[PATCH for H8/300]:Fix ICE for H8SX

[Kazu Hirata]

Hi Naveen,

>>>What does the xor insn that triggers an ICE look like?
> 
> The assembly file(.s) generated when the ICE is generated is
> as follows:
> mov.l   er6,@-er7
> mov.l   er7,er6
> bnot 

Sorry, I meant to ask what the insn looks in RTL.  To see this, you can use gdb. 
  Let gcc cause ICE.  Go up several frames.  Then you should have access to the 
whole insn.  In other words, I'd like to see operands in the xorqi insn.  You 
should get something of the form

(set (...)
      (xor:QI (...)
              (...)))

with "..." filled properly.

Thanks,

Kazu Hirata