Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/OrNode.java @ 11851:04b039d82e86
Simplify constant folding.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Wed, 02 Oct 2013 12:09:51 +0200 |
parents | 2ad1435489d1 |
children | 673f93db4adc |
line wrap: on
line source
/* * 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.calc; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; @NodeInfo(shortName = "|") public final class OrNode extends BitLogicNode implements Canonicalizable { public OrNode(Kind kind, ValueNode x, ValueNode y) { super(kind, x, y); } @Override public boolean inferStamp() { return updateStamp(StampTool.or(x().stamp(), y().stamp())); } @Override public Constant evalConst(Constant... inputs) { assert inputs.length == 2; return Constant.forIntegerKind(kind(), inputs[0].asLong() | inputs[1].asLong(), null); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (x() == y()) { return x(); } if (x().isConstant() && !y().isConstant()) { return graph().unique(new OrNode(kind(), y(), x())); } if (x().isConstant()) { return ConstantNode.forPrimitive(evalConst(x().asConstant(), y().asConstant()), graph()); } else if (y().isConstant()) { if (kind() == Kind.Int) { int c = y().asConstant().asInt(); if (c == -1) { return ConstantNode.forInt(-1, graph()); } if (c == 0) { return x(); } } else { assert kind() == Kind.Long; long c = y().asConstant().asLong(); if (c == -1) { return ConstantNode.forLong(-1, graph()); } if (c == 0) { return x(); } } return BinaryNode.reassociate(this, ValueNode.isConstantPredicate()); } return this; } @Override public void generate(ArithmeticLIRGenerator gen) { gen.setResult(this, gen.emitOr(gen.operand(x()), gen.operand(y()))); } }