namespace v8 {
namespace internal {
-// static
-ZoneTypeConfig::Tagged* ZoneTypeConfig::tagged_create(
- Tag tag, int size, Zone* zone) {
- Tagged* tagged = new(zone) Tagged(size + 1, zone);
- tagged->Add(reinterpret_cast<void*>(tag), zone);
- tagged->AddBlock(NULL, size, zone);
- return tagged;
-}
-
-
-// static
-void ZoneTypeConfig::tagged_shrink(Tagged* tagged, int size) {
- tagged->Rewind(size + 1);
-}
-
-
-// static
-ZoneTypeConfig::Tag ZoneTypeConfig::tagged_tag(Tagged* tagged) {
- return static_cast<Tag>(reinterpret_cast<intptr_t>(tagged->at(0)));
-}
-
-
-// static
-template<class T>
-T ZoneTypeConfig::tagged_get(Tagged* tagged, int i) {
- return reinterpret_cast<T>(tagged->at(i + 1));
-}
-
-
-// static
-template<class T>
-void ZoneTypeConfig::tagged_set(Tagged* tagged, int i, T value) {
- tagged->at(i + 1) = reinterpret_cast<void*>(value);
-}
-
-
-// static
-int ZoneTypeConfig::tagged_length(Tagged* tagged) {
- return tagged->length() - 1;
-}
-
-
// static
Type* ZoneTypeConfig::handle(Type* type) {
return type;
}
-// static
-bool ZoneTypeConfig::is(Type* type, Tag tag) {
- return is_tagged(type) && tagged_tag(as_tagged(type)) == tag;
-}
-
-
// static
bool ZoneTypeConfig::is_bitset(Type* type) {
return reinterpret_cast<intptr_t>(type) & 1;
// static
-bool ZoneTypeConfig::is_tagged(Type* type) {
+bool ZoneTypeConfig::is_struct(Type* type) {
return !is_bitset(type);
}
// static
bool ZoneTypeConfig::is_class(Type* type) {
- return is(type, kClassTag);
+ return is_struct(type) && struct_tag(as_struct(type)) == Type::kClassTag;
}
// static
bool ZoneTypeConfig::is_constant(Type* type) {
- return is(type, kConstantTag);
-}
-
-
-// static
-bool ZoneTypeConfig::is_union(Type* type) {
- return is(type, kUnionTag);
-}
-
-
-// static
-bool ZoneTypeConfig::tagged_is_union(Tagged* tagged) {
- return is(from_tagged(tagged), kUnionTag);
+ return is_struct(type) && struct_tag(as_struct(type)) == Type::kConstantTag;
}
// static
-ZoneTypeConfig::Tagged* ZoneTypeConfig::as_tagged(Type* type) {
- ASSERT(is_tagged(type));
- return reinterpret_cast<Tagged*>(type);
+ZoneTypeConfig::Struct* ZoneTypeConfig::as_struct(Type* type) {
+ ASSERT(is_struct(type));
+ return reinterpret_cast<Struct*>(type);
}
// static
i::Handle<i::Map> ZoneTypeConfig::as_class(Type* type) {
ASSERT(is_class(type));
- return i::Handle<i::Map>(tagged_get<i::Map**>(as_tagged(type), 1));
+ return i::Handle<i::Map>(static_cast<i::Map**>(as_struct(type)[3]));
}
// static
i::Handle<i::Object> ZoneTypeConfig::as_constant(Type* type) {
ASSERT(is_constant(type));
- return i::Handle<i::Object>(tagged_get<i::Object**>(as_tagged(type), 1));
-}
-
-
-// static
-ZoneTypeConfig::Unioned* ZoneTypeConfig::as_union(Type* type) {
- ASSERT(is_union(type));
- return tagged_as_union(as_tagged(type));
-}
-
-
-// static
-ZoneTypeConfig::Unioned* ZoneTypeConfig::tagged_as_union(Tagged* tagged) {
- ASSERT(tagged_is_union(tagged));
- return reinterpret_cast<Unioned*>(tagged);
+ return i::Handle<i::Object>(
+ static_cast<i::Object**>(as_struct(type)[3]));
}
// static
-ZoneTypeConfig::Type* ZoneTypeConfig::from_tagged(Tagged* tagged) {
- return reinterpret_cast<Type*>(tagged);
+ZoneTypeConfig::Type* ZoneTypeConfig::from_struct(Struct* structured) {
+ return reinterpret_cast<Type*>(structured);
}
// static
ZoneTypeConfig::Type* ZoneTypeConfig::from_class(
i::Handle<i::Map> map, int lub, Zone* zone) {
- Tagged* tagged = tagged_create(kClassTag, 2, zone);
- tagged_set(tagged, 0, lub);
- tagged_set(tagged, 1, map.location());
- return from_tagged(tagged);
+ Struct* structured = struct_create(Type::kClassTag, 2, zone);
+ structured[2] = from_bitset(lub);
+ structured[3] = map.location();
+ return from_struct(structured);
}
// static
