add jtreg test

test/hotspot/jtreg/compiler/inlining/TestPolymorphicInlining.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2025, Alibaba Group Holding Limited. 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.
+ */
+
+/*
+ * @test TestPolymorphicInlining
+ * @summary invoke tripple morphic method and see if either one is inlined.
+ * @library /test/lib
+ * @run main TestPolymorphicInlining
+ */
+
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+public class TestPolymorphicInlining {
+    public static void main(String[] args) throws Exception {
+        ProcessBuilder pb1 = ProcessTools.createJavaProcessBuilder(
+                "-XX:+UnlockDiagnosticVMOptions",
+                "-XX:+PrintInlining",
+                "-XX:+PolymorphicInlining",
+                Test.class.getName());
+        OutputAnalyzer output1 = new OutputAnalyzer(pb1.start());
+        output1.shouldMatch("TestPolymorphicInlining\\$Test\\$Child\\d::foo.*inline");
+        output1.shouldHaveExitValue(0);
+
+        ProcessBuilder pb2 = ProcessTools.createJavaProcessBuilder(
+                "-XX:+UnlockDiagnosticVMOptions",
+                "-XX:+PrintInlining",
+                "-XX:-PolymorphicInlining",
+                Test.class.getName());
+        OutputAnalyzer output2 = new OutputAnalyzer(pb2.start());
+        output2.shouldNotContain("TestPolymorphicInlining$Test$Child");
+        output2.shouldHaveExitValue(0);
+    }
+    static class Test {
+        private final int x = -1;
+        private static int n = 1000000;
+        private final Parent c1 = new Child1();
+        private final Parent c2 = new Child2();
+        private final Parent c3 = new Child3();
+
+        class Parent {
+            int foo() {
+                return x;
+            }
+        }
+
+        class Child1 extends Parent {
+            int foo() {
+                return x;
+            }
+        }
+
+        class Child2 extends Parent {
+            int foo() {
+                return x;
+            }
+        }
+
+        class Child3 extends Parent {
+            int foo() {
+                return x;
+            }
+        }
+
+        int invoke(Parent p) {
+            return p.foo();
+        }
+
+        public static void main(String[] args) throws Exception {
+            Test test = new Test();
+            int x = 0;
+            while (n-- > 0) {
+                x += test.invoke(test.c1) + test.invoke(test.c2) + test.invoke(test.c3);
+            }
+        }
+    }
+}