anatol.pomozov added a comment. Related maillist discussion is http://lists.llvm.org/pipermail/cfe-dev/2017-June/054359.html
> Are we SURE the stack alignment for this type is supposed to be 16 bit as > well? I didn't see any discussion about it in the email conversation. > I have very little understanding of this attribute, but I would (perhaps > naiively) presume that it would be different on 64 bit targets. x86_64 ABI requires 16-byte stack alignment and compiler already enforces it at the caller side. It does not work when we jump from 32bit code (where stack might not be 16-byte aligned) to 64bit code. So we need a way to enforce the stack alignment at callee side. In this case the attribute above is helpful. https://reviews.llvm.org/D36272 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
