--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/6823354/Test6823354.java	Wed May 06 00:27:52 2009 -0700
@@ -0,0 +1,266 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 6823354
+ * @summary These methods can be instrinsified by using bit scan, bit test, and population count instructions.
+ *
+ * @run main/othervm -Xcomp -XX:CompileOnly=Test6823354.lzcomp,Test6823354.tzcomp,.dolzcomp,.dotzcomp Test6823354
+ */
+
+import java.net.URLClassLoader;
+
+public class Test6823354 {
+    // Arrays of corner case values.
+    static final int[]  ia = new int[]  { 0,  1,  -1,  Integer.MIN_VALUE, Integer.MAX_VALUE };
+    static final long[] la = new long[] { 0L, 1L, -1L, Long.MIN_VALUE,    Long.MAX_VALUE    };
+
+    public static void main(String[] args) throws Exception {
+        // Load the classes and the methods.
+        Integer.numberOfLeadingZeros(0);
+        Integer.numberOfTrailingZeros(0);
+        Long.numberOfLeadingZeros(0);
+        Long.numberOfTrailingZeros(0);
+
+        lz();
+        tz();
+    }
+
+    static void lz() throws Exception {
+        // int
+
+        // Test corner cases.
+        for (int i = 0; i < ia.length; i++) {
+            int x = ia[i];
+            check(x, lzcomp(x), lzint(x));
+        }
+
+        // Test all possible return values.
+        for (int i = 0; i < Integer.SIZE; i++) {
+            int x = 1 << i;
+            check(x, lzcomp(x), lzint(x));
+        }
+
+        String classname = "Test6823354$lzconI";
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < ia.length; i++) {
+            testclass(classname, ia[i]);
+        }
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < Integer.SIZE; i++) {
+            int x = 1 << i;
+            testclass(classname, x);
+        }
+
+
+        // long
+
+        // Test corner cases.
+        for (int i = 0; i < ia.length; i++) {
+            long x = la[i];
+            check(x, lzcomp(x), lzint(x));
+        }
+
+        // Test all possible return values.
+        for (int i = 0; i < Long.SIZE; i++) {
+            long x = 1L << i;
+            check(x, lzcomp(x), lzint(x));
+        }
+
+        classname = "Test6823354$lzconL";
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < la.length; i++) {
+            testclass(classname, la[i]);
+        }
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < Long.SIZE; i++) {
+            long x = 1L << i;
+            testclass(classname, x);
+        }
+    }
+
+    static void tz() throws Exception {
+        // int
+
+        // Test corner cases.
+        for (int i = 0; i < ia.length; i++) {
+            int x = ia[i];
+            check(x, tzcomp(x), tzint(x));
+        }
+
+        // Test all possible return values.
+        for (int i = 0; i < Integer.SIZE; i++) {
+            int x = 1 << i;
+            check(x, tzcomp(x), tzint(x));
+        }
+
+        String classname = "Test6823354$tzconI";
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < ia.length; i++) {
+            testclass(classname, ia[i]);
+        }
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < Integer.SIZE; i++) {
+            int x = 1 << i;
+            testclass(classname, x);
+        }
+
+
+        // long
+
+        // Test corner cases.
+        for (int i = 0; i < la.length; i++) {
+            long x = la[i];
+            check(x, tzcomp(x), tzint(x));
+        }
+
+        // Test all possible return values.
+        for (int i = 0; i < Long.SIZE; i++) {
+            long x = 1L << i;
+            check(x, tzcomp(x), tzint(x));
+        }
+
+        classname = "Test6823354$tzconL";
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < la.length; i++) {
+            testclass(classname, la[i]);
+        }
+
+        // Test Ideal optimizations (constant values).
+        for (int i = 0; i < Long.SIZE; i++) {
+            long x = 1L << i;
+            testclass(classname, x);
+        }
+    }
+
+    static void check(int value, int result, int expected) {
+        //System.out.println(value + ": " + result + ", " + expected);
+        if (result != expected)
+            throw new InternalError(value + " failed: " + result + " != " + expected);
+    }
+
+    static void check(long value, long result, long expected) {
+        //System.out.println(value + ": " + result + ", " + expected);
+        if (result != expected)
+            throw new InternalError(value + " failed: " + result + " != " + expected);
+    }
+
+    static int lzint( int i)  { return Integer.numberOfLeadingZeros(i); }
+    static int lzcomp(int i)  { return Integer.numberOfLeadingZeros(i); }
+
+    static int lzint( long l) { return Long.numberOfLeadingZeros(l); }
+    static int lzcomp(long l) { return Long.numberOfLeadingZeros(l); }
+
+    static int tzint( int i)  { return Integer.numberOfTrailingZeros(i); }
+    static int tzcomp(int i)  { return Integer.numberOfTrailingZeros(i); }
+
+    static int tzint( long l) { return Long.numberOfTrailingZeros(l); }
+    static int tzcomp(long l) { return Long.numberOfTrailingZeros(l); }
+
+    static void testclass(String classname, int x) throws Exception {
+        System.setProperty("value", "" + x);
+        loadandrunclass(classname);
+    }
+
+    static void testclass(String classname, long x) throws Exception {
+        System.setProperty("value", "" + x);
+        loadandrunclass(classname);
+    }
+
+    static void loadandrunclass(String classname) throws Exception {
+        Class cl = Class.forName(classname);
+        URLClassLoader apploader = (URLClassLoader) cl.getClassLoader();
+        ClassLoader loader = new URLClassLoader(apploader.getURLs(), apploader.getParent());
+        Class c = loader.loadClass(classname);
+        Runnable r = (Runnable) c.newInstance();
+        r.run();
+    }
+
+    public static class lzconI implements Runnable {
+        static final int VALUE;
+
+        static {
+            int value = 0;
+            try {
+                value = Integer.decode(System.getProperty("value"));
+            } catch (Throwable e) {}
+            VALUE = value;
+        }
+
+        public void run() { check(VALUE, lzint(VALUE), dolzcomp()); }
+        static int dolzcomp() { return lzcomp(VALUE); }
+    }
+
+    public static class lzconL implements Runnable {
+        static final long VALUE;
+
+        static {
+            long value = 0;
+            try {
+                value = Long.decode(System.getProperty("value"));
+            } catch (Throwable e) {}
+            VALUE = value;
+        }
+
+        public void run() { check(VALUE, lzint(VALUE), dolzcomp()); }
+        static int dolzcomp() { return lzcomp(VALUE); }
+    }
+
+    public static class tzconI implements Runnable {
+        static final int VALUE;
+
+        static {
+            int value = 0;
+            try {
+                value = Integer.decode(System.getProperty("value"));
+            } catch (Throwable e) {}
+            VALUE = value;
+        }
+
+        public void run() { check(VALUE, tzint(VALUE), dotzcomp()); }
+        static int dotzcomp() { return tzcomp(VALUE); }
+    }
+
+    public static class tzconL implements Runnable {
+        static final long VALUE;
+
+        static {
+            long value = 0;
+            try {
+                value = Long.decode(System.getProperty("value"));
+            } catch (Throwable e) {}
+            VALUE = value;
+        }
+
+        public void run() { check(VALUE, tzint(VALUE), dotzcomp()); }
+        static int dotzcomp() { return tzcomp(VALUE); }
+    }
+}