/*
 * Copyright (c) 2014, 2018, 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 org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
import org.graalvm.compiler.lir.LIRInstruction;
import org.graalvm.compiler.lir.ValueProcedure;

import jdk.vm.ci.meta.Value;

Represents a usage of a constant.
/** * Represents a usage of a constant. */
class UseEntry { private final AbstractBlockBase<?> block; private final LIRInstruction instruction; private final Value value; UseEntry(AbstractBlockBase<?> block, LIRInstruction instruction, Value value) { this.block = block; this.instruction = instruction; this.value = value; } public LIRInstruction getInstruction() { return instruction; } public AbstractBlockBase<?> getBlock() { return block; } public void setValue(Value newValue) { replaceValue(instruction, value, newValue); } private static void replaceValue(LIRInstruction op, Value oldValue, Value newValue) { ValueProcedure proc = (value, mode, flags) -> value.identityEquals(oldValue) ? newValue : value; op.forEachAlive(proc); op.forEachInput(proc); op.forEachOutput(proc); op.forEachTemp(proc); op.forEachState(proc); } public Value getValue() { return value; } @Override public String toString() { return "Use[" + getValue() + ":" + instruction + ":" + block + "]"; } }