jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/code/TypeTag.java@9851071b551a (annotated)

src/share/classes/com/sun/tools/javac/code/TypeTag.java@9851071b551a (annotated)

src/share/classes/com/sun/tools/javac/code/TypeTag.java

Tue, 18 Jun 2013 19:02:48 +0100

author: vromero
date: Tue, 18 Jun 2013 19:02:48 +0100
changeset 1826: 9851071b551a
parent 1442: fcf89720ae71
child 1853: 831467c4c6a7
permissions: -rw-r--r--

8016267: javac, TypeTag refactoring has provoked performance issues
Reviewed-by: jjg

 /*
  * Copyright (c) 1999, 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.tools.javac.code;
 import com.sun.source.tree.Tree.Kind;
 import javax.lang.model.type.TypeKind;
 import static com.sun.tools.javac.code.TypeTag.NumericClasses.*;
 /** An interface for type tag values, which distinguish between different
  *  sorts of types.
  *
  *  <p><b>This is NOT part of any supported API.
  *  If you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public enum TypeTag {
     /** The tag of the basic type `byte'.
      */
     BYTE(BYTE_CLASS, BYTE_SUPERCLASSES,
             TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `char'.
      */
     CHAR(CHAR_CLASS, CHAR_SUPERCLASSES,
             TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `short'.
      */
     SHORT(SHORT_CLASS, SHORT_SUPERCLASSES,
             TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `int'.
      */
     INT(INT_CLASS, INT_SUPERCLASSES,
             TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `long'.
      */
     LONG(LONG_CLASS, LONG_SUPERCLASSES, TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `float'.
      */
     FLOAT(FLOAT_CLASS, FLOAT_SUPERCLASSES, TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `double'.
      */
     DOUBLE(DOUBLE_CLASS, DOUBLE_CLASS, TypeTagKind.PRIMITIVE | TypeTagKind.NUMERIC),
     /** The tag of the basic type `boolean'.
      */
     BOOLEAN(TypeTagKind.PRIMITIVE),
     /** The tag of the type `void'.
      */
     VOID(TypeTagKind.VOID),
     /** The tag of all class and interface types.
      */
     CLASS(TypeTagKind.REFERENCE),
     /** The tag of all array types.
      */
     ARRAY(TypeTagKind.REFERENCE),
     /** The tag of all (monomorphic) method types.
      */
     METHOD(TypeTagKind.OTHER),
     /** The tag of all package "types".
      */
     PACKAGE(TypeTagKind.OTHER),
     /** The tag of all (source-level) type variables.
      */
     TYPEVAR(TypeTagKind.REFERENCE),
     /** The tag of all type arguments.
      */
     WILDCARD(TypeTagKind.REFERENCE),
     /** The tag of all polymorphic (method-) types.
      */
     FORALL(TypeTagKind.OTHER),
     /** The tag of deferred expression types in method context
      */
     DEFERRED(TypeTagKind.OTHER),
     /** The tag of the bottom type {@code <null>}.
      */
     BOT(TypeTagKind.OTHER),
     /** The tag of a missing type.
      */
     NONE(TypeTagKind.OTHER),
     /** The tag of the error type.
      */
     ERROR(TypeTagKind.REFERENCE | TypeTagKind.PARTIAL),
     /** The tag of an unknown type
      */
     UNKNOWN(TypeTagKind.PARTIAL),
     /** The tag of all instantiatable type variables.
      */
     UNDETVAR(TypeTagKind.PARTIAL),
     /** Pseudo-types, these are special tags
      */
     UNINITIALIZED_THIS(TypeTagKind.OTHER),
     UNINITIALIZED_OBJECT(TypeTagKind.OTHER);
     final boolean isPrimitive;
     final boolean isNumeric;
     final boolean isPartial;
     final boolean isReference;
     final boolean isPrimitiveOrVoid;
     final int superClasses;
     final int numericClass;
     private TypeTag(int kind) {
         this(0, 0, kind);
     }
     private TypeTag(int numericClass, int superClasses, int kind) {
          isPrimitive = (kind & TypeTagKind.PRIMITIVE) != 0;
          isNumeric = (kind & TypeTagKind.NUMERIC) != 0;
          isPartial = (kind & TypeTagKind.PARTIAL) != 0;
