/*
* This file is part of cparser.
- * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
+ * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
#include <assert.h>
#include "type_t.h"
+#include "types.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"
+#include "warning.h"
+#include "diagnostic.h"
+#include "driver/firm_cmdline.h"
+
+/** The default calling convention. */
+cc_kind_t default_calling_convention = CC_CDECL;
static struct obstack _type_obst;
static FILE *out;
struct obstack *type_obst = &_type_obst;
-static int type_visited = 0;
static bool print_implicit_array_size = false;
-static void intern_print_type_pre(const type_t *type, bool top);
-static void intern_print_type_post(const type_t *type, bool top);
+static void intern_print_type_pre(const type_t *type);
+static void intern_print_type_post(const type_t *type);
typedef struct atomic_type_properties_t atomic_type_properties_t;
struct atomic_type_properties_t {
unsigned flags; /**< type flags from atomic_type_flag_t */
};
+/**
+ * Properties of atomic types.
+ */
static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
//ATOMIC_TYPE_INVALID = 0,
[ATOMIC_TYPE_VOID] = {
.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,
props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
props[ATOMIC_TYPE_LONGLONG].alignment = 4;
props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
+ if (firm_opt.os_support == OS_SUPPORT_MACHO) {
+ props[ATOMIC_TYPE_LONG_DOUBLE].size = 16;
+ props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 16;
+ }
/* 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)
out = stream;
}
-void inc_type_visited(void)
-{
- type_visited++;
-}
-
void print_type_qualifiers(type_qualifiers_t qualifiers)
{
int first = 1;
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";
* Print the first part (the prefix) of a type.
*
* @param type The type to print.
- * @param top true, if this is the top type, false if it's an embedded type.
*/
-static void print_function_type_pre(const function_type_t *type, bool top)
+static void print_function_type_pre(const function_type_t *type)
{
switch (type->linkage) {
case LINKAGE_INVALID:
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;
+ intern_print_type_pre(type->return_type);
+
+ cc_kind_t cc = type->calling_convention;
+restart:
+ switch (cc) {
+ 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:
+ if (default_calling_convention != CC_CDECL) {
+ /* show the default calling convention if its not cdecl */
+ cc = default_calling_convention;
+ goto restart;
+ }
+ break;
}
-
- /* don't emit parenthesis if we're the toplevel type... */
- if (!top)
- fputc('(', out);
}
/**
* Print the second part (the postfix) of a type.
*
* @param type The type to print.
- * @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 *parameters, bool top)
+ const scope_t *parameters)
{
- /* don't emit parenthesis if we're the toplevel type... */
- if (!top)
- fputc(')', out);
-
fputc('(', out);
bool first = true;
if (parameters == NULL) {
}
} else {
entity_t *parameter = parameters->entities;
- for( ; parameter != NULL; parameter = parameter->base.next) {
+ for (; parameter != NULL; parameter = parameter->base.next) {
+ if (parameter->kind != ENTITY_PARAMETER)
+ continue;
+
if (first) {
first = false;
} else {
fputs(", ", out);
}
- assert(is_declaration(parameter));
- print_type_ext(parameter->declaration.type, parameter->base.symbol,
- NULL);
+ 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) {
}
fputc(')', out);
- intern_print_type_post(type->return_type, false);
+ intern_print_type_post(type->return_type);
}
/**
*/
static void print_pointer_type_pre(const pointer_type_t *type)
{
- intern_print_type_pre(type->points_to, false);
+ type_t const *const points_to = type->points_to;
+ intern_print_type_pre(points_to);
+ if (points_to->kind == TYPE_ARRAY || points_to->kind == TYPE_FUNCTION)
+ fputs(" (", out);
variable_t *const variable = type->base_variable;
if (variable != NULL) {
fputs(" __based(", out);
fputs(") ", out);
}
fputc('*', out);
- print_type_qualifiers(type->base.qualifiers);
- if (type->base.qualifiers != 0)
+ 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.
+ * Prints the postfix part of a pointer type.
*
- * @param type The reference type.
+ * @param type The pointer type.
*/
-static void print_reference_type_pre(const reference_type_t *type)
+static void print_pointer_type_post(const pointer_type_t *type)
{
- intern_print_type_pre(type->refers_to, false);
- fputc('&', out);
+ type_t const *const points_to = type->points_to;
+ if (points_to->kind == TYPE_ARRAY || points_to->kind == TYPE_FUNCTION)
+ fputc(')', out);
+ intern_print_type_post(points_to);
}
/**
- * Prints the postfix part of a pointer type.
+ * Prints the prefix part of a reference type.
