--- /dev/null
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "types.h"
+
+namespace v8 {
+namespace internal {
+
+// Get the smallest bitset subsuming this type.
+int Type::LubBitset() {
+ if (this->is_bitset()) {
+ return this->as_bitset();
+ } else if (this->is_union()) {
+ Handle<Unioned> unioned = this->as_union();
+ int bitset = kNone;
+ for (int i = 0; i < unioned->length(); ++i) {
+ bitset |= union_get(unioned, i)->LubBitset();
+ }
+ return bitset;
+ } else {
+ Map* map =
+ this->is_class() ? *this->as_class() : this->as_constant()->map();
+ switch (map->instance_type()) {
+ case STRING_TYPE:
+ case ASCII_STRING_TYPE:
+ case CONS_STRING_TYPE:
+ case CONS_ASCII_STRING_TYPE:
+ case SLICED_STRING_TYPE:
+ case EXTERNAL_STRING_TYPE:
+ case EXTERNAL_ASCII_STRING_TYPE:
+ case EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE:
+ case SHORT_EXTERNAL_STRING_TYPE:
+ case SHORT_EXTERNAL_ASCII_STRING_TYPE:
+ case SHORT_EXTERNAL_STRING_WITH_ONE_BYTE_DATA_TYPE:
+ case INTERNALIZED_STRING_TYPE:
+ case ASCII_INTERNALIZED_STRING_TYPE:
+ case CONS_INTERNALIZED_STRING_TYPE:
+ case CONS_ASCII_INTERNALIZED_STRING_TYPE:
+ case EXTERNAL_INTERNALIZED_STRING_TYPE:
+ case EXTERNAL_ASCII_INTERNALIZED_STRING_TYPE:
+ case EXTERNAL_INTERNALIZED_STRING_WITH_ONE_BYTE_DATA_TYPE:
+ case SHORT_EXTERNAL_INTERNALIZED_STRING_TYPE:
+ case SHORT_EXTERNAL_ASCII_INTERNALIZED_STRING_TYPE:
+ case SHORT_EXTERNAL_INTERNALIZED_STRING_WITH_ONE_BYTE_DATA_TYPE:
+ return kString;
+ case SYMBOL_TYPE:
+ return kSymbol;
+ case ODDBALL_TYPE:
+ return kOddball;
+ case HEAP_NUMBER_TYPE:
+ return kDouble;
+ case JS_VALUE_TYPE:
+ case JS_DATE_TYPE:
+ case JS_OBJECT_TYPE:
+ case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
+ case JS_GENERATOR_OBJECT_TYPE:
+ case JS_MODULE_TYPE:
+ case JS_GLOBAL_OBJECT_TYPE:
+ case JS_BUILTINS_OBJECT_TYPE:
+ case JS_GLOBAL_PROXY_TYPE:
+ case JS_ARRAY_BUFFER_TYPE:
+ case JS_TYPED_ARRAY_TYPE:
+ case JS_WEAK_MAP_TYPE:
+ case JS_REGEXP_TYPE:
+ return kOtherObject;
+ case JS_ARRAY_TYPE:
+ return kArray;
+ case JS_FUNCTION_TYPE:
+ return kFunction;
+ case JS_PROXY_TYPE:
+ case JS_FUNCTION_PROXY_TYPE:
+ return kProxy;
+ default:
+ UNREACHABLE();
+ return kNone;
+ }
+ }
+}
+
+
+// Get the largest bitset subsumed by this type.
+int Type::GlbBitset() {
+ if (this->is_bitset()) {
+ return this->as_bitset();
+ } else if (this->is_union()) {
+ // All but the first are non-bitsets and thus would yield kNone anyway.
+ return union_get(this->as_union(), 0)->GlbBitset();
+ } else {
+ return kNone;
+ }
+}
+
+
+// Check this <= that.
+bool Type::Is(Handle<Type> that) {
+ // Fast path for bitsets.
+ if (that->is_bitset()) {
+ return (this->LubBitset() | that->as_bitset()) == that->as_bitset();
+ }
+
+ if (that->is_class()) {
+ return this->is_class() && *this->as_class() == *that->as_class();
+ }
+ if (that->is_constant()) {
+ return this->is_constant() && *this->as_constant() == *that->as_constant();
+ }
+
+ // (T1 \/ ... \/ Tn) <= T <=> (T1 <= T) /\ ... /\ (Tn <= T)
+ if (this->is_union()) {
+ Handle<Unioned> unioned = this->as_union();
+ for (int i = 0; i < unioned->length(); ++i) {
+ Handle<Type> this_i = union_get(unioned, i);
+ if (!this_i->Is(that)) return false;
+ }
+ return true;
+ }
+
+ // T <= (T1 \/ ... \/ Tn) <=> (T <= T1) \/ ... \/ (T <= Tn)
+ // (iff T is not a union)
+ if (that->is_union()) {
+ Handle<Unioned> unioned = that->as_union();
+ for (int i = 0; i < unioned->length(); ++i) {
+ Handle<Type> that_i = union_get(unioned, i);
+ if (this->Is(that_i)) return true;
+ if (this->is_bitset()) break; // Fast fail, no other field is a bitset.
+ }
+ return false;
+ }
+
+ return false;
+}
+
+
+// Check this overlaps that.
+bool Type::Maybe(Handle<Type> that) {
+ // Fast path for bitsets.
