// Class Type.
Type::Type(Type_classification classification)
- : classification_(classification), btype_(NULL),
- type_descriptor_decl_(NULL_TREE)
+ : classification_(classification), btype_(NULL), type_descriptor_var_(NULL)
{
}
// 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;
}
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 T1 may be compared with a value of
+// type T2. IS_EQUALITY_OP is true for == or !=, false for <, etc.
+
+bool
+Type::are_compatible_for_comparison(bool is_equality_op, const Type *t1,
+ const Type *t2, std::string *reason)
+{
+ if (t1 != t2
+ && !Type::are_assignable(t1, t2, NULL)
+ && !Type::are_assignable(t2, t1, NULL))
+ {
+ if (reason != NULL)
+ *reason = "incompatible types in binary expression";
+ return false;
+ }
+
+ 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()->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
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))
bool
Type::are_assignable(const Type* lhs, const Type* rhs, std::string* reason)
{
- return Type::are_assignable_check_hidden(lhs, rhs, true, reason);
+ return Type::are_assignable_check_hidden(lhs, rhs, false, reason);
}
// Like are_assignable but don't check for hidden fields.
{
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
}
// A string may be converted to []byte or []int.
- if (rhs->is_string_type()
- && lhs->is_open_array_type()
- && lhs->named_type() == NULL)
+ if (rhs->is_string_type() && lhs->is_slice_type())
{
const Type* e = lhs->array_type()->element_type()->forwarded();
if (e->integer_type() != NULL
return h;
}
-// Default check for the expression passed to make. Any type which
-// may be used with make implements its own version of this.
-
-bool
-Type::do_check_make_expression(Expression_list*, source_location)
-{
- go_unreachable();
-}
-
-// Return whether an expression has an integer value. Report an error
-// if not. This is used when handling calls to the predeclared make
-// function.
-
-bool
-Type::check_int_value(Expression* e, const char* errmsg,
- source_location location)
-{
- if (e->type()->integer_type() != NULL)
- return true;
-
- // Check for a floating point constant with integer value.
- mpfr_t fval;
- mpfr_init(fval);
-
- Type* dummy;
- if (e->float_constant_value(fval, &dummy) && mpfr_integer_p(fval))
- {
- mpz_t ival;
- mpz_init(ival);
-
- bool ok = false;
-
- mpfr_clear_overflow();
- mpfr_clear_erangeflag();
- mpfr_get_z(ival, fval, GMP_RNDN);
- if (!mpfr_overflow_p()
- && !mpfr_erangeflag_p()
- && mpz_sgn(ival) >= 0)
- {
- 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);
- }
- mpz_clear(ival);
-
- if (ok)
- {
- mpfr_clear(fval);
- return true;
- }
- }
-
- mpfr_clear(fval);
-
- error_at(location, "%s", errmsg);
- return false;
-}
-
// A hash table mapping unnamed types to the backend representation of
// those types.
return this->btype_;
}
-// Return a tree representing a zero initialization for this type.
+// Return a pointer to the type descriptor for this type.
tree
-Type::get_init_tree(Gogo* gogo, bool is_clear)
+Type::type_descriptor_pointer(Gogo* gogo, Location location)
{
- tree type_tree = type_to_tree(this->get_backend(gogo));
- if (type_tree == error_mark_node)
+ Type* t = this->forwarded();
+ if (t->type_descriptor_var_ == NULL)
+ {
+ 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 this->do_get_init_tree(gogo, type_tree, is_clear);
+ return build_fold_addr_expr_loc(location.gcc_location(), var_tree);
}
-// Any type which supports the builtin make function must implement
-// this.
+// A mapping from unnamed types to type descriptor variables.
-tree
-Type::do_make_expression_tree(Translate_context*, Expression_list*,
- source_location)
+Type::Type_descriptor_vars Type::type_descriptor_vars;
+
+// Build the type descriptor for this type.
