--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/runtime/TestFloatsOnStackDeopt.java Fri May 18 13:23:28 2018 +0300
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2018, 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.
+ */
+
+package compiler.runtime;
+
+/*
+ * @test
+ * @summary testing deoptimization on safepoint with floating point values on stack
+ * @bug 8202710
+ * @run main/othervm -XX:+DeoptimizeALot
+ * -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions
+ * compiler.runtime.TestFloatsOnStackDeopt
+ */
+
+public class TestFloatsOnStackDeopt {
+
+ private static final int ARRLEN = 97;
+ private static final int ITERS1 = 100;
+ private static final int ITERS2 = 40000;
+ private static final float VALUE = 15.f;
+ public static String dummyString = "long long string";
+
+ static void run_loop_with_safepoint(float[] a0, float b) {
+ // Non-counted loop with safepoint.
+ for (long l = 0; l < ITERS2; l++) {
+ // Counted and vectorized loop.
+ for (int i = 0; i < a0.length; i += 1) {
+ a0[i] += b;
+ }
+ }
+ }
+
+ static int test() {
+ // thread provokes frequent GC - together with +DeoptimizeALot and safepoint it forces executed function deoptimization
+ Thread th = new Thread() {
+ public void run() {
+ while(true) {
+ synchronized(this) { try { wait(1); } catch (Exception ex) {} }
+ dummyString += dummyString;
+ if (dummyString.length() > 1024*1024) { dummyString = "long long string"; }
+ }
+ }
+ };
+ th.start();
+
+ int errn = 0;
+ for (int j = 0; j < ITERS1; j++) {
+ float[] x0 = new float[ARRLEN];
+ run_loop_with_safepoint(x0, VALUE);
+ for (int i = 0; i < ARRLEN; i++) {
+ if (x0[i] != VALUE * ITERS2) {
+ System.err.println("(" + j + "): " + "x0[" + i + "] = " + x0[i] + " != " + VALUE * ITERS2);
+ errn++;
+ }
+ x0[i] = 0.f; // Reset
+ }
+ if (errn > 0) break;
+ }
+
+ th.stop();
+ return errn;
+ }
+
+ public static void main(String args[]) {
+ int errn = test();
+ System.err.println((errn > 0) ? "FAILED" : "PASSED");
+ }
+}
+