ZoneTypeConfig::Type* ZoneTypeConfig::from_constant(
i::Handle<i::Object> value, int lub, Zone* zone) {
- Tagged* tagged = tagged_create(kConstantTag, 2, zone);
- tagged_set(tagged, 0, lub);
- tagged_set(tagged, 1, value.location());
- return from_tagged(tagged);
+ Struct* structured = struct_create(Type::kConstantTag, 2, zone);
+ structured[2] = from_bitset(lub);
+ structured[3] = value.location();
+ return from_struct(structured);
}
// static
-ZoneTypeConfig::Type* ZoneTypeConfig::from_union(Unioned* unioned) {
- return from_tagged(tagged_from_union(unioned));
+ZoneTypeConfig::Struct* ZoneTypeConfig::struct_create(
+ int tag, int length, Zone* zone) {
+ Struct* structured = reinterpret_cast<Struct*>(
+ zone->New(sizeof(void*) * (length + 2))); // NOLINT
+ structured[0] = reinterpret_cast<void*>(tag);
+ structured[1] = reinterpret_cast<void*>(length);
+ return structured;
}
// static
-ZoneTypeConfig::Tagged* ZoneTypeConfig::tagged_from_union(Unioned* unioned) {
- return reinterpret_cast<Tagged*>(unioned);
+void ZoneTypeConfig::struct_shrink(Struct* structured, int length) {
+ ASSERT(0 <= length && length <= struct_length(structured));
+ structured[1] = reinterpret_cast<void*>(length);
}
// static
-ZoneTypeConfig::Unioned* ZoneTypeConfig::union_create(int size, Zone* zone) {
- return tagged_as_union(tagged_create(kUnionTag, size, zone));
+int ZoneTypeConfig::struct_tag(Struct* structured) {
+ int tag = reinterpret_cast<intptr_t>(structured[0]);
+ return tag;
}
// static
-void ZoneTypeConfig::union_shrink(Unioned* unioned, int size) {
- tagged_shrink(tagged_from_union(unioned), size);
+int ZoneTypeConfig::struct_length(Struct* structured) {
+ int length = reinterpret_cast<intptr_t>(structured[1]);
+ return length;
}
// static
-ZoneTypeConfig::Type* ZoneTypeConfig::union_get(Unioned* unioned, int i) {
- Type* type = tagged_get<Type*>(tagged_from_union(unioned), i);
- ASSERT(!is_union(type));
- return type;
+Type* ZoneTypeConfig::struct_get(Struct* structured, int i) {
+ ASSERT(0 <= i && i <= struct_length(structured));
+ return static_cast<Type*>(structured[2 + i]);
}
// static
-void ZoneTypeConfig::union_set(Unioned* unioned, int i, Type* type) {
- ASSERT(!is_union(type));
- tagged_set(tagged_from_union(unioned), i, type);
-}
-
-
-// static
-int ZoneTypeConfig::union_length(Unioned* unioned) {
- return tagged_length(tagged_from_union(unioned));
+void ZoneTypeConfig::struct_set(Struct* structured, int i, Type* type) {
+ ASSERT(0 <= i && i <= struct_length(structured));
+ structured[2 + i] = type;
}
// static
int ZoneTypeConfig::lub_bitset(Type* type) {
ASSERT(is_class(type) || is_constant(type));
- return static_cast<int>(tagged_get<intptr_t>(as_tagged(type), 0));
+ return as_bitset(struct_get(as_struct(type), 0));
}
// -------------------------------------------------------------------------- //
// static
-bool HeapTypeConfig::is_union(Type* type) {
+bool HeapTypeConfig::is_struct(Type* type) {
return type->IsFixedArray();
}
// static
-i::Handle<HeapTypeConfig::Unioned> HeapTypeConfig::as_union(Type* type) {
- return i::handle(i::FixedArray::cast(type));
+i::Handle<HeapTypeConfig::Struct> HeapTypeConfig::as_struct(Type* type) {
+ return i::handle(Struct::cast(type));
}
// static
-i::Handle<HeapTypeConfig::Type> HeapTypeConfig::from_union(
- i::Handle<Unioned> unioned) {
- return i::Handle<Type>::cast(i::Handle<Object>::cast(unioned));
+i::Handle<HeapTypeConfig::Type> HeapTypeConfig::from_struct(
+ i::Handle<Struct> structured) {
+ return i::Handle<Type>::cast(i::Handle<Object>::cast(structured));
+}
+
+
+// static
+i::Handle<HeapTypeConfig::Struct> HeapTypeConfig::struct_create(
+ int tag, int length, Isolate* isolate) {