*
- * @param type The pointer type.
+ * @param type The reference type.
*/
-static void print_pointer_type_post(const pointer_type_t *type)
+static void print_reference_type_pre(const reference_type_t *type)
{
- intern_print_type_post(type->points_to, false);
+ type_t const *const refers_to = type->refers_to;
+ intern_print_type_pre(refers_to);
+ if (refers_to->kind == TYPE_ARRAY || refers_to->kind == TYPE_FUNCTION)
+ fputs(" (", out);
+ fputc('&', out);
}
/**
*/
static void print_reference_type_post(const reference_type_t *type)
{
- intern_print_type_post(type->refers_to, false);
+ type_t const *const refers_to = type->refers_to;
+ if (refers_to->kind == TYPE_ARRAY || refers_to->kind == TYPE_FUNCTION)
+ fputc(')', out);
+ intern_print_type_post(refers_to);
}
/**
*/
static void print_array_type_pre(const array_type_t *type)
{
- intern_print_type_pre(type->element_type, false);
+ intern_print_type_pre(type->element_type);
}
/**
print_expression(type->size_expression);
}
fputc(']', out);
- intern_print_type_post(type->element_type, false);
+ intern_print_type_post(type->element_type);
}
/**
{
fputs(" : ", out);
print_expression(type->size_expression);
- intern_print_type_post(type->base_type, false);
+ intern_print_type_post(type->base_type);
}
/**
{
fputs("typeof(", out);
if (type->expression != NULL) {
- assert(type->typeof_type == NULL);
print_expression(type->expression);
} else {
print_type(type->typeof_type);
* Prints the prefix part of a type.
*
* @param type The type.
- * @param top true if we print the toplevel type, false else.
*/
-static void intern_print_type_pre(const type_t *const type, const bool top)
+static void intern_print_type_pre(const type_t *const type)
{
switch(type->kind) {
case TYPE_ERROR:
fputs(type->builtin.symbol->string, out);
return;
case TYPE_FUNCTION:
- print_function_type_pre(&type->function, top);
+ print_function_type_pre(&type->function);
return;
case TYPE_POINTER:
print_pointer_type_pre(&type->pointer);
print_reference_type_pre(&type->reference);
return;
case TYPE_BITFIELD:
- intern_print_type_pre(type->bitfield.base_type, top);
+ intern_print_type_pre(type->bitfield.base_type);
return;
case TYPE_ARRAY:
print_array_type_pre(&type->array);
* Prints the postfix part of a type.
*
* @param type The type.
- * @param top true if we print the toplevel type, false else.
*/
-static void intern_print_type_post(const type_t *const type, const bool top)
+static void intern_print_type_post(const type_t *const type)
{
switch(type->kind) {
case TYPE_FUNCTION:
- print_function_type_post(&type->function, NULL, top);
+ print_function_type_post(&type->function, NULL);
return;
case TYPE_POINTER:
print_pointer_type_post(&type->pointer);
case TYPE_TYPEDEF:
break;
}
-
- if (type->base.modifiers & DM_TRANSPARENT_UNION) {
- fputs("__attribute__((__transparent_union__))", out);
- }
}
/**
return;
}
- intern_print_type_pre(type, true);
+ intern_print_type_pre(type);
if (symbol != NULL) {
fputc(' ', out);
fputs(symbol->string, out);
}
if (type->kind == TYPE_FUNCTION) {
- print_function_type_post(&type->function, parameters, true);
+ print_function_type_post(&type->function, parameters);
} else {
- intern_print_type_post(type, true);
+ intern_print_type_post(type);
}
}
*
* @param type The type.
*/
-static size_t get_type_size(const type_t *type)
+static size_t get_type_struct_size(const type_t *type)
{
switch(type->kind) {
case TYPE_ATOMIC: return sizeof(atomic_type_t);
*/
type_t *duplicate_type(const type_t *type)
{
- size_t size = get_type_size(type);
+ size_t size = get_type_struct_size(type);
type_t *copy = obstack_alloc(type_obst, size);
memcpy(copy, type, size);
+ copy->base.firm_type = NULL;
return copy;
}
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)
return type;
}
- type = typehash_insert(copy);
- if (type != copy)
- obstack_free(type_obst, copy);
-
- return type;
+ return identify_new_type(copy);
}
/**
return !is_type_function(type) && !is_type_incomplete(type);
}
+bool is_builtin_va_list(type_t *type)
+{
+ type_t *tp = skip_typeref(type);
+
+ return tp->kind == type_valist->kind &&
+ tp->builtin.symbol == type_valist->builtin.symbol;
+}
+
/**
* Check if two function types are compatible.
