1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package jdk.test.lib.jittester.factories;
  25 
  26 import java.util.ArrayList;
  27 import jdk.test.lib.jittester.IRNode;
  28 import jdk.test.lib.jittester.LocalVariable;
  29 import jdk.test.lib.jittester.ProductionFailedException;
  30 import jdk.test.lib.jittester.Symbol;
  31 import jdk.test.lib.jittester.SymbolTable;
  32 import jdk.test.lib.jittester.Type;
  33 import jdk.test.lib.jittester.VariableInfo;
  34 import jdk.test.lib.jittester.utils.PseudoRandom;
  35 
  36 class LocalVariableFactory extends Factory {
  37     private final Type type;
  38     private final int flags;
  39 
  40     LocalVariableFactory(Type type, int flags) {
  41         this.type = type;
  42         this.flags = flags;
  43     }
  44 
  45     @Override
  46     public IRNode produce() throws ProductionFailedException {
  47         // Get the variables of the requested type from SymbolTable
  48         ArrayList<Symbol> allVariables = new ArrayList<>(SymbolTable.get(type, VariableInfo.class));
  49         if (!allVariables.isEmpty()) {
  50             PseudoRandom.shuffle(allVariables);
  51             for (Symbol symbol : allVariables) {
  52                 VariableInfo varInfo = (VariableInfo) symbol;
  53                 if ((varInfo.flags & VariableInfo.FINAL) == (flags & VariableInfo.FINAL)
  54                         && (varInfo.flags & VariableInfo.INITIALIZED) == (flags & VariableInfo.INITIALIZED)
  55                         && (varInfo.flags & VariableInfo.LOCAL) > 0) {
  56                     return new LocalVariable(varInfo);
  57                 }
  58             }
  59         }
  60         throw new ProductionFailedException();
  61     }
  62 }