[Bug rtl-optimization/50078] [4.6/4.7 Regression] combine wrong code: volatile accesses optimized out

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50078
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-08-15 
09:13:40 UTC ---
noop_move_p returns true for this - ignoding the side-effects.