StubCallInterfaceDescriptor takes a context register.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 1dfd62f9f5ebe3852b69b0b308d0cd0086ecc959..701c8ba8f9b39aeb631c29e3de0ad642e46187e8 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -101,6 +101,9 @@ void TransitionElementsKindStub::InitializeInterfaceDescriptor(
 }
 
 
+const Register InterfaceDescriptor::ContextRegister() { return esi; }
+
+
 static void InitializeArrayConstructorDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor,
@@ -265,13 +268,11 @@ void CallDescriptors::InitializeForIsolate(Isolate* isolate) {
     CallInterfaceDescriptor* descriptor =
         isolate->call_descriptor(Isolate::ArgumentAdaptorCall);
     Register registers[] = { edi,  // JSFunction
-                             esi,  // context
                              eax,  // actual number of arguments
                              ebx,  // expected number of arguments
     };
     Representation representations[] = {
         Representation::Tagged(),     // JSFunction
-        Representation::Tagged(),     // context
         Representation::Integer32(),  // actual number of arguments
         Representation::Integer32(),  // expected number of arguments
     };
@@ -280,36 +281,27 @@ void CallDescriptors::InitializeForIsolate(Isolate* isolate) {
   {
     CallInterfaceDescriptor* descriptor =
         isolate->call_descriptor(Isolate::KeyedCall);
-    Register registers[] = { esi,  // context
-                             ecx,  // key
-    };
+    Register registers[] = { ecx };  // key
     Representation representations[] = {
-        Representation::Tagged(),     // context
-        Representation::Tagged(),     // key
+        Representation::Tagged()     // key
     };
     descriptor->Initialize(ARRAY_SIZE(registers), registers, representations);
   }
   {
     CallInterfaceDescriptor* descriptor =
         isolate->call_descriptor(Isolate::NamedCall);
-    Register registers[] = { esi,  // context
-                             ecx,  // name
-    };
+    Register registers[] = { ecx };  // name
     Representation representations[] = {
-        Representation::Tagged(),     // context
-        Representation::Tagged(),     // name
+        Representation::Tagged()     // name
     };
     descriptor->Initialize(ARRAY_SIZE(registers), registers, representations);
   }
   {
     CallInterfaceDescriptor* descriptor =
         isolate->call_descriptor(Isolate::CallHandler);
-    Register registers[] = { esi,  // context
-                             edx,  // receiver
-    };
+    Register registers[] = { edx };  // receiver
     Representation representations[] = {
-        Representation::Tagged(),  // context
-        Representation::Tagged(),  // receiver
+        Representation::Tagged()  // receiver
     };
     descriptor->Initialize(ARRAY_SIZE(registers), registers, representations);
   }
@@ -319,15 +311,13 @@ void CallDescriptors::InitializeForIsolate(Isolate* isolate) {
     Register registers[] = { eax,  // callee
                              ebx,  // call_data
                              ecx,  // holder
-                             edx,  // api_function_address
-                             esi,  // context
+                             edx   // api_function_address
     };
     Representation representations[] = {
         Representation::Tagged(),    // callee
         Representation::Tagged(),    // call_data
         Representation::Tagged(),    // holder
-        Representation::External(),  // api_function_address
-        Representation::Tagged(),    // context
+        Representation::External()   // api_function_address
     };
     descriptor->Initialize(ARRAY_SIZE(registers), registers, representations);
   }