Mercurial > hg > graal-compiler
view graal/com.oracle.graal.loop/src/com/oracle/graal/loop/DerivedScaledInductionVariable.java @ 15805:dffc37fa7157
initialize HotSpotVMConfig fields efficiently from C++
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Tue, 20 May 2014 13:46:34 -0700 |
parents | 882f4cb7cfcf |
children | 7fb828b4c32b |
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/* * Copyright (c) 2012, 2012, 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.loop; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; public class DerivedScaledInductionVariable extends InductionVariable { private InductionVariable base; private ValueNode scale; private ValueNode value; public DerivedScaledInductionVariable(LoopEx loop, InductionVariable base, ValueNode scale, ValueNode value) { super(loop); this.base = base; this.scale = scale; this.value = value; } public DerivedScaledInductionVariable(LoopEx loop, InductionVariable base, NegateNode value) { super(loop); this.base = base; this.scale = ConstantNode.forInt(-1, value.graph()); this.value = value; } @Override public StructuredGraph graph() { return base.graph(); } @Override public Direction direction() { Stamp stamp = scale.stamp(); if (stamp instanceof IntegerStamp) { IntegerStamp integerStamp = (IntegerStamp) stamp; if (integerStamp.isStrictlyPositive()) { return base.direction(); } else if (integerStamp.isStrictlyNegative()) { return base.direction().opposite(); } } return null; } @Override public ValueNode valueNode() { return value; } @Override public ValueNode initNode() { return IntegerArithmeticNode.mul(graph(), base.initNode(), scale); } @Override public ValueNode strideNode() { return IntegerArithmeticNode.mul(graph(), base.strideNode(), scale); } @Override public boolean isConstantInit() { return scale.isConstant() && base.isConstantInit(); } @Override public boolean isConstantStride() { return scale.isConstant() && base.isConstantStride(); } @Override public long constantInit() { return base.constantInit() * scale.asConstant().asLong(); } @Override public long constantStride() { return base.constantStride() * scale.asConstant().asLong(); } @Override public ValueNode extremumNode(boolean assumePositiveTripCount, Stamp stamp) { return IntegerArithmeticNode.mul(graph(), base.extremumNode(assumePositiveTripCount, stamp), IntegerConvertNode.convert(scale, stamp)); } @Override public ValueNode exitValueNode() { return IntegerArithmeticNode.mul(graph(), base.exitValueNode(), scale); } @Override public boolean isConstantExtremum() { return scale.isConstant() && base.isConstantExtremum(); } @Override public long constantExtremum() { return base.constantExtremum() * scale.asConstant().asLong(); } }