| /* |
| * 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.nodes.graphbuilderconf; |
| |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| |
| public interface LoopExplosionPlugin extends GraphBuilderPlugin { |
| |
| enum LoopExplosionKind { |
| /** |
| * No loop explosion. |
| */ |
| NONE, |
| /** |
| * Fully unroll all loops. The loops must have a known finite number of iterations. If a |
| * loop has multiple loop ends, they are merged so that the subsequent loop iteration is |
| * processed only once. For example, a loop with 4 iterations and 2 loop ends leads to |
| * 1+1+1+1 = 4 copies of the loop body. |
| */ |
| FULL_UNROLL, |
| /** |
| * Fully explode all loops. The loops must have a known finite number of iterations. If a |
| * loop has multiple loop ends, they are not merged so that subsequent loop iterations are |
| * processed multiple times. For example, a loop with 4 iterations and 2 loop ends leads to |
| * 1+2+4+8 = 15 copies of the loop body. |
| */ |
| FULL_EXPLODE, |
| /** |
| * Like {@link #FULL_EXPLODE}, but in addition explosion does not stop at loop exits. Code |
| * after the loop is duplicated for every loop exit of every loop iteration. For example, a |
| * loop with 4 iterations and 2 loop exits leads to 4 * 2 = 8 copies of the code after the |
| * loop. |
| */ |
| FULL_EXPLODE_UNTIL_RETURN, |
| /** |
| * like {@link #FULL_EXPLODE}, but copies of the loop body that have the exact same state |
| * (all local variables have the same value) are merged. This reduces the number of copies |
| * necessary, but can introduce loops again. This kind is useful for bytecode interpreter |
| * loops. |
| */ |
| MERGE_EXPLODE |
| } |
| |
| LoopExplosionKind loopExplosionKind(ResolvedJavaMethod method); |
| } |