Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/PartialEvaluatorCanonicalizer.java @ 18253:edb88f5425e6
switch to using use .equals() instead of == when comparing RegisterCaterory objects for equality
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 05 Nov 2014 12:23:57 +0100 |
parents | 9619ba4daf4c |
children | fe77c26ccde6 |
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/* * Copyright (c) 2013, 2014, 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.truffle; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.Node; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.phases.common.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.nodes.Node.Child; final class PartialEvaluatorCanonicalizer extends CanonicalizerPhase.CustomCanonicalizer { private final MetaAccessProvider metaAccess; private final ConstantReflectionProvider constantReflection; PartialEvaluatorCanonicalizer(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) { this.metaAccess = metaAccess; this.constantReflection = constantReflection; } @Override public Node canonicalize(Node node) { if (node instanceof LoadFieldNode) { return canonicalizeLoadField((LoadFieldNode) node); } else if (node instanceof LoadIndexedNode) { return canonicalizeLoadIndex((LoadIndexedNode) node); } return node; } private Node canonicalizeLoadField(LoadFieldNode loadFieldNode) { if (!loadFieldNode.isStatic() && loadFieldNode.object().isConstant() && !loadFieldNode.object().isNullConstant()) { if (loadFieldNode.field().isFinal() || (loadFieldNode.getKind() == Kind.Object && loadFieldNode.field().getAnnotation(Child.class) != null) || loadFieldNode.field().getAnnotation(CompilerDirectives.CompilationFinal.class) != null) { JavaConstant constant = loadFieldNode.field().readValue(loadFieldNode.object().asJavaConstant()); assert verifyFieldValue(loadFieldNode.field(), constant); return ConstantNode.forConstant(constant, metaAccess); } } return loadFieldNode; } private Node canonicalizeLoadIndex(LoadIndexedNode loadIndexedNode) { if (loadIndexedNode.array().isConstant() && loadIndexedNode.index().isConstant()) { int index = loadIndexedNode.index().asJavaConstant().asInt(); JavaConstant constant = constantReflection.readArrayElement(loadIndexedNode.array().asJavaConstant(), index); if (constant != null) { return ConstantNode.forConstant(constant, metaAccess); } } return loadIndexedNode; } private boolean verifyFieldValue(ResolvedJavaField field, JavaConstant constant) { assert field.getAnnotation(Child.class) == null || constant.isNull() || metaAccess.lookupJavaType(com.oracle.truffle.api.nodes.Node.class).isAssignableFrom(metaAccess.lookupJavaType(constant)) : "@Child field value must be a Node: " + field + ", but was: " + constant; return true; } }