1 /* 2 * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.loop.phases; 24 25 import org.graalvm.compiler.debug.Debug; 26 import org.graalvm.compiler.loop.LoopEx; 27 import org.graalvm.compiler.loop.LoopPolicies; 28 import org.graalvm.compiler.loop.LoopsData; 29 import org.graalvm.compiler.nodes.StructuredGraph; 30 import org.graalvm.compiler.phases.tiers.PhaseContext; 31 32 public class LoopPeelingPhase extends LoopPhase<LoopPolicies> { 33 34 public LoopPeelingPhase(LoopPolicies policies) { 35 super(policies); 36 } 37 38 @Override 39 @SuppressWarnings("try") 40 protected void run(StructuredGraph graph, PhaseContext context) { 41 if (graph.hasLoops()) { 42 LoopsData data = new LoopsData(graph); 43 try (Debug.Scope s = Debug.scope("peeling", data.getCFG())) { 44 for (LoopEx loop : data.outerFirst()) { 45 if (getPolicies().shouldPeel(loop, data.getCFG(), context.getMetaAccess())) { 46 Debug.log("Peeling %s", loop); 47 LoopTransformations.peel(loop); 48 Debug.dump(Debug.INFO_LOG_LEVEL, graph, "Peeling %s", loop); 49 } 50 } 51 data.deleteUnusedNodes(); 52 } catch (Throwable t) { 53 throw Debug.handle(t); 54 } 55 } 56 } 57 58 @Override 59 public float codeSizeIncrease() { 60 return 5.0f; 61 } 62 }