS (dtor_fn);
mark_used (dtor_fn);
if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (object)))
{
cxx_mark_addressable (dtor_fn);
/* Pretend it's a normal function. */
cleanup = build1 (ADDR_EXPR, cleanup_type, dtor_fn);
}
}
if (cleanup == NULL_TREE)
cleanup = build_int_cst (cleanup_type, 0);
/* ??? Indicate that this function call throws throw_type. */
tmp = cp_build_function_call_nary (throw_fn, tf_warning_or_error,
ptr, throw_type, cleanup, NULL_TREE);
/* Tack on the initialization stuff. */
exp = build2 (COMPOUND_EXPR, TREE_TYPE (tmp), exp, tmp);
}
else
{
/* Rethrow current exception. */
if (!rethrow_fn)
{
tree name = get_identifier ("__cxa_rethrow");
rethrow_fn = get_global_binding (name);
if (!rethrow_fn)
/* Declare void __cxa_rethrow (void). */
rethrow_fn = push_throw_library_fn
(name, build_function_type_list (void_type_node, NULL_TREE));
if (flag_tm)
apply_tm_attr (rethrow_fn, get_identifier ("transaction_pure"));
}
/* ??? Indicate that this function call allows exceptions of the type
of the enclosing catch block (if known). */
exp = cp_build_function_call_vec (rethrow_fn, NULL, tf_warning_or_error);
}
exp = build1 (THROW_EXPR, void_type_node, exp);
SET_EXPR_LOCATION (exp, input_location);
return exp;
}
void
maybe_add_lambda_conv_op (tree type)
{
bool nested = (cfun != NULL);
bool nested_def = decl_function_context (TYPE_MAIN_DECL (type));
tree callop = lambda_function (type);
if (LAMBDA_EXPR_CAPTURE_LIST (CLASSTYPE_LAMBDA_EXPR (type)) != NULL_TREE)
return;
if (processing_template_decl)
return;
bool const generic_lambda_p
= (DECL_TEMPLATE_INFO (callop)
&& DECL_TEMPLATE_RESULT (DECL_TI_TEMPLATE (callop)) == callop);
if (!generic_lambda_p && DECL_INITIAL (callop) == NULL_TREE)
{
/* If the op() wasn't instantiated due to errors, give up. */
gcc_assert (errorcount || sorrycount);
return;
}
/* Non-template conversion operators are defined directly with build_call_a
and using DIRECT_ARGVEC for arguments (including 'this'). Templates are
deferred and the CALL is built in-place. In the case of a deduced return
call op, the decltype expression, DECLTYPE_CALL, used as a substitute for
the return type is also built in-place. The arguments of DECLTYPE_CALL in
the return expression may differ in flags from those in the body CALL. In
particular, parameter pack expansions are marked PACK_EXPANSION_LOCAL_P in
the body CALL, but not in DECLTYPE_CALL. */
vec<tree, va_gc> *direct_argvec = 0;
tree decltype_call = 0, call = 0;
tree fn_result = TREE_TYPE (TREE_TYPE (callop));
if (generic_lambda_p)
{
/* Prepare the dependent member call for the static member function
'_FUN' and, potentially, prepare another call to be used in a decltype
return expression for a deduced return call op to allow for simple
implementation of the conversion operator. */
tree instance = build_nop (type, null_pointer_node);
tree objfn = build_min (COMPONENT_REF, NULL_TREE,
instance, DECL_NAME (callop), NULL_TREE);
int nargs = list_length (DECL_ARGUMENTS (callop)) - 1;
call = prepare_op_call (objfn, nargs);
if (type_uses_auto (fn_result))
decltype_call = prepare_op_call (objfn, nargs);
}
else
{
direct_argvec = make_tree_vector ();
direct_argvec->quick_push (build1 (NOP_EXPR,
TREE_TYPE (DECL_ARGUMENTS (callop)),
null_pointer_node));
}
/* Copy CALLOP's argument list (as per 'copy_list') as FN_ARGS in order to
declare the static member function "_FUN" below. For each arg append to
