Mercurial > hg > graal-compiler
view graal/com.oracle.graal.api.directives.test/src/com/oracle/graal/api/directives/test/ProbabilityDirectiveTest.java @ 19046:2358c0e65b9e
Unit tests for GraalDirectives API.
author | Roland Schatz <roland.schatz@oracle.com> |
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date | Thu, 29 Jan 2015 16:49:03 +0100 |
parents | |
children | 61d3cb8e1280 |
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/* * Copyright (c) 2015, 2015, 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.api.directives.test; import org.junit.*; import com.oracle.graal.api.directives.*; import com.oracle.graal.compiler.test.*; import com.oracle.graal.graph.iterators.*; import com.oracle.graal.nodes.*; public class ProbabilityDirectiveTest extends GraalCompilerTest { public static int branchProbabilitySnippet(int arg) { if (GraalDirectives.injectBranchProbability(0.125, arg > 0)) { GraalDirectives.controlFlowAnchor(); // prevent removal of the if return 1; } else { GraalDirectives.controlFlowAnchor(); // prevent removal of the if return 2; } } @Test public void testBranchProbability() { test("branchProbabilitySnippet", 5); } @Override protected boolean checkLowTierGraph(StructuredGraph graph) { NodeIterable<IfNode> ifNodes = graph.getNodes(IfNode.class); Assert.assertEquals("IfNode count", 1, ifNodes.count()); IfNode ifNode = ifNodes.first(); AbstractBeginNode trueSuccessor = ifNode.trueSuccessor(); Assert.assertEquals("branch probability of " + ifNode, 0.125, ifNode.probability(trueSuccessor), 0); return true; } }