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view graal/com.oracle.max.graal.jtt/src/com/oracle/graal/jtt/optimize/VN_Loop01.java @ 5059:ed559a528128
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author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 08 Mar 2012 17:57:30 +0100 |
parents | graal/com.oracle.max.graal.jtt/src/com/oracle/max/graal/jtt/optimize/VN_Loop01.java@5b04b33dac74 |
children | 4ed4295ce15f |
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/* * Copyright (c) 2009, 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. */ package com.oracle.max.graal.jtt.optimize; import org.junit.*; /* * Tests value numbering of integer operations. */ public class VN_Loop01 { private static boolean cond1 = true; private static boolean cond2 = true; public static int test(int arg) { if (arg == 0) { return test1(arg); } if (arg == 1) { return test2(arg); } if (arg == 2) { return test3(arg); } if (arg == 3) { return test4(arg); } return 0; } public static int test1(int x) { int c = 3; int t = x + c; while (cond1) { if (cond2) { int u = x + c; // GVN should recognize u == t return t + u; } } return 3; // GVN should recognize 3 == 3 } public static int test2(int x) { int c = 3; while (cond1) { int t = x + c; if (cond2) { int u = x + c; // GVN should recognize u == t return t + u; } } return 3; } public static int test3(int x) { int c = 3; int t = x + c; while (cond1) { if (cond2) { int u = x + c; // GVN should recognize u == t return t + u; } int u = x + c; // GVN should recognize u == t return t + u; } return 3; // GVN should recognize 3 == 3 } public static int test4(int x) { int c = 3; int t = x + c; while (cond1) { if (!cond2) { int u = x + c; return t + u; } int u = x + c; return t + u; } return 3; } @Test public void run0() throws Throwable { Assert.assertEquals(6, test(0)); } @Test public void run1() throws Throwable { Assert.assertEquals(8, test(1)); } @Test public void run2() throws Throwable { Assert.assertEquals(10, test(2)); } @Test public void run3() throws Throwable { Assert.assertEquals(12, test(3)); } @Test public void run4() throws Throwable { Assert.assertEquals(0, test(4)); } }