Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/control/FlipFlopNode.java @ 13792:9e7acc9cad8e
kill unused frame states when loop exits are removed
thanks to Gilles
author | Andreas Woess <andreas.woess@jku.at> |
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date | Tue, 28 Jan 2014 23:38:22 +0100 |
parents | 0fbee3eb71f0 |
children |
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/* * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved. This * code is released under a tri EPL/GPL/LGPL license. You can use it, * redistribute it and/or modify it under the terms of the: * * Eclipse Public License version 1.0 * GNU General Public License version 2 * GNU Lesser General Public License version 2.1 */ package com.oracle.truffle.ruby.nodes.control; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.nodes.cast.*; import com.oracle.truffle.ruby.nodes.methods.locals.*; import com.oracle.truffle.ruby.runtime.*; @NodeInfo(shortName = "flip-flop") public class FlipFlopNode extends RubyNode { @Child protected BooleanCastNode begin; @Child protected BooleanCastNode end; @Child protected FlipFlopStateNode stateNode; private final boolean exclusive; public FlipFlopNode(RubyContext context, SourceSection sourceSection, BooleanCastNode begin, BooleanCastNode end, FlipFlopStateNode stateNode, boolean exclusive) { super(context, sourceSection); this.begin = adoptChild(begin); this.end = adoptChild(end); this.stateNode = adoptChild(stateNode); this.exclusive = exclusive; } @Override public boolean executeBoolean(VirtualFrame frame) { if (exclusive) { if (stateNode.getState(frame)) { if (end.executeBoolean(frame)) { stateNode.setState(frame, false); } return true; } else { final boolean newState = begin.executeBoolean(frame); stateNode.setState(frame, newState); return newState; } } else { if (stateNode.getState(frame)) { if (end.executeBoolean(frame)) { stateNode.setState(frame, false); } return true; } else { if (begin.executeBoolean(frame)) { stateNode.setState(frame, !end.executeBoolean(frame)); return true; } return false; } } } @Override public Object execute(VirtualFrame frame) { return executeBoolean(frame); } }