+ if (this->is_bitset()) {
+ return (this->as_bitset() & that->LubBitset()) != 0;
+ }
+ if (that->is_bitset()) {
+ return (this->LubBitset() & that->as_bitset()) != 0;
+ }
+
+ if (this->is_class()) {
+ return that->is_class() && *this->as_class() == *that->as_class();
+ }
+ if (this->is_constant()) {
+ return that->is_constant() && *this->as_constant() == *that->as_constant();
+ }
+
+ // (T1 \/ ... \/ Tn) overlaps T <=> (T1 overlaps T) \/ ... \/ (Tn overlaps T)
+ if (this->is_union()) {
+ Handle<Unioned> unioned = this->as_union();
+ for (int i = 0; i < unioned->length(); ++i) {
+ Handle<Type> this_i = union_get(unioned, i);
+ if (this_i->Maybe(that)) return true;
+ }
+ return false;
+ }
+
+ // T overlaps (T1 \/ ... \/ Tn) <=> (T overlaps T1) \/ ... \/ (T overlaps Tn)
+ if (that->is_union()) {
+ Handle<Unioned> unioned = that->as_union();
+ for (int i = 0; i < unioned->length(); ++i) {
+ Handle<Type> that_i = union_get(unioned, i);
+ if (this->Maybe(that_i)) return true;
+ }
+ return false;
+ }
+
+ return false;
+}
+
+
+bool Type::InUnion(Handle<Unioned> unioned, int current_size) {
+ ASSERT(!this->is_union());
+ for (int i = 0; i < current_size; ++i) {
+ Handle<Type> type = union_get(unioned, i);
+ if (type->is_bitset() ? this->Is(type) : this == *type) return true;
+ }
+ return false;
+}
+
+// Get non-bitsets from this which are not subsumed by that, store at unioned,
+// starting at index. Returns updated index.
+int Type::ExtendUnion(Handle<Unioned> result, int current_size) {
+ int old_size = current_size;
+ if (this->is_class() || this->is_constant()) {
+ if (!this->InUnion(result, old_size)) result->set(current_size++, this);
+ } else if (this->is_union()) {
+ Handle<Unioned> unioned = this->as_union();
+ for (int i = 0; i < unioned->length(); ++i) {
+ Handle<Type> type = union_get(unioned, i);
+ ASSERT(i == 0 || !(type->is_bitset() || type->Is(union_get(unioned, 0))));
+ if (type->is_bitset()) continue;
+ if (!type->InUnion(result, old_size)) result->set(current_size++, *type);
+ }
+ }
+ return current_size;
+}
+
+
+// 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?
+Type* Type::Union(Handle<Type> type1, Handle<Type> type2) {
+ // Fast case: bit sets.
+ if (type1->is_bitset() && type2->is_bitset()) {
+ return from_bitset(type1->as_bitset() | type2->as_bitset());
+ }
+
+ // Semi-fast case: Unioned objects are neither involved nor produced.
+ if (!(type1->is_union() || type2->is_union())) {
+ if (type1->Is(type2)) return *type2;
+ if (type2->Is(type1)) return *type1;
+ }
+
+ // Slow case: may need to produce a Unioned object.
+ Isolate* isolate = NULL;
+ int size = type1->is_bitset() || type2->is_bitset() ? 1 : 0;
+ if (!type1->is_bitset()) {
+ isolate = HeapObject::cast(*type1)->GetIsolate();
+ size += (type1->is_union() ? type1->as_union()->length() : 1);
+ }
+ if (!type2->is_bitset()) {
+ isolate = HeapObject::cast(*type2)->GetIsolate();
+ size += (type2->is_union() ? type2->as_union()->length() : 1);
+ }
+ ASSERT(isolate != NULL);
+ ASSERT(size >= 2);
+ Handle<Unioned> unioned = isolate->factory()->NewFixedArray(size);
+ size = 0;
+
+ int bitset = type1->GlbBitset() | type2->GlbBitset();
+ if (bitset != kNone) unioned->set(size++, from_bitset(bitset));
+ size = type1->ExtendUnion(unioned, size);
+ size = type2->ExtendUnion(unioned, size);
+
+ if (size == 1) {
+ return *union_get(unioned, 0);
+ } else if (size == unioned->length()) {
+ return from_handle(unioned);
+ }
+
+ // There was an overlap. Copy to smaller union.
+ Handle<Unioned> result = isolate->factory()->NewFixedArray(size);
+ for (int i = 0; i < size; ++i) result->set(i, unioned->get(i));
+ return from_handle(result);
+}
+
+
+Type* Type::Optional(Handle<Type> type) {
+ return type->is_bitset()
+ ? from_bitset(type->as_bitset() | kUndefined)
+ : Union(type, Undefined()->handle_via_isolate_of(*type));
+}
+
+} } // namespace v8::internal
--- /dev/null
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_TYPES_H_
+#define V8_TYPES_H_
+
+#include "v8.h"
+
+#include "objects.h"
+
+namespace v8 {
+namespace internal {
+
+
+// A simple type system for compiler-internal use. It is based entirely on
+// union types, and all subtyping hence amounts to set inclusion. Besides the
+// obvious primitive types and some predefined unions, the type language also
+// can express class types (a.k.a. specific maps) and singleton types (i.e.,
+// concrete constants).
