--- old/src/hotspot/share/opto/compile.hpp	2020-01-17 17:08:42.944135282 +0100
+++ new/src/hotspot/share/opto/compile.hpp	2020-01-17 17:08:42.842135288 +0100
@@ -90,6 +90,16 @@
 class Node_Stack;
 struct Final_Reshape_Counts;
 
+enum LoopOptsMode {
+  LoopOptsDefault = 0,
+  LoopOptsNone = 1,
+  LoopOptsSkipSplitIf = 2,
+  LoopOptsShenandoahExpand = 3,
+  LoopOptsShenandoahPostExpand = 4,
+  LoopOptsVerify = 5,
+  LoopOptsZgcLastRound = 6
+};
+
 typedef unsigned int node_idx_t;
 class NodeCloneInfo {
  private:
@@ -1084,6 +1094,7 @@
   void inline_incrementally(PhaseIterGVN& igvn);
   void inline_string_calls(bool parse_time);
   void inline_boxing_calls(PhaseIterGVN& igvn);
+  bool optimize_loops(int& loop_opts_cnt, PhaseIterGVN& igvn, LoopOptsMode mode);
 
   // Matching, CFG layout, allocation, code generation
   PhaseCFG*         cfg()                       { return _cfg; }