------- Comment #7 from rguenth at gcc dot gnu dot org 2007-06-12 21:57 -------
The difference is that we iterated jump threading in DOM in 4.1 but do so no
longer. On the mainline each dom and vrp pass figures more jump threading
opportunities - just not enough. With 4.1 the third and last DOM pass doesn't
find any more.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[4.2/4.3 Regression] Bad |[4.2/4.3 Regression] DOM
|Code generation ( Tree |chooses bad jump threading
|optimization ) |targets.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32306