+//
+// The following equations and inequations hold:
+//
+// None <= T
+// T <= Any
+//
+// Oddball = Boolean \/ Null \/ Undefined
+// Number = Smi \/ Double
+// Name = String \/ Symbol
+// UniqueName = InternalizedString \/ Symbol
+// InternalizedString < String
+//
+// Receiver = Object \/ Proxy
+// Array < Object
+// Function < Object
+//
+// Class(map) < T iff instance_type(map) < T
+// Constant(x) < T iff instance_type(map(x)) < T
+//
+// Note that Constant(x) < Class(map(x)) does _not_ hold, since x's map can
+// change! (Its instance type cannot, however.)
+// TODO(rossberg): the latter is not currently true for proxies, because of fix,
+// but will hold once we implement direct proxies.
+//
+// There are two main functions for testing types:
+//
+// T1->Is(T2) -- tests whether T1 is included in T2 (i.e., T1 <= T2)
+// T1->Maybe(T2) -- tests whether T1 and T2 overlap (i.e., T1 /\ T2 =/= 0)
+//
+// Typically, the latter should be used to check whether a specific case needs
+// handling (e.g., via T->Maybe(Number)).
+//
+// There is no functionality to discover whether a type is a leaf in the
+// lattice. That is intentional. It should always be possible to refine the
+// lattice (e.g., splitting up number types further) without invalidating any
+// existing assumptions or tests.
+//
+// Internally, all 'primitive' types, and their unions, are represented as
+// bitsets via smis. Class and Constant are heap pointers to the respective
+// argument. Only unions containing Class'es or Constant's require allocation.
+//
+// The type representation is heap-allocated, so cannot (currently) be used in
+// a parallel compilation context.
+
+class Type : public Object {
+ public:
+ static Type* None() { return from_bitset(kNone); }
+ static Type* Any() { return from_bitset(kAny); }
+
+ static Type* Oddball() { return from_bitset(kOddball); }
+ static Type* Boolean() { return from_bitset(kBoolean); }
+ static Type* Null() { return from_bitset(kNull); }
+ static Type* Undefined() { return from_bitset(kUndefined); }
+
+ static Type* Number() { return from_bitset(kNumber); }
+ static Type* Smi() { return from_bitset(kSmi); }
+ static Type* Double() { return from_bitset(kDouble); }
+
+ static Type* Name() { return from_bitset(kName); }
+ static Type* UniqueName() { return from_bitset(kUniqueName); }
+ static Type* String() { return from_bitset(kString); }
+ static Type* InternalizedString() { return from_bitset(kInternalizedString); }
+ static Type* Symbol() { return from_bitset(kSymbol); }
+
+ static Type* Receiver() { return from_bitset(kReceiver); }
+ static Type* Object() { return from_bitset(kObject); }
+ static Type* Array() { return from_bitset(kArray); }
+ static Type* Function() { return from_bitset(kFunction); }
+ static Type* Proxy() { return from_bitset(kProxy); }
+
+ static Type* Class(Handle<Map> map) { return from_handle(map); }
+ static Type* Constant(Handle<HeapObject> value) {
+ ASSERT(!value->IsMap() && !value->IsFixedArray());
+ return from_handle(value);
+ }
+
+ static Type* Union(Handle<Type> type1, Handle<Type> type2);
+ static Type* Optional(Handle<Type> type); // type \/ Undefined
+
+ bool Is(Handle<Type> that);
+ bool Maybe(Handle<Type> that);
+
+ // TODO(rossberg): method to iterate unions?
+
+ private:
+ // A union is a fixed array containing types. 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 FixedArray Unioned;
+
+ enum {
+ kNull = 1 << 0,
+ kUndefined = 1 << 1,
+ kBoolean = 1 << 2,
+ kSmi = 1 << 3,
+ kDouble = 1 << 4,
+ kSymbol = 1 << 5,
+ kInternalizedString = 1 << 6,
+ kOtherString = 1 << 7,
+ kArray = 1 << 8,
+ kFunction = 1 << 9,
+ kOtherObject = 1 << 10,
+ kProxy = 1 << 11,
+
+ kOddball = kBoolean | kNull | kUndefined,
+ kNumber = kSmi | kDouble,
+ kString = kInternalizedString | kOtherString,
+ kUniqueName = kSymbol | kInternalizedString,
+ kName = kSymbol | kString,
+ kObject = kArray | kFunction | kOtherObject,
+ kReceiver = kObject | kProxy,
+ kAny = kOddball | kNumber | kName | kReceiver,
+ kNone = 0
+ };
+
+ bool is_bitset() { return this->IsSmi(); }
+ bool is_class() { return this->IsMap(); }
+ bool is_constant() { return !(is_bitset() || is_class() || is_union()); }
+ bool is_union() { return this->IsFixedArray(); }
+
+ int as_bitset() { return Smi::cast(this)->value(); }
+ Handle<Map> as_class() { return Handle<Map>::cast(handle()); }
+ Handle<HeapObject> as_constant() {
+ ASSERT(is_constant());
+ return Handle<HeapObject>::cast(handle());
+ }
+ Handle<Unioned> as_union() { return Handle<Unioned>::cast(handle()); }
+
+ Handle<Type> handle() { return handle_via_isolate_of(this); }
+ Handle<Type> handle_via_isolate_of(Type* type) {
+ ASSERT(type->IsHeapObject());
+ return v8::internal::handle(this, HeapObject::cast(type)->GetIsolate());
+ }
+
+ static Type* from_bitset(int bitset) {
+ return static_cast<Type*>(Object::cast(Smi::FromInt(bitset)));
+ }
+ static Type* from_handle(Handle<HeapObject> handle) {
+ return static_cast<Type*>(Object::cast(*handle));
+ }
+
+ static Handle<Type> union_get(Handle<Unioned> unioned, int i) {
+ Type* type = static_cast<Type*>(unioned->get(i));
+ ASSERT(!type->is_union());
+ return type->handle_via_isolate_of(from_handle(unioned));
+ }
+
+ int LubBitset(); // least upper bound that's a bitset
+ int GlbBitset(); // greatest lower bound that's a bitset
+ bool InUnion(Handle<Unioned> unioned, int current_size);
+ int ExtendUnion(Handle<Unioned> unioned, int current_size);
+};
+
+} } // namespace v8::internal
+
+#endif // V8_TYPES_H_
--- /dev/null
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following
+// disclaimer in the documentation and/or other materials provided
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "cctest.h"
+#include "types.h"
+
+using namespace v8::internal;
+
+// Testing auxiliaries (breaking the Type abstraction).
