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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/LoadExceptionObjectSnippets.java @ 9015:92d2bedb5dfc

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Change of Snippet template and instantiation process
author Christian Wimmer <christian.wimmer@oracle.com>
date Thu, 11 Apr 2013 14:22:03 -0700
parents 3d2c2b68fe93
children 659bb6cf930c
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.replacements;
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24
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25 import static com.oracle.graal.hotspot.replacements.HotSpotSnippetUtils.*;
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26 import static com.oracle.graal.nodes.extended.UnsafeCastNode.*;
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27 import static com.oracle.graal.replacements.SnippetTemplate.*;
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28
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29 import com.oracle.graal.api.code.*;
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30 import com.oracle.graal.nodes.java.*;
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31 import com.oracle.graal.nodes.spi.*;
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32 import com.oracle.graal.nodes.type.*;
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33 import com.oracle.graal.replacements.*;
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34 import com.oracle.graal.replacements.SnippetTemplate.AbstractTemplates;
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35 import com.oracle.graal.replacements.SnippetTemplate.Arguments;
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36 import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo;
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37 import com.oracle.graal.word.*;
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38
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39 /**
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40 * Snippet for loading the exception object at the start of an exception dispatcher.
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41 */
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42 public class LoadExceptionObjectSnippets implements Snippets {
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43
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44 @Snippet
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45 public static Object loadException() {
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46 Word thread = thread();
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47 Object exception = readExceptionOop(thread);
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48 writeExceptionOop(thread, null);
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49 writeExceptionPc(thread, Word.zero());
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50 return unsafeCast(exception, StampFactory.forNodeIntrinsic());
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51 }
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52
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53 public static class Templates extends AbstractTemplates {
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54
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55 private final SnippetInfo loadException = snippet(LoadExceptionObjectSnippets.class, "loadException");
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56
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57 public Templates(CodeCacheProvider runtime, Replacements replacements, TargetDescription target) {
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58 super(runtime, replacements, target);
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59 }
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60
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61 public void lower(LoadExceptionObjectNode loadExceptionObject) {
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62 Arguments args = new Arguments(loadException);
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63 template(args).instantiate(runtime, loadExceptionObject, DEFAULT_REPLACER, args);
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64 }
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65 }
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66 }