+ case TYPE_ARRAY:
+ print_array_type_post(&type->array);
+ return;
+ case TYPE_ERROR:
+ case TYPE_ATOMIC:
+ case TYPE_COMPLEX:
+ case TYPE_IMAGINARY:
+ case TYPE_ENUM:
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION:
+ case TYPE_TYPEOF:
+ case TYPE_TYPEDEF:
+ break;
+ }
+}
+
+void print_type(const type_t *const type)
+{
+ print_type_ext(type, NULL, NULL);
+}
+
+void print_type_ext(const type_t *const type, const symbol_t *symbol,
+ const scope_t *parameters)
+{
+ intern_print_type_pre(type);
+ if (symbol != NULL) {
+ print_char(' ');
+ print_string(symbol->string);
+ }
+ if (type->kind == TYPE_FUNCTION) {
+ print_function_type_post(&type->function, parameters);
+ } else {
+ intern_print_type_post(type);
+ }
+}
+
+type_t *duplicate_type(const type_t *type)
+{
+ size_t size = get_type_struct_size(type->kind);
+
+ type_t *const copy = obstack_alloc(&type_obst, size);
+ memcpy(copy, type, size);
+ copy->base.firm_type = NULL;
+
+ return copy;
+}
+
+type_t *get_unqualified_type(type_t *type)
+{
+ assert(!is_typeref(type));
+
+ if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
+ return type;
+
+ type_t *unqualified_type = duplicate_type(type);
+ unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
+
+ return identify_new_type(unqualified_type);
+}
+
+type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
+{
+ type_t *type = skip_typeref(orig_type);
+
+ type_t *copy;
+ if (is_type_array(type)) {
+ /* For array types the element type has to be adjusted */
+ type_t *element_type = type->array.element_type;
+ type_t *qual_element_type = get_qualified_type(element_type, qual);
+
+ if (qual_element_type == element_type)
+ return orig_type;
+
+ copy = duplicate_type(type);
+ copy->array.element_type = qual_element_type;
+ } else if (is_type_valid(type)) {
+ if ((type->base.qualifiers & qual) == (int)qual)
+ return orig_type;
+
+ copy = duplicate_type(type);
+ copy->base.qualifiers |= qual;
+ } else {
+ return type;
+ }
+
+ return identify_new_type(copy);
+}
+
+static bool test_atomic_type_flag(atomic_type_kind_t kind,
+ atomic_type_flag_t flag)
+{
+ assert(kind <= ATOMIC_TYPE_LAST);
+ return (atomic_type_properties[kind].flags & flag) != 0;
+}
+
+bool is_type_integer(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ if (type->kind == TYPE_ENUM)
+ return true;
+ if (type->kind != TYPE_ATOMIC)
+ return false;
+
+ return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
+}
+
+bool is_type_enum(const type_t *type)
+{
+ assert(!is_typeref(type));
+ return type->kind == TYPE_ENUM;
+}
+
+bool is_type_float(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ if (type->kind != TYPE_ATOMIC)
+ return false;
+
+ return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
+}
+
+bool is_type_complex(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ if (type->kind != TYPE_ATOMIC)
+ return false;
+
+ return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_COMPLEX);
+}
+
+bool is_type_signed(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ /* enum types are int for now */
+ if (type->kind == TYPE_ENUM)
+ return true;
+ if (type->kind != TYPE_ATOMIC)
+ return false;
+
+ return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_SIGNED);
+}
+
+bool is_type_arithmetic(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ switch(type->kind) {
+ case TYPE_ENUM:
+ return true;
+ case TYPE_ATOMIC:
+ case TYPE_COMPLEX:
+ case TYPE_IMAGINARY:
+ return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_ARITHMETIC);
+ default:
+ return false;
+ }
+}
+
+bool is_type_real(const type_t *type)
+{
+ /* 6.2.5 (17) */
+ return is_type_integer(type) || is_type_float(type);
+}
+
+bool is_type_scalar(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ if (type->kind == TYPE_POINTER)
+ return true;
+
+ return is_type_arithmetic(type);
+}
+
+bool is_type_incomplete(const type_t *type)
+{
+ assert(!is_typeref(type));
+
+ switch(type->kind) {
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION: {
+ const compound_type_t *compound_type = &type->compound;
+ return !compound_type->compound->complete;
+ }
+ case TYPE_ENUM:
+ return false;
+
+ case TYPE_ARRAY:
+ return type->array.size_expression == NULL
+ && !type->array.size_constant;
+
+ case TYPE_ATOMIC:
+ case TYPE_IMAGINARY:
+ case TYPE_COMPLEX:
+ return type->atomic.akind == ATOMIC_TYPE_VOID;
+
+ case TYPE_FUNCTION:
+ case TYPE_POINTER:
+ case TYPE_REFERENCE:
+ case TYPE_ERROR:
+ return false;
+
+ case TYPE_TYPEDEF:
+ case TYPE_TYPEOF:
+ panic("is_type_incomplete called without typerefs skipped");
+ }
+
+ panic("invalid type found");
+}
+
+bool is_type_object(const type_t *type)
+{
+ return !is_type_function(type) && !is_type_incomplete(type);
+}
+
+/**
+ * Check if two function types are compatible.