DIRECT_ARGVEC (for the non-template case) or populate the pre-allocated
call args (for the template case). If a parameter pack is found, expand
it, flagging it as PACK_EXPANSION_LOCAL_P for the body call. */
tree fn_args = NULL_TREE;
{
int ix = 0;
tree src = DECL_CHAIN (DECL_ARGUMENTS (callop));
tree tgt;
while (src)
{
tree new_node = copy_node (src);
if (!fn_args)
fn_args = tgt = new_node;
else
{
TREE_CHAIN (tgt) = new_node;
tgt = new_node;
}
mark_exp_read (tgt);
if (generic_lambda_p)
{
if (DECL_PACK_P (tgt))
{
tree a = make_pack_expansion (tgt);
if (decltype_call)
CALL_EXPR_ARG (decltype_call, ix) = copy_node (a);
PACK_EXPANSION_LOCAL_P (a) = true;
CALL_EXPR_ARG (call, ix) = a;
}
else
{
tree a = convert_from_reference (tgt);
CALL_EXPR_ARG (call, ix) = a;
if (decltype_call)
CALL_EXPR_ARG (decltype_call, ix) = copy_node (a);
}
++ix;
}
else
vec_safe_push (direct_argvec, tgt);
src = TREE_CHAIN (src);
}
}
if (generic_lambda_p)
{
if (decltype_call)
{
++processing_template_decl;
fn_result = finish_decltype_type
(decltype_call, /*id_expression_or_member_access_p=*/false,
tf_warning_or_error);
--processing_template_decl;
}
}
else
call = build_call_a (callop,
direct_argvec->length (),
direct_argvec->address ());
CALL_FROM_THUNK_P (call) = 1;
tree stattype = build_function_type (fn_result, FUNCTION_ARG_CHAIN (callop));
/* First build up the conversion op. */
tree rettype = build_pointer_type (stattype);
tree name = mangle_conv_op_name_for_type (rettype);
tree thistype = cp_build_qualified_type (type, TYPE_QUAL_CONST);
tree fntype = build_method_type_directly (thistype, rettype, void_list_node);
tree convfn = build_lang_decl (FUNCTION_DECL, name, fntype);
tree fn = convfn;
DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop);
if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
&& DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
SET_OVERLOADED_OPERATOR_CODE (fn, TYPE_EXPR);
grokclassfn (type, fn, NO_SPECIAL);
set_linkage_according_to_type (type, fn);
rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof);
DECL_IN_AGGR_P (fn) = 1;
DECL_ARTIFICIAL (fn) = 1;
DECL_NOT_REALLY_EXTERN (fn) = 1;
DECL_DECLARED_INLINE_P (fn) = 1;
DECL_ARGUMENTS (fn) = build_this_parm (fntype, TYPE_QUAL_CONST);
if (nested_def)
DECL_INTERFACE_KNOWN (fn) = 1;
if (generic_lambda_p)
fn = add_inherited_template_parms (fn, DECL_TI_TEMPLATE (callop));
add_method (type, fn, NULL_TREE);
/* Generic thunk code fails for varargs; we'll complain in mark_used if
the conversion op is used. */
if (varargs_function_p (callop))
{
DECL_DELETED_FN (fn) = 1;
return;
}
/* Now build up the thunk to be returned. */
name = get_identifier ("_FUN");
tree statfn = build_lang_decl (FUNCTION_DECL, name, stattype);
fn = statfn;
DECL_SOURCE_LOCATION (fn) = DECL_SOURCE_LOCATION (callop);
if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
&& DECL_ALIGN (fn) < 2 * BITS_PER_UNIT)
DECL_ALIGN (fn) = 2 * BITS_PER_UNIT;
grokclassfn (type, fn, NO_SPECIAL);
set_linkage_according_to_type (type, fn);
rest_of_decl_compilation (fn, toplevel_bindings_p (), at_eof);
DECL_IN_AGGR_P (fn) = 1;
DECL_ARTIFICIAL (fn) = 1;
DECL_NOT_REALLY_EXTERN (fn) = 1;
DECL_DECLARED_INLINE_P (fn) = 1;
DECL_STATIC_FUNCTION_P (fn) = 1;
DECL_ARGUMENTS (fn) = fn_args;
for (tree arg = fn_args; arg; arg = DECL_CHAIN (arg))
{
/* Avoid duplicate -Wshadow warnings. */
DECL_NAME (arg) = NULL_TREE;
DECL_CONTEXT (arg) = fn;
}
