[fullcodegen] Remove deprecated support for class literals.

src/full-codegen/full-codegen.cc

 // Copyright 2012 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.
 
 #include "src/full-codegen/full-codegen.h"
 
 #include "src/ast/ast-numbering.h"
 #include "src/ast/ast.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopes.h"
@@ skipping 1533 matching lines @@
       Compiler::GetSharedFunctionInfo(expr, script(), info_);
   if (function_info.is_null()) {
     SetStackOverflow();
     return;
   }
   EmitNewClosure(function_info, expr->pretenure());
 }
 
 
 void FullCodeGenerator::VisitClassLiteral(ClassLiteral* lit) {
-  Comment cmnt(masm_, "[ ClassLiteral");
-
-  if (lit->extends() != NULL) {
-    VisitForStackValue(lit->extends());
-  } else {
-    PushOperand(isolate()->factory()->the_hole_value());
-  }
-
-  VisitForStackValue(lit->constructor());
-
-  PushOperand(Smi::FromInt(lit->start_position()));
-  PushOperand(Smi::FromInt(lit->end_position()));
-
-  CallRuntimeWithOperands(Runtime::kDefineClass);
-  PrepareForBailoutForId(lit->CreateLiteralId(), BailoutState::TOS_REGISTER);
-  PushOperand(result_register());
-
-  // Load the "prototype" from the constructor.
-  __ Move(LoadDescriptor::ReceiverRegister(), result_register());
-  CallLoadIC(lit->PrototypeSlot(), isolate()->factory()->prototype_string());
-  PrepareForBailoutForId(lit->PrototypeId(), BailoutState::TOS_REGISTER);
-  PushOperand(result_register());
-
-  EmitClassDefineProperties(lit);
-  DropOperands(1);
-
-  // Set the constructor to have fast properties.
-  CallRuntimeWithOperands(Runtime::kToFastProperties);
-
-  if (lit->class_variable_proxy() != nullptr) {
-    EmitVariableAssignment(lit->class_variable_proxy()->var(), Token::INIT,
-                           lit->ProxySlot(), HoleCheckMode::kElided);
-  }
-
-  context()->Plug(result_register());
+  // Unsupported
+  UNREACHABLE();
 }
 
 void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
   Comment cmnt(masm_, "[ RegExpLiteral");
   Callable callable = CodeFactory::FastCloneRegExp(isolate());
   CallInterfaceDescriptor descriptor = callable.descriptor();
   LoadFromFrameField(JavaScriptFrameConstants::kFunctionOffset,
                      descriptor.GetRegisterParameter(0));
   __ Move(descriptor.GetRegisterParameter(1),
           Smi::FromInt(expr->literal_index()));
@@ skipping 390 matching lines @@
   return info_->has_simple_parameters();
 }
 
 FunctionLiteral* FullCodeGenerator::literal() const { return info_->literal(); }
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8