PR target/16482: first scheduling pass on SH4

[Joern RENNECKE]

Kaz Kojima wrote:

>    
>
>I hope that those failures also come from the lcm.c problem suggested
>by Joern.
>  
>
 
The STMicroelectronics Copyright assignment papers have now been signed, 
and are expected
to be with the FSF by middle of next week.

I have written a patch for PR16482 today, as outlined in my analysis; if 
you like, I can send to
it you now.