[Bug rtl-optimization/52000] cross-jumping drops MEM attributes even when it makes no changes to the code

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52000

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-26 
11:21:33 UTC ---
It also calls merge_notes (so I suppose might drop REG_EQUAL notes).

Both should be delayed to commit time.