Type::type_trees.insert(val);
if (!ins.second && ins.first->second != NULL_TREE)
{
- this->tree_ = ins.first->second;
- return this->tree_;
+ if (gogo != NULL && gogo->named_types_are_converted())
+ this->tree_ = ins.first->second;
+ return ins.first->second;
}
tree t = this->get_tree_without_hash(gogo);
// which in turns uses an identical unnamed type. Use the tree
// we created earlier and ignore the one we just built.
t = ins.first->second;
+ if (gogo == NULL || !gogo->named_types_are_converted())
+ return t;
this->tree_ = t;
}
if (t == ptr_type_node && this->forward_declaration_type() != NULL)
return t;
+ if (gogo == NULL || !gogo->named_types_are_converted())
+ return t;
+
this->tree_ = t;
go_preserve_from_gc(t);
}
return Type::make_struct_type(sfl, bloc);
}
+// A list of builtin named types.
+
+std::vector<Named_type*> Type::named_builtin_types;
+
// Make a builtin named type.
Named_type*
{
source_location bloc = BUILTINS_LOCATION;
Named_object* no = Named_object::make_type(name, NULL, type, bloc);
- return no->type_value();
+ Named_type* ret = no->type_value();
+ Type::named_builtin_types.push_back(ret);
+ return ret;
+}
+
+// Convert the named builtin types.
+
+void
+Type::convert_builtin_named_types(Gogo* gogo)
+{
+ for (std::vector<Named_type*>::const_iterator p =
+ Type::named_builtin_types.begin();
+ p != Type::named_builtin_types.end();
+ ++p)
+ {
+ bool r = (*p)->verify();
+ gcc_assert(r);
+ (*p)->convert(gogo);
+ }
}
// Return the type of a type descriptor. We should really tie this to
gcc_assert(fntype != NULL);
const Typed_identifier_list* results = fntype->results();
gcc_assert(results != NULL && results->size() > 1);
-
- Struct_field_list* sfl = new Struct_field_list;
- for (Typed_identifier_list::const_iterator p = results->begin();
- p != results->end();
- ++p)
- {
- const std::string name = ((p->name().empty()
- || p->name() == Import::import_marker)
- ? "UNNAMED"
- : p->name());
- sfl->push_back(Struct_field(Typed_identifier(name, p->type(),
- this->call_->location())));
- }
- return Type::make_struct_type(sfl, this->call_->location())->get_tree(gogo);
+ tree fntype_tree = fntype->get_tree(gogo);
+ if (fntype_tree == error_mark_node)
+ return error_mark_node;
+ return TREE_TYPE(fntype_tree);
}
// Make a call result type.
{
tree field_trees = NULL_TREE;
tree* pp = &field_trees;
- bool has_pointer = false;
for (Struct_field_list::const_iterator p = this->fields_->begin();
p != this->fields_->end();
++p)
std::string name = Gogo::unpack_hidden_name(p->field_name());
tree name_tree = get_identifier_with_length(name.data(), name.length());
- // Don't follow pointers yet, so that we don't get confused by a
- // pointer to an array of this struct type.
- tree field_type_tree;
- if (p->type()->points_to() != NULL || p->type()->function_type() != NULL)
- {
- field_type_tree = ptr_type_node;
- has_pointer = true;
- }
- else
- {
- field_type_tree = p->type()->get_tree(gogo);
- if (field_type_tree == error_mark_node)
- return error_mark_node;
- }
+ tree field_type_tree = p->type()->get_tree(gogo);
+ if (field_type_tree == error_mark_node)
+ return error_mark_node;
+ gcc_assert(TYPE_SIZE(field_type_tree) != NULL_TREE);
tree field = build_decl(p->location(), FIELD_DECL, name_tree,
field_type_tree);
layout_type(type);
- if (has_pointer)
- {
- tree field = field_trees;
- for (Struct_field_list::const_iterator p = this->fields_->begin();
- p != this->fields_->end();
- ++p, field = DECL_CHAIN(field))
- {
- if (p->type()->points_to() != NULL
- || p->type()->function_type() != NULL)
- TREE_TYPE(field) = p->type()->get_tree(gogo);
- }
- }
-
return type;
}
-// Make sure that all structs which must be converted to the backend
-// representation before this one are in fact converted.
