tm.texi (INIT_CUMULATIVE_ARGS): Update doco.

[thirdparty/gcc.git] / gcc / doc / tm.texi

diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 46c0b650be8f2aa07eb2a2bc6fc1c3e0ecba281f..dc6953a09357a742c6faca4a8e76ff72620907bd 100644 (file)
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -3725,7 +3725,7 @@ arguments are passed on the stack, there is no need to store anything in
 should not be empty, so use @code{int}.
 @end defmac
 
-@defmac INIT_CUMULATIVE_ARGS (@var{cum}, @var{fntype}, @var{libname}, @var{fndecl})
+@defmac INIT_CUMULATIVE_ARGS (@var{cum}, @var{fntype}, @var{libname}, @var{fndecl}, @var{n_named_args})
 A C statement (sans semicolon) for initializing the variable
 @var{cum} for the state at the beginning of the argument list.  The
 variable has type @code{CUMULATIVE_ARGS}.  The value of @var{fntype}
@@ -3734,7 +3734,10 @@ the args, or 0 if the args are to a compiler support library function.
 For direct calls that are not libcalls, @var{fndecl} contain the
 declaration node of the function.  @var{fndecl} is also set when
 @code{INIT_CUMULATIVE_ARGS} is used to find arguments for the function
-being compiled.
+being compiled.  @var{n_named_args} is set to the number of named
+arguments, including a structure return address if it is passed as a
+parameter, when making a call.  When processing incoming arguments,
+@var{n_named_args} is set to -1.
 
 When processing a call to a compiler support library function,
 @var{libname} identifies which one.  It is a @code{symbol_ref} rtx which