[builtins] Introduce DeleteProperty builtin

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 2102 matching lines @@
     Variable* variable = expr->expression()->AsVariableProxy()->var();
     DCHECK(is_sloppy(language_mode()) || variable->is_this());
     value = BuildVariableDelete(variable, expr->id(),
                                 ast_context()->GetStateCombine());
   } else if (expr->expression()->IsProperty()) {
     Property* property = expr->expression()->AsProperty();
     VisitForValue(property->obj());
     VisitForValue(property->key());
     Node* key = environment()->Pop();
     Node* object = environment()->Pop();
-    value = NewNode(javascript()->DeleteProperty(language_mode()), object, key);
+    Node* mode = jsgraph()->Constant(static_cast<int32_t>(language_mode()));
+    value = NewNode(javascript()->DeleteProperty(), object, key, mode);
     PrepareFrameState(value, expr->id(), ast_context()->GetStateCombine());
   } else {
     VisitForEffect(expr->expression());
     value = jsgraph()->TrueConstant();
   }
   ast_context()->ProduceValue(expr, value);
 }
 
 
 void AstGraphBuilder::VisitVoid(UnaryOperation* expr) {
@@ skipping 312 matching lines @@
 
 
 Node* AstGraphBuilder::BuildVariableDelete(Variable* variable,
                                            BailoutId bailout_id,
                                            OutputFrameStateCombine combine) {
   switch (variable->location()) {
     case VariableLocation::UNALLOCATED: {
       // Global var, const, or let variable.
       Node* global = BuildLoadGlobalObject();
       Node* name = jsgraph()->Constant(variable->name());
-      const Operator* op = javascript()->DeleteProperty(language_mode());
-      Node* result = NewNode(op, global, name);
+      Node* mode = jsgraph()->Constant(static_cast<int32_t>(language_mode()));
+      const Operator* op = javascript()->DeleteProperty();
+      Node* result = NewNode(op, global, name, mode);
       PrepareFrameState(result, bailout_id, combine);
       return result;
     }
     case VariableLocation::PARAMETER:
     case VariableLocation::LOCAL:
     case VariableLocation::CONTEXT: {
       // Local var, const, or let variable or context variable.
       return jsgraph()->BooleanConstant(variable->is_this());
     }
     case VariableLocation::LOOKUP:
@@ skipping 707 matching lines @@
     float invocation_frequency, LoopAssignmentAnalysis* loop_assignment,
     SourcePositionTable* source_positions, int inlining_id)
     : AstGraphBuilder(local_zone, info, jsgraph, invocation_frequency,
                       loop_assignment),
       source_positions_(source_positions),
       start_position_(info->shared_info()->start_position(), inlining_id) {}
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8