+
+void
+Type::make_type_descriptor_var(Gogo* gogo)
{
- go_unreachable();
+ go_assert(this->type_descriptor_var_ == NULL);
+
+ 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;
+ }
+
+ std::string var_name = this->type_descriptor_var_name(gogo, nt);
+
+ // Build the contents of the type descriptor.
+ Expression* initializer = this->do_type_descriptor(gogo, NULL);
+
+ 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);
}
-// Return a pointer to the type descriptor for this type.
+// 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::type_descriptor_pointer(Gogo* gogo)
+std::string
+Type::type_descriptor_var_name(Gogo* gogo, Named_type* nt)
{
- Type* t = this->forwarded();
- if (t->type_descriptor_decl_ == NULL_TREE)
+ 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
{
- Expression* e = t->do_type_descriptor(gogo, NULL);
- gogo->build_type_descriptor_decl(t, e, &t->type_descriptor_decl_);
- go_assert(t->type_descriptor_decl_ != NULL_TREE
- && (t->type_descriptor_decl_ == error_mark_node
- || DECL_P(t->type_descriptor_decl_)));
+ 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, '.');
+ }
}
- if (t->type_descriptor_decl_ == error_mark_node)
- return error_mark_node;
- return build_fold_addr_expr(t->type_descriptor_decl_);
+ ret.append(no->name());
+ return ret;
+}
+
+// Return true if this type descriptor is defined in a different
+// package. If this returns true it sets *PACKAGE to the package.
+
+bool
+Type::type_descriptor_defined_elsewhere(Named_type* nt,
+ const Package** package)
+{
+ if (nt != NULL)
+ {
+ 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;
+ }
+ }
+ 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.
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++)
{
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);
Named_type* ret = no->type_value();
Type::named_builtin_types.push_back(ret);
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));
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())
+ {
+ 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;
+ }
- case Type::TYPE_NAMED:
- case Type::TYPE_FORWARD:
- go_unreachable();
- default:
- go_unreachable();
+ 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)
+ base_name = gogo->pack_hidden_name(this->mangled_name(gogo), 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.
+
+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();
+
+ 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
// of kind RUNTIME_TYPE_KIND named NAME.
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();
- go_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;
- go_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;
- go_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;
- go_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;
- go_assert(p->field_name() == "hash");
+ go_assert(p->is_field_name("hash"));
mpz_set_ui(iv, this->hash_for_method(gogo));
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;
- go_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;
- go_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;
- go_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;
- go_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;
- go_assert(p->field_name() == "ptrToThis");
+ go_assert(p->is_field_name("ptrToThis"));
if (name == NULL)
vals->push_back(Expression::make_nil(bloc));
else
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();
- go_assert(p->field_name() == "name");
+ go_assert(p->is_field_name("name"));
++p;
- go_assert(p->field_name() == "pkgPath");
+ go_assert(p->is_field_name("pkgPath"));
if (name == NULL)
{
}
++p;
- go_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));
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();
- go_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;
- go_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
Type* nonmethod_type = mtype->copy_without_receiver();
++p;
- go_assert(p->field_name() == "mtyp");
+ go_assert(p->is_field_name("mtyp"));
vals->push_back(Expression::make_type_descriptor(nonmethod_type, bloc));
++p;
- go_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;
- go_assert(p->field_name() == "tfn");
+ go_assert(p->is_field_name("tfn"));
vals->push_back(Expression::make_func_reference(no, NULL, bloc));
++p;
return ret;
}
+// Return whether the backend size of the type is known.
