1 /* 2 * Copyright (c) 2012, 2018, 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 24 25 package org.graalvm.compiler.loop.phases; 26 27 import org.graalvm.compiler.debug.DebugContext; 28 import org.graalvm.compiler.loop.LoopEx; 29 import org.graalvm.compiler.loop.LoopPolicies; 30 import org.graalvm.compiler.loop.LoopsData; 31 import org.graalvm.compiler.nodes.StructuredGraph; 32 import org.graalvm.compiler.nodes.spi.CoreProviders; 33 34 public class LoopPeelingPhase extends LoopPhase<LoopPolicies> { 35 36 public LoopPeelingPhase(LoopPolicies policies) { 37 super(policies); 38 } 39 40 @Override 41 @SuppressWarnings("try") 42 protected void run(StructuredGraph graph, CoreProviders context) { 43 DebugContext debug = graph.getDebug(); 44 if (graph.hasLoops()) { 45 LoopsData data = new LoopsData(graph); 46 try (DebugContext.Scope s = debug.scope("peeling", data.getCFG())) { 47 for (LoopEx loop : data.outerFirst()) { 48 if (getPolicies().shouldPeel(loop, data.getCFG(), context.getMetaAccess())) { 49 debug.log("Peeling %s", loop); 50 LoopTransformations.peel(loop); 51 debug.dump(DebugContext.DETAILED_LEVEL, graph, "Peeling %s", loop); 52 } 53 } 54 data.deleteUnusedNodes(); 55 } catch (Throwable t) { 56 throw debug.handle(t); 57 } 58 } 59 } 60 61 @Override 62 public float codeSizeIncrease() { 63 return 5.0f; 64 } 65 }