#include "statements.h"
#include "export.h"
#include "import.h"
+#include "backend.h"
#include "types.h"
+// Forward declarations so that we don't have to make types.h #include
+// backend.h.
+
+static void
+get_backend_struct_fields(Gogo* gogo, const Struct_field_list* fields,
+ bool use_placeholder,
+ std::vector<Backend::Btyped_identifier>* bfields);
+
+static void
+get_backend_slice_fields(Gogo* gogo, Array_type* type, bool use_placeholder,
+ std::vector<Backend::Btyped_identifier>* bfields);
+
+static void
+get_backend_interface_fields(Gogo* gogo, Interface_type* type,
+ bool use_placeholder,
+ std::vector<Backend::Btyped_identifier>* bfields);
+
// Class Type.
Type::Type(Type_classification classification)
- : classification_(classification), tree_(NULL_TREE),
- type_descriptor_decl_(NULL_TREE)
+ : classification_(classification), btype_is_placeholder_(false),
+ btype_(NULL), type_descriptor_var_(NULL)
{
}
return this->base()->is_basic_type();
default:
- gcc_unreachable();
+ go_unreachable();
}
}
Type*
Type::make_non_abstract_type()
{
- gcc_assert(this->is_abstract());
+ go_assert(this->is_abstract());
switch (this->classification())
{
case TYPE_INTEGER:
- return Type::lookup_integer_type("int");
+ if (this->integer_type()->is_rune())
+ return Type::lookup_integer_type("int32");
+ else
+ return Type::lookup_integer_type("int");
case TYPE_FLOAT:
return Type::lookup_float_type("float64");
case TYPE_COMPLEX:
case TYPE_BOOLEAN:
return Type::lookup_bool_type();
default:
- gcc_unreachable();
+ go_unreachable();
}
}
// Return whether this is an open array type.
bool
-Type::is_open_array_type() const
+Type::is_slice_type() const
{
return this->array_type() != NULL && this->array_type()->length() == NULL;
}
int
Type::traverse(Type* type, Traverse* traverse)
{
- gcc_assert((traverse->traverse_mask() & Traverse::traverse_types) != 0
+ go_assert((traverse->traverse_mask() & Traverse::traverse_types) != 0
|| (traverse->traverse_mask()
& Traverse::traverse_expressions) != 0);
if (traverse->remember_type(type))
t1 = t1->forwarded();
t2 = t2->forwarded();
+ // Ignore aliases for purposes of type identity.
+ if (t1->named_type() != NULL && t1->named_type()->is_alias())
+ t1 = t1->named_type()->real_type();
+ if (t2->named_type() != NULL && t2->named_type()->is_alias())
+ t2 = t2->named_type()->real_type();
+
if (t1 == t2)
return true;
return false;
default:
- gcc_unreachable();
+ go_unreachable();
}
}
if (lhs->is_nil_type()
&& (rhs->points_to() != NULL
|| rhs->interface_type() != NULL
- || rhs->is_open_array_type()
+ || rhs->is_slice_type()
|| rhs->map_type() != NULL
|| rhs->channel_type() != NULL
|| rhs->function_type() != NULL))
if (rhs->is_nil_type()
&& (lhs->points_to() != NULL
|| lhs->interface_type() != NULL
- || lhs->is_open_array_type()
+ || lhs->is_slice_type()
|| lhs->map_type() != NULL
|| lhs->channel_type() != NULL
|| lhs->function_type() != NULL))
return false;
}
-// Return true if a value with type RHS may be assigned to a variable
-// with type LHS. If REASON is not NULL, set *REASON to the reason
-// the types are not assignable.
+// Return true if a value with type T1 may be compared with a value of
+// type T2. IS_EQUALITY_OP is true for == or !=, false for <, etc.
bool
-Type::are_assignable(const Type* lhs, const Type* rhs, std::string* reason)
+Type::are_compatible_for_comparison(bool is_equality_op, const Type *t1,
+ const Type *t2, std::string *reason)
{
- // Do some checks first. Make sure the types are defined.
- if (rhs != NULL
- && rhs->forwarded()->forward_declaration_type() == NULL
- && rhs->is_void_type())
+ if (t1 != t2
+ && !Type::are_assignable(t1, t2, NULL)
+ && !Type::are_assignable(t2, t1, NULL))
{
if (reason != NULL)
- *reason = "non-value used as value";
+ *reason = "incompatible types in binary expression";
return false;
}
- if (lhs != NULL && lhs->forwarded()->forward_declaration_type() == NULL)
+ if (!is_equality_op)
+ {
+ if (t1->integer_type() == NULL
+ && t1->float_type() == NULL
+ && !t1->is_string_type())
+ {
+ if (reason != NULL)
+ *reason = _("invalid comparison of non-ordered type");
+ return false;
+ }
+ }
+ else if (t1->is_slice_type()
+ || t1->map_type() != NULL
+ || t1->function_type() != NULL
+ || t2->is_slice_type()
+ || t2->map_type() != NULL
+ || t2->function_type() != NULL)
+ {
+ if (!t1->is_nil_type() && !t2->is_nil_type())
+ {
+ if (reason != NULL)
+ {
+ if (t1->is_slice_type() || t2->is_slice_type())
+ *reason = _("slice can only be compared to nil");
+ else if (t1->map_type() != NULL || t2->map_type() != NULL)
+ *reason = _("map can only be compared to nil");
+ else
+ *reason = _("func can only be compared to nil");
+
+ // Match 6g error messages.
+ if (t1->interface_type() != NULL || t2->interface_type() != NULL)
+ {
+ char buf[200];
+ snprintf(buf, sizeof buf, _("invalid operation (%s)"),
+ reason->c_str());
+ *reason = buf;
+ }
+ }
+ return false;
+ }
+ }
+ else
+ {
+ if (!t1->is_boolean_type()
+ && t1->integer_type() == NULL
+ && t1->float_type() == NULL
+ && t1->complex_type() == NULL
+ && !t1->is_string_type()
+ && t1->points_to() == NULL
+ && t1->channel_type() == NULL
+ && t1->interface_type() == NULL
+ && t1->struct_type() == NULL
+ && t1->array_type() == NULL
+ && !t1->is_nil_type())
+ {
+ if (reason != NULL)
+ *reason = _("invalid comparison of non-comparable type");
+ return false;
+ }
+
+ if (t1->named_type() != NULL)
+ return t1->named_type()->named_type_is_comparable(reason);
+ else if (t2->named_type() != NULL)
+ return t2->named_type()->named_type_is_comparable(reason);
+ else if (t1->struct_type() != NULL)
+ {
+ const Struct_field_list* fields = t1->struct_type()->fields();
+ for (Struct_field_list::const_iterator p = fields->begin();
+ p != fields->end();
+ ++p)
+ {
+ if (!p->type()->is_comparable())
+ {
+ if (reason != NULL)
+ *reason = _("invalid comparison of non-comparable struct");
+ return false;
+ }
+ }
+ }
+ else if (t1->array_type() != NULL)
+ {
+ if (t1->array_type()->length()->is_nil_expression()
+ || !t1->array_type()->element_type()->is_comparable())
+ {
+ if (reason != NULL)
+ *reason = _("invalid comparison of non-comparable array");
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+// Return true if a value with type RHS may be assigned to a variable
+// with type LHS. If CHECK_HIDDEN_FIELDS is true, check whether any
+// hidden fields are modified. If REASON is not NULL, set *REASON to
+// the reason the types are not assignable.
+
+bool
+Type::are_assignable_check_hidden(const Type* lhs, const Type* rhs,
+ bool check_hidden_fields,
+ std::string* reason)
+{
+ // Do some checks first. Make sure the types are defined.
+ if (rhs != NULL && !rhs->is_undefined())
+ {
+ if (rhs->is_void_type())
+ {
+ if (reason != NULL)
+ *reason = "non-value used as value";
+ return false;
+ }
+ if (rhs->is_call_multiple_result_type())
+ {
+ if (reason != NULL)
+ reason->assign(_("multiple value function call in "
+ "single value context"));
+ return false;
+ }
+ }
+
+ if (lhs != NULL && !lhs->is_undefined())
{
// Any value may be assigned to the blank identifier.
if (lhs->is_sink_type())
// All fields of a struct must be exported, or the assignment
// must be in the same package.
- if (rhs != NULL && rhs->forwarded()->forward_declaration_type() == NULL)
+ if (check_hidden_fields && rhs != NULL && !rhs->is_undefined())
{
if (lhs->has_hidden_fields(NULL, reason)
|| rhs->has_hidden_fields(NULL, reason))
if (rhs->is_nil_type()
&& (lhs->points_to() != NULL
|| lhs->function_type() != NULL
- || lhs->is_open_array_type()
+ || lhs->is_slice_type()
|| lhs->map_type() != NULL
|| lhs->channel_type() != NULL
|| lhs->interface_type() != NULL))
{
if (rhs->interface_type() != NULL)
reason->assign(_("need explicit conversion"));
- else if (rhs->is_call_multiple_result_type())
- reason->assign(_("multiple value function call in "
- "single value context"));
else if (lhs->named_type() != NULL && rhs->named_type() != NULL)
{
size_t len = (lhs->named_type()->name().length()
return false;
}
+// Return true if a value with type RHS may be assigned to a variable
+// with type LHS. If REASON is not NULL, set *REASON to the reason
+// the types are not assignable.
+
+bool
+Type::are_assignable(const Type* lhs, const Type* rhs, std::string* reason)
+{
+ return Type::are_assignable_check_hidden(lhs, rhs, false, reason);
+}
+
+// Like are_assignable but don't check for hidden fields.
+
+bool
+Type::are_assignable_hidden_ok(const Type* lhs, const Type* rhs,
+ std::string* reason)
+{
+ return Type::are_assignable_check_hidden(lhs, rhs, false, reason);
+}
+
// Return true if a value with type RHS may be converted to type LHS.
// If REASON is not NULL, set *REASON to the reason the types are not
// convertible.
if (lhs->complex_type() != NULL && rhs->complex_type() != NULL)
return true;
- // An integer, or []byte, or []int, may be converted to a string.
+ // An integer, or []byte, or []rune, may be converted to a string.
if (lhs->is_string_type())
{
if (rhs->integer_type() != NULL)
return true;
- if (rhs->is_open_array_type() && rhs->named_type() == NULL)
+ if (rhs->is_slice_type())
{
const Type* e = rhs->array_type()->element_type()->forwarded();
if (e->integer_type() != NULL
- && (e == Type::lookup_integer_type("uint8")
- || e == Type::lookup_integer_type("int")))
+ && (e->integer_type()->is_byte()
+ || e->integer_type()->is_rune()))
return true;
}
}
- // A string may be converted to []byte or []int.
- if (rhs->is_string_type()
- && lhs->is_open_array_type()
- && lhs->named_type() == NULL)
+ // A string may be converted to []byte or []rune.
+ if (rhs->is_string_type() && lhs->is_slice_type())
{
const Type* e = lhs->array_type()->element_type()->forwarded();
if (e->integer_type() != NULL
- && (e == Type::lookup_integer_type("uint8")
- || e == Type::lookup_integer_type("int")))
+ && (e->integer_type()->is_byte() || e->integer_type()->is_rune()))
return true;
}
return h;
}
-// Default check for the expression passed to make. Any type which
-// may be used with make implements its own version of this.
+// A hash table mapping unnamed types to the backend representation of
+// those types.
-bool
-Type::do_check_make_expression(Expression_list*, source_location)
+Type::Type_btypes Type::type_btypes;
+
+// Return a tree representing this type.
+
+Btype*
+Type::get_backend(Gogo* gogo)
{
- gcc_unreachable();
+ if (this->btype_ != NULL)
+ {
+ if (this->btype_is_placeholder_ && gogo->named_types_are_converted())
+ this->finish_backend(gogo);
+ return this->btype_;
+ }
+
+ if (this->forward_declaration_type() != NULL
+ || this->named_type() != NULL)
+ return this->get_btype_without_hash(gogo);
+
+ if (this->is_error_type())
+ return gogo->backend()->error_type();
+
+ // To avoid confusing the backend, translate all identical Go types
+ // to the same backend representation. We use a hash table to do
+ // that. There is no need to use the hash table for named types, as
+ // named types are only identical to themselves.
+
+ std::pair<Type*, Btype*> val(this, NULL);
+ std::pair<Type_btypes::iterator, bool> ins =
+ Type::type_btypes.insert(val);
+ if (!ins.second && ins.first->second != NULL)
+ {
+ if (gogo != NULL && gogo->named_types_are_converted())
+ this->btype_ = ins.first->second;
+ return ins.first->second;
+ }
+
+ Btype* bt = this->get_btype_without_hash(gogo);
+
+ if (ins.first->second == NULL)
+ ins.first->second = bt;
+ else
+ {
+ // We have already created a backend representation for this
+ // type. This can happen when an unnamed type is defined using
+ // a named type which in turns uses an identical unnamed type.
+ // Use the tree we created earlier and ignore the one we just
+ // built.
+ bt = ins.first->second;
+ if (gogo == NULL || !gogo->named_types_are_converted())
+ return bt;
+ this->btype_ = bt;
+ }
+
+ return bt;
}
-// Return whether an expression has an integer value. Report an error
-// if not. This is used when handling calls to the predeclared make
-// function.
+// Return the backend representation for a type without looking in the
+// hash table for identical types. This is used for named types,
+// since a named type is never identical to any other type.
-bool
-Type::check_int_value(Expression* e, const char* errmsg,
- source_location location)
+Btype*
+Type::get_btype_without_hash(Gogo* gogo)
{
- if (e->type()->integer_type() != NULL)
- return true;
-
- // Check for a floating point constant with integer value.
- mpfr_t fval;
- mpfr_init(fval);
+ if (this->btype_ == NULL)
+ {
+ Btype* bt = this->do_get_backend(gogo);
- Type* dummy;
- if (e->float_constant_value(fval, &dummy))
+ // For a recursive function or pointer type, we will temporarily
+ // return a circular pointer type during the recursion. We
+ // don't want to record that for a forwarding type, as it may
+ // confuse us later.
+ if (this->forward_declaration_type() != NULL
+ && gogo->backend()->is_circular_pointer_type(bt))
+ return bt;
+
+ if (gogo == NULL || !gogo->named_types_are_converted())
+ return bt;
+
+ this->btype_ = bt;
+ }
+ return this->btype_;
+}
+
+// Get the backend representation of a type without forcing the
+// creation of the backend representation of all supporting types.
+// This will return a backend type that has the correct size but may
+// be incomplete. E.g., a pointer will just be a placeholder pointer,
+// and will not contain the final representation of the type to which
+// it points. This is used while converting all named types to the
+// backend representation, to avoid problems with indirect references
+// to types which are not yet complete. When this is called, the
+// sizes of all direct references (e.g., a struct field) should be
+// known, but the sizes of indirect references (e.g., the type to
+// which a pointer points) may not.
+
+Btype*
+Type::get_backend_placeholder(Gogo* gogo)
+{
+ if (gogo->named_types_are_converted())
+ return this->get_backend(gogo);
+ if (this->btype_ != NULL)
+ return this->btype_;
+
+ Btype* bt;
+ switch (this->classification_)
{
- mpz_t ival;
- mpz_init(ival);
+ case TYPE_ERROR:
+ case TYPE_VOID:
+ case TYPE_BOOLEAN:
+ case TYPE_INTEGER:
+ case TYPE_FLOAT:
+ case TYPE_COMPLEX:
+ case TYPE_STRING:
+ case TYPE_NIL:
+ // These are simple types that can just be created directly.
+ return this->get_backend(gogo);
+
+ case TYPE_FUNCTION:
+ {
+ Location loc = this->function_type()->location();
+ bt = gogo->backend()->placeholder_pointer_type("", loc, true);
+ }
+ break;
- bool ok = false;
+ case TYPE_POINTER:
+ {
+ Location loc = Linemap::unknown_location();
+ bt = gogo->backend()->placeholder_pointer_type("", loc, false);
+ }
+ break;
- mpfr_clear_overflow();
- mpfr_clear_erangeflag();
- mpfr_get_z(ival, fval, GMP_RNDN);
- if (!mpfr_overflow_p()
- && !mpfr_erangeflag_p()
- && mpz_sgn(ival) >= 0)
+ case TYPE_STRUCT:
+ // We don't have to make the struct itself be a placeholder. We
+ // are promised that we know the sizes of the struct fields.
+ // But we may have to use a placeholder for any particular
+ // struct field.
+ {
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_struct_fields(gogo, this->struct_type()->fields(),
+ true, &bfields);
+ bt = gogo->backend()->struct_type(bfields);
+ }
+ break;
+
+ case TYPE_ARRAY:
+ if (this->is_slice_type())
{
- Named_type* ntype = Type::lookup_integer_type("int");
- Integer_type* inttype = ntype->integer_type();
- mpz_t max;
- mpz_init_set_ui(max, 1);
- mpz_mul_2exp(max, max, inttype->bits() - 1);
- ok = mpz_cmp(ival, max) < 0;
- mpz_clear(max);
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_slice_fields(gogo, this->array_type(), true, &bfields);
+ bt = gogo->backend()->struct_type(bfields);
}
- mpz_clear(ival);
+ else
+ {
+ Btype* element = this->array_type()->get_backend_element(gogo, true);
+ Bexpression* len = this->array_type()->get_backend_length(gogo);
+ bt = gogo->backend()->array_type(element, len);
+ }
+ break;
+
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ // All maps and channels have the same backend representation.
+ return this->get_backend(gogo);
- if (ok)
+ case TYPE_INTERFACE:
+ if (this->interface_type()->is_empty())
+ return Interface_type::get_backend_empty_interface_type(gogo);
+ else
{
- mpfr_clear(fval);
- return true;
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_interface_fields(gogo, this->interface_type(), true,
+ &bfields);
+ bt = gogo->backend()->struct_type(bfields);
}
- }
+ break;
- mpfr_clear(fval);
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
+ // Named types keep track of their own dependencies and manage
+ // their own placeholders.
+ return this->get_backend(gogo);
- error_at(location, "%s", errmsg);
- return false;
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
+ default:
+ go_unreachable();
+ }
+
+ this->btype_ = bt;
+ this->btype_is_placeholder_ = true;
+ return bt;
}
-// A hash table mapping unnamed types to trees.
+// Complete the backend representation. This is called for a type
+// using a placeholder type.
-Type::Type_trees Type::type_trees;
+void
+Type::finish_backend(Gogo* gogo)
+{
+ go_assert(this->btype_ != NULL);
+ if (!this->btype_is_placeholder_)
+ return;
-// Return a tree representing this type.
+ switch (this->classification_)
+ {
+ case TYPE_ERROR:
+ case TYPE_VOID:
+ case TYPE_BOOLEAN:
+ case TYPE_INTEGER:
+ case TYPE_FLOAT:
+ case TYPE_COMPLEX:
+ case TYPE_STRING:
+ case TYPE_NIL:
+ go_unreachable();
-tree
-Type::get_tree(Gogo* gogo)
-{
- if (this->tree_ != NULL)
- return this->tree_;
+ case TYPE_FUNCTION:
+ {
+ Btype* bt = this->do_get_backend(gogo);
+ if (!gogo->backend()->set_placeholder_function_type(this->btype_, bt))
+ go_assert(saw_errors());
+ }
+ break;
- if (this->forward_declaration_type() != NULL
- || this->named_type() != NULL)
- return this->get_tree_without_hash(gogo);
+ case TYPE_POINTER:
+ {
+ Btype* bt = this->do_get_backend(gogo);
+ if (!gogo->backend()->set_placeholder_pointer_type(this->btype_, bt))
+ go_assert(saw_errors());
+ }
+ break;
- if (this->is_error_type())
- return error_mark_node;
+ case TYPE_STRUCT:
+ // The struct type itself is done, but we have to make sure that
+ // all the field types are converted.
+ this->struct_type()->finish_backend_fields(gogo);
+ break;
- // To avoid confusing GIMPLE, we need to translate all identical Go
- // types to the same GIMPLE type. We use a hash table to do that.
- // There is no need to use the hash table for named types, as named
- // types are only identical to themselves.
+ case TYPE_ARRAY:
+ // The array type itself is done, but make sure the element type
+ // is converted.
+ this->array_type()->finish_backend_element(gogo);
+ break;
+
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ go_unreachable();
- std::pair<Type*, tree> val(this, NULL);
- std::pair<Type_trees::iterator, bool> ins =
- Type::type_trees.insert(val);
- if (!ins.second && ins.first->second != NULL_TREE)
- {
- this->tree_ = ins.first->second;
- return this->tree_;
- }
+ case TYPE_INTERFACE:
+ // The interface type itself is done, but make sure the method
+ // types are converted.
+ this->interface_type()->finish_backend_methods(gogo);
+ break;
- tree t = this->get_tree_without_hash(gogo);
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
+ go_unreachable();
- if (ins.first->second == NULL_TREE)
- ins.first->second = t;
- else
- {
- // We have already created a tree for this type. This can
- // happen when an unnamed type is defined using a named type
- // 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;
- this->tree_ = t;
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
+ default:
+ go_unreachable();
}
- return t;
+ this->btype_is_placeholder_ = false;
}
-// Return a tree for a type without looking in the hash table for
-// identical types. This is used for named types, since there is no
-// point to looking in the hash table for them.
+// Return a pointer to the type descriptor for this type.
tree
-Type::get_tree_without_hash(Gogo* gogo)
+Type::type_descriptor_pointer(Gogo* gogo, Location location)
{
- if (this->tree_ == NULL_TREE)
+ Type* t = this->forwarded();
+ if (t->named_type() != NULL && t->named_type()->is_alias())
+ t = t->named_type()->real_type();
+ if (t->type_descriptor_var_ == NULL)
{
- tree t = this->do_get_tree(gogo);
+ t->make_type_descriptor_var(gogo);
+ go_assert(t->type_descriptor_var_ != NULL);
+ }
+ tree var_tree = var_to_tree(t->type_descriptor_var_);
+ if (var_tree == error_mark_node)
+ return error_mark_node;
+ return build_fold_addr_expr_loc(location.gcc_location(), var_tree);
+}
- // For a recursive function or pointer type, we will temporarily
- // return ptr_type_node during the recursion. We don't want to
- // record that for a forwarding type, as it may confuse us
- // later.
- if (t == ptr_type_node && this->forward_declaration_type() != NULL)
- return t;
+// A mapping from unnamed types to type descriptor variables.
+
+Type::Type_descriptor_vars Type::type_descriptor_vars;
+
+// Build the type descriptor for this type.
+
+void
+Type::make_type_descriptor_var(Gogo* gogo)
+{
+ go_assert(this->type_descriptor_var_ == NULL);
- this->tree_ = t;
- go_preserve_from_gc(t);
+ Named_type* nt = this->named_type();
+
+ // We can have multiple instances of unnamed types, but we only want
+ // to emit the type descriptor once. We use a hash table. This is
+ // not necessary for named types, as they are unique, and we store
+ // the type descriptor in the type itself.
+ Bvariable** phash = NULL;
+ if (nt == NULL)
+ {
+ Bvariable* bvnull = NULL;
+ std::pair<Type_descriptor_vars::iterator, bool> ins =
+ Type::type_descriptor_vars.insert(std::make_pair(this, bvnull));
+ if (!ins.second)
+ {
+ // We've already build a type descriptor for this type.
+ this->type_descriptor_var_ = ins.first->second;
+ return;
+ }
+ phash = &ins.first->second;
}
- return this->tree_;
-}
+ std::string var_name = this->type_descriptor_var_name(gogo, nt);
-// Return a tree representing a zero initialization for this type.
+ // Build the contents of the type descriptor.
+ Expression* initializer = this->do_type_descriptor(gogo, NULL);
-tree
-Type::get_init_tree(Gogo* gogo, bool is_clear)
-{
- tree type_tree = this->get_tree(gogo);
- if (type_tree == error_mark_node)
- return error_mark_node;
- return this->do_get_init_tree(gogo, type_tree, is_clear);
+ Btype* initializer_btype = initializer->type()->get_backend(gogo);
+
+ Location loc = nt == NULL ? Linemap::predeclared_location() : nt->location();
+
+ const Package* dummy;
+ if (this->type_descriptor_defined_elsewhere(nt, &dummy))
+ {
+ this->type_descriptor_var_ =
+ gogo->backend()->immutable_struct_reference(var_name,
+ initializer_btype,
+ loc);
+ if (phash != NULL)
+ *phash = this->type_descriptor_var_;
+ return;
+ }
+
+ // See if this type descriptor can appear in multiple packages.
+ bool is_common = false;
+ if (nt != NULL)
+ {
+ // We create the descriptor for a builtin type whenever we need
+ // it.
+ is_common = nt->is_builtin();
+ }
+ else
+ {
+ // This is an unnamed type. The descriptor could be defined in
+ // any package where it is needed, and the linker will pick one
+ // descriptor to keep.
+ is_common = true;
+ }
+
+ // We are going to build the type descriptor in this package. We
+ // must create the variable before we convert the initializer to the
+ // backend representation, because the initializer may refer to the
+ // type descriptor of this type. By setting type_descriptor_var_ we
+ // ensure that type_descriptor_pointer will work if called while
+ // converting INITIALIZER.