+
+bool
+Type::is_backend_type_size_known(Gogo* gogo) const
+{
+ 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:
+ return this->named_type()->is_named_backend_type_size_known();
+
+ case TYPE_FORWARD:
+ {
+ const 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)
+{
+ Btype* btype = this->get_backend(gogo);
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ size_t size = gogo->backend()->type_size(btype);
+ *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)
+{
+ Btype* btype = this->get_backend(gogo);
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ size_t align = gogo->backend()->type_alignment(btype);
+ *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)
+{
+ Btype* btype = this->get_backend(gogo);
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ size_t a = gogo->backend()->type_field_alignment(btype);
+ *palign = static_cast<unsigned int>(a);
+ if (*palign != a)
+ return false;
+ return true;
+}
+
// Default function to export a type.
void
{ }
protected:
+ bool
+ do_compare_is_identity() const
+ { return false; }
+
Btype*
do_get_backend(Gogo* gogo)
{ return gogo->backend()->error_type(); }
- tree
- do_get_init_tree(Gogo*, tree, bool)
- { return error_mark_node; }
-
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
{ }
protected:
+ bool
+ do_compare_is_identity() const
+ { return false; }
+
Btype*
do_get_backend(Gogo* gogo)
{ return gogo->backend()->void_type(); }
- tree
- do_get_init_tree(Gogo*, tree, bool)
- { go_unreachable(); }
-
Expression*
do_type_descriptor(Gogo*, Named_type*)
{ go_unreachable(); }
{ }
protected:
+ bool
+ do_compare_is_identity() const
+ { return true; }
+
Btype*
do_get_backend(Gogo* gogo)
{ return gogo->backend()->bool_type(); }
- tree
- do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
- { return is_clear ? NULL : fold_convert(type_tree, boolean_false_node); }
-
Expression*
do_type_descriptor(Gogo*, Named_type* name);
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));
return gogo->backend()->integer_type(this->is_unsigned_, this->bits_);
}
-tree
-Integer_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- return is_clear ? NULL : build_int_cst(type_tree, 0);
-}
-
// The type descriptor for an integer type. Integer types are always
// named.
{
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));
return gogo->backend()->float_type(this->bits_);
}
-tree
-Float_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- 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);
-}
-
// The type descriptor for a float type. Float types are always named.
Expression*
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,
return gogo->backend()->complex_type(this->bits_);
}
-// Zero initializer.
-
-tree
-Complex_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- 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));
-}
-
// The type descriptor for a complex type. Complex types are always
// named.
Type* pb = Type::make_pointer_type(b);
fields[0].name = "__data";
fields[0].btype = pb->get_backend(gogo);
- fields[0].location = UNKNOWN_LOCATION;
+ 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 = UNKNOWN_LOCATION;
+ fields[1].location = fields[0].location;
backend_string_type = gogo->backend()->struct_type(fields);
}
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;
-
- go_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*
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:
+ bool
+ do_compare_is_identity() const
+ { return false; }
+
Btype*
do_get_backend(Gogo*)
{ go_unreachable(); }
- tree
- do_get_init_tree(Gogo*, tree, bool)
- { go_unreachable(); }
-
Expression*
do_type_descriptor(Gogo*, Named_type*)
{ go_unreachable(); }
}
}
-// Functions are initialized to NULL.
-
-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);
-}
-
// The type of a function type descriptor.
Type*
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();
- go_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;
- go_assert(p->field_name() == "dotdotdot");
+ go_assert(p->is_field_name("dotdotdot"));
vals->push_back(Expression::make_boolean(this->is_varargs(), bloc));
++p;
- go_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;
- go_assert(p->field_name() == "out");
+ go_assert(p->is_field_name("out"));
vals->push_back(this->type_descriptor_params(p->type(), NULL,
this->results()));
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)
{
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 gogo->backend()->pointer_type(to_btype);
}
-// Initialize a pointer type.
-
-tree
-Pointer_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);
-}
-
// The type of a pointer type descriptor.
Type*
}
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();
- go_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;
- go_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:
+ bool
+ do_compare_is_identity() const
+ { return false; }
+
Btype*
do_get_backend(Gogo* gogo)
{ return gogo->backend()->pointer_type(gogo->backend()->void_type()); }
- tree
- do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
- { return is_clear ? NULL : fold_convert(type_tree, null_pointer_node); }
-
Expression*
do_type_descriptor(Gogo*, Named_type*)
{ go_unreachable(); }
return false;
}
+ bool
+ do_compare_is_identity() const
+ { return false; }
+
Btype*
do_get_backend(Gogo* gogo)
{
return gogo->backend()->error_type();
}
- tree
- do_get_init_tree(Gogo*, tree, bool)
- {
- go_assert(saw_errors());
- return error_mark_node;
- }
-
Expression*
do_type_descriptor(Gogo*, Named_type*)
{
go_assert(saw_errors());
- return Expression::make_error(UNKNOWN_LOCATION);
+ return Expression::make_error(Linemap::unknown_location());
}
void
}
}
+// 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.
return false;
}
+// Whether comparisons of this struct type are simple identity
+// comparisons.
