Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/control/WhileNode.java @ 13792:9e7acc9cad8e
kill unused frame states when loop exits are removed
thanks to Gilles
author | Andreas Woess <andreas.woess@jku.at> |
---|---|
date | Tue, 28 Jan 2014 23:38:22 +0100 |
parents | 0fbee3eb71f0 |
children |
line wrap: on
line source
/* * 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.api.utilities.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.nodes.cast.*; import com.oracle.truffle.ruby.runtime.*; import com.oracle.truffle.ruby.runtime.control.*; /** * Represents a Ruby {@code while} statement. */ @NodeInfo(shortName = "while") public class WhileNode extends RubyNode { @Child protected BooleanCastNode condition; @Child protected RubyNode body; private final BranchProfile breakProfile = new BranchProfile(); private final BranchProfile nextProfile = new BranchProfile(); private final BranchProfile redoProfile = new BranchProfile(); public WhileNode(RubyContext context, SourceSection sourceSection, BooleanCastNode condition, RubyNode body) { super(context, sourceSection); this.condition = adoptChild(condition); this.body = adoptChild(body); } @Override public Object execute(VirtualFrame frame) { outer: while (condition.executeBoolean(frame)) { while (true) { try { body.execute(frame); continue outer; } catch (BreakException e) { breakProfile.enter(); return e.getResult(); } catch (NextException e) { nextProfile.enter(); continue outer; } catch (RedoException e) { redoProfile.enter(); } } } return NilPlaceholder.INSTANCE; } }