20  *
 21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 22  * or visit www.oracle.com if you need additional information or have any
 23  * questions.
 24  */
 25 
 26 package com.sun.tools.javac.jvm;
 27 
 28 import com.sun.tools.javac.code.*;
 29 import com.sun.tools.javac.code.Symbol.MethodSymbol;
 30 import com.sun.tools.javac.comp.Resolve;
 31 import com.sun.tools.javac.jvm.PoolConstant.LoadableConstant;
 32 import com.sun.tools.javac.tree.JCTree;
 33 import com.sun.tools.javac.tree.TreeInfo;
 34 import com.sun.tools.javac.tree.TreeMaker;
 35 import com.sun.tools.javac.util.*;
 36 
 37 import static com.sun.tools.javac.code.Kinds.Kind.MTH;
 38 import static com.sun.tools.javac.code.TypeTag.*;
 39 import static com.sun.tools.javac.jvm.ByteCodes.*;

 40 import static com.sun.tools.javac.tree.JCTree.Tag.PLUS;
 41 import com.sun.tools.javac.jvm.Items.*;
 42 
 43 import java.util.HashMap;
 44 import java.util.Map;
 45 
 46 /** This lowers the String concatenation to something that JVM can understand.
 47  *
 48  *  <p><b>This is NOT part of any supported API.
 49  *  If you write code that depends on this, you do so at your own risk.
 50  *  This code and its internal interfaces are subject to change or
 51  *  deletion without notice.</b>
 52  */
 53 public abstract class StringConcat {
 54 
 55     /**
 56      * Maximum number of slots for String Concat call.
 57      * JDK's StringConcatFactory does not support more than that.
 58      */
 59     private static final int MAX_INDY_CONCAT_ARG_SLOTS = 200;

 20  *
 21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 22  * or visit www.oracle.com if you need additional information or have any
 23  * questions.
 24  */
 25 
 26 package com.sun.tools.javac.jvm;
 27 
 28 import com.sun.tools.javac.code.*;
 29 import com.sun.tools.javac.code.Symbol.MethodSymbol;
 30 import com.sun.tools.javac.comp.Resolve;
 31 import com.sun.tools.javac.jvm.PoolConstant.LoadableConstant;
 32 import com.sun.tools.javac.tree.JCTree;
 33 import com.sun.tools.javac.tree.TreeInfo;
 34 import com.sun.tools.javac.tree.TreeMaker;
 35 import com.sun.tools.javac.util.*;
 36 
 37 import static com.sun.tools.javac.code.Kinds.Kind.MTH;
 38 import static com.sun.tools.javac.code.TypeTag.*;
 39 import static com.sun.tools.javac.jvm.ByteCodes.*;
 40 import static com.sun.tools.javac.tree.JCTree.Tag.LITERAL;
 41 import static com.sun.tools.javac.tree.JCTree.Tag.PLUS;
 42 import com.sun.tools.javac.jvm.Items.*;
 43 
 44 import java.util.HashMap;
 45 import java.util.Map;
 46 
 47 /** This lowers the String concatenation to something that JVM can understand.
 48  *
 49  *  <p><b>This is NOT part of any supported API.
 50  *  If you write code that depends on this, you do so at your own risk.
 51  *  This code and its internal interfaces are subject to change or
 52  *  deletion without notice.</b>
 53  */
 54 public abstract class StringConcat {
 55 
 56     /**
 57      * Maximum number of slots for String Concat call.
 58      * JDK's StringConcatFactory does not support more than that.
 59      */
 60     private static final int MAX_INDY_CONCAT_ARG_SLOTS = 200;