+
+ this->type_descriptor_var_ =
+ gogo->backend()->immutable_struct(var_name, is_common, initializer_btype,
+ loc);
+ if (phash != NULL)
+ *phash = this->type_descriptor_var_;
+
+ Translate_context context(gogo, NULL, NULL, NULL);
+ context.set_is_const();
+ Bexpression* binitializer = tree_to_expr(initializer->get_tree(&context));
+
+ gogo->backend()->immutable_struct_set_init(this->type_descriptor_var_,
+ var_name, is_common,
+ initializer_btype, loc,
+ binitializer);
}
-// Any type which supports the builtin make function must implement
-// this.
+// Return the name of the type descriptor variable. If NT is not
+// NULL, use it to get the name. Otherwise this is an unnamed type.
-tree
-Type::do_make_expression_tree(Translate_context*, Expression_list*,
- source_location)
+std::string
+Type::type_descriptor_var_name(Gogo* gogo, Named_type* nt)
{
- gcc_unreachable();
+ if (nt == NULL)
+ return "__go_td_" + this->mangled_name(gogo);
+
+ Named_object* no = nt->named_object();
+ const Named_object* in_function = nt->in_function();
+ std::string ret = "__go_tdn_";
+ if (nt->is_builtin())
+ go_assert(in_function == NULL);
+ else
+ {
+ const std::string& unique_prefix(no->package() == NULL
+ ? gogo->unique_prefix()
+ : no->package()->unique_prefix());
+ const std::string& package_name(no->package() == NULL
+ ? gogo->package_name()
+ : no->package()->name());
+ ret.append(unique_prefix);
+ ret.append(1, '.');
+ ret.append(package_name);
+ ret.append(1, '.');
+ if (in_function != NULL)
+ {
+ ret.append(Gogo::unpack_hidden_name(in_function->name()));
+ ret.append(1, '.');
+ }
+ }
+ ret.append(no->name());
+ return ret;
}
-// Return a pointer to the type descriptor for this type.
+// Return true if this type descriptor is defined in a different
+// package. If this returns true it sets *PACKAGE to the package.
-tree
-Type::type_descriptor_pointer(Gogo* gogo)
+bool
+Type::type_descriptor_defined_elsewhere(Named_type* nt,
+ const Package** package)
{
- Type* t = this->forwarded();
- if (t->type_descriptor_decl_ == NULL_TREE)
+ if (nt != NULL)
{
- Expression* e = t->do_type_descriptor(gogo, NULL);
- gogo->build_type_descriptor_decl(t, e, &t->type_descriptor_decl_);
- gcc_assert(t->type_descriptor_decl_ != NULL_TREE
- && (t->type_descriptor_decl_ == error_mark_node
- || DECL_P(t->type_descriptor_decl_)));
+ if (nt->named_object()->package() != NULL)
+ {
+ // This is a named type defined in a different package. The
+ // type descriptor should be defined in that package.
+ *package = nt->named_object()->package();
+ return true;
+ }
}
- if (t->type_descriptor_decl_ == error_mark_node)
- return error_mark_node;
- return build_fold_addr_expr(t->type_descriptor_decl_);
+ else
+ {
+ if (this->points_to() != NULL
+ && this->points_to()->named_type() != NULL
+ && this->points_to()->named_type()->named_object()->package() != NULL)
+ {
+ // This is an unnamed pointer to a named type defined in a
+ // different package. The descriptor should be defined in
+ // that package.
+ *package = this->points_to()->named_type()->named_object()->package();
+ return true;
+ }
+ }
+ return false;
}
// Return a composite literal for a type descriptor.
Expression*
Type::named_type_descriptor(Gogo* gogo, Type* type, Named_type* name)
{
- gcc_assert(name != NULL && type->named_type() != name);
+ go_assert(name != NULL && type->named_type() != name);
return type->do_type_descriptor(gogo, name);
}
va_list ap;
va_start(ap, nfields);
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Struct_field_list* sfl = new Struct_field_list();
for (int i = 0; i < nfields; i++)
{
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*
Type::make_builtin_named_type(const char* name, Type* type)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_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();
+ go_assert(r);
+ (*p)->convert(gogo);
+ }
}
// Return the type of a type descriptor. We should really tie this to
static Type* ret;
if (ret == NULL)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* uint8_type = Type::lookup_integer_type("uint8");
Type* uint32_type = Type::lookup_integer_type("uint32");
// The type descriptor type.
Typed_identifier_list* params = new Typed_identifier_list();
- params->push_back(Typed_identifier("", unsafe_pointer_type, bloc));
- params->push_back(Typed_identifier("", uintptr_type, bloc));
+ params->push_back(Typed_identifier("key", unsafe_pointer_type, bloc));
+ params->push_back(Typed_identifier("key_size", uintptr_type, bloc));
Typed_identifier_list* results = new Typed_identifier_list();
results->push_back(Typed_identifier("", uintptr_type, bloc));
Type* hashfn_type = Type::make_function_type(NULL, params, results, bloc);
params = new Typed_identifier_list();
- params->push_back(Typed_identifier("", unsafe_pointer_type, bloc));
- params->push_back(Typed_identifier("", unsafe_pointer_type, bloc));
- params->push_back(Typed_identifier("", uintptr_type, bloc));
+ params->push_back(Typed_identifier("key1", unsafe_pointer_type, bloc));
+ params->push_back(Typed_identifier("key2", unsafe_pointer_type, bloc));
+ params->push_back(Typed_identifier("key_size", uintptr_type, bloc));
results = new Typed_identifier_list();
results->push_back(Typed_identifier("", Type::lookup_bool_type(), bloc));
bloc);
Struct_type* type_descriptor_type =
- Type::make_builtin_struct_type(9,
+ Type::make_builtin_struct_type(10,
"Kind", uint8_type,
"align", uint8_type,
"fieldAlign", uint8_type,
"hashfn", hashfn_type,
"equalfn", equalfn_type,
"string", pointer_string_type,
- "", pointer_uncommon_type);
+ "", pointer_uncommon_type,
+ "ptrToThis",
+ pointer_type_descriptor_type);
Named_type* named = Type::make_builtin_named_type("commonType",
type_descriptor_type);
return ret;
}
-// Return the names of runtime functions which compute a hash code for
-// this type and which compare whether two values of this type are
-// equal.
+// Set *HASH_FN and *EQUAL_FN to the runtime functions which compute a
+// hash code for this type and which compare whether two values of
+// this type are equal. If NAME is not NULL it is the name of this
+// type. HASH_FNTYPE and EQUAL_FNTYPE are the types of these
+// functions, for convenience; they may be NULL.
void
-Type::type_functions(const char** hash_fn, const char** equal_fn) const
+Type::type_functions(Gogo* gogo, Named_type* name, Function_type* hash_fntype,
+ Function_type* equal_fntype, Named_object** hash_fn,
+ Named_object** equal_fn)
{
- switch (this->base()->classification())
+ if (hash_fntype == NULL || equal_fntype == NULL)
{
- case Type::TYPE_ERROR:
- case Type::TYPE_VOID:
- case Type::TYPE_NIL:
- // These types can not be hashed or compared.
- *hash_fn = "__go_type_hash_error";
- *equal_fn = "__go_type_equal_error";
- break;
+ Location bloc = Linemap::predeclared_location();
- case Type::TYPE_BOOLEAN:
- case Type::TYPE_INTEGER:
- case Type::TYPE_FLOAT:
- case Type::TYPE_COMPLEX:
- case Type::TYPE_POINTER:
- case Type::TYPE_FUNCTION:
- case Type::TYPE_MAP:
- case Type::TYPE_CHANNEL:
- *hash_fn = "__go_type_hash_identity";
- *equal_fn = "__go_type_equal_identity";
- break;
+ Type* uintptr_type = Type::lookup_integer_type("uintptr");
+ Type* void_type = Type::make_void_type();
+ Type* unsafe_pointer_type = Type::make_pointer_type(void_type);
- case Type::TYPE_STRING:
- *hash_fn = "__go_type_hash_string";
- *equal_fn = "__go_type_equal_string";
- break;
+ if (hash_fntype == NULL)
+ {
+ Typed_identifier_list* params = new Typed_identifier_list();
+ params->push_back(Typed_identifier("key", unsafe_pointer_type,
+ bloc));
+ params->push_back(Typed_identifier("key_size", uintptr_type, bloc));
- case Type::TYPE_STRUCT:
- case Type::TYPE_ARRAY:
- // These types can not be hashed or compared.
- *hash_fn = "__go_type_hash_error";
- *equal_fn = "__go_type_equal_error";
- break;
+ Typed_identifier_list* results = new Typed_identifier_list();
+ results->push_back(Typed_identifier("", uintptr_type, bloc));
- case Type::TYPE_INTERFACE:
- if (this->interface_type()->is_empty())
+ hash_fntype = Type::make_function_type(NULL, params, results, bloc);
+ }
+ if (equal_fntype == NULL)
{
- *hash_fn = "__go_type_hash_empty_interface";
- *equal_fn = "__go_type_equal_empty_interface";
+ Typed_identifier_list* params = new Typed_identifier_list();
+ params->push_back(Typed_identifier("key1", unsafe_pointer_type,
+ bloc));
+ params->push_back(Typed_identifier("key2", unsafe_pointer_type,
+ bloc));
+ params->push_back(Typed_identifier("key_size", uintptr_type, bloc));
+
+ Typed_identifier_list* results = new Typed_identifier_list();
+ results->push_back(Typed_identifier("", Type::lookup_bool_type(),
+ bloc));
+
+ equal_fntype = Type::make_function_type(NULL, params, results, bloc);
}
- else
+ }
+
+ const char* hash_fnname;
+ const char* equal_fnname;
+ if (this->compare_is_identity(gogo))
+ {
+ hash_fnname = "__go_type_hash_identity";
+ equal_fnname = "__go_type_equal_identity";
+ }
+ else if (!this->is_comparable())
+ {
+ hash_fnname = "__go_type_hash_error";
+ equal_fnname = "__go_type_equal_error";
+ }
+ else
+ {
+ switch (this->base()->classification())
{
- *hash_fn = "__go_type_hash_interface";
- *equal_fn = "__go_type_equal_interface";
+ case Type::TYPE_ERROR:
+ case Type::TYPE_VOID:
+ case Type::TYPE_NIL:
+ case Type::TYPE_FUNCTION:
+ case Type::TYPE_MAP:
+ // For these types is_comparable should have returned false.
+ go_unreachable();
+
+ case Type::TYPE_BOOLEAN:
+ case Type::TYPE_INTEGER:
+ case Type::TYPE_POINTER:
+ case Type::TYPE_CHANNEL:
+ // For these types compare_is_identity should have returned true.
+ go_unreachable();
+
+ case Type::TYPE_FLOAT:
+ hash_fnname = "__go_type_hash_float";
+ equal_fnname = "__go_type_equal_float";
+ break;
+
+ case Type::TYPE_COMPLEX:
+ hash_fnname = "__go_type_hash_complex";
+ equal_fnname = "__go_type_equal_complex";
+ break;
+
+ case Type::TYPE_STRING:
+ hash_fnname = "__go_type_hash_string";
+ equal_fnname = "__go_type_equal_string";
+ break;
+
+ case Type::TYPE_STRUCT:
+ {
+ // This is a struct which can not be compared using a
+ // simple identity function. We need to build a function
+ // for comparison.
+ this->specific_type_functions(gogo, name, hash_fntype,
+ equal_fntype, hash_fn, equal_fn);
+ return;
+ }
+
+ case Type::TYPE_ARRAY:
+ if (this->is_slice_type())
+ {
+ // Type::is_compatible_for_comparison should have
+ // returned false.
+ go_unreachable();
+ }
+ else
+ {
+ // This is an array which can not be compared using a
+ // simple identity function. We need to build a
+ // function for comparison.
+ this->specific_type_functions(gogo, name, hash_fntype,
+ equal_fntype, hash_fn, equal_fn);
+ return;
+ }
+ break;
+
+ case Type::TYPE_INTERFACE:
+ if (this->interface_type()->is_empty())
+ {
+ hash_fnname = "__go_type_hash_empty_interface";
+ equal_fnname = "__go_type_equal_empty_interface";
+ }
+ else
+ {
+ hash_fnname = "__go_type_hash_interface";
+ equal_fnname = "__go_type_equal_interface";
+ }
+ break;
+
+ case Type::TYPE_NAMED:
+ case Type::TYPE_FORWARD:
+ go_unreachable();
+
+ default:
+ go_unreachable();
}
- break;
+ }
+
+
+ Location bloc = Linemap::predeclared_location();
+ *hash_fn = Named_object::make_function_declaration(hash_fnname, NULL,
+ hash_fntype, bloc);
+ (*hash_fn)->func_declaration_value()->set_asm_name(hash_fnname);
+ *equal_fn = Named_object::make_function_declaration(equal_fnname, NULL,
+ equal_fntype, bloc);
+ (*equal_fn)->func_declaration_value()->set_asm_name(equal_fnname);
+}
+
+// A hash table mapping types to the specific hash functions.
+
+Type::Type_functions Type::type_functions_table;
+
+// Handle a type function which is specific to a type: a struct or
+// array which can not use an identity comparison.
+
+void
+Type::specific_type_functions(Gogo* gogo, Named_type* name,
+ Function_type* hash_fntype,
+ Function_type* equal_fntype,
+ Named_object** hash_fn,
+ Named_object** equal_fn)
+{
+ Hash_equal_fn fnull(NULL, NULL);
+ std::pair<Type*, Hash_equal_fn> val(name != NULL ? name : this, fnull);
+ std::pair<Type_functions::iterator, bool> ins =
+ Type::type_functions_table.insert(val);
+ if (!ins.second)
+ {
+ // We already have functions for this type
+ *hash_fn = ins.first->second.first;
+ *equal_fn = ins.first->second.second;
+ return;
+ }
+
+ std::string base_name;
+ if (name == NULL)
+ {
+ // Mangled names can have '.' if they happen to refer to named
+ // types in some way. That's fine if this is simply a named
+ // type, but otherwise it will confuse the code that builds
+ // function identifiers. Remove '.' when necessary.
+ base_name = this->mangled_name(gogo);
+ size_t i;
+ while ((i = base_name.find('.')) != std::string::npos)
+ base_name[i] = '$';
+ base_name = gogo->pack_hidden_name(base_name, false);
+ }
+ else
+ {
+ // This name is already hidden or not as appropriate.
+ base_name = name->name();
+ const Named_object* in_function = name->in_function();
+ if (in_function != NULL)
+ base_name += '$' + in_function->name();
+ }
+ std::string hash_name = base_name + "$hash";
+ std::string equal_name = base_name + "$equal";
+
+ Location bloc = Linemap::predeclared_location();
+
+ const Package* package = NULL;
+ bool is_defined_elsewhere =
+ this->type_descriptor_defined_elsewhere(name, &package);
+ if (is_defined_elsewhere)
+ {
+ *hash_fn = Named_object::make_function_declaration(hash_name, package,
+ hash_fntype, bloc);
+ *equal_fn = Named_object::make_function_declaration(equal_name, package,
+ equal_fntype, bloc);
+ }
+ else
+ {
+ *hash_fn = gogo->declare_package_function(hash_name, hash_fntype, bloc);
+ *equal_fn = gogo->declare_package_function(equal_name, equal_fntype,
+ bloc);
+ }
+
+ ins.first->second.first = *hash_fn;
+ ins.first->second.second = *equal_fn;
+
+ if (!is_defined_elsewhere)
+ {
+ if (gogo->in_global_scope())
+ this->write_specific_type_functions(gogo, name, hash_name, hash_fntype,
+ equal_name, equal_fntype);
+ else
+ gogo->queue_specific_type_function(this, name, hash_name, hash_fntype,
+ equal_name, equal_fntype);
+ }
+}
+
+// Write the hash and equality functions for a type which needs to be
+// written specially.
- case Type::TYPE_NAMED:
- case Type::TYPE_FORWARD:
- gcc_unreachable();
+void
+Type::write_specific_type_functions(Gogo* gogo, Named_type* name,
+ const std::string& hash_name,
+ Function_type* hash_fntype,
+ const std::string& equal_name,
+ Function_type* equal_fntype)
+{
+ Location bloc = Linemap::predeclared_location();
+
+ Named_object* hash_fn = gogo->start_function(hash_name, hash_fntype, false,
+ bloc);
+ gogo->start_block(bloc);
+
+ if (this->struct_type() != NULL)
+ this->struct_type()->write_hash_function(gogo, name, hash_fntype,
+ equal_fntype);
+ else if (this->array_type() != NULL)
+ this->array_type()->write_hash_function(gogo, name, hash_fntype,
+ equal_fntype);
+ else
+ go_unreachable();
+
+ Block* b = gogo->finish_block(bloc);
+ gogo->add_block(b, bloc);
+ gogo->lower_block(hash_fn, b);
+ gogo->finish_function(bloc);
+
+ Named_object *equal_fn = gogo->start_function(equal_name, equal_fntype,
+ false, bloc);
+ gogo->start_block(bloc);
+
+ if (this->struct_type() != NULL)
+ this->struct_type()->write_equal_function(gogo, name);
+ else if (this->array_type() != NULL)
+ this->array_type()->write_equal_function(gogo, name);
+ else
+ go_unreachable();
- default:
- gcc_unreachable();
- }
+ b = gogo->finish_block(bloc);
+ gogo->add_block(b, bloc);
+ gogo->lower_block(equal_fn, b);
+ gogo->finish_function(bloc);
}
// Return a composite literal for the type descriptor for a plain type
Named_type* name, const Methods* methods,
bool only_value_methods)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* td_type = Type::make_type_descriptor_type();
const Struct_field_list* fields = td_type->struct_type()->fields();
Expression_list* vals = new Expression_list();
vals->reserve(9);
+ if (!this->has_pointer())
+ runtime_type_kind |= RUNTIME_TYPE_KIND_NO_POINTERS;
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "Kind");
+ go_assert(p->is_field_name("Kind"));
mpz_t iv;
mpz_init_set_ui(iv, runtime_type_kind);
vals->push_back(Expression::make_integer(&iv, p->type(), bloc));
++p;
- gcc_assert(p->field_name() == "align");
+ go_assert(p->is_field_name("align"));
Expression::Type_info type_info = Expression::TYPE_INFO_ALIGNMENT;
vals->push_back(Expression::make_type_info(this, type_info));
++p;
- gcc_assert(p->field_name() == "fieldAlign");
+ go_assert(p->is_field_name("fieldAlign"));
type_info = Expression::TYPE_INFO_FIELD_ALIGNMENT;
vals->push_back(Expression::make_type_info(this, type_info));
++p;
- gcc_assert(p->field_name() == "size");
+ go_assert(p->is_field_name("size"));
type_info = Expression::TYPE_INFO_SIZE;
vals->push_back(Expression::make_type_info(this, type_info));
++p;
- gcc_assert(p->field_name() == "hash");
- mpz_set_ui(iv, this->hash_for_method(gogo));
+ go_assert(p->is_field_name("hash"));
+ unsigned int h;
+ if (name != NULL)
+ h = name->hash_for_method(gogo);
+ else
+ h = this->hash_for_method(gogo);
+ mpz_set_ui(iv, h);
vals->push_back(Expression::make_integer(&iv, p->type(), bloc));
- const char* hash_fn;
- const char* equal_fn;
- this->type_functions(&hash_fn, &equal_fn);
-
++p;
- gcc_assert(p->field_name() == "hashfn");
- Function_type* fntype = p->type()->function_type();
- Named_object* no = Named_object::make_function_declaration(hash_fn, NULL,
- fntype,
- bloc);
- no->func_declaration_value()->set_asm_name(hash_fn);
- vals->push_back(Expression::make_func_reference(no, NULL, bloc));
+ go_assert(p->is_field_name("hashfn"));
+ Function_type* hash_fntype = p->type()->function_type();
++p;
- gcc_assert(p->field_name() == "equalfn");
- fntype = p->type()->function_type();
- no = Named_object::make_function_declaration(equal_fn, NULL, fntype, bloc);
- no->func_declaration_value()->set_asm_name(equal_fn);
- vals->push_back(Expression::make_func_reference(no, NULL, bloc));
+ go_assert(p->is_field_name("equalfn"));
+ Function_type* equal_fntype = p->type()->function_type();
+
+ Named_object* hash_fn;
+ Named_object* equal_fn;
+ this->type_functions(gogo, name, hash_fntype, equal_fntype, &hash_fn,
+ &equal_fn);
+ vals->push_back(Expression::make_func_reference(hash_fn, NULL, bloc));
+ vals->push_back(Expression::make_func_reference(equal_fn, NULL, bloc));
++p;
- gcc_assert(p->field_name() == "string");
+ go_assert(p->is_field_name("string"));
Expression* s = Expression::make_string((name != NULL
? name->reflection(gogo)
: this->reflection(gogo)),
vals->push_back(Expression::make_unary(OPERATOR_AND, s, bloc));
++p;
- gcc_assert(p->field_name() == "uncommonType");
+ go_assert(p->is_field_name("uncommonType"));
if (name == NULL && methods == NULL)
vals->push_back(Expression::make_nil(bloc));
else
}
++p;
- gcc_assert(p == fields->end());
+ go_assert(p->is_field_name("ptrToThis"));
+ if (name == NULL)
+ vals->push_back(Expression::make_nil(bloc));
+ else
+ {
+ Type* pt = Type::make_pointer_type(name);
+ vals->push_back(Expression::make_type_descriptor(pt, bloc));
+ }
+
+ ++p;
+ go_assert(p == fields->end());
mpz_clear(iv);
Named_type* name, const Methods* methods,
bool only_value_methods) const
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
const Struct_field_list* fields = uncommon_type->struct_type()->fields();
vals->reserve(3);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "name");
+ go_assert(p->is_field_name("name"));
++p;
- gcc_assert(p->field_name() == "pkgPath");
+ go_assert(p->is_field_name("pkgPath"));
if (name == NULL)
{
}
++p;
- gcc_assert(p->field_name() == "methods");
+ go_assert(p->is_field_name("methods"));
vals->push_back(this->methods_constructor(gogo, p->type(), methods,
only_value_methods));
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
Expression* r = Expression::make_struct_composite_literal(uncommon_type,
vals, bloc);
const Methods* methods,
bool only_value_methods) const
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
std::vector<std::pair<std::string, const Method*> > smethods;
if (methods != NULL)
p != smethods.end();
++p)
vals->push_back(this->method_constructor(gogo, method_type, p->first,
- p->second));
+ p->second, only_value_methods));
return Expression::make_slice_composite_literal(methods_type, vals, bloc);
}
Expression*
Type::method_constructor(Gogo*, Type* method_type,
const std::string& method_name,
- const Method* m) const
+ const Method* m,
+ bool only_value_methods) const
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
const Struct_field_list* fields = method_type->struct_type()->fields();
vals->reserve(5);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "name");
+ go_assert(p->is_field_name("name"));
const std::string n = Gogo::unpack_hidden_name(method_name);
Expression* s = Expression::make_string(n, bloc);
vals->push_back(Expression::make_unary(OPERATOR_AND, s, bloc));
++p;
- gcc_assert(p->field_name() == "pkgPath");
+ go_assert(p->is_field_name("pkgPath"));
if (!Gogo::is_hidden_name(method_name))
vals->push_back(Expression::make_nil(bloc));
else
mtype = no->func_value()->type();
else
mtype = no->func_declaration_value()->type();
- gcc_assert(mtype->is_method());
+ go_assert(mtype->is_method());
Type* nonmethod_type = mtype->copy_without_receiver();
++p;
- gcc_assert(p->field_name() == "mtyp");
+ go_assert(p->is_field_name("mtyp"));
vals->push_back(Expression::make_type_descriptor(nonmethod_type, bloc));
++p;
- gcc_assert(p->field_name() == "typ");
+ go_assert(p->is_field_name("typ"));
+ if (!only_value_methods && m->is_value_method())
+ {
+ // This is a value method on a pointer type. Change the type of
+ // the method to use a pointer receiver. The implementation
+ // always uses a pointer receiver anyhow.
+ Type* rtype = mtype->receiver()->type();
+ Type* prtype = Type::make_pointer_type(rtype);
+ Typed_identifier* receiver =
+ new Typed_identifier(mtype->receiver()->name(), prtype,
+ mtype->receiver()->location());
+ mtype = Type::make_function_type(receiver,
+ (mtype->parameters() == NULL
+ ? NULL
+ : mtype->parameters()->copy()),
+ (mtype->results() == NULL
+ ? NULL
+ : mtype->results()->copy()),
+ mtype->location());
+ }
vals->push_back(Expression::make_type_descriptor(mtype, bloc));
++p;
- gcc_assert(p->field_name() == "tfn");
+ go_assert(p->is_field_name("tfn"));
vals->push_back(Expression::make_func_reference(no, NULL, bloc));
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
return Expression::make_struct_composite_literal(method_type, vals, bloc);
}
return ret;
}
+// Return whether the backend size of the type is known.
