Re: On alignment

[Andrew Haley <aph at redhat dot com>]

Tom Tromey writes:
 > >>>>> "Kevin" == Kevin B Hendricks <kevin dot hendricks at sympatico dot ca> writes:
 > 
 > Kevin> Will having long long int aligned to 8 and double aligned to 4
 > Kevin> create any problems for gcj if a similar alignment macro is
 > Kevin> used for gcj given that doubles and long long int are
 > Kevin> different?
 > 
 > I'm not certain.  My understanding is that g++ does all the field
 > alignment in the front end,

Not entirely, I don't think.  It's a mixture of both, which is AFAIK
the source of these problems.

 > while gcj completely relies on stor-layout to do it.  So the
 > question is whether g++ (with whatever hack we're adding to the
 > generated headers) and stor-layout agree in the above scenario.

With the C++ layout bugs fixed, I expect this will be fine.

In the future, we need to be using the same layout code as C++.  In
fact I thought we *were*, so I didn't expect any of this.  I assumed
that when C++ moved to the new ABI gcj would automatically follow,
because we were using the same code.  I didn't realize that the C++
guys would make the changes inside their front end.

Andrew.