Make concrete classes for individual call descriptors.

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index b28a505a7acac5bf37858e580e55e7a0ec0a02c2..0ecd36fe1927151b0208f291d0e6d365b2e8494f 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -31,14 +31,12 @@ static void InitializeArrayConstructorDescriptor(
       Runtime::kArrayConstructor)->entry;
 
   if (constant_stack_parameter_count == 0) {
-    CallInterfaceDescriptor* call_descriptor = isolate->call_descriptor(
-        CallDescriptorKey::ArrayConstructorConstantArgCountCall);
+    ArrayConstructorConstantArgCountDescriptor call_descriptor(isolate);
     descriptor->Initialize(major, call_descriptor, deopt_handler,
                            constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE);
   } else {
-    CallInterfaceDescriptor* call_descriptor =
-        isolate->call_descriptor(CallDescriptorKey::ArrayConstructorCall);
+    ArrayConstructorDescriptor call_descriptor(isolate);
     descriptor->Initialize(major, call_descriptor, x0, deopt_handler,
                            constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE, PASS_ARGUMENTS);
@@ -72,14 +70,12 @@ static void InitializeInternalArrayConstructorDescriptor(
       Runtime::kInternalArrayConstructor)->entry;
 
   if (constant_stack_parameter_count == 0) {
-    CallInterfaceDescriptor* call_descriptor = isolate->call_descriptor(
-        CallDescriptorKey::InternalArrayConstructorConstantArgCountCall);
+    InternalArrayConstructorConstantArgCountDescriptor call_descriptor(isolate);
     descriptor->Initialize(major, call_descriptor, deopt_handler,
                            constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE);
   } else {
-    CallInterfaceDescriptor* call_descriptor = isolate->call_descriptor(
-        CallDescriptorKey::InternalArrayConstructorCall);
+    InternalArrayConstructorDescriptor call_descriptor(isolate);
     descriptor->Initialize(major, call_descriptor, x0, deopt_handler,
                            constant_stack_parameter_count,
                            JS_FUNCTION_STUB_MODE, PASS_ARGUMENTS);
@@ -1431,7 +1427,7 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
 
 void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
   Label miss;
-  Register receiver = LoadConvention::ReceiverRegister();
+  Register receiver = LoadDescriptor::ReceiverRegister();
 
   NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, x10,
                                                           x11, &miss);
@@ -4305,14 +4301,14 @@ void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
 
 
 void LoadICTrampolineStub::Generate(MacroAssembler* masm) {
-  EmitLoadTypeFeedbackVector(masm, FullVectorLoadConvention::VectorRegister());
+  EmitLoadTypeFeedbackVector(masm, VectorLoadICDescriptor::VectorRegister());
   VectorLoadStub stub(isolate(), state());
   __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
 }
 
 
 void KeyedLoadICTrampolineStub::Generate(MacroAssembler* masm) {
-  EmitLoadTypeFeedbackVector(masm, FullVectorLoadConvention::VectorRegister());
+  EmitLoadTypeFeedbackVector(masm, VectorLoadICDescriptor::VectorRegister());
   VectorKeyedLoadStub stub(isolate());
   __ Jump(stub.GetCode(), RelocInfo::CODE_TARGET);
 }