[LLVMdev] Unpacked Structures within Packed Structures

Chris Lattner clattner at apple.com
Thu Feb 4 13:46:19 PST 2010

On Feb 4, 2010, at 8:53 AM, John Criswell wrote:

> Dear LLVMers,
> I have a question on packed structures in LLVM 2.6.
> Is it possible to place an unpacked structure type as a member  
> within a
> packed structure type?  What I want to do is to have the fields of an
> inner structure padded per the ABI but have the elements of the outer
> structure packed.

Yep, that should work fine.  One issue to watch out for is that the  
elements of the non-packed struct may not be properly aligned if the  
entire thing is off.


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