/*
* 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 "printer.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);
unsigned flags; /**< type flags from atomic_type_flag_t */
};
+/**
+ * Returns the size of a type node.
+ *
+ * @param kind the type kind
+ */
+static size_t get_type_struct_size(type_kind_t kind)
+{
+ static const size_t sizes[] = {
+ [TYPE_ATOMIC] = sizeof(atomic_type_t),
+ [TYPE_COMPLEX] = sizeof(complex_type_t),
+ [TYPE_IMAGINARY] = sizeof(imaginary_type_t),
+ [TYPE_BITFIELD] = sizeof(bitfield_type_t),
+ [TYPE_COMPOUND_STRUCT] = sizeof(compound_type_t),
+ [TYPE_COMPOUND_UNION] = sizeof(compound_type_t),
+ [TYPE_ENUM] = sizeof(enum_type_t),
+ [TYPE_FUNCTION] = sizeof(function_type_t),
+ [TYPE_POINTER] = sizeof(pointer_type_t),
+ [TYPE_ARRAY] = sizeof(array_type_t),
+ [TYPE_TYPEDEF] = sizeof(typedef_type_t),
+ [TYPE_TYPEOF] = sizeof(typeof_type_t),
+ };
+ assert(lengthof(sizes) == (int)TYPE_TYPEOF + 1);
+ assert(kind <= TYPE_TYPEOF);
+ assert(sizes[kind] != 0);
+ return sizes[kind];
+}
+
+type_t *allocate_type_zero(type_kind_t kind)
+{
+ size_t size = get_type_struct_size(kind);
+ type_t *res = obstack_alloc(type_obst, size);
+ memset(res, 0, size);
+ res->base.kind = kind;
+
+ return res;
+}
+
+/**
+ * Properties of atomic types.
+ */
static atomic_type_properties_t atomic_type_properties[ATOMIC_TYPE_LAST+1] = {
//ATOMIC_TYPE_INVALID = 0,
[ATOMIC_TYPE_VOID] = {
}
unsigned int_size = machine_size < 32 ? 2 : 4;
- unsigned long_size = machine_size < 64 ? 4 : 8;
+ /* long is always 32bit on windows */
+ unsigned long_size = c_mode & _MS ? 4 : (machine_size < 64 ? 4 : 8);
unsigned llong_size = machine_size < 32 ? 4 : 8;
props[ATOMIC_TYPE_INT].size = int_size;
/* TODO: backend specific, need a way to query the backend for this.
* The following are good settings for x86 */
- props[ATOMIC_TYPE_FLOAT].alignment = 4;
- props[ATOMIC_TYPE_DOUBLE].alignment = 4;
- props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
- props[ATOMIC_TYPE_LONGLONG].alignment = 4;
- props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
+ if (machine_size <= 32) {
+ props[ATOMIC_TYPE_FLOAT].alignment = 4;
+ props[ATOMIC_TYPE_DOUBLE].alignment = 4;
+ props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 4;
+ props[ATOMIC_TYPE_LONGLONG].alignment = 4;
+ props[ATOMIC_TYPE_ULONGLONG].alignment = 4;
+ } else {
+ props[ATOMIC_TYPE_FLOAT].alignment = 4;
+ props[ATOMIC_TYPE_DOUBLE].alignment = 8;
+ props[ATOMIC_TYPE_LONG_DOUBLE].alignment = 8;
+ props[ATOMIC_TYPE_LONGLONG].alignment = 8;
+ props[ATOMIC_TYPE_ULONGLONG].alignment = 8;
+ }
+ if (force_long_double_size > 0) {
+ props[ATOMIC_TYPE_LONG_DOUBLE].size = force_long_double_size;
+ props[ATOMIC_TYPE_LONG_DOUBLE].alignment = force_long_double_size;
+ }
/* TODO: make this configurable for platforms which do not use byte sized
* bools. */
obstack_free(type_obst, NULL);
}
-void type_set_output(FILE *stream)
-{
- out = stream;
-}
-
-void inc_type_visited(void)
+void print_type_qualifiers(type_qualifiers_t const qualifiers, QualifierSeparators const q)
{
- type_visited++;
-}
-
-void print_type_qualifiers(type_qualifiers_t qualifiers)
-{
- int first = 1;
+ size_t sep = q & QUAL_SEP_START ? 0 : 1;
if (qualifiers & TYPE_QUALIFIER_CONST) {
- fputs(" const" + first, out);
- first = 0;
+ print_string(" const" + sep);
+ sep = 0;
}
if (qualifiers & TYPE_QUALIFIER_VOLATILE) {
- fputs(" volatile" + first, out);
- first = 0;
+ print_string(" volatile" + sep);
+ sep = 0;
}
if (qualifiers & TYPE_QUALIFIER_RESTRICT) {
- fputs(" restrict" + first, out);
- first = 0;
+ print_string(" restrict" + sep);
