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

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yingopq wrote:

> 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.

I did not find any ABI specification for N32/N64 about i128 alignment, and I am doing research about the ForceEnableInt128.

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