+
+bool
+Struct_type::do_compare_is_identity() const
+{
+ const Struct_field_list* fields = this->fields_;
+ if (fields == NULL)
+ return true;
+ for (Struct_field_list::const_iterator pf = fields->begin();
+ pf != fields->end();
+ ++pf)
+ if (!pf->type()->compare_is_identity())
+ return false;
+ 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, NULL,
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
{
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);
void
Struct_type::finalize_methods(Gogo* gogo)
{
+ // If this type needs explicit comparison and hash functions, create
+ // them now. It would be a bit better to do this only if the
+ // functions are needed, but they will be static so the backend can
+ // discard them if they are not used.
+ if (!this->compare_is_identity() && this->is_comparable())
+ {
+ Named_object* hash_fn;
+ Named_object* equal_fn;
+ this->type_functions(gogo, NULL, NULL, NULL, &hash_fn, &equal_fn);
+ }
+
if (this->all_methods_ != NULL)
return;
Type::finalize_methods(gogo, this, this->location_, &this->all_methods_);
return gogo->backend()->struct_type(bfields);
}
-// Initialize struct fields.
-
-tree
-Struct_type::do_get_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
-{
- 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;
- go_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;
- }
- }
- go_assert(field == NULL_TREE);
-
- if (!any_fields_set)
- {
- go_assert(is_clear);
- VEC_free(constructor_elt, gc, init);
- return NULL;
- }
-
- tree ret = build_constructor(type_tree, init);
- if (is_constant)
- TREE_CONSTANT(ret) = 1;
- return ret;
-}
-
// The type of a struct type descriptor.
Type*
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();
go_assert(methods == NULL || name == NULL);
Struct_field_list::const_iterator ps = fields->begin();
- go_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;
- go_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();
- go_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;
- go_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;
- go_assert(q->field_name() == "typ");
+ go_assert(q->is_field_name("typ"));
fvals->push_back(Expression::make_type_descriptor(pf->type(), bloc));
++q;
- go_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;
- go_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)
+{
+ Btype* btype = this->get_backend(gogo);
+ if (!this->is_backend_type_size_known(gogo))
+ return false;
+ size_t offset = gogo->backend()->type_field_offset(btype, index);
+ *poffset = static_cast<unsigned int>(offset);
+ if (*poffset != offset)
+ return false;
+ return true;
+}
+
// Export.
void
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;
}
Struct_type*
Type::make_struct_type(Struct_field_list* fields,
- source_location location)
+ Location location)
{
return new Struct_type(fields, location);
}
return false;
}
+// If this type needs explicit comparison and hash functions, create
+// them now. It would be a bit better to do this only if the
+// functions are needed, but they will be static so the backend can
+// discard them if they are not used.
+
+void
+Array_type::finalize_methods(Gogo* gogo)
+{
+ if (this->length_ != NULL
+ && !this->length_->is_nil_expression()
+ && !this->compare_is_identity()
+ && this->is_comparable())
+ {
+ Named_object* hash_fn;
+ Named_object* equal_fn;
+ this->type_functions(gogo, NULL, NULL, NULL, &hash_fn, &equal_fn);
+ }
+}
+
// Traversal.
int
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.
+
+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.
