diff test/compiler/8000805/Test8000805.java @ 6891:67f4c477c9ab

8000805: JMM issue: short loads are non-atomic Summary: perform transforms during IGVN phase when Load has a single user. Reviewed-by: jrose, kvn, twisti
author vlivanov
date Mon, 22 Oct 2012 11:44:30 -0700
parents
children 7369298bec7e
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/8000805/Test8000805.java	Mon Oct 22 11:44:30 2012 -0700
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2012, 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
+ * @bug 8000805
+ * @summary JMM issue: short loads are non-atomic
+ *
+ * @run main/othervm -server -XX:-TieredCompilation -Xcomp -XX:+PrintCompilation -XX:CompileOnly=Test8000805.loadS2LmaskFF,Test8000805.loadS2Lmask16,Test8000805.loadS2Lmask13,Test8000805.loadUS_signExt,Test8000805.loadB2L_mask8 Test8000805
+ */
+
+public class Test8000805 {
+    static long loadS2LmaskFF   (short[] sa) { return sa[0] & 0xFF; }
+    static long loadS2LmaskFF_1 (short[] sa) { return sa[0] & 0xFF; }
+
+    static long loadS2Lmask16   (short[] sa) { return sa[0] & 0xFFFE; }
+    static long loadS2Lmask16_1 (short[] sa) { return sa[0] & 0xFFFE; }
+
+    static long loadS2Lmask13   (short[] sa) { return sa[0] & 0x0FFF; }
+    static long loadS2Lmask13_1 (short[] sa) { return sa[0] & 0x0FFF; }
+
+    static int loadUS_signExt   (char[] ca) { return (ca[0] << 16) >> 16; }
+    static int loadUS_signExt_1 (char[] ca) { return (ca[0] << 16) >> 16; }
+
+    static long loadB2L_mask8   (byte[] ba) { return ba[0] & 0x55; }
+    static long loadB2L_mask8_1 (byte[] ba) { return ba[0] & 0x55; }
+
+    public static void main(String[] args) {
+        for (int i = Byte.MIN_VALUE; i < Byte.MAX_VALUE; i++) {
+            byte[] ba = new byte[]  { (byte) i};
+
+            { long v1 = loadB2L_mask8(ba);
+              long v2 = loadB2L_mask8_1(ba);
+              if (v1 != v2)
+              throw new InternalError(String.format("loadB2L_mask8 failed: %x != %x", v1, v2)); }
+        }
+
+        for (int i = Short.MIN_VALUE; i < Short.MAX_VALUE; i++) {
+            short[] sa = new short[] { (short)i };
+            char[] ca = new char[] { (char)i };
+
+            { long v1 = loadS2LmaskFF(sa);
+              long v2 = loadS2LmaskFF_1(sa);
+              if (v1 != v2)
+              throw new InternalError(String.format("loadS2LmaskFF failed: %x != %x", v1, v2)); }
+
+            { long v1 = loadS2Lmask16(sa);
+              long v2 = loadS2Lmask16_1(sa);
+              if (v1 != v2)
+              throw new InternalError(String.format("loadS2Lmask16 failed: %x != %x", v1, v2)); }
+
+            { long v1 = loadS2Lmask13(sa);
+              long v2 = loadS2Lmask13_1(sa);
+              if (v1 != v2)
+              throw new InternalError(String.format("loadS2Lmask13 failed: %x != %x", v1, v2)); }
+
+            { int v1 = loadUS_signExt(ca);
+              int v2 = loadUS_signExt_1(ca);
+              if (v1 != v2)
+                throw new InternalError(String.format("loadUS_signExt failed: %x != %x", v1, v2)); }
+        }
+
+        System.out.println("TEST PASSED.");
+    }
+}