Always use the StoreFieldStub to do the actual storing.

src/arm64/stub-cache-arm64.cc

Index: src/arm64/stub-cache-arm64.cc
diff --git a/src/arm64/stub-cache-arm64.cc b/src/arm64/stub-cache-arm64.cc
index 92fbecf7524e90d881f6d3dcba9c4ae72c9127ed..b7d43a4771a9d1dba5bf1caaf0dcb4848cf89333 100644
--- a/src/arm64/stub-cache-arm64.cc
+++ b/src/arm64/stub-cache-arm64.cc
@@ -531,77 +531,28 @@ void NamedStoreHandlerCompiler::GenerateStoreTransition(
 }
 
 
-// Generate StoreField code, value is passed in x0 register.
-// When leaving generated code after success, the receiver_reg and name_reg may
-// be clobbered. Upon branch to miss_label, the receiver and name registers have
-// their original values.
-void NamedStoreHandlerCompiler::GenerateStoreField(
-    Handle<JSObject> object, LookupResult* lookup, Register receiver_reg,
-    Register name_reg, Register value_reg, Register scratch1, Register scratch2,
-    Label* miss_label) {
-  // x0 : value
-  Label exit;
-
-  // Stub never generated for objects that require access checks.
-  DCHECK(!object->IsAccessCheckNeeded());
-  DCHECK(!object->IsJSGlobalProxy());
-
-  FieldIndex index = lookup->GetFieldIndex();
-
+void NamedStoreHandlerCompiler::GenerateStoreField(LookupResult* lookup,
+                                                   Register value_reg,
+                                                   Label* miss_label) {
   DCHECK(lookup->representation().IsHeapObject());
   __ JumpIfSmi(value_reg, miss_label);
-  HeapType* field_type = lookup->GetFieldType();
-  HeapType::Iterator<Map> it = field_type->Classes();
-  if (!it.Done()) {
-    __ Ldr(scratch1, FieldMemOperand(value_reg, HeapObject::kMapOffset));
-    Label do_store;
-    while (true) {
-      __ CompareMap(scratch1, it.Current());
-      it.Advance();
-      if (it.Done()) {
-        __ B(ne, miss_label);
-        break;
-      }
-      __ B(eq, &do_store);
+  HeapType::Iterator<Map> it = lookup->GetFieldType()->Classes();
+  __ Ldr(scratch1(), FieldMemOperand(value_reg, HeapObject::kMapOffset));
+  Label do_store;
+  while (true) {
+    __ CompareMap(scratch1(), it.Current());
+    it.Advance();
+    if (it.Done()) {
+      __ B(ne, miss_label);
+      break;
     }
-    __ Bind(&do_store);
+    __ B(eq, &do_store);
   }
+  __ Bind(&do_store);
 
-  if (index.is_inobject()) {
-    // Set the property straight into the object.
-    __ Str(value_reg, FieldMemOperand(receiver_reg, index.offset()));
-
-    // Skip updating write barrier if storing a smi.
-    __ JumpIfSmi(value_reg, &exit);
-
-    // Update the write barrier for the array address.
-    // Pass the now unused name_reg as a scratch register.
-    __ Mov(name_reg, value_reg);
-    __ RecordWriteField(receiver_reg, index.offset(), name_reg, scratch1,
-                        kLRHasNotBeenSaved, kDontSaveFPRegs,
-                        EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  } else {
-    // Write to the properties array.
-    // Get the properties array
-    __ Ldr(scratch1,
-           FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
-    __ Str(value_reg, FieldMemOperand(scratch1, index.offset()));
-
-    // Skip updating write barrier if storing a smi.
-    __ JumpIfSmi(value_reg, &exit);
-
-    // Update the write barrier for the array address.
-    // Ok to clobber receiver_reg and name_reg, since we return.
-    __ Mov(name_reg, value_reg);
-    __ RecordWriteField(scratch1, index.offset(), name_reg, receiver_reg,
-                        kLRHasNotBeenSaved, kDontSaveFPRegs,
-                        EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-  }
-
-  __ Bind(&exit);
-  // Return the value (register x0).
-  DCHECK(value_reg.is(x0));
-  __ Ret();
+  StoreFieldStub stub(isolate(), lookup->GetFieldIndex(),
+                      lookup->representation());
+  GenerateTailCall(masm(), stub.GetCode());
 }