[Bug tree-optimization/94877] Failure to simplify ~(x + 1) to -2 - x

jakub at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Wed May 6 14:55:21 GMT 2020


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

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

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I'm not sure why this is considered a simplification, two insns vs. two, and on
the subtraction it isn't specific to just one target, but I think for most the
constant will need to be forced into register, the immediates the instructions
have is mostly for the second operand.

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