--- /dev/null	2016-09-01 15:38:59.076007815 -0400
+++ new/modules/javafx.graphics/src/jslc/java/com/sun/scenario/effect/compiler/model/SymbolTable.java	2016-09-11 10:36:03.408826263 -0400
@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2008, 2013, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.sun.scenario.effect.compiler.model;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ */
+public class SymbolTable {
+
+    private final Map<String, Variable> globalVariableMap = new HashMap<String, Variable>();
+    private final Map<String, Variable> localVariableMap = new HashMap<String, Variable>();
+    private final Set<Function> globalFunctionSet = new HashSet<Function>();
+    private int numSamplers;
+    private int numParams;
+    private boolean global = true;
+
+    public SymbolTable() {
+        declareCoreFunctions();
+    }
+
+    private Variable declareParamVariable(String name, Type type) {
+        return declareVariable(name, type, null, null, -1, null, true);
+    }
+
+    public Variable declareVariable(String name, Type type,
+                                    Qualifier qual)
+    {
+        return declareVariable(name, type, qual, null);
+    }
+
+    public Variable declareVariable(String name, Type type,
+                                    Qualifier qual, Precision precision)
+    {
+        return declareVariable(name, type, qual, precision, -1, null, false);
+    }
+
+    public Variable declareVariable(String name, Type type,
+                                    Qualifier qual, Precision precision,
+                                    int arraySize, Object constValue)
+    {
+        return declareVariable(name, type, qual, precision,
+                               arraySize, constValue, false);
+    }
+
+    public Variable declareVariable(String name, Type type,
+                                    Qualifier qual, Precision precision,
+                                    int arraySize, Object constValue,
+                                    boolean isParam)
+    {
+        Map<String, Variable> vars = getVariablesForScope();
+        Variable v = vars.get(name);
+        if (v != null) {
+            throw new RuntimeException("Variable '" + name + "' already declared");
+        }
+
+        if (arraySize == 0) {
+            throw new RuntimeException("Array size cannot be zero");
+        }
+
+        int reg = -1;
+        if (qual == Qualifier.PARAM) {
+            if (!global) {
+                throw new RuntimeException("Param variable can only be declared in global scope");
+            }
+            if (type.getBaseType() == BaseType.SAMPLER) {
+                reg = numSamplers;
+                numSamplers++;
+            } else {
+                reg = numParams;
+                if (arraySize > 0) {
+                    numParams += arraySize;
+                } else {
+                    numParams++;
+                }
+            }
+        }
+
+        v = new Variable(name, type, qual, precision,
+                         reg, arraySize, constValue, isParam);
+        vars.put(name, v);
+        return v;
+    }
+
+    public Function declareFunction(String name, Type returnType, List<Param> params) {
+        Function f = new Function(name, returnType, params);
+        if (isFunctionDeclared(f)) {
+            throw new RuntimeException("Function '" + name + "' already declared");
+        }
+        if (name.equals("main") && (params == null || params.isEmpty())) {
+            if (localVariableMap.isEmpty()) {
+                // core variables are implicitly declared for main() only
+                for (Variable v : CoreSymbols.getAllVariables()) {
+                    localVariableMap.put(v.getName(), v);
+                }
+            }
+        }
+        if (params != null) {
+            // only declare parameters for non-core functions so that they
+            // are visible in the function's scope (we skip this step for
+            // core functions because the way the code is currently set up,
+            // we'd end up declaring core function parameters in global scope;
+            // we should clean this up later)
+            for (Param param : params) {
+                declareParamVariable(param.getName(), param.getType());
+            }
+        }
+        declareUserFunction(f);
+        return f;
+    }
+
+    public void enterFrame() {
+        global = false;
+        localVariableMap.clear();
+    }
+
+    public void exitFrame() {
+        global = true;
+    }
+
+    private void declareCoreFunctions() {
+        globalFunctionSet.addAll(CoreSymbols.getAllFunctions());
+    }
+
+    public Map<String, Variable> getGlobalVariables() {
+        return globalVariableMap;
+    }
+
+    private boolean isFunctionDeclared(Function func) {
+       return globalFunctionSet.contains(func);
+    }
+
+    private void declareUserFunction(Function func) {
+        globalFunctionSet.add(func);
+    }
+
+    public Function getFunctionForSignature(String name, List<Type> ptypes) {
+        return getFunctionForSignature(globalFunctionSet, name, ptypes);
+    }
+
+    static Function getFunctionForSignature(Set<Function> funcs,
+                                            String name,
+                                            List<Type> ptypes)
+    {
+        for (Function f : funcs) {
+            List<Param> params = f.getParams();
+            if (name.equals(f.getName()) && params.size() == ptypes.size()) {
+                boolean match = true;
+                for (int i = 0; i < params.size(); i++) {
+                    if (params.get(i).getType() != ptypes.get(i)) {
+                        match = false;
+                        break;
+                    }
+                }
+                if (match) {
+                    return f;
+                }
+            }
+        }
+        return null;
+    }
+
+    public Map<String, Variable> getVariablesForScope() {
+        if (global) {
+            return globalVariableMap;
+        } else {
+            return localVariableMap;
+        }
+    }
+
+    public int getNumSamplers() {
+        return numSamplers;
+    }
+}