X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=type.c;h=d5d4a014838d5db796614b1502a5a95b6ddf7ab4;hb=46ef2e565f46ee5876872ef250796e428c3ac6df;hp=99c73a96d9d35ab7cc65672d8e71276f95e99a4b;hpb=6aad82682d63799b99ee7803deaed589f8ecc69b;p=cparser

diff --git a/type.c b/type.c
index 99c73a9..d5d4a01 100644
--- a/type.c
+++ b/type.c
@@ -23,9 +23,11 @@
 #include <assert.h>
 
 #include "type_t.h"
+#include "entity_t.h"
 #include "symbol_t.h"
 #include "type_hash.h"
 #include "adt/error.h"
+#include "adt/util.h"
 #include "lang_features.h"
 
 static struct obstack   _type_obst;
@@ -51,6 +53,12 @@ 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 +181,11 @@ 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)
@@ -208,34 +220,39 @@ void print_type_qualifiers(type_qualifiers_t qualifiers)
 	}
 }
 
+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";
+}
+
 /**
  * Prints the name of an atomic type kinds.
  *
  * @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);
 }
 
@@ -244,8 +261,7 @@ 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)
@@ -289,28 +305,33 @@ 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 parenthesis if we're the toplevel type... */
@@ -325,7 +346,7 @@ 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)
 {
 	/* don't emit parenthesis if we're the toplevel type... */
 	if (!top)
@@ -333,7 +354,7 @@ static void print_function_type_post(const function_type_t *type,
 
 	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) {
@@ -344,15 +365,22 @@ 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 (parameter->kind != ENTITY_PARAMETER)
+				continue;
+
 			if (first) {
 				first = false;
 			} else {
 				fputs(", ", out);
 			}
-			print_type_ext(parameter->type, parameter->symbol,
-			               &parameter->scope);
+			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) {
@@ -379,10 +407,28 @@ 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);
-	if (type->base.qualifiers != 0)
+	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);
 }
 
 /**
@@ -395,6 +441,16 @@ 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.
  *
@@ -435,7 +491,7 @@ 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);
 }
 
@@ -444,34 +500,34 @@ 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);
 }
 
 /**
@@ -485,35 +541,39 @@ static void print_type_enum(const enum_type_t *type)
 	print_type_qualifiers(type->base.qualifiers);
 	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);
+	}
 }
 
 /**
@@ -533,12 +593,12 @@ static void print_compound_type(const compound_type_t *type)
 		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);
 	}
 }
 
@@ -552,7 +612,7 @@ static void print_typedef_type_pre(const typedef_type_t *const type)
 	print_type_qualifiers(type->base.qualifiers);
 	if (type->base.qualifiers != 0)
 		fputc(' ', out);
-	fputs(type->declaration->symbol->string, out);
+	fputs(type->typedefe->base.symbol->string, out);
 }
 
 /**
@@ -564,7 +624,6 @@ 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);
@@ -612,6 +671,9 @@ 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;
@@ -643,6 +705,9 @@ 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;
@@ -662,6 +727,10 @@ 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);
+	}
 }
 
 /**
@@ -675,7 +744,7 @@ 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);
@@ -688,7 +757,7 @@ 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);
 	}
@@ -710,6 +779,7 @@ 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);
@@ -735,6 +805,7 @@ type_t *duplicate_type(const type_t *type)
 
 	type_t *copy = obstack_alloc(type_obst, size);
 	memcpy(copy, type, size);
+	copy->base.firm_type = NULL;
 
 	return copy;
 }
@@ -747,18 +818,15 @@ 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;
 
 	type_t *unqualified_type          = duplicate_type(type);
 	unqualified_type->base.qualifiers = TYPE_QUALIFIER_NONE;
 
-	type_t *result = typehash_insert(unqualified_type);
-	if (result != unqualified_type) {
-		obstack_free(type_obst, unqualified_type);
-	}
-
-	return result;
+	return identify_new_type(unqualified_type);
 }
 
 type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
@@ -786,11 +854,7 @@ type_t *get_qualified_type(type_t *orig_type, type_qualifiers_t const qual)
 		return type;
 	}
 
-	type = typehash_insert(copy);
-	if (type != copy)
-		obstack_free(type_obst, copy);
-
-	return type;
+	return identify_new_type(copy);
 }
 
 /**
@@ -931,9 +995,8 @@ bool is_type_arithmetic(const type_t *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);
 }
 