+ i::Handle<Struct> structured = isolate->factory()->NewFixedArray(length + 1);
+ structured->set(0, i::Smi::FromInt(tag));
+ return structured;
}
// static
-i::Handle<HeapTypeConfig::Unioned> HeapTypeConfig::union_create(
- int size, Isolate* isolate) {
- return isolate->factory()->NewFixedArray(size);
+void HeapTypeConfig::struct_shrink(i::Handle<Struct> structured, int length) {
+ structured->Shrink(length + 1);
}
// static
-void HeapTypeConfig::union_shrink(i::Handle<Unioned> unioned, int size) {
- unioned->Shrink(size);
+int HeapTypeConfig::struct_tag(i::Handle<Struct> structured) {
+ return static_cast<i::Smi*>(structured->get(0))->value();
}
// static
-i::Handle<HeapTypeConfig::Type> HeapTypeConfig::union_get(
- i::Handle<Unioned> unioned, int i) {
- Type* type = static_cast<Type*>(unioned->get(i));
- ASSERT(!is_union(type));
- return i::handle(type, unioned->GetIsolate());
+int HeapTypeConfig::struct_length(i::Handle<Struct> structured) {
+ return structured->length() - 1;
}
// static
-void HeapTypeConfig::union_set(
- i::Handle<Unioned> unioned, int i, i::Handle<Type> type) {
- ASSERT(!is_union(*type));
- unioned->set(i, *type);
+i::Handle<HeapTypeConfig::Type> HeapTypeConfig::struct_get(
+ i::Handle<Struct> structured, int i) {
+ Type* type = static_cast<Type*>(structured->get(i + 1));
+ return i::handle(type, structured->GetIsolate());
}
// static
-int HeapTypeConfig::union_length(i::Handle<Unioned> unioned) {
- return unioned->length();
+void HeapTypeConfig::struct_set(
+ i::Handle<Struct> structured, int i, i::Handle<Type> type) {
+ structured->set(i + 1, *type);
}
if (this->IsClass()) {
return 1;
} else if (this->IsUnion()) {
- UnionedHandle unioned = this->AsUnion();
+ StructHandle unioned = this->AsUnion();
int result = 0;
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- if (Config::union_get(unioned, i)->IsClass()) ++result;
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ if (Config::struct_get(unioned, i)->IsClass()) ++result;
}
return result;
} else {
if (this->IsConstant()) {
return 1;
} else if (this->IsUnion()) {
- UnionedHandle unioned = this->AsUnion();
+ StructHandle unioned = this->AsUnion();
int result = 0;
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- if (Config::union_get(unioned, i)->IsConstant()) ++result;
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ if (Config::struct_get(unioned, i)->IsConstant()) ++result;
}
return result;
} else {
typename TypeImpl<Config>::TypeHandle
TypeImpl<Config>::Iterator<T>::get_type() {
ASSERT(!Done());
- return type_->IsUnion() ? Config::union_get(type_->AsUnion(), index_) : type_;
+ return type_->IsUnion()
+ ? Config::struct_get(type_->AsUnion(), index_) : type_;
}
void TypeImpl<Config>::Iterator<T>::Advance() {
++index_;
if (type_->IsUnion()) {
- UnionedHandle unioned = type_->AsUnion();
- for (; index_ < Config::union_length(unioned); ++index_) {
- if (matches(Config::union_get(unioned, index_))) return;
+ StructHandle unioned = type_->AsUnion();
+ for (; index_ < Config::struct_length(unioned); ++index_) {
+ if (matches(Config::struct_get(unioned, index_))) return;
}
} else if (index_ == 0 && matches(type_)) {
return;
if (this->IsBitset()) {
return this->AsBitset();
} else if (this->IsUnion()) {
- UnionedHandle unioned = this->AsUnion();
+ StructHandle unioned = this->AsUnion();
int bitset = kNone;
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- bitset |= Config::union_get(unioned, i)->LubBitset();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ bitset |= Config::struct_get(unioned, i)->LubBitset();
}
return bitset;
} else if (this->IsClass()) {
return this->AsBitset();
} else if (this->IsUnion()) {
// All but the first are non-bitsets and thus would yield kNone anyway.
