This alias for andi x, 255 was recently added to the spec. If we
print it, code we output can't be compiled with -fno-integrated-as
unless the GNU assembler is also a version that supports alias.
Sidenote: I think LLVM recently got a way of specifying the binutils version in use - I don't know if we can use that info in this part of assembly printing, or whether it's best just to wait.
Note from gnu toolchain side, GCC will detect bintuils version and behavior during configure time and set different default behavior according the version or feature support test result, but I know clang/llvm doing different way on this part.