+ sep = 0;
}
+ if (sep == 0 && q & QUAL_SEP_END)
+ print_char(' ');
}
const char *get_atomic_kind_name(atomic_type_kind_t kind)
static void print_atomic_kinds(atomic_type_kind_t kind)
{
const char *s = get_atomic_kind_name(kind);
- fputs(s, out);
+ print_string(s);
}
/**
*/
static void print_atomic_type(const atomic_type_t *type)
{
- print_type_qualifiers(type->base.qualifiers);
- if (type->base.qualifiers != 0)
- fputc(' ', out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
print_atomic_kinds(type->akind);
}
*
* @param type The type.
*/
-static
-void print_complex_type(const complex_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 " + empty, out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
+ print_string("_Complex");
print_atomic_kinds(type->akind);
}
*
* @param type The type.
*/
-static
-void print_imaginary_type(const imaginary_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 " + empty, out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
+ print_string("_Imaginary ");
print_atomic_kinds(type->akind);
}
case LINKAGE_C:
if (c_mode & _CXX)
- fputs("extern \"C\" ", out);
+ print_string("extern \"C\" ");
break;
case LINKAGE_CXX:
if (!(c_mode & _CXX))
- fputs("extern \"C++\" ", out);
+ print_string("extern \"C++\" ");
break;
}
- print_type_qualifiers(type->base.qualifiers);
- if (type->base.qualifiers != 0)
- fputc(' ', out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
intern_print_type_pre(type->return_type);
- 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;
+ cc_kind_t cc = type->calling_convention;
+restart:
+ switch (cc) {
+ case CC_CDECL: print_string(" __cdecl"); break;
+ case CC_STDCALL: print_string(" __stdcall"); break;
+ case CC_FASTCALL: print_string(" __fastcall"); break;
+ case CC_THISCALL: print_string(" __thiscall"); 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;
}
}
static void print_function_type_post(const function_type_t *type,
const scope_t *parameters)
{
- fputc('(', out);
+ print_string("(");
bool first = true;
if (parameters == NULL) {
function_parameter_t *parameter = type->parameters;
if (first) {
first = false;
} else {
- fputs(", ", out);
+ print_string(", ");
}
print_type(parameter->type);
}
if (first) {
first = false;
} else {
- fputs(", ", out);
+ print_string(", ");
}
const type_t *const type = parameter->declaration.type;
if (type == NULL) {
- fputs(parameter->base.symbol->string, out);
+ print_string(parameter->base.symbol->string);
} else {
print_type_ext(type, parameter->base.symbol, NULL);
}
if (first) {
first = false;
} else {
- fputs(", ", out);
+ print_string(", ");
}
- fputs("...", out);
+ print_string("...");
}
if (first && !type->unspecified_parameters) {
- fputs("void", out);
+ print_string("void");
}
- fputc(')', out);
+ print_string(")");
intern_print_type_post(type->return_type);
}
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);
+ print_string(" (");
variable_t *const variable = type->base_variable;
if (variable != NULL) {
- fputs(" __based(", out);
- fputs(variable->base.base.symbol->string, out);
- fputs(") ", out);
+ print_string(" __based(");
+ print_string(variable->base.base.symbol->string);
+ print_string(") ");
}
- fputc('*', out);
- type_qualifiers_t const qual = type->base.qualifiers;
- if (qual != 0)
- fputc(' ', out);
- print_type_qualifiers(qual);
+ print_string("*");
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_START);
}
/**
{
type_t const *const points_to = type->points_to;
if (points_to->kind == TYPE_ARRAY || points_to->kind == TYPE_FUNCTION)
- fputc(')', out);
+ print_string(")");
intern_print_type_post(points_to);