- return Config::union_get(this->AsUnion(), 0)->GlbBitset();
+ return Config::struct_get(this->AsUnion(), 0)->GlbBitset();
} else {
return kNone;
}
// (T1 \/ ... \/ Tn) <= T <=> (T1 <= T) /\ ... /\ (Tn <= T)
if (this->IsUnion()) {
- UnionedHandle unioned = this->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle this_i = Config::union_get(unioned, i);
+ StructHandle unioned = this->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle this_i = Config::struct_get(unioned, i);
if (!this_i->Is(that)) return false;
}
return true;
// (iff T is not a union)
ASSERT(!this->IsUnion());
if (that->IsUnion()) {
- UnionedHandle unioned = that->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle that_i = Config::union_get(unioned, i);
+ StructHandle unioned = that->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle that_i = Config::struct_get(unioned, i);
if (this->Is(that_i)) return true;
if (this->IsBitset()) break; // Fast fail, only first field is a bitset.
}
// (T1 \/ ... \/ Tn) overlaps T <=> (T1 overlaps T) \/ ... \/ (Tn overlaps T)
if (this->IsUnion()) {
- UnionedHandle unioned = this->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle this_i = Config::union_get(unioned, i);
+ StructHandle unioned = this->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle this_i = Config::struct_get(unioned, i);
if (this_i->Maybe(that)) return true;
}
return false;
// T overlaps (T1 \/ ... \/ Tn) <=> (T overlaps T1) \/ ... \/ (T overlaps Tn)
if (that->IsUnion()) {
- UnionedHandle unioned = that->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle that_i = Config::union_get(unioned, i);
+ StructHandle unioned = that->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle that_i = Config::struct_get(unioned, i);
if (this->Maybe(that_i)) return true;
}
return false;
template<class Config>
-bool TypeImpl<Config>::InUnion(UnionedHandle unioned, int current_size) {
+bool TypeImpl<Config>::InUnion(StructHandle unioned, int current_size) {
ASSERT(!this->IsUnion());
for (int i = 0; i < current_size; ++i) {
- TypeHandle type = Config::union_get(unioned, i);
+ TypeHandle type = Config::struct_get(unioned, i);
if (this->Is(type)) return true;
}
return false;
}
-// Get non-bitsets from this which are not subsumed by union, store at unioned,
+// Get non-bitsets from this which are not subsumed by union, store at result,
// starting at index. Returns updated index.
template<class Config>
int TypeImpl<Config>::ExtendUnion(
- UnionedHandle result, TypeHandle type, int current_size) {
+ StructHandle result, TypeHandle type, int current_size) {
int old_size = current_size;
if (type->IsClass() || type->IsConstant()) {
if (!type->InUnion(result, old_size)) {
- Config::union_set(result, current_size++, type);
+ Config::struct_set(result, current_size++, type);
}
} else if (type->IsUnion()) {
- UnionedHandle unioned = type->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle type = Config::union_get(unioned, i);
+ StructHandle unioned = type->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle type = Config::struct_get(unioned, i);
ASSERT(i == 0 ||
- !(type->IsBitset() || type->Is(Config::union_get(unioned, 0))));
+ !(type->IsBitset() || type->Is(Config::struct_get(unioned, 0))));
if (!type->IsBitset() && !type->InUnion(result, old_size)) {
- Config::union_set(result, current_size++, type);
+ Config::struct_set(result, current_size++, type);
}
}
}
// Union is O(1) on simple bit unions, but O(n*m) on structured unions.
-// TODO(rossberg): Should we use object sets somehow? Is it worth it?
template<class Config>
typename TypeImpl<Config>::TypeHandle TypeImpl<Config>::Union(
TypeHandle type1, TypeHandle type2, Region* region) {
// Slow case: may need to produce a Unioned object.
int size = 0;
if (!type1->IsBitset()) {
- size += (type1->IsUnion() ? Config::union_length(type1->AsUnion()) : 1);
+ size += (type1->IsUnion() ? Config::struct_length(type1->AsUnion()) : 1);
}
if (!type2->IsBitset()) {
- size += (type2->IsUnion() ? Config::union_length(type2->AsUnion()) : 1);
+ size += (type2->IsUnion() ? Config::struct_length(type2->AsUnion()) : 1);
}
int bitset = type1->GlbBitset() | type2->GlbBitset();
if (IsInhabited(bitset)) ++size;
ASSERT(size >= 1);
- UnionedHandle unioned = Config::union_create(size, region);
+ StructHandle unioned = Config::struct_create(kUnionTag, size, region);
size = 0;
if (IsInhabited(bitset)) {
- Config::union_set(unioned, size++, Config::from_bitset(bitset, region));
+ Config::struct_set(unioned, size++, Config::from_bitset(bitset, region));
}
size = ExtendUnion(unioned, type1, size);
size = ExtendUnion(unioned, type2, size);
if (size == 1) {
- return Config::union_get(unioned, 0);
+ return Config::struct_get(unioned, 0);
} else {
- Config::union_shrink(unioned, size);
- return Config::from_union(unioned);
+ Config::struct_shrink(unioned, size);
+ return Config::from_struct(unioned);
}
}
-// Get non-bitsets from type which are also in other, store at unioned,
+// Get non-bitsets from type which are also in other, store at result,
// starting at index. Returns updated index.
