[Bug target/56439] global and local register variables don't work in a useful way -- AVR

[rfmerrill at berkeley dot edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56439

--- Comment #4 from Robert "Finny" Merrill <rfmerrill at berkeley dot edu> 2013-02-25 05:46:29 UTC ---
Wouldn't that be a reason /against/ doing this:

        mov r24,r4
        lsl r24
        mov r4,r24

instead of just lsl r4?