https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85992
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
You get the runtime value computed by libm when not optimizing and the mpfr
result when GCC applies constant folding.
Iff then this is a libm bug not providing an exact result - but this is
expected as you are dealing with FP.
