test/hotspot/jtreg/vmTestbase/vm/compiler/jbe/dead/dead08/dead08.java
changeset 50366 4d85990f9c4a
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/vm/compiler/jbe/dead/dead08/dead08.java	Fri Jun 01 15:48:55 2018 -0700
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2002, 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.
+ */
+
+/*
+ * @test
+ *
+ * @summary converted from VM Testbase runtime/jbe/dead/dead08.
+ * VM Testbase keywords: [quick, runtime]
+ *
+ * @library /vmTestbase
+ *          /test/lib
+ * @run driver jdk.test.lib.FileInstaller . .
+ * @run main/othervm vm.compiler.jbe.dead.dead08.dead08
+ */
+
+package vm.compiler.jbe.dead.dead08;
+
+/* -- Test the elimination of dead assignment to class fields within an IF statement
+
+In the example below, the values assigned to i1-i7 in struct within th IF statement are never used,thus can be eliminated.
+
+ */
+
+class struct {
+    int i1 = 2;
+    int i2 = 3;
+    int i3 = 4;
+    int i4 = 5;
+    int i5 = 6;
+    int i6 = 7;
+    int i7 = 8;
+    int i8 = 9;
+}
+
+public class dead08 {
+  boolean bol = true;
+
+  public static void main(String args[]) {
+    dead08 dce = new dead08();
+
+    System.out.println("f()="+dce.f()+"; fopt()="+dce.fopt());
+    if (dce.f() == dce.fopt()) {
+      System.out.println("Test dead08 Passed.");
+    } else {
+      throw new Error("Test dead08 Failed: f()=" + dce.f() + " != fopt()=" + dce.fopt());
+    }
+  }
+
+  int f() {
+    struct s = new struct();
+
+    if (bol)
+      s.i1 = 1;
+    if (bol)
+      s.i2 = 2;
+    if (bol)
+      s.i3 = 3;
+    if (bol)
+      s.i4 = 4;
+    if (bol)
+      s.i5 = 5;
+    if (bol)
+      s.i6 = 6;
+    if (bol)
+      s.i7 = 7;
+    if (bol)
+      s.i8 = 8;
+
+    if (bol)
+      s.i1 = 1;
+    if (bol)
+      s.i2 = 2;
+    if (bol)
+      s.i3 = 3;
+    if (bol)
+      s.i4 = 4;
+    if (bol)
+      s.i5 = 5;
+    if (bol)
+      s.i6 = 6;
+    if (bol)
+      s.i7 = 7;
+    if (bol)
+      s.i8 = 8;
+
+    if (bol)
+      s.i1 = 1;
+    if (bol)
+      s.i2 = 2;
+    if (bol)
+      s.i3 = 3;
+    if (bol)
+      s.i4 = 4;
+    if (bol)
+      s.i5 = 5;
+    if (bol)
+      s.i6 = 6;
+    if (bol)
+      s.i7 = 7;
+    if (bol)
+      s.i8 = 8;
+
+    return s.i8;
+  }
+
+  // Code fragment after dead code elimination
+  int fopt() {
+    struct s = new struct();
+
+    s.i8 = 8;
+    return s.i8;
+  }
+}