if (nested_def)
DECL_INTERFACE_KNOWN (fn) = 1;
if (generic_lambda_p)
fn = add_inherited_template_parms (fn, DECL_TI_TEMPLATE (callop));
add_method (type, fn, NULL_TREE);
if (nested)
push_function_context ();
else
/* Still increment function_depth so that we don't GC in the
middle of an expression. */
++function_depth;
/* Generate the body of the thunk. */
start_preparsed_function (statfn, NULL_TREE,
SF_PRE_PARSED | SF_INCLASS_INLINE);
if (DECL_ONE_ONLY (statfn))
{
/* Put the thunk in the same comdat group as the call op. */
cgraph_node::get_create (statfn)->add_to_same_comdat_group
(cgraph_node::get_create (callop));
}
tree body = begin_function_body ();
tree compound_stmt = begin_compound_stmt (0);
if (!generic_lambda_p)
{
set_flags_from_callee (call);
if (MAYBE_CLASS_TYPE_P (TREE_TYPE (call)))
call = build_cplus_new (TREE_TYPE (call), call, tf_warning_or_error);
}
call = convert_from_reference (call);
finish_return_stmt (call);
finish_compound_stmt (compound_stmt);
finish_function_body (body);
fn = finish_function (/*inline*/2);
if (!generic_lambda_p)
expand_or_defer_fn (fn);
/* Generate the body of the conversion op. */
start_preparsed_function (convfn, NULL_TREE,
SF_PRE_PARSED | SF_INCLASS_INLINE);
body = begin_function_body ();
compound_stmt = begin_compound_stmt (0);
/* decl_needed_p needs to see that it's used. */
TREE_USED (statfn) = 1;
finish_return_stmt (decay_conversion (statfn, tf_warning_or_error));
finish_compound_stmt (compound_stmt);
finish_function_body (body);
fn = finish_function (/*inline*/2);
if (!generic_lambda_p)
expand_or_defer_fn (fn);
if (nested)
pop_function_context ();
else
--function_depth;
}
tree
build_expr_type_conversion (int desires, tree expr, bool complain)
{
tree basetype = TREE_TYPE (expr);
tree conv = NULL_TREE;
tree winner = NULL_TREE;
if (expr == null_node
&& (desires & WANT_INT)
&& !(desires & WANT_NULL))
warning (OPT_Wconversion, "converting NULL to non-pointer type");
basetype = TREE_TYPE (expr);
if (basetype == error_mark_node)
return error_mark_node;
if (! MAYBE_CLASS_TYPE_P (basetype))
switch (TREE_CODE (basetype))
{
case INTEGER_TYPE:
if ((desires & WANT_NULL) && null_ptr_cst_p (expr))
return expr;
/* else fall through... */
case BOOLEAN_TYPE:
return (desires & WANT_INT) ? expr : NULL_TREE;
case ENUMERAL_TYPE:
return (desires & WANT_ENUM) ? expr : NULL_TREE;
case REAL_TYPE:
return (desires & WANT_FLOAT) ? expr : NULL_TREE;
case POINTER_TYPE:
return (desires & WANT_POINTER) ? expr : NULL_TREE;
case FUNCTION_TYPE:
case ARRAY_TYPE:
return (desires & WANT_POINTER) ? decay_conversion (expr)
: NULL_TREE;
case VECTOR_TYPE:
if ((desires & WANT_VECTOR) == 0)
return NULL_TREE;
switch (TREE_CODE (TREE_TYPE (basetype)))
{
case INTEGER_TYPE:
case BOOLEAN_TYPE:
return (desires & WANT_INT) ? expr : NULL_TREE;
case ENUMERAL_TYPE:
return (desires & WANT_ENUM) ? expr : NULL_TREE;
case REAL_TYPE:
return (desires & WANT_FLOAT) ? expr : NULL_TREE;
default:
return NULL_TREE;
}
default:
return NULL_TREE;
}
/* The code for conversions from class type is currently only used for
delete expressions. Other expressions are handled by build_new_op. */
if (!complete_type_or_else (basetype, expr))
return error_mark_node;
if (!TYPE_HAS_CONVERSION (basetype))
return NULL_TREE;
for (conv = lookup_conversions (basetype); conv; conv = TREE_CHAIN (conv))
{
int win = 0;
tree candidate;
tree cand = TREE_VALUE (conv);
if (winner && winner == cand)
