Support Float64Arrays

src/hydrogen-instructions.h

 // Copyright 2011 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
@@ skipping 3228 matching lines @@
 };
 
 
 class HLoadKeyedSpecializedArrayElement: public HBinaryOperation {
  public:
   HLoadKeyedSpecializedArrayElement(HValue* external_elements,
                                     HValue* key,
                                     ExternalArrayType array_type)
       : HBinaryOperation(external_elements, key),
         array_type_(array_type) {
-    if (array_type == kExternalFloatArray) {
+    if (array_type == kExternalFloatArray ||
+        array_type == kExternalDoubleArray) {
       set_representation(Representation::Double());
     } else {
       set_representation(Representation::Integer32());
     }
     SetFlag(kDependsOnSpecializedArrayElements);
     // Native code could change the specialized array.
     SetFlag(kDependsOnCalls);
     SetFlag(kUseGVN);
   }
 
@@ skipping 171 matching lines @@
     SetOperandAt(1, key);
     SetOperandAt(2, val);
   }
 
   virtual void PrintDataTo(StringStream* stream);
 
   virtual Representation RequiredInputRepresentation(int index) const {
     if (index == 0) {
       return Representation::External();
     } else {
-      if (index == 2 && array_type() == kExternalFloatArray) {
+      if (index == 2 && (array_type() == kExternalFloatArray ||
+                         array_type() == kExternalDoubleArray)) {
         return Representation::Double();
       } else {
         return Representation::Integer32();
       }
     }
   }
 
   HValue* external_pointer() { return OperandAt(0); }
   HValue* key() { return OperandAt(1); }
   HValue* value() { return OperandAt(2); }
@@ skipping 325 matching lines @@
   HValue* object() { return left(); }
   HValue* key() { return right(); }
 };
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_