| /* |
| * Copyright (c) 2011, 2016, 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.spi; |
| |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.memory.address.AddressNode; |
| |
| import jdk.vm.ci.meta.JavaKind; |
| |
| /** |
| * Provides a capability for replacing a higher node with one or more lower level nodes. |
| */ |
| public interface LoweringProvider { |
| |
| void lower(Node n, LoweringTool tool); |
| |
| /** |
| * Reconstructs the array index from an address node that was created as a lowering of an |
| * indexed access to an array. |
| * |
| * @param elementKind the {@link JavaKind} of the array elements |
| * @param address an {@link AddressNode} pointing to an element in an array |
| * @return a node that gives the index of the element |
| */ |
| ValueNode reconstructArrayIndex(JavaKind elementKind, AddressNode address); |
| |
| /** |
| * Indicates the smallest width for comparing an integer value on the target platform. |
| */ |
| default Integer smallestCompareWidth() { |
| // most platforms only support 32 and 64 bit compares |
| return 32; |
| } |
| } |