[Bug fortran/50514] gfortran should check ISHFT & ISHFTC aruments (r178939)

[zeccav at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50514

--- Comment #4 from Vittorio Zecca <zeccav at gmail dot com> 2011-09-29 06:58:24 UTC ---
About run time checking: I believe the bit size of k is known at compile time,
and the overhead to check n against it is negligible as compared to computing
ishft itself and maybe n.
Of course when I am asking -fcheck I am prepared to slower execution, but it
may well pay off, if I find a bug. I believe programmer (debugging) time is now
costlier than hardware time.