Mercurial > hg > graal-compiler
diff graal/com.oracle.max.cri/src/com/sun/cri/ci/CiRegisterValue.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
parents | |
children | bc8527f3071c |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.max.cri/src/com/sun/cri/ci/CiRegisterValue.java Sat Dec 17 19:59:18 2011 +0100 @@ -0,0 +1,72 @@ +/* + * Copyright (c) 2009, 2011, 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 com.sun.cri.ci; + +/** + * Denotes a register that stores a value of a fixed kind. There is exactly one (canonical) instance of {@code + * CiRegisterValue} for each ({@link CiRegister}, {@link CiKind}) pair. Use {@link CiRegister#asValue(CiKind)} to + * retrieve the canonical {@link CiRegisterValue} instance for a given (register,kind) pair. + */ +public final class CiRegisterValue extends CiValue { + + /** + * The register. + */ + public final CiRegister reg; + + /** + * Should only be called from {@link CiRegister#CiRegister} to ensure canonicalization. + */ + CiRegisterValue(CiKind kind, CiRegister register) { + super(kind); + this.reg = register; + } + + @Override + public int hashCode() { + return kind.ordinal() ^ reg.number; + } + + @Override + public boolean equals(Object o) { + return o == this; + } + + @Override + public boolean equalsIgnoringKind(CiValue other) { + if (other instanceof CiRegisterValue) { + return ((CiRegisterValue) other).reg == reg; + } + return false; + } + + @Override + public String name() { + return reg.name; + } + + @Override + public CiRegister asRegister() { + return reg; + } +}