[fullcodegen] Remove deprecated support for class literals.

src/compiler/ast-graph-builder.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.
 
 #include "src/compiler/ast-graph-builder.h"
 
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/compilation-info.h"
 #include "src/compiler.h"
@@ skipping 1550 matching lines @@
       Compiler::GetSharedFunctionInfo(expr, info()->script(), info());
   CHECK(!shared_info.is_null());  // TODO(mstarzinger): Set stack overflow?
 
   // Create node to instantiate a new closure.
   PretenureFlag pretenure = expr->pretenure() ? TENURED : NOT_TENURED;
   const Operator* op = javascript()->CreateClosure(shared_info, pretenure);
   Node* value = NewNode(op);
   ast_context()->ProduceValue(expr, value);
 }
 
-
-void AstGraphBuilder::VisitClassLiteral(ClassLiteral* expr) {
-  VisitForValueOrTheHole(expr->extends());
-  VisitForValue(expr->constructor());
-
-  // Create node to instantiate a new class.
-  Node* constructor = environment()->Pop();
-  Node* extends = environment()->Pop();
-  Node* start = jsgraph()->Constant(expr->start_position());
-  Node* end = jsgraph()->Constant(expr->end_position());
-  const Operator* opc = javascript()->CallRuntime(Runtime::kDefineClass);
-  Node* literal = NewNode(opc, extends, constructor, start, end);
-  PrepareFrameState(literal, expr->CreateLiteralId(),
-                    OutputFrameStateCombine::Push());
-  environment()->Push(literal);
-
-  // Load the "prototype" from the constructor.
-  PrepareEagerCheckpoint(expr->CreateLiteralId());
-  Handle<Name> name = isolate()->factory()->prototype_string();
-  VectorSlotPair pair = CreateVectorSlotPair(expr->PrototypeSlot());
-  Node* prototype = BuildNamedLoad(literal, name, pair);
-  PrepareFrameState(prototype, expr->PrototypeId(),
-                    OutputFrameStateCombine::Push());
-  environment()->Push(prototype);
-
-  // Create nodes to store method values into the literal.
-  for (int i = 0; i < expr->properties()->length(); i++) {
-    ClassLiteral::Property* property = expr->properties()->at(i);
-    environment()->Push(environment()->Peek(property->is_static() ? 1 : 0));
-
-    VisitForValue(property->key());
-    Node* name = BuildToName(environment()->Pop(), expr->GetIdForProperty(i));
-    environment()->Push(name);
-
-    // The static prototype property is read only. We handle the non computed
-    // property name case in the parser. Since this is the only case where we
-    // need to check for an own read only property we special case this so we do
-    // not need to do this for every property.
-    if (property->is_static() && property->is_computed_name()) {
-      Node* check = BuildThrowIfStaticPrototype(environment()->Pop(),
-                                                expr->GetIdForProperty(i));
-      environment()->Push(check);
-    }
-
-    VisitForValue(property->value());
-    Node* value = environment()->Pop();
-    Node* key = environment()->Pop();
-    Node* receiver = environment()->Pop();
-
-    BuildSetHomeObject(value, receiver, property);
-
-    switch (property->kind()) {
-      case ClassLiteral::Property::METHOD: {
-        Node* attr = jsgraph()->Constant(DONT_ENUM);
-        Node* set_function_name =
-            jsgraph()->Constant(property->NeedsSetFunctionName());
-        const Operator* op =
-            javascript()->CallRuntime(Runtime::kDefineDataPropertyInLiteral);
-        Node* call = NewNode(op, receiver, key, value, attr, set_function_name);
-        PrepareFrameState(call, BailoutId::None());
-        break;
-      }
-      case ClassLiteral::Property::GETTER: {
-        Node* attr = jsgraph()->Constant(DONT_ENUM);
-        const Operator* op = javascript()->CallRuntime(
-            Runtime::kDefineGetterPropertyUnchecked, 4);
-        NewNode(op, receiver, key, value, attr);
-        break;
-      }
-      case ClassLiteral::Property::SETTER: {
-        Node* attr = jsgraph()->Constant(DONT_ENUM);
-        const Operator* op = javascript()->CallRuntime(
-            Runtime::kDefineSetterPropertyUnchecked, 4);
-        NewNode(op, receiver, key, value, attr);
-        break;
-      }
-      case ClassLiteral::Property::FIELD: {
-        UNREACHABLE();
-        break;
-      }
-    }
-  }
-
-  // Set the constructor to have fast properties.
-  prototype = environment()->Pop();
-  literal = environment()->Pop();
-  const Operator* op = javascript()->CallRuntime(Runtime::kToFastProperties);
-  literal = NewNode(op, literal);
-
-  // Assign to class variable.
-  if (expr->class_variable_proxy() != nullptr) {
-    Variable* var = expr->class_variable_proxy()->var();
-    VectorSlotPair feedback = CreateVectorSlotPair(
-        expr->NeedsProxySlot() ? expr->ProxySlot()
-                               : FeedbackVectorSlot::Invalid());
-    BuildVariableAssignment(var, literal, Token::INIT, feedback,
-                            BailoutId::None());
-  }
-  ast_context()->ProduceValue(expr, literal);
-}
-
+void AstGraphBuilder::VisitClassLiteral(ClassLiteral* expr) { UNREACHABLE(); }
 
