erichkeane added inline comments.

================
Comment at: clang/lib/Sema/SemaChecking.cpp:4489
+        // Alignment calculations can wrap around if it's greater than 2**29.
+        unsigned MaximumAlignment = 536870912;
+        if (I > MaximumAlignment)
----------------
jdoerfert wrote:
> erichkeane wrote:
> > I thought we had this stored somewhere else?  We probably should have this 
> > be a constant somewhere in the frontend.  I THINK I remember doing a review 
> > where I pulled this value into clang somewhere...
> That was D72998, and I don't think Clang is the right place for this 
> constant. It is a property of the llvm alignment attribute and it should live 
> there. Thus, llvm/include/Attributes.h or some similar place. Can't we "fix" 
> the linker error by making it a constexpr global or are the errors because of 
> other file content? If the latter, we could go with a 
> llvm/include/magic_constants.h ;)
The one I was thinking of was this one: https://reviews.llvm.org/D68824

I don't remember what we came up with on the linking issue.  It would be really 
nice if it was just something included from LLVM, but I think SEMA typically 
doesn't include stuff from LLVM either.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D72996/new/

https://reviews.llvm.org/D72996



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