}
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);
+ print_string(" (");
+ print_string("&");
}
/**
{
type_t const *const refers_to = type->refers_to;
if (refers_to->kind == TYPE_ARRAY || refers_to->kind == TYPE_FUNCTION)
- fputc(')', out);
+ print_string(")");
intern_print_type_post(refers_to);
}
*/
static void print_array_type_post(const array_type_t *type)
{
- fputc('[', out);
+ print_string("[");
if (type->is_static) {
- fputs("static ", out);
+ print_string("static ");
}
- print_type_qualifiers(type->base.qualifiers);
- if (type->base.qualifiers != 0)
- fputc(' ', out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
if (type->size_expression != NULL
&& (print_implicit_array_size || !type->has_implicit_size)) {
print_expression(type->size_expression);
}
- fputc(']', out);
+ print_string("]");
intern_print_type_post(type->element_type);
}
*/
static void print_bitfield_type_post(const bitfield_type_t *type)
{
- fputs(" : ", out);
+ print_string(" : ");
print_expression(type->size_expression);
intern_print_type_post(type->base_type);
}
*/
void print_enum_definition(const enum_t *enume)
{
- fputs("{\n", out);
+ print_string("{\n");
change_indent(1);
entry = entry->base.next) {
print_indent();
- fputs(entry->base.symbol->string, out);
+ print_string(entry->base.symbol->string);
if (entry->enum_value.value != NULL) {
- fputs(" = ", out);
+ print_string(" = ");
/* skip the implicit cast */
expression_t *expression = entry->enum_value.value;
}
print_expression(expression);
}
- fputs(",\n", out);
+ print_string(",\n");
}
change_indent(-1);
print_indent();
- fputc('}', out);
+ print_string("}");
}
/**
*/
static void print_type_enum(const enum_type_t *type)
{
- int empty = type->base.qualifiers == 0;
- print_type_qualifiers(type->base.qualifiers);
- fputs(" enum " + empty, out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
+ print_string("enum ");
enum_t *enume = type->enume;
symbol_t *symbol = enume->base.symbol;
if (symbol != NULL) {
- fputs(symbol->string, out);
+ print_string(symbol->string);
} else {
print_enum_definition(enume);
}
*/
void print_compound_definition(const compound_t *compound)
{
- fputs("{\n", out);
+ print_string("{\n");
change_indent(1);
entity_t *entity = compound->members.entities;
print_indent();
print_entity(entity);
- fputc('\n', out);
+ print_string("\n");
}
change_indent(-1);
print_indent();
- fputc('}', out);
+ print_string("}");
if (compound->modifiers & DM_TRANSPARENT_UNION) {
- fputs("__attribute__((__transparent_union__))", out);
+ print_string("__attribute__((__transparent_union__))");
}
}
*/
static void print_compound_type(const compound_type_t *type)
{
- int empty = type->base.qualifiers == 0;
- print_type_qualifiers(type->base.qualifiers);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
if (type->base.kind == TYPE_COMPOUND_STRUCT) {
- fputs(" struct " + empty, out);
+ print_string("struct ");
} else {
assert(type->base.kind == TYPE_COMPOUND_UNION);
- fputs(" union " + empty, out);
+ print_string("union ");
}
compound_t *compound = type->compound;
symbol_t *symbol = compound->base.symbol;
if (symbol != NULL) {
- fputs(symbol->string, out);
+ print_string(symbol->string);
} else {
print_compound_definition(compound);
}
*/
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->typedefe->base.symbol->string, out);
+ print_type_qualifiers(type->base.qualifiers, QUAL_SEP_END);
+ print_string(type->typedefe->base.symbol->string);
}
/**
*/
static void print_typeof_type_pre(const typeof_type_t *const type)
{
- fputs("typeof(", out);
+ print_string("typeof(");
