8290459: Remove unused GCCause enums

Reviewed-by: tschatzl, kbarrett

src/hotspot/share/gc/shared/gcCause.cpp

@@ -72,9 +72,6 @@ const char* GCCause::to_string(GCCause::Cause cause) {
     case _allocation_failure:
       return "Allocation Failure";
 
-    case _tenured_generation_full:
-      return "Tenured Generation Full";
-
     case _codecache_GC_threshold:
       return "CodeCache GC Threshold";
 
@@ -84,12 +81,6 @@ const char* GCCause::to_string(GCCause::Cause cause) {
     case _metadata_GC_clear_soft_refs:
       return "Metadata GC Clear Soft References";
 
-    case _old_generation_expanded_on_last_scavenge:
-      return "Old Generation Expanded On Last Scavenge";
-
-    case _old_generation_too_full_to_scavenge:
-      return "Old Generation Too Full To Scavenge";
-
     case _adaptive_size_policy:
       return "Ergonomics";
 

src/hotspot/share/gc/shared/gcCause.hpp

@@ -63,13 +63,10 @@ class GCCause : public AllStatic {
 
     /* implementation specific */
 
-    _tenured_generation_full,
     _codecache_GC_threshold,
     _metadata_GC_threshold,
     _metadata_GC_clear_soft_refs,
 
-    _old_generation_expanded_on_last_scavenge,
-    _old_generation_too_full_to_scavenge,
     _adaptive_size_policy,
 
     _g1_inc_collection_pause,
@@ -109,17 +106,11 @@ class GCCause : public AllStatic {
 
   // Causes for collection of the tenured gernation
   inline static bool is_tenured_allocation_failure_gc(GCCause::Cause cause) {
-    assert(cause != GCCause::_old_generation_too_full_to_scavenge &&
-           cause != GCCause::_old_generation_expanded_on_last_scavenge,
-           "This GCCause may be correct but is not expected yet: %s",
-           to_string(cause));
-    // _tenured_generation_full for full tenured generations
     // _adaptive_size_policy for a full collection after a young GC
     // _allocation_failure is the generic cause a collection which could result
     // in the collection of the tenured generation if there is not enough space
     // in the tenured generation to support a young GC.
-    return (cause == GCCause::_tenured_generation_full ||
+    return (cause == GCCause::_adaptive_size_policy ||
-            cause == GCCause::_adaptive_size_policy ||
             cause == GCCause::_allocation_failure);
   }