          isReference = (kind & TypeTagKind.REFERENCE) != 0;
          isPrimitiveOrVoid = ((kind & TypeTagKind.PRIMITIVE) != 0) ||
                  ((kind & TypeTagKind.VOID) != 0);
          this.superClasses = superClasses;
          this.numericClass = numericClass;
      }
     static class TypeTagKind {
         static final int PRIMITIVE = 1;
         static final int NUMERIC = 2;
         static final int REFERENCE = 4;
         static final int PARTIAL = 8;
         static final int OTHER = 16;
         static final int VOID = 32;
     }
     public static class NumericClasses {
         public static final int BYTE_CLASS = 1;
         public static final int CHAR_CLASS = 2;
         public static final int SHORT_CLASS = 4;
         public static final int INT_CLASS = 8;
         public static final int LONG_CLASS = 16;
         public static final int FLOAT_CLASS = 32;
         public static final int DOUBLE_CLASS = 64;
         static final int BYTE_SUPERCLASSES = BYTE_CLASS | SHORT_CLASS | INT_CLASS |
                 LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
         static final int CHAR_SUPERCLASSES = CHAR_CLASS | INT_CLASS |
                 LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
         static final int SHORT_SUPERCLASSES = SHORT_CLASS | INT_CLASS |
                 LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
         static final int INT_SUPERCLASSES = INT_CLASS | LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
         static final int LONG_SUPERCLASSES = LONG_CLASS | FLOAT_CLASS | DOUBLE_CLASS;
         static final int FLOAT_SUPERCLASSES = FLOAT_CLASS | DOUBLE_CLASS;
     }
     public boolean isStrictSubRangeOf(TypeTag tag) {
         /*  Please don't change the implementation of this method to call method
          *  isSubRangeOf. Both methods are called from hotspot code, the current
          *  implementation is better performance-wise than the commented modification.
          */
         return (this.superClasses & tag.numericClass) != 0 && this != tag;
     }
     public boolean isSubRangeOf(TypeTag tag) {
         return (this.superClasses & tag.numericClass) != 0;
     }
     /** Returns the number of type tags.
      */
     public static int getTypeTagCount() {
         // last two tags are not included in the total as long as they are pseudo-types
         return (UNDETVAR.ordinal() + 1);
     }
     public Kind getKindLiteral() {
         switch (this) {
         case INT:
             return Kind.INT_LITERAL;
         case LONG:
             return Kind.LONG_LITERAL;
         case FLOAT:
             return Kind.FLOAT_LITERAL;
         case DOUBLE:
             return Kind.DOUBLE_LITERAL;
         case BOOLEAN:
             return Kind.BOOLEAN_LITERAL;
         case CHAR:
             return Kind.CHAR_LITERAL;
         case CLASS:
             return Kind.STRING_LITERAL;
         case BOT:
             return Kind.NULL_LITERAL;
         default:
             throw new AssertionError("unknown literal kind " + this);
         }
     }
     public TypeKind getPrimitiveTypeKind() {
         switch (this) {
         case BOOLEAN:
             return TypeKind.BOOLEAN;
         case BYTE:
             return TypeKind.BYTE;
         case SHORT:
             return TypeKind.SHORT;
         case INT:
             return TypeKind.INT;
         case LONG:
             return TypeKind.LONG;
         case CHAR:
             return TypeKind.CHAR;
         case FLOAT:
             return TypeKind.FLOAT;
         case DOUBLE:
             return TypeKind.DOUBLE;
         case VOID:
             return TypeKind.VOID;
         default:
             throw new AssertionError("unknown primitive type " + this);
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/code/TypeTag.java@9851071b551a (annotated)

src/share/classes/com/sun/tools/javac/code/TypeTag.java