[stubs] Optimize LoadGlobalViaContextStub and StoreGlobalViaContextStub.

src/interface-descriptors.cc

Index: src/interface-descriptors.cc
diff --git a/src/interface-descriptors.cc b/src/interface-descriptors.cc
index 20cd7802ddd76e5a273a0997d682d1ef357ad3a8..0526bf998655bb8c161209d51d6f10998c94e246 100644
--- a/src/interface-descriptors.cc
+++ b/src/interface-descriptors.cc
@@ -117,17 +117,16 @@ Type::FunctionType*
 LoadGlobalViaContextDescriptor::BuildCallInterfaceDescriptorFunctionType(
     Isolate* isolate, int paramater_count) {
   Type::FunctionType* function = Type::FunctionType::New(
-      AnyTagged(), Type::Undefined(), 3, isolate->interface_descriptor_zone());
-  function->InitParameter(0, SmiType());
-  function->InitParameter(1, SmiType());
-  function->InitParameter(2, AnyTagged());
+      AnyTagged(), Type::Undefined(), 2, isolate->interface_descriptor_zone());
+  function->InitParameter(0, UntaggedSigned32());
+  function->InitParameter(1, AnyTagged());
   return function;
 }
 
 
 void LoadGlobalViaContextDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {DepthRegister(), SlotRegister(), NameRegister()};
+  Register registers[] = {SlotRegister(), NameRegister()};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
@@ -136,19 +135,17 @@ Type::FunctionType*
 StoreGlobalViaContextDescriptor::BuildCallInterfaceDescriptorFunctionType(
     Isolate* isolate, int paramater_count) {
   Type::FunctionType* function = Type::FunctionType::New(
-      AnyTagged(), Type::Undefined(), 4, isolate->interface_descriptor_zone());
-  function->InitParameter(0, SmiType());
-  function->InitParameter(1, SmiType());
+      AnyTagged(), Type::Undefined(), 3, isolate->interface_descriptor_zone());
+  function->InitParameter(0, UntaggedSigned32());
+  function->InitParameter(1, AnyTagged());
   function->InitParameter(2, AnyTagged());
-  function->InitParameter(3, AnyTagged());
   return function;
 }
 
 
 void StoreGlobalViaContextDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {DepthRegister(), SlotRegister(), NameRegister(),
-                          ValueRegister()};
+  Register registers[] = {SlotRegister(), NameRegister(), ValueRegister()};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }