[PATCH] frexp can be negative(!?)

[Roger Sayle]

On Tue, 2 Aug 2005, Richard Guenther wrote:
> 2005-08-02  Richard Guenther  <rguenther@suse.de>
>
> 	PR tree-optimization/23195
> 	* fold-const.c (tree_expr_nonnegative_p): frexp(x, &e) is
> 	positive if its first argument is positive.
>

I agree this is the best solution.  Ok for mainline and 4.0
(modulo any restrictions on those branches).

Thanks,

Roger
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