[turbofan] Deferred blocks splintering.

src/compiler/live-range-separator.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_LIVE_RANGE_SEPARATOR_H_
+#define V8_LIVE_RANGE_SEPARATOR_H_
+
+
+#include <src/zone.h>
+namespace v8 {
+namespace internal {
+
+class Zone;
+
+namespace compiler {
+
+class RegisterAllocationData;
+
+
+// A register allocation pair of transformations: splinter and merge live ranges
+class LiveRangeSeparator final : public ZoneObject {
+ public:
+  LiveRangeSeparator(RegisterAllocationData* data, Zone* zone)
+      : data_(data), zone_(zone) {}
+
+  void Splinter();
+
+ private:
+  RegisterAllocationData* data() const { return data_; }
+  Zone* zone() const { return zone_; }
+
+  RegisterAllocationData* const data_;
+  Zone* const zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(LiveRangeSeparator);
+};
+
+
+class LiveRangeMerger final : public ZoneObject {
+ public:
+  LiveRangeMerger(RegisterAllocationData* data, Zone* zone)
+      : data_(data), zone_(zone) {}
+
+  void Merge();
+
+ private:
+  RegisterAllocationData* data() const { return data_; }
+  Zone* zone() const { return zone_; }
+
+  RegisterAllocationData* const data_;
+  Zone* const zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(LiveRangeMerger);
+};
+
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+#endif  // V8_LIVE_RANGE_SEPARATOR_H_