OutOfRegistersException.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2015, 2015, 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 */
23package org.graalvm.compiler.lir.alloc;
24
25import static org.graalvm.compiler.core.common.GraalOptions.RegisterPressure;
26import static org.graalvm.compiler.core.common.alloc.RegisterAllocationConfig.ALL_REGISTERS;
27
28import org.graalvm.compiler.lir.BailoutAndRestartBackendException;
29import org.graalvm.compiler.lir.phases.LIRSuites;
30import org.graalvm.compiler.options.OptionValue;
31import org.graalvm.compiler.options.OptionValue.OverrideScope;
32
33/**
34 * Thrown if the register allocator runs out of registers. This should never happen in normal mode.
35 */
36public final class OutOfRegistersException extends BailoutAndRestartBackendException {
37
38    private static final long serialVersionUID = -3479786650143432195L;
39
40    private final String description;
41
42    public OutOfRegistersException(String msg) {
43        super(msg);
44        this.description = "";
45    }
46
47    public OutOfRegistersException(Throwable cause, String msg) {
48        super(cause, msg);
49        this.description = "";
50    }
51
52    public OutOfRegistersException(String msg, String description) {
53        super(msg);
54        this.description = description;
55    }
56
57    public OutOfRegistersException(Throwable cause, String msg, String description) {
58        super(cause, msg);
59        this.description = description;
60    }
61
62    public String getDescription() {
63        return description;
64    }
65
66    @Override
67    public boolean shouldRestart() {
68        return RegisterPressure.getValue() != null && !RegisterPressure.getValue().equals(ALL_REGISTERS);
69    }
70
71    @Override
72    public OverrideScope getOverrideScope() {
73        return OptionValue.override(RegisterPressure, ALL_REGISTERS);
74    }
75
76    @Override
77    public LIRSuites updateLIRSuites(LIRSuites lirSuites) {
78        return lirSuites;
79    }
80}
81