2011-08-04 Richard Guenther <rguenther@suse.de>
* tree-vrp.c (vrp_expr_computes_nonnegative): Remove.
(value_range_nonnegative_p): New function.
(ssa_name_nonnegative_p): Use it.
(value_range_constant_singleton): New function.
(op_with_constant_singleton_value_range): Use it.
(extract_range_from_binary_expr_1): New function, split out from ...
(extract_range_from_binary_expr): ... this. Remove fallback
constant folding done here.
From-SVN: r177393