+
+bool
+Type::is_backend_type_size_known(Gogo* gogo)
+{
+ switch (this->classification_)
+ {
+ case TYPE_ERROR:
+ case TYPE_VOID:
+ case TYPE_BOOLEAN:
+ case TYPE_INTEGER:
+ case TYPE_FLOAT:
+ case TYPE_COMPLEX:
+ case TYPE_STRING:
+ case TYPE_FUNCTION:
+ case TYPE_POINTER:
+ case TYPE_NIL:
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ case TYPE_INTERFACE:
+ return true;
+
+ case TYPE_STRUCT:
+ {
+ const Struct_field_list* fields = this->struct_type()->fields();
+ for (Struct_field_list::const_iterator pf = fields->begin();
+ pf != fields->end();
+ ++pf)
+ if (!pf->type()->is_backend_type_size_known(gogo))
+ return false;
+ return true;
+ }
+
+ case TYPE_ARRAY:
+ {
+ const Array_type* at = this->array_type();
+ if (at->length() == NULL)
+ return true;
+ else
+ {
+ mpz_t ival;
+ mpz_init(ival);
+ Type* dummy;
+ bool length_known = at->length()->integer_constant_value(true,
+ ival,
+ &dummy);
+ mpz_clear(ival);
+ if (!length_known)
+ return false;
+ return at->element_type()->is_backend_type_size_known(gogo);
+ }
+ }
+
+ case TYPE_NAMED:
+ // Begin converting this type to the backend representation.
+ // This will create a placeholder if necessary.
+ this->get_backend(gogo);
+ return this->named_type()->is_named_backend_type_size_known();
+
+ case TYPE_FORWARD:
+ {
+ Forward_declaration_type* fdt = this->forward_declaration_type();
+ return fdt->real_type()->is_backend_type_size_known(gogo);
+ }
+
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
+ go_unreachable();
+
+ default:
+ go_unreachable();
+ }
+}
+
+// If the size of the type can be determined, set *PSIZE to the size
+// in bytes and return true. Otherwise, return false. This queries
+// the backend.
+
+bool
+Type::backend_type_size(Gogo* gogo, unsigned int *psize)
+{
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ Btype* bt = this->get_backend_placeholder(gogo);
+ size_t size = gogo->backend()->type_size(bt);
+ *psize = static_cast<unsigned int>(size);
+ if (*psize != size)
+ return false;
+ return true;
+}
+
+// If the alignment of the type can be determined, set *PALIGN to
+// the alignment in bytes and return true. Otherwise, return false.
+
+bool
+Type::backend_type_align(Gogo* gogo, unsigned int *palign)
+{
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ Btype* bt = this->get_backend_placeholder(gogo);
+ size_t align = gogo->backend()->type_alignment(bt);
+ *palign = static_cast<unsigned int>(align);
+ if (*palign != align)
+ return false;
+ return true;
+}
+
+// Like backend_type_align, but return the alignment when used as a
+// field.
+
+bool
+Type::backend_type_field_align(Gogo* gogo, unsigned int *palign)
+{
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ Btype* bt = this->get_backend_placeholder(gogo);
+ size_t a = gogo->backend()->type_field_alignment(bt);
+ *palign = static_cast<unsigned int>(a);
+ if (*palign != a)
+ return false;
+ return true;
+}
+
// Default function to export a type.
void
Type::do_export(Export*) const
{
- gcc_unreachable();
+ go_unreachable();
}
// Import a type.
{ }
protected:
- tree
- do_get_tree(Gogo*)
- { return error_mark_node; }
+ bool
+ do_compare_is_identity(Gogo*) const
+ { return false; }
- tree
- do_get_init_tree(Gogo*, tree, bool)
- { return error_mark_node; }
+ Btype*
+ do_get_backend(Gogo* gogo)
+ { return gogo->backend()->error_type(); }
Expression*
do_type_descriptor(Gogo*, Named_type*)
- { return Expression::make_error(BUILTINS_LOCATION); }
+ { return Expression::make_error(Linemap::predeclared_location()); }
void
do_reflection(Gogo*, std::string*) const
- { gcc_assert(saw_errors()); }
+ { go_assert(saw_errors()); }
void
do_mangled_name(Gogo*, std::string* ret) const
{ }
protected:
- tree
- do_get_tree(Gogo*)
- { return void_type_node; }
+ bool
+ do_compare_is_identity(Gogo*) const
+ { return false; }
- tree
- do_get_init_tree(Gogo*, tree, bool)
- { gcc_unreachable(); }
+ Btype*
+ do_get_backend(Gogo* gogo)
+ { return gogo->backend()->void_type(); }
Expression*
do_type_descriptor(Gogo*, Named_type*)
- { gcc_unreachable(); }
+ { go_unreachable(); }
void
do_reflection(Gogo*, std::string*) const
{ }
protected:
- tree
- do_get_tree(Gogo*)
- { return boolean_type_node; }
+ bool
+ do_compare_is_identity(Gogo*) const
+ { return true; }
- tree
- do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
- { return is_clear ? NULL : fold_convert(type_tree, boolean_false_node); }
+ Btype*
+ do_get_backend(Gogo* gogo)
+ { return gogo->backend()->bool_type(); }
Expression*
do_type_descriptor(Gogo*, Named_type* name);
else
{
Named_object* no = gogo->lookup_global("bool");
- gcc_assert(no != NULL);
+ go_assert(no != NULL);
return Type::type_descriptor(gogo, no->type_value());
}
}
Type::make_named_bool_type()
{
Type* bool_type = Type::make_boolean_type();
- Named_object* named_object = Named_object::make_type("bool", NULL,
- bool_type,
- BUILTINS_LOCATION);
+ Named_object* named_object =
+ Named_object::make_type("bool", NULL, bool_type,
+ Linemap::predeclared_location());
Named_type* named_type = named_object->type_value();
named_bool_type = named_type;
return named_type;
Integer_type* integer_type = new Integer_type(false, is_unsigned, bits,
runtime_type_kind);
std::string sname(name);
- Named_object* named_object = Named_object::make_type(sname, NULL,
- integer_type,
- BUILTINS_LOCATION);
+ Named_object* named_object =
+ Named_object::make_type(sname, NULL, integer_type,
+ Linemap::predeclared_location());
Named_type* named_type = named_object->type_value();
std::pair<Named_integer_types::iterator, bool> ins =
Integer_type::named_integer_types.insert(std::make_pair(sname, named_type));
- gcc_assert(ins.second);
+ go_assert(ins.second);
return named_type;
}
{
Named_integer_types::const_iterator p =
Integer_type::named_integer_types.find(name);
- gcc_assert(p != Integer_type::named_integer_types.end());
+ go_assert(p != Integer_type::named_integer_types.end());
return p->second;
}
return abstract_type;
}
+// Create a new abstract character type.
+
+Integer_type*
+Integer_type::create_abstract_character_type()
+{
+ static Integer_type* abstract_type;
+ if (abstract_type == NULL)
+ {
+ abstract_type = new Integer_type(true, false, 32,
+ RUNTIME_TYPE_KIND_INT32);
+ abstract_type->set_is_rune();
+ }
+ return abstract_type;
+}
+
// Integer type compatibility.
bool
+ ((this->is_abstract_ ? 1 : 0) << 9));
}
-// Get the tree for an Integer_type.
+// Convert an Integer_type to the backend representation.
-tree
-Integer_type::do_get_tree(Gogo*)
-{
- gcc_assert(!this->is_abstract_);
- if (this->is_unsigned_)
- {
- if (this->bits_ == INT_TYPE_SIZE)
- return unsigned_type_node;
- else if (this->bits_ == CHAR_TYPE_SIZE)
- return unsigned_char_type_node;
- else if (this->bits_ == SHORT_TYPE_SIZE)
- return short_unsigned_type_node;
- else if (this->bits_ == LONG_TYPE_SIZE)
- return long_unsigned_type_node;
- else if (this->bits_ == LONG_LONG_TYPE_SIZE)
- return long_long_unsigned_type_node;
- else
- return make_unsigned_type(this->bits_);
- }
- else
+Btype*
+Integer_type::do_get_backend(Gogo* gogo)
+{
+ if (this->is_abstract_)
{
- if (this->bits_ == INT_TYPE_SIZE)
- return integer_type_node;
- else if (this->bits_ == CHAR_TYPE_SIZE)
- return signed_char_type_node;
- else if (this->bits_ == SHORT_TYPE_SIZE)
- return short_integer_type_node;
- else if (this->bits_ == LONG_TYPE_SIZE)
- return long_integer_type_node;
- else if (this->bits_ == LONG_LONG_TYPE_SIZE)
- return long_long_integer_type_node;
- else
- return make_signed_type(this->bits_);
+ go_assert(saw_errors());
+ return gogo->backend()->error_type();
}
-}
-
-tree
-Integer_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- return is_clear ? NULL : build_int_cst(type_tree, 0);
+ return gogo->backend()->integer_type(this->is_unsigned_, this->bits_);
}
// The type descriptor for an integer type. Integer types are always
Expression*
Integer_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- gcc_assert(name != NULL);
+ go_assert(name != NULL || saw_errors());
return this->plain_type_descriptor(gogo, this->runtime_type_kind_, name);
}
void
Integer_type::do_reflection(Gogo*, std::string*) const
{
- gcc_unreachable();
+ go_assert(saw_errors());
}
// Mangled name.
return Integer_type::create_abstract_integer_type();
}
+// Make an abstract character type.
+
+Integer_type*
+Type::make_abstract_character_type()
+{
+ return Integer_type::create_abstract_character_type();
+}
+
// Look up an integer type.
Named_type*
{
Float_type* float_type = new Float_type(false, bits, runtime_type_kind);
std::string sname(name);
- Named_object* named_object = Named_object::make_type(sname, NULL, float_type,
- BUILTINS_LOCATION);
+ Named_object* named_object =
+ Named_object::make_type(sname, NULL, float_type,
+ Linemap::predeclared_location());
Named_type* named_type = named_object->type_value();
std::pair<Named_float_types::iterator, bool> ins =
Float_type::named_float_types.insert(std::make_pair(sname, named_type));
- gcc_assert(ins.second);
+ go_assert(ins.second);
return named_type;
}
{
Named_float_types::const_iterator p =
Float_type::named_float_types.find(name);
- gcc_assert(p != Float_type::named_float_types.end());
+ go_assert(p != Float_type::named_float_types.end());
return p->second;
}
return (this->bits_ << 4) + ((this->is_abstract_ ? 1 : 0) << 8);
}
-// Get a tree without using a Gogo*.
-
-tree
-Float_type::type_tree() const
-{
- if (this->bits_ == FLOAT_TYPE_SIZE)
- return float_type_node;
- else if (this->bits_ == DOUBLE_TYPE_SIZE)
- return double_type_node;
- else if (this->bits_ == LONG_DOUBLE_TYPE_SIZE)
- return long_double_type_node;
- else
- {
- tree ret = make_node(REAL_TYPE);
- TYPE_PRECISION(ret) = this->bits_;
- layout_type(ret);
- return ret;
- }
-}
-
-// Get a tree.
-
-tree
-Float_type::do_get_tree(Gogo*)
-{
- return this->type_tree();
-}
+// Convert to the backend representation.
-tree
-Float_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
+Btype*
+Float_type::do_get_backend(Gogo* gogo)
{
- if (is_clear)
- return NULL;
- REAL_VALUE_TYPE r;
- real_from_integer(&r, TYPE_MODE(type_tree), 0, 0, 0);
- return build_real(type_tree, r);
+ return gogo->backend()->float_type(this->bits_);
}
// The type descriptor for a float type. Float types are always named.
Expression*
Float_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- gcc_assert(name != NULL);
+ go_assert(name != NULL || saw_errors());
return this->plain_type_descriptor(gogo, this->runtime_type_kind_, name);
}
void
Float_type::do_reflection(Gogo*, std::string*) const
{
- gcc_unreachable();
+ go_assert(saw_errors());
}
// Mangled name.
Complex_type* complex_type = new Complex_type(false, bits,
runtime_type_kind);
std::string sname(name);
- Named_object* named_object = Named_object::make_type(sname, NULL,
- complex_type,
- BUILTINS_LOCATION);
+ Named_object* named_object =
+ Named_object::make_type(sname, NULL, complex_type,
+ Linemap::predeclared_location());
Named_type* named_type = named_object->type_value();
std::pair<Named_complex_types::iterator, bool> ins =
Complex_type::named_complex_types.insert(std::make_pair(sname,
named_type));
- gcc_assert(ins.second);
+ go_assert(ins.second);
return named_type;
}
{
Named_complex_types::const_iterator p =
Complex_type::named_complex_types.find(name);
- gcc_assert(p != Complex_type::named_complex_types.end());
+ go_assert(p != Complex_type::named_complex_types.end());
return p->second;
}
return (this->bits_ << 4) + ((this->is_abstract_ ? 1 : 0) << 8);
}
-// Get a tree without using a Gogo*.
-
-tree
-Complex_type::type_tree() const
-{
- if (this->bits_ == FLOAT_TYPE_SIZE * 2)
- return complex_float_type_node;
- else if (this->bits_ == DOUBLE_TYPE_SIZE * 2)
- return complex_double_type_node;
- else if (this->bits_ == LONG_DOUBLE_TYPE_SIZE * 2)
- return complex_long_double_type_node;
- else
- {
- tree ret = make_node(REAL_TYPE);
- TYPE_PRECISION(ret) = this->bits_ / 2;
- layout_type(ret);
- return build_complex_type(ret);
- }
-}
-
-// Get a tree.
-
-tree
-Complex_type::do_get_tree(Gogo*)
-{
- return this->type_tree();
-}
-
-// Zero initializer.
+// Convert to the backend representation.
-tree
-Complex_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
+Btype*
+Complex_type::do_get_backend(Gogo* gogo)
{
- if (is_clear)
- return NULL;
- REAL_VALUE_TYPE r;
- real_from_integer(&r, TYPE_MODE(TREE_TYPE(type_tree)), 0, 0, 0);
- return build_complex(type_tree, build_real(TREE_TYPE(type_tree), r),
- build_real(TREE_TYPE(type_tree), r));
+ return gogo->backend()->complex_type(this->bits_);
}
// The type descriptor for a complex type. Complex types are always
Expression*
Complex_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- gcc_assert(name != NULL);
+ go_assert(name != NULL || saw_errors());
return this->plain_type_descriptor(gogo, this->runtime_type_kind_, name);
}
void
Complex_type::do_reflection(Gogo*, std::string*) const
{
- gcc_unreachable();
+ go_assert(saw_errors());
}
// Mangled name.
// Class String_type.
-// Return the tree for String_type. A string is a struct with two
-// fields: a pointer to the characters and a length.
+// Convert String_type to the backend representation. A string is a
+// struct with two fields: a pointer to the characters and a length.
-tree
-String_type::do_get_tree(Gogo*)
+Btype*
+String_type::do_get_backend(Gogo* gogo)
{
- static tree struct_type;
- return Gogo::builtin_struct(&struct_type, "__go_string", NULL_TREE, 2,
- "__data",
- build_pointer_type(unsigned_char_type_node),
- "__length",
- integer_type_node);
+ static Btype* backend_string_type;
+ if (backend_string_type == NULL)
+ {
+ std::vector<Backend::Btyped_identifier> fields(2);
+
+ Type* b = gogo->lookup_global("byte")->type_value();
+ Type* pb = Type::make_pointer_type(b);
+
+ // We aren't going to get back to this field to finish the
+ // backend representation, so force it to be finished now.
+ if (!gogo->named_types_are_converted())
+ {
+ pb->get_backend_placeholder(gogo);
+ pb->finish_backend(gogo);
+ }
+
+ fields[0].name = "__data";
+ fields[0].btype = pb->get_backend(gogo);
+ fields[0].location = Linemap::predeclared_location();
+
+ Type* int_type = Type::lookup_integer_type("int");
+ fields[1].name = "__length";
+ fields[1].btype = int_type->get_backend(gogo);
+ fields[1].location = fields[0].location;
+
+ backend_string_type = gogo->backend()->struct_type(fields);
+ }
+ return backend_string_type;
}
// Return a tree for the length of STRING.
String_type::length_tree(Gogo*, tree string)
{
tree string_type = TREE_TYPE(string);
- gcc_assert(TREE_CODE(string_type) == RECORD_TYPE);
+ go_assert(TREE_CODE(string_type) == RECORD_TYPE);
tree length_field = DECL_CHAIN(TYPE_FIELDS(string_type));
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(length_field)),
+ go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(length_field)),
"__length") == 0);
return fold_build3(COMPONENT_REF, integer_type_node, string,
length_field, NULL_TREE);
String_type::bytes_tree(Gogo*, tree string)
{
tree string_type = TREE_TYPE(string);
- gcc_assert(TREE_CODE(string_type) == RECORD_TYPE);
+ go_assert(TREE_CODE(string_type) == RECORD_TYPE);
tree bytes_field = TYPE_FIELDS(string_type);
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(bytes_field)),
+ go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(bytes_field)),
"__data") == 0);
return fold_build3(COMPONENT_REF, TREE_TYPE(bytes_field), string,
bytes_field, NULL_TREE);
}
-// We initialize a string to { NULL, 0 }.
-
-tree
-String_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- if (is_clear)
- return NULL_TREE;
-
- gcc_assert(TREE_CODE(type_tree) == RECORD_TYPE);
-
- VEC(constructor_elt, gc)* init = VEC_alloc(constructor_elt, gc, 2);
-
- for (tree field = TYPE_FIELDS(type_tree);
- field != NULL_TREE;
- field = DECL_CHAIN(field))
- {
- constructor_elt* elt = VEC_quick_push(constructor_elt, init, NULL);
- elt->index = field;
- elt->value = fold_convert(TREE_TYPE(field), size_zero_node);
- }
-
- tree ret = build_constructor(type_tree, init);
- TREE_CONSTANT(ret) = 1;
- return ret;
-}
-
// The type descriptor for the string type.
Expression*
else
{
Named_object* no = gogo->lookup_global("string");
- gcc_assert(no != NULL);
+ go_assert(no != NULL);
return Type::type_descriptor(gogo, no->type_value());
}
}
Type::make_named_string_type()
{
Type* string_type = Type::make_string_type();
- Named_object* named_object = Named_object::make_type("string", NULL,
- string_type,
- BUILTINS_LOCATION);
+ Named_object* named_object =
+ Named_object::make_type("string", NULL, string_type,
+ Linemap::predeclared_location());
Named_type* named_type = named_object->type_value();
named_string_type = named_type;
return named_type;
{ }
protected:
- tree
- do_get_tree(Gogo*)
- { gcc_unreachable(); }
+ bool
+ do_compare_is_identity(Gogo*) const
+ { return false; }
- tree
- do_get_init_tree(Gogo*, tree, bool)
- { gcc_unreachable(); }
+ Btype*
+ do_get_backend(Gogo*)
+ { go_unreachable(); }
Expression*
do_type_descriptor(Gogo*, Named_type*)
- { gcc_unreachable(); }
+ { go_unreachable(); }
void
do_reflection(Gogo*, std::string*) const
- { gcc_unreachable(); }
+ { go_unreachable(); }
void
do_mangled_name(Gogo*, std::string*) const
- { gcc_unreachable(); }
+ { go_unreachable(); }
};
// Make the sink type.
// A redeclaration of a function is required to use the same names
// for the receiver and parameters.
if (this->receiver() != NULL
- && this->receiver()->name() != t->receiver()->name()
- && this->receiver()->name() != Import::import_marker
- && t->receiver()->name() != Import::import_marker)
+ && this->receiver()->name() != t->receiver()->name())
{
if (reason != NULL)
*reason = "receiver name changed";
p2 != parms2->end();
++p2, ++p1)
{
- if (p1->name() != p2->name()
- && p1->name() != Import::import_marker
- && p2->name() != Import::import_marker)
+ if (p1->name() != p2->name())
{
if (reason != NULL)
*reason = "parameter name changed";
res2 != results2->end();
++res2, ++res1)
{
- if (res1->name() != res2->name()
- && res1->name() != Import::import_marker
- && res2->name() != Import::import_marker)
+ if (res1->name() != res2->name())
{
if (reason != NULL)
*reason = "result name changed";
return ret;
}
-// Get the tree for a function type.
+// Get the backend representation for a function type.
-tree
-Function_type::do_get_tree(Gogo* gogo)
+Btype*
+Function_type::do_get_backend(Gogo* gogo)
{
- tree args = NULL_TREE;
- tree* pp = &args;
-
+ Backend::Btyped_identifier breceiver;
if (this->receiver_ != NULL)
{
- Type* rtype = this->receiver_->type();
- tree ptype = rtype->get_tree(gogo);
- if (ptype == error_mark_node)
- return error_mark_node;
+ breceiver.name = Gogo::unpack_hidden_name(this->receiver_->name());
// We always pass the address of the receiver parameter, in
// order to make interface calls work with unknown types.
+ Type* rtype = this->receiver_->type();
if (rtype->points_to() == NULL)
- ptype = build_pointer_type(ptype);
-
- *pp = tree_cons (NULL_TREE, ptype, NULL_TREE);
- pp = &TREE_CHAIN (*pp);
+ rtype = Type::make_pointer_type(rtype);
+ breceiver.btype = rtype->get_backend(gogo);
+ breceiver.location = this->receiver_->location();
}
+ std::vector<Backend::Btyped_identifier> bparameters;
if (this->parameters_ != NULL)
{
+ bparameters.resize(this->parameters_->size());
+ size_t i = 0;
for (Typed_identifier_list::const_iterator p = this->parameters_->begin();
p != this->parameters_->end();
- ++p)
+ ++p, ++i)
{
- tree ptype = p->type()->get_tree(gogo);
- if (ptype == error_mark_node)
- return error_mark_node;
- *pp = tree_cons (NULL_TREE, ptype, NULL_TREE);
- pp = &TREE_CHAIN (*pp);
+ bparameters[i].name = Gogo::unpack_hidden_name(p->name());
+ bparameters[i].btype = p->type()->get_backend(gogo);
+ bparameters[i].location = p->location();
}
+ go_assert(i == bparameters.size());
}
- // Varargs is handled entirely at the Go level. At the tree level,
- // functions are not varargs.
- *pp = void_list_node;
-
- tree result;
- if (this->results_ == NULL)
- result = void_type_node;
- else if (this->results_->size() == 1)
- result = this->results_->begin()->type()->get_tree(gogo);
- else
+ std::vector<Backend::Btyped_identifier> bresults;
+ if (this->results_ != NULL)
{
- result = make_node(RECORD_TYPE);
- tree field_trees = NULL_TREE;
- tree* pp = &field_trees;
+ bresults.resize(this->results_->size());
+ size_t i = 0;
for (Typed_identifier_list::const_iterator p = this->results_->begin();
p != this->results_->end();
- ++p)
+ ++p, ++i)
{
- const std::string name = (p->name().empty()
- ? "UNNAMED"
- : Gogo::unpack_hidden_name(p->name()));
- tree name_tree = get_identifier_with_length(name.data(),
- name.length());
- tree field_type_tree = p->type()->get_tree(gogo);
- if (field_type_tree == error_mark_node)
- return error_mark_node;
- tree field = build_decl(this->location_, FIELD_DECL, name_tree,
- field_type_tree);
- DECL_CONTEXT(field) = result;
- *pp = field;
- pp = &DECL_CHAIN(field);
- }
- TYPE_FIELDS(result) = field_trees;
- layout_type(result);
- }
-
- if (result == error_mark_node)
- return error_mark_node;
-
- tree fntype = build_function_type(result, args);
- if (fntype == error_mark_node)
- return fntype;
-
- return build_pointer_type(fntype);
-}
-
-// Functions are initialized to NULL.
+ bresults[i].name = Gogo::unpack_hidden_name(p->name());
+ bresults[i].btype = p->type()->get_backend(gogo);
+ bresults[i].location = p->location();
+ }
+ go_assert(i == bresults.size());
+ }
-tree
-Function_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- if (is_clear)
- return NULL;
- return fold_convert(type_tree, null_pointer_node);
+ return gogo->backend()->function_type(breceiver, bparameters, bresults,
+ this->location());
}
// The type of a function type descriptor.
Expression*
Function_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* ftdt = Function_type::make_function_type_descriptor_type();
vals->reserve(4);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "commonType");
+ go_assert(p->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_FUNC,
name, NULL, true));
++p;
- gcc_assert(p->field_name() == "dotdotdot");
+ go_assert(p->is_field_name("dotdotdot"));
vals->push_back(Expression::make_boolean(this->is_varargs(), bloc));
++p;
- gcc_assert(p->field_name() == "in");
+ go_assert(p->is_field_name("in"));
vals->push_back(this->type_descriptor_params(p->type(), this->receiver(),
this->parameters()));
++p;
- gcc_assert(p->field_name() == "out");
+ go_assert(p->is_field_name("out"));
vals->push_back(this->type_descriptor_params(p->type(), NULL,
this->results()));
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
return Expression::make_struct_composite_literal(ftdt, vals, bloc);
}
const Typed_identifier* receiver,
const Typed_identifier_list* params)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
if (receiver == NULL && params == NULL)
return Expression::make_slice_composite_literal(params_type, NULL, bloc);
+ (receiver != NULL ? 1 : 0));
if (receiver != NULL)
- {
- Type* rtype = receiver->type();
- // The receiver is always passed as a pointer. FIXME: Is this
- // right? Should that fact affect the type descriptor?
- if (rtype->points_to() == NULL)
- rtype = Type::make_pointer_type(rtype);
- vals->push_back(Expression::make_type_descriptor(rtype, bloc));
- }
+ vals->push_back(Expression::make_type_descriptor(receiver->type(), bloc));
if (params != NULL)
{
{
// FIXME: Turn this off until we straighten out the type of the
// struct field used in a go statement which calls a method.
