Mercurial > hg > graal-compiler
view graal/com.oracle.max.graal.nodes/src/com/oracle/graal/nodes/type/StampFactory.java @ 5060:4ed4295ce15f
Update import statements.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 08 Mar 2012 19:11:12 +0100 |
parents | ed559a528128 |
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/* * Copyright (c) 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.oracle.graal.nodes.type; import java.util.*; import com.oracle.max.cri.ci.*; import com.oracle.max.cri.ri.*; public class StampFactory { private static class BasicValueStamp implements Stamp { private final CiKind kind; private final boolean nonNull; private RiResolvedType declaredType; private RiResolvedType exactType; public BasicValueStamp(CiKind kind) { this(kind, false, null, null); } public BasicValueStamp(CiKind kind, boolean nonNull, RiResolvedType declaredType, RiResolvedType exactType) { this.kind = kind; this.nonNull = nonNull; this.declaredType = declaredType; this.exactType = exactType; } @Override public CiKind kind() { return kind; } @Override public boolean nonNull() { return nonNull; } @Override public RiResolvedType declaredType() { return declaredType; } @Override public RiResolvedType exactType() { return exactType; } @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (obj instanceof Stamp) { Stamp other = (Stamp) obj; return kind == other.kind() && nonNull() == other.nonNull() && declaredType() == other.declaredType() && exactType() == other.exactType(); } return false; } @Override public int hashCode() { return kind.hashCode(); } @Override public String toString() { return String.format("%c%s %s %s", kind().typeChar, nonNull ? "!" : "", declaredType == null ? "-" : declaredType.name(), exactType == null ? "-" : exactType.name()); } @Override public boolean alwaysDistinct(Stamp other) { if (other.kind() != kind()) { return true; } else if (kind() != CiKind.Object) { return false; } else if (other.declaredType() == null || declaredType() == null) { // We have no type information for one of the values. return false; } else if (other.nonNull() || nonNull()) { // One of the two values cannot be null. return !other.declaredType().isInterface() && !declaredType().isInterface() && !other.declaredType().isSubtypeOf(declaredType()) && !declaredType().isSubtypeOf(other.declaredType()); } else { // Both values may be null. return false; } } } private static final Stamp[] stampCache = new Stamp[CiKind.values().length]; static { for (CiKind k : CiKind.values()) { stampCache[k.ordinal()] = new BasicValueStamp(k); } } public static Stamp illegal() { return forKind(CiKind.Illegal); } public static Stamp intValue() { return forKind(CiKind.Int); } public static Stamp forKind(CiKind kind) { return stampCache[kind.stackKind().ordinal()]; } public static Stamp exactNonNull(final RiResolvedType type) { // (cwimmer) type can be null for certain Maxine-internal objects such as the static hub. Is this a problem here? assert type == null || type.kind(false) == CiKind.Object; return new BasicValueStamp(CiKind.Object, true, type, type); } public static Stamp forConstant(CiConstant value, RiRuntime runtime) { if (runtime != null && value.kind == CiKind.Object && !value.isNull()) { return exactNonNull(runtime.getTypeOf(value)); } else { return forKind(value.kind.stackKind()); } } public static Stamp objectNonNull() { return new BasicValueStamp(CiKind.Object, true, null, null); } public static Stamp declared(final RiResolvedType type) { assert type != null; assert type.kind(false) == CiKind.Object; return new BasicValueStamp(CiKind.Object, false, type, type.exactType()); } public static Stamp declaredNonNull(final RiResolvedType type) { assert type != null; assert type.kind(false) == CiKind.Object; return new BasicValueStamp(CiKind.Object, true, type, type.exactType()); } public static Stamp or(Collection<? extends StampProvider> values) { if (values.size() == 0) { return illegal(); } else { Iterator< ? extends StampProvider> iterator = values.iterator(); Stamp first = iterator.next().stamp(); if (values.size() == 1) { return first; } boolean nonNull = first.nonNull(); RiResolvedType declaredType = first.declaredType(); RiResolvedType exactType = first.exactType(); while (iterator.hasNext()) { Stamp current = iterator.next().stamp(); assert current.kind() == first.kind() : values + " first=" + first + " current=" + current + " first kind=" + first.kind() + " current kind=" + current.kind(); nonNull &= current.nonNull(); declaredType = orTypes(declaredType, current.declaredType()); if (exactType != current.exactType()) { exactType = null; } } if (nonNull != first.nonNull() || declaredType != first.declaredType() || exactType != first.exactType()) { return new BasicValueStamp(first.kind(), nonNull, declaredType, exactType); } else { return first; } } } private static RiResolvedType orTypes(RiResolvedType a, RiResolvedType b) { if (a == b) { return a; } else if (a == null || b == null) { return null; } else { if (a.isSubtypeOf(b)) { return b; } else if (b.isSubtypeOf(a)) { return a; } else { return null; } } } }