for  gcc/ChangeLog
from  Alexandre Oliva  <aoliva@redhat.com>

	PR debug/47994
	PR debug/47919
	* combine.c (try_combine): Skip debug insns at m_split tests.

Index: gcc/combine.c
===================================================================
--- gcc/combine.c.orig	2011-04-29 02:16:34.718995124 -0300
+++ gcc/combine.c	2011-04-29 02:16:54.454998871 -0300
@@ -3457,7 +3457,7 @@ try_combine (rtx i3, rtx i2, rtx i1, rtx
 	    newpat = m_split;
 	}
       else if (m_split && NEXT_INSN (NEXT_INSN (m_split)) == NULL_RTX
-	       && (next_real_insn (i2) == i3
+	       && (next_nonnote_nondebug_insn (i2) == i3
 		   || ! use_crosses_set_p (PATTERN (m_split), DF_INSN_LUID (i2))))
 	{
 	  rtx i2set, i3set;
@@ -3474,7 +3474,7 @@ try_combine (rtx i3, rtx i2, rtx i1, rtx
 	     is used between I2 and I3, we also can't use these insns.  */
 
 	  if (i2_code_number >= 0 && i2set && i3set
-	      && (next_real_insn (i2) == i3
+	      && (next_nonnote_nondebug_insn (i2) == i3
 		  || ! reg_used_between_p (SET_DEST (i2set), i2, i3)))
 	    insn_code_number = recog_for_combine (&newi3pat, i3,
 						  &new_i3_notes);
@@ -3522,7 +3522,7 @@ try_combine (rtx i3, rtx i2, rtx i1, rtx
 	      || GET_MODE (*split) == VOIDmode
 	      || can_change_dest_mode (i2dest, added_sets_2,
 				       GET_MODE (*split)))
-	  && (next_real_insn (i2) == i3
+	  && (next_nonnote_nondebug_insn (i2) == i3
 	      || ! use_crosses_set_p (*split, DF_INSN_LUID (i2)))
 	  /* We can't overwrite I2DEST if its value is still used by
 	     NEWPAT.  */