A64: Synchronize with r15545.

src/hydrogen-bce.h

 // Copyright 2013 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
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 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
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 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_MARKING_THREAD_H_
-#define V8_MARKING_THREAD_H_
+#ifndef V8_HYDROGEN_BCE_H_
+#define V8_HYDROGEN_BCE_H_
 
-#include "atomicops.h"
-#include "flags.h"
-#include "platform.h"
-#include "v8utils.h"
-
-#include "spaces.h"
-
-#include "heap.h"
+#include "hydrogen.h"
 
 namespace v8 {
 namespace internal {
 
-class MarkingThread : public Thread {
+
+class BoundsCheckBbData;
+class BoundsCheckKey;
+class BoundsCheckTable : private ZoneHashMap {
  public:
-  explicit MarkingThread(Isolate* isolate);
+  explicit BoundsCheckTable(Zone* zone);
 
-  void Run();
-  void Stop();
-  void StartMarking();
-  void WaitForMarkingThread();
+  INLINE(BoundsCheckBbData** LookupOrInsert(BoundsCheckKey* key, Zone* zone));
+  INLINE(void Insert(BoundsCheckKey* key, BoundsCheckBbData* data, Zone* zone));
+  INLINE(void Delete(BoundsCheckKey* key));
 
-  ~MarkingThread() {
-    delete start_marking_semaphore_;
-    delete end_marking_semaphore_;
-    delete stop_semaphore_;
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BoundsCheckTable);
+};
+
+
+class HBoundsCheckEliminationPhase : public HPhase {
+ public:
+  explicit HBoundsCheckEliminationPhase(HGraph* graph)
+      : HPhase("H_Bounds checks elimination", graph), table_(zone()) { }
+
+  void Run() {
+    EliminateRedundantBoundsChecks(graph()->entry_block());
   }
 
  private:
-  Isolate* isolate_;
-  Heap* heap_;
-  Semaphore* start_marking_semaphore_;
-  Semaphore* end_marking_semaphore_;
-  Semaphore* stop_semaphore_;
-  volatile AtomicWord stop_thread_;
-  int id_;
-  static Atomic32 id_counter_;
+  void EliminateRedundantBoundsChecks(HBasicBlock* bb);
+
+  BoundsCheckTable table_;
+
+  DISALLOW_COPY_AND_ASSIGN(HBoundsCheckEliminationPhase);
 };
 
+
 } }  // namespace v8::internal
 
-#endif  // V8_MARKING_THREAD_H_
+#endif  // V8_HYDROGEN_BCE_H_