>> Or better way to solve the problem? Appreciated a lot! > > Combine / simplify-rtx should recognize this at the RTL level for > SHIFT_COUNT_TRUNCATED targets.
IIUC, combine uses UD chains (LOG links) which is best suitable for cases where this is only one downward uses of the def. The example here has a single def and multiple-uses, which combine won't handle. David > > Richard. > >> Thanks, >> Wei.