continue;
candidate = non_reference (TREE_TYPE (TREE_TYPE (cand)));
switch (TREE_CODE (candidate))
{
case BOOLEAN_TYPE:
case INTEGER_TYPE:
win = (desires & WANT_INT); break;
case ENUMERAL_TYPE:
win = (desires & WANT_ENUM); break;
case REAL_TYPE:
win = (desires & WANT_FLOAT); break;
case POINTER_TYPE:
win = (desires & WANT_POINTER); break;
case VECTOR_TYPE:
if ((desires & WANT_VECTOR) == 0)
break;
switch (TREE_CODE (TREE_TYPE (candidate)))
{
case BOOLEAN_TYPE:
case INTEGER_TYPE:
win = (desires & WANT_INT); break;
case ENUMERAL_TYPE:
win = (desires & WANT_ENUM); break;
case REAL_TYPE:
win = (desires & WANT_FLOAT); break;
default:
break;
}
break;
default:
break;
}
if (win)
{
if (winner)
{
if (complain)
{
error ("ambiguous default type conversion from %qT",
basetype);
error (" candidate conversions include %qD and %qD",
winner, cand);
}
return error_mark_node;
}
else
winner = cand;
}
}
if (winner)
{
tree type = non_reference (TREE_TYPE (TREE_TYPE (winner)));
return build_user_type_conversion (type, expr, LOOKUP_NORMAL);
}
return NULL_TREE;
}
static tree
tinfo_base_init (tree desc, tree target)
{
tree init = NULL_TREE;
tree name_decl;
tree vtable_ptr;
{
tree name_name;
/* Generate the NTBS array variable. */
tree name_type = build_cplus_array_type
(build_qualified_type (char_type_node, TYPE_QUAL_CONST),
NULL_TREE);
tree name_string = tinfo_name (target);
/* Determine the name of the variable -- and remember with which
type it is associated. */
name_name = mangle_typeinfo_string_for_type (target);
TREE_TYPE (name_name) = target;
name_decl = build_lang_decl (VAR_DECL, name_name, name_type);
SET_DECL_ASSEMBLER_NAME (name_decl, name_name);
DECL_ARTIFICIAL (name_decl) = 1;
DECL_IGNORED_P (name_decl) = 1;
TREE_READONLY (name_decl) = 1;
TREE_STATIC (name_decl) = 1;
DECL_EXTERNAL (name_decl) = 0;
DECL_TINFO_P (name_decl) = 1;
if (involves_incomplete_p (target))
{
TREE_PUBLIC (name_decl) = 0;
DECL_INTERFACE_KNOWN (name_decl) = 1;
}
else
set_linkage_according_to_type (target, name_decl);
import_export_decl (name_decl);
DECL_INITIAL (name_decl) = name_string;
mark_used (name_decl);
pushdecl_top_level_and_finish (name_decl, name_string);
}
vtable_ptr = TINFO_VTABLE_DECL (desc);
if (!vtable_ptr)
{
tree real_type;
push_nested_namespace (abi_node);
real_type = xref_tag (class_type, TINFO_REAL_NAME (desc),
/* APPLE LOCAL 4184203 */
/*tag_scope=*/ts_global, false);
pop_nested_namespace (abi_node);
if (!COMPLETE_TYPE_P (real_type))
{
/* We never saw a definition of this type, so we need to
tell the compiler that this is an exported class, as
indeed all of the __*_type_info classes are. */
SET_CLASSTYPE_INTERFACE_KNOWN (real_type);
CLASSTYPE_INTERFACE_ONLY (real_type) = 1;
}
vtable_ptr = get_vtable_decl (real_type, /*complete=*/1);
vtable_ptr = build_unary_op (ADDR_EXPR, vtable_ptr, 0);
/* We need to point into the middle of the vtable. */
vtable_ptr = build2
(PLUS_EXPR, TREE_TYPE (vtable_ptr), vtable_ptr,
size_binop (MULT_EXPR,
size_int (2 * TARGET_VTABLE_DATA_ENTRY_DISTANCE),
TYPE_SIZE_UNIT (vtable_entry_type)));
TINFO_VTABLE_DECL (desc) = vtable_ptr;
}
init = tree_cons (NULL_TREE, vtable_ptr, init);
init = tree_cons (NULL_TREE, decay_conversion (name_decl), init);
init = build_constructor (NULL_TREE, nreverse (init));
TREE_CONSTANT (init) = 1;
TREE_INVARIANT (init) = 1;
TREE_STATIC (init) = 1;
init = tree_cons (NULL_TREE, init, NULL_TREE);
return init;
}
