| /* |
| * Copyright (c) 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 org.graalvm.compiler.loop.phases; |
| |
| import org.graalvm.compiler.debug.DebugContext; |
| import org.graalvm.compiler.loop.LoopEx; |
| import org.graalvm.compiler.loop.LoopsData; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.calc.BinaryArithmeticNode; |
| import org.graalvm.compiler.phases.Phase; |
| |
| /** |
| * Rearrange {@link BinaryArithmeticNode#isAssociative() associative binary operations} so that |
| * invariant parts of the expression can move outside of the loop. |
| */ |
| public class ReassociateInvariantPhase extends Phase { |
| |
| @SuppressWarnings("try") |
| @Override |
| protected void run(StructuredGraph graph) { |
| int iterations = 0; |
| DebugContext debug = graph.getDebug(); |
| try (DebugContext.Scope s = debug.scope("ReassociateInvariants")) { |
| boolean changed = true; |
| while (changed) { |
| changed = false; |
| final LoopsData dataReassociate = new LoopsData(graph); |
| for (LoopEx loop : dataReassociate.loops()) { |
| changed |= loop.reassociateInvariants(); |
| } |
| dataReassociate.deleteUnusedNodes(); |
| iterations++; |
| debug.dump(DebugContext.VERBOSE_LEVEL, graph, "after iteration %d", iterations); |
| } |
| } catch (Throwable e) { |
| throw debug.handle(e); |
| } |
| } |
| } |
