X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=type.c;h=08c029a315de3f8b2dac0df13a13a743b55caeba;hb=e78a2d387be3e06a805c0501b8c5b3ef02bdadf5;hp=aaefda1f6d717d47675c980ba77d9f32c1a9dd0b;hpb=aa8b7bf2f96c1f47a68e96a5a2a125fc91cb0cc2;p=cparser

diff --git a/type.c b/type.c
index aaefda1..08c029a 100644
--- a/type.c
+++ b/type.c
@@ -23,6 +23,7 @@
 #include <assert.h>
 
 #include "type_t.h"
+#include "entity_t.h"
 #include "symbol_t.h"
 #include "type_hash.h"
 #include "adt/error.h"
@@ -51,6 +52,12 @@ static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
 		.alignment  = 0,
 		.flags      = ATOMIC_TYPE_FLAG_NONE
 	},
+	[ATOMIC_TYPE_WCHAR_T] = {
+		.size       = (unsigned)-1,
+		.alignment  = (unsigned)-1,
+		/* signed flag will be set when known */
+		.flags      = ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_ARITHMETIC,
+	},
 	[ATOMIC_TYPE_CHAR] = {
 		.size       = 1,
 		.alignment  = 1,
@@ -173,7 +180,11 @@ void init_types(void)
 	props[ATOMIC_TYPE_LONGLONG].alignment    = 4;
 	props[ATOMIC_TYPE_ULONGLONG].alignment   = 4;
 
-	props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UINT];
+	/* TODO: make this configurable for platforms which do not use byte sized
+	 * bools. */
+	props[ATOMIC_TYPE_BOOL] = props[ATOMIC_TYPE_UCHAR];
+
+	props[ATOMIC_TYPE_WCHAR_T] = props[wchar_atomic_kind];
 }
 
 void exit_types(void)
@@ -193,9 +204,44 @@ void inc_type_visited(void)
 
 void print_type_qualifiers(type_qualifiers_t qualifiers)
 {
-	if (qualifiers & TYPE_QUALIFIER_CONST)    fputs("const ",    out);
-	if (qualifiers & TYPE_QUALIFIER_VOLATILE) fputs("volatile ", out);
-	if (qualifiers & TYPE_QUALIFIER_RESTRICT) fputs("restrict ", out);
+	int first = 1;
+	if (qualifiers & TYPE_QUALIFIER_CONST) {
+		fputs(" const" + first,    out);
+		first = 0;
+	}
+	if (qualifiers & TYPE_QUALIFIER_VOLATILE) {
+		fputs(" volatile" + first, out);
+		first = 0;
+	}
+	if (qualifiers & TYPE_QUALIFIER_RESTRICT) {
+		fputs(" restrict" + first, out);
+		first = 0;
+	}
+}
+
+const char *get_atomic_kind_name(atomic_type_kind_t kind)
+{
+	switch(kind) {
+	case ATOMIC_TYPE_INVALID: break;
+	case ATOMIC_TYPE_VOID:        return "void";
+	case ATOMIC_TYPE_WCHAR_T:     return "wchar_t";
+	case ATOMIC_TYPE_BOOL:        return c_mode & _CXX ? "bool" : "_Bool";
+	case ATOMIC_TYPE_CHAR:        return "char";
+	case ATOMIC_TYPE_SCHAR:       return "signed char";
+	case ATOMIC_TYPE_UCHAR:       return "unsigned char";
+	case ATOMIC_TYPE_INT:         return "int";
+	case ATOMIC_TYPE_UINT:        return "unsigned int";
+	case ATOMIC_TYPE_SHORT:       return "short";
+	case ATOMIC_TYPE_USHORT:      return "unsigned short";
+	case ATOMIC_TYPE_LONG:        return "long";
+	case ATOMIC_TYPE_ULONG:       return "unsigned long";
+	case ATOMIC_TYPE_LONGLONG:    return "long long";
+	case ATOMIC_TYPE_ULONGLONG:   return "unsigned long long";
+	case ATOMIC_TYPE_LONG_DOUBLE: return "long double";
+	case ATOMIC_TYPE_FLOAT:       return "float";
+	case ATOMIC_TYPE_DOUBLE:      return "double";
+	}
+	return "INVALIDATOMIC";
 }
 