 void AstGraphBuilder::VisitNativeFunctionLiteral(NativeFunctionLiteral* expr) {
   UNREACHABLE();
 }
 
 
 void AstGraphBuilder::VisitDoExpression(DoExpression* expr) {
   VisitBlock(expr->block());
   VisitVariableProxy(expr->result());
   ast_context()->ReplaceValue(expr);
@@ skipping 1531 matching lines @@
   hole_check.If(check);
   hole_check.Then();
   environment()->Push(for_hole);
   hole_check.Else();
   Node* error = BuildThrowReferenceError(variable, bailout_id);
   environment()->Push(error);
   hole_check.End();
   return environment()->Pop();
 }
 
-
-Node* AstGraphBuilder::BuildThrowIfStaticPrototype(Node* name,
-                                                   BailoutId bailout_id) {
-  IfBuilder prototype_check(this);
-  Node* prototype_string =
-      jsgraph()->Constant(isolate()->factory()->prototype_string());
-  Node* check = NewNode(javascript()->StrictEqual(CompareOperationHint::kAny),
-                        name, prototype_string);
-  prototype_check.If(check);
-  prototype_check.Then();
-  Node* error = BuildThrowStaticPrototypeError(bailout_id);
-  environment()->Push(error);
-  prototype_check.Else();
-  environment()->Push(name);
-  prototype_check.End();
-  return environment()->Pop();
-}
-
-
 Node* AstGraphBuilder::BuildVariableLoad(Variable* variable,
                                          BailoutId bailout_id,
                                          const VectorSlotPair& feedback,
                                          OutputFrameStateCombine combine,
                                          TypeofMode typeof_mode) {
   Node* the_hole = jsgraph()->TheHoleConstant();
   switch (variable->location()) {
     case VariableLocation::UNALLOCATED: {
       // Global var, const, or let variable.
       Handle<Name> name = variable->name();
@@ skipping 358 matching lines @@
 Node* AstGraphBuilder::BuildThrowConstAssignError(BailoutId bailout_id) {
   const Operator* op =
       javascript()->CallRuntime(Runtime::kThrowConstAssignError);
   Node* call = NewNode(op);
   PrepareFrameState(call, bailout_id);
   Node* control = NewNode(common()->Throw(), call);
   UpdateControlDependencyToLeaveFunction(control);
   return call;
 }
 
-
-Node* AstGraphBuilder::BuildThrowStaticPrototypeError(BailoutId bailout_id) {
-  const Operator* op =
-      javascript()->CallRuntime(Runtime::kThrowStaticPrototypeError);
-  Node* call = NewNode(op);
-  PrepareFrameState(call, bailout_id);
-  Node* control = NewNode(common()->Throw(), call);
-  UpdateControlDependencyToLeaveFunction(control);
-  return call;
-}
-
-
 Node* AstGraphBuilder::BuildThrowUnsupportedSuperError(BailoutId bailout_id) {
   const Operator* op =
       javascript()->CallRuntime(Runtime::kThrowUnsupportedSuperError);
   Node* call = NewNode(op);
   PrepareFrameState(call, bailout_id);
   Node* control = NewNode(common()->Throw(), call);
   UpdateControlDependencyToLeaveFunction(control);
   return call;
 }
 
@@ skipping 490 matching lines @@
     TypeHintAnalysis* type_hint_analysis, SourcePositionTable* source_positions,
     int inlining_id)
     : AstGraphBuilder(local_zone, info, jsgraph, invocation_frequency,
                       loop_assignment, type_hint_analysis),
       source_positions_(source_positions),
       start_position_(info->shared_info()->start_position(), inlining_id) {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8