On Apr 30, 2012, at 16:18 , Olivier Hainque wrote: >> Can you formally relate those three representations and tell me why >> VIEW_CONVERT_EXPR is useful (not only convenient because of less operands) >> to use on lvalues (thus memory, compared to registers or constants)? > > I have ideas on how they are supposed to relate (corresponding to your > intuitive understanding, what is documented), but MEM_REF and BIT_FIELD_REF > were introduced much more recently though, so I'm pretty sure that there are > details that escape me.
One area of potential difference came to mind yesterday: regarding the processing of type alignment differences. VCE to more aligned (of the same size) would make a temp copy to yield a correctly aligned object. Would MEM_REF do that as well ?
