[builtins] Introduce new TFC macro and auto-generate TFS descriptors

src/s390/interface-descriptors-s390.cc

Index: src/s390/interface-descriptors-s390.cc
diff --git a/src/s390/interface-descriptors-s390.cc b/src/s390/interface-descriptors-s390.cc
index da0b1d4583ff25d7988569a9ecc9b8915ba3dccc..5606f2388be7a72749c53e4c6588401027a33587 100644
--- a/src/s390/interface-descriptors-s390.cc
+++ b/src/s390/interface-descriptors-s390.cc
@@ -269,30 +269,6 @@ void StringAddDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
-void KeyedDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {
-      r4,  // key
-  };
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
-void NamedDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {
-      r4,  // name
-  };
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
-void CallHandlerDescriptor::InitializePlatformSpecific(
-    CallInterfaceDescriptorData* data) {
-  Register registers[] = {
-      r2,  // receiver
-  };
-  data->InitializePlatformSpecific(arraysize(registers), registers);
-}
-
 void ArgumentAdaptorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {