hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/alloc/OutOfRegistersException.java

/*
 * Copyright (c) 2015, 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.alloc;

import static org.graalvm.compiler.core.common.GraalOptions.RegisterPressure;
import static org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig.ALL_REGISTERS;

import org.graalvm.compiler.lir.BailoutAndRestartBackendException;
import org.graalvm.compiler.lir.phases.LIRSuites;
import org.graalvm.compiler.options.OptionValue;
import org.graalvm.compiler.options.OptionValue.OverrideScope;

/**
 * Thrown if the register allocator runs out of registers. This should never happen in normal mode.
 */
public final class OutOfRegistersException extends BailoutAndRestartBackendException {

    private static final long serialVersionUID = -3479786650143432195L;

    private final String description;

    public OutOfRegistersException(String msg) {
        super(msg);
        this.description = "";
    }

    public OutOfRegistersException(Throwable cause, String msg) {
        super(cause, msg);
        this.description = "";
    }

    public OutOfRegistersException(String msg, String description) {
        super(msg);
        this.description = description;
    }

    public OutOfRegistersException(Throwable cause, String msg, String description) {
        super(cause, msg);
        this.description = description;
    }

    public String getDescription() {
        return description;
    }

    @Override
    public boolean shouldRestart() {
        return RegisterPressure.getValue() != null && !RegisterPressure.getValue().equals(ALL_REGISTERS);
    }

    @Override
    public OverrideScope getOverrideScope() {
        return OptionValue.override(RegisterPressure, ALL_REGISTERS);
    }

    @Override
    public LIRSuites updateLIRSuites(LIRSuites lirSuites) {
        return lirSuites;
    }
}