Re: using frame pointer + constant in reg_equiv_constant

[Joern Rennecke <amylaar at cygnus dot co dot uk>]

> This is a reload bug.  It looks like Joern missed one case when he rewrote how
> find_reloads substitutes changed operands back into the original insn.  A
> patch follows.
> 
> If Joern agrees that this is right, then I will check it in.

I think it is right.  I remember that this code was somewhat weird and
brittle at the start when I made these patches, and some substitutions
actually had to remain in the old fashion to make things work.  But this
was probably because some piece of the other infrastructure wasn't in
place yet then.