Call gen_zvdep_imm when operand 1 is a CONST_INT.
(zvdep_imm): New pattern.
(ashift recognizer for [reg const_int]): Use %P and %L
output modifiers.
(ashiftrt recognizer for [reg const_int]): Likewise.
(lshrsi3): Likewise.
(rotrsi3): Reduce integer argument to 5 bits.
Remove some empty lines.

From-SVN: r3622