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6816548: Uninitialized register when performing casting + auto(un)boxing

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Constant value of final variable is lost during lowering

Reviewed-by: jjg
This commit is contained in:
Maurizio Cimadamore 2009-03-25 10:28:52 +00:00
parent 8321605121
commit d0892edd69
2 changed files with 68 additions and 2 deletions
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4
langtools/src/share/classes/com/sun/tools/javac/comp/Lower.java
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@ -2631,8 +2631,8 @@ public class Lower extends TreeTranslator {
if (havePrimitive) {
Type unboxedTarget = types.unboxedType(type);
if (unboxedTarget.tag != NONE) {
if (!types.isSubtype(tree.type, unboxedTarget))
tree.type = unboxedTarget; // e.g. Character c = 89;
if (!types.isSubtype(tree.type, unboxedTarget)) //e.g. Character c = 89;
tree.type = unboxedTarget.constType(tree.type.constValue());
return (T)boxPrimitive((JCExpression)tree, type);
} else {
tree = (T)boxPrimitive((JCExpression)tree);

66
langtools/test/tools/javac/boxing/T6816548.java Normal file
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@ -0,0 +1,66 @@
/*
* Copyright 2009 Sun Microsystems, Inc. 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.
*
* 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
/*
* @test
* @bug 6816548
* @summary Uninitialized register when performing casting + auto(un)boxing
* @author mcimadamore
*/
public class T6816548 {
public static void main(String[] args) {
testInt();
testShort();
testByte();
testChar();
}
public static void testInt() {
final int fi = 0;
Byte b = fi;
Short s = fi;
Character c = fi;
}
public static void testShort() {
final short fs = 0;
Byte b = fs;
Short s = fs;
Character c = fs;
}
public static void testByte() {
final byte fb = 0;
Byte b = fb;
Short s = fb;
Character c = fb;
}
public static void testChar() {
final char fc = '0';
Byte b = fc;
Short s = fc;
Character c = fc;
}
}