[turbofan] Deferred blocks splintering.

src/compiler/preprocess-live-ranges.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_PREPROCESS_LIVE_RANGES_H_
-#define V8_PREPROCESS_LIVE_RANGES_H_
-
-#include "src/compiler/register-allocator.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-
-class PreprocessLiveRanges final {
- public:
-  PreprocessLiveRanges(RegisterAllocationData* data, Zone* zone)
-      : data_(data), zone_(zone) {}
-  void PreprocessRanges();
-
- private:
-  void SplitRangesAroundDeferredBlocks();
-
-  RegisterAllocationData* data() { return data_; }
-  Zone* zone() { return zone_; }
-
-  RegisterAllocationData* data_;
-  Zone* zone_;
-};
-
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8
-#endif  // V8_PREPROCESS_LIVE_RANGES_H_