fix compilation on AUTO_INC_DEC targets

fix compilation on AUTO_INC_DEC targets
	* combine.c (combine_instructions) [AUTO_INC_DEC]: Declare links
	as an rtx.
	(try_combine) [AUTO_INC_DEC]: Declare a local link rtx.

From-SVN: r171995

gcc/ChangeLog

+2011-04-05  Nathan Froyd  <froydnj@codesourcery.com>
+
+	* combine.c (combine_instructions) [AUTO_INC_DEC]: Declare links
+	as an rtx.
+	(try_combine) [AUTO_INC_DEC]: Declare a local link rtx.
+
 2011-04-05  Steven Bosscher  <steven@gcc.gnu.org>
 
 	PR middle-end/48441

gcc/combine.c

@@ -1139,6 +1139,8 @@ combine_instructions (rtx f, unsigned int nregs)
       FOR_BB_INSNS (this_basic_block, insn)
         if (INSN_P (insn) && BLOCK_FOR_INSN (insn))
 	  {
+            rtx links;
+
             subst_low_luid = DF_INSN_LUID (insn);
             subst_insn = insn;
 
@@ -2911,15 +2913,18 @@ try_combine (rtx i3, rtx i2, rtx i1, rtx i0, int *new_direct_jump_p)
     /* It's not the exception.  */
 #endif
 #ifdef AUTO_INC_DEC
-    for (link = REG_NOTES (i3); link; link = XEXP (link, 1))
-      if (REG_NOTE_KIND (link) == REG_INC
-	  && (reg_overlap_mentioned_p (XEXP (link, 0), PATTERN (i2))
-	      || (i1 != 0
-		  && reg_overlap_mentioned_p (XEXP (link, 0), PATTERN (i1)))))
-	{
-	  undo_all ();
-	  return 0;
-	}
+    {
+      rtx link;
+      for (link = REG_NOTES (i3); link; link = XEXP (link, 1))
+	if (REG_NOTE_KIND (link) == REG_INC
+	    && (reg_overlap_mentioned_p (XEXP (link, 0), PATTERN (i2))
+		|| (i1 != 0
+		    && reg_overlap_mentioned_p (XEXP (link, 0), PATTERN (i1)))))
+	  {
+	    undo_all ();
+	    return 0;
+	  }
+    }
 #endif
 
   /* See if the SETs in I1 or I2 need to be kept around in the merged