[Bug tree-optimization/47707] Loss of step type precision leads to bad scalar evolution

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47707

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-11 
20:56:09 UTC ---
Yeah, signed_type_for isn't really suitable for middle-end use.