template<class Config>
int TypeImpl<Config>::ExtendIntersection(
- UnionedHandle result, TypeHandle type, TypeHandle other, int current_size) {
+ StructHandle result, TypeHandle type, TypeHandle other, int current_size) {
int old_size = current_size;
if (type->IsClass() || type->IsConstant()) {
if (type->Is(other) && !type->InUnion(result, old_size)) {
- Config::union_set(result, current_size++, type);
+ Config::struct_set(result, current_size++, type);
}
} else if (type->IsUnion()) {
- UnionedHandle unioned = type->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle type = Config::union_get(unioned, i);
+ StructHandle unioned = type->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle type = Config::struct_get(unioned, i);
ASSERT(i == 0 ||
- !(type->IsBitset() || type->Is(Config::union_get(unioned, 0))));
+ !(type->IsBitset() || type->Is(Config::struct_get(unioned, 0))));
if (!type->IsBitset() && type->Is(other) &&
!type->InUnion(result, old_size)) {
- Config::union_set(result, current_size++, type);
+ Config::struct_set(result, current_size++, type);
}
}
}
// Slow case: may need to produce a Unioned object.
int size = INT_MAX;
if (!type1->IsBitset()) {
- size = (type1->IsUnion() ? Config::union_length(type1->AsUnion()) : 1);
+ size = (type1->IsUnion() ? Config::struct_length(type1->AsUnion()) : 1);
}
if (!type2->IsBitset()) {
size = Min(size,
- type2->IsUnion() ? Config::union_length(type2->AsUnion()) : 1);
+ type2->IsUnion() ? Config::struct_length(type2->AsUnion()) : 1);
}
int bitset = type1->GlbBitset() & type2->GlbBitset();
if (IsInhabited(bitset)) ++size;
ASSERT(size >= 1);
- UnionedHandle unioned = Config::union_create(size, region);
+ StructHandle unioned = Config::struct_create(kUnionTag, size, region);
size = 0;
if (IsInhabited(bitset)) {
- Config::union_set(unioned, size++, Config::from_bitset(bitset, region));
+ Config::struct_set(unioned, size++, Config::from_bitset(bitset, region));
}
size = ExtendIntersection(unioned, type1, type2, size);
size = ExtendIntersection(unioned, type2, type1, size);
if (size == 0) {
return None(region);
} else if (size == 1) {
- return Config::union_get(unioned, 0);
+ return Config::struct_get(unioned, 0);
} else {
- Config::union_shrink(unioned, size);
- return Config::from_union(unioned);
+ Config::struct_shrink(unioned, size);
+ return Config::from_struct(unioned);
}
}
return Config::from_constant(type->AsConstant(), type->LubBitset(), region);
} else {
ASSERT(type->IsUnion());
- typename OtherType::UnionedHandle unioned = type->AsUnion();
- int length = OtherType::UnionLength(unioned);
- UnionedHandle new_unioned = Config::union_create(length, region);
+ typename OtherType::StructHandle unioned = type->AsUnion();
+ int length = OtherType::StructLength(unioned);
+ StructHandle new_unioned = Config::struct_create(kUnionTag, length, region);
for (int i = 0; i < length; ++i) {
- Config::union_set(new_unioned, i,
- Convert<OtherType>(OtherType::UnionGet(unioned, i), region));
+ Config::struct_set(new_unioned, i,
+ Convert<OtherType>(OtherType::StructGet(unioned, i), region));
}
- return Config::from_union(new_unioned);
+ return Config::from_struct(new_unioned);
}
}
PrintF(out, ")");
} else if (this->IsUnion()) {
PrintF(out, "(");
- UnionedHandle unioned = this->AsUnion();
- for (int i = 0; i < Config::union_length(unioned); ++i) {
- TypeHandle type_i = Config::union_get(unioned, i);
+ StructHandle unioned = this->AsUnion();
+ for (int i = 0; i < Config::struct_length(unioned); ++i) {
+ TypeHandle type_i = Config::struct_get(unioned, i);
if (i > 0) PrintF(out, " | ");
type_i->TypePrint(out, dim);
}
// struct Config {
// typedef Base;
-// typedef Unioned;
+// typedef Struct;
// typedef Region;
// template<class> struct Handle { typedef type; } // No template typedefs...
