[interpreter] Fix the interface descriptor for interpreter dispatch.

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index 2a59e1d5eb0f9064e428930c05550649f5976ff0..509115c260c52e9667660c6e5b71b30e5e810525 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -417,9 +417,9 @@ void ApiCallbackDescriptor::InitializePlatformIndependent(
 void InterpreterDispatchDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kAccumulator, kBytecodeOffset, kBytecodeArray, kDispatchTable
-  MachineType machine_types[] = {MachineType::AnyTagged(), MachineType::Int32(),
-                                 MachineType::AnyTagged(),
-                                 MachineType::AnyTagged()};
+  MachineType machine_types[] = {
+      MachineType::AnyTagged(), MachineType::Pointer(),

[rmcilroy, 2016/09/27 14:01:27]

Should it not be IntPtr() ?  It isn't really a pointer, it is just an offset
which is added to a tagged pointer.

[epertoso, 2016/09/27 14:03:58]

Oops. Done.

+      MachineType::AnyTagged(), MachineType::AnyTagged()};
   data->InitializePlatformIndependent(arraysize(machine_types), 0,
                                       machine_types);
 }