Better handling for multi-word values?

[Jason Merrill]

>>>>> Richard Henderson <rth@cygnus.com> writes:

 > On Mon, Sep 07, 1998 at 01:56:37PM -0600, Jeffrey A Law wrote:
 >> So if concats where extended to handle multiple objects would we be
 >> able to use them to do the same thing efficiently?
 >> 
 >> Or should CONCAT go away after your MULTIWORD changes?

 > Six the one, half dozen the other.

 > I'm not sure how much a thing like MULTIWORD buys us, at least
 > in the context of the DImode bits being discussed here.  It's
 > basically SUBREGs turned inside out, and would still require
 > special code in combine and elsewhere to be able to deal with
 > them effectively.

Yes.  Having to reload and store both words together drastically reduces
the utility of this code.  C++ would benefit greatly from being able to
break down a structure into its components and refer to them separately;
especially for things like complex number classes, having to go to memory
is a big lose.

Jason