[stubs] Port LoadFunctionPrototypeStub to CSA

src/ic/x64/handler-compiler-x64.cc

 // Copyright 2014 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_X64
 
 #include "src/ic/handler-compiler.h"
 
 #include "src/api-arguments.h"
 #include "src/field-type.h"
@@ skipping 65 matching lines @@
                  Heap::kHashTableMapRootIndex);
   __ j(not_equal, miss_label);
 
   Label done;
   NameDictionaryLookupStub::GenerateNegativeLookup(masm, miss_label, &done,
                                                    properties, name, scratch1);
   __ bind(&done);
   __ DecrementCounter(counters->negative_lookups_miss(), 1);
 }
 
-void NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(
-    MacroAssembler* masm, Register receiver, Register result, Register scratch,
-    Label* miss_label) {
-  __ TryGetFunctionPrototype(receiver, result, miss_label);
-  if (!result.is(rax)) __ movp(rax, result);
-  __ ret(0);
-}
-
 static void CompileCallLoadPropertyWithInterceptor(
     MacroAssembler* masm, Register receiver, Register holder, Register name,
     Handle<JSObject> holder_obj, Runtime::FunctionId id) {
   DCHECK(NamedLoadHandlerCompiler::kInterceptorArgsLength ==
          Runtime::FunctionForId(id)->nargs);
 
   STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsNameIndex == 0);
   STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsThisIndex == 1);
   STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsHolderIndex == 2);
   STATIC_ASSERT(NamedLoadHandlerCompiler::kInterceptorArgsLength == 3);
@@ skipping 511 matching lines @@
   // Return the generated code.
   return GetCode(kind(), name);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64