combine.c (reversed_comparison): Fix typo in last patch.

 	* combine.c (reversed_comparison): Fix typo in last patch.
	Check X for NULL.
 	(combine_reversed_comparison_code): Make static to follow
 	prototype declaration.

Co-Authored-By: Jan Hubicka <jh@suse.cz>

From-SVN: r38942

gcc/ChangeLog

+Fri Jan 12 12:08:12 MET 2001  Andreas Jaeger  <aj@suse.de>
+			      Jan Hubicka  <jh@suse.cz>
+
+ 	* combine.c (reversed_comparison): Fix typo in last patch.
+	Check X for NULL.
+ 	(combine_reversed_comparison_code): Make static to follow
+ 	prototype declaration.
+
 2001-01-12  Phil Edwards  <pme@sources.redhat.com>
 
 	* install.texi:  Remove misplaced duplicate entry.

gcc/combine.c

@@ -11123,7 +11123,7 @@ simplify_comparison (code, pop0, pop1)
 
 /* Like jump.c' reversed_comparison_code, but use combine infrastructure for
    searching backward.  */
-enum rtx_code
+static enum rtx_code
 combine_reversed_comparison_code (exp)
      rtx exp;
 {
@@ -11135,8 +11135,8 @@ combine_reversed_comparison_code (exp)
      return code1;
    /* Otherwise try and find where the condition codes were last set and
       use that.  */
-   x = get_last_value (XEXP (x, 0));
-   if (GET_CODE (x) != COMPARE)
+   x = get_last_value (XEXP (exp, 0));
+   if (!x || GET_CODE (x) != COMPARE)
      return UNKNOWN;
    return reversed_comparison_code_parts (GET_CODE (exp),
 					  XEXP (x, 0), XEXP (x, 1), NULL);