2008-05-26  Tristan Gingold <gingold@adacore.com>
            Anatoly Sokolov <aesok@post.ru>

        * config/avr/avr.md ("call_prologue_saves"): Use hi8(gs())/lo8(gs())
        instead of pm_lo8/pm_hi8 to makes this call working on avr6.
        * config/avr/avr.c (expand_prologue): Tune "call_prologue" 
        optimization for 'avr6' architecture.

Index: gcc/config/avr/avr.c
===================================================================
--- gcc/config/avr/avr.c        (revision 135845)
+++ gcc/config/avr/avr.c        (working copy)
@@ -682,7 +694,9 @@
       /* Prevent any attempt to delete the setting of ZERO_REG!  */
       emit_insn (gen_rtx_USE (VOIDmode, zero_reg_rtx));
     }
-  if (minimize && (frame_pointer_needed || live_seq > 6)) 
+  if (minimize && (frame_pointer_needed 
+                  || (AVR_2_BYTE_PC && live_seq > 6)
+                  || live_seq > 7)) 
     {
       insn = emit_move_insn (gen_rtx_REG (HImode, REG_X), 
                              gen_int_mode (size, HImode));
--- gcc/config/avr/avr.md.orig	Wed Aug 20 16:55:20 2008
+++ gcc/config/avr/avr.md	Wed Aug 20 16:59:52 2008
@@ -2764,8 +2764,8 @@
    (use (reg:HI REG_X))
    (clobber (reg:HI REG_Z))]
   ""
-  "ldi r30,pm_lo8(1f)
-	ldi r31,pm_hi8(1f)
+  "ldi r30,lo8(gs(1f))
+	ldi r31,hi8(gs(1f))
 	%~jmp __prologue_saves__+((18 - %0) * 2)
 1:"
   [(set_attr_alternative "length"