Does anyone know why -mno-sse is specified on Clang x64?
https://github.com/tianocore/edk2/commit/6f756db5ea057ff10dd168c7627163cec046a3d9
There doesn't seem to be a corresponding flag for other compilers.

I ask because a commit in LLVM breaks compilation of EDK2:
https://reviews.llvm.org/rL357317#change-QSW9B7DqCGUI