Mercurial > hg > graal-jvmci-8
view graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/ir/IntegerRem.java @ 3519:16cee060c446
added NodeInfo annotation
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 09 Aug 2011 14:43:41 +0200 |
parents | 9b59afa78775 |
children | 3e21ab23406b |
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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.max.graal.compiler.ir; import com.oracle.max.graal.compiler.phases.CanonicalizerPhase.*; import com.oracle.max.graal.graph.*; import com.sun.cri.bytecode.*; import com.sun.cri.ci.*; @NodeInfo(shortName = "%") public final class IntegerRem extends IntegerArithmeticNode { private static final IntegerRemCanonicalizerOp CANONICALIZER = new IntegerRemCanonicalizerOp(); public IntegerRem(CiKind kind, Value x, Value y, Graph graph) { super(kind, kind == CiKind.Int ? Bytecodes.IREM : Bytecodes.LREM, x, y, graph); } @SuppressWarnings("unchecked") @Override public <T extends Op> T lookup(Class<T> clazz) { if (clazz == CanonicalizerOp.class) { return (T) CANONICALIZER; } return super.lookup(clazz); } private static class IntegerRemCanonicalizerOp implements CanonicalizerOp { @Override public Node canonical(Node node, NotifyReProcess reProcess) { IntegerRem rem = (IntegerRem) node; Value x = rem.x(); Value y = rem.y(); CiKind kind = rem.kind; Graph graph = rem.graph(); if (x.isConstant() && y.isConstant()) { long yConst = y.asConstant().asLong(); if (yConst == 0) { return rem; // this will trap, can not canonicalize } if (kind == CiKind.Int) { return Constant.forInt(x.asConstant().asInt() % (int) yConst, graph); } else { assert kind == CiKind.Long; return Constant.forLong(x.asConstant().asLong() % yConst, graph); } } else if (y.isConstant()) { long c = y.asConstant().asLong(); if (c == 1) { return x; } } return rem; } } }