Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/UnsignedDivNode.java @ 11579:ae619d70bf4b
Rename LoweringType to GuardsPhase and make it an attribute of StructuredGraphs
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 10 Sep 2013 11:15:15 +0200 |
parents | ef6915cf1e59 |
children | 9a747d8e0d0f |
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/* * Copyright (c) 2011, 2013, 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.code.*; 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 class UnsignedDivNode extends FixedBinaryNode implements Canonicalizable, Lowerable, LIRLowerable { public UnsignedDivNode(Kind kind, ValueNode x, ValueNode y) { super(kind, x, y); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (x().isConstant() && y().isConstant()) { long yConst = y().asConstant().asLong(); if (yConst == 0) { return this; // this will trap, cannot canonicalize } if (kind() == Kind.Int) { return ConstantNode.forInt(UnsignedMath.divide(x().asConstant().asInt(), (int) yConst), graph()); } else { assert kind() == Kind.Long; return ConstantNode.forLong(UnsignedMath.divide(x().asConstant().asLong(), yConst), graph()); } } else if (y().isConstant()) { long c = y().asConstant().asLong(); if (c == 1) { return x(); } if (CodeUtil.isPowerOf2(c)) { return graph().unique(new UnsignedRightShiftNode(kind(), x(), ConstantNode.forInt(CodeUtil.log2(c), graph()))); } } return this; } @Override public void lower(LoweringTool tool) { tool.getRuntime().lower(this, tool); } @Override public void generate(LIRGeneratorTool gen) { gen.setResult(this, gen.emitUDiv(gen.operand(x()), gen.operand(y()), this)); } @Override public boolean canDeoptimize() { return !(y().stamp() instanceof IntegerStamp) || ((IntegerStamp) y().stamp()).contains(0); } }