Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/call/SLInvokeNode.java @ 21615:838f005f9aec
handle service filtering that returns an empty result
author | Doug Simon <doug.simon@oracle.com> |
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date | Sun, 31 May 2015 14:30:13 +0200 |
parents | 2170de9acab0 |
children |
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/* * Copyright (c) 2013, 2015, 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.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.api.source.*; import com.oracle.truffle.sl.nodes.*; import com.oracle.truffle.sl.runtime.*; /** * The node for function invocation in SL. Since SL has first class functions, the * {@link SLFunction target function} can be computed by an {@link #functionNode arbitrary * expression}. This node is responsible for evaluating this expression, as well as evaluating the * {@link #argumentNodes arguments}. The actual dispatch is then delegated to a chain of * {@link SLDispatchNode} that form a polymorphic inline cache. */ @NodeInfo(shortName = "invoke") public final class SLInvokeNode extends SLExpressionNode { public static SLInvokeNode create(SourceSection src, SLExpressionNode function, SLExpressionNode[] arguments) { return new SLInvokeNode(src, function, arguments); } @Child private SLExpressionNode functionNode; @Children private final SLExpressionNode[] argumentNodes; @Child private SLDispatchNode dispatchNode; private SLInvokeNode(SourceSection src, SLExpressionNode functionNode, SLExpressionNode[] argumentNodes) { super(src); this.functionNode = functionNode; this.argumentNodes = argumentNodes; this.dispatchNode = SLDispatchNodeGen.create(); } @Override @ExplodeLoop public Object executeGeneric(VirtualFrame frame) { SLFunction function = evaluateFunction(frame); /* * The number of arguments is constant for one invoke node. During compilation, the loop is * unrolled and the execute methods of all arguments are inlined. This is triggered by the * ExplodeLoop annotation on the method. The compiler assertion below illustrates that the * array length is really constant. */ CompilerAsserts.compilationConstant(argumentNodes.length); Object[] argumentValues = new Object[argumentNodes.length]; for (int i = 0; i < argumentNodes.length; i++) { argumentValues[i] = argumentNodes[i].executeGeneric(frame); } return dispatchNode.executeDispatch(frame, function, argumentValues); } private SLFunction evaluateFunction(VirtualFrame frame) { try { /* * The function node must evaluate to a SLFunction value, so we call * function-specialized method. */ return functionNode.executeFunction(frame); } catch (UnexpectedResultException ex) { /* * The function node evaluated to a non-function result. This is a type error in the SL * program. We report it with the same exception that Truffle DSL generated nodes use to * report type errors. */ throw new UnsupportedSpecializationException(this, new Node[]{functionNode}, ex.getResult()); } } }