 /**
@@ -203,29 +249,9 @@ void print_type_qualifiers(type_qualifiers_t qualifiers)
  *
  * @param kind  The type kind.
  */
-static
-void print_atomic_kinds(atomic_type_kind_t kind)
+static void print_atomic_kinds(atomic_type_kind_t kind)
 {
-	const char *s = "INVALIDATOMIC";
-	switch(kind) {
-	case ATOMIC_TYPE_INVALID:                               break;
-	case ATOMIC_TYPE_VOID:        s = "void";               break;
-	case ATOMIC_TYPE_BOOL:        s = "_Bool";              break;
-	case ATOMIC_TYPE_CHAR:        s = "char";               break;
-	case ATOMIC_TYPE_SCHAR:       s = "signed char";        break;
-	case ATOMIC_TYPE_UCHAR:       s = "unsigned char";      break;
-	case ATOMIC_TYPE_INT:         s = "int";                break;
-	case ATOMIC_TYPE_UINT:        s = "unsigned int";       break;
-	case ATOMIC_TYPE_SHORT:       s = "short";              break;
-	case ATOMIC_TYPE_USHORT:      s = "unsigned short";     break;
-	case ATOMIC_TYPE_LONG:        s = "long";               break;
-	case ATOMIC_TYPE_ULONG:       s = "unsigned long";      break;
-	case ATOMIC_TYPE_LONGLONG:    s = "long long";          break;
-	case ATOMIC_TYPE_ULONGLONG:   s = "unsigned long long"; break;
-	case ATOMIC_TYPE_LONG_DOUBLE: s = "long double";        break;
-	case ATOMIC_TYPE_FLOAT:       s = "float";              break;
-	case ATOMIC_TYPE_DOUBLE:      s = "double";             break;
-	}
+	const char *s = get_atomic_kind_name(kind);
 	fputs(s, out);
 }
 
@@ -234,10 +260,11 @@ void print_atomic_kinds(atomic_type_kind_t kind)
  *
  * @param type  The type.
  */
-static
-void print_atomic_type(const atomic_type_t *type)
+static void print_atomic_type(const atomic_type_t *type)
 {
 	print_type_qualifiers(type->base.qualifiers);
+	if (type->base.qualifiers != 0)
+		fputc(' ', out);
 	print_atomic_kinds(type->akind);
 }
 
@@ -249,8 +276,9 @@ void print_atomic_type(const atomic_type_t *type)
 static
 void print_complex_type(const complex_type_t *type)
 {
+	int empty = type->base.qualifiers == 0;
 	print_type_qualifiers(type->base.qualifiers);
-	fputs("_Complex ", out);
+	fputs(" _Complex " + empty, out);
 	print_atomic_kinds(type->akind);
 }
 
@@ -262,8 +290,9 @@ void print_complex_type(const complex_type_t *type)
 static
 void print_imaginary_type(const imaginary_type_t *type)
 {
+	int empty = type->base.qualifiers == 0;
 	print_type_qualifiers(type->base.qualifiers);
-	fputs("_Imaginary ", out);
+	fputs(" _Imaginary " + empty, out);
 	print_atomic_kinds(type->akind);
 }
 
@@ -275,28 +304,36 @@ void print_imaginary_type(const imaginary_type_t *type)
  */
 static void print_function_type_pre(const function_type_t *type, bool top)
 {
+	switch (type->linkage) {
+		case LINKAGE_INVALID:
+			break;
+
+		case LINKAGE_C:
+			if (c_mode & _CXX)
+				fputs("extern \"C\" ",   out);
+			break;
+
+		case LINKAGE_CXX:
+			if (!(c_mode & _CXX))
+				fputs("extern \"C++\" ", out);
+			break;
+	}
+
 	print_type_qualifiers(type->base.qualifiers);
+	if (type->base.qualifiers != 0)
+		fputc(' ', out);
 
 	intern_print_type_pre(type->return_type, false);
 
 	switch (type->calling_convention) {
-	case CC_CDECL:
-		fputs(" __cdecl ", out);
-		break;
-	case CC_STDCALL:
-		fputs(" __stdcall ", out);
-		break;
-	case CC_FASTCALL:
-		fputs(" __fastcall ", out);
-		break;
-	case CC_THISCALL:
-		fputs(" __thiscall ", out);
-		break;
-	case CC_DEFAULT:
-		break;
+	case CC_CDECL:    fputs("__cdecl ",    out); break;
+	case CC_STDCALL:  fputs("__stdcall ",  out); break;
+	case CC_FASTCALL: fputs("__fastcall ", out); break;
+	case CC_THISCALL: fputs("__thiscall ", out); break;
+	case CC_DEFAULT:  break;
 	}
 
