[PATCH] D100591: [Clang][AArch64] Disable rounding of return values for AArch64

[Tim Northover via Phabricator via cfe-commits]

t.p.northover added a comment.

On big-endian targets the rounding up to 64-bits (specified in the AAPCS) is significant; it means that structs get passed in the high bits of `x0` rather than low. E.g. https://godbolt.org/z/6v36oexsW. I think this patch would break that.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D100591/new/

https://reviews.llvm.org/D100591