Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/WhileNode.java @ 13745:978587c91373
Merge
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 23 Jan 2014 16:35:57 -0800 |
parents | d4c6dd07be76 |
children |
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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.truffle.sl.nodes; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.utilities.*; public class WhileNode extends StatementNode { @Child private ConditionNode condition; @Child private StatementNode body; private final BreakException breakTarget; private final ContinueException continueTarget; private final BranchProfile continueMismatch = new BranchProfile(); private final BranchProfile continueMatch = new BranchProfile(); private final BranchProfile breakMismatch = new BranchProfile(); private final BranchProfile breakMatch = new BranchProfile(); public WhileNode(ConditionNode condition, StatementNode body) { this.condition = adoptChild(condition); this.body = adoptChild(body); this.breakTarget = new BreakException(); this.continueTarget = new ContinueException(); } @Override public void executeVoid(VirtualFrame frame) { try { while (condition.executeCondition(frame)) { try { body.executeVoid(frame); } catch (ContinueException ex) { if (ex != continueTarget) { continueMismatch.enter(); throw ex; } continueMatch.enter(); // Fall through to next loop iteration. } } } catch (BreakException ex) { if (ex != breakTarget) { breakMismatch.enter(); throw ex; } breakMatch.enter(); // Done executing this loop, exit method to execute statement following the loop. } } }