[Bug tree-optimization/92979] bswap not finding a bswap with a memory load at the beginging of the instruction stream

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92979

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ideally bswap would be less ad-hoc but work as a propagator with a lattice of
symbolic values.