Double field values need sNaN -> qNaN canonicalization.

src/hydrogen-instructions.cc

 // Copyright 2012 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/v8.h"
 
 #include "src/base/bits.h"
 #include "src/double.h"
 #include "src/factory.h"
 #include "src/hydrogen-infer-representation.h"
@@ skipping 4045 matching lines @@
   switch (value()->opcode()) {
     case kLoadKeyed: {
       ElementsKind load_kind = HLoadKeyed::cast(value())->elements_kind();
       return IsExternalFloatOrDoubleElementsKind(load_kind) ||
              IsFixedFloatElementsKind(load_kind);
     }
     case kChange: {
       Representation from = HChange::cast(value())->from();
       return from.IsTagged() || from.IsHeapObject();
     }
-    case kPhi:
+    case kLoadNamedField:
+    case kPhi: {
       // Better safe than sorry...
       return true;
+    }
     default:
       return false;
   }
 }
 
 
 #define H_CONSTANT_INT(val)                                                    \
 HConstant::New(zone, context, static_cast<int32_t>(val))
 #define H_CONSTANT_DOUBLE(val)                                                 \
 HConstant::New(zone, context, static_cast<double>(val))
@@ skipping 744 matching lines @@
       break;
     case HObjectAccess::kExternalMemory:
       os << "[external-memory]";
       break;
   }
 
   return os << "@" << access.offset();
 }
 
 } }  // namespace v8::internal