-
-void
-Struct_type::convert_prerequisites(Gogo* gogo)
-{
- for (std::vector<Named_type*>::const_iterator p
- = this->prerequisites_.begin();
- p != this->prerequisites_.end();
- ++p)
- (*p)->get_tree(gogo);
-}
-
// Initialize struct fields.
tree
|| length_tree == error_mark_node)
return error_mark_node;
+ gcc_assert(TYPE_SIZE(element_type_tree) != NULL_TREE);
+
length_tree = fold_convert(sizetype, length_tree);
// build_index_type takes the maximum index, which is one less than
Interface_type::do_get_tree(Gogo* gogo)
{
if (this->methods_ == NULL)
+ return Interface_type::empty_type_tree(gogo);
+ else
{
- // At the tree level, use the same type for all empty
- // interfaces. This lets us assign them to each other directly
- // without triggering GIMPLE type errors.
- tree dtype = Type::make_type_descriptor_type()->get_tree(gogo);
- dtype = build_pointer_type(build_qualified_type(dtype, TYPE_QUAL_CONST));
- static tree empty_interface;
- return Gogo::builtin_struct(&empty_interface, "__go_empty_interface",
- NULL_TREE, 2,
- "__type_descriptor",
- dtype,
- "__object",
- ptr_type_node);
+ tree t = Interface_type::non_empty_type_tree(this->location_);
+ return this->fill_in_tree(gogo, t);
}
-
- return this->fill_in_tree(gogo, make_node(RECORD_TYPE));
}
-// Fill in the tree for an interface type. This is used for named
-// interface types.
+// Return a singleton struct for an empty interface type. We use the
+// same type for all empty interfaces. This lets us assign them to
+// each other directly without triggering GIMPLE type errors.
tree
-Interface_type::fill_in_tree(Gogo* gogo, tree type)
+Interface_type::empty_type_tree(Gogo* gogo)
{
- gcc_assert(this->methods_ != NULL);
+ static tree empty_interface;
+ if (empty_interface != NULL_TREE)
+ return empty_interface;
+
+ tree dtype = Type::make_type_descriptor_type()->get_tree(gogo);
+ dtype = build_pointer_type(build_qualified_type(dtype, TYPE_QUAL_CONST));
+ return Gogo::builtin_struct(&empty_interface, "__go_empty_interface",
+ NULL_TREE, 2,
+ "__type_descriptor",
+ dtype,
+ "__object",
+ ptr_type_node);
+}
- // Because the methods may refer to the interface type itself, we
- // need to build the interface type first, and then update the
- // method pointer later.
+// Return a new struct for a non-empty interface type. The correct
+// values are filled in by fill_in_tree.
+
+tree
+Interface_type::non_empty_type_tree(source_location location)
+{
+ tree ret = make_node(RECORD_TYPE);
tree field_trees = NULL_TREE;
tree* pp = &field_trees;
tree name_tree = get_identifier("__methods");
- tree methods_field = build_decl(this->location_, FIELD_DECL, name_tree,
- ptr_type_node);
- DECL_CONTEXT(methods_field) = type;
- *pp = methods_field;
- pp = &DECL_CHAIN(methods_field);
+ tree field = build_decl(location, FIELD_DECL, name_tree, ptr_type_node);
+ DECL_CONTEXT(field) = ret;
+ *pp = field;
+ pp = &DECL_CHAIN(field);
name_tree = get_identifier("__object");
- tree field = build_decl(this->location_, FIELD_DECL, name_tree,
- ptr_type_node);
- DECL_CONTEXT(field) = type;
+ field = build_decl(location, FIELD_DECL, name_tree, ptr_type_node);
+ DECL_CONTEXT(field) = ret;
*pp = field;
- TYPE_FIELDS(type) = field_trees;
+ TYPE_FIELDS(ret) = field_trees;
- layout_type(type);
+ layout_type(ret);
+
+ return ret;
+}
+
+// Fill in the tree for an interface type. This is used for named
+// interface types.
+
+tree
+Interface_type::fill_in_tree(Gogo* gogo, tree type)
+{
+ gcc_assert(this->methods_ != NULL);
// Build the type of the table of methods.
tree method_table = make_node(RECORD_TYPE);
// The first field is a pointer to the type descriptor.
