[Bug c++/83331] Compile time evaluation of cbrt does not match library evaluation

marxin at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Wed Dec 20 12:06:00 GMT 2017


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83331

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |marxin at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org

--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
It's caused by fact that without optimization level std::cbrt (123.456) is
optimized in front-end, while std::cbrt (x) not.
However I'm not expert about the floating point behavior.


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