| /* |
| * 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 org.graalvm.compiler.hotspot.nodes.type; |
| |
| import org.graalvm.compiler.core.common.type.AbstractPointerStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| |
| import jdk.vm.ci.hotspot.HotSpotMemoryAccessProvider; |
| import jdk.vm.ci.hotspot.HotSpotMetaspaceConstant; |
| import jdk.vm.ci.meta.Constant; |
| import jdk.vm.ci.meta.JavaConstant; |
| import jdk.vm.ci.meta.MemoryAccessProvider; |
| import jdk.vm.ci.meta.MetaAccessProvider; |
| |
| 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 boolean isCompatible(Constant constant) { |
| if (constant instanceof HotSpotMetaspaceConstant) { |
| return ((HotSpotMetaspaceConstant) constant).asResolvedJavaMethod() != null; |
| } else { |
| return super.isCompatible(constant); |
| } |
| } |
| |
| @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(); |
| } |
| } |