Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/compiler/dead-code-elimination.h b/src/compiler/dead-code-elimination.h
new file mode 100644
index 0000000..e5996c8
--- /dev/null
+++ b/src/compiler/dead-code-elimination.h
@@ -0,0 +1,52 @@
+// Copyright 2015 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.
+
+#ifndef V8_COMPILER_DEAD_CODE_ELIMINATION_H_
+#define V8_COMPILER_DEAD_CODE_ELIMINATION_H_
+
+#include "src/compiler/graph-reducer.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+// Forward declarations.
+class CommonOperatorBuilder;
+
+
+// Propagates {Dead} control through the graph and thereby removes dead code.
+// Note that this does not include trimming dead uses from the graph, and it
+// also does not include detecting dead code by any other means than seeing a
+// {Dead} control input; that is left to other reducers.
+class DeadCodeElimination final : public AdvancedReducer {
+ public:
+ DeadCodeElimination(Editor* editor, Graph* graph,
+ CommonOperatorBuilder* common);
+ ~DeadCodeElimination() final {}
+
+ Reduction Reduce(Node* node) final;
+
+ private:
+ Reduction ReduceEnd(Node* node);
+ Reduction ReduceLoopOrMerge(Node* node);
+ Reduction ReduceNode(Node* node);
+
+ void TrimMergeOrPhi(Node* node, int size);
+
+ Graph* graph() const { return graph_; }
+ CommonOperatorBuilder* common() const { return common_; }
+ Node* dead() const { return dead_; }
+
+ Graph* const graph_;
+ CommonOperatorBuilder* const common_;
+ Node* const dead_;
+
+ DISALLOW_COPY_AND_ASSIGN(DeadCodeElimination);
+};
+
+} // namespace compiler
+} // namespace internal
+} // namespace v8
+
+#endif // V8_COMPILER_DEAD_CODE_ELIMINATION_H_