Mercurial > hg > truffle
view graal/com.oracle.graal.nodes.test/src/com/oracle/graal/nodes/test/LoopPhiCanonicalizerTest.java @ 18535:11f353f259ae
conditional elimination phase during partial evaluation
author | Lukas Stadler <lukas.stadler@oracle.com> |
---|---|
date | Wed, 26 Nov 2014 11:10:26 -0800 |
parents | 1668de777c42 |
children | 8ab925a6f724 |
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/* * Copyright (c) 2013, 2014, 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.nodes.test; import org.junit.*; import com.oracle.graal.compiler.test.*; import com.oracle.graal.graph.iterators.*; import com.oracle.graal.nodes.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.phases.tiers.*; public class LoopPhiCanonicalizerTest extends GraalCompilerTest { private static int[] array = new int[1000]; @BeforeClass public static void before() { for (int i = 0; i < array.length; i++) { array[i] = i; } } public static long loopSnippet() { int a = 0; int b = 0; int c = 0; int d = 0; long sum = 0; while (d < 1000) { sum += array[a++] + array[b++] + array[c++] + array[d++]; } return sum; } @Test public void test() { StructuredGraph graph = parseEager("loopSnippet"); NodePredicate loopPhis = node -> node instanceof PhiNode && ((PhiNode) node).merge() instanceof LoopBeginNode; PhaseContext context = new PhaseContext(getProviders(), null); Assert.assertEquals(5, graph.getNodes().filter(loopPhis).count()); new CanonicalizerPhase(false).apply(graph, context); Assert.assertEquals(2, graph.getNodes().filter(loopPhis).count()); test("loopSnippet"); } }