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 jdk.test.lib.Pair;
  27 import jdk.test.lib.jittester.BinaryOperator;
  28 import jdk.test.lib.jittester.IRNode;
  29 import jdk.test.lib.jittester.OperatorKind;
  30 import jdk.test.lib.jittester.ProductionFailedException;
  31 import jdk.test.lib.jittester.SymbolTable;
  32 import jdk.test.lib.jittester.Type;
  33 import jdk.test.lib.jittester.types.TypeKlass;
  34 import jdk.test.lib.jittester.utils.PseudoRandom;
  35 
  36 abstract class BinaryOperatorFactory extends OperatorFactory {
  37     protected final OperatorKind opKind;
  38     protected final Type resultType;
  39     protected final Type ownerClass;
  40 
  41     protected BinaryOperatorFactory(OperatorKind opKind, long complexityLimit, int operatorLimit,
  42             Type ownerClass, Type resultType, boolean exceptionSafe, boolean noconsts) {
  43         super(opKind.priority, complexityLimit, operatorLimit, exceptionSafe, noconsts);
  44         this.opKind = opKind;
  45         this.resultType = resultType;
  46         this.ownerClass = ownerClass;
  47     }
  48 
  49     protected abstract boolean isApplicable(Type resultType);
  50 
  51     protected abstract Pair<Type, Type> generateTypes() throws ProductionFailedException;
  52 
  53     protected BinaryOperator generateProduction(Type leftType, Type rightType) throws ProductionFailedException {
  54         int leftOpLimit = (int) (PseudoRandom.random() * (operatorLimit - 1));
  55         int rightOpLimit = operatorLimit - 1 - leftOpLimit;
  56         long leftComplLimit = (long) (PseudoRandom.random() * (complexityLimit - 1));
  57         long rightComplLimit = complexityLimit - 1 - leftComplLimit;
  58         if (leftOpLimit == 0 || rightOpLimit == 0 || leftComplLimit == 0 || rightComplLimit == 0) {
  59             throw new ProductionFailedException();
  60         }
  61         boolean swap = PseudoRandom.randomBoolean();
  62         IRNodeBuilder builder = new IRNodeBuilder().setExceptionSafe(exceptionSafe)
  63                 .setOwnerKlass((TypeKlass) ownerClass)
  64                 .setNoConsts(!swap && noconsts);
  65         IRNode leftExpr = builder.setComplexityLimit(leftComplLimit)
  66                 .setOperatorLimit(leftOpLimit)
  67                 .setResultType(leftType)
  68                 .getExpressionFactory()
  69                 .produce();
  70         IRNode rightExpr = builder.setComplexityLimit(rightComplLimit)
  71                 .setOperatorLimit(rightOpLimit)
  72                 .setResultType(rightType)
  73                 .getExpressionFactory()
  74                 .produce();
  75         return new BinaryOperator(opKind, leftExpr, rightExpr);
  76     }
  77 
  78     @Override
  79     public final IRNode produce() throws ProductionFailedException {
  80         if (!isApplicable(resultType)) {
  81             //avoid implicit use of resultType.toString()
  82             throw new ProductionFailedException("Type " + resultType.getName() + " is not applicable by " + getClass().getName());
  83         }
  84 
  85         Pair<Type, Type> types;
  86         try {
  87             types = generateTypes();
  88         } catch (RuntimeException ex) {
  89             throw new ProductionFailedException(ex.getMessage());
  90         }
  91 
  92         try {
  93             SymbolTable.push();
  94             IRNode p = generateProduction(types.first, types.second);
  95             SymbolTable.merge();
  96             return p;
  97         } catch (ProductionFailedException e) {
  98             SymbolTable.pop();
  99             throw e;
 100         }
 101     }
 102 }