-	/* don't emit braces if we're the toplevel type... */
+	/* don't emit parenthesis if we're the toplevel type... */
 	if (!top)
 		fputc('(', out);
 }
@@ -308,13 +345,15 @@ static void print_function_type_pre(const function_type_t *type, bool top)
  * @param top    true, if this is the top type, false if it's an embedded type.
  */
 static void print_function_type_post(const function_type_t *type,
-                                     const scope_t *scope, bool top)
+                                     const scope_t *parameters, bool top)
 {
-	intern_print_type_post(type->return_type, false);
+	/* don't emit parenthesis if we're the toplevel type... */
+	if (!top)
+		fputc(')', out);
 
 	fputc('(', out);
 	bool first = true;
-	if (scope == NULL) {
+	if (parameters == NULL) {
 		function_parameter_t *parameter = type->parameters;
 		for( ; parameter != NULL; parameter = parameter->next) {
 			if (first) {
@@ -325,15 +364,20 @@ static void print_function_type_post(const function_type_t *type,
 			print_type(parameter->type);
 		}
 	} else {
-		declaration_t *parameter = scope->declarations;
-		for( ; parameter != NULL; parameter = parameter->next) {
+		entity_t *parameter = parameters->entities;
+		for (; parameter != NULL; parameter = parameter->base.next) {
 			if (first) {
 				first = false;
 			} else {
 				fputs(", ", out);
 			}
-			print_type_ext(parameter->type, parameter->symbol,
-			               &parameter->scope);
+			assert(is_declaration(parameter));
+			const type_t *const type = parameter->declaration.type;
+			if (type == NULL) {
+				fputs(parameter->base.symbol->string, out);
+			} else {
+				print_type_ext(type, parameter->base.symbol, NULL);
+			}
 		}
 	}
 	if (type->variadic) {
@@ -349,9 +393,7 @@ static void print_function_type_post(const function_type_t *type,
 	}
 	fputc(')', out);
 
-	/* don't emit braces if we're the toplevel type... */
-	if (!top)
-		fputc(')', out);
+	intern_print_type_post(type->return_type, false);
 }
 
 /**
@@ -362,8 +404,28 @@ static void print_function_type_post(const function_type_t *type,
 static void print_pointer_type_pre(const pointer_type_t *type)
 {
 	intern_print_type_pre(type->points_to, false);
-	fputs("*", out);
-	print_type_qualifiers(type->base.qualifiers);
+	variable_t *const variable = type->base_variable;
+	if (variable != NULL) {
+		fputs(" __based(", out);
+		fputs(variable->base.base.symbol->string, out);
+		fputs(") ", out);
+	}
+	fputc('*', out);
+	type_qualifiers_t const qual = type->base.qualifiers;
+	if (qual != 0)
+		fputc(' ', out);
+	print_type_qualifiers(qual);
+}
+
+/**
+ * Prints the prefix part of a reference type.
+ *
+ * @param type   The reference type.
+ */
+static void print_reference_type_pre(const reference_type_t *type)
+{
+	intern_print_type_pre(type->refers_to, false);
+	fputc('&', out);
 }
 
 /**
@@ -376,6 +438,16 @@ static void print_pointer_type_post(const pointer_type_t *type)
 	intern_print_type_post(type->points_to, false);
 }
 
+/**
+ * Prints the postfix part of a reference type.
+ *
+ * @param type   The reference type.
+ */
+static void print_reference_type_post(const reference_type_t *type)
+{
+	intern_print_type_post(type->refers_to, false);
+}
+
 /**
  * Prints the prefix part of an array type.
  *
@@ -398,6 +470,8 @@ static void print_array_type_post(const array_type_t *type)
 		fputs("static ", out);
 	}
 	print_type_qualifiers(type->base.qualifiers);
+	if (type->base.qualifiers != 0)
+		fputc(' ', out);
 	if (type->size_expression != NULL
 			&& (print_implicit_array_size || !type->has_implicit_size)) {
 		print_expression(type->size_expression);
@@ -414,7 +488,7 @@ static void print_array_type_post(const array_type_t *type)
 static void print_bitfield_type_post(const bitfield_type_t *type)
 {
 	fputs(" : ", out);
-	print_expression(type->size);
+	print_expression(type->size_expression);
 	intern_print_type_post(type->base_type, false);
 }
 
