[llvm] [windows] Always pass fp128 arguments indirectly (PR #128848)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> That test only runs Linux, should I add the Windows targets? Some builtins calls are covered in `llvm/test/CodeGen/X86/fp128-libcalls.ll`, e.g. the call to `__addtf3` here [e0a3738#diff-ea9428e87a77d0898c35fe6d9ff99f0ed9ba709ec232da43bf9fe0915894ce3cL159-R176](https://github.com/llvm/llvm-project/commit/e0a3738d82436a5f4fac59d8fa52737118bf4165#diff-ea9428e87a77d0898c35fe6d9ff99f0ed9ba709ec232da43bf9fe0915894ce3cL159-R176)

No, I just read the patch as it affects both Linux and Windows. It looks good to me if it's Windows only.

https://github.com/llvm/llvm-project/pull/128848