8265907: JVM crashes when matching VectorMaskCmp Node for Neon backend

src/hotspot/cpu/aarch64/aarch64.ad

@@ -2414,6 +2414,11 @@ const bool Matcher::match_rule_supported_vector(int opcode, int vlen, BasicType
         return false;
       }
       break;
+    case Op_VectorMaskCmp:
+      if (vlen < 2 || bit_size < 64) {
+        return false;
+      }
+      break;
     default:
       break;
     }

test/hotspot/jtreg/compiler/vectorapi/TestVectorShuffleIota.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021, Huawei Technologies Co. Ltd. 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package compiler.vectorapi;
+
+import jdk.incubator.vector.IntVector;
+import jdk.incubator.vector.VectorSpecies;
+import jdk.incubator.vector.VectorShuffle;
+
+/*
+ * @test
+ * @bug 8265907
+ * @modules jdk.incubator.vector
+ * @run main/othervm compiler.vectorapi.TestVectorShuffleIota
+ */
+
+public class TestVectorShuffleIota {
+    static final VectorSpecies<Integer> SPECIESi = IntVector.SPECIES_128;
+
+    static final int INVOC_COUNT = 50000;
+
+    static int[] ai = {87, 65, 78, 71};
+
+    static void testShuffleI() {
+        IntVector iv = (IntVector) VectorShuffle.iota(SPECIESi, 0, 2, false).toVector();
+        iv.intoArray(ai, 0);
+    }
+
+    public static void main(String[] args) {
+        for (int i = 0; i < INVOC_COUNT; i++) {
+            testShuffleI();
+        }
+        for (int i = 0; i < ai.length; i++) {
+            System.out.print(ai[i] + ", ");
+        }
+        System.out.println();
+    }
+}