-bool
-Array_type::do_check_make_expression(Expression_list* args,
- source_location location)
+void
+Array_type::write_equal_function(Gogo* gogo, Named_type* name)
{
- go_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
Type* pet = Type::make_pointer_type(type->element_type());
Btype* pbet = pet->get_backend(gogo);
+ Location ploc = Linemap::predeclared_location();
Backend::Btyped_identifier* p = &(*bfields)[0];
p->name = "__values";
p->btype = pbet;
- p->location = UNKNOWN_LOCATION;
+ p->location = ploc;
Type* int_type = Type::lookup_integer_type("int");
p = &(*bfields)[1];
p->name = "__count";
p->btype = int_type->get_backend(gogo);
- p->location = UNKNOWN_LOCATION;
+ p->location = ploc;
p = &(*bfields)[2];
p->name = "__capacity";
p->btype = int_type->get_backend(gogo);
- p->location = UNKNOWN_LOCATION;
+ p->location = ploc;
}
// Get a tree for the type of this array. A fixed array is simply
return tree_to_expr(this->get_length_tree(gogo));
}
-// Return an initializer for an array type.
-
-tree
-Array_type::do_get_init_tree(Gogo* gogo, tree type_tree, bool is_clear)
-{
- if (this->length_ == NULL)
- {
- // Open array.
-
- if (is_clear)
- return NULL;
-
- go_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;
- }
- 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;
- }
-}
-
-// Handle the builtin make function for a slice.
-
-tree
-Array_type::do_make_expression_tree(Translate_context* context,
- Expression_list* args,
- source_location location)
-{
- go_assert(this->length_ == NULL);
-
- Gogo* gogo = context->gogo();
- tree type_tree = type_to_tree(this->get_backend(gogo));
- if (type_tree == error_mark_node)
- return error_mark_node;
-
- tree values_field = TYPE_FIELDS(type_tree);
- go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(values_field)),
- "__values") == 0);
-
- tree count_field = DECL_CHAIN(values_field);
- go_assert(strcmp(IDENTIFIER_POINTER(DECL_NAME(count_field)),
- "__count") == 0);
-
- tree element_type_tree = type_to_tree(this->element_type_->get_backend(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);
- if (value == error_mark_node)
- return error_mark_node;
-
- // The first argument is the number of elements, the optional second
- // argument is the capacity.
- go_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;
- 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);
-
- space = fold_convert(TREE_TYPE(values_field), space);
-
- 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);
- }
-
- tree constructor = gogo->slice_constructor(type_tree, space, length_tree,
- capacity_tree);
-
- if (value == NULL_TREE)
- {
- // The array contents are zero initialized.
- return constructor;
- }
-
- // 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(constructor),
- 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.
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();
- go_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;
- go_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->element_type_, bloc));
++p;
- go_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;
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();
- go_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;
- go_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->element_type_, bloc));
++p;
bool
Map_type::do_verify()
{
- if (this->key_type_->struct_type() != NULL
- || this->key_type_->array_type() != NULL)
+ // 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 false;
+ 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 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.
{
std::vector<Backend::Btyped_identifier> bfields(4);
+ Location bloc = Linemap::predeclared_location();
+
Type* pdt = Type::make_type_descriptor_ptr_type();
bfields[0].name = "__descriptor";
bfields[0].btype = pdt->get_backend(gogo);
- bfields[0].location = BUILTINS_LOCATION;
+ bfields[0].location = bloc;
Type* uintptr_type = Type::lookup_integer_type("uintptr");
bfields[1].name = "__element_count";
bfields[1].btype = uintptr_type->get_backend(gogo);
- bfields[1].location = BUILTINS_LOCATION;
+ bfields[1].location = bloc;
bfields[2].name = "__bucket_count";
bfields[2].btype = bfields[1].btype;
- bfields[2].location = BUILTINS_LOCATION;
+ bfields[2].location = bloc;
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 = BUILTINS_LOCATION;
+ bfields[3].location = bloc;
Btype *bt = gogo->backend()->struct_type(bfields);
- bt = gogo->backend()->named_type("__go_map", bt, BUILTINS_LOCATION);
+ bt = gogo->backend()->named_type("__go_map", bt, bloc);
backend_map_type = gogo->backend()->pointer_type(bt);
}
return backend_map_type;
}
-// 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);
-}
-
-// Return an expression for a newly allocated map.
