[compiler] Remove the special case "prototype" load in 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.h"
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopeinfo.h"
@@ skipping 1348 matching lines @@
       __ Push(isolate()->factory()->the_hole_value());
     }
 
     VisitForStackValue(lit->constructor());
 
     __ Push(Smi::FromInt(lit->start_position()));
     __ Push(Smi::FromInt(lit->end_position()));
 
     __ CallRuntime(Runtime::kDefineClass);
     PrepareForBailoutForId(lit->CreateLiteralId(), TOS_REG);
+    __ Push(result_register());
+
+    // Load the "prototype" from the constructor.
+    __ Move(LoadDescriptor::ReceiverRegister(), result_register());
+    __ LoadRoot(LoadDescriptor::NameRegister(),
+                Heap::kprototype_stringRootIndex);
+    __ Move(LoadDescriptor::SlotRegister(), SmiFromSlot(lit->PrototypeSlot()));
+    CallLoadIC(NOT_INSIDE_TYPEOF);
+    PrepareForBailoutForId(lit->PrototypeId(), TOS_REG);
+    __ Push(result_register());
 
     EmitClassDefineProperties(lit);
 
+    // Set both the prototype and constructor to have fast properties, and also
+    // freeze them in strong mode.
+    __ CallRuntime(Runtime::kFinalizeClassDefinition);
+
     if (lit->class_variable_proxy() != nullptr) {
       EmitVariableAssignment(lit->class_variable_proxy()->var(), Token::INIT,
                              lit->ProxySlot());
     }
   }
 
   context()->Plug(result_register());
 }
 
 
@@ skipping 398 matching lines @@
   return var->mode() == CONST_LEGACY || var->scope()->is_nonlinear() ||
          var->initializer_position() >= proxy->position();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8