c-typeck.c (warn_for_assignment): Don't print argument number, if zero.

	* c-typeck.c (warn_for_assignment): Don't print argument number, if zero.
	Fixes gcc.dg/warn-1.c.

From-SVN: r58550

gcc/ChangeLog

+2002-10-25  Mike Stump  <mrs@apple.com>
+
+	* c-typeck.c (warn_for_assignment): Don't print argument number, if zero.
+
 Sat Oct 26 01:44:46 CEST 2002  Jan Hubicka  <jh@suse.cz>
 
 	* toplev.c (dump_file_index): Add DFI_ce3.

gcc/c-typeck.c

@@ -4309,7 +4309,8 @@ c_convert_parm_for_inlining (parm, value, fn)
 
 /* Print a warning using MSGID.
    It gets OPNAME as its one parameter.
-   If OPNAME is null, it is replaced by "passing arg ARGNUM of `FUNCTION'".
+   if OPNAME is null and ARGNUM is 0, it is replaced by "passing arg of `FUNCTION'".
+   Otherwise if OPNAME is null, it is replaced by "passing arg ARGNUM of `FUNCTION'".
    FUNCTION and ARGNUM are handled specially if we are building an
    Objective-C selector.  */
 
@@ -4330,7 +4331,27 @@ warn_for_assignment (msgid, opname, function, argnum)
 	  function = selector;
 	  argnum -= 2;
 	}
-      if (function)
+      if (argnum == 0)
+	{
+	  if (function)
+	    {	    
+	      /* Function name is known; supply it.  */
+	      const char *const argstring = _("passing arg of `%s'");
+	      new_opname = (char *) alloca (IDENTIFIER_LENGTH (function)
+					    + strlen (argstring) + 1
+					    + 1);
+	      sprintf (new_opname, argstring,
+		       IDENTIFIER_POINTER (function));
+	    }
+	  else
+	    {
+	      /* Function name unknown (call through ptr).  */
+	      const char *const argnofun = _("passing arg of pointer to function");
+	      new_opname = (char *) alloca (strlen (argnofun) + 1 + 1);
+	      sprintf (new_opname, argnofun);
+	    }
+	}
+      else if (function)
 	{
 	  /* Function name is known; supply it.  */
 	  const char *const argstring = _("passing arg %d of `%s'");