Mercurial > hg > truffle
view graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/nodes/arithmetic/IntegerExactArithmeticSplitNode.java @ 13908:8f3cd93813f1
Use branch probability for emitting conditional jump.
author | Roland Schatz <roland.schatz@oracle.com> |
---|---|
date | Fri, 07 Feb 2014 15:20:59 +0100 |
parents | 6fc05ad86490 |
children | 1cf373d2b415 |
line wrap: on
line source
/* * Copyright (c) 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.truffle.nodes.arithmetic; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.gen.*; import com.oracle.graal.compiler.target.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; public abstract class IntegerExactArithmeticSplitNode extends ControlSplitNode implements LIRGenLowerable { @Successor private AbstractBeginNode overflowSuccessor; @Successor private AbstractBeginNode next; @Input private ValueNode x; @Input private ValueNode y; public IntegerExactArithmeticSplitNode(Stamp stamp, ValueNode x, ValueNode y, AbstractBeginNode next, AbstractBeginNode overflowSuccessor) { super(stamp); this.x = x; this.y = y; this.overflowSuccessor = overflowSuccessor; this.next = next; } @Override public double probability(AbstractBeginNode successor) { return successor == next ? 1 : 0; } @Override public void setProbability(AbstractBeginNode successor, double value) { assert probability(successor) == value; } public AbstractBeginNode getNext() { return next; } public AbstractBeginNode getOverflowSuccessor() { return overflowSuccessor; } public ValueNode getX() { return x; } public ValueNode getY() { return y; } @Override public void generate(LIRGenerator generator) { generator.setResult(this, generateArithmetic(generator)); generator.emitOverflowCheckBranch(generator.getLIRBlock(getOverflowSuccessor()), generator.getLIRBlock(getNext()), probability(getOverflowSuccessor())); } protected abstract Value generateArithmetic(LIRGeneratorTool generator); static void lower(LoweringTool tool, IntegerExactArithmeticNode node) { if (node.asNode().graph().getGuardsStage() == StructuredGraph.GuardsStage.FIXED_DEOPTS) { FloatingNode floatingNode = (FloatingNode) node; FixedWithNextNode previous = tool.lastFixedNode(); FixedNode next = previous.next(); previous.setNext(null); DeoptimizeNode deopt = floatingNode.graph().add(new DeoptimizeNode(DeoptimizationAction.InvalidateReprofile, DeoptimizationReason.ArithmeticException)); BeginNode normalBegin = floatingNode.graph().add(new BeginNode()); normalBegin.setNext(next); IntegerExactArithmeticSplitNode split = node.createSplit(normalBegin, BeginNode.begin(deopt)); previous.setNext(split); floatingNode.replaceAndDelete(split); } } }