Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IntegerBelowThanNode.java @ 15961:d5b824a41530
CompareNode refactorings
author | Lukas Stadler <lukas.stadler@oracle.com> |
---|---|
date | Wed, 28 May 2014 17:47:23 +0200 |
parents | 7766f486f5d6 |
children | 0ad889977080 |
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/* * Copyright (c) 2011, 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.api.meta.ProfilingInfo.*; import com.oracle.graal.compiler.common.calc.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.util.*; @NodeInfo(shortName = "|<|") public final class IntegerBelowThanNode extends CompareNode { /** * Constructs a new unsigned integer comparison node. * * @param x the instruction producing the first input to the instruction * @param y the instruction that produces the second input to this instruction */ public IntegerBelowThanNode(ValueNode x, ValueNode y) { super(x, y); assert !x.getKind().isNumericFloat() && x.getKind() != Kind.Object; assert !y.getKind().isNumericFloat() && y.getKind() != Kind.Object; } @Override public Condition condition() { return Condition.BT; } @Override public boolean unorderedIsTrue() { return false; } @Override public TriState evaluate(ConstantReflectionProvider constantReflection, ValueNode forX, ValueNode forY) { if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY)) { return TriState.FALSE; } else if (forX.stamp() instanceof IntegerStamp && forY.stamp() instanceof IntegerStamp) { IntegerStamp xStamp = (IntegerStamp) forX.stamp(); IntegerStamp yStamp = (IntegerStamp) forY.stamp(); if (yStamp.isPositive()) { if (xStamp.isPositive() && xStamp.upperBound() < yStamp.lowerBound()) { return TriState.TRUE; } else if (xStamp.isStrictlyNegative() || xStamp.lowerBound() >= yStamp.upperBound()) { return TriState.FALSE; } } } return super.evaluate(constantReflection, forX, forY); } @Override public Node canonical(CanonicalizerTool tool) { Node result = super.canonical(tool); if (result != this) { return result; } if (x().isConstant() && x().asConstant().asLong() == 0) { // 0 |<| y is the same as 0 != y return graph().unique(new LogicNegationNode(CompareNode.createCompareNode(graph(), Condition.EQ, x(), y()))); } return this; } @Override protected CompareNode duplicateModified(ValueNode newX, ValueNode newY) { return new IntegerBelowThanNode(newX, newY); } }