*/
if (func1->linkage != func2->linkage)
return false;
- if (func1->calling_convention != func2->calling_convention)
+ 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;
/* can parameters be compared? */
}
case TYPE_COMPOUND_STRUCT:
- case TYPE_COMPOUND_UNION:
+ case TYPE_COMPOUND_UNION: {
+
+
+ break;
+ }
case TYPE_ENUM:
case TYPE_BUILTIN:
/* TODO: not implemented */
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) {
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;
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;
+ type = type->typeoft.typeof_type;
continue;
- }
default:
break;
}
break;
}
- if (qualifiers != TYPE_QUALIFIER_NONE || modifiers != TYPE_MODIFIER_NONE) {
+ if (qualifiers != TYPE_QUALIFIER_NONE) {
type_t *const copy = duplicate_type(type);
/* for const with typedefed array type the element type has to be
type_t *element_type = copy->array.element_type;
element_type = duplicate_type(element_type);
element_type->base.qualifiers |= qualifiers;
- element_type->base.modifiers |= modifiers;
copy->array.element_type = element_type;
} else {
copy->base.qualifiers |= qualifiers;
- copy->base.modifiers |= modifiers;
}
- 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) {
+unsigned get_type_size(type_t *type)
+{
+ switch (type->kind) {
+ case TYPE_INVALID:
+ break;
+ case TYPE_ERROR:
+ return 0;
+ case TYPE_ATOMIC:
+ return get_atomic_type_size(type->atomic.akind);
+ case TYPE_COMPLEX:
+ return get_atomic_type_size(type->complex.akind) * 2;
+ case TYPE_IMAGINARY:
+ return get_atomic_type_size(type->imaginary.akind);
+ case TYPE_COMPOUND_UNION:
+ layout_union_type(&type->compound);
+ return type->compound.compound->size;
+ case TYPE_COMPOUND_STRUCT:
+ layout_struct_type(&type->compound);
+ return type->compound.compound->size;
+ case TYPE_ENUM:
+ return get_atomic_type_size(type->enumt.akind);
+ case TYPE_FUNCTION:
+ return 0; /* non-const (but "address-const") */
+ case TYPE_REFERENCE:
+ case TYPE_POINTER:
+ /* TODO: make configurable by backend */
+ return 4;
+ case TYPE_ARRAY: {
+ /* TODO: correct if element_type is aligned? */
+ il_size_t element_size = get_type_size(type->array.element_type);
+ return type->array.size * element_size;
+ }
+ case TYPE_BITFIELD:
+ return 0;
+ case TYPE_BUILTIN:
+ return get_type_size(type->builtin.real_type);
+ case TYPE_TYPEDEF:
+ return get_type_size(type->typedeft.typedefe->type);
+ case TYPE_TYPEOF:
+ if (type->typeoft.typeof_type) {
+ return get_type_size(type->typeoft.typeof_type);
+ } else {
+ return get_type_size(type->typeoft.expression->base.type);
+ }
+ }
+ panic("invalid type in get_type_size");
+}
+
+unsigned get_type_alignment(type_t *type)
+{
+ switch (type->kind) {
+ case TYPE_INVALID:
+ break;
+ case TYPE_ERROR:
+ return 0;
+ case TYPE_ATOMIC:
+ return get_atomic_type_alignment(type->atomic.akind);
+ case TYPE_COMPLEX:
+ return get_atomic_type_alignment(type->complex.akind);
+ case TYPE_IMAGINARY:
+ return get_atomic_type_alignment(type->imaginary.akind);
+ case TYPE_COMPOUND_UNION:
+ layout_union_type(&type->compound);
+ return type->compound.compound->alignment;
+ case TYPE_COMPOUND_STRUCT:
+ layout_struct_type(&type->compound);
+ return type->compound.compound->alignment;
+ case TYPE_ENUM:
+ return get_atomic_type_alignment(type->enumt.akind);
+ case TYPE_FUNCTION:
+ /* what is correct here? */
+ return 4;
+ case TYPE_REFERENCE:
+ case TYPE_POINTER:
+ /* TODO: make configurable by backend */
+ return 4;
+ case TYPE_ARRAY:
+ return get_type_alignment(type->array.element_type);
+ case TYPE_BITFIELD:
+ return 0;
+ case TYPE_BUILTIN:
+ return get_type_alignment(type->builtin.real_type);
+ case TYPE_TYPEDEF: {
+ il_alignment_t alignment
+ = get_type_alignment(type->typedeft.typedefe->type);
+ if (type->typedeft.typedefe->alignment > alignment)
+ alignment = type->typedeft.typedefe->alignment;
+
+ return alignment;
+ }
+ case TYPE_TYPEOF:
+ if (type->typeoft.typeof_type) {
+ return get_type_alignment(type->typeoft.typeof_type);
+ } else {
+ return get_type_alignment(type->typeoft.expression->base.type);
+ }
+ }
+ panic("invalid type in get_type_alignment");
+}
+
+decl_modifiers_t get_type_modifiers(const type_t *type)
+{
+ switch(type->kind) {
+ case TYPE_INVALID:
+ case TYPE_ERROR:
+ break;
+ case TYPE_COMPOUND_STRUCT:
+ case TYPE_COMPOUND_UNION:
