Re: STRICT_ALIGNMENT is too strict for m68k

[Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>]

Jeffrey A Law <law@cygnus.com> writes:

|>   In message < Pine.LNX.3.96.980517174658.6643A-100000@jinks.home >you write:
|>   > > Yes.  See how it affects the alignment (and thus the size) of a 
|>   > > structure in layout_record.
|>   > 
|>   > I see. Thanks for the explanation.
|> It also effects how parameters are passed in registers for some
|> targets (see calls.c).

The m68k does not pass parameters in registers.

|>   > However, I spent some time today on this part of stor-layout.c trying to
|>   > understand it and build a testcase that would prove my patch wrong and so
|>   > far I failed.
|> Not worth the trouble to write a testcase for this.  We know the
|> change is ABI unsafe.

I have changed STRICT_ALIGNMENT to 0 some time ago in m68k-linux, and no
structure layout has ever changed.  I'm not convinced that this change
ever effects it, only the way unaligned accesses are handled.

-- 
Andreas Schwab                                      "And now for something
schwab@issan.informatik.uni-dortmund.de              completely different"
schwab@gnu.org