[Bug target/77822] [6 Regression] arm64 Error: immediate value out of range 0 to 63 at operand 3

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77822

--- Comment #21 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah, so combine isn't really doing anything wrong here -- for the "plain"
shift it already only refuses it because the target does not allow it.
Some targets *do* allow shifting by amounts more than a register width.