- // gcc_assert(this->receiver_ == NULL);
+ // go_assert(this->receiver_ == NULL);
ret->append("func");
first = false;
else
exp->write_c_string(", ");
+ exp->write_name(p->name());
+ exp->write_c_string(" ");
if (!is_varargs || p + 1 != this->parameters_->end())
exp->write_type(p->type());
else
if (results != NULL)
{
exp->write_c_string(" ");
- if (results->size() == 1)
+ if (results->size() == 1 && results->begin()->name().empty())
exp->write_type(results->begin()->type());
else
{
first = false;
else
exp->write_c_string(", ");
+ exp->write_name(p->name());
+ exp->write_c_string(" ");
exp->write_type(p->type());
}
exp->write_c_string(")");
parameters = new Typed_identifier_list();
while (true)
{
+ std::string name = imp->read_name();
+ imp->require_c_string(" ");
+
if (imp->match_c_string("..."))
{
imp->advance(3);
Type* ptype = imp->read_type();
if (is_varargs)
ptype = Type::make_array_type(ptype, NULL);
- parameters->push_back(Typed_identifier(Import::import_marker,
- ptype, imp->location()));
+ parameters->push_back(Typed_identifier(name, ptype,
+ imp->location()));
if (imp->peek_char() != ',')
break;
- gcc_assert(!is_varargs);
+ go_assert(!is_varargs);
imp->require_c_string(", ");
}
}
if (imp->peek_char() != '(')
{
Type* rtype = imp->read_type();
- results->push_back(Typed_identifier(Import::import_marker, rtype,
- imp->location()));
+ results->push_back(Typed_identifier("", rtype, imp->location()));
}
else
{
imp->advance(1);
while (true)
{
+ std::string name = imp->read_name();
+ imp->require_c_string(" ");
Type* rtype = imp->read_type();
- results->push_back(Typed_identifier(Import::import_marker,
- rtype, imp->location()));
+ results->push_back(Typed_identifier(name, rtype,
+ imp->location()));
if (imp->peek_char() != ',')
break;
imp->require_c_string(", ");
Function_type*
Function_type::copy_without_receiver() const
{
- gcc_assert(this->is_method());
+ go_assert(this->is_method());
Function_type *ret = Type::make_function_type(NULL, this->parameters_,
this->results_,
this->location_);
Function_type*
Function_type::copy_with_receiver(Type* receiver_type) const
{
- gcc_assert(!this->is_method());
+ go_assert(!this->is_method());
Typed_identifier* receiver = new Typed_identifier("", receiver_type,
this->location_);
return Type::make_function_type(receiver, this->parameters_,
Type::make_function_type(Typed_identifier* receiver,
Typed_identifier_list* parameters,
Typed_identifier_list* results,
- source_location location)
+ Location location)
{
return new Function_type(receiver, parameters, results, location);
}
return this->to_type_->hash_for_method(gogo) << 4;
}
-// The tree for a pointer type.
-
-tree
-Pointer_type::do_get_tree(Gogo* gogo)
-{
- return build_pointer_type(this->to_type_->get_tree(gogo));
-}
-
-// Initialize a pointer type.
+// Get the backend representation for a pointer type.
-tree
-Pointer_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
+Btype*
+Pointer_type::do_get_backend(Gogo* gogo)
{
- if (is_clear)
- return NULL;
- return fold_convert(type_tree, null_pointer_node);
+ Btype* to_btype = this->to_type_->get_backend(gogo);
+ return gogo->backend()->pointer_type(to_btype);
}
// The type of a pointer type descriptor.
{
if (this->is_unsafe_pointer_type())
{
- gcc_assert(name != NULL);
+ go_assert(name != NULL);
return this->plain_type_descriptor(gogo,
RUNTIME_TYPE_KIND_UNSAFE_POINTER,
name);
}
else
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
const Methods* methods;
Type* deref = this->points_to();
vals->reserve(2);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "commonType");
+ go_assert(p->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_PTR,
name, methods, false));
++p;
- gcc_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(deref, bloc));
return Expression::make_struct_composite_literal(ptr_tdt, vals, bloc);
{ }
protected:
- tree
- do_get_tree(Gogo*)
- { return ptr_type_node; }
+ bool
+ do_compare_is_identity(Gogo*) const
+ { return false; }
- tree
- do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
- { return is_clear ? NULL : fold_convert(type_tree, null_pointer_node); }
+ Btype*
+ do_get_backend(Gogo* gogo)
+ { return gogo->backend()->pointer_type(gogo->backend()->void_type()); }
Expression*
do_type_descriptor(Gogo*, Named_type*)
- { gcc_unreachable(); }
+ { go_unreachable(); }
void
do_reflection(Gogo*, std::string*) const
- { gcc_unreachable(); }
+ { go_unreachable(); }
void
do_mangled_name(Gogo*, std::string* ret) const
bool
do_has_pointer() const
{
- gcc_assert(saw_errors());
+ go_assert(saw_errors());
return false;
}
- tree
- do_get_tree(Gogo*);
+ bool
+ do_compare_is_identity(Gogo*) const
+ { return false; }
- tree
- do_get_init_tree(Gogo*, tree, bool)
+ Btype*
+ do_get_backend(Gogo* gogo)
{
- gcc_assert(saw_errors());
- return error_mark_node;
+ go_assert(saw_errors());
+ return gogo->backend()->error_type();
}
Expression*
do_type_descriptor(Gogo*, Named_type*)
{
- gcc_assert(saw_errors());
- return Expression::make_error(UNKNOWN_LOCATION);
+ go_assert(saw_errors());
+ return Expression::make_error(Linemap::unknown_location());
}
void
do_reflection(Gogo*, std::string*) const
- { gcc_assert(saw_errors()); }
+ { go_assert(saw_errors()); }
void
do_mangled_name(Gogo*, std::string*) const
- { gcc_assert(saw_errors()); }
+ { go_assert(saw_errors()); }
private:
// The expression being called.
Call_expression* call_;
};
-// Return the tree for a call result.
-
-tree
-Call_multiple_result_type::do_get_tree(Gogo* gogo)
-{
- Function_type* fntype = this->call_->get_function_type();
- 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);
-}
-
// Make a call result type.
Type*
{
// Avoid crashing in the erroneous case where T is named but
// DT is not.
- gcc_assert(t != dt);
+ go_assert(t != dt);
if (t->forward_declaration_type() != NULL)
return t->forward_declaration_type()->name();
else if (t->named_type() != NULL)
return t->named_type()->name();
else
- gcc_unreachable();
+ go_unreachable();
}
}
}
+// Return whether this field is named NAME.
+
+bool
+Struct_field::is_field_name(const std::string& name) const
+{
+ const std::string& me(this->typed_identifier_.name());
+ if (!me.empty())
+ return me == name;
+ else
+ {
+ Type* t = this->typed_identifier_.type();
+ if (t->points_to() != NULL)
+ t = t->points_to();
+ Named_type* nt = t->named_type();
+ if (nt != NULL && nt->name() == name)
+ return true;
+
+ // This is a horrible hack caused by the fact that we don't pack
+ // the names of builtin types. FIXME.
+ if (nt != NULL
+ && nt->is_builtin()
+ && nt->name() == Gogo::unpack_hidden_name(name))
+ return true;
+
+ return false;
+ }
+}
+
// Class Struct_type.
// Traversal.
Struct_field_list* fields = this->fields_;
if (fields == NULL)
return true;
- bool ret = true;
for (Struct_field_list::iterator p = fields->begin();
p != fields->end();
++p)
{
error_at(p->location(), "struct field type is incomplete");
p->set_type(Type::make_error_type());
- ret = false;
}
else if (p->is_anonymous())
{
{
error_at(p->location(), "embedded type may not be a pointer");
p->set_type(Type::make_error_type());
- return false;
+ }
+ else if (t->points_to() != NULL
+ && t->points_to()->interface_type() != NULL)
+ {
+ error_at(p->location(),
+ "embedded type may not be pointer to interface");
+ p->set_type(Type::make_error_type());
}
}
}
- return ret;
+ return true;
}
// Whether this contains a pointer.
if (pf->type()->has_hidden_fields(within, reason))
return true;
}
-
- return false;
+
+ return false;
+}
+
+// Whether comparisons of this struct type are simple identity
+// comparisons.
+
+bool
+Struct_type::do_compare_is_identity(Gogo* gogo) const
+{
+ const Struct_field_list* fields = this->fields_;
+ if (fields == NULL)
+ return true;
+ unsigned int offset = 0;
+ for (Struct_field_list::const_iterator pf = fields->begin();
+ pf != fields->end();
+ ++pf)
+ {
+ if (!pf->type()->compare_is_identity(gogo))
+ return false;
+
+ unsigned int field_align;
+ if (!pf->type()->backend_type_align(gogo, &field_align))
+ return false;
+ if ((offset & (field_align - 1)) != 0)
+ {
+ // This struct has padding. We don't guarantee that that
+ // padding is zero-initialized for a stack variable, so we
+ // can't use memcmp to compare struct values.
+ return false;
+ }
+
+ unsigned int field_size;
+ if (!pf->type()->backend_type_size(gogo, &field_size))
+ return false;
+ offset += field_size;
+ }
+ return true;
}
+// Build identity and hash functions for this struct.
+
// Hash code.
unsigned int
pf != fields->end();
++pf, ++i)
{
- if (pf->field_name() == name)
+ if (pf->is_field_name(name))
{
if (pindex != NULL)
*pindex = i;
Field_reference_expression*
Struct_type::field_reference(Expression* struct_expr, const std::string& name,
- source_location location) const
+ Location location) const
{
unsigned int depth;
- return this->field_reference_depth(struct_expr, name, location, &depth);
+ return this->field_reference_depth(struct_expr, name, location, NULL,
+ &depth);
}
// Return an expression for a field, along with the depth at which it
Field_reference_expression*
Struct_type::field_reference_depth(Expression* struct_expr,
const std::string& name,
- source_location location,
+ Location location,
+ Saw_named_type* saw,
unsigned int* depth) const
{
const Struct_field_list* fields = this->fields_;
pf != fields->end();
++pf, ++i)
{
- if (pf->field_name() == name)
+ if (pf->is_field_name(name))
{
*depth = 0;
return Expression::make_field_reference(struct_expr, i, location);
if (st == NULL)
continue;
+ Saw_named_type* hold_saw = saw;
+ Saw_named_type saw_here;
+ Named_type* nt = pf->type()->named_type();
+ if (nt == NULL)
+ nt = pf->type()->deref()->named_type();
+ if (nt != NULL)
+ {
+ Saw_named_type* q;
+ for (q = saw; q != NULL; q = q->next)
+ {
+ if (q->nt == nt)
+ {
+ // If this is an error, it will be reported
+ // elsewhere.
+ break;
+ }
+ }
+ if (q != NULL)
+ continue;
+ saw_here.next = saw;
+ saw_here.nt = nt;
+ saw = &saw_here;
+ }
+
// Look for a reference using a NULL struct expression. If we
// find one, fill in the struct expression with a reference to
// this field.
unsigned int subdepth;
Field_reference_expression* sub = st->field_reference_depth(NULL, name,
location,
+ saw,
&subdepth);
+
+ saw = hold_saw;
+
if (sub == NULL)
continue;
while (sub->expr() != NULL)
{
sub = sub->expr()->deref()->field_reference_expression();
- gcc_assert(sub != NULL);
+ go_assert(sub != NULL);
}
sub->set_struct_expression(here);
}
pf != this->fields_->end();
++pf)
{
- if (!pf->is_anonymous() || pf->type()->deref()->struct_type() == NULL)
+ if (!pf->is_anonymous() || pf->type()->struct_type() == NULL)
++ret;
else
ret += pf->type()->struct_type()->total_field_count();
return Type::method_function(this->all_methods_, name, is_ambiguous);
}
-// Get the tree for a struct type.
-
-tree
-Struct_type::do_get_tree(Gogo* gogo)
-{
- tree type = make_node(RECORD_TYPE);
- return this->fill_in_tree(gogo, type);
-}
-
-// Fill in the fields for a struct type.
+// Convert struct fields to the backend representation. This is not
+// declared in types.h so that types.h doesn't have to #include
+// backend.h.
-tree
-Struct_type::fill_in_tree(Gogo* gogo, tree type)
+static void
+get_backend_struct_fields(Gogo* gogo, const Struct_field_list* fields,
+ bool use_placeholder,
+ std::vector<Backend::Btyped_identifier>* bfields)
{
- 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 = build_decl(p->location(), FIELD_DECL, name_tree,
- field_type_tree);
- DECL_CONTEXT(field) = type;
- *pp = field;
- pp = &DECL_CHAIN(field);
- }
-
- TYPE_FIELDS(type) = field_trees;
-
- layout_type(type);
-
- if (has_pointer)
+ bfields->resize(fields->size());
+ size_t i = 0;
+ for (Struct_field_list::const_iterator p = fields->begin();
+ p != fields->end();
+ ++p, ++i)
{
- 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);
- }
+ (*bfields)[i].name = Gogo::unpack_hidden_name(p->field_name());
+ (*bfields)[i].btype = (use_placeholder
+ ? p->type()->get_backend_placeholder(gogo)
+ : p->type()->get_backend(gogo));
+ (*bfields)[i].location = p->location();
}
-
- return type;
+ go_assert(i == fields->size());
}
-// Make sure that all structs which must be converted to the backend
-// representation before this one are in fact converted.
+// Get the tree for a struct type.
-void
-Struct_type::convert_prerequisites(Gogo* gogo)
+Btype*
+Struct_type::do_get_backend(Gogo* gogo)
{
- for (std::vector<Named_type*>::const_iterator p
- = this->prerequisites_.begin();
- p != this->prerequisites_.end();
- ++p)
- (*p)->get_tree(gogo);
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_struct_fields(gogo, this->fields_, false, &bfields);
+ return gogo->backend()->struct_type(bfields);
}
-// Initialize struct fields.
+// Finish the backend representation of the fields of a struct.
-tree
-Struct_type::do_get_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
+void
+Struct_type::finish_backend_fields(Gogo* gogo)
{
- if (this->fields_ == NULL || this->fields_->empty())
- {
- if (is_clear)
- return NULL;
- else
- {
- tree ret = build_constructor(type_tree,
- VEC_alloc(constructor_elt, gc, 0));
- TREE_CONSTANT(ret) = 1;
- return ret;
- }
- }
-
- bool is_constant = true;
- bool any_fields_set = false;
- VEC(constructor_elt,gc)* init = VEC_alloc(constructor_elt, gc,
- this->fields_->size());
-
- tree field = TYPE_FIELDS(type_tree);
- for (Struct_field_list::const_iterator p = this->fields_->begin();
- p != this->fields_->end();
- ++p, field = DECL_CHAIN(field))
- {
- tree value = p->type()->get_init_tree(gogo, is_clear);
- if (value == error_mark_node)
- return error_mark_node;
- gcc_assert(field != NULL_TREE);
- if (value != NULL)
- {
- constructor_elt* elt = VEC_quick_push(constructor_elt, init, NULL);
- elt->index = field;
- elt->value = value;
- any_fields_set = true;
- if (!TREE_CONSTANT(value))
- is_constant = false;
- }
- }
- gcc_assert(field == NULL_TREE);
-
- if (!any_fields_set)
+ const Struct_field_list* fields = this->fields_;
+ if (fields != NULL)
{
- gcc_assert(is_clear);
- VEC_free(constructor_elt, gc, init);
- return NULL;
+ for (Struct_field_list::const_iterator p = fields->begin();
+ p != fields->end();
+ ++p)
+ p->type()->get_backend(gogo);
}
-
- tree ret = build_constructor(type_tree, init);
- if (is_constant)
- TREE_CONSTANT(ret) = 1;
- return ret;
}
// The type of a struct type descriptor.
Expression*
Struct_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* stdt = Struct_type::make_struct_type_descriptor_type();
const Methods* methods = this->methods();
// A named struct should not have methods--the methods should attach
// to the named type.
- gcc_assert(methods == NULL || name == NULL);
+ go_assert(methods == NULL || name == NULL);
Struct_field_list::const_iterator ps = fields->begin();
- gcc_assert(ps->field_name() == "commonType");
+ go_assert(ps->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_STRUCT,
name, methods, true));
++ps;
- gcc_assert(ps->field_name() == "fields");
+ go_assert(ps->is_field_name("fields"));
Expression_list* elements = new Expression_list();
elements->reserve(this->fields_->size());
fvals->reserve(5);
Struct_field_list::const_iterator q = f->begin();
- gcc_assert(q->field_name() == "name");
+ go_assert(q->is_field_name("name"));
if (pf->is_anonymous())
fvals->push_back(Expression::make_nil(bloc));
else
}
++q;
- gcc_assert(q->field_name() == "pkgPath");
+ go_assert(q->is_field_name("pkgPath"));
if (!Gogo::is_hidden_name(pf->field_name()))
fvals->push_back(Expression::make_nil(bloc));
else
}
++q;
- gcc_assert(q->field_name() == "typ");
+ go_assert(q->is_field_name("typ"));
fvals->push_back(Expression::make_type_descriptor(pf->type(), bloc));
++q;
- gcc_assert(q->field_name() == "tag");
+ go_assert(q->is_field_name("tag"));
if (!pf->has_tag())
fvals->push_back(Expression::make_nil(bloc));
else
}
++q;
- gcc_assert(q->field_name() == "offset");
+ go_assert(q->is_field_name("offset"));
fvals->push_back(Expression::make_struct_field_offset(this, &*pf));
Expression* v = Expression::make_struct_composite_literal(element_type,
return Expression::make_struct_composite_literal(stdt, vals, bloc);
}
+// Write the hash function for a struct which can not use the identity
+// function.
+
+void
+Struct_type::write_hash_function(Gogo* gogo, Named_type*,
+ Function_type* hash_fntype,
+ Function_type* equal_fntype)
+{
+ Location bloc = Linemap::predeclared_location();
+
+ // The pointer to the struct that we are going to hash. This is an
+ // argument to the hash function we are implementing here.
+ Named_object* key_arg = gogo->lookup("key", NULL);
+ go_assert(key_arg != NULL);
+ Type* key_arg_type = key_arg->var_value()->type();
+
+ Type* uintptr_type = Type::lookup_integer_type("uintptr");
+
+ // Get a 0.
+ mpz_t ival;
+ mpz_init_set_ui(ival, 0);
+ Expression* zero = Expression::make_integer(&ival, uintptr_type, bloc);
+ mpz_clear(ival);
+
+ // Make a temporary to hold the return value, initialized to 0.
+ Temporary_statement* retval = Statement::make_temporary(uintptr_type, zero,
+ bloc);
+ gogo->add_statement(retval);
+
+ // Make a temporary to hold the key as a uintptr.
+ Expression* ref = Expression::make_var_reference(key_arg, bloc);
+ ref = Expression::make_cast(uintptr_type, ref, bloc);
+ Temporary_statement* key = Statement::make_temporary(uintptr_type, ref,
+ bloc);
+ gogo->add_statement(key);
+
+ // Loop over the struct fields.
+ bool first = true;
+ const Struct_field_list* fields = this->fields_;
+ for (Struct_field_list::const_iterator pf = fields->begin();
+ pf != fields->end();
+ ++pf)
+ {
+ if (first)
+ first = false;
+ else
+ {
+ // Multiply retval by 33.
+ mpz_init_set_ui(ival, 33);
+ Expression* i33 = Expression::make_integer(&ival, uintptr_type,
+ bloc);
+ mpz_clear(ival);
+
+ ref = Expression::make_temporary_reference(retval, bloc);
+ Statement* s = Statement::make_assignment_operation(OPERATOR_MULTEQ,
+ ref, i33, bloc);
+ gogo->add_statement(s);
+ }
+
+ // Get a pointer to the value of this field.
+ Expression* offset = Expression::make_struct_field_offset(this, &*pf);
+ ref = Expression::make_temporary_reference(key, bloc);
+ Expression* subkey = Expression::make_binary(OPERATOR_PLUS, ref, offset,
+ bloc);
+ subkey = Expression::make_cast(key_arg_type, subkey, bloc);
+
+ // Get the size of this field.
+ Expression* size = Expression::make_type_info(pf->type(),
+ Expression::TYPE_INFO_SIZE);
+
+ // Get the hash function to use for the type of this field.
+ Named_object* hash_fn;
+ Named_object* equal_fn;
+ pf->type()->type_functions(gogo, pf->type()->named_type(), hash_fntype,
+ equal_fntype, &hash_fn, &equal_fn);
+
+ // Call the hash function for the field.
+ Expression_list* args = new Expression_list();
+ args->push_back(subkey);
+ args->push_back(size);
+ Expression* func = Expression::make_func_reference(hash_fn, NULL, bloc);
+ Expression* call = Expression::make_call(func, args, false, bloc);
+
+ // Add the field's hash value to retval.
+ Temporary_reference_expression* tref =
+ Expression::make_temporary_reference(retval, bloc);
+ tref->set_is_lvalue();
+ Statement* s = Statement::make_assignment_operation(OPERATOR_PLUSEQ,
+ tref, call, bloc);
+ gogo->add_statement(s);
+ }
+
+ // Return retval to the caller of the hash function.
+ Expression_list* vals = new Expression_list();
+ ref = Expression::make_temporary_reference(retval, bloc);
+ vals->push_back(ref);
+ Statement* s = Statement::make_return_statement(vals, bloc);
+ gogo->add_statement(s);
+}
+
+// Write the equality function for a struct which can not use the
+// identity function.
+
+void
+Struct_type::write_equal_function(Gogo* gogo, Named_type* name)
+{
+ Location bloc = Linemap::predeclared_location();
+
+ // The pointers to the structs we are going to compare.
+ Named_object* key1_arg = gogo->lookup("key1", NULL);
+ Named_object* key2_arg = gogo->lookup("key2", NULL);
+ go_assert(key1_arg != NULL && key2_arg != NULL);
+
+ // Build temporaries with the right types.
+ Type* pt = Type::make_pointer_type(name != NULL
+ ? static_cast<Type*>(name)
+ : static_cast<Type*>(this));
+
+ Expression* ref = Expression::make_var_reference(key1_arg, bloc);
+ ref = Expression::make_unsafe_cast(pt, ref, bloc);
+ Temporary_statement* p1 = Statement::make_temporary(pt, ref, bloc);
+ gogo->add_statement(p1);
+
+ ref = Expression::make_var_reference(key2_arg, bloc);
+ ref = Expression::make_unsafe_cast(pt, ref, bloc);
+ Temporary_statement* p2 = Statement::make_temporary(pt, ref, bloc);
+ gogo->add_statement(p2);
+
+ const Struct_field_list* fields = this->fields_;
+ unsigned int field_index = 0;
+ for (Struct_field_list::const_iterator pf = fields->begin();
+ pf != fields->end();
+ ++pf, ++field_index)
+ {
+ // Compare one field in both P1 and P2.
+ Expression* f1 = Expression::make_temporary_reference(p1, bloc);
+ f1 = Expression::make_unary(OPERATOR_MULT, f1, bloc);
+ f1 = Expression::make_field_reference(f1, field_index, bloc);
+
+ Expression* f2 = Expression::make_temporary_reference(p2, bloc);
+ f2 = Expression::make_unary(OPERATOR_MULT, f2, bloc);
+ f2 = Expression::make_field_reference(f2, field_index, bloc);
+
+ Expression* cond = Expression::make_binary(OPERATOR_NOTEQ, f1, f2, bloc);
+
+ // If the values are not equal, return false.
+ gogo->start_block(bloc);
+ Expression_list* vals = new Expression_list();
+ vals->push_back(Expression::make_boolean(false, bloc));
+ Statement* s = Statement::make_return_statement(vals, bloc);
+ gogo->add_statement(s);
+ Block* then_block = gogo->finish_block(bloc);
+
+ s = Statement::make_if_statement(cond, then_block, NULL, bloc);
+ gogo->add_statement(s);
+ }
+
+ // All the fields are equal, so return true.
+ Expression_list* vals = new Expression_list();
+ vals->push_back(Expression::make_boolean(true, bloc));
+ Statement* s = Statement::make_return_statement(vals, bloc);
+ gogo->add_statement(s);
+}
+
// Reflection string.
void
ret->push_back('e');
}
+// If the offset of field INDEX in the backend implementation can be
+// determined, set *POFFSET to the offset in bytes and return true.
+// Otherwise, return false.
