diff -r 2d18e5ed0f8d -r 8b26bd8b1832 src/hotspot/share/code/compiledMethod.cpp
--- a/src/hotspot/share/code/compiledMethod.cpp	Thu Nov 22 09:44:02 2018 +0100
+++ b/src/hotspot/share/code/compiledMethod.cpp	Thu Nov 22 09:46:24 2018 +0100
@@ -44,11 +44,9 @@
                                bool caller_must_gc_arguments)
   : CodeBlob(name, type, layout, frame_complete_offset, frame_size, oop_maps, caller_must_gc_arguments),
     _mark_for_deoptimization_status(not_marked),
-    _is_unloading_state(0),
     _method(method)
 {
   init_defaults();
-  clear_unloading_state();
 }
 
 CompiledMethod::CompiledMethod(Method* method, const char* name, CompilerType type, int size,
@@ -57,11 +55,9 @@
   : CodeBlob(name, type, CodeBlobLayout((address) this, size, header_size, cb), cb,
              frame_complete_offset, frame_size, oop_maps, caller_must_gc_arguments),
     _mark_for_deoptimization_status(not_marked),
-    _is_unloading_state(0),
     _method(method)
 {
   init_defaults();
-  clear_unloading_state();
 }
 
 void CompiledMethod::init_defaults() {
@@ -546,74 +542,6 @@
   DEBUG_ONLY(metadata_do(check_class));
 }
 
-// The _is_unloading_state encodes a tuple comprising the unloading cycle
-// and the result of IsUnloadingBehaviour::is_unloading() fpr that cycle.
-// This is the bit layout of the _is_unloading_state byte: 00000CCU
-// CC refers to the cycle, which has 2 bits, and U refers to the result of
-// IsUnloadingBehaviour::is_unloading() for that unloading cycle.
-
-class IsUnloadingState: public AllStatic {
-  static const uint8_t _is_unloading_mask = 1;
-  static const uint8_t _is_unloading_shift = 0;
-  static const uint8_t _unloading_cycle_mask = 6;
-  static const uint8_t _unloading_cycle_shift = 1;
-
-  static uint8_t set_is_unloading(uint8_t state, bool value) {
-    state &= ~_is_unloading_mask;
-    if (value) {
-      state |= 1 << _is_unloading_shift;
-    }
-    assert(is_unloading(state) == value, "unexpected unloading cycle overflow");
-    return state;
-  }
-
-  static uint8_t set_unloading_cycle(uint8_t state, uint8_t value) {
-    state &= ~_unloading_cycle_mask;
-    state |= value << _unloading_cycle_shift;
-    assert(unloading_cycle(state) == value, "unexpected unloading cycle overflow");
-    return state;
-  }
-
-public:
-  static bool is_unloading(uint8_t state) { return (state & _is_unloading_mask) >> _is_unloading_shift == 1; }
-  static uint8_t unloading_cycle(uint8_t state) { return (state & _unloading_cycle_mask) >> _unloading_cycle_shift; }
-
-  static uint8_t create(bool is_unloading, uint8_t unloading_cycle) {
-    uint8_t state = 0;
-    state = set_is_unloading(state, is_unloading);
-    state = set_unloading_cycle(state, unloading_cycle);
-    return state;
-  }
-};
-
-bool CompiledMethod::is_unloading() {
-  uint8_t state = RawAccess<MO_RELAXED>::load(&_is_unloading_state);
-  bool state_is_unloading = IsUnloadingState::is_unloading(state);
-  uint8_t state_unloading_cycle = IsUnloadingState::unloading_cycle(state);
-  if (state_is_unloading) {
-    return true;
-  }
-  if (state_unloading_cycle == CodeCache::unloading_cycle()) {
-    return false;
-  }
-
-  // The IsUnloadingBehaviour is responsible for checking if there are any dead
-  // oops in the CompiledMethod, by calling oops_do on it.
-  state_unloading_cycle = CodeCache::unloading_cycle();
-  state_is_unloading = IsUnloadingBehaviour::current()->is_unloading(this);
-
-  state = IsUnloadingState::create(state_is_unloading, state_unloading_cycle);
-
-  RawAccess<MO_RELAXED>::store(&_is_unloading_state, state);
-
-  return state_is_unloading;
-}
-
-void CompiledMethod::clear_unloading_state() {
-  uint8_t state = IsUnloadingState::create(false, CodeCache::unloading_cycle());
-  RawAccess<MO_RELAXED>::store(&_is_unloading_state, state);
-}
-
 // Called to clean up after class unloading for live nmethods and from the sweeper
 // for all methods.
 void CompiledMethod::cleanup_inline_caches_impl(bool unloading_occurred, bool clean_all) {