if (type->expression != NULL) {
print_expression(type->expression);
} else {
print_type(type->typeof_type);
}
- fputc(')', out);
+ print_string(")");
}
/**
{
switch(type->kind) {
case TYPE_ERROR:
- fputs("<error>", out);
+ print_string("<error>");
return;
case TYPE_INVALID:
- fputs("<invalid>", out);
+ print_string("<invalid>");
return;
case TYPE_ENUM:
print_type_enum(&type->enumt);
case TYPE_COMPOUND_UNION:
print_compound_type(&type->compound);
return;
- case TYPE_BUILTIN:
- fputs(type->builtin.symbol->string, out);
- return;
case TYPE_FUNCTION:
print_function_type_pre(&type->function);
return;
print_typeof_type_pre(&type->typeoft);
return;
}
- fputs("unknown", out);
+ print_string("unknown");
}
/**
case TYPE_ENUM:
case TYPE_COMPOUND_STRUCT:
case TYPE_COMPOUND_UNION:
- case TYPE_BUILTIN:
case TYPE_TYPEOF:
case TYPE_TYPEDEF:
break;
}
-
- if (type->base.modifiers & DM_TRANSPARENT_UNION) {
- fputs("__attribute__((__transparent_union__))", out);
- }
}
/**
void print_type_ext(const type_t *const type, const symbol_t *symbol,
const scope_t *parameters)
{
- if (type == NULL) {
- fputs("nil type", out);
- return;
- }
-
intern_print_type_pre(type);
if (symbol != NULL) {
- fputc(' ', out);
- fputs(symbol->string, out);
+ print_string(" ");
+ print_string(symbol->string);
}
if (type->kind == TYPE_FUNCTION) {
print_function_type_post(&type->function, parameters);
}
}
-/**
- * Return the size of a type AST node.
- *
- * @param type The type.
- */
-static size_t get_type_size(const type_t *type)
-{
- switch(type->kind) {
- case TYPE_ATOMIC: return sizeof(atomic_type_t);
- case TYPE_COMPLEX: return sizeof(complex_type_t);
- case TYPE_IMAGINARY: return sizeof(imaginary_type_t);
- case TYPE_COMPOUND_STRUCT:
- case TYPE_COMPOUND_UNION: return sizeof(compound_type_t);
- 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);
- case TYPE_TYPEOF: return sizeof(typeof_type_t);
- case TYPE_BITFIELD: return sizeof(bitfield_type_t);
- case TYPE_ERROR: panic("error type found");
- case TYPE_INVALID: panic("invalid type found");
- }
- panic("unknown type found");
-}
-
/**
* Duplicates a type.
*
*/
type_t *duplicate_type(const type_t *type)
{
- size_t size = get_type_size(type);
+ size_t size = get_type_struct_size(type->kind);
type_t *copy = obstack_alloc(type_obst, size);
memcpy(copy, type, size);
{
assert(!is_typeref(type));
- switch (type->kind) {
- case TYPE_POINTER: return true;
- case TYPE_BUILTIN: return is_type_scalar(type->builtin.real_type);
- default: break;
- }
+ if (type->kind == TYPE_POINTER)
+ return true;
return is_type_arithmetic(type);
}
case TYPE_FUNCTION:
case TYPE_POINTER:
case TYPE_REFERENCE:
- case TYPE_BUILTIN:
case TYPE_ERROR:
return false;
if (func1->linkage != func2->linkage)
return false;
- if (func1->calling_convention != func2->calling_convention)
- 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;
- /* can parameters be compared? */
- if (func1->unspecified_parameters || func2->unspecified_parameters)
- return true;
+ 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 */
}
case TYPE_COMPOUND_STRUCT:
- case TYPE_COMPOUND_UNION:
+ case TYPE_COMPOUND_UNION: {
+
+
+ break;
+ }
case TYPE_ENUM:
- case TYPE_BUILTIN:
/* TODO: not implemented */
break;
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) {
}
case TYPE_TYPEOF:
qualifiers |= type->base.qualifiers;
- modifiers |= type->base.modifiers;
type = type->typeoft.typeof_type;
continue;
default:
break;
}
- if (qualifiers != TYPE_QUALIFIER_NONE ||
- modifiers != TYPE_MODIFIER_NONE ||
- alignment > type->base.alignment) {
+ 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;