+ return type->compound.compound->modifiers;
+ case TYPE_FUNCTION:
+ return type->function.modifiers;
+ case TYPE_ENUM:
+ case TYPE_ATOMIC:
+ case TYPE_COMPLEX:
+ case TYPE_IMAGINARY:
+ case TYPE_REFERENCE:
+ case TYPE_POINTER:
+ case TYPE_BITFIELD:
+ case TYPE_ARRAY:
+ return 0;
+ case TYPE_BUILTIN:
+ return get_type_modifiers(type->builtin.real_type);
+ case TYPE_TYPEDEF: {
+ decl_modifiers_t modifiers = type->typedeft.typedefe->modifiers;
+ modifiers |= get_type_modifiers(type->typedeft.typedefe->type);
+ return modifiers;
+ }
+ case TYPE_TYPEOF:
+ if (type->typeoft.typeof_type) {
+ return get_type_modifiers(type->typeoft.typeof_type);
+ } else {
+ return get_type_modifiers(type->typeoft.expression->base.type);
+ }
+ }
+ panic("invalid type found in get_type_modifiers");
+}
+
+type_qualifiers_t get_type_qualifier(const type_t *type, bool skip_array_type)
+{
type_qualifiers_t qualifiers = TYPE_QUALIFIER_NONE;
while (true) {
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;
- }
+ case TYPE_TYPEOF:
+ type = type->typeoft.typeof_type;
continue;
- }
case TYPE_ARRAY:
if (skip_array_type) {
type = type->array.element_type;
/**
* 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);
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;
/**
* 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);
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;
* 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) {
memset(type, 0, sizeof(atomic_type_t));
type->kind = TYPE_ATOMIC;
- type->base.size = get_atomic_type_size(akind);
- type->base.alignment = get_atomic_type_alignment(akind);
type->base.qualifiers = qualifiers;
type->atomic.akind = akind;
type->kind = TYPE_COMPLEX;
type->base.qualifiers = qualifiers;
- type->base.alignment = get_atomic_type_alignment(akind);
type->complex.akind = akind;
return identify_new_type(type);
type->kind = TYPE_IMAGINARY;
type->base.qualifiers = qualifiers;
- type->base.alignment = get_atomic_type_alignment(akind);
type->imaginary.akind = akind;
return identify_new_type(type);
type->kind = TYPE_POINTER;
type->base.qualifiers = qualifiers;
- type->base.alignment = 0;
type->pointer.points_to = points_to;
type->pointer.base_variable = NULL;
type->kind = TYPE_REFERENCE;
type->base.qualifiers = 0;
- type->base.alignment = 0;
type->reference.refers_to = refers_to;
return identify_new_type(type);
type->kind = TYPE_POINTER;
type->base.qualifiers = qualifiers;
- type->base.alignment = 0;
type->pointer.points_to = points_to;
type->pointer.base_variable = variable;
type->kind = TYPE_ARRAY;
type->base.qualifiers = qualifiers;
- type->base.alignment = 0;
type->array.element_type = element_type;
type->array.size = size;
type->array.size_constant = true;
return identify_new_type(type);
}
+static entity_t *pack_bitfield_members(il_size_t *struct_offset,
+ il_alignment_t *struct_alignment,
+ bool packed, entity_t *first)
+{
+ il_size_t offset = *struct_offset;
+ il_alignment_t alignment = *struct_alignment;
+ size_t bit_offset = 0;
+
+ entity_t *member;
+ for (member = first; member != NULL; member = member->base.next) {
+ if (member->kind != ENTITY_COMPOUND_MEMBER)
+ break;
+
+ type_t *type = member->declaration.type;
+ if (type->kind != TYPE_BITFIELD)
+ break;
+
+ type_t *base_type = skip_typeref(type->bitfield.base_type);
+ il_alignment_t base_alignment = get_type_alignment(base_type);
+ il_alignment_t alignment_mask = base_alignment-1;
+ if (base_alignment > alignment)
+ alignment = base_alignment;
+
+ size_t bit_size = type->bitfield.bit_size;
+ if (!packed) {
+ bit_offset += (offset & alignment_mask) * BITS_PER_BYTE;
+ offset &= ~alignment_mask;
+ size_t base_size = get_type_size(base_type) * BITS_PER_BYTE;
+
+ if (bit_offset + bit_size > base_size || bit_size == 0) {
+ offset += (bit_offset+BITS_PER_BYTE-1) / BITS_PER_BYTE;
+ offset = (offset + base_alignment-1) & ~alignment_mask;
+ bit_offset = 0;
+ }
+ }
+
+ member->compound_member.offset = offset;
+ member->compound_member.bit_offset = bit_offset;
+
+ bit_offset += bit_size;
+ offset += bit_offset / BITS_PER_BYTE;
+ bit_offset %= BITS_PER_BYTE;
+ }
+
+ if (bit_offset > 0)
+ offset += 1;
+
+ *struct_offset = offset;
+ *struct_alignment = alignment;
+
+ return member;
+}
+
+/**
+ * Finish the construction of a struct type by calculating its size, offsets,
+ * alignment.