// static Handle<Type>::type handle(Type* type); // !is_bitset(type)
// static bool is_bitset(Type*);
// static bool is_class(Type*);
// static bool is_constant(Type*);
-// static bool is_union(Type*);
+// static bool is_struct(Type*);
// static int as_bitset(Type*);
// static i::Handle<i::Map> as_class(Type*);
// static i::Handle<i::Object> as_constant(Type*);
-// static Handle<Unioned>::type as_union(Type*);
+// static Handle<Struct>::type as_struct(Type*);
// static Type* from_bitset(int bitset);
// static Handle<Type>::type from_bitset(int bitset, Region*);
// static Handle<Type>::type from_class(i::Handle<Map>, int lub, Region*);
// static Handle<Type>::type from_constant(i::Handle<Object>, int, Region*);
-// static Handle<Type>::type from_union(Handle<Unioned>::type);
-// static Handle<Unioned>::type union_create(int size, Region*);
-// static void union_shrink(Handle<Unioned>::type, int size);
-// static Handle<Type>::type union_get(Handle<Unioned>::type, int);
-// static void union_set(Handle<Unioned>::type, int, Handle<Type>::type);
-// static int union_length(Handle<Unioned>::type);
+// static Handle<Type>::type from_struct(Handle<Struct>::type);
+// static Handle<Struct>::type struct_create(int tag, int length, Region*);
+// static void struct_shrink(Handle<Struct>::type, int length);
+// static int struct_tag(Handle<Struct>::type);
+// static int struct_length(Handle<Struct>::type);
+// static Handle<Type>::type struct_get(Handle<Struct>::type, int);
+// static void struct_set(Handle<Struct>::type, int, Handle<Type>::type);
// static int lub_bitset(Type*);
// }
template<class Config>
private:
template<class> friend class Iterator;
template<class> friend class TypeImpl;
+ friend struct ZoneTypeConfig;
+ friend struct HeapTypeConfig;
- // A union is a fixed array containing types. Invariants:
+ enum Tag {
+ kClassTag,
+ kConstantTag,
+ kUnionTag
+ };
+
+ // A structured type contains a tag an a variable number of type fields.
+ // A union is a structured type with the following invariants:
// - its length is at least 2
// - at most one field is a bitset, and it must go into index 0
// - no field is a union
- typedef typename Config::Unioned Unioned;
- typedef typename Config::template Handle<Unioned>::type UnionedHandle;
+ typedef typename Config::Struct Struct;
+ typedef typename Config::template Handle<Struct>::type StructHandle;
enum {
#define DECLARE_TYPE(type, value) k##type = (value),
bool IsNone() { return this == None(); }
bool IsAny() { return this == Any(); }
bool IsBitset() { return Config::is_bitset(this); }
- bool IsUnion() { return Config::is_union(this); }
+ bool IsStruct(Tag tag) {
+ return Config::is_struct(this)
+ && Config::struct_tag(Config::as_struct(this)) == tag;
+ }
+ bool IsUnion() { return IsStruct(kUnionTag); }
+
int AsBitset() { return Config::as_bitset(this); }
- UnionedHandle AsUnion() { return Config::as_union(this); }
+ StructHandle AsStruct(Tag tag) {
+ ASSERT(IsStruct(tag));
+ return Config::as_struct(this);
+ }
+ StructHandle AsUnion() { return AsStruct(kUnionTag); }
- static int UnionLength(UnionedHandle unioned) {
- return Config::union_length(unioned);
+ static int StructLength(StructHandle structured) {
+ return Config::struct_length(structured);
}
- static TypeHandle UnionGet(UnionedHandle unioned, int i) {
- return Config::union_get(unioned, i);
+ static TypeHandle StructGet(StructHandle structured, int i) {
+ return Config::struct_get(structured, i);
}
bool SlowIs(TypeImpl* that);
static int LubBitset(i::Object* value);
static int LubBitset(i::Map* map);
- bool InUnion(UnionedHandle unioned, int current_size);
+ bool InUnion(StructHandle unioned, int current_size);
static int ExtendUnion(
- UnionedHandle unioned, TypeHandle t, int current_size);
+ StructHandle unioned, TypeHandle t, int current_size);
static int ExtendIntersection(
- UnionedHandle unioned, TypeHandle t, TypeHandle other, int current_size);
+ StructHandle unioned, TypeHandle t, TypeHandle other, int current_size);
static const char* bitset_name(int bitset);
static void BitsetTypePrint(FILE* out, int bitset);
// Zone-allocated types are either (odd) integers to represent bitsets, or
-// (even) pointers to zone lists for everything else. The first slot of every
-// list is an explicit tag value to distinguish representation.
