| /* |
| * Copyright (c) 2014, 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.lir.constopt; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; |
| import org.graalvm.compiler.lir.LIRInstruction; |
| import org.graalvm.compiler.lir.StandardOp.LoadConstantOp; |
| import org.graalvm.compiler.lir.Variable; |
| |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.Value; |
| |
| /** |
| * Represents def-use tree of a constant. |
| */ |
| class DefUseTree { |
| private final LoadConstantOp instruction; |
| private final AbstractBlockBase<?> block; |
| private final List<UseEntry> uses; |
| |
| DefUseTree(LIRInstruction instruction, AbstractBlockBase<?> block) { |
| assert instruction instanceof LoadConstantOp : "Not a LoadConstantOp: " + instruction; |
| this.instruction = (LoadConstantOp) instruction; |
| this.block = block; |
| this.uses = new ArrayList<>(); |
| } |
| |
| public Variable getVariable() { |
| return (Variable) instruction.getResult(); |
| } |
| |
| public Constant getConstant() { |
| return instruction.getConstant(); |
| } |
| |
| public LIRInstruction getInstruction() { |
| return (LIRInstruction) instruction; |
| } |
| |
| public AbstractBlockBase<?> getBlock() { |
| return block; |
| } |
| |
| @Override |
| public String toString() { |
| return "DefUseTree [" + instruction + "|" + block + "," + uses + "]"; |
| } |
| |
| public void addUsage(AbstractBlockBase<?> b, LIRInstruction inst, Value value) { |
| uses.add(new UseEntry(b, inst, value)); |
| } |
| |
| public int usageCount() { |
| return uses.size(); |
| } |
| |
| public void forEach(Consumer<? super UseEntry> action) { |
| uses.forEach(action); |
| } |
| |
| } |