+static bool IsBitset(Type* type) { return type->IsSmi(); }
+static bool IsClass(Type* type) { return type->IsMap(); }
+static bool IsUnion(Type* type) { return type->IsFixedArray(); }
+static bool IsConstant(Type* type) {
+ return !(IsBitset(type) || IsClass(type) || IsUnion(type));
+}
+
+static int AsBitset(Type* type) { return Smi::cast(type)->value(); }
+static Map* AsClass(Type* type) { return Map::cast(type); }
+static HeapObject* AsConstant(Type* type) { return HeapObject::cast(type); }
+static FixedArray* AsUnion(Type* type) { return FixedArray::cast(type); }
+
+class HandlifiedTypes {
+ public:
+ explicit HandlifiedTypes(Isolate* isolate) :
+ None(Type::None(), isolate),
+ Any(Type::Any(), isolate),
+ Oddball(Type::Oddball(), isolate),
+ Boolean(Type::Boolean(), isolate),
+ Null(Type::Null(), isolate),
+ Undefined(Type::Undefined(), isolate),
+ Number(Type::Number(), isolate),
+ Smi(Type::Smi(), isolate),
+ Double(Type::Double(), isolate),
+ Name(Type::Name(), isolate),
+ UniqueName(Type::UniqueName(), isolate),
+ String(Type::String(), isolate),
+ InternalizedString(Type::InternalizedString(), isolate),
+ Symbol(Type::Symbol(), isolate),
+ Receiver(Type::Receiver(), isolate),
+ Object(Type::Object(), isolate),
+ Array(Type::Array(), isolate),
+ Function(Type::Function(), isolate),
+ Proxy(Type::Proxy(), isolate),
+ object_map(isolate->factory()->NewMap(JS_OBJECT_TYPE, 3 * kPointerSize)),
+ array_map(isolate->factory()->NewMap(JS_ARRAY_TYPE, 4 * kPointerSize)),
+ isolate_(isolate) {
+ object1 = isolate->factory()->NewJSObjectFromMap(object_map);
+ object2 = isolate->factory()->NewJSObjectFromMap(object_map);
+ array = isolate->factory()->NewJSArray(20);
+ ObjectClass = handle(Type::Class(object_map), isolate);
+ ArrayClass = handle(Type::Class(array_map), isolate);
+ ObjectConstant1 = handle(Type::Constant(object1), isolate);
+ ObjectConstant2 = handle(Type::Constant(object2), isolate);
+ ArrayConstant = handle(Type::Constant(array), isolate);
+ }
+
+ Handle<Type> None;
+ Handle<Type> Any;
+ Handle<Type> Oddball;
+ Handle<Type> Boolean;
+ Handle<Type> Null;
+ Handle<Type> Undefined;
+ Handle<Type> Number;
+ Handle<Type> Smi;
+ Handle<Type> Double;
+ Handle<Type> Name;
+ Handle<Type> UniqueName;
+ Handle<Type> String;
+ Handle<Type> InternalizedString;
+ Handle<Type> Symbol;
+ Handle<Type> Receiver;
+ Handle<Type> Object;
+ Handle<Type> Array;
+ Handle<Type> Function;
+ Handle<Type> Proxy;
+
+ Handle<Type> ObjectClass;
+ Handle<Type> ArrayClass;
+ Handle<Type> ObjectConstant1;
+ Handle<Type> ObjectConstant2;
+ Handle<Type> ArrayConstant;
+
+ Handle<Map> object_map;
+ Handle<Map> array_map;
+
+ Handle<JSObject> object1;
+ Handle<JSObject> object2;
+ Handle<JSArray> array;
+
+ Handle<Type> Union(Handle<Type> type1, Handle<Type> type2) {
+ return handle(Type::Union(type1, type2), isolate_);
+ }
+
+ private:
+ Isolate* isolate_;
+};
+
+
+TEST(Bitset) {
+ CcTest::InitializeVM();
+ Isolate* isolate = Isolate::Current();
+ HandleScope scope(isolate);
+ HandlifiedTypes T(isolate);
+
+ CHECK(IsBitset(*T.None));
+ CHECK(IsBitset(*T.Any));
+ CHECK(IsBitset(*T.String));
+ CHECK(IsBitset(*T.Object));
+
+ CHECK(IsBitset(Type::Union(T.String, T.Number)));
+ CHECK(IsBitset(Type::Union(T.String, T.Receiver)));
+ CHECK(IsBitset(Type::Optional(T.Object)));
+
+ CHECK_EQ(0, AsBitset(*T.None));
+ CHECK_EQ(AsBitset(*T.Number) | AsBitset(*T.String),
