Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/nodes/type/MethodPointerStamp.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 27 May 2015 00:36:16 +0200 |
parents | 5324104ac4f3 |
children | 0e095e2c24e2 |
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/* * Copyright (c) 2014, 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 com.oracle.graal.hotspot.nodes.type; import com.oracle.jvmci.meta.MemoryAccessProvider; import com.oracle.jvmci.meta.MetaAccessProvider; import com.oracle.jvmci.meta.JavaConstant; import com.oracle.jvmci.meta.Constant; import com.oracle.graal.compiler.common.type.*; import com.oracle.jvmci.hotspot.*; public final class MethodPointerStamp extends MetaspacePointerStamp { private static final MethodPointerStamp METHOD = new MethodPointerStamp(false, false); private static final MethodPointerStamp METHOD_NON_NULL = new MethodPointerStamp(true, false); private static final MethodPointerStamp METHOD_ALWAYS_NULL = new MethodPointerStamp(false, true); public static MethodPointerStamp method() { return METHOD; } public static MethodPointerStamp methodNonNull() { return METHOD_NON_NULL; } private MethodPointerStamp(boolean nonNull, boolean alwaysNull) { super(nonNull, alwaysNull); } @Override protected AbstractPointerStamp copyWith(boolean newNonNull, boolean newAlwaysNull) { if (newNonNull) { assert !newAlwaysNull; return METHOD_NON_NULL; } else if (newAlwaysNull) { return METHOD_ALWAYS_NULL; } else { return METHOD; } } @Override public boolean isCompatible(Stamp otherStamp) { if (this == otherStamp) { return true; } return otherStamp instanceof MethodPointerStamp; } @Override public Stamp constant(Constant c, MetaAccessProvider meta) { if (JavaConstant.NULL_POINTER.equals(c)) { return METHOD_ALWAYS_NULL; } else { assert c instanceof HotSpotMetaspaceConstant; return METHOD_NON_NULL; } } @Override public Constant readConstant(MemoryAccessProvider provider, Constant base, long displacement) { HotSpotMemoryAccessProvider hsProvider = (HotSpotMemoryAccessProvider) provider; return hsProvider.readMethodPointerConstant(base, displacement); } @Override public String toString() { StringBuilder ret = new StringBuilder("Method*"); appendString(ret); return ret.toString(); } }