Better typing and type verification

src/types.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/types.h"
 
 #include "src/ostreams.h"
 #include "src/types-inl.h"
 
 namespace v8 {
@@ skipping 229 matching lines @@
       // because it means that the template isn't actually parametric.
       // Also, it doesn't apply elsewhere. 8-(
       // We ought to find a cleaner solution for compiling stubs parameterised
       // over type or class variables, esp ones with bounds...
       return kDetectable;
     case DECLARED_ACCESSOR_INFO_TYPE:
     case EXECUTABLE_ACCESSOR_INFO_TYPE:
     case SHARED_FUNCTION_INFO_TYPE:
     case ACCESSOR_PAIR_TYPE:
     case FIXED_ARRAY_TYPE:
+    case BYTE_ARRAY_TYPE:
     case FOREIGN_TYPE:
     case CODE_TYPE:
       return kInternal & kTaggedPtr;
     default:
       UNREACHABLE();
       return kNone;
   }
 }
 
 
@@ skipping 169 matching lines @@
     }
     return false;
   }
 
   if (that->IsRange()) {
     return (this->IsRange() && Contains(that->AsRange(), this->AsRange()))
         || (this->IsConstant() &&
             Contains(that->AsRange(), *this->AsConstant()->Value()));
   }
   if (this->IsRange()) return false;
+
   return this->SimplyEquals(that);
 }
 
 
 template<class Config>
 bool TypeImpl<Config>::NowIs(TypeImpl* that) {
   DisallowHeapAllocation no_allocation;
 
   // TODO(rossberg): this is incorrect for
   //   Union(Constant(V), T)->NowIs(Class(M))
@@ skipping 635 matching lines @@
 template class TypeImpl<HeapTypeConfig>::Iterator<i::Object>;
 
 template TypeImpl<ZoneTypeConfig>::TypeHandle
   TypeImpl<ZoneTypeConfig>::Convert<HeapType>(
     TypeImpl<HeapTypeConfig>::TypeHandle, TypeImpl<ZoneTypeConfig>::Region*);
 template TypeImpl<HeapTypeConfig>::TypeHandle
   TypeImpl<HeapTypeConfig>::Convert<Type>(
     TypeImpl<ZoneTypeConfig>::TypeHandle, TypeImpl<HeapTypeConfig>::Region*);
 
 } }  // namespace v8::internal