--- old/src/hotspot/cpu/x86/c1_Runtime1_x86.cpp	2019-03-11 14:24:50.470356202 +0100
+++ new/src/hotspot/cpu/x86/c1_Runtime1_x86.cpp	2019-03-11 14:24:50.274356205 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1103,6 +1103,7 @@
 
     case new_type_array_id:
     case new_object_array_id:
+    case new_value_array_id:
       {
         Register length   = rbx; // Incoming
         Register klass    = rdx; // Incoming
@@ -1110,8 +1111,10 @@
 
         if (id == new_type_array_id) {
           __ set_info("new_type_array", dont_gc_arguments);
-        } else {
+        } else if (id == new_object_array_id) {
           __ set_info("new_object_array", dont_gc_arguments);
+        } else {
+          __ set_info("new_value_array", dont_gc_arguments);
         }
 
 #ifdef ASSERT
@@ -1121,12 +1124,28 @@
           Register t0 = obj;
           __ movl(t0, Address(klass, Klass::layout_helper_offset()));
           __ sarl(t0, Klass::_lh_array_tag_shift);
-          int tag = ((id == new_type_array_id)
-                     ? Klass::_lh_array_tag_type_value
-                     : Klass::_lh_array_tag_obj_value);
-          __ cmpl(t0, tag);
-          __ jcc(Assembler::equal, ok);
-          __ stop("assert(is an array klass)");
+          switch (id) {
+          case new_type_array_id:
+            __ cmpl(t0, Klass::_lh_array_tag_type_value);
+            __ jcc(Assembler::equal, ok);
+            __ stop("assert(is a type array klass)");
+            break;
+          case new_object_array_id:
+          case new_value_array_id: // <-- needs to be renamed to new_non_null_array_id!
+            // FIXME:
+            // The VM currently does not distinguish between anewarray of
+            // "[QV;" (elements are non-nullable) vs "[LV;" (elements may be null).
+            // Instead, both are treated essentially as "[QV;". This code needs
+            // to be reimplemented after proper support of "[LV;" is implemented in the VM.
+            //
+            __ cmpl(t0, Klass::_lh_array_tag_obj_value);
+            __ jcc(Assembler::equal, ok);
+            __ cmpl(t0, Klass::_lh_array_tag_vt_value);
+            __ jcc(Assembler::equal, ok);
+            __ stop("assert(is an object or value array klass)");
+            break;
+          default:  ShouldNotReachHere();
+          }
           __ should_not_reach_here();
           __ bind(ok);
         }
@@ -1179,6 +1198,8 @@
         if (id == new_type_array_id) {
           call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
         } else {
+          // Runtime1::new_object_array handles both object and value arrays.
+          // See comments in the ASSERT block above.
           call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
         }
 
@@ -1211,6 +1232,44 @@
       }
       break;
 
+    case load_flattened_array_id:
+      {
+        StubFrame f(sasm, "load_flattened_array", dont_gc_arguments);
+        OopMap* map = save_live_registers(sasm, 3);
+
+        // Called with store_parameter and not C abi
+
+        f.load_argument(1, rax); // rax,: array
+        f.load_argument(0, rbx); // rbx,: index
+        int call_offset = __ call_RT(rax, noreg, CAST_FROM_FN_PTR(address, load_flattened_array), rax, rbx);
+
+        oop_maps = new OopMapSet();
+        oop_maps->add_gc_map(call_offset, map);
+        restore_live_registers_except_rax(sasm);
+
+        // rax,: loaded element at array[index]
+        __ verify_oop(rax);
+      }
+      break;
+
+    case store_flattened_array_id:
+      {
+        StubFrame f(sasm, "store_flattened_array", dont_gc_arguments);
+        OopMap* map = save_live_registers(sasm, 4);
+
+        // Called with store_parameter and not C abi
+
+        f.load_argument(2, rax); // rax,: array
+        f.load_argument(1, rbx); // rbx,: index
+        f.load_argument(0, rcx); // rcx,: value
+        int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, store_flattened_array), rax, rbx, rcx);
+
+        oop_maps = new OopMapSet();
+        oop_maps->add_gc_map(call_offset, map);
+        restore_live_registers_except_rax(sasm);
+      }
+      break;
+
     case register_finalizer_id:
       {
         __ set_info("register_finalizer", dont_gc_arguments);
@@ -1312,11 +1371,17 @@
       break;
 
     case throw_incompatible_class_change_error_id:
-      { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
+      { StubFrame f(sasm, "throw_incompatible_class_change_error", dont_gc_arguments);
         oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
       }
       break;
 
+    case throw_illegal_monitor_state_exception_id:
+      { StubFrame f(sasm, "throw_illegal_monitor_state_exception", dont_gc_arguments);
+        oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_illegal_monitor_state_exception), false);
+      }
+      break;
+
     case slow_subtype_check_id:
       {
         // Typical calling sequence: