[clang] [llvm] [MIPS] LLVM data layout give i128 an alignment of 16 for mips64 (PR #112084)

[Nikita Popov via cfe-commits]

https://github.com/nikic commented:

This looks technically fine, but I'm having trouble finding a normative reference for this. Is there an ABI specification for N32/N64 somewhere?

Also, what alignment does clang use for o32 with ForceEnableInt128? https://github.com/llvm/llvm-project/blob/cb2f1619575400a402ffe11040bb927b0fa35910/clang/lib/Basic/Targets/Mips.h#L441 Possibly we need to specify the alignment in that case as well to cover that option.

https://github.com/llvm/llvm-project/pull/112084