Add missing verified write on x64; extend test coverage

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2013, 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/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intermediate_language.h"
 
 #include "vm/dart_entry.h"
@@ skipping 1235 matching lines @@
   if ((index_scale() == 1) && index.IsRegister()) {
     __ SmiUntag(index.reg());
   }
   switch (class_id()) {
     case kArrayCid:
       if (ShouldEmitStoreBarrier()) {
         Register value = locs()->in(2).reg();
         __ StoreIntoObject(array, element_address, value);
       } else if (locs()->in(2).IsConstant()) {
         const Object& constant = locs()->in(2).constant();
-        __ StoreObject(element_address, constant, PP);
+        __ StoreIntoObjectNoBarrier(array, element_address, constant, PP);
       } else {
         Register value = locs()->in(2).reg();
         __ StoreIntoObjectNoBarrier(array, element_address, value);
       }
       break;
     case kTypedDataInt8ArrayCid:
     case kTypedDataUint8ArrayCid:
     case kExternalTypedDataUint8ArrayCid:
     case kOneByteStringCid:
       if (locs()->in(2).IsConstant()) {
@@ skipping 583 matching lines @@
   }
 
   if (ShouldEmitStoreBarrier()) {
     Register value_reg = locs()->in(1).reg();
     __ StoreIntoObject(instance_reg,
                        FieldAddress(instance_reg, offset_in_bytes_),
                        value_reg,
                        CanValueBeSmi());
   } else {
     if (locs()->in(1).IsConstant()) {
-      __ StoreObject(FieldAddress(instance_reg, offset_in_bytes_),
-                     locs()->in(1).constant(), PP);
+      __ StoreIntoObjectNoBarrier(instance_reg,
+                                  FieldAddress(instance_reg, offset_in_bytes_),
+                                  locs()->in(1).constant(), PP);
     } else {
       Register value_reg = locs()->in(1).reg();
       __ StoreIntoObjectNoBarrier(instance_reg,
           FieldAddress(instance_reg, offset_in_bytes_), value_reg);
     }
   }
   __ Bind(&skip_store);
 }
 
 
@@ skipping 4396 matching lines @@
   __ movq(R10, Immediate(kInvalidObjectPointer));
   __ movq(RBX, Immediate(kInvalidObjectPointer));
 #endif
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64