- name_tree = get_identifier("__type_descriptor");
+ tree name_tree = get_identifier("__type_descriptor");
tree dtype = Type::make_type_descriptor_type()->get_tree(gogo);
dtype = build_pointer_type(build_qualified_type(dtype, TYPE_QUAL_CONST));
- field = build_decl(this->location_, FIELD_DECL, name_tree, dtype);
+ tree field = build_decl(this->location_, FIELD_DECL, name_tree, dtype);
DECL_CONTEXT(field) = method_table;
TYPE_FIELDS(method_table) = field;
std::string last_name = "";
- pp = &DECL_CHAIN(field);
+ tree* pp = &DECL_CHAIN(field);
for (Typed_identifier_list::const_iterator p = this->methods_->begin();
p != this->methods_->end();
++p)
// Update the type of the __methods field from a generic pointer to
// a pointer to the method table.
- TREE_TYPE(methods_field) = build_pointer_type(method_table);
+ field = TYPE_FIELDS(type);
+ gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)), "__methods") == 0);
+
+ TREE_TYPE(field) = build_pointer_type(method_table);
return type;
}
class Find_type_use : public Traverse
{
public:
- Find_type_use(Type* find_type)
+ Find_type_use(Named_type* find_type)
: Traverse(traverse_types),
find_type_(find_type), found_(false)
{ }
private:
// The type we are looking for.
- Type* find_type_;
+ Named_type* find_type_;
// Whether we found the type.
bool found_;
};
int
Find_type_use::type(Type* type)
{
- if (this->find_type_ == type)
+ if (type->named_type() != NULL && this->find_type_ == type->named_type())
{
this->found_ = true;
return TRAVERSE_EXIT;
}
+
// It's OK if we see a reference to the type in any type which is
// essentially a pointer: a pointer, a slice, a function, a map, or
// a channel.
return TRAVERSE_SKIP_COMPONENTS;
}
+ // Otherwise, FIND_TYPE_ depends on TYPE, in the sense that we need
+ // to convert TYPE to the backend representation before we convert
+ // FIND_TYPE_.
+ if (type->named_type() != NULL)
+ {
+ switch (type->base()->classification())
+ {
+ case Type::TYPE_ERROR:
+ case Type::TYPE_BOOLEAN:
+ case Type::TYPE_INTEGER:
+ case Type::TYPE_FLOAT:
+ case Type::TYPE_COMPLEX:
+ case Type::TYPE_STRING:
+ case Type::TYPE_NIL:
+ break;
+
+ case Type::TYPE_ARRAY:
+ case Type::TYPE_STRUCT:
+ this->find_type_->add_dependency(type->named_type());
+ break;
+
+ case Type::TYPE_VOID:
+ case Type::TYPE_SINK:
+ case Type::TYPE_FUNCTION:
+ case Type::TYPE_POINTER:
+ case Type::TYPE_CALL_MULTIPLE_RESULT:
+ case Type::TYPE_MAP:
+ case Type::TYPE_CHANNEL:
+ case Type::TYPE_INTERFACE:
+ case Type::TYPE_NAMED:
+ case Type::TYPE_FORWARD:
+ default:
+ gcc_unreachable();
+ }
+ }
+
return TRAVERSE_CONTINUE;
}
return false;
}
- // If this is a struct, then if any of the fields of the struct
- // themselves have struct type, or array of struct type, then this
- // struct must be converted to the backend representation before the
- // field's type is converted. That may seem backward, but it works
- // because if the field's type refers to this one, e.g., via a
- // pointer, then the conversion process will pick up the half-built
- // struct and do the right thing.
- if (this->struct_type() != NULL)
- {
- const Struct_field_list* fields = this->struct_type()->fields();
- for (Struct_field_list::const_iterator p = fields->begin();
- p != fields->end();
- ++p)
- {
- Struct_type* st = p->type()->struct_type();
- if (st != NULL)
- st->add_prerequisite(this);
- else
- {
- Array_type* at = p->type()->array_type();
- if (at != NULL && !at->is_open_array_type())
- {
- st = at->element_type()->struct_type();
- if (st != NULL)
- st->add_prerequisite(this);
- }
- }
- }
- }
-
return true;
}
return ret;
}
-// Get a tree for a named type.
