diff test/compiler/7029152/Test.java @ 2412:f9424955eb18

7029152: Ideal nodes for String intrinsics miss memory edge optimization Summary: In Ideal() method of String intrinsics nodes look for TypeAryPtr::CHARS memory slice if memory is MergeMem. Do not unroll a loop with String intrinsics code. Reviewed-by: never
author kvn
date Wed, 30 Mar 2011 12:08:49 -0700
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+++ b/test/compiler/7029152/Test.java	Wed Mar 30 12:08:49 2011 -0700
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+/*
+ * Copyright (c) 2011, 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 7029152
+ * @summary Ideal nodes for String intrinsics miss memory edge optimization
+ *
+ * @run main/othervm -Xbatch Test
+ */
+
+public class Test {
+
+  static final String str = "11111xx11111xx1x";
+  static int idx = 0;
+
+  static int IndexOfTest(String str) {
+    return str.indexOf("11111xx1x");
+  }
+
+  public static void main(String args[]) {
+    final int ITERS=2000000;
+
+    for (int i=0; i<ITERS; i++) {
+      idx = IndexOfTest(str);
+    }
+    System.out.println("IndexOf = " + idx);
+  }
+}