[ignition] Only initialize [[HomeObject]] for class constructors if needed

src/ast/ast.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/ast/ast.h"
 
 #include <cmath>  // For isfinite.
 
 #include "src/ast/compile-time-value.h"
 #include "src/ast/prettyprinter.h"
@@ skipping 349 matching lines @@
                                            Kind kind, bool is_static,
                                            bool is_computed_name)
     : LiteralProperty(key, value, is_computed_name),
       kind_(kind),
       is_static_(is_static) {}
 
 void ClassLiteral::AssignFeedbackVectorSlots(Isolate* isolate,
                                              FeedbackVectorSpec* spec,
                                              FeedbackVectorSlotCache* cache) {
   // This logic that computes the number of slots needed for vector store
-  // ICs must mirror FullCodeGenerator::VisitClassLiteral.
-  prototype_slot_ = spec->AddLoadICSlot();
+  // ICs must mirror BytecodeGenerator::VisitClassLiteral.
+  if (FunctionLiteral::NeedsHomeObject(constructor())) {
+    home_object_slot_ = spec->AddStoreICSlot();
+  }
+
   if (NeedsProxySlot()) {
     proxy_slot_ = spec->AddStoreICSlot();
   }
 
   for (int i = 0; i < properties()->length(); i++) {
     ClassLiteral::Property* property = properties()->at(i);
     Expression* value = property->value();
     if (FunctionLiteral::NeedsHomeObject(value)) {
       property->SetSlot(spec->AddStoreICSlot());
     }
@@ skipping 579 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && x->AsString() == y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 }  // namespace internal
 }  // namespace v8