+
+bool
+Struct_type::backend_field_offset(Gogo* gogo, unsigned int index,
+ unsigned int* poffset)
+{
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ Btype* bt = this->get_backend_placeholder(gogo);
+ size_t offset = gogo->backend()->type_field_offset(bt, index);
+ *poffset = static_cast<unsigned int>(offset);
+ if (*poffset != offset)
+ return false;
+ return true;
+}
+
// Export.
void
{
exp->write_c_string("struct { ");
const Struct_field_list* fields = this->fields_;
- gcc_assert(fields != NULL);
+ go_assert(fields != NULL);
for (Struct_field_list::const_iterator p = fields->begin();
p != fields->end();
++p)
if (p->has_tag())
{
exp->write_c_string(" ");
- Expression* expr = Expression::make_string(p->tag(),
- BUILTINS_LOCATION);
+ Expression* expr =
+ Expression::make_string(p->tag(), Linemap::predeclared_location());
expr->export_expression(exp);
delete expr;
}
imp->advance(1);
Expression* expr = Expression::import_expression(imp);
String_expression* sexpr = expr->string_expression();
- gcc_assert(sexpr != NULL);
+ go_assert(sexpr != NULL);
sf.set_tag(sexpr->val());
delete sexpr;
}
Struct_type*
Type::make_struct_type(Struct_field_list* fields,
- source_location location)
+ Location location)
{
return new Struct_type(fields, location);
}
{
if (this->length_ == NULL)
return true;
+
+ Type_context context(Type::lookup_integer_type("int"), false);
+ this->length_->determine_type(&context);
+
if (!this->length_->is_constant())
{
error_at(this->length_->location(), "array bound is not constant");
}
mpz_t val;
-
- Type* t = this->length_->type();
- if (t->integer_type() != NULL)
- {
- Type* vt;
- mpz_init(val);
- if (!this->length_->integer_constant_value(true, val, &vt))
- {
- error_at(this->length_->location(),
- "array bound is not constant");
- mpz_clear(val);
- return false;
- }
- }
- else if (t->float_type() != NULL)
+ mpz_init(val);
+ Type* vt;
+ if (!this->length_->integer_constant_value(true, val, &vt))
{
- Type* vt;
mpfr_t fval;
mpfr_init(fval);
if (!this->length_->float_constant_value(fval, &vt))
{
- error_at(this->length_->location(),
- "array bound is not constant");
+ if (this->length_->type()->integer_type() != NULL
+ || this->length_->type()->float_type() != NULL)
+ error_at(this->length_->location(),
+ "array bound is not constant");
+ else
+ error_at(this->length_->location(),
+ "array bound is not numeric");
mpfr_clear(fval);
+ mpz_clear(val);
return false;
}
if (!mpfr_integer_p(fval))
error_at(this->length_->location(),
"array bound truncated to integer");
mpfr_clear(fval);
+ mpz_clear(val);
return false;
}
mpz_init(val);
mpfr_get_z(val, fval, GMP_RNDN);
mpfr_clear(fval);
}
- else
- {
- if (!t->is_error_type())
- error_at(this->length_->location(), "array bound is not numeric");
- return false;
- }
if (mpz_sgn(val) < 0)
{
Array_type::do_verify()
{
if (!this->verify_length())
- {
- this->length_ = Expression::make_error(this->length_->location());
- return false;
- }
+ this->length_ = Expression::make_error(this->length_->location());
+ return true;
+}
+
+// Whether we can use memcmp to compare this array.
+
+bool
+Array_type::do_compare_is_identity(Gogo* gogo) const
+{
+ if (this->length_ == NULL)
+ return false;
+
+ // Check for [...], which indicates that this is not a real type.
+ if (this->length_->is_nil_expression())
+ return false;
+
+ if (!this->element_type_->compare_is_identity(gogo))
+ return false;
+
+ // If there is any padding, then we can't use memcmp.
+ unsigned int size;
+ unsigned int align;
+ if (!this->element_type_->backend_type_size(gogo, &size)
+ || !this->element_type_->backend_type_align(gogo, &align))
+ return false;
+ if ((size & (align - 1)) != 0)
+ return false;
+
return true;
}
return this->element_type_->hash_for_method(gogo) + 1;
}
-// See if the expression passed to make is suitable. The first
-// argument is required, and gives the length. An optional second
-// argument is permitted for the capacity.
+// Write the hash function for an array which can not use the identify
+// function.
-bool
-Array_type::do_check_make_expression(Expression_list* args,
- source_location location)
+void
+Array_type::write_hash_function(Gogo* gogo, Named_type* name,
+ Function_type* hash_fntype,
+ Function_type* equal_fntype)
+{
+ Location bloc = Linemap::predeclared_location();
+
+ // The pointer to the array that we are going to hash. This is an
+ // argument to the hash function we are implementing here.
+ Named_object* key_arg = gogo->lookup("key", NULL);
+ go_assert(key_arg != NULL);
+ Type* key_arg_type = key_arg->var_value()->type();
+
+ Type* uintptr_type = Type::lookup_integer_type("uintptr");
+
+ // Get a 0.
+ mpz_t ival;
+ mpz_init_set_ui(ival, 0);
+ Expression* zero = Expression::make_integer(&ival, uintptr_type, bloc);
+ mpz_clear(ival);
+
+ // Make a temporary to hold the return value, initialized to 0.
+ Temporary_statement* retval = Statement::make_temporary(uintptr_type, zero,
+ bloc);
+ gogo->add_statement(retval);
+
+ // Make a temporary to hold the key as a uintptr.
+ Expression* ref = Expression::make_var_reference(key_arg, bloc);
+ ref = Expression::make_cast(uintptr_type, ref, bloc);
+ Temporary_statement* key = Statement::make_temporary(uintptr_type, ref,
+ bloc);
+ gogo->add_statement(key);
+
+ // Loop over the array elements.
+ // for i = range a
+ Type* int_type = Type::lookup_integer_type("int");
+ Temporary_statement* index = Statement::make_temporary(int_type, NULL, bloc);
+ gogo->add_statement(index);
+
+ Expression* iref = Expression::make_temporary_reference(index, bloc);
+ Expression* aref = Expression::make_var_reference(key_arg, bloc);
+ Type* pt = Type::make_pointer_type(name != NULL
+ ? static_cast<Type*>(name)
+ : static_cast<Type*>(this));
+ aref = Expression::make_cast(pt, aref, bloc);
+ For_range_statement* for_range = Statement::make_for_range_statement(iref,
+ NULL,
+ aref,
+ bloc);
+
+ gogo->start_block(bloc);
+
+ // Multiply retval by 33.
+ mpz_init_set_ui(ival, 33);
+ Expression* i33 = Expression::make_integer(&ival, uintptr_type, bloc);
+ mpz_clear(ival);
+
+ ref = Expression::make_temporary_reference(retval, bloc);
+ Statement* s = Statement::make_assignment_operation(OPERATOR_MULTEQ, ref,
+ i33, bloc);
+ gogo->add_statement(s);
+
+ // Get the hash function for the element type.
+ Named_object* hash_fn;
+ Named_object* equal_fn;
+ this->element_type_->type_functions(gogo, this->element_type_->named_type(),
+ hash_fntype, equal_fntype, &hash_fn,
+ &equal_fn);
+
+ // Get a pointer to this element in the loop.
+ Expression* subkey = Expression::make_temporary_reference(key, bloc);
+ subkey = Expression::make_cast(key_arg_type, subkey, bloc);
+
+ // Get the size of each element.
+ Expression* ele_size = Expression::make_type_info(this->element_type_,
+ Expression::TYPE_INFO_SIZE);
+
+ // Get the hash of this element.
+ Expression_list* args = new Expression_list();
+ args->push_back(subkey);
+ args->push_back(ele_size);
+ Expression* func = Expression::make_func_reference(hash_fn, NULL, bloc);
+ Expression* call = Expression::make_call(func, args, false, bloc);
+
+ // Add the element's hash value to retval.
+ Temporary_reference_expression* tref =
+ Expression::make_temporary_reference(retval, bloc);
+ tref->set_is_lvalue();
+ s = Statement::make_assignment_operation(OPERATOR_PLUSEQ, tref, call, bloc);
+ gogo->add_statement(s);
+
+ // Increase the element pointer.
+ tref = Expression::make_temporary_reference(key, bloc);
+ tref->set_is_lvalue();
+ s = Statement::make_assignment_operation(OPERATOR_PLUSEQ, tref, ele_size,
+ bloc);
+
+ Block* statements = gogo->finish_block(bloc);
+
+ for_range->add_statements(statements);
+ gogo->add_statement(for_range);
+
+ // Return retval to the caller of the hash function.
+ Expression_list* vals = new Expression_list();
+ ref = Expression::make_temporary_reference(retval, bloc);
+ vals->push_back(ref);
+ s = Statement::make_return_statement(vals, bloc);
+ gogo->add_statement(s);
+}
+
+// Write the equality function for an array which can not use the
+// identity function.
+
+void
+Array_type::write_equal_function(Gogo* gogo, Named_type* name)
{
- gcc_assert(this->length_ == NULL);
- if (args == NULL || args->empty())
- {
- error_at(location, "length required when allocating a slice");
- return false;
- }
- else if (args->size() > 2)
- {
- error_at(location, "too many expressions passed to make");
- return false;
- }
- else
- {
- if (!Type::check_int_value(args->front(),
- _("bad length when making slice"), location))
- return false;
+ Location bloc = Linemap::predeclared_location();
- if (args->size() > 1)
- {
- if (!Type::check_int_value(args->back(),
- _("bad capacity when making slice"),
- location))
- return false;
- }
+ // The pointers to the arrays we are going to compare.
+ Named_object* key1_arg = gogo->lookup("key1", NULL);
+ Named_object* key2_arg = gogo->lookup("key2", NULL);
+ go_assert(key1_arg != NULL && key2_arg != NULL);
- return true;
- }
+ // Build temporaries for the keys with the right types.
+ Type* pt = Type::make_pointer_type(name != NULL
+ ? static_cast<Type*>(name)
+ : static_cast<Type*>(this));
+
+ Expression* ref = Expression::make_var_reference(key1_arg, bloc);
+ ref = Expression::make_unsafe_cast(pt, ref, bloc);
+ Temporary_statement* p1 = Statement::make_temporary(pt, ref, bloc);
+ gogo->add_statement(p1);
+
+ ref = Expression::make_var_reference(key2_arg, bloc);
+ ref = Expression::make_unsafe_cast(pt, ref, bloc);
+ Temporary_statement* p2 = Statement::make_temporary(pt, ref, bloc);
+ gogo->add_statement(p2);
+
+ // Loop over the array elements.
+ // for i = range a
+ Type* int_type = Type::lookup_integer_type("int");
+ Temporary_statement* index = Statement::make_temporary(int_type, NULL, bloc);
+ gogo->add_statement(index);
+
+ Expression* iref = Expression::make_temporary_reference(index, bloc);
+ Expression* aref = Expression::make_temporary_reference(p1, bloc);
+ For_range_statement* for_range = Statement::make_for_range_statement(iref,
+ NULL,
+ aref,
+ bloc);
+
+ gogo->start_block(bloc);
+
+ // Compare element in P1 and P2.
+ Expression* e1 = Expression::make_temporary_reference(p1, bloc);
+ e1 = Expression::make_unary(OPERATOR_MULT, e1, bloc);
+ ref = Expression::make_temporary_reference(index, bloc);
+ e1 = Expression::make_array_index(e1, ref, NULL, bloc);
+
+ Expression* e2 = Expression::make_temporary_reference(p2, bloc);
+ e2 = Expression::make_unary(OPERATOR_MULT, e2, bloc);
+ ref = Expression::make_temporary_reference(index, bloc);
+ e2 = Expression::make_array_index(e2, ref, NULL, bloc);
+
+ Expression* cond = Expression::make_binary(OPERATOR_NOTEQ, e1, e2, bloc);
+
+ // If the elements are not equal, return false.
+ gogo->start_block(bloc);
+ Expression_list* vals = new Expression_list();
+ vals->push_back(Expression::make_boolean(false, bloc));
+ Statement* s = Statement::make_return_statement(vals, bloc);
+ gogo->add_statement(s);
+ Block* then_block = gogo->finish_block(bloc);
+
+ s = Statement::make_if_statement(cond, then_block, NULL, bloc);
+ gogo->add_statement(s);
+
+ Block* statements = gogo->finish_block(bloc);
+
+ for_range->add_statements(statements);
+ gogo->add_statement(for_range);
+
+ // All the elements are equal, so return true.
+ vals = new Expression_list();
+ vals->push_back(Expression::make_boolean(true, bloc));
+ s = Statement::make_return_statement(vals, bloc);
+ gogo->add_statement(s);
}
// Get a tree for the length of a fixed array. The length may be
tree
Array_type::get_length_tree(Gogo* gogo)
{
- gcc_assert(this->length_ != NULL);
+ go_assert(this->length_ != NULL);
if (this->length_tree_ == NULL_TREE)
{
mpz_t val;
t = Type::lookup_integer_type("int");
else if (t->is_abstract())
t = t->make_non_abstract_type();
- tree tt = t->get_tree(gogo);
+ tree tt = type_to_tree(t->get_backend(gogo));
this->length_tree_ = Expression::integer_constant_tree(val, tt);
mpz_clear(val);
}
// Make up a translation context for the array length
// expression. FIXME: This won't work in general.
- Translate_context context(gogo, NULL, NULL, NULL_TREE);
+ Translate_context context(gogo, NULL, NULL, NULL);
tree len = this->length_->get_tree(&context);
if (len != error_mark_node)
{
return this->length_tree_;
}
-// Get a tree for the type of this array. A fixed array is simply
-// represented as ARRAY_TYPE with the appropriate index--i.e., it is
-// just like an array in C. An open array is a struct with three
-// fields: a data pointer, the length, and the capacity.
+// Get the backend representation of the fields of a slice. This is
+// not declared in types.h so that types.h doesn't have to #include
+// backend.h.
+//
+// We use int for the count and capacity fields. This matches 6g.
+// The language more or less assumes that we can't allocate space of a
+// size which does not fit in int.
-tree
-Array_type::do_get_tree(Gogo* gogo)
+static void
+get_backend_slice_fields(Gogo* gogo, Array_type* type, bool use_placeholder,
+ std::vector<Backend::Btyped_identifier>* bfields)
{
- if (this->length_ == NULL)
- {
- tree struct_type = gogo->slice_type_tree(void_type_node);
- return this->fill_in_tree(gogo, struct_type);
- }
- else
- {
- tree element_type_tree = this->element_type_->get_tree(gogo);
- tree length_tree = this->get_length_tree(gogo);
- if (element_type_tree == error_mark_node
- || length_tree == error_mark_node)
- return error_mark_node;
-
- length_tree = fold_convert(sizetype, length_tree);
-
- // build_index_type takes the maximum index, which is one less
- // than the length.
- tree index_type = build_index_type(fold_build2(MINUS_EXPR, sizetype,
- length_tree,
- size_one_node));
+ bfields->resize(3);
- return build_array_type(element_type_tree, index_type);
- }
-}
+ Type* pet = Type::make_pointer_type(type->element_type());
+ Btype* pbet = (use_placeholder
+ ? pet->get_backend_placeholder(gogo)
+ : pet->get_backend(gogo));
+ Location ploc = Linemap::predeclared_location();
-// Fill in the fields for a slice type. This is used for named slice
-// types.
+ Backend::Btyped_identifier* p = &(*bfields)[0];
+ p->name = "__values";
+ p->btype = pbet;
+ p->location = ploc;
-tree
-Array_type::fill_in_tree(Gogo* gogo, tree struct_type)
-{
- gcc_assert(this->length_ == NULL);
+ Type* int_type = Type::lookup_integer_type("int");
- tree element_type_tree = this->element_type_->get_tree(gogo);
- tree field = TYPE_FIELDS(struct_type);
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)), "__values") == 0);
- gcc_assert(POINTER_TYPE_P(TREE_TYPE(field))
- && TREE_TYPE(TREE_TYPE(field)) == void_type_node);
- TREE_TYPE(field) = build_pointer_type(element_type_tree);
+ p = &(*bfields)[1];
+ p->name = "__count";
+ p->btype = int_type->get_backend(gogo);
+ p->location = ploc;
- return struct_type;
+ p = &(*bfields)[2];
+ p->name = "__capacity";
+ p->btype = int_type->get_backend(gogo);
+ p->location = ploc;
}
-// Return an initializer for an array type.
+// Get a tree for the type of this array. A fixed array is simply
+// represented as ARRAY_TYPE with the appropriate index--i.e., it is
+// just like an array in C. An open array is a struct with three
+// fields: a data pointer, the length, and the capacity.
-tree
-Array_type::do_get_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
+Btype*
+Array_type::do_get_backend(Gogo* gogo)
{
if (this->length_ == NULL)
{
- // Open array.
-
- if (is_clear)
- return NULL;
-
- gcc_assert(TREE_CODE(type_tree) == RECORD_TYPE);
-
- VEC(constructor_elt,gc)* init = VEC_alloc(constructor_elt, gc, 3);
-
- for (tree field = TYPE_FIELDS(type_tree);
- field != NULL_TREE;
- field = DECL_CHAIN(field))
- {
- constructor_elt* elt = VEC_quick_push(constructor_elt, init,
- NULL);
- elt->index = field;
- elt->value = fold_convert(TREE_TYPE(field), size_zero_node);
- }
-
- tree ret = build_constructor(type_tree, init);
- TREE_CONSTANT(ret) = 1;
- return ret;
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_slice_fields(gogo, this, false, &bfields);
+ return gogo->backend()->struct_type(bfields);
}
else
{
- // Fixed array.
-
- tree value = this->element_type_->get_init_tree(gogo, is_clear);
- if (value == NULL)
- return NULL;
- if (value == error_mark_node)
- return error_mark_node;
-
- tree length_tree = this->get_length_tree(gogo);
- if (length_tree == error_mark_node)
- return error_mark_node;
-
- length_tree = fold_convert(sizetype, length_tree);
- tree range = build2(RANGE_EXPR, sizetype, size_zero_node,
- fold_build2(MINUS_EXPR, sizetype,
- length_tree, size_one_node));
- tree ret = build_constructor_single(type_tree, range, value);
- if (TREE_CONSTANT(value))
- TREE_CONSTANT(ret) = 1;
- return ret;
+ Btype* element = this->get_backend_element(gogo, false);
+ Bexpression* len = this->get_backend_length(gogo);
+ return gogo->backend()->array_type(element, len);
}
}
-// Handle the builtin make function for a slice.
+// Return the backend representation of the element type.
-tree
-Array_type::do_make_expression_tree(Translate_context* context,
- Expression_list* args,
- source_location location)
+Btype*
+Array_type::get_backend_element(Gogo* gogo, bool use_placeholder)
{
- gcc_assert(this->length_ == NULL);
-
- Gogo* gogo = context->gogo();
- tree type_tree = this->get_tree(gogo);
- if (type_tree == error_mark_node)
- return error_mark_node;
-
- tree values_field = TYPE_FIELDS(type_tree);
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(values_field)),
- "__values") == 0);
-
- tree count_field = DECL_CHAIN(values_field);
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(count_field)),
- "__count") == 0);
-
- tree element_type_tree = this->element_type_->get_tree(gogo);
- if (element_type_tree == error_mark_node)
- return error_mark_node;
- tree element_size_tree = TYPE_SIZE_UNIT(element_type_tree);
-
- tree value = this->element_type_->get_init_tree(gogo, true);
-
- // The first argument is the number of elements, the optional second
- // argument is the capacity.
- gcc_assert(args != NULL && args->size() >= 1 && args->size() <= 2);
-
- tree length_tree = args->front()->get_tree(context);
- if (length_tree == error_mark_node)
- return error_mark_node;
- if (!DECL_P(length_tree))
- length_tree = save_expr(length_tree);
- if (!INTEGRAL_TYPE_P(TREE_TYPE(length_tree)))
- length_tree = convert_to_integer(TREE_TYPE(count_field), length_tree);
-
- tree bad_index = Expression::check_bounds(length_tree,
- TREE_TYPE(count_field),
- NULL_TREE, location);
-
- length_tree = fold_convert_loc(location, TREE_TYPE(count_field), length_tree);
- tree capacity_tree;
- if (args->size() == 1)
- capacity_tree = length_tree;
- else
- {
- capacity_tree = args->back()->get_tree(context);
- if (capacity_tree == error_mark_node)
- return error_mark_node;
- if (!DECL_P(capacity_tree))
- capacity_tree = save_expr(capacity_tree);
- if (!INTEGRAL_TYPE_P(TREE_TYPE(capacity_tree)))
- capacity_tree = convert_to_integer(TREE_TYPE(count_field),
- capacity_tree);
-
- bad_index = Expression::check_bounds(capacity_tree,
- TREE_TYPE(count_field),
- bad_index, location);
-
- tree chktype = (((TYPE_SIZE(TREE_TYPE(capacity_tree))
- > TYPE_SIZE(TREE_TYPE(length_tree)))
- || ((TYPE_SIZE(TREE_TYPE(capacity_tree))
- == TYPE_SIZE(TREE_TYPE(length_tree)))
- && TYPE_UNSIGNED(TREE_TYPE(capacity_tree))))
- ? TREE_TYPE(capacity_tree)
- : TREE_TYPE(length_tree));
- tree chk = fold_build2_loc(location, LT_EXPR, boolean_type_node,
- fold_convert_loc(location, chktype,
- capacity_tree),
- fold_convert_loc(location, chktype,
- length_tree));
- if (bad_index == NULL_TREE)
- bad_index = chk;
- else
- bad_index = fold_build2_loc(location, TRUTH_OR_EXPR, boolean_type_node,
- bad_index, chk);
-
- capacity_tree = fold_convert_loc(location, TREE_TYPE(count_field),
- capacity_tree);
- }
-
- tree size_tree = fold_build2_loc(location, MULT_EXPR, sizetype,
- element_size_tree,
- fold_convert_loc(location, sizetype,
- capacity_tree));
-
- tree chk = fold_build2_loc(location, TRUTH_AND_EXPR, boolean_type_node,
- fold_build2_loc(location, GT_EXPR,
- boolean_type_node,
- fold_convert_loc(location,
- sizetype,
- capacity_tree),
- size_zero_node),
- fold_build2_loc(location, LT_EXPR,
- boolean_type_node,
- size_tree, element_size_tree));
- if (bad_index == NULL_TREE)
- bad_index = chk;
+ if (use_placeholder)
+ return this->element_type_->get_backend_placeholder(gogo);
else
- bad_index = fold_build2_loc(location, TRUTH_OR_EXPR, boolean_type_node,
- bad_index, chk);
-
- tree space = context->gogo()->allocate_memory(this->element_type_,
- size_tree, location);
-
- if (value != NULL_TREE)
- space = save_expr(space);
+ return this->element_type_->get_backend(gogo);
+}
- space = fold_convert(TREE_TYPE(values_field), space);
+// Return the backend representation of the length.
- if (bad_index != NULL_TREE && bad_index != boolean_false_node)
- {
- tree crash = Gogo::runtime_error(RUNTIME_ERROR_MAKE_SLICE_OUT_OF_BOUNDS,
- location);
- space = build2(COMPOUND_EXPR, TREE_TYPE(space),
- build3(COND_EXPR, void_type_node,
- bad_index, crash, NULL_TREE),
- space);
- }
+Bexpression*
+Array_type::get_backend_length(Gogo* gogo)
+{
+ return tree_to_expr(this->get_length_tree(gogo));
+}
- tree constructor = gogo->slice_constructor(type_tree, space, length_tree,
- capacity_tree);
+// Finish backend representation of the array.
- if (value == NULL_TREE)
+void
+Array_type::finish_backend_element(Gogo* gogo)
+{
+ Type* et = this->array_type()->element_type();
+ et->get_backend(gogo);
+ if (this->is_slice_type())
{
- // The array contents are zero initialized.
- return constructor;
+ // This relies on the fact that we always use the same
+ // structure for a pointer to any given type.
+ Type* pet = Type::make_pointer_type(et);
+ pet->get_backend(gogo);
}
-
- // The elements must be initialized.
-
- tree max = fold_build2_loc(location, MINUS_EXPR, TREE_TYPE(count_field),
- capacity_tree,
- fold_convert_loc(location, TREE_TYPE(count_field),
- integer_one_node));
-
- tree array_type = build_array_type(element_type_tree,
- build_index_type(max));
-
- tree value_pointer = fold_convert_loc(location,
- build_pointer_type(array_type),
- space);
-
- tree range = build2(RANGE_EXPR, sizetype, size_zero_node, max);
- tree space_init = build_constructor_single(array_type, range, value);
-
- return build2(COMPOUND_EXPR, TREE_TYPE(space),
- build2(MODIFY_EXPR, void_type_node,
- build_fold_indirect_ref(value_pointer),
- space_init),
- constructor);
}
// Return a tree for a pointer to the values in ARRAY.
{
// Open array.
tree field = TYPE_FIELDS(TREE_TYPE(array));
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)),
+ go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)),
"__values") == 0);
ret = fold_build3(COMPONENT_REF, TREE_TYPE(field), array, field,
NULL_TREE);
// This is an open array. We need to read the length field.
tree type = TREE_TYPE(array);
- gcc_assert(TREE_CODE(type) == RECORD_TYPE);
+ go_assert(TREE_CODE(type) == RECORD_TYPE);
tree field = DECL_CHAIN(TYPE_FIELDS(type));
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)), "__count") == 0);
+ go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)), "__count") == 0);
tree ret = build3(COMPONENT_REF, TREE_TYPE(field), array, field, NULL_TREE);
if (TREE_CONSTANT(array))
Array_type::capacity_tree(Gogo* gogo, tree array)
{
if (this->length_ != NULL)
- return omit_one_operand(sizetype, this->get_length_tree(gogo), array);
+ return omit_one_operand(integer_type_node, this->get_length_tree(gogo),
+ array);
// This is an open array. We need to read the capacity field.
tree type = TREE_TYPE(array);
- gcc_assert(TREE_CODE(type) == RECORD_TYPE);
+ go_assert(TREE_CODE(type) == RECORD_TYPE);
tree field = DECL_CHAIN(DECL_CHAIN(TYPE_FIELDS(type)));
- gcc_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)), "__capacity") == 0);
+ go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(field)), "__capacity") == 0);
return build3(COMPONENT_REF, TREE_TYPE(field), array, field, NULL_TREE);
}
Type* uintptr_type = Type::lookup_integer_type("uintptr");
Struct_type* sf =
- Type::make_builtin_struct_type(3,
+ Type::make_builtin_struct_type(4,
"", tdt,
"elem", ptdt,
+ "slice", ptdt,
"len", uintptr_type);
ret = Type::make_builtin_named_type("ArrayType", sf);
Expression*
Array_type::array_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* atdt = Array_type::make_array_type_descriptor_type();
vals->reserve(3);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "commonType");
+ go_assert(p->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_ARRAY,
name, NULL, true));
++p;
- gcc_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->element_type_, bloc));
++p;
- gcc_assert(p->field_name() == "len");
+ go_assert(p->is_field_name("slice"));
+ Type* slice_type = Type::make_array_type(this->element_type_, NULL);
+ vals->push_back(Expression::make_type_descriptor(slice_type, bloc));
+
+ ++p;
+ go_assert(p->is_field_name("len"));
vals->push_back(Expression::make_cast(p->type(), this->length_, bloc));
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
return Expression::make_struct_composite_literal(atdt, vals, bloc);
}
Expression*
Array_type::slice_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* stdt = Array_type::make_slice_type_descriptor_type();
vals->reserve(2);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "commonType");
+ go_assert(p->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_SLICE,
name, NULL, true));
++p;
- gcc_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->element_type_, bloc));
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
return Expression::make_struct_composite_literal(stdt, vals, bloc);
}
bool
Map_type::do_verify()
{
- if (this->key_type_->struct_type() != NULL
- || this->key_type_->array_type() != NULL)
- {
- error_at(this->location_, "invalid map key type");
- return false;
- }
+ // The runtime support uses "map[void]void".
