Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.ruby.nodes/src/com/oracle/truffle/ruby/nodes/call/ProcOrNullNode.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.call; import com.oracle.truffle.api.*; import com.oracle.truffle.api.dsl.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.ruby.nodes.*; import com.oracle.truffle.ruby.runtime.*; import com.oracle.truffle.ruby.runtime.core.*; /** * Wraps some node that will produce either a {@link RubyProc} or a {@link NilPlaceholder} and * returns {@code null} in case of the latter. Used in parts of the dispatch chain. */ @NodeInfo(shortName = "proc-or-null") @NodeChild(value = "child", type = RubyNode.class) public abstract class ProcOrNullNode extends RubyNode { public ProcOrNullNode(RubyContext context, SourceSection sourceSection) { super(context, sourceSection); } public ProcOrNullNode(ProcOrNullNode prev) { super(prev); } @Specialization public Object doNil(@SuppressWarnings("unused") NilPlaceholder nil) { return null; } @Specialization public Object doProc(RubyProc proc) { return proc; } @Override public RubyProc executeRubyProc(VirtualFrame frame) { final Object proc = execute(frame); // The standard asRubyProc test doesn't allow for null assert proc == null || RubyTypesGen.RUBYTYPES.isRubyProc(proc); return (RubyProc) proc; } }