[PATCH] fortran/50514 -- Fix static chekcing of ISHFT[C] arguments.

[Steve Kargl]

This patch fixes the checking of constant SHIFT values against
the bitsize of the argument to be shifted.  I've been running
this patch on amd64-*-freebsd for sevearl days without a
problem (ie., multiple 'gmake check-gfortran' invocations).

OK for trunk?

2011-10-15  Steven G. Kargl  <kargl@gcc.gnu.org>

	* gfortran.dg/ishft_3.f90:  Update test.

2011-10-15  Steven G. Kargl  <kargl@gcc.gnu.org>

	* check.c (less_than_bitsize1): Check |shift| <= bit_size(i).
	(gfc_check_ishftc):  Check |shift| <= bit_size(i) and check
	that size is positive.

-- 
Steve
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