[backport from gcc-4.7/trunk, fixes M68K PR47612 regression from PR44374 patch (r167779),
 also fixes M68K PR48554 however the latter is triggered by r169050 <mikpe@it.uu.se>]

gcc/

2011-05-04  Bernd Schmidt  <bernds@codesourcery.com>

	PR rtl-optimization/47612
	* df-problems.c (can_move_insns_across): Don't pick a cc0 setter
	as the last insn of the sequence to be moved.

--- gcc-4.6.0/gcc/df-problems.c.~1~	2011-01-26 23:45:04.000000000 +0100
+++ gcc-4.6.0/gcc/df-problems.c	2011-05-16 13:57:51.000000000 +0200
@@ -4004,7 +4004,10 @@ can_move_insns_across (rtx from, rtx to,
 	  if (bitmap_intersect_p (merge_set, test_use)
 	      || bitmap_intersect_p (merge_use, test_set))
 	    break;
-	  max_to = insn;
+#ifdef HAVE_cc0
+	  if (!sets_cc0_p (insn))
+#endif
+	    max_to = insn;
 	}
       next = NEXT_INSN (insn);
       if (insn == to)
@@ -4041,7 +4044,11 @@ can_move_insns_across (rtx from, rtx to,
     {
       if (NONDEBUG_INSN_P (insn))
 	{
-	  if (!bitmap_intersect_p (test_set, local_merge_live))
+	  if (!bitmap_intersect_p (test_set, local_merge_live)
+#ifdef HAVE_cc0
+	      && !sets_cc0_p (insn)
+#endif
+	      )
 	    {
 	      max_to = insn;
 	      break;