Mercurial > hg > graal-jvmci-8
diff graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/TopStamp.java @ 5820:547587296886
Make ReadEliminationPhase support phis (eliminates read when the last access is a memeory phi of writes, recursively)
Add a TopStamp (identity element for meet) and use it to create kind-less phis that later get a non-top phi by infering thir stamp thanks to inputs
ignore binary graph files
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 12 Jul 2012 18:58:36 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/type/TopStamp.java Thu Jul 12 18:58:36 2012 +0200 @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2012, 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.oracle.graal.nodes.type; + + +public final class TopStamp extends Stamp { + + TopStamp() { + super(null); + } + + @Override + public boolean alwaysDistinct(Stamp other) { + return false; + } + + @Override + public Stamp meet(Stamp other) { + return other; + } + +}