On Mon, Mar 23, 2020 at 04:29:12PM +0100, Richard Biener wrote: > I wonder if we can leverage the bswap pass for rotate detection > (see find_bswap_or_nop which matches the symbolic number > against either 1:1 or byte-swapped variants, to be added would be > rotate and shift patterns).
That pass can only handle cases where the shift counts are multiple of
BITS_PER_UNIT, the whole infrastructure is based on being able to track
movements of bytes.
Jakub
