Turn stack check elimination into proper HPhase.

src/hydrogen-sce.h

Index: src/hydrogen-sce.h
diff --git a/test/cctest/gay-shortest.h b/src/hydrogen-sce.h
similarity index 81%
copy from test/cctest/gay-shortest.h
copy to src/hydrogen-sce.h
index 9b512148e6e0885988190476ef97353e4a7bf769..55e153e0ed5ee3481669ee5c991f81238d51176e 100644
--- a/test/cctest/gay-shortest.h
+++ b/src/hydrogen-sce.h
@@ -1,4 +1,4 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
+// Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
@@ -25,20 +25,24 @@
 // (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 GAY_SHORTEST_H_
-#define GAY_SHORTEST_H_
+#ifndef V8_HYDROGEN_SCE_H_
+#define V8_HYDROGEN_SCE_H_
+
+#include "hydrogen.h"
 
 namespace v8 {
 namespace internal {
 
-struct PrecomputedShortest {
-  double v;
-  const char* representation;
-  int decimal_point;
+
+class HStackCheckEliminationPhase : public HPhase {
+ public:
+  explicit HStackCheckEliminationPhase(HGraph* graph)
+      : HPhase("H_Stack check elimination", graph) { }
+
+  void Run();
 };
 
-Vector<const PrecomputedShortest> PrecomputedShortestRepresentations();
 
 } }  // namespace v8::internal
 
-#endif  // GAY_SHORTEST_H_
+#endif  // V8_HYDROGEN_SCE_H_