[LLVMdev] structure packing and misaligned members

edA-qa mort-ora-y eda-qa at disemia.com
Sun May 12 08:13:06 PDT 2013

I'm trying to determine how to do my packed structure compilation and am
a bit unclear about how packed structures are handled. Consider this

%struct.packed = type <{ i8, i32 }>

Now if I get a pointer to the i32 element the pointer will not be
properly aligned for a typical i32. On my current machine (x86_64) the
cpu doesn't seem to care, but I suspect this isn't true on all platforms
(not is true on this platform if I do atomic operations). Yet the
pointer for this i32 which I get is the same as a normal i32 pointer.

Is there supposed to be a special marker for possibly misaligned
pointers? Or how I am supposed to track such misaligned pointers and
ensure they aren't used incorrectly?

edA-qa mort-ora-y
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