+ */
+static bool function_types_compatible(const function_type_t *func1,
+ const function_type_t *func2)
+{
+ const type_t* const ret1 = skip_typeref(func1->return_type);
+ const type_t* const ret2 = skip_typeref(func2->return_type);
+ if (!types_compatible(ret1, ret2))
+ return false;
+
+ if (func1->linkage != func2->linkage)
+ return false;
+
+ cc_kind_t cc1 = func1->calling_convention;
+ if (cc1 == CC_DEFAULT)
+ cc1 = default_calling_convention;
+ cc_kind_t cc2 = func2->calling_convention;
+ if (cc2 == CC_DEFAULT)
+ cc2 = default_calling_convention;
+
+ if (cc1 != cc2)
+ return false;
+
+ if (func1->variadic != func2->variadic)
+ return false;
+
+ /* can parameters be compared? */
+ if ((func1->unspecified_parameters && !func1->kr_style_parameters)
+ || (func2->unspecified_parameters && !func2->kr_style_parameters))
+ return true;
+
+ /* TODO: handling of unspecified parameters not correct yet */
+
+ /* all argument types must be compatible */
+ function_parameter_t *parameter1 = func1->parameters;
+ function_parameter_t *parameter2 = func2->parameters;
+ for ( ; parameter1 != NULL && parameter2 != NULL;
+ parameter1 = parameter1->next, parameter2 = parameter2->next) {
+ type_t *parameter1_type = skip_typeref(parameter1->type);
+ type_t *parameter2_type = skip_typeref(parameter2->type);
+
+ parameter1_type = get_unqualified_type(parameter1_type);
+ parameter2_type = get_unqualified_type(parameter2_type);
+
+ if (!types_compatible(parameter1_type, parameter2_type))
+ return false;
+ }
+ /* same number of arguments? */
+ if (parameter1 != NULL || parameter2 != NULL)
+ return false;
+
+ return true;
+}
+
+/**
+ * Check if two array types are compatible.
+ */
+static bool array_types_compatible(const array_type_t *array1,
+ const array_type_t *array2)
+{
+ type_t *element_type1 = skip_typeref(array1->element_type);
+ type_t *element_type2 = skip_typeref(array2->element_type);
+ if (!types_compatible(element_type1, element_type2))
+ return false;
+
+ if (!array1->size_constant || !array2->size_constant)
+ return true;
+
+ return array1->size == array2->size;
+}
+
+bool types_compatible(const type_t *type1, const type_t *type2)
+{
+ assert(!is_typeref(type1));
+ assert(!is_typeref(type2));
+
+ /* shortcut: the same type is always compatible */
+ if (type1 == type2)
+ return true;
+
+ if (!is_type_valid(type1) || !is_type_valid(type2))
+ return true;
+
+ if (type1->base.qualifiers != type2->base.qualifiers)
+ return false;
+ if (type1->kind != type2->kind)
+ return false;
+
+ switch (type1->kind) {
+ case TYPE_FUNCTION:
+ return function_types_compatible(&type1->function, &type2->function);
+ case TYPE_ATOMIC:
+ case TYPE_IMAGINARY:
+ case TYPE_COMPLEX:
+ return type1->atomic.akind == type2->atomic.akind;
+ case TYPE_ARRAY:
+ return array_types_compatible(&type1->array, &type2->array);
+
+ case TYPE_POINTER: {
+ const type_t *const to1 = skip_typeref(type1->pointer.points_to);
+ const type_t *const to2 = skip_typeref(type2->pointer.points_to);
+ return types_compatible(to1, to2);
+ }
+
+ case TYPE_REFERENCE: {
+ const type_t *const to1 = skip_typeref(type1->reference.refers_to);
+ const type_t *const to2 = skip_typeref(type2->reference.refers_to);
+ return types_compatible(to1, to2);
+ }
+
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION: {
+ break;