+ AsBitset(Type::Union(T.String, T.Number)));
+ CHECK_EQ(AsBitset(*T.Receiver),
+ AsBitset(Type::Union(T.Receiver, T.Object)));
+ CHECK_EQ(AsBitset(*T.String) | AsBitset(*T.Undefined),
+ AsBitset(Type::Optional(T.String)));
+}
+
+
+TEST(Class) {
+ CcTest::InitializeVM();
+ Isolate* isolate = Isolate::Current();
+ HandleScope scope(isolate);
+ HandlifiedTypes T(isolate);
+
+ CHECK(IsClass(*T.ObjectClass));
+ CHECK(IsClass(*T.ArrayClass));
+
+ CHECK(*T.object_map == AsClass(*T.ObjectClass));
+ CHECK(*T.array_map == AsClass(*T.ArrayClass));
+}
+
+
+TEST(Constant) {
+ CcTest::InitializeVM();
+ Isolate* isolate = Isolate::Current();
+ HandleScope scope(isolate);
+ HandlifiedTypes T(isolate);
+
+ CHECK(IsConstant(*T.ObjectConstant1));
+ CHECK(IsConstant(*T.ObjectConstant2));
+ CHECK(IsConstant(*T.ArrayConstant));
+
+ CHECK(*T.object1 == AsConstant(*T.ObjectConstant1));
+ CHECK(*T.object2 == AsConstant(*T.ObjectConstant2));
+ CHECK(*T.object1 != AsConstant(*T.ObjectConstant2));
+ CHECK(*T.array == AsConstant(*T.ArrayConstant));
+}
+
+
+static void CheckSub(Handle<Type> type1, Handle<Type> type2) {
+ CHECK(type1->Is(type2));
+ CHECK(!type2->Is(type1));
+ if (IsBitset(*type1) && IsBitset(*type2)) {
+ CHECK_NE(AsBitset(*type1), AsBitset(*type2));
+ }
+}
+
+static void CheckUnordered(Handle<Type> type1, Handle<Type> type2) {
+ CHECK(!type1->Is(type2));
+ CHECK(!type2->Is(type1));
+ if (IsBitset(*type1) && IsBitset(*type2)) {
+ CHECK_NE(AsBitset(*type1), AsBitset(*type2));
+ }
+}
+
+TEST(Is) {
+ CcTest::InitializeVM();
+ Isolate* isolate = Isolate::Current();
+ HandleScope scope(isolate);
+ HandlifiedTypes T(isolate);
+
+ // Reflexivity
+ CHECK(T.None->Is(T.None));
+ CHECK(T.Any->Is(T.Any));
+ CHECK(T.Object->Is(T.Object));
+
+ CHECK(T.ObjectClass->Is(T.ObjectClass));
+ CHECK(T.ObjectConstant1->Is(T.ObjectConstant1));
+
+ // Symmetry and Transitivity
+ CheckSub(T.None, T.Number);
+ CheckSub(T.None, T.Any);
+
+ CheckSub(T.Oddball, T.Any);
+ CheckSub(T.Boolean, T.Oddball);
+ CheckSub(T.Null, T.Oddball);
+ CheckSub(T.Undefined, T.Oddball);
+ CheckUnordered(T.Boolean, T.Null);
+ CheckUnordered(T.Undefined, T.Null);
+ CheckUnordered(T.Boolean, T.Undefined);
+
+ CheckSub(T.Number, T.Any);
+ CheckSub(T.Smi, T.Number);
+ CheckSub(T.Double, T.Number);
+ CheckUnordered(T.Smi, T.Double);
+
+ CheckSub(T.Name, T.Any);
+ CheckSub(T.UniqueName, T.Any);
+ CheckSub(T.UniqueName, T.Name);
+ CheckSub(T.String, T.Name);
+ CheckSub(T.InternalizedString, T.String);
+ CheckSub(T.InternalizedString, T.UniqueName);
+ CheckSub(T.InternalizedString, T.Name);
+ CheckSub(T.Symbol, T.UniqueName);
+ CheckSub(T.Symbol, T.Name);
+ CheckUnordered(T.String, T.UniqueName);
+ CheckUnordered(T.String, T.Symbol);
+ CheckUnordered(T.InternalizedString, T.Symbol);
+
+ CheckSub(T.Receiver, T.Any);
+ CheckSub(T.Object, T.Any);
+ CheckSub(T.Object, T.Receiver);
+ CheckSub(T.Array, T.Object);
+ CheckSub(T.Function, T.Object);
+ CheckSub(T.Proxy, T.Receiver);
+ CheckUnordered(T.Object, T.Proxy);
+ CheckUnordered(T.Array, T.Function);
+
+ // Structured subtyping
+ CheckSub(T.ObjectClass, T.Object);
+ CheckSub(T.ArrayClass, T.Object);
+ CheckUnordered(T.ObjectClass, T.ArrayClass);
+
+ CheckSub(T.ObjectConstant1, T.Object);
+ CheckSub(T.ObjectConstant2, T.Object);
+ CheckSub(T.ArrayConstant, T.Object);
+ CheckSub(T.ArrayConstant, T.Array);
+ CheckUnordered(T.ObjectConstant1, T.ObjectConstant2);