+// (even) pointers to structures for everything else.
struct ZoneTypeConfig {
- private:
- typedef i::ZoneList<void*> Tagged;
-
- enum Tag {
- kClassTag,
- kConstantTag,
- kUnionTag
- };
-
- static inline Tagged* tagged_create(Tag tag, int size, Zone* zone);
- static inline void tagged_shrink(Tagged* tagged, int size);
- static inline Tag tagged_tag(Tagged* tagged);
- template<class T> static inline T tagged_get(Tagged* tagged, int i);
- template<class T> static inline void tagged_set(Tagged* tagged, int i, T val);
- static inline int tagged_length(Tagged* tagged);
-
- public:
typedef TypeImpl<ZoneTypeConfig> Type;
class Base {};
- typedef i::ZoneList<Type*> Unioned;
+ typedef void* Struct;
typedef i::Zone Region;
template<class T> struct Handle { typedef T* type; };
static inline Type* handle(Type* type);
- static inline bool is(Type* type, Tag tag);
static inline bool is_bitset(Type* type);
- static inline bool is_tagged(Type* type);
static inline bool is_class(Type* type);
static inline bool is_constant(Type* type);
- static inline bool is_union(Type* type);
- static inline bool tagged_is_union(Tagged* tagged);
+ static inline bool is_struct(Type* type);
static inline int as_bitset(Type* type);
- static inline Tagged* as_tagged(Type* type);
+ static inline Struct* as_struct(Type* type);
static inline i::Handle<i::Map> as_class(Type* type);
static inline i::Handle<i::Object> as_constant(Type* type);
- static inline Unioned* as_union(Type* type);
- static inline Unioned* tagged_as_union(Tagged* tagged);
static inline Type* from_bitset(int bitset);
static inline Type* from_bitset(int bitset, Zone* zone);
- static inline Type* from_tagged(Tagged* tagged);
+ static inline Type* from_struct(Struct* structured);
static inline Type* from_class(i::Handle<i::Map> map, int lub, Zone* zone);
static inline Type* from_constant(
i::Handle<i::Object> value, int lub, Zone* zone);
- static inline Type* from_union(Unioned* unioned);
- static inline Tagged* tagged_from_union(Unioned* unioned);
- static inline Unioned* union_create(int size, Zone* zone);
- static inline void union_shrink(Unioned* unioned, int size);
- static inline Type* union_get(Unioned* unioned, int i);
- static inline void union_set(Unioned* unioned, int i, Type* type);
- static inline int union_length(Unioned* unioned);
+ static inline Struct* struct_create(int tag, int length, Zone* zone);
+ static inline void struct_shrink(Struct* structured, int length);
+ static inline int struct_tag(Struct* structured);
+ static inline int struct_length(Struct* structured);
+ static inline Type* struct_get(Struct* structured, int i);
+ static inline void struct_set(Struct* structured, int i, Type* type);
static inline int lub_bitset(Type* type);
};
struct HeapTypeConfig {
typedef TypeImpl<HeapTypeConfig> Type;
typedef i::Object Base;
- typedef i::FixedArray Unioned;
+ typedef i::FixedArray Struct;
typedef i::Isolate Region;
template<class T> struct Handle { typedef i::Handle<T> type; };
static inline bool is_bitset(Type* type);
static inline bool is_class(Type* type);
static inline bool is_constant(Type* type);
- static inline bool is_union(Type* type);
+ static inline bool is_struct(Type* type);
static inline int as_bitset(Type* type);
static inline i::Handle<i::Map> as_class(Type* type);
static inline i::Handle<i::Object> as_constant(Type* type);
- static inline i::Handle<Unioned> as_union(Type* type);
+ static inline i::Handle<Struct> as_struct(Type* type);
static inline Type* from_bitset(int bitset);
static inline i::Handle<Type> from_bitset(int bitset, Isolate* isolate);
static inline i::Handle<Type> from_class(
i::Handle<i::Map> map, int lub, Isolate* isolate);
static inline i::Handle<Type> from_constant(
i::Handle<i::Object> value, int lub, Isolate* isolate);
- static inline i::Handle<Type> from_union(i::Handle<Unioned> unioned);
- static inline i::Handle<Unioned> union_create(int size, Isolate* isolate);
- static inline void union_shrink(i::Handle<Unioned> unioned, int size);
- static inline i::Handle<Type> union_get(i::Handle<Unioned> unioned, int i);
- static inline void union_set(
- i::Handle<Unioned> unioned, int i, i::Handle<Type> type);
- static inline int union_length(i::Handle<Unioned> unioned);
+ static inline i::Handle<Type> from_struct(i::Handle<Struct> structured);
+ static inline i::Handle<Struct> struct_create(
+ int tag, int length, Isolate* isolate);
+ static inline void struct_shrink(i::Handle<Struct> structured, int length);
+ static inline int struct_tag(i::Handle<Struct> structured);
+ static inline int struct_length(i::Handle<Struct> structured);
+ static inline i::Handle<Type> struct_get(i::Handle<Struct> structured, int i);
+ static inline void struct_set(
+ i::Handle<Struct> structured, int i, i::Handle<Type> type);
static inline int lub_bitset(Type* type);
};
// Testing auxiliaries (breaking the Type abstraction).
