[PATCH, AVR]PING^2 Fix PR target/41885 AVR Rotate patterns

[Andrew Hutchinson]

Hopefully final patch for approval for 4.5 Head

The attached patch changes AVR target  rotate split patterns to use 
simple moves in all cases where the rotation is by 8,16,24 bits etc
Theses  new patterns use mode iterators and now also split DI mode rotates.


2010-1-2  Andy Hutchinson  <hutchinsonandy@gcc.gnu.org>

   PR target/41885
   * avr.md (rotlqi3): Add CONST_INT_P check.
   (rotlhi3): Delete.
   (rotlhi3_8): Delete.
   (rotlsi3): Delete.
   (rotlsi3_8): Delete.
   (rotlsi3_16): Delete.
   (rotlsi3_24): Delete.
   (rotl<mode>3): New.
   (*rotw<mode>3): New.
   (*rotb<mode>3): New.
   *avr.c (avr_rotate_bytes): New function.
   *avr-proto.h (avr_rotate_bytes): New function.
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