[llvm] [AVR] Force relocations for non-encodable jumps (PR #121498)

[Ben Shi via llvm-commits]

benshi001 wrote:

I have tested with avr-gcc, it seems avr-gcc also leave such tasks to the linker, so I agree with this change. Please fix other concerns of @arsenm .

https://github.com/llvm/llvm-project/pull/121498