@@ -423,34 +497,34 @@ static void print_bitfield_type_post(const bitfield_type_t *type)
  *
  * @param declaration  The enum's type declaration.
  */
-void print_enum_definition(const declaration_t *declaration)
+void print_enum_definition(const enum_t *enume)
 {
 	fputs("{\n", out);
 
 	change_indent(1);
 
-	declaration_t *entry = declaration->next;
-	for( ; entry != NULL && entry->storage_class == STORAGE_CLASS_ENUM_ENTRY;
-	       entry = entry->next) {
+	entity_t *entry = enume->base.next;
+	for( ; entry != NULL && entry->kind == ENTITY_ENUM_VALUE;
+	       entry = entry->base.next) {
 
 		print_indent();
-		fprintf(out, "%s", entry->symbol->string);
-		if (entry->init.initializer != NULL) {
-			fprintf(out, " = ");
+		fputs(entry->base.symbol->string, out);
+		if (entry->enum_value.value != NULL) {
+			fputs(" = ", out);
 
 			/* skip the implicit cast */
-			expression_t *expression = entry->init.enum_value;
+			expression_t *expression = entry->enum_value.value;
 			if (expression->kind == EXPR_UNARY_CAST_IMPLICIT) {
 				expression = expression->unary.value;
 			}
 			print_expression(expression);
 		}
-		fprintf(out, ",\n");
+		fputs(",\n", out);
 	}
 
 	change_indent(-1);
 	print_indent();
-	fputs("}", out);
+	fputc('}', out);
 }
 
 /**
@@ -460,38 +534,43 @@ void print_enum_definition(const declaration_t *declaration)
  */
 static void print_type_enum(const enum_type_t *type)
 {
+	int empty = type->base.qualifiers == 0;
 	print_type_qualifiers(type->base.qualifiers);
-	fputs("enum ", out);
+	fputs(" enum " + empty, out);
 
-	declaration_t *declaration = type->declaration;
-	symbol_t      *symbol      = declaration->symbol;
+	enum_t   *enume  = type->enume;
+	symbol_t *symbol = enume->base.symbol;
 	if (symbol != NULL) {
 		fputs(symbol->string, out);
 	} else {
-		print_enum_definition(declaration);
+		print_enum_definition(enume);
 	}
 }
 
 /**
  * Print the compound part of a compound type.
- *
- * @param declaration  The declaration of the compound type.
  */
-void print_compound_definition(const declaration_t *declaration)
+void print_compound_definition(const compound_t *compound)
 {
 	fputs("{\n", out);
 	change_indent(1);
 
-	declaration_t *iter = declaration->scope.declarations;
-	for( ; iter != NULL; iter = iter->next) {
+	entity_t *entity = compound->members.entities;
+	for( ; entity != NULL; entity = entity->base.next) {
+		if (entity->kind != ENTITY_COMPOUND_MEMBER)
+			continue;
+
 		print_indent();
-		print_declaration(iter);
+		print_entity(entity);
 		fputc('\n', out);
 	}
 
 	change_indent(-1);
 	print_indent();
-	fputs("}", out);
+	fputc('}', out);
+	if (compound->modifiers & DM_TRANSPARENT_UNION) {
+		fputs("__attribute__((__transparent_union__))", out);
+	}
 }
 
 /**
@@ -501,21 +580,22 @@ void print_compound_definition(const declaration_t *declaration)
  */
 static void print_compound_type(const compound_type_t *type)
 {
+	int empty = type->base.qualifiers == 0;
 	print_type_qualifiers(type->base.qualifiers);
 
 	if (type->base.kind == TYPE_COMPOUND_STRUCT) {
-		fputs("struct ", out);
+		fputs(" struct " + empty, out);
 	} else {
 		assert(type->base.kind == TYPE_COMPOUND_UNION);
-		fputs("union ", out);
+		fputs(" union " + empty, out);
 	}
 
-	declaration_t *declaration = type->declaration;
-	symbol_t      *symbol      = declaration->symbol;
+	compound_t *compound = type->compound;
+	symbol_t   *symbol   = compound->base.symbol;
 	if (symbol != NULL) {
 		fputs(symbol->string, out);
 	} else {
-		print_compound_definition(declaration);
+		print_compound_definition(compound);
 	}
 }
 
