Add check if flag is available.

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

@@ -35,7 +35,7 @@ import jdk.test.lib.Asserts;
  * @library /test/lib /
  * @summary test combining vector not operation with compare
  * @modules jdk.incubator.vector
- * @requires (os.arch != "riscv64" | (os.arch == "riscv64" & vm.cpu.features ~= ".*rvv.*"))
+ * @requires vm.opt.final.MaxVectorSize == "null" | vm.opt.final.MaxVectorSize >= 16
  *
  * @run driver compiler.vectorapi.VectorMaskCompareNotTest
  */

test/jtreg-ext/requires/VMProps.java

@@ -149,6 +149,7 @@ public class VMProps implements Callable<Map<String, String>> {
         vmGC(map); // vm.gc.X = true/false
         vmGCforCDS(map); // may set vm.gc
         vmOptFinalFlags(map);
+        vmOptFinalIntxFlags(map);
 
         dump(map.map);
         log("Leaving call()");
@@ -389,6 +390,26 @@ public class VMProps implements Callable<Map<String, String>> {
         vmOptFinalFlag(map, "UseVectorizedMismatchIntrinsic");
     }
 
+    /**
+     * Selected final flag of type intx.
+     *
+     * @param map - property-value pairs
+     * @param flagName - flag name
+     */
+    private void vmOptFinalIntxFlag(SafeMap map, String flagName) {
+        map.put("vm.opt.final." + flagName,
+                () -> String.valueOf(WB.getIntxVMFlag(flagName)));
+    }
+
+    /**
+     * Selected sets of final flags of type intx.
+     *
+     * @param map - property-value pairs
+     */
+    protected void vmOptFinalIntxFlags(SafeMap map) {
+        vmOptFinalIntxFlag(map, "MaxVectorSize");
+    }
+
     /**
      * @return "true" if VM has a serviceability agent.
      */