Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/FloatEqualsNode.java @ 15975:0ad889977080
CompareNode.canonicalizeSymmetricConstant can lead to float<->int changes so the right type of node needs to be created depending on the inputs
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 29 May 2014 14:44:43 +0200 |
parents | d5b824a41530 |
children | 66a9286203a2 |
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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.*; import com.oracle.graal.compiler.common.calc.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.util.*; @NodeInfo(shortName = "==") public final class FloatEqualsNode extends CompareNode { /** * Constructs a new floating point equality 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 FloatEqualsNode(ValueNode x, ValueNode y) { super(x, y); assert x.stamp() instanceof FloatStamp && y.stamp() instanceof FloatStamp; assert x.stamp().isCompatible(y.stamp()); } @Override public Condition condition() { return Condition.EQ; } @Override public boolean unorderedIsTrue() { return false; } @Override public TriState evaluate(ConstantReflectionProvider constantReflection, ValueNode forX, ValueNode forY) { if (forX.stamp() instanceof FloatStamp && forY.stamp() instanceof FloatStamp) { FloatStamp xStamp = (FloatStamp) forX.stamp(); FloatStamp yStamp = (FloatStamp) forY.stamp(); if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY) && xStamp.isNonNaN() && yStamp.isNonNaN()) { return TriState.TRUE; } else if (xStamp.alwaysDistinct(yStamp)) { return TriState.FALSE; } } return super.evaluate(constantReflection, forX, forY); } @Override protected CompareNode duplicateModified(ValueNode newX, ValueNode newY) { if (newX.stamp() instanceof FloatStamp && newY.stamp() instanceof FloatStamp) { return new FloatEqualsNode(newX, newY); } else if (newX.stamp() instanceof IntegerStamp && newY.stamp() instanceof IntegerStamp) { return new IntegerEqualsNode(newX, newY); } throw GraalInternalError.shouldNotReachHere(); } }