llvm dev - Oct 2017 - LLVM Fatal Error: Alignment is limited to 32 bytes

I'm working on porting the flang (LLVM) fortran compiler to windows. One
problem I ran into that I need help with is the following:

fatal error: error in backend: alignment is limited to 32-bytes
This happens when compiling some fortran files and is from here:

https://github.com/llvm-mirror/llvm/blob/806f68bbab5118c0252fdeaf1d84fc17ba9dae5c/lib/MC/MCWinCOFFStreamer.cpp#L230

What does this mean and will it be difficult to resolve it?
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