+// Convert a named type to the backend representation. In order to
+// get dependencies right, we fill in a dummy structure for this type,
+// then convert all the dependencies, then complete this type. When
+// this function is complete, the size of the type is known.
-tree
-Named_type::do_get_tree(Gogo* gogo)
+void
+Named_type::convert(Gogo* gogo)
+{
+ if (this->is_error_ || this->is_converted_)
+ return;
+
+ this->create_placeholder(gogo);
+
+ // Convert all the dependencies. If they refer indirectly back to
+ // this type, they will pick up the intermediate tree we just
+ // created.
+ for (std::vector<Named_type*>::const_iterator p = this->dependencies_.begin();
+ p != this->dependencies_.end();
+ ++p)
+ (*p)->convert(gogo);
+
+ // Complete this type.
+ tree t = this->named_tree_;
+ Type* base = this->type_->base();
+ switch (base->classification())
+ {
+ case TYPE_VOID:
+ case TYPE_BOOLEAN:
+ case TYPE_INTEGER:
+ case TYPE_FLOAT:
+ case TYPE_COMPLEX:
+ case TYPE_STRING:
+ case TYPE_NIL:
+ break;
+
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ break;
+
+ case TYPE_FUNCTION:
+ case TYPE_POINTER:
+ // The size of these types is already correct.
+ break;
+
+ case TYPE_STRUCT:
+ t = base->struct_type()->fill_in_tree(gogo, t);
+ break;
+
+ case TYPE_ARRAY:
+ if (!base->is_open_array_type())
+ t = base->array_type()->fill_in_array_tree(gogo, t);
+ break;
+
+ case TYPE_INTERFACE:
+ if (!base->interface_type()->is_empty())
+ t = base->interface_type()->fill_in_tree(gogo, t);
+ break;
+
+ case TYPE_ERROR:
+ return;
+
+ default:
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
+ gcc_unreachable();
+ }
+
+ this->named_tree_ = t;
+
+ if (t == error_mark_node)
+ this->is_error_ = true;
+ else
+ gcc_assert(TYPE_SIZE(t) != NULL_TREE);
+
+ this->is_converted_ = true;
+}
+
+// Create the placeholder for a named type. This is the first step in
+// converting to the backend representation.
+
+void
+Named_type::create_placeholder(Gogo* gogo)
{
if (this->is_error_)
- return error_mark_node;
+ this->named_tree_ = error_mark_node;
- // Go permits types to refer to themselves in various ways. Break
- // the recursion here.
+ if (this->named_tree_ != NULL_TREE)
+ return;
+
+ // Create the structure for this type. Note that because we call
+ // base() here, we don't attempt to represent a named type defined
+ // as another named type. Instead both named types will point to
+ // different base representations.
+ Type* base = this->type_->base();
tree t;
- switch (this->type_->forwarded()->classification())
+ switch (base->classification())
{
case TYPE_ERROR:
- return error_mark_node;
+ this->is_error_ = true;
+ this->named_tree_ = error_mark_node;
+ return;
case TYPE_VOID:
case TYPE_BOOLEAN:
case TYPE_COMPLEX:
case TYPE_STRING:
case TYPE_NIL:
- // These types can not refer to themselves.
- case TYPE_MAP:
- case TYPE_CHANNEL:
- // All maps and channels have the same type in GENERIC.
- t = Type::get_named_type_tree(gogo, this->type_);
+ // These are simple basic types, we can just create them
+ // directly.
+ t = Type::get_named_type_tree(gogo, base);
if (t == error_mark_node)
- return error_mark_node;
- // Build a copy to set TYPE_NAME.
+ {
+ this->is_error_ = true;
+ this->named_tree_ = error_mark_node;
+ return;
+ }
t = build_variant_type_copy(t);
break;
- case TYPE_FUNCTION:
- // GENERIC can't handle a pointer to a function type whose
- // return type is a pointer to the function type itself. It
- // goes into an infinite loop when walking the types.
- if (this->seen_ > 0)
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ // All maps and channels have the same type in GENERIC.