+ */
+void layout_struct_type(compound_type_t *type)
+{
+ assert(type->compound != NULL);
+
+ compound_t *compound = type->compound;
+ if (!compound->complete)
+ return;
+ if (type->compound->layouted)
+ return;
+
+ il_size_t offset = 0;
+ il_alignment_t alignment = compound->alignment;
+ bool need_pad = false;
+
+ entity_t *entry = compound->members.entities;
+ while (entry != NULL) {
+ if (entry->kind != ENTITY_COMPOUND_MEMBER) {
+ entry = entry->base.next;
+ continue;
+ }
+
+ type_t *m_type = entry->declaration.type;
+ type_t *skipped = skip_typeref(m_type);
+ if (! is_type_valid(skipped)) {
+ entry = entry->base.next;
+ continue;
+ }
+
+ if (skipped->kind == TYPE_BITFIELD) {
+ entry = pack_bitfield_members(&offset, &alignment,
+ compound->packed, entry);
+ continue;
+ }
+
+ il_alignment_t m_alignment = get_type_alignment(m_type);
+ if (m_alignment > alignment)
+ alignment = m_alignment;
+
+ if (!compound->packed) {
+ il_size_t new_offset = (offset + m_alignment-1) & -m_alignment;
+
+ if (new_offset > offset) {
+ need_pad = true;
+ offset = new_offset;
+ }
+ }
+
+ entry->compound_member.offset = offset;
+ offset += get_type_size(m_type);
+
+ entry = entry->base.next;
+ }
+
+ if (!compound->packed) {
+ il_size_t new_offset = (offset + alignment-1) & -alignment;
+ if (new_offset > offset) {
+ need_pad = true;
+ offset = new_offset;
+ }
+ }
+
+ if (need_pad) {
+ if (warning.padded) {
+ warningf(&compound->base.source_position, "'%T' needs padding",
+ type);
+ }
+ } else if (compound->packed && warning.packed) {
+ warningf(&compound->base.source_position,
+ "superfluous packed attribute on '%T'", type);
+ }
+
+ compound->size = offset;
+ compound->alignment = alignment;
+ compound->layouted = true;
+}
+
+/**
+ * Finish the construction of an union type by calculating
+ * its size and alignment.
+ */
+void layout_union_type(compound_type_t *type)
+{
+ assert(type->compound != NULL);
+
+ compound_t *compound = type->compound;
+ if (! compound->complete)
+ return;
+
+ il_size_t size = 0;
+ il_alignment_t alignment = compound->alignment;
+
+ entity_t *entry = compound->members.entities;
+ for (; entry != NULL; entry = entry->base.next) {
+ if (entry->kind != ENTITY_COMPOUND_MEMBER)
+ continue;
+
+ type_t *m_type = entry->declaration.type;
+ if (! is_type_valid(skip_typeref(m_type)))
+ continue;
+
+ entry->compound_member.offset = 0;
+ il_size_t m_size = get_type_size(m_type);
+ if (m_size > size)
+ size = m_size;
+ il_alignment_t m_alignment = get_type_alignment(m_type);
+ if (m_alignment > alignment)
+ alignment = m_alignment;
+ }
+ size = (size + alignment - 1) & -alignment;
+
+ compound->size = size;
+ compound->alignment = alignment;
+}
+
/**
* Debug helper. Prints the given type to stdout.
*/
projects / cparser / blobdiff