[Bug target/109259] rs6000:pass_analyze_swaps should preserve some rtx notes

[linkw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109259

Kewen Lin <linkw at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
                 CC|                            |bergner at gcc dot gnu.org,
                   |                            |segher at gcc dot gnu.org
             Target|                            |powerpc64le-linux-gnu