+ if (!this->key_type_->is_comparable() && !this->key_type_->is_void_type())
+ error_at(this->location_, "invalid map key type");
return true;
}
+ 2);
}
-// Check that a call to the builtin make function is valid. For a map
-// the optional argument is the number of spaces to preallocate for
-// values.
-
-bool
-Map_type::do_check_make_expression(Expression_list* args,
- source_location location)
-{
- if (args != NULL && !args->empty())
- {
- if (!Type::check_int_value(args->front(), _("bad size when making map"),
- location))
- return false;
- else if (args->size() > 1)
- {
- error_at(location, "too many arguments when making map");
- return false;
- }
- }
- return true;
-}
-
-// Get a tree for a map type. A map type is represented as a pointer
-// to a struct. The struct is __go_map in libgo/map.h.
+// Get the backend representation for a map type. A map type is
+// represented as a pointer to a struct. The struct is __go_map in
+// libgo/map.h.
-tree
-Map_type::do_get_tree(Gogo* gogo)
+Btype*
+Map_type::do_get_backend(Gogo* gogo)
{
- static tree type_tree;
- if (type_tree == NULL_TREE)
+ static Btype* backend_map_type;
+ if (backend_map_type == NULL)
{
- tree struct_type = make_node(RECORD_TYPE);
-
- tree map_descriptor_type = gogo->map_descriptor_type();
- tree const_map_descriptor_type =
- build_qualified_type(map_descriptor_type, TYPE_QUAL_CONST);
- tree name = get_identifier("__descriptor");
- tree field = build_decl(BUILTINS_LOCATION, FIELD_DECL, name,
- build_pointer_type(const_map_descriptor_type));
- DECL_CONTEXT(field) = struct_type;
- TYPE_FIELDS(struct_type) = field;
- tree last_field = field;
-
- name = get_identifier("__element_count");
- field = build_decl(BUILTINS_LOCATION, FIELD_DECL, name, sizetype);
- DECL_CONTEXT(field) = struct_type;
- DECL_CHAIN(last_field) = field;
- last_field = field;
-
- name = get_identifier("__bucket_count");
- field = build_decl(BUILTINS_LOCATION, FIELD_DECL, name, sizetype);
- DECL_CONTEXT(field) = struct_type;
- DECL_CHAIN(last_field) = field;
- last_field = field;
-
- name = get_identifier("__buckets");
- field = build_decl(BUILTINS_LOCATION, FIELD_DECL, name,
- build_pointer_type(ptr_type_node));
- DECL_CONTEXT(field) = struct_type;
- DECL_CHAIN(last_field) = field;
-
- layout_type(struct_type);
+ std::vector<Backend::Btyped_identifier> bfields(4);
- // Give the struct a name for better debugging info.
- name = get_identifier("__go_map");
- tree type_decl = build_decl(BUILTINS_LOCATION, TYPE_DECL, name,
- struct_type);
- DECL_ARTIFICIAL(type_decl) = 1;
- TYPE_NAME(struct_type) = type_decl;
- go_preserve_from_gc(type_decl);
- rest_of_decl_compilation(type_decl, 1, 0);
+ Location bloc = Linemap::predeclared_location();
- type_tree = build_pointer_type(struct_type);
- go_preserve_from_gc(type_tree);
- }
-
- return type_tree;
-}
-
-// Initialize a map.
-
-tree
-Map_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- if (is_clear)
- return NULL;
- return fold_convert(type_tree, null_pointer_node);
-}
+ Type* pdt = Type::make_type_descriptor_ptr_type();
+ bfields[0].name = "__descriptor";
+ bfields[0].btype = pdt->get_backend(gogo);
+ bfields[0].location = bloc;
-// Return an expression for a newly allocated map.
+ Type* uintptr_type = Type::lookup_integer_type("uintptr");
+ bfields[1].name = "__element_count";
+ bfields[1].btype = uintptr_type->get_backend(gogo);
+ bfields[1].location = bloc;
-tree
-Map_type::do_make_expression_tree(Translate_context* context,
- Expression_list* args,
- source_location location)
-{
- tree bad_index = NULL_TREE;
+ bfields[2].name = "__bucket_count";
+ bfields[2].btype = bfields[1].btype;
+ bfields[2].location = bloc;
- tree expr_tree;
- if (args == NULL || args->empty())
- expr_tree = size_zero_node;
- else
- {
- expr_tree = args->front()->get_tree(context);
- if (expr_tree == error_mark_node)
- return error_mark_node;
- if (!DECL_P(expr_tree))
- expr_tree = save_expr(expr_tree);
- if (!INTEGRAL_TYPE_P(TREE_TYPE(expr_tree)))
- expr_tree = convert_to_integer(sizetype, expr_tree);
- bad_index = Expression::check_bounds(expr_tree, sizetype, bad_index,
- location);
- }
-
- tree map_type = this->get_tree(context->gogo());
-
- static tree new_map_fndecl;
- tree ret = Gogo::call_builtin(&new_map_fndecl,
- location,
- "__go_new_map",
- 2,
- map_type,
- TREE_TYPE(TYPE_FIELDS(TREE_TYPE(map_type))),
- context->gogo()->map_descriptor(this),
- sizetype,
- expr_tree);
- if (ret == error_mark_node)
- return error_mark_node;
- // This can panic if the capacity is out of range.
- TREE_NOTHROW(new_map_fndecl) = 0;
+ Btype* bvt = gogo->backend()->void_type();
+ Btype* bpvt = gogo->backend()->pointer_type(bvt);
+ Btype* bppvt = gogo->backend()->pointer_type(bpvt);
+ bfields[3].name = "__buckets";
+ bfields[3].btype = bppvt;
+ bfields[3].location = bloc;
- if (bad_index == NULL_TREE)
- return ret;
- else
- {
- tree crash = Gogo::runtime_error(RUNTIME_ERROR_MAKE_MAP_OUT_OF_BOUNDS,
- location);
- return build2(COMPOUND_EXPR, TREE_TYPE(ret),
- build3(COND_EXPR, void_type_node,
- bad_index, crash, NULL_TREE),
- ret);
+ Btype *bt = gogo->backend()->struct_type(bfields);
+ bt = gogo->backend()->named_type("__go_map", bt, bloc);
+ backend_map_type = gogo->backend()->pointer_type(bt);
}
+ return backend_map_type;
}
// The type of a map type descriptor.
Expression*
Map_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* mtdt = Map_type::make_map_type_descriptor_type();
vals->reserve(3);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "commonType");
+ go_assert(p->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_MAP,
name, NULL, true));
++p;
- gcc_assert(p->field_name() == "key");
+ go_assert(p->is_field_name("key"));
vals->push_back(Expression::make_type_descriptor(this->key_type_, bloc));
++p;
- gcc_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->val_type_, bloc));
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
return Expression::make_struct_composite_literal(mtdt, vals, bloc);
}
+// A mapping from map types to map descriptors.
+
+Map_type::Map_descriptors Map_type::map_descriptors;
+
+// Build a map descriptor for this type. Return a pointer to it.
+
+tree
+Map_type::map_descriptor_pointer(Gogo* gogo, Location location)
+{
+ Bvariable* bvar = this->map_descriptor(gogo);
+ tree var_tree = var_to_tree(bvar);
+ if (var_tree == error_mark_node)
+ return error_mark_node;
+ return build_fold_addr_expr_loc(location.gcc_location(), var_tree);
+}
+
+// Build a map descriptor for this type.
+
+Bvariable*
+Map_type::map_descriptor(Gogo* gogo)
+{
+ std::pair<Map_type*, Bvariable*> val(this, NULL);
+ std::pair<Map_type::Map_descriptors::iterator, bool> ins =
+ Map_type::map_descriptors.insert(val);
+ if (!ins.second)
+ return ins.first->second;
+
+ Type* key_type = this->key_type_;
+ Type* val_type = this->val_type_;
+
+ // The map entry type is a struct with three fields. Build that
+ // struct so that we can get the offsets of the key and value within
+ // a map entry. The first field should technically be a pointer to
+ // this type itself, but since we only care about field offsets we
+ // just use pointer to bool.
+ Type* pbool = Type::make_pointer_type(Type::make_boolean_type());
+ Struct_type* map_entry_type =
+ Type::make_builtin_struct_type(3,
+ "__next", pbool,
+ "__key", key_type,
+ "__val", val_type);
+
+ Type* map_descriptor_type = Map_type::make_map_descriptor_type();
+
+ const Struct_field_list* fields =
+ map_descriptor_type->struct_type()->fields();
+
+ Expression_list* vals = new Expression_list();
+ vals->reserve(4);
+
+ Location bloc = Linemap::predeclared_location();
+
+ Struct_field_list::const_iterator p = fields->begin();
+
+ go_assert(p->is_field_name("__map_descriptor"));
+ vals->push_back(Expression::make_type_descriptor(this, bloc));
+
+ ++p;
+ go_assert(p->is_field_name("__entry_size"));
+ Expression::Type_info type_info = Expression::TYPE_INFO_SIZE;
+ vals->push_back(Expression::make_type_info(map_entry_type, type_info));
+
+ Struct_field_list::const_iterator pf = map_entry_type->fields()->begin();
+ ++pf;
+ go_assert(pf->is_field_name("__key"));
+
+ ++p;
+ go_assert(p->is_field_name("__key_offset"));
+ vals->push_back(Expression::make_struct_field_offset(map_entry_type, &*pf));
+
+ ++pf;
+ go_assert(pf->is_field_name("__val"));
+
+ ++p;
+ go_assert(p->is_field_name("__val_offset"));
+ vals->push_back(Expression::make_struct_field_offset(map_entry_type, &*pf));
+
+ ++p;
+ go_assert(p == fields->end());
+
+ Expression* initializer =
+ Expression::make_struct_composite_literal(map_descriptor_type, vals, bloc);
+
+ std::string mangled_name = "__go_map_" + this->mangled_name(gogo);
+ Btype* map_descriptor_btype = map_descriptor_type->get_backend(gogo);
+ Bvariable* bvar = gogo->backend()->immutable_struct(mangled_name, true,
+ map_descriptor_btype,
+ bloc);
+
+ Translate_context context(gogo, NULL, NULL, NULL);
+ context.set_is_const();
+ Bexpression* binitializer = tree_to_expr(initializer->get_tree(&context));
+
+ gogo->backend()->immutable_struct_set_init(bvar, mangled_name, true,
+ map_descriptor_btype, bloc,
+ binitializer);
+
+ ins.first->second = bvar;
+ return bvar;
+}
+
+// Build the type of a map descriptor. This must match the struct
+// __go_map_descriptor in libgo/runtime/map.h.
+
+Type*
+Map_type::make_map_descriptor_type()
+{
+ static Type* ret;
+ if (ret == NULL)
+ {
+ Type* ptdt = Type::make_type_descriptor_ptr_type();
+ Type* uintptr_type = Type::lookup_integer_type("uintptr");
+ Struct_type* sf =
+ Type::make_builtin_struct_type(4,
+ "__map_descriptor", ptdt,
+ "__entry_size", uintptr_type,
+ "__key_offset", uintptr_type,
+ "__val_offset", uintptr_type);
+ ret = Type::make_builtin_named_type("__go_map_descriptor", sf);
+ }
+ return ret;
+}
+
// Reflection string for a map.
void
{
ret->append("map[");
this->append_reflection(this->key_type_, gogo, ret);
- ret->append("] ");
+ ret->append("]");
this->append_reflection(this->val_type_, gogo, ret);
}
// Make a map type.
Map_type*
-Type::make_map_type(Type* key_type, Type* val_type, source_location location)
+Type::make_map_type(Type* key_type, Type* val_type, Location location)
{
return new Map_type(key_type, val_type, location);
}
&& this->may_receive_ == t->may_receive_);
}
-// Check whether the parameters for a call to the builtin function
-// make are OK for a channel. A channel can take an optional single
-// parameter which is the buffer size.
-
-bool
-Channel_type::do_check_make_expression(Expression_list* args,
- source_location location)
-{
- if (args != NULL && !args->empty())
- {
- if (!Type::check_int_value(args->front(),
- _("bad buffer size when making channel"),
- location))
- return false;
- else if (args->size() > 1)
- {
- error_at(location, "too many arguments when making channel");
- return false;
- }
- }
- return true;
-}
-
// Return the tree for a channel type. A channel is a pointer to a
// __go_channel struct. The __go_channel struct is defined in
// libgo/runtime/channel.h.
-tree
-Channel_type::do_get_tree(Gogo*)
-{
- static tree type_tree;
- if (type_tree == NULL_TREE)
- {
- tree ret = make_node(RECORD_TYPE);
- TYPE_NAME(ret) = get_identifier("__go_channel");
- TYPE_STUB_DECL(ret) = build_decl(BUILTINS_LOCATION, TYPE_DECL, NULL_TREE,
- ret);
- type_tree = build_pointer_type(ret);
- go_preserve_from_gc(type_tree);
- }
- return type_tree;
-}
-
-// Initialize a channel variable.
-
-tree
-Channel_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- if (is_clear)
- return NULL;
- return fold_convert(type_tree, null_pointer_node);
-}
-
-// Handle the builtin function make for a channel.
-
-tree
-Channel_type::do_make_expression_tree(Translate_context* context,
- Expression_list* args,
- source_location location)
+Btype*
+Channel_type::do_get_backend(Gogo* gogo)
{
- Gogo* gogo = context->gogo();
- tree channel_type = this->get_tree(gogo);
-
- tree element_tree = this->element_type_->get_tree(gogo);
- tree element_size_tree = size_in_bytes(element_tree);
-
- tree bad_index = NULL_TREE;
-
- tree expr_tree;
- if (args == NULL || args->empty())
- expr_tree = size_zero_node;
- else
- {
- expr_tree = args->front()->get_tree(context);
- if (expr_tree == error_mark_node)
- return error_mark_node;
- if (!DECL_P(expr_tree))
- expr_tree = save_expr(expr_tree);
- if (!INTEGRAL_TYPE_P(TREE_TYPE(expr_tree)))
- expr_tree = convert_to_integer(sizetype, expr_tree);
- bad_index = Expression::check_bounds(expr_tree, sizetype, bad_index,
- location);
- }
-
- static tree new_channel_fndecl;
- tree ret = Gogo::call_builtin(&new_channel_fndecl,
- location,
- "__go_new_channel",
- 2,
- channel_type,
- sizetype,
- element_size_tree,
- sizetype,
- expr_tree);
- if (ret == error_mark_node)
- return error_mark_node;
- // This can panic if the capacity is out of range.
- TREE_NOTHROW(new_channel_fndecl) = 0;
-
- if (bad_index == NULL_TREE)
- return ret;
- else
+ static Btype* backend_channel_type;
+ if (backend_channel_type == NULL)
{
- tree crash = Gogo::runtime_error(RUNTIME_ERROR_MAKE_CHAN_OUT_OF_BOUNDS,
- location);
- return build2(COMPOUND_EXPR, TREE_TYPE(ret),
- build3(COND_EXPR, void_type_node,
- bad_index, crash, NULL_TREE),
- ret);
+ std::vector<Backend::Btyped_identifier> bfields;
+ Btype* bt = gogo->backend()->struct_type(bfields);
+ bt = gogo->backend()->named_type("__go_channel", bt,
+ Linemap::predeclared_location());
+ backend_channel_type = gogo->backend()->pointer_type(bt);
}
+ return backend_channel_type;
}
// Build a type descriptor for a channel type.
Expression*
Channel_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* ctdt = Channel_type::make_chan_type_descriptor_type();
vals->reserve(3);
Struct_field_list::const_iterator p = fields->begin();
- gcc_assert(p->field_name() == "commonType");
+ go_assert(p->is_field_name("commonType"));
vals->push_back(this->type_descriptor_constructor(gogo,
RUNTIME_TYPE_KIND_CHAN,
name, NULL, true));
++p;
- gcc_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->element_type_, bloc));
++p;
- gcc_assert(p->field_name() == "dir");
+ go_assert(p->is_field_name("dir"));
// These bits must match the ones in libgo/runtime/go-type.h.
int val = 0;
if (this->may_receive_)
mpz_clear(iv);
++p;
- gcc_assert(p == fields->end());
+ go_assert(p == fields->end());
return Expression::make_struct_composite_literal(ctdt, vals, bloc);
}
int
Interface_type::do_traverse(Traverse* traverse)
{
- if (this->methods_ == NULL)
+ Typed_identifier_list* methods = (this->methods_are_finalized_
+ ? this->all_methods_
+ : this->parse_methods_);
+ if (methods == NULL)
return TRAVERSE_CONTINUE;
- return this->methods_->traverse(traverse);
+ return methods->traverse(traverse);
}
// Finalize the methods. This handles interface inheritance.
void
Interface_type::finalize_methods()
{
- if (this->methods_ == NULL)
+ if (this->methods_are_finalized_)
+ return;
+ this->methods_are_finalized_ = true;
+ if (this->parse_methods_ == NULL)
return;
- bool is_recursive = false;
- size_t from = 0;
- size_t to = 0;
- while (from < this->methods_->size())
+
+ this->all_methods_ = new Typed_identifier_list();
+ this->all_methods_->reserve(this->parse_methods_->size());
+ Typed_identifier_list inherit;
+ for (Typed_identifier_list::const_iterator pm =
+ this->parse_methods_->begin();
+ pm != this->parse_methods_->end();
+ ++pm)
{
- const Typed_identifier* p = &this->methods_->at(from);
- if (!p->name().empty())
- {
- size_t i;
- for (i = 0; i < to; ++i)
- {
- if (this->methods_->at(i).name() == p->name())
- {
- error_at(p->location(), "duplicate method %qs",
- Gogo::message_name(p->name()).c_str());
- break;
- }
- }
- if (i == to)
- {
- if (from != to)
- this->methods_->set(to, *p);
- ++to;
- }
- ++from;
- continue;
- }
- Interface_type* it = p->type()->interface_type();
+ const Typed_identifier* p = &*pm;
+ if (p->name().empty())
+ inherit.push_back(*p);
+ else if (this->find_method(p->name()) == NULL)
+ this->all_methods_->push_back(*p);
+ else
+ error_at(p->location(), "duplicate method %qs",
+ Gogo::message_name(p->name()).c_str());
+ }
+
+ std::vector<Named_type*> seen;
+ seen.reserve(inherit.size());
+ bool issued_recursive_error = false;
+ while (!inherit.empty())
+ {
+ Type* t = inherit.back().type();
+ Location tl = inherit.back().location();
+ inherit.pop_back();
+
+ Interface_type* it = t->interface_type();
if (it == NULL)
{
- error_at(p->location(), "interface contains embedded non-interface");
- ++from;
+ if (!t->is_error())
+ error_at(tl, "interface contains embedded non-interface");
continue;
}
if (it == this)
{
- if (!is_recursive)
+ if (!issued_recursive_error)
{
- error_at(p->location(), "invalid recursive interface");
- is_recursive = true;
+ error_at(tl, "invalid recursive interface");
+ issued_recursive_error = true;
}
- ++from;
- continue;
- }
- const Typed_identifier_list* methods = it->methods();
- if (methods == NULL)
- {
- ++from;
continue;
}
- for (Typed_identifier_list::const_iterator q = methods->begin();
- q != methods->end();
- ++q)
+
+ Named_type* nt = t->named_type();
+ if (nt != NULL && it->parse_methods_ != NULL)
{
- if (q->name().empty())
+ std::vector<Named_type*>::const_iterator q;
+ for (q = seen.begin(); q != seen.end(); ++q)
{
- if (q->type() == p->type())
- error_at(p->location(), "interface inheritance loop");
- else
+ if (*q == nt)
{
- size_t i;
- for (i = from + 1; i < this->methods_->size(); ++i)
- {
- const Typed_identifier* r = &this->methods_->at(i);
- if (r->name().empty() && r->type() == q->type())
- {
- error_at(p->location(),
- "inherited interface listed twice");
- break;
- }
- }
- if (i == this->methods_->size())
- this->methods_->push_back(Typed_identifier(q->name(),
- q->type(),
- p->location()));
+ error_at(tl, "inherited interface loop");
+ break;
}
}
+ if (q != seen.end())
+ continue;
+ seen.push_back(nt);
+ }
+
+ const Typed_identifier_list* imethods = it->parse_methods_;
+ if (imethods == NULL)
+ continue;
+ for (Typed_identifier_list::const_iterator q = imethods->begin();
+ q != imethods->end();
+ ++q)
+ {
+ if (q->name().empty())
+ inherit.push_back(*q);
else if (this->find_method(q->name()) == NULL)
- this->methods_->push_back(Typed_identifier(q->name(), q->type(),
- p->location()));
+ this->all_methods_->push_back(Typed_identifier(q->name(),
+ q->type(), tl));
else
- {
- if (!is_recursive)
- error_at(p->location(), "inherited method %qs is ambiguous",
- Gogo::message_name(q->name()).c_str());
- }
+ error_at(tl, "inherited method %qs is ambiguous",
+ Gogo::message_name(q->name()).c_str());
}
- ++from;
- }
- if (to == 0)
- {
- delete this->methods_;
- this->methods_ = NULL;
}
+
+ if (!this->all_methods_->empty())
+ this->all_methods_->sort_by_name();
else
{
- this->methods_->resize(to);
- this->methods_->sort_by_name();
+ delete this->all_methods_;
+ this->all_methods_ = NULL;
}
}
const Typed_identifier*
Interface_type::find_method(const std::string& name) const
{
- if (this->methods_ == NULL)
+ go_assert(this->methods_are_finalized_);
+ if (this->all_methods_ == NULL)
return NULL;
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
+ for (Typed_identifier_list::const_iterator p = this->all_methods_->begin();
+ p != this->all_methods_->end();
++p)
if (p->name() == name)
return &*p;
size_t
Interface_type::method_index(const std::string& name) const
{
- gcc_assert(this->methods_ != NULL);
+ go_assert(this->methods_are_finalized_ && this->all_methods_ != NULL);
size_t ret = 0;
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
+ for (Typed_identifier_list::const_iterator p = this->all_methods_->begin();
+ p != this->all_methods_->end();
++p, ++ret)
if (p->name() == name)
return ret;
- gcc_unreachable();
+ go_unreachable();
}
// Return whether NAME is an unexported method, for better error
bool
Interface_type::is_unexported_method(Gogo* gogo, const std::string& name) const
{
- if (this->methods_ == NULL)
+ go_assert(this->methods_are_finalized_);
+ if (this->all_methods_ == NULL)
return false;
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
+ for (Typed_identifier_list::const_iterator p = this->all_methods_->begin();
+ p != this->all_methods_->end();
++p)
{
const std::string& method_name(p->name());
Interface_type::is_identical(const Interface_type* t,
bool errors_are_identical) const
{
+ go_assert(this->methods_are_finalized_ && t->methods_are_finalized_);
+
// We require the same methods with the same types. The methods
// have already been sorted.
- if (this->methods() == NULL || t->methods() == NULL)
- return this->methods() == t->methods();
+ if (this->all_methods_ == NULL || t->all_methods_ == NULL)
+ return this->all_methods_ == t->all_methods_;
+
+ if (this->assume_identical(this, t) || t->assume_identical(t, this))
+ return true;
+
+ Assume_identical* hold_ai = this->assume_identical_;
+ Assume_identical ai;
+ ai.t1 = this;
+ ai.t2 = t;
+ ai.next = hold_ai;
+ this->assume_identical_ = &ai;
- Typed_identifier_list::const_iterator p1 = this->methods()->begin();
- for (Typed_identifier_list::const_iterator p2 = t->methods()->begin();
- p2 != t->methods()->end();
- ++p1, ++p2)
+ Typed_identifier_list::const_iterator p1 = this->all_methods_->begin();
+ Typed_identifier_list::const_iterator p2;
+ for (p2 = t->all_methods_->begin(); p2 != t->all_methods_->end(); ++p1, ++p2)
{
- if (p1 == this->methods()->end())
- return false;
+ if (p1 == this->all_methods_->end())
+ break;
if (p1->name() != p2->name()
|| !Type::are_identical(p1->type(), p2->type(),
errors_are_identical, NULL))
- return false;
+ break;
}
- if (p1 != this->methods()->end())
- return false;
- return true;
+
+ this->assume_identical_ = hold_ai;
+
+ return p1 == this->all_methods_->end() && p2 == t->all_methods_->end();
+}
+
+// Return true if T1 and T2 are assumed to be identical during a type
+// comparison.
