[Bug tree-optimization/92949] bswap/store merging does not handle BIT_INSERT_EXPR/BIT_FIELD_REF

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92949

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> Note bswap pass is very fragile.  In fact if we increase the limit by 1,
> things dont work any more.  There needs to be a better way of handling this.

PR 92979 is for that issue.  I was able to find a testcase without the
bit-field lowering.