http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50088
--- Comment #11 from H.J. Lu <hjl.tools at gmail dot com> 2011-08-16 14:45:27 UTC --- Can we model shift instructions to take any QI/HI/SI/DI register as shift count and make IRA to match the size when reading/writing shift count?
