[turbofan] Initial support for escape analysis.

src/compiler/escape-analysis-reducer.h

+// 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_ESCAPE_ANALYSIS_REDUCER_H_
+#define V8_COMPILER_ESCAPE_ANALYSIS_REDUCER_H_
+
+#include "src/compiler/escape-analysis.h"
+#include "src/compiler/graph-reducer.h"
+#include "src/compiler/js-graph.h"

[Michael Starzinger, 2015/12/01 17:18:37]

nit: It looks like the "js-graph.h" include is not necessary. Either way is fine
with me, but only forward declaring "JSGraph" or including the header should do
it.

[sigurds, 2015/12/02 10:12:20]

Done.

+
+namespace v8 {
+namespace internal {
+
+namespace compiler {
+
+// Forward declarations.
+class JSGraph;
+
+
+class EscapeAnalysisReducer final : public AdvancedReducer {
+ public:
+  EscapeAnalysisReducer(Editor* editor, JSGraph* jsgraph,
+                        EscapeStatusAnalysis* escape_status,
+                        EscapeObjectAnalysis* escape_analysis, Zone* zone);
+
+  Reduction Reduce(Node* node) final;
+
+ private:
+  Reduction ReduceLoadField(Node* node);
+  Reduction ReduceStoreField(Node* node);
+  Reduction ReduceAllocate(Node* node);
+  Reduction ReduceFinishRegion(Node* node);
+  Reduction ReduceReferenceEqual(Node* node);
+
+  Reduction ReplaceWithDeoptDummy(Node* node);
+
+  JSGraph* jsgraph() const { return jsgraph_; }
+  EscapeObjectAnalysis* escape_analysis() const { return escape_analysis_; }
+  EscapeStatusAnalysis* escape_status() const { return escape_status_; }
+  Zone* zone() const { return zone_; }
+
+  JSGraph* const jsgraph_;
+  EscapeStatusAnalysis* escape_status_;
+  EscapeObjectAnalysis* escape_analysis_;
+  Zone* const zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(EscapeAnalysisReducer);
+};
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_COMPILER_ESCAPE_ANALYSIS_REDUCER_H_