@@ -527,7 +607,9 @@ static void print_compound_type(const compound_type_t *type)
 static void print_typedef_type_pre(const typedef_type_t *const type)
 {
 	print_type_qualifiers(type->base.qualifiers);
-	fputs(type->declaration->symbol->string, out);
+	if (type->base.qualifiers != 0)
+		fputc(' ', out);
+	fputs(type->typedefe->base.symbol->string, out);
 }
 
 /**
@@ -539,7 +621,6 @@ static void print_typeof_type_pre(const typeof_type_t *const type)
 {
 	fputs("typeof(", out);
 	if (type->expression != NULL) {
-		assert(type->typeof_type == NULL);
 		print_expression(type->expression);
 	} else {
 		print_type(type->typeof_type);
@@ -558,6 +639,7 @@ static void intern_print_type_pre(const type_t *const type, const bool top)
 	switch(type->kind) {
 	case TYPE_ERROR:
 		fputs("<error>", out);
+		return;
 	case TYPE_INVALID:
 		fputs("<invalid>", out);
 		return;
@@ -586,6 +668,9 @@ static void intern_print_type_pre(const type_t *const type, const bool top)
 	case TYPE_POINTER:
 		print_pointer_type_pre(&type->pointer);
 		return;
+	case TYPE_REFERENCE:
+		print_reference_type_pre(&type->reference);
+		return;
 	case TYPE_BITFIELD:
 		intern_print_type_pre(type->bitfield.base_type, top);
 		return;
@@ -617,6 +702,9 @@ static void intern_print_type_post(const type_t *const type, const bool top)
 	case TYPE_POINTER:
 		print_pointer_type_post(&type->pointer);
 		return;
+	case TYPE_REFERENCE:
+		print_reference_type_post(&type->reference);
+		return;
 	case TYPE_ARRAY:
 		print_array_type_post(&type->array);
 		return;
@@ -636,6 +724,10 @@ static void intern_print_type_post(const type_t *const type, const bool top)
 	case TYPE_TYPEDEF:
 		break;
 	}
+
+	if (type->base.modifiers & DM_TRANSPARENT_UNION) {
+		fputs("__attribute__((__transparent_union__))", out);
+	}
 }
 
 /**
@@ -649,7 +741,7 @@ void print_type(const type_t *const type)
 }
 
 void print_type_ext(const type_t *const type, const symbol_t *symbol,
-                    const scope_t *scope)
+                    const scope_t *parameters)
 {
 	if (type == NULL) {
 		fputs("nil type", out);
@@ -662,7 +754,7 @@ void print_type_ext(const type_t *const type, const symbol_t *symbol,
 		fputs(symbol->string, out);
 	}
 	if (type->kind == TYPE_FUNCTION) {
-		print_function_type_post(&type->function, scope, true);
+		print_function_type_post(&type->function, parameters, true);
 	} else {
 		intern_print_type_post(type, true);
 	}
@@ -684,6 +776,7 @@ static size_t get_type_size(const type_t *type)
 	case TYPE_ENUM:            return sizeof(enum_type_t);
 	case TYPE_FUNCTION:        return sizeof(function_type_t);
 	case TYPE_POINTER:         return sizeof(pointer_type_t);
+	case TYPE_REFERENCE:       return sizeof(reference_type_t);
 	case TYPE_ARRAY:           return sizeof(array_type_t);
 	case TYPE_BUILTIN:         return sizeof(builtin_type_t);
 	case TYPE_TYPEDEF:         return sizeof(typedef_type_t);
@@ -721,6 +814,8 @@ type_t *duplicate_type(const type_t *type)
  */
 type_t *get_unqualified_type(type_t *type)
 {
+	assert(!is_typeref(type));
+
 	if (type->base.qualifiers == TYPE_QUALIFIER_NONE)
 		return type;
 
@@ -735,6 +830,38 @@ type_t *get_unqualified_type(type_t *type)
 	return result;
 }
 
