1 files changed, 85 insertions, 0 deletions
diff --git a/deps/v8/src/compiler/js-heap-copy-reducer.cc b/deps/v8/src/compiler/js-heap-copy-reducer.cc
new file mode 100644
index 0000000000..0bcc662771
--- /dev/null
+++ b/deps/v8/src/compiler/js-heap-copy-reducer.cc
@@ -0,0 +1,85 @@
+// Copyright 2018 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/js-heap-copy-reducer.h"
+
+#include "src/compiler/common-operator.h"
+#include "src/compiler/js-heap-broker.h"
+#include "src/compiler/js-operator.h"
+#include "src/heap/factory-inl.h"
+#include "src/objects/map.h"
+#include "src/objects/scope-info.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+// In the functions below, we call the ObjectRef (or subclass) constructor in
+// order to trigger serialization if not yet done.
+
+JSHeapCopyReducer::JSHeapCopyReducer(JSHeapBroker* broker) : broker_(broker) {}
+
+JSHeapBroker* JSHeapCopyReducer::broker() { return broker_; }
+
+Reduction JSHeapCopyReducer::Reduce(Node* node) {
+  switch (node->opcode()) {
+    case IrOpcode::kHeapConstant: {
+      ObjectRef(broker(), HeapConstantOf(node->op()));
+      break;
+    }
+    case IrOpcode::kJSCreateArray: {
+      CreateArrayParameters const& p = CreateArrayParametersOf(node->op());
+      Handle<AllocationSite> site;
+      if (p.site().ToHandle(&site)) AllocationSiteRef(broker(), site);
+      break;
+    }
+    case IrOpcode::kJSCreateCatchContext: {
+      ScopeInfoRef(broker(), ScopeInfoOf(node->op()));
+      break;
+    }
+    case IrOpcode::kJSCreateClosure: {
+      CreateClosureParameters const& p = CreateClosureParametersOf(node->op());
+      SharedFunctionInfoRef(broker(), p.shared_info());
+      HeapObjectRef(broker(), p.feedback_cell());
+      HeapObjectRef(broker(), p.code());
+      break;
+    }
+    case IrOpcode::kJSCreateEmptyLiteralArray: {
+      // TODO(neis, jarin) Force serialization of the entire feedback vector
+      // rather than just the one element.
+      FeedbackParameter const& p = FeedbackParameterOf(node->op());
+      FeedbackVectorRef(broker(), p.feedback().vector());
+      Handle<Object> feedback(
+          p.feedback().vector()->Get(p.feedback().slot())->ToObject(),
+          broker()->isolate());
+      ObjectRef(broker(), feedback);
+      break;
+    }
+    case IrOpcode::kJSCreateFunctionContext: {
+      CreateFunctionContextParameters const& p =
+          CreateFunctionContextParametersOf(node->op());
+      ScopeInfoRef(broker(), p.scope_info());
+      break;
+    }
+    case IrOpcode::kJSCreateLiteralArray:
+    case IrOpcode::kJSCreateLiteralObject: {
+      CreateLiteralParameters const& p = CreateLiteralParametersOf(node->op());
+      ObjectRef(broker(), p.feedback().vector());
+      break;
+    }
+    case IrOpcode::kJSLoadNamed:
+    case IrOpcode::kJSStoreNamed: {
+      NamedAccess const& p = NamedAccessOf(node->op());
+      NameRef(broker(), p.name());
+      break;
+    }
+    default:
+      break;
+  }
+  return NoChange();
+}
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8