-
-tree
-Map_type::do_make_expression_tree(Translate_context* context,
- Expression_list* args,
- source_location location)
-{
- 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);
- }
-
- tree map_type = type_to_tree(this->get_backend(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;
-
- 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);
- }
-}
-
// The type of a map type descriptor.
Type*
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();
- go_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;
- go_assert(p->field_name() == "key");
+ go_assert(p->is_field_name("key"));
vals->push_back(Expression::make_type_descriptor(this->key_type_, bloc));
++p;
- go_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->val_type_, bloc));
++p;
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.
{
std::vector<Backend::Btyped_identifier> bfields;
Btype* bt = gogo->backend()->struct_type(bfields);
- bt = gogo->backend()->named_type("__go_channel", bt, BUILTINS_LOCATION);
+ bt = gogo->backend()->named_type("__go_channel", bt,
+ Linemap::predeclared_location());
backend_channel_type = gogo->backend()->pointer_type(bt);
}
return backend_channel_type;
}
-// 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)
-{
- Gogo* gogo = context->gogo();
- tree channel_type = type_to_tree(this->get_backend(gogo));
-
- tree element_tree = type_to_tree(this->element_type_->get_backend(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
- {
- 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);
- }
-}
-
// Build a type descriptor for a channel type.
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();
- go_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;
- go_assert(p->field_name() == "elem");
+ go_assert(p->is_field_name("elem"));
vals->push_back(Expression::make_type_descriptor(this->element_type_, bloc));
++p;
- go_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_)
{
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 = UNKNOWN_LOCATION;
+ 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 = UNKNOWN_LOCATION;
+ bfields[1].location = bloc;
empty_interface_type = gogo->backend()->struct_type(bfields);
}
get_backend_interface_fields(Gogo* gogo, Interface_type* type,
std::vector<Backend::Btyped_identifier>* bfields)
{
- source_location loc = type->location();
+ Location loc = type->location();
std::vector<Backend::Btyped_identifier> mfields(type->methods()->size() + 1);
Type* vt = Type::make_pointer_type(Type::make_void_type());
(*bfields)[1].name = "__object";
(*bfields)[1].btype = vt->get_backend(gogo);
- (*bfields)[1].location = UNKNOWN_LOCATION;
+ (*bfields)[1].location = Linemap::predeclared_location();
}
// Return a tree for an interface type. An interface is a pointer to
}
}
-// Initialization value.
-
-tree
-Interface_type::do_get_init_tree(Gogo*, tree type_tree, bool is_clear)
-{
- 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))
- {
- constructor_elt* elt = VEC_quick_push(constructor_elt, init, NULL);
- elt->index = field;
- elt->value = fold_convert(TREE_TYPE(field), null_pointer_node);
- }
-
- tree ret = build_constructor(type_tree, init);
- TREE_CONSTANT(ret) = 1;
- return ret;
-}
-
// The type of an interface type descriptor.
Type*
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();
- go_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;
- go_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())
mvals->reserve(3);
Struct_field_list::const_iterator pmf = mfields->begin();
- go_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;
- go_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;
- go_assert(pmf->field_name() == "typ");
+ go_assert(pmf->is_field_name("typ"));
mvals->push_back(Expression::make_type_descriptor(pm->type(), bloc));
++pmf;
ret->append("interface {");
if (this->methods_ != NULL)
{
+ ret->push_back(' ');
for (Typed_identifier_list::const_iterator p = this->methods_->begin();
p != this->methods_->end();
++p)
{
if (p != this->methods_->begin())
- ret->append(";");
- ret->push_back(' ');
- ret->append(Gogo::unpack_hidden_name(p->name()));
+ ret->append("; ");
+ 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.
