Revert "Reland "VM: Handle null-comparisons in the flow graph type propagation""

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/become.h"
@@ skipping 1591 matching lines @@
     cls = Class::New<Instance>(kIllegalCid);
     RegisterClass(cls, Symbols::Int(), core_lib);
     cls.set_num_type_arguments(0);
     cls.set_num_own_type_arguments(0);
     cls.set_is_prefinalized();
     pending_classes.Add(cls);
     type = Type::NewNonParameterizedType(cls);
     object_store->set_int_type(type);
 
     cls = Class::New<Instance>(kIllegalCid);
-    RegisterPrivateClass(cls, Symbols::Int64(), core_lib);
-    cls.set_num_type_arguments(0);
-    cls.set_num_own_type_arguments(0);
-    cls.set_is_prefinalized();
-    pending_classes.Add(cls);
-    type = Type::NewNonParameterizedType(cls);
-    object_store->set_int64_type(type);
-
-    cls = Class::New<Instance>(kIllegalCid);
     RegisterClass(cls, Symbols::Double(), core_lib);
     cls.set_num_type_arguments(0);
     cls.set_num_own_type_arguments(0);
     cls.set_is_prefinalized();
     pending_classes.Add(cls);
     type = Type::NewNonParameterizedType(cls);
     object_store->set_double_type(type);
 
     name = Symbols::_String().raw();
     cls = Class::New<Instance>(kIllegalCid);
@@ skipping 14814 matching lines @@
          (type_class() == Isolate::Current()->object_store()->bool_class());
 }
 
 
 bool AbstractType::IsIntType() const {
   return !IsFunctionType() && HasResolvedTypeClass() &&
          (type_class() == Type::Handle(Type::IntType()).type_class());
 }
 
 
-bool AbstractType::IsInt64Type() const {
-  return !IsFunctionType() && HasResolvedTypeClass() &&
-         (type_class() == Type::Handle(Type::Int64Type()).type_class());
-}
-
-
 bool AbstractType::IsDoubleType() const {
   return !IsFunctionType() && HasResolvedTypeClass() &&
          (type_class() == Type::Handle(Type::Double()).type_class());
 }
 
 
 bool AbstractType::IsFloat32x4Type() const {
   return !IsFunctionType() && HasResolvedTypeClass() &&
          (type_class() == Type::Handle(Type::Float32x4()).type_class());
 }
@@ skipping 225 matching lines @@
 RawType* Type::BoolType() {
   return Isolate::Current()->object_store()->bool_type();
 }
 
 
 RawType* Type::IntType() {
   return Isolate::Current()->object_store()->int_type();
 }
 
 
-RawType* Type::Int64Type() {
-  return Isolate::Current()->object_store()->int64_type();
-}
-
-
 RawType* Type::SmiType() {
   return Isolate::Current()->object_store()->smi_type();
 }
 
 
 RawType* Type::MintType() {
   return Isolate::Current()->object_store()->mint_type();
 }
 
 
@@ skipping 6407 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart