Mercurial > hg > graal-compiler
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/AndNode.java @ 15038:5f6603f00e49
minor sign/zero extension tweaks
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
---|---|
date | Tue, 08 Apr 2014 20:13:59 -0700 |
parents | d5a1206e1923 |
children | 844cfee4041a |
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/* * 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.graph.spi.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; @NodeInfo(shortName = "&") public final class AndNode extends BitLogicNode implements Canonicalizable, NarrowableArithmeticNode { public AndNode(Stamp stamp, ValueNode x, ValueNode y) { super(stamp, x, y); } @Override public boolean inferStamp() { return updateStamp(StampTool.and(x().stamp(), y().stamp())); } @Override public Constant evalConst(Constant... inputs) { assert inputs.length == 2; return Constant.forPrimitiveInt(PrimitiveStamp.getBits(stamp()), inputs[0].asLong() & inputs[1].asLong()); } @Override public Node canonical(CanonicalizerTool tool) { if (x() == y()) { return x(); } if (x().isConstant() && !y().isConstant()) { return graph().unique(new AndNode(stamp(), y(), x())); } if (x().isConstant()) { return ConstantNode.forPrimitive(stamp(), evalConst(x().asConstant(), y().asConstant()), graph()); } else if (y().isConstant()) { long rawY = y().asConstant().asLong(); long mask = IntegerStamp.defaultMask(PrimitiveStamp.getBits(stamp())); if ((rawY & mask) == mask) { return x(); } if ((rawY & mask) == 0) { return ConstantNode.forIntegerStamp(stamp(), 0, graph()); } if (x() instanceof SignExtendNode) { SignExtendNode ext = (SignExtendNode) x(); if (rawY == ((1L << ext.getInputBits()) - 1)) { ValueNode result = graph().unique(new ZeroExtendNode(ext.getInput(), ext.getResultBits())); return result; } } if (x().stamp() instanceof IntegerStamp) { IntegerStamp xStamp = (IntegerStamp) x().stamp(); if (((xStamp.upMask() | xStamp.downMask()) & ~rawY) == 0) { // No bits are set which are outside the mask, so the mask will have no effect. return x(); } } return BinaryNode.reassociate(this, ValueNode.isConstantPredicate()); } return this; } @Override public void generate(NodeLIRBuilderTool gen) { gen.setResult(this, gen.getLIRGeneratorTool().emitAnd(gen.operand(x()), gen.operand(y()))); } @Override public boolean generate(MemoryArithmeticLIRLowerer gen, Access access) { Value result = gen.emitAndMemory(x(), y(), access); if (result != null) { gen.setResult(this, result); } return result != null; } }