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c5ab70c508
Clang [defaults to aligning `__int128_t` to 16 bytes], while LLVM `datalayout` strings [default to aligning `i128` to 8 bytes]. Wasm is currently using the defaults for both, so it's inconsistent. Fix this by adding `-i128:128` to Wasm's `datalayout` string so that it aligns `i128` to 16 bytes too. This is similar to [llvm/llvm-project@dbad963](dbad963a69) for SPARC. This fixes rust-lang/rust#133991; see that issue for further discussion. [defaults to aligning `__int128_t` to 16 bytes]:f8b4182f07/clang/lib/Basic/TargetInfo.cpp (L77)[default to aligning `i128` to 8 bytes]: https://llvm.org/docs/LangRef.html#langref-datalayout