+ t = Type::get_named_type_tree(gogo, base);
+ if (t == error_mark_node)
{
- Function_type* fntype = this->type_->function_type();
- if (fntype->results() != NULL
- && fntype->results()->size() == 1
- && fntype->results()->front().type()->forwarded() == this)
- return ptr_type_node;
-
- // We can legitimately see ourselves here twice when a named
- // type is defined using a struct which refers to the named
- // type. If we see ourselves too often we are in a loop.
- if (this->seen_ > 3)
- return ptr_type_node;
+ this->is_error_ = true;
+ this->named_tree_ = error_mark_node;
+ return;
}
- ++this->seen_;
- t = Type::get_named_type_tree(gogo, this->type_);
- --this->seen_;
- if (t == error_mark_node)
- return error_mark_node;
t = build_variant_type_copy(t);
break;
+ case TYPE_FUNCTION:
case TYPE_POINTER:
- // Don't recur infinitely if a pointer type refers to itself.
- // Ideally we would build a circular data structure here, but
- // GENERIC can't handle them.
- if (this->seen_ > 0)
- {
- if (this->type_->points_to()->forwarded() == this)
- return ptr_type_node;
-
- if (this->seen_ > 3)
- return ptr_type_node;
- }
- ++this->seen_;
- t = Type::get_named_type_tree(gogo, this->type_);
- --this->seen_;
- if (t == error_mark_node)
- return error_mark_node;
- t = build_variant_type_copy(t);
+ t = build_variant_type_copy(ptr_type_node);
break;
case TYPE_STRUCT:
- // If there are structs which must be converted first, do them.
- if (this->seen_ == 0)
- {
- ++this->seen_;
- this->type_->struct_type()->convert_prerequisites(gogo);
- --this->seen_;
- }
-
- if (this->named_tree_ != NULL_TREE)
- return this->named_tree_;
-
t = make_node(RECORD_TYPE);
- this->named_tree_ = t;
- t = this->type_->struct_type()->fill_in_tree(gogo, t);
- if (t == error_mark_node)
- {
- this->named_tree_ = error_mark_node;
- return error_mark_node;
- }
break;
case TYPE_ARRAY:
- if (this->named_tree_ != NULL_TREE)
- return this->named_tree_;
- if (!this->is_open_array_type())
- {
- t = make_node(ARRAY_TYPE);
- this->named_tree_ = t;
- t = this->type_->array_type()->fill_in_array_tree(gogo, t);
- }
+ if (base->is_open_array_type())
+ t = gogo->slice_type_tree(void_type_node);
else
- {
- t = gogo->slice_type_tree(void_type_node);
- this->named_tree_ = t;
- t = this->type_->array_type()->fill_in_slice_tree(gogo, t);
- }
- if (t == error_mark_node)
- return error_mark_node;
- t = build_variant_type_copy(t);
+ t = make_node(ARRAY_TYPE);
break;
case TYPE_INTERFACE:
- if (this->type_->interface_type()->is_empty())
+ if (base->interface_type()->is_empty())
{
- t = Type::get_named_type_tree(gogo, this->type_);
- if (t == error_mark_node)
- return error_mark_node;
+ t = Interface_type::empty_type_tree(gogo);
t = build_variant_type_copy(t);
}
else
{
- if (this->named_tree_ != NULL_TREE)
- return this->named_tree_;
- t = make_node(RECORD_TYPE);
- this->named_tree_ = t;
- t = this->type_->interface_type()->fill_in_tree(gogo, t);
- if (t == error_mark_node)
- {
- this->named_tree_ = error_mark_node;
- return error_mark_node;
- }
+ source_location loc = base->interface_type()->location();
+ t = Interface_type::non_empty_type_tree(loc);
}
break;
- case TYPE_NAMED:
- {
- // When a named type T1 is defined as another named type T2,
- // the definition must simply be "type T1 T2". If the
- // definition of T2 may refer to T1, then we must simply
- // return the type for T2 here. It's not precisely correct,
- // but it's as close as we can get with GENERIC.
- ++this->seen_;
- t = Type::get_named_type_tree(gogo, this->type_);
- --this->seen_;
- if (this->seen_ > 0)
- return t;
- if (t == error_mark_node)
- return error_mark_node;
- t = build_variant_type_copy(t);
- }
- break;
-
- case TYPE_FORWARD:
- // An undefined forwarding type. Make sure the error is
- // emitted.
