--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/opto/live.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_OPTO_LIVE_HPP
+#define SHARE_VM_OPTO_LIVE_HPP
+
+#include "libadt/vectset.hpp"
+#include "opto/block.hpp"
+#include "opto/indexSet.hpp"
+#include "opto/phase.hpp"
+#include "opto/regmask.hpp"
+
+class Block;
+class PhaseCFG;
+class VectorSet;
+class IndexSet;
+
+//------------------------------LRG_List---------------------------------------
+// Map Node indices to Live RanGe indices.
+// Array lookup in the optimized case.
+typedef GrowableArray<uint> LRG_List;
+
+//------------------------------PhaseLive--------------------------------------
+// Compute live-in/live-out
+class PhaseLive : public Phase {
+  // Array of Sets of values live at the start of a block.
+  // Indexed by block pre-order number.
+  IndexSet *_live; // live out
+  IndexSet *_livein; // live in
+
+  // Array of Sets of values defined locally in the block
+  // Indexed by block pre-order number.
+  IndexSet *_defs;
+
+  // Array of delta-set pointers, indexed by block pre-order number
+  IndexSet **_deltas;
+  IndexSet *_free_IndexSet;     // Free list of same
+
+  Block_List *_worklist;        // Worklist for iterative solution
+
+  const PhaseCFG &_cfg;         // Basic blocks
+  const LRG_List &_names;       // Mapping from Nodes to live ranges
+  uint _maxlrg;                 // Largest live-range number
+  Arena *_arena;
+  bool _keep_deltas;            // Retain live in information
+
+  IndexSet *getset( Block *p );
+  IndexSet *getfreeset( );
+  void freeset( Block *p );
+  void add_liveout( Block *p, uint r, VectorSet &first_pass );
+  void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass );
+  void add_livein( Block *p, IndexSet *lo );
+
+public:
+  PhaseLive(const PhaseCFG &cfg, const LRG_List &names, Arena *arena, bool keep_deltas);
+  ~PhaseLive() {}
+  // Compute liveness info
+  void compute(uint maxlrg);
+  // Reset arena storage
+  void reset() { _live = NULL; }
+
+  // Return the live-out set for this block
+  IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; }
+  IndexSet *livein( const Block * b ) { return &_livein[b->_pre_order - 1]; }
+
+#ifndef PRODUCT
+  void dump( const Block *b ) const;
+  void stats(uint iters) const;
+#endif
+};
+
+#endif // SHARE_VM_OPTO_LIVE_HPP