+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) == qual)
+			return orig_type;
+
+		copy                   = duplicate_type(type);
+		copy->base.qualifiers |= qual;
+	} else {
+		return type;
+	}
+
+	type = typehash_insert(copy);
+	if (type != copy)
+		obstack_free(type_obst, copy);
+
+	return type;
+}
+
 /**
  * Check if a type is valid.
  *
@@ -774,6 +901,18 @@ bool is_type_integer(const type_t *type)
 	return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_INTEGER);
 }
 
+/**
+ * Returns true if the given type is an enum type.
+ *
+ * @param type  The type to check.
+ * @return True if type is an enum type.
+ */
+bool is_type_enum(const type_t *type)
+{
+	assert(!is_typeref(type));
+	return type->kind == TYPE_ENUM;
+}
+
 /**
  * Returns true if the given type is an floating point type.
  *
@@ -790,6 +929,22 @@ bool is_type_float(const type_t *type)
 	return test_atomic_type_flag(type->atomic.akind, ATOMIC_TYPE_FLAG_FLOAT);
 }
 
+/**
+ * Returns true if the given type is an complex type.
+ *
+ * @param type  The type to check.
+ * @return True if type is a complex type.
+ */
+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);
+}
+
 /**
  * Returns true if the given type is a signed type.
  *
@@ -837,11 +992,16 @@ bool is_type_arithmetic(const type_t *type)
 	}
 }
 
+/**
+ * Returns true if the given type is an integer or float type.
+ *
+ * @param type  The type to check.
+ * @return True if type is an integer or float type.
+ */
 bool is_type_real(const type_t *type)
 {
-	/* 6.2.5.17 */
-	return is_type_integer(type)
-		|| (type->kind == TYPE_ATOMIC && is_type_float(type));
+	/* 6.2.5 (17) */
+	return is_type_integer(type) || is_type_float(type);
 }
 
 /**
@@ -877,14 +1037,10 @@ bool is_type_incomplete(const type_t *type)
 	case TYPE_COMPOUND_STRUCT:
 	case TYPE_COMPOUND_UNION: {
 		const compound_type_t *compound_type = &type->compound;
-		declaration_t         *declaration   = compound_type->declaration;
-		return !declaration->init.complete;
-	}
-	case TYPE_ENUM: {
-		const enum_type_t *enum_type   = &type->enumt;
-		declaration_t     *declaration = enum_type->declaration;
-		return !declaration->init.complete;
+		return !compound_type->compound->complete;
 	}
+	case TYPE_ENUM:
+		return false;
 
 	case TYPE_ARRAY:
 		return type->array.size_expression == NULL
@@ -902,6 +1058,7 @@ bool is_type_incomplete(const type_t *type)
 	case TYPE_BITFIELD:
 	case TYPE_FUNCTION:
 	case TYPE_POINTER:
+	case TYPE_REFERENCE:
 	case TYPE_BUILTIN:
 	case TYPE_ERROR:
 		return false;
@@ -932,6 +1089,12 @@ static bool function_types_compatible(const function_type_t *func1,
 	if (!types_compatible(ret1, ret2))
 		return false;
 
+	if (func1->linkage != func2->linkage)
+		return false;
+
+	if (func1->calling_convention != func2->calling_convention)
+		return false;
+
 	/* can parameters be compared? */
 	if (func1->unspecified_parameters || func2->unspecified_parameters)
 		return true;
@@ -939,9 +1102,6 @@ static bool function_types_compatible(const function_type_t *func1,
 	if (func1->variadic != func2->variadic)
 		return false;
 
-	if (func1->calling_convention != func2->calling_convention)
-		return false;
-
 	/* TODO: handling of unspecified parameters not correct yet */
 
 	/* all argument types must be compatible */
@@ -994,12 +1154,15 @@ bool types_compatible(const type_t *type1, const type_t *type2)
 	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) {
+	switch (type1->kind) {
 	case TYPE_FUNCTION:
 		return function_types_compatible(&type1->function, &type2->function);
 	case TYPE_ATOMIC:
@@ -1017,6 +1180,12 @@ bool types_compatible(const type_t *type1, const type_t *type2)
 		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:
 	case TYPE_ENUM:
@@ -1051,8 +1220,8 @@ type_t *skip_typeref(type_t *type)
 	type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
 	type_modifiers_t  modifiers  = TYPE_MODIFIER_NONE;
 