- this->type_->forward_declaration_type()->real_type();
- return error_mark_node;
-
default:
case TYPE_SINK:
case TYPE_CALL_MULTIPLE_RESULT:
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
gcc_unreachable();
}
+ // Create the named type.
+
tree id = this->named_object_->get_id(gogo);
tree decl = build_decl(this->location_, TYPE_DECL, id, t);
TYPE_NAME(t) = decl;
- return t;
+ this->named_tree_ = t;
+}
+
+// Get a tree for a named type.
+
+tree
+Named_type::do_get_tree(Gogo* gogo)
+{
+ if (this->is_error_)
+ return error_mark_node;
+
+ tree t = this->named_tree_;
+
+ // FIXME: GOGO can be NULL when called from go_type_for_size, which
+ // is only used for basic types.
+ if (gogo == NULL || !gogo->named_types_are_converted())
+ {
+ // We have not completed converting named types. NAMED_TREE_ is
+ // a placeholder and we shouldn't do anything further.
+ if (t != NULL_TREE)
+ return t;
+
+ // We don't build dependencies for types whose sizes do not
+ // change or are not relevant, so we may see them here while
+ // converting types.
+ this->create_placeholder(gogo);
+ t = this->named_tree_;
+ gcc_assert(t != NULL_TREE);
+ return t;
+ }
+
+ // We are not converting types. This should only be called if the
+ // type has already been converted.
+ gcc_assert(this->is_converted_);
+ gcc_assert(t != NULL_TREE && TYPE_SIZE(t) != NULL_TREE);
+
+ // Complete the tree.
+ Type* base = this->type_->base();
+ tree t1;
+ switch (base->classification())
+ {
+ case TYPE_ERROR:
+ return error_mark_node;
+
+ case TYPE_VOID:
+ case TYPE_BOOLEAN:
+ case TYPE_INTEGER:
+ case TYPE_FLOAT:
+ case TYPE_COMPLEX:
+ case TYPE_STRING:
+ case TYPE_NIL:
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ case TYPE_STRUCT:
+ case TYPE_INTERFACE:
+ return t;
+
+ case TYPE_FUNCTION:
+ // Don't build a circular data structure. GENERIC can't handle
+ // it.
+ if (this->seen_ > 0)
+ {
+ this->is_circular_ = true;
+ return ptr_type_node;
+ }
+ ++this->seen_;
+ t1 = Type::get_named_type_tree(gogo, base);
+ --this->seen_;
+ if (t1 == error_mark_node)
+ return error_mark_node;
+ if (this->is_circular_)
+ t1 = ptr_type_node;
+ gcc_assert(t != NULL_TREE && TREE_CODE(t) == POINTER_TYPE);
+ gcc_assert(TREE_CODE(t1) == POINTER_TYPE);
+ TREE_TYPE(t) = TREE_TYPE(t1);
+ return t;
+
+ case TYPE_POINTER:
+ // Don't build a circular data structure. GENERIC can't handle
+ // it.
+ if (this->seen_ > 0)
+ {
+ this->is_circular_ = true;
+ return ptr_type_node;
+ }
+ ++this->seen_;
+ t1 = Type::get_named_type_tree(gogo, base);
+ --this->seen_;
+ if (t1 == error_mark_node)
+ return error_mark_node;
+ if (this->is_circular_)
+ t1 = ptr_type_node;
+ gcc_assert(t != NULL_TREE && TREE_CODE(t) == POINTER_TYPE);
+ gcc_assert(TREE_CODE(t1) == POINTER_TYPE);
+ TREE_TYPE(t) = TREE_TYPE(t1);
+ return t;
+
+ case TYPE_ARRAY:
+ if (base->is_open_array_type())
+ {
+ if (this->seen_ > 0)
+ return t;
+ else
+ {
+ ++this->seen_;
+ t = base->array_type()->fill_in_slice_tree(gogo, t);
+ --this->seen_;
+ }
+ }
+ return t;
+
+ default:
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
+ gcc_unreachable();
+ }
+
+ gcc_unreachable();
}
// Build a type descriptor for a named type.
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