[Bug tree-optimization/51446] -fno-trapping-math generates NaN constant with different sign

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51446

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-12-07 12:51:39 UTC ---
I get

-2251799813685248 9221120237041090560

vs.

-2251799813685248 -2251799813685248

the subtraction is carried out with 4.7, also with 4.6.2.