1 /* 2 * Copyright (c) 2014, 2014, 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 package org.graalvm.compiler.lir.constopt; 24 25 import org.graalvm.compiler.core.common.cfg.AbstractBlockBase; 26 import org.graalvm.compiler.lir.LIRInstruction; 27 import org.graalvm.compiler.lir.ValueProcedure; 28 29 import jdk.vm.ci.meta.Value; 30 31 /** 32 * Represents a usage of a constant. 33 */ 34 class UseEntry { 35 36 private final AbstractBlockBase<?> block; 37 private final LIRInstruction instruction; 38 private final Value value; 39 40 UseEntry(AbstractBlockBase<?> block, LIRInstruction instruction, Value value) { 41 this.block = block; 42 this.instruction = instruction; 43 this.value = value; 44 } 45 46 public LIRInstruction getInstruction() { 47 return instruction; 48 } 49 50 public AbstractBlockBase<?> getBlock() { 51 return block; 52 } 53 54 public void setValue(Value newValue) { 55 replaceValue(instruction, value, newValue); 56 } 57 58 private static void replaceValue(LIRInstruction op, Value oldValue, Value newValue) { 59 ValueProcedure proc = (value, mode, flags) -> value.identityEquals(oldValue) ? newValue : value; 60 op.forEachAlive(proc); 61 op.forEachInput(proc); 62 op.forEachOutput(proc); 63 op.forEachTemp(proc); 64 op.forEachState(proc); 65 } 66 67 public Value getValue() { 68 return value; 69 } 70 71 @Override 72 public String toString() { 73 return "Use[" + getValue() + ":" + instruction + ":" + block + "]"; 74 } 75 76 }