--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/tiered/Level2RecompilationTest.java	Tue May 07 09:17:03 2019 +0200
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 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
+ * 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 Level2RecompilationTest
+ * @summary Test downgrading mechanism from level 3 to level 2 for those profiled methods.
+ * @library /test/lib /
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ *
+ * @build sun.hotspot.WhiteBox
+ * @run driver ClassFileInstaller sun.hotspot.WhiteBox
+ *                                sun.hotspot.WhiteBox$WhiteBoxPermission
+ * @run main/othervm -Xbootclasspath/a:. -XX:+TieredCompilation
+ *                   -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:-UseCounterDecay
+ *                   -XX:CompileCommand=compileonly,compiler.whitebox.SimpleTestCaseHelper::*
+ *                   -XX:CompileCommand=print,compiler.whitebox.SimpleTestCaseHelper::*
+ *                   compiler.tiered.Level2RecompilationTest
+ */
+
+package compiler.tiered;
+
+import compiler.whitebox.CompilerWhiteBoxTest;
+import jtreg.SkippedException;
+
+public class Level2RecompilationTest extends CompLevelsTest {
+    public static void main(String[] args) throws Throwable {
+        if (CompilerWhiteBoxTest.skipOnTieredCompilation(false)) {
+            throw new SkippedException("Test isn't applicable for non-tiered mode");
+        }
+        String[] testcases = {"METHOD_TEST", "OSR_STATIC_TEST"};
+        CompilerWhiteBoxTest.main(Level2RecompilationTest::new, testcases);
+    }
+
+    protected Level2RecompilationTest(TestCase testCase) {
+        super(testCase);
+        // to prevent inlining of #method
+        WHITE_BOX.testSetDontInlineMethod(method, true);
+    }
+
+    @Override
+    protected void test() throws Exception {
+        if (skipXcompOSR()) {
+          return;
+        }
+
+        checkNotCompiled();
+        int bci = WHITE_BOX.getMethodEntryBci(method);
+        WHITE_BOX.markMethodProfiled(method);
+        if (testCase.isOsr()) {
+            // for OSR compilation, it must be the begin of a BB.
+            // c1_GraphBulider.cpp:153  assert(method()->bci_block_start().at(cur_bci), ...
+            bci = 0;
+        }
+
+        WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_PROFILE, bci);
+        checkCompiled();
+        checkLevel(COMP_LEVEL_LIMITED_PROFILE, getCompLevel());
+
+        for (int i=0; i<1_000; ++i) {
+            WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_FULL_PROFILE, bci);
+            waitBackgroundCompilation();
+            checkLevel(COMP_LEVEL_LIMITED_PROFILE, getCompLevel());
+        }
+    }
+
+    @Override
+    protected void checkLevel(int expected, int actual) {
+        if (expected == COMP_LEVEL_FULL_PROFILE
+                && actual == COMP_LEVEL_LIMITED_PROFILE) {
+            // for simple method full_profile may be replaced by limited_profile
+            if (IS_VERBOSE) {
+                System.out.printf("Level check: full profiling was replaced "
+                        + "by limited profiling. Expected: %d, actual:%d\n",
+                        expected, actual);
+            }
+            return;
+        }
+        super.checkLevel(expected, actual);
+    }
+}
+