Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/controlflow/SLFunctionBodyNode.java @ 13931:ce73694346b2
minor assembly tweaks
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Tue, 11 Feb 2014 10:37:28 -0800 |
parents | afd6fa5e8229 |
children | a08b8694f556 |
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/* * Copyright (c) 2012, 2014, 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.controlflow; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; import com.oracle.truffle.api.utilities.*; import com.oracle.truffle.sl.nodes.*; import com.oracle.truffle.sl.runtime.*; /** * The body of a user-defined SL function. This is the node references by a {@link SLRootNode} for * user-defined functions. It handles the return value of a function: the {@link SLReturnNode return * statement} throws an {@link SLReturnException exception} with the return value. This node catches * the exception. If the method ends without an explicit {@code return}, return the * {@link SLNull#SINGLETON default null value}. */ @NodeInfo(shortName = "body") public final class SLFunctionBodyNode extends SLExpressionNode { /** The body of the function. */ @Child private SLStatementNode bodyNode; /** * Profiling information, collected by the interpreter, capturing whether the function had an * {@link SLReturnNode explicit return statement}. This allows the compiler to generate better * code. */ private final BranchProfile exceptionTaken = new BranchProfile(); private final BranchProfile nullTaken = new BranchProfile(); public SLFunctionBodyNode(SLStatementNode bodyNode) { /* * It is a Truffle requirement to call adoptChild(), which performs all the necessary steps * to add the new child to the node tree. */ this.bodyNode = adoptChild(bodyNode); } @Override public Object executeGeneric(VirtualFrame frame) { try { /* Execute the function body. */ bodyNode.executeVoid(frame); } catch (SLReturnException ex) { /* * In the interpreter, record profiling information that the function has an explicit * return. */ exceptionTaken.enter(); /* The exception transports the actual return value. */ return ex.getResult(); } /* * In the interpreter, record profiling information that the function ends without an * explicit return. */ nullTaken.enter(); /* Return the default null value. */ return SLNull.SINGLETON; } }