[clang] [llvm] [Clang][CodeGen][X86] Fix crash on __int128 bit-field access units (PR #216777)

[Phoebe Wang via cfe-commits]

phoebewang wrote:

No against reverting, but is the problem just missing a `-fclang-abi-compat=23`? I think it's also ok to commit a seperate patch for it.

https://github.com/llvm/llvm-project/pull/216777