[stubs] Port LoadFunctionPrototypeStub to CSA

src/ic/s390/handler-compiler-s390.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/ic/handler-compiler.h"
 
 #include "src/api-arguments.h"
 #include "src/field-type.h"
@@ skipping 151 matching lines @@
 
   // Restore the temporarily used register.
   __ LoadP(properties, FieldMemOperand(receiver, JSObject::kPropertiesOffset));
 
   NameDictionaryLookupStub::GenerateNegativeLookup(
       masm, miss_label, &done, receiver, properties, name, scratch1);
   __ bind(&done);
   __ DecrementCounter(counters->negative_lookups_miss(), 1, scratch0, scratch1);
 }
 
-void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(
-    MacroAssembler* masm, Register receiver, Register scratch1,
-    Register scratch2, Label* miss_label) {
-  __ TryGetFunctionPrototype(receiver, scratch1, scratch2, miss_label);
-  __ LoadRR(r2, scratch1);
-  __ Ret();
-}
-
 // Generate code to check that a global property cell is empty. Create
 // the property cell at compilation time if no cell exists for the
 // property.
 void PropertyHandlerCompiler::GenerateCheckPropertyCell(
     MacroAssembler* masm, Handle<JSGlobalObject> global, Handle<Name> name,
     Register scratch, Label* miss) {
   Handle<PropertyCell> cell = JSGlobalObject::EnsureEmptyPropertyCell(
       global, name, PropertyCellType::kInvalidated);
   Isolate* isolate = masm->isolate();
   DCHECK(cell->value()->IsTheHole(isolate));
@@ skipping 394 matching lines @@
 
   // Return the generated code.
   return GetCode(kind(), name);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM