diff a/src/hotspot/cpu/x86/x86.ad b/src/hotspot/cpu/x86/x86.ad
--- a/src/hotspot/cpu/x86/x86.ad
+++ b/src/hotspot/cpu/x86/x86.ad
@@ -1,7 +1,7 @@
 //
-// Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.
+// Copyright (c) 2011, 2020, 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
 // under the terms of the GNU General Public License version 2 only, as
 // published by the Free Software Foundation.
@@ -1613,10 +1613,18 @@
   // Min size which can be loaded into vector is 4 bytes.
   int size = (type2aelembytes(bt) == 1) ? 4 : 2;
   return MIN2(size,max_size);
 }
 
+const bool Matcher::supports_scalable_vector() {
+  return false;
+}
+
+const int Matcher::scalable_vector_reg_size(const BasicType bt) {
+  return -1;
+}
+
 // Vector ideal reg corresponding to specified size in bytes
 const uint Matcher::vector_ideal_reg(int size) {
   assert(MaxVectorSize >= size, "");
   switch(size) {
     case  4: return Op_VecS;