- 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 = identify_new_type(copy);
return 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_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_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_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;
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)
+ continue;
+
+ 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;
+ }
+ }
+
+ if (byte_order_big_endian) {
+ size_t base_size = get_type_size(base_type) * BITS_PER_BYTE;
+ member->compound_member.offset = offset & ~alignment_mask;
+ member->compound_member.bit_offset = base_size - bit_offset - bit_size;
+ } else {
+ 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;
+}
+
+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;
+}
+
+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;
+}
+
+static function_parameter_t *allocate_parameter(type_t *const type)
+{
+ function_parameter_t *const param
+ = obstack_alloc(type_obst, sizeof(*param));
+ memset(param, 0, sizeof(*param));
+ param->type = type;
+ return param;
+}
+
+type_t *make_function_2_type(type_t *return_type, type_t *argument_type1,
+ type_t *argument_type2)
+{
+ function_parameter_t *const parameter2 = allocate_parameter(argument_type2);
+ function_parameter_t *const parameter1 = allocate_parameter(argument_type1);
+ parameter1->next = parameter2;
+
+ type_t *type = allocate_type_zero(TYPE_FUNCTION);
+ type->function.return_type = return_type;
+ type->function.parameters = parameter1;
+ type->function.linkage = LINKAGE_C;
+
+ return identify_new_type(type);
+}
+
+type_t *make_function_1_type(type_t *return_type, type_t *argument_type)
+{
+ function_parameter_t *const parameter = allocate_parameter(argument_type);
+
+ type_t *type = allocate_type_zero(TYPE_FUNCTION);
+ type->function.return_type = return_type;
+ type->function.parameters = parameter;
+ type->function.linkage = LINKAGE_C;
+
+ return identify_new_type(type);
+}
+
+type_t *make_function_1_type_variadic(type_t *return_type,
+ type_t *argument_type)
+{
+ function_parameter_t *const parameter = allocate_parameter(argument_type);
+
+ type_t *type = allocate_type_zero(TYPE_FUNCTION);
+ type->function.return_type = return_type;
+ type->function.parameters = parameter;
+ type->function.variadic = true;
+ type->function.linkage = LINKAGE_C;
+
+ return identify_new_type(type);
+}
+
+type_t *make_function_0_type(type_t *return_type)
+{
+ type_t *type = allocate_type_zero(TYPE_FUNCTION);
+ type->function.return_type = return_type;
+ type->function.parameters = NULL;
+ type->function.linkage = LINKAGE_C;
+
+ return identify_new_type(type);
+}
+
+type_t *make_function_type(type_t *return_type, int n_types,
+ type_t *const *argument_types,
+ decl_modifiers_t modifiers)
+{
+ type_t *type = allocate_type_zero(TYPE_FUNCTION);
+ type->function.return_type = return_type;
+ type->function.modifiers |= modifiers;
+ type->function.linkage = LINKAGE_C;
+
+ function_parameter_t *last = NULL;
+ for (int i = 0; i < n_types; ++i) {
+ function_parameter_t *parameter = allocate_parameter(argument_types[i]);
+ if (last == NULL) {
+ type->function.parameters = parameter;
+ } else {
+ last->next = parameter;
+ }
+ last = parameter;
+ }
+
+ return identify_new_type(type);
+}
+
/**
* Debug helper. Prints the given type to stdout.
*/
static __attribute__((unused))
void dbg_type(const type_t *type)
{
- FILE *old_out = out;
- out = stderr;
+ print_to_file(stderr);
print_type(type);
- puts("\n");
+ print_string("\n");
fflush(stderr);
- out = old_out;
}
projects / cparser / blobdiff