+
+bool
+Interface_type::assume_identical(const Interface_type* t1,
+ const Interface_type* t2) const
+{
+ for (Assume_identical* p = this->assume_identical_;
+ p != NULL;
+ p = p->next)
+ if ((p->t1 == t1 && p->t2 == t2) || (p->t1 == t2 && p->t2 == t1))
+ return true;
+ return false;
}
// Whether we can assign the interface type T to this type. The types
Interface_type::is_compatible_for_assign(const Interface_type* t,
std::string* reason) const
{
- if (this->methods() == NULL)
+ go_assert(this->methods_are_finalized_ && t->methods_are_finalized_);
+ if (this->all_methods_ == NULL)
return true;
- for (Typed_identifier_list::const_iterator p = this->methods()->begin();
- p != this->methods()->end();
+ for (Typed_identifier_list::const_iterator p = this->all_methods_->begin();
+ p != this->all_methods_->end();
++p)
{
const Typed_identifier* m = t->find_method(p->name());
// Hash code.
unsigned int
-Interface_type::do_hash_for_method(Gogo* gogo) const
+Interface_type::do_hash_for_method(Gogo*) const
{
+ go_assert(this->methods_are_finalized_);
unsigned int ret = 0;
- if (this->methods_ != NULL)
+ if (this->all_methods_ != NULL)
{
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
+ for (Typed_identifier_list::const_iterator p =
+ this->all_methods_->begin();
+ p != this->all_methods_->end();
++p)
{
ret = Type::hash_string(p->name(), ret);
- ret += p->type()->hash_for_method(gogo);
+ // We don't use the method type in the hash, to avoid
+ // infinite recursion if an interface method uses a type
+ // which is an interface which inherits from the interface
+ // itself.
+ // type T interface { F() interface {T}}
ret <<= 1;
}
}
bool
Interface_type::implements_interface(const Type* t, std::string* reason) const
{
- if (this->methods_ == NULL)
+ go_assert(this->methods_are_finalized_);
+ if (this->all_methods_ == NULL)
return true;
bool is_pointer = false;
return false;
}
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
+ for (Typed_identifier_list::const_iterator p = this->all_methods_->begin();
+ p != this->all_methods_->end();
++p)
{
bool is_ambiguous = false;
Function_type *p_fn_type = p->type()->function_type();
Function_type* m_fn_type = m->type()->function_type();
- gcc_assert(p_fn_type != NULL && m_fn_type != NULL);
+ go_assert(p_fn_type != NULL && m_fn_type != NULL);
std::string subreason;
if (!p_fn_type->is_identical(m_fn_type, true, true, &subreason))
{
return true;
}
-// Return a tree for an interface type. An interface is a pointer to
-// a struct. The struct has three fields. The first field is a
-// pointer to the type descriptor for the dynamic type of the object.
-// The second field is a pointer to a table of methods for the
-// interface to be used with the object. The third field is the value
-// of the object itself.
+// Return the backend representation of the empty interface type. We
+// use the same struct for all empty interfaces.
-tree
-Interface_type::do_get_tree(Gogo* gogo)
+Btype*
+Interface_type::get_backend_empty_interface_type(Gogo* gogo)
{
- if (this->methods_ == NULL)
+ static Btype* empty_interface_type;
+ if (empty_interface_type == NULL)
{
- // 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);
- }
+ std::vector<Backend::Btyped_identifier> bfields(2);
+
+ Location bloc = Linemap::predeclared_location();
+
+ Type* pdt = Type::make_type_descriptor_ptr_type();
+ bfields[0].name = "__type_descriptor";
+ bfields[0].btype = pdt->get_backend(gogo);
+ bfields[0].location = bloc;
+
+ Type* vt = Type::make_pointer_type(Type::make_void_type());
+ bfields[1].name = "__object";
+ bfields[1].btype = vt->get_backend(gogo);
+ bfields[1].location = bloc;
- return this->fill_in_tree(gogo, make_node(RECORD_TYPE));
+ empty_interface_type = gogo->backend()->struct_type(bfields);
+ }
+ return empty_interface_type;
}
-// Fill in the tree for an interface type. This is used for named
-// interface types.
+// Return the fields of a non-empty interface type. This is not
+// declared in types.h so that types.h doesn't have to #include
+// backend.h.
-tree
-Interface_type::fill_in_tree(Gogo* gogo, tree type)
+static void
+get_backend_interface_fields(Gogo* gogo, Interface_type* type,
+ bool use_placeholder,
+ std::vector<Backend::Btyped_identifier>* bfields)
{
- gcc_assert(this->methods_ != NULL);
+ Location loc = type->location();
- // 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.
+ std::vector<Backend::Btyped_identifier> mfields(type->methods()->size() + 1);
- tree field_trees = NULL_TREE;
- tree* pp = &field_trees;
+ Type* pdt = Type::make_type_descriptor_ptr_type();
+ mfields[0].name = "__type_descriptor";
+ mfields[0].btype = pdt->get_backend(gogo);
+ mfields[0].location = loc;
- 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);
+ std::string last_name = "";
+ size_t i = 1;
+ for (Typed_identifier_list::const_iterator p = type->methods()->begin();
+ p != type->methods()->end();
+ ++p, ++i)
+ {
+ // The type of the method in Go only includes the parameters.
+ // The actual method also has a receiver, which is always a
+ // pointer. We need to add that pointer type here in order to
+ // generate the correct type for the backend.
+ Function_type* ft = p->type()->function_type();
+ go_assert(ft->receiver() == NULL);
+
+ const Typed_identifier_list* params = ft->parameters();
+ Typed_identifier_list* mparams = new Typed_identifier_list();
+ if (params != NULL)
+ mparams->reserve(params->size() + 1);
+ Type* vt = Type::make_pointer_type(Type::make_void_type());
+ mparams->push_back(Typed_identifier("", vt, ft->location()));
+ if (params != NULL)
+ {
+ for (Typed_identifier_list::const_iterator pp = params->begin();
+ pp != params->end();
+ ++pp)
+ mparams->push_back(*pp);
+ }
- name_tree = get_identifier("__object");
- tree field = build_decl(this->location_, FIELD_DECL, name_tree,
- ptr_type_node);
- DECL_CONTEXT(field) = type;
- *pp = field;
+ Typed_identifier_list* mresults = (ft->results() == NULL
+ ? NULL
+ : ft->results()->copy());
+ Function_type* mft = Type::make_function_type(NULL, mparams, mresults,
+ ft->location());
+
+ mfields[i].name = Gogo::unpack_hidden_name(p->name());
+ mfields[i].btype = (use_placeholder
+ ? mft->get_backend_placeholder(gogo)
+ : mft->get_backend(gogo));
+ mfields[i].location = loc;
+ // Sanity check: the names should be sorted.
+ go_assert(p->name() > last_name);
+ last_name = p->name();
+ }
- TYPE_FIELDS(type) = field_trees;
+ Btype* methods = gogo->backend()->struct_type(mfields);
- layout_type(type);
+ bfields->resize(2);
- // Build the type of the table of methods.
+ (*bfields)[0].name = "__methods";
+ (*bfields)[0].btype = gogo->backend()->pointer_type(methods);
+ (*bfields)[0].location = loc;
- tree method_table = make_node(RECORD_TYPE);
+ Type* vt = Type::make_pointer_type(Type::make_void_type());
+ (*bfields)[1].name = "__object";
+ (*bfields)[1].btype = vt->get_backend(gogo);
+ (*bfields)[1].location = Linemap::predeclared_location();
+}
- // The first field is a pointer to the type descriptor.
- 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);
- DECL_CONTEXT(field) = method_table;
- TYPE_FIELDS(method_table) = field;
+// Return a tree for an interface type. An interface is a pointer to
+// a struct. The struct has three fields. The first field is a
+// pointer to the type descriptor for the dynamic type of the object.
+// The second field is a pointer to a table of methods for the
+// interface to be used with the object. The third field is the value
+// of the object itself.
- std::string last_name = "";
- pp = &DECL_CHAIN(field);
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
- ++p)
+Btype*
+Interface_type::do_get_backend(Gogo* gogo)
+{
+ if (this->is_empty())
+ return Interface_type::get_backend_empty_interface_type(gogo);
+ else
{
- std::string name = Gogo::unpack_hidden_name(p->name());
- name_tree = get_identifier_with_length(name.data(), name.length());
- tree field_type = p->type()->get_tree(gogo);
- if (field_type == error_mark_node)
- return error_mark_node;
- field = build_decl(this->location_, FIELD_DECL, name_tree, field_type);
- DECL_CONTEXT(field) = method_table;
- *pp = field;
- pp = &DECL_CHAIN(field);
- // Sanity check: the names should be sorted.
- gcc_assert(p->name() > last_name);
- last_name = p->name();
+ if (this->interface_btype_ != NULL)
+ return this->interface_btype_;
+ this->interface_btype_ =
+ gogo->backend()->placeholder_struct_type("", this->location_);
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_interface_fields(gogo, this, false, &bfields);
+ if (!gogo->backend()->set_placeholder_struct_type(this->interface_btype_,
+ bfields))
+ this->interface_btype_ = gogo->backend()->error_type();
+ return this->interface_btype_;
}
- layout_type(method_table);
-
- // 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);
-
- return type;
}
-// Initialization value.
+// Finish the backend representation of the methods.
-tree
-Interface_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
+void
+Interface_type::finish_backend_methods(Gogo* gogo)
{
- if (is_clear)
- return NULL;
-
- VEC(constructor_elt,gc)* init = VEC_alloc(constructor_elt, gc, 2);
- for (tree field = TYPE_FIELDS(type_tree);
- field != NULL_TREE;
- field = DECL_CHAIN(field))
+ if (!this->interface_type()->is_empty())
{
- constructor_elt* elt = VEC_quick_push(constructor_elt, init, NULL);
- elt->index = field;
- elt->value = fold_convert(TREE_TYPE(field), null_pointer_node);
+ const Typed_identifier_list* methods = this->methods();
+ if (methods != NULL)
+ {
+ for (Typed_identifier_list::const_iterator p = methods->begin();
+ p != methods->end();
+ ++p)
+ p->type()->get_backend(gogo);
+ }
}
-
- tree ret = build_constructor(type_tree, init);
- TREE_CONSTANT(ret) = 1;
- return ret;
}
// The type of an interface type descriptor.
Expression*
Interface_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
- source_location bloc = BUILTINS_LOCATION;
+ Location bloc = Linemap::predeclared_location();
Type* itdt = Interface_type::make_interface_type_descriptor_type();
ivals->reserve(2);
Struct_field_list::const_iterator pif = ifields->begin();
- gcc_assert(pif->field_name() == "commonType");
- ivals->push_back(this->type_descriptor_constructor(gogo,
- RUNTIME_TYPE_KIND_INTERFACE,
- name, NULL, true));
+ go_assert(pif->is_field_name("commonType"));
+ const int rt = RUNTIME_TYPE_KIND_INTERFACE;
+ ivals->push_back(this->type_descriptor_constructor(gogo, rt, name, NULL,
+ true));
++pif;
- gcc_assert(pif->field_name() == "methods");
+ go_assert(pif->is_field_name("methods"));
Expression_list* methods = new Expression_list();
- if (this->methods_ != NULL && !this->methods_->empty())
+ if (this->all_methods_ != NULL)
{
Type* elemtype = pif->type()->array_type()->element_type();
- methods->reserve(this->methods_->size());
- for (Typed_identifier_list::const_iterator pm = this->methods_->begin();
- pm != this->methods_->end();
+ methods->reserve(this->all_methods_->size());
+ for (Typed_identifier_list::const_iterator pm =
+ this->all_methods_->begin();
+ pm != this->all_methods_->end();
++pm)
{
const Struct_field_list* mfields = elemtype->struct_type()->fields();
mvals->reserve(3);
Struct_field_list::const_iterator pmf = mfields->begin();
- gcc_assert(pmf->field_name() == "name");
+ go_assert(pmf->is_field_name("name"));
std::string s = Gogo::unpack_hidden_name(pm->name());
Expression* e = Expression::make_string(s, bloc);
mvals->push_back(Expression::make_unary(OPERATOR_AND, e, bloc));
++pmf;
- gcc_assert(pmf->field_name() == "pkgPath");
+ go_assert(pmf->is_field_name("pkgPath"));
if (!Gogo::is_hidden_name(pm->name()))
mvals->push_back(Expression::make_nil(bloc));
else
}
++pmf;
- gcc_assert(pmf->field_name() == "typ");
+ go_assert(pmf->is_field_name("typ"));
mvals->push_back(Expression::make_type_descriptor(pm->type(), bloc));
++pmf;
- gcc_assert(pmf == mfields->end());
+ go_assert(pmf == mfields->end());
e = Expression::make_struct_composite_literal(elemtype, mvals,
bloc);
methods, bloc));
++pif;
- gcc_assert(pif == ifields->end());
+ go_assert(pif == ifields->end());
return Expression::make_struct_composite_literal(itdt, ivals, bloc);
}
Interface_type::do_reflection(Gogo* gogo, std::string* ret) const
{
ret->append("interface {");
- if (this->methods_ != NULL)
+ const Typed_identifier_list* methods = this->parse_methods_;
+ if (methods != NULL)
{
- for (Typed_identifier_list::const_iterator p = this->methods_->begin();
- p != this->methods_->end();
+ ret->push_back(' ');
+ for (Typed_identifier_list::const_iterator p = methods->begin();
+ p != methods->end();
++p)
{
- if (p != this->methods_->begin())
- ret->append(";");
- ret->push_back(' ');
- ret->append(Gogo::unpack_hidden_name(p->name()));
- std::string sub = p->type()->reflection(gogo);
- gcc_assert(sub.compare(0, 4, "func") == 0);
- sub = sub.substr(4);
- ret->append(sub);
+ if (p != methods->begin())
+ ret->append("; ");
+ if (p->name().empty())
+ this->append_reflection(p->type(), gogo, ret);
+ else
+ {
+ if (!Gogo::is_hidden_name(p->name()))
+ ret->append(p->name());
+ else
+ {
+ // This matches what the gc compiler does.
+ std::string prefix = Gogo::hidden_name_prefix(p->name());
+ ret->append(prefix.substr(prefix.find('.') + 1));
+ ret->push_back('.');
+ ret->append(Gogo::unpack_hidden_name(p->name()));
+ }
+ std::string sub = p->type()->reflection(gogo);
+ go_assert(sub.compare(0, 4, "func") == 0);
+ sub = sub.substr(4);
+ ret->append(sub);
+ }
}
+ ret->push_back(' ');
}
- ret->append(" }");
+ ret->append("}");
}
// Mangled name.
void
Interface_type::do_mangled_name(Gogo* gogo, std::string* ret) const
{
+ go_assert(this->methods_are_finalized_);
+
ret->push_back('I');
- const Typed_identifier_list* methods = this->methods_;
- if (methods != NULL)
+ const Typed_identifier_list* methods = this->all_methods_;
+ if (methods != NULL && !this->seen_)
{
+ this->seen_ = true;
for (Typed_identifier_list::const_iterator p = methods->begin();
p != methods->end();
++p)
{
- std::string n = Gogo::unpack_hidden_name(p->name());
- char buf[20];
- snprintf(buf, sizeof buf, "%u_",
- static_cast<unsigned int>(n.length()));
- ret->append(buf);
- ret->append(n);
+ if (!p->name().empty())
+ {
+ std::string n = Gogo::unpack_hidden_name(p->name());
+ char buf[20];
+ snprintf(buf, sizeof buf, "%u_",
+ static_cast<unsigned int>(n.length()));
+ ret->append(buf);
+ ret->append(n);
+ }
this->append_mangled_name(p->type(), gogo, ret);
}
+ this->seen_ = false;
}
ret->push_back('e');
{
exp->write_c_string("interface { ");
- const Typed_identifier_list* methods = this->methods_;
+ const Typed_identifier_list* methods = this->parse_methods_;
if (methods != NULL)
{
for (Typed_identifier_list::const_iterator pm = methods->begin();
pm != methods->end();
++pm)
{
- exp->write_string(pm->name());
- exp->write_c_string(" (");
-
- const Function_type* fntype = pm->type()->function_type();
-
- bool first = true;
- const Typed_identifier_list* parameters = fntype->parameters();
- if (parameters != NULL)
+ if (pm->name().empty())
{
- bool is_varargs = fntype->is_varargs();
- for (Typed_identifier_list::const_iterator pp =
- parameters->begin();
- pp != parameters->end();
- ++pp)
- {
- if (first)
- first = false;
- else
- exp->write_c_string(", ");
- if (!is_varargs || pp + 1 != parameters->end())
- exp->write_type(pp->type());
- else
- {
- exp->write_c_string("...");
- Type *pptype = pp->type();
- exp->write_type(pptype->array_type()->element_type());
- }
- }
+ exp->write_c_string("? ");
+ exp->write_type(pm->type());
}
+ else
+ {
+ exp->write_string(pm->name());
+ exp->write_c_string(" (");
- exp->write_c_string(")");
+ const Function_type* fntype = pm->type()->function_type();
- const Typed_identifier_list* results = fntype->results();
- if (results != NULL)
- {
- exp->write_c_string(" ");
- if (results->size() == 1)
- exp->write_type(results->begin()->type());
- else
+ bool first = true;
+ const Typed_identifier_list* parameters = fntype->parameters();
+ if (parameters != NULL)
{
- first = true;
- exp->write_c_string("(");
- for (Typed_identifier_list::const_iterator p =
- results->begin();
- p != results->end();
- ++p)
+ bool is_varargs = fntype->is_varargs();
+ for (Typed_identifier_list::const_iterator pp =
+ parameters->begin();
+ pp != parameters->end();
+ ++pp)
{
if (first)
first = false;
else
exp->write_c_string(", ");
- exp->write_type(p->type());
+ exp->write_name(pp->name());
+ exp->write_c_string(" ");
+ if (!is_varargs || pp + 1 != parameters->end())
+ exp->write_type(pp->type());
+ else
+ {
+ exp->write_c_string("...");
+ Type *pptype = pp->type();
+ exp->write_type(pptype->array_type()->element_type());
+ }
+ }
+ }
+
+ exp->write_c_string(")");
+
+ const Typed_identifier_list* results = fntype->results();
+ if (results != NULL)
+ {
+ exp->write_c_string(" ");
+ if (results->size() == 1 && results->begin()->name().empty())
+ exp->write_type(results->begin()->type());
+ else
+ {
+ first = true;
+ exp->write_c_string("(");
+ for (Typed_identifier_list::const_iterator p =
+ results->begin();
+ p != results->end();
+ ++p)
+ {
+ if (first)
+ first = false;
+ else
+ exp->write_c_string(", ");
+ exp->write_name(p->name());
+ exp->write_c_string(" ");
+ exp->write_type(p->type());
+ }
+ exp->write_c_string(")");
}
- exp->write_c_string(")");
}
}
while (imp->peek_char() != '}')
{
std::string name = imp->read_identifier();
+
+ if (name == "?")
+ {
+ imp->require_c_string(" ");
+ Type* t = imp->read_type();
+ methods->push_back(Typed_identifier("", t, imp->location()));
+ imp->require_c_string("; ");
+ continue;
+ }
+
imp->require_c_string(" (");
Typed_identifier_list* parameters;
parameters = new Typed_identifier_list;
while (true)
{
+ std::string name = imp->read_name();
+ imp->require_c_string(" ");
+
if (imp->match_c_string("..."))
{
imp->advance(3);
Type* ptype = imp->read_type();
if (is_varargs)
ptype = Type::make_array_type(ptype, NULL);
- parameters->push_back(Typed_identifier(Import::import_marker,
- ptype, imp->location()));
+ parameters->push_back(Typed_identifier(name, ptype,
+ imp->location()));
if (imp->peek_char() != ',')
break;
- gcc_assert(!is_varargs);
+ go_assert(!is_varargs);
imp->require_c_string(", ");
}
}
if (imp->peek_char() != '(')
{
Type* rtype = imp->read_type();
- results->push_back(Typed_identifier(Import::import_marker,
- rtype, imp->location()));
+ results->push_back(Typed_identifier("", rtype, imp->location()));
}
else
{
imp->advance(1);
while (true)
{
+ std::string name = imp->read_name();
+ imp->require_c_string(" ");
Type* rtype = imp->read_type();
- results->push_back(Typed_identifier(Import::import_marker,
- rtype, imp->location()));
+ results->push_back(Typed_identifier(name, rtype,
+ imp->location()));
if (imp->peek_char() != ',')
break;
imp->require_c_string(", ");
Interface_type*
Type::make_interface_type(Typed_identifier_list* methods,
- source_location location)
+ Location location)
{
return new Interface_type(methods, location);
}
+// Make an empty interface type.
+
+Interface_type*
+Type::make_empty_interface_type(Location location)
+{
+ Interface_type* ret = new Interface_type(NULL, location);
+ ret->finalize_methods();
+ return ret;
+}
+
// Class Method.
// Bind a method to an object.
Expression*
-Method::bind_method(Expression* expr, source_location location) const
+Method::bind_method(Expression* expr, Location location) const
{
if (this->stub_ == NULL)
{
// the child class.
return this->do_bind_method(expr, location);
}
-
- Expression* func = Expression::make_func_reference(this->stub_, NULL,
- location);
- return Expression::make_bound_method(expr, func, location);
+ return Expression::make_bound_method(expr, this->stub_, location);
}
// Return the named object associated with a method. This may only be
else if (this->named_object_->is_function_declaration())
return this->named_object_->func_declaration_value()->type();
else
- gcc_unreachable();
+ go_unreachable();
}
// Return the location of the method receiver.
-source_location
+Location
Named_method::do_receiver_location() const
{
return this->do_type()->receiver()->location();
// Bind a method to an object.
Expression*
-Named_method::do_bind_method(Expression* expr, source_location location) const
+Named_method::do_bind_method(Expression* expr, Location location) const
{
- Expression* func = Expression::make_func_reference(this->named_object_, NULL,
- location);
- Bound_method_expression* bme = Expression::make_bound_method(expr, func,
+ Named_object* no = this->named_object_;
+ Bound_method_expression* bme = Expression::make_bound_method(expr, no,
location);
// If this is not a local method, and it does not use a stub, then
// the real method expects a different type. We need to cast the
if (this->depth() > 0 && !this->needs_stub_method())
{
Function_type* ftype = this->do_type();
- gcc_assert(ftype->is_method());
+ go_assert(ftype->is_method());
Type* frtype = ftype->receiver()->type();
bme->set_first_argument_type(frtype);
}
Expression*
Interface_method::do_bind_method(Expression* expr,
- source_location location) const
+ Location location) const
{
return Expression::make_interface_field_reference(expr, this->name_,
location);
return this->named_object_->message_name();
}
+// Whether this is an alias. There are currently only two aliases so
+// we just recognize them by name.
+
+bool
+Named_type::is_alias() const
+{
+ if (!this->is_builtin())
+ return false;
+ const std::string& name(this->name());
+ return name == "byte" || name == "rune";
+}
+
// Return the base type for this type. We have to be careful about
// circular type definitions, which are invalid but may be seen here.
Type*
Named_type::named_base()
{
- if (this->seen_ > 0)
+ if (this->seen_)
return this;
- ++this->seen_;
+ this->seen_ = true;
Type* ret = this->type_->base();
- --this->seen_;
+ this->seen_ = false;
return ret;
}
const Type*
Named_type::named_base() const
{
- if (this->seen_ > 0)
+ if (this->seen_)
return this;
- ++this->seen_;
+ this->seen_ = true;
const Type* ret = this->type_->base();
- --this->seen_;
+ this->seen_ = false;
return ret;
}
bool
Named_type::is_named_error_type() const
{
- if (this->seen_ > 0)
+ if (this->seen_)
return false;
- ++this->seen_;
+ this->seen_ = true;
bool ret = this->type_->is_error_type();
- --this->seen_;
+ this->seen_ = false;
+ return ret;
+}
+
+// Whether this type is comparable. We have to be careful about
+// circular type definitions.
+
+bool
+Named_type::named_type_is_comparable(std::string* reason) const
+{
+ if (this->seen_)
+ return false;
+ this->seen_ = true;
+ bool ret = Type::are_compatible_for_comparison(true, this->type_,
+ this->type_, reason);
+ this->seen_ = false;
return ret;
}
Named_object*
Named_type::add_method_declaration(const std::string& name, Package* package,
Function_type* type,
- source_location location)
+ Location location)
{
if (this->local_methods_ == NULL)
this->local_methods_ = new Bindings(NULL);
Named_type::interface_method_table(Gogo* gogo, const Interface_type* interface,
bool is_pointer)
{
- gcc_assert(!interface->is_empty());
+ go_assert(!interface->is_empty());
Interface_method_tables** pimt = (is_pointer
? &this->interface_method_tables_
if (ins.second)
{
// This is a new entry in the hash table.
