[Bug middle-end/91213] Missed optimization: (sub X Y) -> (xor X Y) when Y <= X and isPowerOf2(X + 1)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91213

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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           Assignee|pinskia at gcc dot gnu.org         |unassigned at gcc dot gnu.org

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I am no longer working on this. Yes expansion should do it rather than match.