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Int128 support on Windows [llvm bug] #3081

@vtjnash

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@vtjnash

Windows 64-bit segfaults when attempting div, mod, or rem on 128-bit numbers (it tries to call the gcc intrinsic __umodti3). This is because LLVM does not use the correct calling conventions for 128-bit numbers on windows.

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bugIndicates an unexpected problem or unintended behaviorsystem:windowsAffects only WindowsupstreamThe issue is with an upstream dependency, e.g. LLVM

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