[llvm-dev] [RFC] Matrix support (take 2)

[Steve (Numerics) Canon via llvm-dev]

On Dec 6, 2018, at 12:57, John McCall <jmccall at apple.com> wrote:

>> I assumed that it was meant to only allow increasing alignment.
> 
> Are you talking about the Clang attribute?  Yes, IIRC, that attribute is defined as not lowering alignment unless it's combined with packed.

The clang attribute does not lower alignment on structs (or struct members) without packed, but it does lower alignment on typedefs.