[llvm] [BOLT] Optimize the codegen of createLoadImmediate for AArch64. (PR #137413)

[Rodrigo Rocha via llvm-commits]

rcorcs wrote:

hi @maksfb , thank you for your suggestion. I've modified the implementation of AArch64MCPlusBuilder to make use of AArch64_IMM::expandMOVImm().
I think it makes sense to reuse the same implementation that is already used by LLVM's AArch64 backend.

https://github.com/llvm/llvm-project/pull/137413