+ CheckUnordered(T.ObjectConstant1, T.ArrayConstant);
+
+ CheckUnordered(T.ObjectConstant1, T.ObjectClass);
+ CheckUnordered(T.ObjectConstant2, T.ObjectClass);
+ CheckUnordered(T.ObjectConstant1, T.ArrayClass);
+ CheckUnordered(T.ObjectConstant2, T.ArrayClass);
+ CheckUnordered(T.ArrayConstant, T.ObjectClass);
+}
+
+
+static void CheckOverlap(Handle<Type> type1, Handle<Type> type2) {
+ CHECK(type1->Maybe(type2));
+ CHECK(type2->Maybe(type1));
+ if (IsBitset(*type1) && IsBitset(*type2)) {
+ CHECK_NE(0, AsBitset(*type1) & AsBitset(*type2));
+ }
+}
+
+static void CheckDisjoint(Handle<Type> type1, Handle<Type> type2) {
+ CHECK(!type1->Is(type2));
+ CHECK(!type2->Is(type1));
+ CHECK(!type1->Maybe(type2));
+ CHECK(!type2->Maybe(type1));
+ if (IsBitset(*type1) && IsBitset(*type2)) {
+ CHECK_EQ(0, AsBitset(*type1) & AsBitset(*type2));
+ }
+}
+
+TEST(Maybe) {
+ CcTest::InitializeVM();
+ Isolate* isolate = Isolate::Current();
+ HandleScope scope(isolate);
+ HandlifiedTypes T(isolate);
+
+ CheckOverlap(T.Any, T.Any);
+ CheckOverlap(T.Object, T.Object);
+
+ CheckOverlap(T.Oddball, T.Any);
+ CheckOverlap(T.Boolean, T.Oddball);
+ CheckOverlap(T.Null, T.Oddball);
+ CheckOverlap(T.Undefined, T.Oddball);
+ CheckDisjoint(T.Boolean, T.Null);
+ CheckDisjoint(T.Undefined, T.Null);
+ CheckDisjoint(T.Boolean, T.Undefined);
+
+ CheckOverlap(T.Number, T.Any);
+ CheckOverlap(T.Smi, T.Number);
+ CheckOverlap(T.Double, T.Number);
+ CheckDisjoint(T.Smi, T.Double);
+
+ CheckOverlap(T.Name, T.Any);
+ CheckOverlap(T.UniqueName, T.Any);
+ CheckOverlap(T.UniqueName, T.Name);
+ CheckOverlap(T.String, T.Name);
+ CheckOverlap(T.InternalizedString, T.String);
+ CheckOverlap(T.InternalizedString, T.UniqueName);
+ CheckOverlap(T.InternalizedString, T.Name);
+ CheckOverlap(T.Symbol, T.UniqueName);
+ CheckOverlap(T.Symbol, T.Name);
+ CheckOverlap(T.String, T.UniqueName);
+ CheckDisjoint(T.String, T.Symbol);
+ CheckDisjoint(T.InternalizedString, T.Symbol);
+
+ CheckOverlap(T.Receiver, T.Any);
+ CheckOverlap(T.Object, T.Any);
+ CheckOverlap(T.Object, T.Receiver);
+ CheckOverlap(T.Array, T.Object);
+ CheckOverlap(T.Function, T.Object);
+ CheckOverlap(T.Proxy, T.Receiver);
+ CheckDisjoint(T.Object, T.Proxy);
+ CheckDisjoint(T.Array, T.Function);
+
+ CheckOverlap(T.ObjectClass, T.Object);
+ CheckOverlap(T.ArrayClass, T.Object);
+ CheckOverlap(T.ObjectClass, T.ObjectClass);
+ CheckOverlap(T.ArrayClass, T.ArrayClass);
+ CheckDisjoint(T.ObjectClass, T.ArrayClass);
+
+ CheckOverlap(T.ObjectConstant1, T.Object);
+ CheckOverlap(T.ObjectConstant2, T.Object);
+ CheckOverlap(T.ArrayConstant, T.Object);
+ CheckOverlap(T.ArrayConstant, T.Array);
+ CheckOverlap(T.ObjectConstant1, T.ObjectConstant1);
+ CheckDisjoint(T.ObjectConstant1, T.ObjectConstant2);
+ CheckDisjoint(T.ObjectConstant1, T.ArrayConstant);
+
+ CheckDisjoint(T.ObjectConstant1, T.ObjectClass);
+ CheckDisjoint(T.ObjectConstant2, T.ObjectClass);
+ CheckDisjoint(T.ObjectConstant1, T.ArrayClass);
+ CheckDisjoint(T.ObjectConstant2, T.ArrayClass);
+ CheckDisjoint(T.ArrayConstant, T.ObjectClass);
+}
+
+
+static void CheckEqual(Handle<Type> type1, Handle<Type> type2) {
+ CHECK_EQ(IsBitset(*type1), IsBitset(*type2));
+ CHECK_EQ(IsClass(*type1), IsClass(*type2));
+ CHECK_EQ(IsConstant(*type1), IsConstant(*type2));
+ CHECK_EQ(IsUnion(*type1), IsUnion(*type2));
+ if (IsBitset(*type1)) {
+ CHECK_EQ(AsBitset(*type1), AsBitset(*type2));
+ } else if (IsClass(*type1)) {
