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.CastOperator;
  28 import jdk.test.lib.jittester.IRNode;
  29 import jdk.test.lib.jittester.ProductionFailedException;
  30 import jdk.test.lib.jittester.SymbolTable;
  31 import jdk.test.lib.jittester.Type;
  32 import jdk.test.lib.jittester.TypeList;
  33 import jdk.test.lib.jittester.types.TypeKlass;
  34 import jdk.test.lib.jittester.utils.PseudoRandom;
  35 
  36 class CastOperatorFactory extends OperatorFactory {
  37     private final Type resultType;
  38     private final Type ownerClass;
  39 
  40     CastOperatorFactory(long complexityLimit, int operatorLimit, TypeKlass ownerClass,
  41             Type resultType, boolean exceptionSafe, boolean noconsts) {
  42         super(13, complexityLimit, operatorLimit, exceptionSafe, noconsts);
  43         this.resultType = resultType;
  44         this.ownerClass = ownerClass;
  45     }
  46 
  47     @Override
  48     public IRNode produce() throws ProductionFailedException {
  49         ArrayList<Type> argType = new ArrayList<>(TypeList.getAll());
  50         PseudoRandom.shuffle(argType);
  51         for (Type type : argType) {
  52             try {
  53                 ExpressionFactory expressionFactory = new IRNodeBuilder()
  54                         .setComplexityLimit(complexityLimit - 1)
  55                         .setOperatorLimit(operatorLimit - 1)
  56                         .setOwnerKlass((TypeKlass) ownerClass)
  57                         .setExceptionSafe(exceptionSafe)
  58                         .setNoConsts(noconsts)
  59                         .setResultType(type)
  60                         .getExpressionFactory();
  61                 SymbolTable.push();
  62                 if (type.equals(resultType)) {
  63                     IRNode expr = expressionFactory.produce();
  64                     SymbolTable.merge();
  65                     return expr;
  66                 } else if ((!exceptionSafe || exceptionSafe && !(type instanceof TypeKlass))
  67                         && type.canExplicitlyCastTo(resultType)) {
  68                     // In safe mode we cannot explicitly cast an object, because it may throw.
  69                     IRNode castOperator = new CastOperator(resultType, expressionFactory.produce());
  70                     SymbolTable.merge();
  71                     return castOperator;
  72                 }
  73                 throw new ProductionFailedException();
  74             } catch (ProductionFailedException e) {
  75                 SymbolTable.pop();
  76             }
  77         }
  78         throw new ProductionFailedException();
  79     }
  80 }