[Bug middle-end/95922] Failure to optimize `((b ^ a) & c) ^ a` to `(a & ~c) | (b & c)` the right way on architectures with andnot

jakub at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Nov 20 11:06:19 GMT 2020


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95922

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What would be the advantage of doing that?
Same number of instructions, but with andn 3 bytes longer...


More information about the Gcc-bugs mailing list