[Bug c/35634] [4.4/4.5/4.6/4.7 Regression] operand of pre-/postin-/decrement not promoted

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35634

--- Comment #31 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-18 
08:16:58 UTC ---
Well, I'd still go for comment#14 ... we could teach VRP to shorten the
operations again, if possible, to avoid the optimization regressions.