--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/nodes/instrument/SLStandardASTProber.java	Sun Nov 23 16:07:23 2014 -0800
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 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.instrument;
+
+import static com.oracle.truffle.api.instrument.StandardSyntaxTag.*;
+
+import com.oracle.truffle.api.instrument.*;
+import com.oracle.truffle.api.nodes.*;
+import com.oracle.truffle.sl.nodes.*;
+import com.oracle.truffle.sl.nodes.controlflow.*;
+import com.oracle.truffle.sl.nodes.local.*;
+
+/**
+ * A visitor which traverses a completely parsed Simple AST (presumed not yet executed) and enables
+ * instrumentation at a few standard kinds of nodes.
+ */
+public class SLStandardASTProber implements NodeVisitor, ASTProber {
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Instruments and tags all relevant {@link SLStatementNode}s and {@link SLExpressionNode}s.
+     * Currently, only SLStatementNodes that are not SLExpressionNodes are tagged as statements.
+     */
+    public boolean visit(Node node) {
+
+        if (node instanceof SLStatementNode) {
+
+            // We have to distinguish between SLExpressionNode and SLStatementNode since some of the
+            // generated factories have methods that require SLExpressionNodes as parameters. Since
+            // SLExpressionNodes are a subclass of SLStatementNode, we check if something is an
+            // SLExpressionNode first.
+            if (node instanceof SLExpressionNode && node.getParent() != null) {
+                SLExpressionNode expressionNode = (SLExpressionNode) node;
+                if (expressionNode.getSourceSection() != null) {
+                    Probe probe = expressionNode.probe();
+
+                    if (node instanceof SLWriteLocalVariableNode) {
+                        probe.tagAs(STATEMENT, null);
+                        probe.tagAs(ASSIGNMENT, null);
+                    }
+                }
+            } else if (node instanceof SLStatementNode && node.getParent() != null) {
+
+                SLStatementNode statementNode = (SLStatementNode) node;
+                if (statementNode.getSourceSection() != null) {
+                    Probe probe = statementNode.probe();
+                    probe.tagAs(STATEMENT, null);
+
+                    if (node instanceof SLWhileNode) {
+                        probe.tagAs(START_LOOP, null);
+                    }
+                }
+            }
+        }
+        return true;
+    }
+
+    public void probeAST(Node node) {
+        node.accept(this);
+    }
+}