[Bug target/118888] GCC only optimize 1 bits-manipulation function out of many despite having the same implementations.

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118888

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2025-02-15
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The only difference at the gimple level is order of operations for the or. so
if anything this is all by accident and it is an reassociation issue and
pattern matching.

With -fno-tree-ter even setSquare3 does not match bts.

Looks like GCC 8 had some more usage of bts but GCC 9 didn't.