- gcc_assert(ins.first->second == NULL_TREE);
+ go_assert(ins.first->second == NULL_TREE);
ins.first->second = gogo->interface_method_table_for_type(interface,
this,
is_pointer);
tree decl = ins.first->second;
if (decl == error_mark_node)
return error_mark_node;
- gcc_assert(decl != NULL_TREE && TREE_CODE(decl) == VAR_DECL);
+ go_assert(decl != NULL_TREE && TREE_CODE(decl) == VAR_DECL);
return build_fold_addr_expr(decl);
}
bool
Named_type::named_type_has_hidden_fields(std::string* reason) const
{
- if (this->seen_ > 0)
+ if (this->seen_)
return false;
- ++this->seen_;
+ this->seen_ = true;
bool ret = this->type_->has_hidden_fields(this, reason);
- --this->seen_;
+ this->seen_ = false;
return ret;
}
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.
if (type->points_to() != NULL
- || type->is_open_array_type()
+ || type->is_slice_type()
|| type->function_type() != NULL
|| type->map_type() != NULL
|| type->channel_type() != NULL)
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_NAMED:
+ case Type::TYPE_FORWARD:
+ go_assert(saw_errors());
+ 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:
+ default:
+ go_unreachable();
+ }
+ }
+
return TRAVERSE_CONTINUE;
}
if (this->local_methods_ != NULL)
{
Struct_type* st = this->type_->struct_type();
- Interface_type* it = this->type_->interface_type();
- bool found_dup = false;
- if (st != NULL || it != NULL)
+ if (st != NULL)
{
for (Bindings::const_declarations_iterator p =
this->local_methods_->begin_declarations();
error_at(p->second->location(),
"method %qs redeclares struct field name",
Gogo::message_name(name).c_str());
- found_dup = true;
- }
- if (it != NULL && it->find_method(name) != NULL)
- {
- error_at(p->second->location(),
- "method %qs redeclares interface method name",
- Gogo::message_name(name).c_str());
- found_dup = true;
}
}
}
- if (found_dup)
- return false;
- }
-
- // If this is a struct, then if any of the fields of the struct
- // themselves have 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);
- }
}
return true;
bool
Named_type::do_has_pointer() const
{
- if (this->seen_ > 0)
+ if (this->seen_)
return false;
- ++this->seen_;
+ this->seen_ = true;
bool ret = this->type_->has_pointer();
- --this->seen_;
+ this->seen_ = false;
+ return ret;
+}
+
+// Return whether comparisons for this type can use the identity
+// function.
+
+bool
+Named_type::do_compare_is_identity(Gogo* gogo) const
+{
+ // We don't use this->seen_ here because compare_is_identity may
+ // call base() later, and that will mess up if seen_ is set here.
+ if (this->seen_in_compare_is_identity_)
+ return false;
+ this->seen_in_compare_is_identity_ = true;
+ bool ret = this->type_->compare_is_identity(gogo);
+ this->seen_in_compare_is_identity_ = false;
return ret;
}
unsigned int
Named_type::do_hash_for_method(Gogo* gogo) const
{
+ if (this->is_alias())
+ return this->type_->named_type()->do_hash_for_method(gogo);
+
const std::string& name(this->named_object()->name());
unsigned int ret = Type::hash_string(name, 0);
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_)
- return error_mark_node;
+ if (this->is_error_ || this->is_converted_)
+ return;
- // Go permits types to refer to themselves in various ways. Break
- // the recursion here.
- tree t;
- switch (this->type_->forwarded()->classification())
- {
- case TYPE_ERROR:
- return error_mark_node;
+ 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.
+ Btype* bt = this->named_btype_;
+ Type* base = this->type_->base();
+ switch (base->classification())
+ {
case TYPE_VOID:
case TYPE_BOOLEAN:
case TYPE_INTEGER:
case TYPE_COMPLEX:
case TYPE_STRING:
case TYPE_NIL:
- // These types can not refer to themselves.
+ break;
+
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_);
- if (t == error_mark_node)
- return error_mark_node;
- // Build a copy to set TYPE_NAME.
- 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)
- {
- 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->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_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);
+ // The size of these types is already correct. We don't worry
+ // about filling them in until later, when we also track
+ // circular references.
break;
case TYPE_STRUCT:
- // If there are structs which must be converted first, do them.
- if (this->seen_ == 0)
+ {
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_struct_fields(gogo, base->struct_type()->fields(),
+ true, &bfields);
+ if (!gogo->backend()->set_placeholder_struct_type(bt, bfields))
+ bt = gogo->backend()->error_type();
+ }
+ break;
+
+ case TYPE_ARRAY:
+ // Slice types were completed in create_placeholder.
+ if (!base->is_slice_type())
{
- ++this->seen_;
- this->type_->struct_type()->convert_prerequisites(gogo);
- --this->seen_;
+ Btype* bet = base->array_type()->get_backend_element(gogo, true);
+ Bexpression* blen = base->array_type()->get_backend_length(gogo);
+ if (!gogo->backend()->set_placeholder_array_type(bt, bet, blen))
+ bt = gogo->backend()->error_type();
}
+ break;
- if (this->named_tree_ != NULL_TREE)
- return this->named_tree_;
+ case TYPE_INTERFACE:
+ // Interface types were completed in create_placeholder.
+ break;
- 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;
- }
+ case TYPE_ERROR:
+ return;
+
+ default:
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
+ go_unreachable();
+ }
+
+ this->named_btype_ = bt;
+ this->is_converted_ = true;
+ this->is_placeholder_ = false;
+}
+
+// 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_)
+ this->named_btype_ = gogo->backend()->error_type();
+
+ if (this->named_btype_ != NULL)
+ 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();
+ Btype* bt;
+ bool set_name = true;
+ switch (base->classification())
+ {
+ case TYPE_ERROR:
+ this->is_error_ = true;
+ this->named_btype_ = gogo->backend()->error_type();
+ return;
+
+ case TYPE_VOID:
+ case TYPE_BOOLEAN:
+ case TYPE_INTEGER:
+ case TYPE_FLOAT:
+ case TYPE_COMPLEX:
+ case TYPE_STRING:
+ case TYPE_NIL:
+ // These are simple basic types, we can just create them
+ // directly.
+ bt = Type::get_named_base_btype(gogo, base);
+ break;
+
+ case TYPE_MAP:
+ case TYPE_CHANNEL:
+ // All maps and channels have the same backend representation.
+ bt = Type::get_named_base_btype(gogo, base);
+ break;
+
+ case TYPE_FUNCTION:
+ case TYPE_POINTER:
+ {
+ bool for_function = base->classification() == TYPE_FUNCTION;
+ bt = gogo->backend()->placeholder_pointer_type(this->name(),
+ this->location_,
+ for_function);
+ set_name = false;
+ }
+ break;
+
+ case TYPE_STRUCT:
+ bt = gogo->backend()->placeholder_struct_type(this->name(),
+ this->location_);
+ this->is_placeholder_ = true;
+ set_name = false;
break;
case TYPE_ARRAY:
- if (!this->is_open_array_type())
- t = Type::get_named_type_tree(gogo, this->type_);
+ if (base->is_slice_type())
+ bt = gogo->backend()->placeholder_struct_type(this->name(),
+ this->location_);
else
{
- if (this->named_tree_ != NULL_TREE)
- return this->named_tree_;
- t = gogo->slice_type_tree(void_type_node);
- this->named_tree_ = t;
- t = this->type_->array_type()->fill_in_tree(gogo, t);
+ bt = gogo->backend()->placeholder_array_type(this->name(),
+ this->location_);
+ this->is_placeholder_ = true;
}
- if (t == error_mark_node)
- return error_mark_node;
- t = build_variant_type_copy(t);
+ set_name = false;
break;
case TYPE_INTERFACE:
- if (this->type_->interface_type()->is_empty())
- {
- t = Type::get_named_type_tree(gogo, this->type_);
- if (t == error_mark_node)
- return error_mark_node;
- t = build_variant_type_copy(t);
- }
+ if (base->interface_type()->is_empty())
+ bt = Interface_type::get_backend_empty_interface_type(gogo);
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;
- }
+ bt = gogo->backend()->placeholder_struct_type(this->name(),
+ this->location_);
+ set_name = false;
}
break;
+ default:
+ case TYPE_SINK:
+ case TYPE_CALL_MULTIPLE_RESULT:
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;
+ go_unreachable();
+ }
+
+ if (set_name)
+ bt = gogo->backend()->named_type(this->name(), bt, this->location_);
+
+ this->named_btype_ = bt;
+
+ if (base->is_slice_type())
+ {
+ // We do not record slices as dependencies of other types,
+ // because we can fill them in completely here with the final
+ // size.
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_slice_fields(gogo, base->array_type(), true, &bfields);
+ if (!gogo->backend()->set_placeholder_struct_type(bt, bfields))
+ this->named_btype_ = gogo->backend()->error_type();
+ }
+ else if (base->interface_type() != NULL
+ && !base->interface_type()->is_empty())
+ {
+ // We do not record interfaces as dependencies of other types,
+ // because we can fill them in completely here with the final
+ // size.
+ std::vector<Backend::Btyped_identifier> bfields;
+ get_backend_interface_fields(gogo, base->interface_type(), true,
+ &bfields);
+ if (!gogo->backend()->set_placeholder_struct_type(bt, bfields))
+ this->named_btype_ = gogo->backend()->error_type();
+ }
+}
+
+// Get a tree for a named type.
+
+Btype*
+Named_type::do_get_backend(Gogo* gogo)
+{
+ if (this->is_error_)
+ return gogo->backend()->error_type();
+
+ Btype* bt = this->named_btype_;
+
+ if (!gogo->named_types_are_converted())
+ {
+ // We have not completed converting named types. NAMED_BTYPE_
+ // is a placeholder and we shouldn't do anything further.
+ if (bt != NULL)
+ return bt;
+
+ // 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);
+ bt = this->named_btype_;
+ go_assert(bt != NULL);
+ return bt;
+ }
+
+ // We are not converting types. This should only be called if the
+ // type has already been converted.
+ if (!this->is_converted_)
+ {
+ go_assert(saw_errors());
+ return gogo->backend()->error_type();
+ }
+
+ go_assert(bt != NULL);
+
+ // Complete the tree.
+ Type* base = this->type_->base();
+ Btype* bt1;
+ switch (base->classification())
+ {
+ case TYPE_ERROR:
+ return gogo->backend()->error_type();
+
+ 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:
+ return bt;
+
+ case TYPE_STRUCT:
+ if (!this->seen_in_get_backend_)
+ {
+ this->seen_in_get_backend_ = true;
+ base->struct_type()->finish_backend_fields(gogo);
+ this->seen_in_get_backend_ = false;
+ }
+ return bt;
+
+ case TYPE_ARRAY:
+ if (!this->seen_in_get_backend_)
+ {
+ this->seen_in_get_backend_ = true;
+ base->array_type()->finish_backend_element(gogo);
+ this->seen_in_get_backend_ = false;
+ }
+ return bt;
+
+ case TYPE_INTERFACE:
+ if (!this->seen_in_get_backend_)
+ {
+ this->seen_in_get_backend_ = true;
+ base->interface_type()->finish_backend_methods(gogo);
+ this->seen_in_get_backend_ = false;
+ }
+ return bt;
+
+ case TYPE_FUNCTION:
+ // Don't build a circular data structure. GENERIC can't handle
+ // it.
+ if (this->seen_in_get_backend_)
+ {
+ this->is_circular_ = true;
+ return gogo->backend()->circular_pointer_type(bt, true);
+ }
+ this->seen_in_get_backend_ = true;
+ bt1 = Type::get_named_base_btype(gogo, base);
+ this->seen_in_get_backend_ = false;
+ if (this->is_circular_)
+ bt1 = gogo->backend()->circular_pointer_type(bt, true);
+ if (!gogo->backend()->set_placeholder_function_type(bt, bt1))
+ bt = gogo->backend()->error_type();
+ return bt;
+
+ case TYPE_POINTER:
+ // Don't build a circular data structure. GENERIC can't handle
+ // it.
+ if (this->seen_in_get_backend_)
+ {
+ this->is_circular_ = true;
+ return gogo->backend()->circular_pointer_type(bt, false);
+ }
+ this->seen_in_get_backend_ = true;
+ bt1 = Type::get_named_base_btype(gogo, base);
+ this->seen_in_get_backend_ = false;
+ if (this->is_circular_)
+ bt1 = gogo->backend()->circular_pointer_type(bt, false);
+ if (!gogo->backend()->set_placeholder_pointer_type(bt, bt1))
+ bt = gogo->backend()->error_type();
+ return bt;
default:
case TYPE_SINK:
case TYPE_CALL_MULTIPLE_RESULT:
- gcc_unreachable();
+ case TYPE_NAMED:
+ case TYPE_FORWARD:
+ go_unreachable();
}
- tree id = this->named_object_->get_id(gogo);
- tree decl = build_decl(this->location_, TYPE_DECL, id, t);
- TYPE_NAME(t) = decl;
-
- return t;
+ go_unreachable();
}
// Build a type descriptor for a named type.
Expression*
Named_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
+ if (name == NULL && this->is_alias())
+ return this->type_->type_descriptor(gogo, this->type_);
+
// If NAME is not NULL, then we don't really want the type
// descriptor for this type; we want the descriptor for the
// underlying type, giving it the name NAME.
void
Named_type::do_reflection(Gogo* gogo, std::string* ret) const
{
- if (this->location() != BUILTINS_LOCATION)
+ if (this->is_alias())
+ {
+ this->append_reflection(this->type_, gogo, ret);
+ return;
+ }
+ if (!this->is_builtin())
{
const Package* package = this->named_object_->package();
if (package != NULL)
void
Named_type::do_mangled_name(Gogo* gogo, std::string* ret) const
{
+ if (this->is_alias())
+ {
+ this->append_mangled_name(this->type_, gogo, ret);
+ return;
+ }
Named_object* no = this->named_object_;
std::string name;
- if (this->location() == BUILTINS_LOCATION)
- gcc_assert(this->in_function_ == NULL);
+ if (this->is_builtin())
+ go_assert(this->in_function_ == NULL);
else
{
const std::string& unique_prefix(no->package() == NULL
imp->require_c_string("type ");
Type *type = imp->read_type();
*ptype = type->named_type();
- gcc_assert(*ptype != NULL);
+ go_assert(*ptype != NULL);
imp->require_c_string(";\n");
}
Named_type*
Type::make_named_type(Named_object* named_object, Type* type,
- source_location location)
+ Location location)
{
return new Named_type(named_object, type, location);
}
// all required stubs.
void
-Type::finalize_methods(Gogo* gogo, const Type* type, source_location location,
+Type::finalize_methods(Gogo* gogo, const Type* type, Location location,
Methods** all_methods)
{
*all_methods = NULL;
++pm)
{
Function_type* fntype = pm->type()->function_type();
- gcc_assert(fntype != NULL && !fntype->is_method());
+ if (fntype == NULL)
+ {
+ // This is an error, but it should be reported elsewhere
+ // when we look at the methods for IT.
+ continue;
+ }
+ go_assert(!fntype->is_method());
fntype = fntype->copy_with_receiver(const_cast<Type*>(type));
Method* m = new Interface_method(pm->name(), pm->location(), fntype,
field_indexes, depth);
void
Type::build_stub_methods(Gogo* gogo, const Type* type, const Methods* methods,
- source_location location)
+ Location location)
{
if (methods == NULL)
return;
Type* receiver_type = const_cast<Type*>(type);
if (!m->is_value_method())
receiver_type = Type::make_pointer_type(receiver_type);
- source_location receiver_location = m->receiver_location();
+ Location receiver_location = m->receiver_location();
Typed_identifier* receiver = new Typed_identifier(buf, receiver_type,
receiver_location);
const char* receiver_name,
const Typed_identifier_list* params,
bool is_varargs,
- source_location location)
+ Location location)
{
Named_object* receiver_object = gogo->lookup(receiver_name, NULL);
- gcc_assert(receiver_object != NULL);
+ go_assert(receiver_object != NULL);
Expression* expr = Expression::make_var_reference(receiver_object, location);
expr = Type::apply_field_indexes(expr, method->field_indexes(), location);
++p)
{
Named_object* param = gogo->lookup(p->name(), NULL);
- gcc_assert(param != NULL);
+ go_assert(param != NULL);
Expression* param_ref = Expression::make_var_reference(param,
location);
arguments->push_back(param_ref);
}
Expression* func = method->bind_method(expr, location);
- gcc_assert(func != NULL);
+ go_assert(func != NULL);
Call_expression* call = Expression::make_call(func, arguments, is_varargs,
location);
+ call->set_hidden_fields_are_ok();
size_t count = call->result_count();
if (count == 0)
- gogo->add_statement(Statement::make_statement(call));
+ gogo->add_statement(Statement::make_statement(call, true));
else
{
Expression_list* retvals = new Expression_list();
for (size_t i = 0; i < count; ++i)
retvals->push_back(Expression::make_call_result(call, i));
}
- const Function* function = gogo->current_function()->func_value();
- const Typed_identifier_list* results = function->type()->results();
- Statement* retstat = Statement::make_return_statement(results, retvals,
- location);
+ Return_statement* retstat = Statement::make_return_statement(retvals,
+ location);
+
+ // We can return values with hidden fields from a stub. This is
+ // necessary if the method is itself hidden.
+ retstat->set_hidden_fields_are_ok();
+
gogo->add_statement(retstat);
}
}
Expression*
Type::apply_field_indexes(Expression* expr,
const Method::Field_indexes* field_indexes,
- source_location location)
+ Location location)
{
if (field_indexes == NULL)
return expr;
expr = Type::apply_field_indexes(expr, field_indexes->next, location);
Struct_type* stype = expr->type()->deref()->struct_type();
- gcc_assert(stype != NULL
+ go_assert(stype != NULL
&& field_indexes->field_index < stype->field_count());
if (expr->type()->struct_type() == NULL)
{
- gcc_assert(expr->type()->points_to() != NULL);
+ go_assert(expr->type()->points_to() != NULL);
expr = Expression::make_unary(OPERATOR_MULT, expr, location);
- gcc_assert(expr->type()->struct_type() == stype);
+ go_assert(expr->type()->struct_type() == stype);
}
return Expression::make_field_reference(expr, field_indexes->field_index,
location);
else if (no->is_function_declaration())
fntype = no->func_declaration_value()->type();
else
- gcc_unreachable();
+ go_unreachable();
return fntype->receiver()->type()->points_to() != NULL;
}
Expression*
Type::bind_field_or_method(Gogo* gogo, const Type* type, Expression* expr,
const std::string& name,
- source_location location)
+ Location location)
{
if (type->deref()->is_error_type())
return Expression::make_error(location);
- const Named_type* nt = type->named_type();
- if (nt == NULL)
- nt = type->deref()->named_type();
+ const Named_type* nt = type->deref()->named_type();
const Struct_type* st = type->deref()->struct_type();
- const Interface_type* it = type->deref()->interface_type();
+ const Interface_type* it = type->interface_type();
// If this is a pointer to a pointer, then it is possible that the
// pointed-to type has methods.
+ bool dereferenced = false;
if (nt == NULL
&& st == NULL
&& it == NULL
{
expr = Expression::make_unary(OPERATOR_MULT, expr, location);
type = type->points_to();
+ if (type->deref()->is_error_type())
+ return Expression::make_error(location);
nt = type->points_to()->named_type();
st = type->points_to()->struct_type();
- it = type->points_to()->interface_type();
+ dereferenced = true;
}
bool receiver_can_be_pointer = (expr->type()->points_to() != NULL
Expression* ret;
if (!is_method)
{
- gcc_assert(st != NULL);
+ go_assert(st != NULL);
if (type->struct_type() == NULL)
{
- gcc_assert(type->points_to() != NULL);
+ go_assert(type->points_to() != NULL);
expr = Expression::make_unary(OPERATOR_MULT, expr,
location);
- gcc_assert(expr->type()->struct_type() == st);
+ go_assert(expr->type()->struct_type() == st);
}
ret = st->field_reference(expr, name, location);
}
else if (st != NULL)
m = st->method_function(name, NULL);
else
- gcc_unreachable();
- gcc_assert(m != NULL);
+ go_unreachable();
+ go_assert(m != NULL);
+ if (dereferenced && m->is_value_method())
+ {
+ error_at(location,
+ "calling value method requires explicit dereference");
+ return Expression::make_error(location);
+ }
if (!m->is_value_method() && expr->type()->points_to() == NULL)
expr = Expression::make_unary(OPERATOR_AND, expr, location);
ret = m->bind_method(expr, location);
}
- gcc_assert(ret != NULL);
+ go_assert(ret != NULL);
return ret;
}
else
{
if (!ambig1.empty())
error_at(location, "%qs is ambiguous via %qs and %qs",
- Gogo::message_name(name).c_str(),
- Gogo::message_name(ambig1).c_str(),
- Gogo::message_name(ambig2).c_str());
+ Gogo::message_name(name).c_str(), ambig1.c_str(),
+ ambig2.c_str());
else if (found_pointer_method)
error_at(location, "method requires a pointer");
else if (nt == NULL && st == NULL && it == NULL)
}
// Interface types can have methods.
- const Interface_type* it = type->deref()->interface_type();
+ const Interface_type* it = type->interface_type();
if (it != NULL && it->find_method(name) != NULL)
{
*is_method = true;
pf != fields->end();
++pf)
{
- if (pf->field_name() == name)
+ if (pf->is_field_name(name))
{
*is_method = false;
if (nt != NULL)
Named_type* fnt = pf->type()->named_type();
if (fnt == NULL)
fnt = pf->type()->deref()->named_type();
- gcc_assert(fnt != NULL);
+ go_assert(fnt != NULL);
int sublevel = level == NULL ? 1 : *level + 1;
bool sub_is_method;
// pass the ambiguity back to the caller.
if (found_level == 0 || sublevel <= found_level)
{
- found_ambig1 = pf->field_name() + '.' + subambig1;
- found_ambig2 = pf->field_name() + '.' + subambig2;
+ found_ambig1 = (Gogo::message_name(pf->field_name())
+ + '.' + subambig1);
+ found_ambig2 = (Gogo::message_name(pf->field_name())
+ + '.' + subambig2);
found_level = sublevel;
}
}
else if (found_ambig1.empty())
{
// We found an ambiguity.
- gcc_assert(found_parent != NULL);
- found_ambig1 = found_parent->field_name();
- found_ambig2 = pf->field_name();
+ go_assert(found_parent != NULL);
+ found_ambig1 = Gogo::message_name(found_parent->field_name());
+ found_ambig2 = Gogo::message_name(pf->field_name());
}
else
{
return false;
else if (!found_ambig1.empty())
{
- gcc_assert(!found_ambig1.empty());
+ go_assert(!found_ambig1.empty());
ambig1->assign(found_ambig1);
ambig2->assign(found_ambig2);
if (level != NULL)
}
}
- type = type->deref();
-
const Interface_type* it = type->interface_type();
if (it != NULL && it->is_unexported_method(gogo, name))
return true;
+ type = type->deref();
+
const Struct_type* st = type->struct_type();
if (st != NULL && st->is_unexported_local_field(gogo, name))
return true;
: Type(TYPE_FORWARD),
named_object_(named_object->resolve()), warned_(false)
{
- gcc_assert(this->named_object_->is_unknown()
+ go_assert(this->named_object_->is_unknown()
|| this->named_object_->is_type_declaration());
}
Named_object*
Forward_declaration_type::add_method_declaration(const std::string& name,
+ Package* package,
Function_type* type,
- source_location location)
+ Location location)
{
Named_object* no = this->named_object();
if (no->is_unknown())
no->declare_as_type();
Type_declaration* td = no->type_declaration_value();
- return td->add_method_declaration(name, type, location);
+ return td->add_method_declaration(name, package, type, location);
}
// Traversal.
return TRAVERSE_CONTINUE;
}
-// Get a tree for the type.
+// Get the backend representation for the type.
-tree
-Forward_declaration_type::do_get_tree(Gogo* gogo)
+Btype*
+Forward_declaration_type::do_get_backend(Gogo* gogo)
{
if (this->is_defined())
- return Type::get_named_type_tree(gogo, this->real_type());
+ return Type::get_named_base_btype(gogo, this->real_type());
if (this->warned_)
- return error_mark_node;
+ return gogo->backend()->error_type();
// We represent an undefined type as a struct with no fields. That
- // should work fine for the middle-end, since the same case can
- // arise in C.
- Named_object* no = this->named_object();
- tree type_tree = make_node(RECORD_TYPE);
- tree id = no->get_id(gogo);
- tree decl = build_decl(no->location(), TYPE_DECL, id, type_tree);
- TYPE_NAME(type_tree) = decl;
- layout_type(type_tree);
- return type_tree;
+ // should work fine for the backend, since the same case can arise
+ // in C.
+ std::vector<Backend::Btyped_identifier> fields;
+ Btype* bt = gogo->backend()->struct_type(fields);
+ return gogo->backend()->named_type(this->name(), bt,
+ this->named_object()->location());
}
// Build a type descriptor for a forwarded type.
Expression*
Forward_declaration_type::do_type_descriptor(Gogo* gogo, Named_type* name)
{
+ Location ploc = Linemap::predeclared_location();
if (!this->is_defined())
- return Expression::make_nil(BUILTINS_LOCATION);
+ return Expression::make_error(ploc);
else
{
Type* t = this->real_type();
if (name != NULL)
return this->named_type_descriptor(gogo, t, name);
else
- return Expression::make_type_descriptor(t, BUILTINS_LOCATION);
+ return Expression::make_type_descriptor(t, ploc);
}
}
Forward_declaration_type::do_export(Export*) const
{
// If there is a base type, that should be exported instead of this.
- gcc_assert(!this->is_defined());
+ go_assert(!this->is_defined());
// We don't output anything.
}
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