On Tue, Aug 02, 2005 at 02:29:44PM -0700, Mike Stump wrote: > On Aug 2, 2005, at 1:45 PM, Ian Lance Taylor wrote: > >That argument doesn't make sense to me. memcpy takes a void* > >argument, which has no presumed alignment. > > The memcpy builtin uses the static type of the actual argument > (before conversion to void*), to gain hints about the alignments of > the data coming in. This is so that we can producing nice fast code > for 1-16 bytes objects. This is actually good. The real problem is > formation of the address of the member doesn't produce a pointer to > unaligned type, but rather a pointer to aligned type, this is the > part that is wrong. We'd have to add pointers to unaligned data to > our type system to fix it. That should be done, but is a hard/big > job, and no one has stepped forward to do it.
So my suggestion to just make pointers to unaligned objects void* would work in this case, then.