Interface_type*
Type::make_interface_type(Typed_identifier_list* methods,
- source_location location)
+ Location location)
{
return new Interface_type(methods, location);
}
// 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
// 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
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);
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);
void
Named_type::finalize_methods(Gogo* gogo)
{
+ // If this type needs explicit comparison and hash functions, create
+ // them now. It would be a bit better to do this only if the
+ // functions are needed, but they will be static so the backend can
+ // discard them if they are not used.
+ if ((this->struct_type() != NULL
+ || (this->array_type() != NULL && !this->is_slice_type()))
+ && !this->compare_is_identity()
+ && this->is_comparable())
+ {
+ Named_object* hash_fn;
+ Named_object* equal_fn;
+ this->type_functions(gogo, this, NULL, NULL, &hash_fn, &equal_fn);
+ }
+
if (this->all_methods_ != NULL)
return;
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;
}
// 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)
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() const
+{
+ if (this->seen_)
+ return false;
+ this->seen_ = true;
+ bool ret = this->type_->compare_is_identity();
+ this->seen_ = false;
return ret;
}
case TYPE_ARRAY:
// Slice types were completed in create_placeholder.
- if (!base->is_open_array_type())
+ if (!base->is_slice_type())
{
Btype* bet = base->array_type()->get_backend_element(gogo);
Bexpression* blen = base->array_type()->get_backend_length(gogo);
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
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 (base->is_open_array_type())
+ if (base->is_slice_type())
bt = gogo->backend()->placeholder_struct_type(this->name(),
this->location_);
else
- bt = gogo->backend()->placeholder_array_type(this->name(),
- this->location_);
+ {
+ bt = gogo->backend()->placeholder_array_type(this->name(),
+ this->location_);
+ this->is_placeholder_ = true;
+ }
set_name = false;
break;
this->named_btype_ = bt;
- if (base->is_open_array_type())
+ 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
case TYPE_FUNCTION:
// Don't build a circular data structure. GENERIC can't handle
// it.
- if (this->seen_ > 0)
+ if (this->seen_in_get_backend_)
{
this->is_circular_ = true;
return gogo->backend()->circular_pointer_type(bt, true);
}
- ++this->seen_;
+ this->seen_in_get_backend_ = true;
bt1 = Type::get_named_base_btype(gogo, base);
- --this->seen_;
+ 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))
case TYPE_POINTER:
// Don't build a circular data structure. GENERIC can't handle
// it.
- if (this->seen_ > 0)
+ if (this->seen_in_get_backend_)
{
this->is_circular_ = true;
return gogo->backend()->circular_pointer_type(bt, false);
}
- ++this->seen_;
+ this->seen_in_get_backend_ = true;
bt1 = Type::get_named_base_btype(gogo, base);
- --this->seen_;
+ 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))
void
Named_type::do_reflection(Gogo* gogo, std::string* ret) const
{
- if (this->location() != BUILTINS_LOCATION)
+ if (!Linemap::is_predeclared_location(this->location()))
{
const Package* package = this->named_object_->package();
if (package != NULL)
{
Named_object* no = this->named_object_;
std::string name;
- if (this->location() == BUILTINS_LOCATION)
+ if (Linemap::is_predeclared_location(this->location()))
go_assert(this->in_function_ == NULL);
else
{
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;
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);
go_assert(receiver_object != 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));
}
- Statement* retstat = Statement::make_return_statement(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;
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);
{
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)
pf != fields->end();
++pf)
{
- if (pf->field_name() == name)
+ if (pf->is_field_name(name))
{
*is_method = false;
if (nt != NULL)
// 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;
}
}
{
// We found an ambiguity.
go_assert(found_parent != NULL);
- found_ambig1 = found_parent->field_name();
- found_ambig2 = pf->field_name();
+ found_ambig1 = Gogo::message_name(found_parent->field_name());
+ found_ambig2 = Gogo::message_name(pf->field_name());
}
else
{
Named_object*
Forward_declaration_type::add_method_declaration(const std::string& name,
Function_type* type,
- source_location location)
+ Location location)
{
Named_object* no = this->named_object();
if (no->is_unknown())
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_nil(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);
}
}
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