Mercurial > hg > truffle
view graal/com.oracle.graal.compiler.hsail.test/src/com/oracle/graal/compiler/hsail/test/AtomicReferenceGetAndSetTest.java @ 13462:5f54b8a68346
limit complexity of redundant move elimination
author | Erik Eckstein <erik.eckstein@oracle.com> |
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date | Thu, 19 Dec 2013 08:35:37 +0100 |
parents | 40924dbc623b |
children | de1d50c121cd |
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/* * Copyright (c) 2013, 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.graal.compiler.hsail.test; import java.util.concurrent.atomic.*; import org.junit.*; import sun.misc.*; import com.oracle.graal.compiler.hsail.test.infra.*; import com.oracle.graal.debug.*; /** * Tests {@link AtomicReference#getAndSet(Object)} which indirectly tests * {@link Unsafe#compareAndSwapObject(Object, long, Object, Object)}. The latter requires special * handling if compressed oops are enabled. */ public class AtomicReferenceGetAndSetTest extends GraalKernelTester { static final int NUM = 20; @Result public int[] followedCount = new int[NUM]; public MyObj[] inArray = new MyObj[NUM]; AtomicReference<MyObj> atomicRef = new AtomicReference<>(); public static class MyObj { public int val; public boolean[] followedBy = new boolean[NUM + 1]; MyObj(int n) { val = n; } } void setupArrays() { for (int i = 0; i < NUM; i++) { inArray[i] = new MyObj(i + 1); } atomicRef.set(new MyObj(0)); // initial value } private static final boolean DEBUG = false; @Override public void runTest() { setupArrays(); dispatchMethodKernel(NUM); // make a fake followedBy for the final object MyObj finalObj = atomicRef.get(); finalObj.followedBy[0] = true; // When the kernel is done, compute the number of true bits in each followedBy array; for (int i = 0; i < NUM; i++) { MyObj obj = inArray[i]; int count = 0; for (int j = 0; j < NUM + 1; j++) { boolean b = obj.followedBy[j]; if (b) { count++; if (DEBUG) { TTY.println("obj " + obj.val + " was followed by " + j); } } } followedCount[i] = count; } } public void run(int gid) { MyObj newObj = inArray[gid]; MyObj oldObj = atomicRef.getAndSet(newObj); oldObj.followedBy[newObj.val] = true; } @Test public void test() { testGeneratedHsail(); } }