subreg against register allocation?

[Bernd Schmidt]

On 06/15/2010 12:06 AM, Ian Lance Taylor wrote:

> Well, as you know, subregs have two meanings which look similar but
> are in fact entirely different.  It's valid to set subregs of the same
> pseudo in parallel if the subregs represent different hard registers.
> It's not valid if the subregs represent different pieces of the same
> hard register.

Are you aware of any examples of this in the compiler?  The explanation
is of course plausible, but do we know that we handle this correctly
everywhere?


Bernd