+ CHECK_EQ(AsClass(*type1), AsClass(*type2));
+ } else if (IsConstant(*type1)) {
+ CHECK_EQ(AsConstant(*type1), AsConstant(*type2));
+ } else if (IsUnion(*type1)) {
+ CHECK_EQ(AsUnion(*type1)->length(), AsUnion(*type2)->length());
+ }
+ CHECK(type1->Is(type2));
+ CHECK(type2->Is(type1));
+}
+
+TEST(Union) {
+ CcTest::InitializeVM();
+ Isolate* isolate = Isolate::Current();
+ HandleScope scope(isolate);
+ HandlifiedTypes T(isolate);
+
+ // Bitset-bitset
+ CHECK(IsBitset(Type::Union(T.Object, T.Number)));
+ CHECK(IsBitset(Type::Union(T.Object, T.Object)));
+ CHECK(IsBitset(Type::Union(T.Any, T.None)));
+
+ CheckEqual(T.Union(T.None, T.Number), T.Number);
+ CheckEqual(T.Union(T.Object, T.Proxy), T.Receiver);
+ CheckEqual(T.Union(T.Number, T.String), T.Union(T.String, T.Number));
+ CheckSub(T.Union(T.Number, T.String), T.Any);
+
+ // Class-class
+ CHECK(IsClass(Type::Union(T.ObjectClass, T.ObjectClass)));
+ CHECK(IsUnion(Type::Union(T.ObjectClass, T.ArrayClass)));
+
+ CheckEqual(T.Union(T.ObjectClass, T.ObjectClass), T.ObjectClass);
+ CheckSub(T.ObjectClass, T.Union(T.ObjectClass, T.ArrayClass));
+ CheckSub(T.ArrayClass, T.Union(T.ObjectClass, T.ArrayClass));
+ CheckSub(T.Union(T.ObjectClass, T.ArrayClass), T.Object);
+ CheckUnordered(T.Union(T.ObjectClass, T.ArrayClass), T.Array);
+ CheckOverlap(T.Union(T.ObjectClass, T.ArrayClass), T.Array);
+ CheckDisjoint(T.Union(T.ObjectClass, T.ArrayClass), T.Number);
+
+ // Constant-constant
+ CHECK(IsConstant(Type::Union(T.ObjectConstant1, T.ObjectConstant1)));
+ CHECK(IsUnion(Type::Union(T.ObjectConstant1, T.ObjectConstant2)));
+
+ CheckEqual(T.Union(T.ObjectConstant1, T.ObjectConstant1), T.ObjectConstant1);
+ CheckSub(T.ObjectConstant1, T.Union(T.ObjectConstant1, T.ObjectConstant2));
+ CheckSub(T.ObjectConstant2, T.Union(T.ObjectConstant1, T.ObjectConstant2));
+ CheckSub(T.Union(T.ObjectConstant1, T.ObjectConstant2), T.Object);
+ CheckUnordered(T.Union(T.ObjectConstant1, T.ObjectConstant2), T.ObjectClass);
+ CheckUnordered(T.Union(T.ObjectConstant1, T.ArrayConstant), T.Array);
+ CheckOverlap(T.Union(T.ObjectConstant1, T.ArrayConstant), T.Array);
+ CheckDisjoint(T.Union(T.ObjectConstant1, T.ArrayConstant), T.Number);
+ CheckDisjoint(T.Union(T.ObjectConstant1, T.ArrayConstant), T.ObjectClass);
+
+ // Bitset-class
+ CHECK(IsBitset(Type::Union(T.ObjectClass, T.Object)));
+ CHECK(IsUnion(Type::Union(T.ObjectClass, T.Number)));
+
+ CheckEqual(T.Union(T.ObjectClass, T.Object), T.Object);
+ CheckSub(T.Union(T.ObjectClass, T.Number), T.Any);
+ CheckSub(T.Union(T.ObjectClass, T.Smi), T.Union(T.Object, T.Number));
+ CheckSub(T.Union(T.ObjectClass, T.Array), T.Object);
+ CheckUnordered(T.Union(T.ObjectClass, T.String), T.Array);
+ CheckOverlap(T.Union(T.ObjectClass, T.String), T.Object);
+ CheckDisjoint(T.Union(T.ObjectClass, T.String), T.Number);
+
+ // Bitset-constant
+ CHECK(IsBitset(Type::Union(T.ObjectConstant1, T.Object)));
+ CHECK(IsUnion(Type::Union(T.ObjectConstant2, T.Number)));
+
+ CheckEqual(T.Union(T.ObjectConstant1, T.Object), T.Object);
+ CheckSub(T.Union(T.ObjectConstant1, T.Number), T.Any);
+ CheckSub(T.Union(T.ObjectConstant1, T.Smi), T.Union(T.Object, T.Number));
+ CheckSub(T.Union(T.ObjectConstant1, T.Array), T.Object);
+ CheckUnordered(T.Union(T.ObjectConstant1, T.String), T.Array);
+ CheckOverlap(T.Union(T.ObjectConstant1, T.String), T.Object);
+ CheckDisjoint(T.Union(T.ObjectConstant1, T.String), T.Number);
