/*
* 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 "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);
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. */
out = stream;
}
-void inc_type_visited(void)
-{
- type_visited++;
-}
-
void print_type_qualifiers(type_qualifiers_t qualifiers)
{
int first = 1;
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: 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;
}
}
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 */
return type;
}
-unsigned get_type_size(const type_t *type)
+unsigned get_type_size(type_t *type)
{
switch (type->kind) {
case TYPE_INVALID:
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);
panic("invalid type in get_type_size");
}
-unsigned get_type_alignment(const type_t *type)
+unsigned get_type_alignment(type_t *type)
{
switch (type->kind) {
case TYPE_INVALID:
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);
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