Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/LeftShiftNode.java @ 19526:8fc336a04d77
Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 20 Feb 2015 22:22:55 +0100 |
parents | 61d3cb8e1280 |
children | 48c1ebd24120 |
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/* * Copyright (c) 2011, 2015, 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.compiler.common.type.*; import com.oracle.graal.compiler.common.type.ArithmeticOpTable.ShiftOp.Shl; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.lir.gen.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; @NodeInfo(shortName = "<<") public final class LeftShiftNode extends ShiftNode<Shl> { public static final NodeClass<LeftShiftNode> TYPE = NodeClass.create(LeftShiftNode.class); public LeftShiftNode(ValueNode x, ValueNode y) { super(TYPE, ArithmeticOpTable::getShl, x, y); } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) { ValueNode ret = super.canonical(tool, forX, forY); if (ret != this) { return ret; } if (forY.isConstant()) { int amount = forY.asJavaConstant().asInt(); int originalAmout = amount; int mask = getShiftAmountMask(); amount &= mask; if (amount == 0) { return forX; } if (forX instanceof ShiftNode) { ShiftNode<?> other = (ShiftNode<?>) forX; if (other.getY().isConstant()) { int otherAmount = other.getY().asJavaConstant().asInt() & mask; if (other instanceof LeftShiftNode) { int total = amount + otherAmount; if (total != (total & mask)) { return ConstantNode.forIntegerKind(getKind(), 0); } return new LeftShiftNode(other.getX(), ConstantNode.forInt(total)); } else if ((other instanceof RightShiftNode || other instanceof UnsignedRightShiftNode) && otherAmount == amount) { if (getKind() == Kind.Long) { return new AndNode(other.getX(), ConstantNode.forLong(-1L << amount)); } else { assert getKind() == Kind.Int; return new AndNode(other.getX(), ConstantNode.forInt(-1 << amount)); } } } } if (originalAmout != amount) { return new LeftShiftNode(forX, ConstantNode.forInt(amount)); } } return this; } @Override public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) { builder.setResult(this, gen.emitShl(builder.operand(getX()), builder.operand(getY()))); } }