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Re: Fix double_int overflow in VRP PLUS_EXPR

On Wed, Aug 22, 2012 at 02:19:19PM +0200, Richard Guenther wrote:
> > 2012-08-21  Marc Glisse  <marc.glisse@inria.fr>
> >
> >         PR tree-optimization/54317
> >
> > gcc/
> >         * tree-vrp.c (extract_range_from_binary_expr_1): Test for
> >         double_int overflow.
> >         Remove dead tests.
> >
> > gcc/testsuite/
> >         * gcc.dg/tree-ssa/vrp79.c: New testcase.
> >
> > --
> > +  n <<= (8 * sizeof (NT) - 1);

Better use __CHAR_BIT__ instead of 8 here...

	Jakub
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