Revert of [regexp] Remove remainder of native RegExpExecStub

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index 619af3f7b9b128a0c9c456a7b1117677a2b8daf0..a5dccc3583548c3efc25e426e3fee8ff6b9e75ed 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -492,6 +492,24 @@
                                       machine_types);
 }
 
+void RegExpExecDescriptor::InitializePlatformIndependent(
+    CallInterfaceDescriptorData* data) {
+  // kString, kLastIndex, kStringStart, kStringEnd, kEntryPoint
+  MachineType machine_types[] = {MachineType::AnyTagged(), MachineType::Int32(),
+                                 MachineType::Pointer(), MachineType::Pointer(),
+                                 MachineType::AnyTagged()};
+  data->InitializePlatformIndependent(arraysize(machine_types), 0,
+                                      machine_types);
+}
+
+void RegExpExecDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {StringRegister(), LastIndexRegister(),
+                          StringStartRegister(), StringEndRegister(),
+                          CodeRegister()};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 void BuiltinDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kTarget, kNewTarget, kArgumentsCount