[stubs] Port LoadFieldStub to TF

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index cfb88672c69e7fa3a4ffbf36a8a3ce99bcbfd280..d4faf5215b5afbbc02937dcac8112ddacc3bc88e 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -90,6 +90,21 @@ void LoadDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void LoadFieldDescriptor::InitializePlatformIndependent(
+    CallInterfaceDescriptorData* data) {
+  // kReceiver, kSmiHandler
+  MachineType machine_types[] = {MachineType::AnyTagged(),
+                                 MachineType::AnyTagged()};
+  data->InitializePlatformIndependent(arraysize(machine_types), 0,
+                                      machine_types);
+}
+
+void LoadFieldDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {ReceiverRegister(), SmiHandlerRegister()};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 void LoadGlobalDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kName, kSlot
@@ -237,6 +252,19 @@ void MathPowIntegerDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+const Register LoadFieldDescriptor::ReceiverRegister() {
+  // Reuse the register from the LoadDescriptor, since given the
+  // LoadFieldDescriptor's usage, it doesn't matter exactly which registers are
+  // used to pass parameters in.
+  return LoadDescriptor::ReceiverRegister();
+}
+const Register LoadFieldDescriptor::SmiHandlerRegister() {
+  // Reuse the register from the LoadDescriptor, since given the
+  // LoadFieldDescriptor's usage, it doesn't matter exactly which registers are
+  // used to pass parameters in.
+  return LoadDescriptor::NameRegister();
+}
+
 void LoadWithVectorDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kReceiver, kName, kSlot, kVector