Fix computed properties on object literals with a double as propertyname.

src/x64/full-codegen-x64.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"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 1661 matching lines @@
             PrepareForBailoutForId(key->id(), NO_REGISTERS);
           } else {
             VisitForEffect(value);
           }
           break;
         }
         __ Push(Operand(rsp, 0));  // Duplicate receiver.
         VisitForStackValue(key);
         VisitForStackValue(value);
         if (property->emit_store()) {
-          __ Push(Smi::FromInt(NONE));    // PropertyAttributes
-          __ CallRuntime(Runtime::kAddProperty, 4);
+          __ Push(Smi::FromInt(SLOPPY));  // Strict mode
+          __ CallRuntime(Runtime::kSetProperty, 4);
         } else {
           __ Drop(3);
         }
         break;
       case ObjectLiteral::Property::PROTOTYPE:
         __ Push(Operand(rsp, 0));  // Duplicate receiver.
         VisitForStackValue(value);
         if (property->emit_store()) {
           __ CallRuntime(Runtime::kSetPrototype, 2);
         } else {
@@ skipping 3118 matching lines @@
   ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(),
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64