src/hotspot/cpu/aarch64/aarch64.ad

@@ -9417,34 +9417,10 @@
     __ ldr(d, Address(s, BrooksPointer::byte_offset()));
   %}
   ins_pipe(pipe_class_memory);
 %}
 
-instruct shenandoahWB(iRegP_R0 dst, iRegP src, rFlagsReg cr) %{
-  match(Set dst (ShenandoahWriteBarrier src));
-  effect(KILL cr);
-
-  format %{ "shenandoah_wb $dst,$src" %}
-  ins_encode %{
-#if INCLUDE_SHENANDOAHGC
-    Label done;
-    Register s = $src$$Register;
-    Register d = $dst$$Register;
-    assert(d == r0, "result in r0");
-    __ block_comment("Shenandoah write barrier {");
-    // We need that first read barrier in order to trigger a SEGV/NPE on incoming NULL.
-    // Also, it brings s into d in preparation for the call to shenandoah_write_barrier().
-    __ ldr(d, Address(s, BrooksPointer::byte_offset()));
-    __ shenandoah_write_barrier(d);
-    __ block_comment("} Shenandoah write barrier");
-#else
-    ShouldNotReachHere();
-#endif
-  %}
-  ins_pipe(pipe_slow);
-%}
-
 
 // Convert oop pointer into compressed form
 instruct encodeHeapOop(iRegNNoSp dst, iRegP src, rFlagsReg cr) %{
   predicate(n->bottom_type()->make_ptr()->ptr() != TypePtr::NotNull);
   match(Set dst (EncodeP src));