ARM/ARM64: Optimise HLoadNamedField and HStoreNamedField.

src/arm64/lithium-arm64.cc

Index: src/arm64/lithium-arm64.cc
diff --git a/src/arm64/lithium-arm64.cc b/src/arm64/lithium-arm64.cc
index 8446edfae79fc88bb074131ffdabcba86a721788..0f82d9017a2f3fae8b248edf57036484f27bfca0 100644
--- a/src/arm64/lithium-arm64.cc
+++ b/src/arm64/lithium-arm64.cc
@@ -1725,7 +1725,11 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 
 LInstruction* LChunkBuilder::DoLoadNamedField(HLoadNamedField* instr) {
   LOperand* object = UseRegisterAtStart(instr->object());
-  return DefineAsRegister(new(zone()) LLoadNamedField(object));
+  HValue* h_obj_properties = instr->object_properties();
+  LOperand* obj_properties =
+      (h_obj_properties != NULL) ? UseRegisterAtStart(h_obj_properties) : NULL;
+
+  return DefineAsRegister(new(zone()) LLoadNamedField(object, obj_properties));
 }
 
 
@@ -2395,7 +2399,12 @@ LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
     temp0 = TempRegister();
   }
 
-  return new(zone()) LStoreNamedField(object, value, temp0, temp1);
+  HValue* h_obj_properties = instr->object_properties();
+  LOperand* obj_properties =
+      (h_obj_properties != NULL) ? UseRegister(h_obj_properties) : NULL;
+
+  return new(zone())
+      LStoreNamedField(object, value, temp0, temp1, obj_properties);
 }