test/hotspot/jtreg/compiler/gcbarriers/TestZGCBarrierElision.java

*** 27,21 ***
  import java.lang.invoke.VarHandle;
  import java.lang.invoke.MethodHandles;
  import java.util.concurrent.ThreadLocalRandom;
  
  /**
!  * @test
   * @summary Test that the ZGC barrier elision optimization does not elide
   *          necessary barriers. The tests use volatile memory accesses and
   *          blackholes to prevent C2 from simply optimizing them away.
   * @library /test/lib /
   * @requires vm.gc.ZGenerational
   * @run driver compiler.gcbarriers.TestZGCBarrierElision test-correctness
   */
  
  /**
!  * @test
   * @summary Test that the ZGC barrier elision optimization elides unnecessary
   *          barriers following simple allocation and domination rules.
   * @library /test/lib /
   * @requires vm.gc.ZGenerational & (vm.simpleArch == "x64" | vm.simpleArch == "aarch64")
   * @run driver compiler.gcbarriers.TestZGCBarrierElision test-effectiveness
--- 27,21 ---
  import java.lang.invoke.VarHandle;
  import java.lang.invoke.MethodHandles;
  import java.util.concurrent.ThreadLocalRandom;
  
  /**
!  * @test id=Z
   * @summary Test that the ZGC barrier elision optimization does not elide
   *          necessary barriers. The tests use volatile memory accesses and
   *          blackholes to prevent C2 from simply optimizing them away.
   * @library /test/lib /
   * @requires vm.gc.ZGenerational
   * @run driver compiler.gcbarriers.TestZGCBarrierElision test-correctness
   */
  
  /**
!  * @test id=ZGen
   * @summary Test that the ZGC barrier elision optimization elides unnecessary
   *          barriers following simple allocation and domination rules.
   * @library /test/lib /
   * @requires vm.gc.ZGenerational & (vm.simpleArch == "x64" | vm.simpleArch == "aarch64")
   * @run driver compiler.gcbarriers.TestZGCBarrierElision test-effectiveness

*** 193,11 ***
          Common.blackhole(o);
          Common.field1VarHandle.getAndSet​(o, i);
      }
  
      @Test
!     @IR(counts = { IRNode.Z_LOAD_P_WITH_BARRIER_FLAG, Common.REMAINING, "1" }, phase = CompilePhase.FINAL_CODE)
      @IR(counts = { IRNode.Z_GET_AND_SET_P_WITH_BARRIER_FLAG, Common.REMAINING, "1" }, phase = CompilePhase.FINAL_CODE)
      static void testLoadThenAtomic(Outer o, Inner i) {
          Common.blackhole(o.field1);
          Common.field1VarHandle.getAndSet​(o, i);
      }
--- 193,12 ---
          Common.blackhole(o);
          Common.field1VarHandle.getAndSet​(o, i);
      }
  
      @Test
! // TODO 8329234
+ //    @IR(counts = { IRNode.Z_LOAD_P_WITH_BARRIER_FLAG, Common.REMAINING, "1" }, phase = CompilePhase.FINAL_CODE)
      @IR(counts = { IRNode.Z_GET_AND_SET_P_WITH_BARRIER_FLAG, Common.REMAINING, "1" }, phase = CompilePhase.FINAL_CODE)
      static void testLoadThenAtomic(Outer o, Inner i) {
          Common.blackhole(o.field1);
          Common.field1VarHandle.getAndSet​(o, i);
      }