-	while(true) {
-		switch(type->kind) {
+	while (true) {
+		switch (type->kind) {
 		case TYPE_ERROR:
 			return type;
 		case TYPE_TYPEDEF: {
@@ -1063,7 +1232,7 @@ type_t *skip_typeref(type_t *type)
 				type = typedef_type->resolved_type;
 				break;
 			}
-			type = typedef_type->declaration->type;
+			type = typedef_type->typedefe->type;
 			continue;
 		}
 		case TYPE_TYPEOF: {
@@ -1106,6 +1275,44 @@ type_t *skip_typeref(type_t *type)
 	return type;
 }
 
+type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type) {
+	type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
+
+	while (true) {
+		switch (type->base.kind) {
+		case TYPE_ERROR:
+			return TYPE_QUALIFIER_NONE;
+		case TYPE_TYPEDEF:
+			qualifiers |= type->base.qualifiers;
+			const typedef_type_t *typedef_type = &type->typedeft;
+			if (typedef_type->resolved_type != NULL)
+				type = typedef_type->resolved_type;
+			else
+				type = typedef_type->typedefe->type;
+			continue;
+		case TYPE_TYPEOF: {
+			const typeof_type_t *typeof_type = &type->typeoft;
+			if (typeof_type->typeof_type != NULL) {
+				type = typeof_type->typeof_type;
+			} else {
+				type = typeof_type->expression->base.type;
+			}
+			continue;
+		}
+		case TYPE_ARRAY:
+			if (skip_array_type) {
+				type = type->array.element_type;
+				continue;
+			}
+			break;
+		default:
+			break;
+		}
+		break;
+	}
+	return type->base.qualifiers | qualifiers;
+}
+
 unsigned get_atomic_type_size(atomic_type_kind_t kind)
 {
 	assert(kind <= ATOMIC_TYPE_LAST);
@@ -1223,8 +1430,9 @@ type_t *make_atomic_type(atomic_type_kind_t akind, type_qualifiers_t qualifiers)
 	memset(type, 0, sizeof(atomic_type_t));
 
 	type->kind            = TYPE_ATOMIC;
-	type->base.qualifiers = qualifiers;
+	type->base.size       = get_atomic_type_size(akind);
 	type->base.alignment  = get_atomic_type_alignment(akind);
+	type->base.qualifiers = qualifiers;
 	type->atomic.akind    = akind;
 
 	return identify_new_type(type);
@@ -1279,14 +1487,56 @@ type_t *make_pointer_type(type_t *points_to, type_qualifiers_t qualifiers)
 	type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
 	memset(type, 0, sizeof(pointer_type_t));
 
-	type->kind              = TYPE_POINTER;
-	type->base.qualifiers   = qualifiers;
-	type->base.alignment    = 0;
-	type->pointer.points_to = points_to;
+	type->kind                  = TYPE_POINTER;
+	type->base.qualifiers       = qualifiers;
+	type->base.alignment        = 0;
+	type->pointer.points_to     = points_to;
+	type->pointer.base_variable = NULL;
+
+	return identify_new_type(type);
+}
+
+/**
+ * Creates a new reference type.
+ *
+ * @param refers_to   The referred-to type for the new type.
+ */
+type_t *make_reference_type(type_t *refers_to)
+{
+	type_t *type = obstack_alloc(type_obst, sizeof(reference_type_t));
+	memset(type, 0, sizeof(reference_type_t));
+
+	type->kind                = TYPE_REFERENCE;
+	type->base.qualifiers     = 0;
+	type->base.alignment      = 0;
+	type->reference.refers_to = refers_to;
+
+	return identify_new_type(type);
+}
+
+/**
+ * Creates a new based pointer type.
+ *
+ * @param points_to   The points-to type for the new type.
+ * @param qualifiers  Type qualifiers for the new type.
+ * @param variable    The based variable
+ */
+type_t *make_based_pointer_type(type_t *points_to,
+								type_qualifiers_t qualifiers, variable_t *variable)
+{
+	type_t *type = obstack_alloc(type_obst, sizeof(pointer_type_t));
+	memset(type, 0, sizeof(pointer_type_t));
+
+	type->kind                  = TYPE_POINTER;
+	type->base.qualifiers       = qualifiers;
+	type->base.alignment        = 0;
+	type->pointer.points_to     = points_to;
+	type->pointer.base_variable = variable;
 
 	return identify_new_type(type);
 }
 
+
 type_t *make_array_type(type_t *element_type, size_t size,
                         type_qualifiers_t qualifiers)
 {