| commit | 80d25ea84b6fa9342f1432a07ba0d0612ff72e48 | [log] [tgz] |
|---|---|---|
| author | Andy McFadden <fadden@android.com> | Fri Jun 12 07:26:17 2009 -0700 |
| committer | Andy McFadden <fadden@android.com> | Mon Jun 15 16:17:03 2009 -0700 |
| tree | 2e3802764aac1c9278e5f9dec8337e00c702c59b | |
| parent | 042002aab6d0cc744d65a4a788aa0e2597a193a8 [diff] |
Treat some right shifts as narrowing conversions. Java bytecode optimizers like ProGuard will remove explicit integer width conversions from certain sequences. For example, after right-shifting an integer 24 times, an int-to-byte instruction is redundant. This change teaches the verifier that right shifts sometimes reduce (or at least don't increase) the width of an integer. Previously, the result of a right shift was always a full-sized int.