+
+ // Class-constant
+ CHECK(IsUnion(Type::Union(T.ObjectConstant1, T.ObjectClass)));
+ CHECK(IsUnion(Type::Union(T.ArrayClass, T.ObjectConstant2)));
+
+ CheckSub(T.Union(T.ObjectConstant1, T.ArrayClass), T.Object);
+ CheckSub(T.ObjectConstant1, T.Union(T.ObjectConstant1, T.ArrayClass));
+ CheckSub(T.ArrayClass, T.Union(T.ObjectConstant1, T.ArrayClass));
+ CheckUnordered(T.ObjectClass, T.Union(T.ObjectConstant1, T.ArrayClass));
+ CheckSub(
+ T.Union(T.ObjectConstant1, T.ArrayClass), T.Union(T.Array, T.Object));
+ CheckUnordered(T.Union(T.ObjectConstant1, T.ArrayClass), T.ArrayConstant);
+ CheckDisjoint(T.Union(T.ObjectConstant1, T.ArrayClass), T.ObjectConstant2);
+ CheckDisjoint(T.Union(T.ObjectConstant1, T.ArrayClass), T.ObjectClass);
+
+ // Bitset-union
+ CHECK(IsBitset(
+ Type::Union(T.Object, T.Union(T.ObjectConstant1, T.ObjectClass))));
+ CHECK(IsUnion(
+ Type::Union(T.Union(T.ArrayClass, T.ObjectConstant2), T.Number)));
+
+ CheckEqual(
+ T.Union(T.Object, T.Union(T.ObjectConstant1, T.ObjectClass)),
+ T.Object);
+ CheckEqual(
+ T.Union(T.Union(T.ArrayClass, T.ObjectConstant1), T.Number),
+ T.Union(T.ObjectConstant1, T.Union(T.Number, T.ArrayClass)));
+ CheckSub(
+ T.Double,
+ T.Union(T.Union(T.ArrayClass, T.ObjectConstant1), T.Number));
+ CheckSub(
+ T.ObjectConstant1,
+ T.Union(T.Union(T.ArrayClass, T.ObjectConstant1), T.Double));
+ CheckSub(
+ T.Union(T.Union(T.ArrayClass, T.ObjectConstant1), T.Double),
+ T.Any);
+ CheckSub(
+ T.Union(T.Union(T.ArrayClass, T.ObjectConstant1), T.Double),
+ T.Union(T.ObjectConstant1, T.Union(T.Number, T.ArrayClass)));
+
+ // Class-union
+ CHECK(IsUnion(
+ Type::Union(T.Union(T.ArrayClass, T.ObjectConstant2), T.ArrayClass)));
+ CHECK(IsUnion(
+ Type::Union(T.Union(T.ArrayClass, T.ObjectConstant2), T.ObjectClass)));
+
+ CheckEqual(
+ T.Union(T.ObjectClass, T.Union(T.ObjectConstant1, T.ObjectClass)),
+ T.Union(T.ObjectClass, T.ObjectConstant1));
+ CheckSub(
+ T.Union(T.ObjectClass, T.Union(T.ObjectConstant1, T.ObjectClass)),
+ T.Object);
+ CheckEqual(
+ T.Union(T.Union(T.ArrayClass, T.ObjectConstant2), T.ArrayClass),
+ T.Union(T.ArrayClass, T.ObjectConstant2));
+
+ // Constant-union
+ CHECK(IsUnion(Type::Union(
+ T.ObjectConstant1, T.Union(T.ObjectConstant1, T.ObjectConstant2))));
+ CHECK(IsUnion(Type::Union(
+ T.Union(T.ArrayConstant, T.ObjectClass), T.ObjectConstant1)));
+ CHECK(IsUnion(Type::Union(
+ T.Union(T.ArrayConstant, T.ObjectConstant2), T.ObjectConstant1)));
+
+ CheckEqual(
+ T.Union(T.ObjectConstant1, T.Union(T.ObjectConstant1, T.ObjectConstant2)),
+ T.Union(T.ObjectConstant2, T.ObjectConstant1));
+ CheckEqual(
+ T.Union(T.Union(T.ArrayConstant, T.ObjectConstant2), T.ObjectConstant1),
+ T.Union(T.ObjectConstant2, T.Union(T.ArrayConstant, T.ObjectConstant1)));
+
+ // Union-union
+ CHECK(IsBitset(
+ Type::Union(T.Union(T.Number, T.ArrayClass), T.Union(T.Smi, T.Array))));
+
+ CheckEqual(
+ T.Union(T.Union(T.ObjectConstant2, T.ObjectConstant1),
+ T.Union(T.ObjectConstant1, T.ObjectConstant2)),
+ T.Union(T.ObjectConstant2, T.ObjectConstant1));
+ CheckEqual(
+ T.Union(T.Union(T.ObjectConstant2, T.ArrayConstant),
+ T.Union(T.ObjectConstant1, T.ArrayConstant)),
+ T.Union(T.Union(T.ObjectConstant1, T.ObjectConstant2), T.ArrayConstant));
+ CheckEqual(
+ T.Union(T.Union(T.Number, T.ArrayClass), T.Union(T.Smi, T.Array)),
+ T.Union(T.Number, T.Array));
+}
projects / platform / upstream / v8.git / commitdiff