changeset 10323:23abf2feec96

8149916: Test case for 8149797 Reviewed-by: kvn
author roland
date Tue, 16 Feb 2016 12:54:20 +0100
parents db7934bcad3b
children df3a274ff883
files test/compiler/c2/TestDominatingDeadCheckCast.java
diffstat 1 files changed, 91 insertions(+), 0 deletions(-) [+]
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/c2/TestDominatingDeadCheckCast.java	Tue Feb 16 12:54:20 2016 +0100
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2016, 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 8149797
+ * @summary node replaced by dominating dead cast during parsing
+ * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:TypeProfileLevel=200 -XX:CompileCommand=dontinline,TestDominatingDeadCheckCast::not_inlined TestDominatingDeadCheckCast
+ *
+ */
+
+public class TestDominatingDeadCheckCast {
+
+    static class A {
+        int f;
+    }
+
+    static class B extends A {
+    }
+
+    static A not_inlined() {
+        return new A();
+    }
+
+    static void inlined(A param) {
+        param.f = 42;
+    }
+
+    static A field;
+
+    static void test(boolean flag1, boolean flag2, boolean flag3, boolean flag4, boolean flag5) {
+        // Go through memory rather than through a local to defeat C2's replace_in_map
+        field = not_inlined();
+        // Speculation adds a CheckCast on entry of this inlined
+        // method for the parameter
+        inlined(field);
+        // Walk up the dominators is depth limited, make the CheckCast
+        // above unreachable from the last inlined call
+        if (flag1) {
+            if (flag2) {
+                if (flag3) {
+                    // Speculation adds a CheckCast on entry of this
+                    // inlined method for the parameter. This
+                    // CheckCast is replaced by the CheckCast of the
+                    // first inlined method call but the replaced
+                    // CheckCast is still around during parsing.
+                    inlined(field);
+                    // Same as above, some useless control
+                    if (flag4) {
+                        if (flag5) {
+                            // Speculation adds a CheckCast on entry
+                            // of this inlined method for the
+                            // parameter. This CheckCast is replaced
+                            // by the dead CheckCast of the previous
+                            // inlined() call.
+                            inlined(field);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    static public void main(String[] args) {
+        field = new A();
+        for (int i = 0; i < 20000; i++) {
+            test(true, true, true, true, true);
+        }
+    }
+}