src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp

remove c1 runtime1 medium slowpath

     // have to fall back to the JNI stub
     __ stp(dst,     dst_pos, Address(sp, 0*BytesPerWord));
     __ stp(length,  src_pos, Address(sp, 2*BytesPerWord));
     __ str(src,              Address(sp, 4*BytesPerWord));
 
-    address C_entry = CAST_FROM_FN_PTR(address, Runtime1::arraycopy);
     address copyfunc_addr = StubRoutines::generic_arraycopy();
+    assert(copyfunc_addr != NULL, "generic arraycopy stub required");
 
     // The arguments are in java calling convention so we shift them
     // to C convention
     assert_different_registers(c_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4);
     __ mov(c_rarg0, j_rarg0);

@@ -2186,38 +2186,31
     assert_different_registers(c_rarg2, j_rarg3, j_rarg4);
     __ mov(c_rarg2, j_rarg2);
     assert_different_registers(c_rarg3, j_rarg4);
     __ mov(c_rarg3, j_rarg3);
     __ mov(c_rarg4, j_rarg4);
-    if (copyfunc_addr == NULL) { // Use C version if stub was not generated
-      __ mov(rscratch1, RuntimeAddress(C_entry));
-      __ blrt(rscratch1, 5, 0, 1);
-    } else {
 #ifndef PRODUCT
-      if (PrintC1Statistics) {
-        __ incrementw(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
-      }
-#endif
-      __ far_call(RuntimeAddress(copyfunc_addr));
+    if (PrintC1Statistics) {
+      __ incrementw(ExternalAddress((address)&Runtime1::_generic_arraycopystub_cnt));
     }
+#endif
+    __ far_call(RuntimeAddress(copyfunc_addr));
 
     __ cbz(r0, *stub->continuation());
 
     // Reload values from the stack so they are where the stub
     // expects them.
     __ ldp(dst,     dst_pos, Address(sp, 0*BytesPerWord));
     __ ldp(length,  src_pos, Address(sp, 2*BytesPerWord));
     __ ldr(src,              Address(sp, 4*BytesPerWord));
 
-    if (copyfunc_addr != NULL) {
-      // r0 is -1^K where K == partial copied count
-      __ eonw(rscratch1, r0, 0);
-      // adjust length down and src/end pos up by partial copied count
-      __ subw(length, length, rscratch1);
-      __ addw(src_pos, src_pos, rscratch1);
-      __ addw(dst_pos, dst_pos, rscratch1);
-    }
+    // r0 is -1^K where K == partial copied count
+    __ eonw(rscratch1, r0, 0);
+    // adjust length down and src/end pos up by partial copied count
+    __ subw(length, length, rscratch1);
+    __ addw(src_pos, src_pos, rscratch1);
+    __ addw(dst_pos, dst_pos, rscratch1);
     __ b(*stub->entry());
 
     __ bind(*stub->continuation());
     return;
   }