[PATCH] Promoted variable SUBREG optimizations

[Richard Henderson]

On Mon, Aug 11, 2003 at 09:29:59PM -0600, Roger Sayle wrote:
> Could you explain what goes wrong above?

I just said -- two alternatives don't sign extend the result.

> The comments in rtl.h seem
> to imply that an extended subreg can only be used as a LHS, when the
> required extension gets performed.  [But that might not be relevant].

You mean RHS?  If that's true, that might be correct.  I would like
to see where that LHS DImode is initialized before I believe it.

> I take it that you're happy with the dojump.c
> hunk of the patch...

I didn't read it separately, sorry.


r~