8242211: Shenandoah: remove ShenandoahHeuristics::RegionData::_seqnum…

…_last_alloc

Reviewed-by: rkennke

src/hotspot/share/gc/shenandoah/shenandoahHeuristics.cpp

@@ -42,26 +42,6 @@ int ShenandoahHeuristics::compare_by_garbage(RegionData a, RegionData b) {
   else return 0;
 }
 
-int ShenandoahHeuristics::compare_by_garbage_then_alloc_seq_ascending(RegionData a, RegionData b) {
-  int r = compare_by_garbage(a, b);
-  if (r != 0) {
-    return r;
-  }
-  return compare_by_alloc_seq_ascending(a, b);
-}
-
-int ShenandoahHeuristics::compare_by_alloc_seq_ascending(RegionData a, RegionData b) {
-  if (a._seqnum_last_alloc == b._seqnum_last_alloc)
-    return 0;
-  else if (a._seqnum_last_alloc < b._seqnum_last_alloc)
-    return -1;
-  else return 1;
-}
-
-int ShenandoahHeuristics::compare_by_alloc_seq_descending(RegionData a, RegionData b) {
-  return -compare_by_alloc_seq_ascending(a, b);
-}
-
 ShenandoahHeuristics::ShenandoahHeuristics() :
   _region_data(NULL),
   _region_data_size(0),

src/hotspot/share/gc/shenandoah/shenandoahHeuristics.hpp

@@ -75,7 +75,6 @@ class ShenandoahHeuristics : public CHeapObj<mtGC> {
   typedef struct {
     ShenandoahHeapRegion* _region;
     size_t _garbage;
-    uint64_t _seqnum_last_alloc;
   } RegionData;
 
   RegionData* _region_data;
@@ -97,9 +96,6 @@ class ShenandoahHeuristics : public CHeapObj<mtGC> {
   ShenandoahSharedFlag _metaspace_oom;
 
   static int compare_by_garbage(RegionData a, RegionData b);
-  static int compare_by_garbage_then_alloc_seq_ascending(RegionData a, RegionData b);
-  static int compare_by_alloc_seq_ascending(RegionData a, RegionData b);
-  static int compare_by_alloc_seq_descending(RegionData a, RegionData b);
 
   RegionData* get_region_data_cache(size_t num);