src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.cpp

rev 50922 : Don't generate arraycopy pre-barrier calls for traversal GC

*** 25,34 ****
--- 25,35 ----
  #include "gc/shenandoah/brooksPointer.hpp"
  #include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp"
  #include "gc/shenandoah/shenandoahConnectionMatrix.hpp"
  #include "gc/shenandoah/shenandoahHeap.hpp"
  #include "gc/shenandoah/shenandoahHeapRegion.hpp"
+ #include "gc/shenandoah/shenandoahHeuristics.hpp"
  #include "gc/shenandoah/shenandoahRuntime.hpp"
  #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
  #include "interpreter/interpreter.hpp"
  #include "interpreter/interp_masm.hpp"
  #include "runtime/sharedRuntime.hpp"
*** 44,53 ****
--- 45,59 ----
  address ShenandoahBarrierSetAssembler::_shenandoah_wb = NULL;
  address ShenandoahBarrierSetAssembler::_shenandoah_wb_C = NULL;
  
  void ShenandoahBarrierSetAssembler::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, bool is_oop,
                                                         Register addr, Register count, RegSet saved_regs) {
+   if (ShenandoahHeap::heap()->heuristics()->can_do_traversal_gc()) {
+     // Don't need arraycopy-pre-barrier for traversal. No need to pointlessly
+     // call out to runtime.
+     return;
+   }
    if (is_oop) {
      bool dest_uninitialized = (decorators & AS_DEST_NOT_INITIALIZED) != 0;
      if (!dest_uninitialized) {
        __ push(saved_regs, sp);
        if (count == c_rarg0) {