A64: Synchronize with r15545.

src/hydrogen-uint32-analysis.h

Index: src/hydrogen-uint32-analysis.h
diff --git a/src/marking-thread.h b/src/hydrogen-uint32-analysis.h
similarity index 70%
copy from src/marking-thread.h
copy to src/hydrogen-uint32-analysis.h
index 9efa3af13262165972abf179defac6f83fed4ac9..59739d1ccf13ffc428996432417019a8a84c2829 100644
--- a/src/marking-thread.h
+++ b/src/hydrogen-uint32-analysis.h
@@ -25,47 +25,35 @@
 // (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_UINT32_ANALYSIS_H_
+#define V8_HYDROGEN_UINT32_ANALYSIS_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 {
+
+// Discover instructions that can be marked with kUint32 flag allowing
+// them to produce full range uint32 values.
+class HUint32AnalysisPhase : public HPhase {
  public:
-  explicit MarkingThread(Isolate* isolate);
+  explicit HUint32AnalysisPhase(HGraph* graph)
+      : HPhase("H_Compute safe UInt32 operations", graph), phis_(4, zone()) { }
 
   void Run();
-  void Stop();
-  void StartMarking();
-  void WaitForMarkingThread();
-
-  ~MarkingThread() {
-    delete start_marking_semaphore_;
-    delete end_marking_semaphore_;
-    delete stop_semaphore_;
-  }
 
  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_;
+  INLINE(bool IsSafeUint32Use(HValue* val, HValue* use));
+  INLINE(bool Uint32UsesAreSafe(HValue* uint32val));
+  INLINE(bool CheckPhiOperands(HPhi* phi));
+  INLINE(void UnmarkPhi(HPhi* phi, ZoneList<HPhi*>* worklist));
+  INLINE(void UnmarkUnsafePhis());
+
+  ZoneList<HPhi*> phis_;
 };
 
+
 } }  // namespace v8::internal
 
-#endif  // V8_MARKING_THREAD_H_
+#endif  // V8_HYDROGEN_UINT32_ANALYSIS_H_