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On Sep 13, 2008, at 1:07 PM, Matthijs Kooijman wrote: > Hi Dan, > >> Changing PromoteCastOfAllocation to not replace aggregate allocas >> with >> non-aggregate allocas if they have GEP users sounds reasonable to me. > This sounds reasonable indeed, but still a bit arbitrary. Haven't > figured out > anything better yet, though. > >> Finding the

Hi Dan, > Changing PromoteCastOfAllocation to not replace aggregate allocas with > non-aggregate allocas if they have GEP users sounds reasonable to me. This sounds reasonable indeed, but still a bit arbitrary. Haven't figured out anything better yet, though. > Finding the maximum alignment is sometimes still useful though, so > it would be nice to update the alignment field of

Hi Dan, > Oh, ok. So code that takes an alloca, bitcasts the address to a higher > alignment, Since alignment is not a property of a type, I don't think you can "bitcast to a higher alignment" as such. I still understand what you mean, though :-) > and then does a load or store at the higher alignment, is > invoking undefined behavior. The alignment attribute on a load