 /**
@@ -969,14 +1032,10 @@ 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
@@ -994,6 +1053,7 @@ 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;
@@ -1024,6 +1084,12 @@ 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;
@@ -1031,9 +1097,6 @@ 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 */
@@ -1112,6 +1175,12 @@ 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:
@@ -1145,38 +1214,41 @@ type_t *skip_typeref(type_t *type)
 {
 	type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
 	type_modifiers_t  modifiers  = TYPE_MODIFIER_NONE;
+	il_alignment_t    alignment  = 0;
 
 	while (true) {
+		if (alignment < type->base.alignment)
+			alignment = type->base.alignment;
+
 		switch (type->kind) {
 		case TYPE_ERROR:
 			return type;
 		case TYPE_TYPEDEF: {
 			qualifiers |= type->base.qualifiers;
 			modifiers  |= type->base.modifiers;
+
 			const typedef_type_t *typedef_type = &type->typedeft;
 			if (typedef_type->resolved_type != NULL) {
 				type = typedef_type->resolved_type;
 				break;
 			}
-			type = typedef_type->declaration->type;
+			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;
-			}
+		case TYPE_TYPEOF:
+			qualifiers |= type->base.qualifiers;
+			modifiers  |= type->base.modifiers;
+			type        = type->typeoft.typeof_type;
 			continue;
-		}
 		default:
 			break;
 		}
 		break;
 	}
 
-	if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
+	if (qualifiers != TYPE_QUALIFIER_NONE ||
+			modifiers  != TYPE_MODIFIER_NONE  ||
+			alignment  >  type->base.alignment) {
 		type_t *const copy = duplicate_type(type);
 
 		/* for const with typedefed array type the element type has to be
@@ -1186,21 +1258,53 @@ type_t *skip_typeref(type_t *type)
 			element_type                   = duplicate_type(element_type);
 			element_type->base.qualifiers |= qualifiers;
 			element_type->base.modifiers  |= modifiers;
+			element_type->base.alignment   = alignment;
 			copy->array.element_type       = element_type;
 		} else {
 			copy->base.qualifiers |= qualifiers;
 			copy->base.modifiers  |= modifiers;
+			copy->base.alignment   = alignment;
 		}
 
-		type = typehash_insert(copy);
-		if (type != copy) {
-			obstack_free(type_obst, copy);
-		}
+		type = identify_new_type(copy);
 	}
 
 	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:
+			type = type->typeoft.typeof_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);
@@ -1242,7 +1346,8 @@ atomic_type_kind_t get_uintptr_kind(void)
 /**
  * Find the atomic type kind representing a given size (signed).
  */
-atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
+atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size)
+{
 	static atomic_type_kind_t kinds[32];
 
 	assert(size < 32);
@@ -1255,7 +1360,7 @@ atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
 			ATOMIC_TYPE_LONG,
 			ATOMIC_TYPE_LONGLONG
 		};
-		for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
+		for (size_t i = 0; i < lengthof(possible_kinds); ++i) {
 			if (get_atomic_type_size(possible_kinds[i]) == size) {
 				kind = possible_kinds[i];
 				break;
@@ -1269,7 +1374,8 @@ atomic_type_kind_t find_signed_int_atomic_type_kind_for_size(unsigned size) {
 /**
  * Find the atomic type kind representing a given size (signed).
  */
-atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
+atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size)
+{
 	static atomic_type_kind_t kinds[32];
 
 	assert(size < 32);
@@ -1282,7 +1388,7 @@ atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
 			ATOMIC_TYPE_ULONG,
 			ATOMIC_TYPE_ULONGLONG
 		};
-		for(unsigned i = 0; i < sizeof(possible_kinds)/sizeof(possible_kinds[0]); ++i) {
+		for (size_t i = 0; i < lengthof(possible_kinds); ++i) {
 			if (get_atomic_type_size(possible_kinds[i]) == size) {
 				kind = possible_kinds[i];
 				break;
@@ -1297,7 +1403,7 @@ atomic_type_kind_t find_unsigned_int_atomic_type_kind_for_size(unsigned size) {
  * Hash the given type and return the "singleton" version
  * of it.
  */
-static type_t *identify_new_type(type_t *type)
+type_t *identify_new_type(type_t *type)
 {
 	type_t *result = typehash_insert(type);
 	if (result != type) {
@@ -1375,14 +1481,56 @@ 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)
 {