http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60181
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- I think that it needs to be decided on a case-by-case basis whether the runtime complex division routine is "precise enough". But yes, you generally cannot expect constant folding and runtime execution to produce the exact same result. This is FP after all ... (I would expect it for operations that are specified to be rounded correctly to 0.5ulp precision though) Note that the goal we have instead is that cross-compiling from all hosts produces the same constant folding results for a target (code generation doesn't depend on the host).
