Mercurial > hg > graal-jvmci-8
diff graal/GraalCompiler/src/com/sun/c1x/ir/Conditional.java @ 2852:c6bdec623ef9
Move TypeCHeck to floating nodes, rename Nodes to aboid using an *Op suffix
author | Gilles Duboscq <gilles.duboscq@oracle.com> |
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date | Tue, 07 Jun 2011 12:10:27 +0200 |
parents | graal/GraalCompiler/src/com/sun/c1x/ir/IfOp.java@14708c03abba |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/GraalCompiler/src/com/sun/c1x/ir/Conditional.java Tue Jun 07 12:10:27 2011 +0200 @@ -0,0 +1,155 @@ +/* + * Copyright (c) 2009, 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.sun.c1x.ir; + +import com.oracle.graal.graph.*; +import com.sun.c1x.debug.*; +import com.sun.c1x.util.*; +import com.sun.cri.bytecode.*; +import com.sun.cri.ci.*; + +/** + * The {@code IfOp} class represents a comparison that yields one of two values. + * Note that these nodes are not built directly from the bytecode but are introduced + * by conditional expression elimination. + */ +public final class Conditional extends Binary { + + private static final int INPUT_COUNT = 2; + private static final int INPUT_TRUE_VALUE = 0; + private static final int INPUT_FALSE_VALUE = 1; + + private static final int SUCCESSOR_COUNT = 0; + + @Override + protected int inputCount() { + return super.inputCount() + INPUT_COUNT; + } + + @Override + protected int successorCount() { + return super.successorCount() + SUCCESSOR_COUNT; + } + + + /** + * The instruction that produces the value if the comparison is true. + */ + public Value trueValue() { + return (Value) inputs().get(super.inputCount() + INPUT_TRUE_VALUE); + } + + public Value setTrueValue(Value n) { + return (Value) inputs().set(super.inputCount() + INPUT_TRUE_VALUE, n); + } + + /** + * The instruction that produces the value if the comparison is false. + */ + public Value falseValue() { + return (Value) inputs().get(super.inputCount() + INPUT_FALSE_VALUE); + } + + public Value setFalseValue(Value n) { + return (Value) inputs().set(super.inputCount() + INPUT_FALSE_VALUE, n); + } + + + Condition condition; + + /** + * Constructs a new IfOp. + * @param x the instruction producing the first value to be compared + * @param condition the condition of the comparison + * @param y the instruction producing the second value to be compared + * @param trueValue the value produced if the condition is true + * @param falseValue the value produced if the condition is false + */ + public Conditional(Value x, Condition condition, Value y, Value trueValue, Value falseValue, Graph graph) { + // TODO: return the appropriate bytecode IF_ICMPEQ, etc + super(trueValue.kind.meet(falseValue.kind), Bytecodes.ILLEGAL, x, y, INPUT_COUNT, SUCCESSOR_COUNT, graph); + this.condition = condition; + setTrueValue(trueValue); + setFalseValue(falseValue); + } + + // for copying + private Conditional(CiKind kind, Condition cond, Graph graph) { + super(kind, Bytecodes.ILLEGAL, null, null, INPUT_COUNT, SUCCESSOR_COUNT, graph); + this.condition = cond; + } + + /** + * Gets the condition of this if operation. + * @return the condition + */ + public Condition condition() { + return condition; + } + + /** + * Checks whether this comparison operator is commutative (i.e. it is either == or !=). + * @return {@code true} if this comparison is commutative + */ + public boolean isCommutative() { + return condition == Condition.EQ || condition == Condition.NE; + } + + @Override + public void accept(ValueVisitor v) { + v.visitIfOp(this); + } + + @Override + public int valueNumber() { + return Util.hash4(condition.hashCode(), x(), y(), trueValue(), falseValue()); + } + + @Override + public boolean valueEqual(Node i) { + if (i instanceof Conditional) { + Conditional o = (Conditional) i; + return opcode == o.opcode && x() == o.x() && y() == o.y() && trueValue() == o.trueValue() && falseValue() == o.falseValue(); + } + return false; + } + + @Override + public void print(LogStream out) { + out.print(x()). + print(' '). + print(condition().operator). + print(' '). + print(y()). + print(" ? "). + print(trueValue()). + print(" : "). + print(falseValue()); + } + + @Override + public Node copy(Graph into) { + Conditional x = new Conditional(kind, condition, into); + return x; + } +}