struct ZoneRep {
- static bool IsTagged(Type* t, int tag) {
- return !IsBitset(t)
- && reinterpret_cast<intptr_t>(AsTagged(t)->at(0)) == tag;
+ struct Struct { int tag; int length; void* args[1]; };
+
+ static bool IsStruct(Type* t, int tag) {
+ return !IsBitset(t) && AsStruct(t)->tag == tag;
}
static bool IsBitset(Type* t) { return reinterpret_cast<intptr_t>(t) & 1; }
- static bool IsClass(Type* t) { return IsTagged(t, 0); }
- static bool IsConstant(Type* t) { return IsTagged(t, 1); }
- static bool IsUnion(Type* t) { return IsTagged(t, 2); }
+ static bool IsClass(Type* t) { return IsStruct(t, 0); }
+ static bool IsConstant(Type* t) { return IsStruct(t, 1); }
+ static bool IsUnion(Type* t) { return IsStruct(t, 2); }
- static ZoneList<void*>* AsTagged(Type* t) {
- return reinterpret_cast<ZoneList<void*>*>(t);
+ static Struct* AsStruct(Type* t) {
+ return reinterpret_cast<Struct*>(t);
}
static int AsBitset(Type* t) {
return static_cast<int>(reinterpret_cast<intptr_t>(t) >> 1);
}
static Map* AsClass(Type* t) {
- return *reinterpret_cast<Map**>(AsTagged(t)->at(2));
+ return *static_cast<Map**>(AsStruct(t)->args[1]);
}
static Object* AsConstant(Type* t) {
- return *reinterpret_cast<Object**>(AsTagged(t)->at(2));
+ return *static_cast<Object**>(AsStruct(t)->args[1]);
}
- static ZoneList<Type*>* AsUnion(Type* t) {
- return reinterpret_cast<ZoneList<Type*>*>(AsTagged(t));
+ static Struct* AsUnion(Type* t) {
+ return AsStruct(t);
}
+ static int Length(Struct* structured) { return structured->length; }
static Zone* ToRegion(Zone* zone, Isolate* isolate) { return zone; }
};
struct HeapRep {
+ typedef FixedArray Struct;
+
+ static bool IsStruct(Handle<HeapType> t, int tag) {
+ return t->IsFixedArray() && Smi::cast(AsStruct(t)->get(0))->value() == tag;
+ }
static bool IsBitset(Handle<HeapType> t) { return t->IsSmi(); }
static bool IsClass(Handle<HeapType> t) { return t->IsMap(); }
static bool IsConstant(Handle<HeapType> t) { return t->IsBox(); }
- static bool IsUnion(Handle<HeapType> t) { return t->IsFixedArray(); }
+ static bool IsUnion(Handle<HeapType> t) { return IsStruct(t, 2); }
+ static Struct* AsStruct(Handle<HeapType> t) { return FixedArray::cast(*t); }
static int AsBitset(Handle<HeapType> t) { return Smi::cast(*t)->value(); }
static Map* AsClass(Handle<HeapType> t) { return Map::cast(*t); }
static Object* AsConstant(Handle<HeapType> t) {
return Box::cast(*t)->value();
}
- static FixedArray* AsUnion(Handle<HeapType> t) {
- return FixedArray::cast(*t);
- }
+ static Struct* AsUnion(Handle<HeapType> t) { return AsStruct(t); }
+ static int Length(Struct* structured) { return structured->length() - 1; }
static Isolate* ToRegion(Zone* zone, Isolate* isolate) { return isolate; }
};
} else if (Rep::IsConstant(type1)) {
CHECK_EQ(Rep::AsConstant(type1), Rep::AsConstant(type2));
} else if (Rep::IsUnion(type1)) {
- CHECK_EQ(Rep::AsUnion(type1)->length(), Rep::AsUnion(type2)->length());
+ CHECK_EQ(
+ Rep::Length(Rep::AsUnion(type1)), Rep::Length(Rep::AsUnion(type2)));
}
CHECK(type1->Is(type2));
CHECK(type2->Is(type1));
projects / platform / upstream / v8.git / commitdiff