tm.texi (FUNCTION_ARG): Document that the last call is special.

	* doc/tm.texi (FUNCTION_ARG): Document that the last call
	is special.

From-SVN: r43681

gcc/ChangeLog

+2001-07-01  Geoffrey Keating  <geoffk@redhat.com>
+
+	* doc/tm.texi (FUNCTION_ARG): Document that the last call
+	is special.
+
 2001-07-01  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* tlink.c (recompile_files): Remove COMPILER_PATH and

gcc/doc/tm.texi

@@ -3215,6 +3215,10 @@ As a special exception the first @code{expr_list} in the @code{parallel}
 RTX may have a first operand of zero.  This indicates that the entire
 argument is also stored on the stack.
 
+The last time this macro is called, it is called with @code{MODE ==
+VOIDmode}, and its result is passed to the @code{call} or @code{call_value}
+pattern as operands 2 and 3 respectively.
+
 @cindex @file{stdarg.h} and register arguments
 The usual way to make the ISO library @file{stdarg.h} work on a machine
 where some arguments are usually passed in registers, is to cause