[sparse-llvm] LLVM and alignment

[Pekka Enberg <penberg@xxxxxxxxx>]

Hi,

I looked at adding struct support yesterday and it seems rather
straight-forward. I'll hopefully have a working patch today. I noticed
one issue with alignment, though.

The LLVMStructType() function wants to know if a structure is packed
or not. Initially I thought we can just make all structures non-packed
since sparse takes care of that and sets up alignment to 1 byte.
Unfortunately I then noticed that LLVM doesn't actually seem to allow
you to change _type alignment_ but only _value alignment_. The latter
is done with the LLVMSetAlignment() function and seems to be limited
to global variables.

Jeff, any ideas?

                        Pekka
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