rtlanal.c (rtx_unsable_p): ADDRESSOF is stable.

	* rtlanal.c (rtx_unsable_p): ADDRESSOF is stable.
	(no_labels_between_p): Short circuit case beg==end.

From-SVN: r42867

gcc/ChangeLog

+Mon Jun  4 20:15:25 CEST 2001  Jan Hubicka  <jh@suse.cz>
+
+	* rtlanal.c (rtx_unsable_p): ADDRESSOF is stable.
+	(no_labels_between_p): Short circuit case beg==end.
+
 Mon Jun  4 20:03:05 CEST 2001  Jan Hubicka  <jh@suse.cz>
 
 	* rtlanal.c (operand_preference): Fix preference for objects.

gcc/rtlanal.c

@@ -59,6 +59,7 @@ rtx_unstable_p (x)
     case QUEUED:
       return 1;
 
+    case ADDRESSOF:
     case CONST:
     case CONST_INT:
     case CONST_DOUBLE:
@@ -476,6 +477,8 @@ no_labels_between_p (beg, end)
      rtx beg, end;
 {
   register rtx p;
+  if (beg == end)
+    return 0;
   for (p = NEXT_INSN (beg); p != end; p = NEXT_INSN (p))
     if (GET_CODE (p) == CODE_LABEL)
       return 0;