function.c (assign_parms): Set last_named only for last named argument.

	* function.c (assign_parms): Set last_named only for last named
	argument.

	* g++.dg/other/stdarg1.C: New test.

From-SVN: r47601

gcc/ChangeLog

+2001-12-04  Jakub Jelinek  <jakub@redhat.com>
+
+	* function.c (assign_parms): Set last_named only for last named
+	argument.
+
 2001-12-04  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* doc/install.texi: Use the GFDL.  Include years from old install

gcc/function.c

@@ -4307,16 +4307,25 @@ assign_parms (fndecl)
       tree passed_type = DECL_ARG_TYPE (parm);
       tree nominal_type = TREE_TYPE (parm);
       int pretend_named;
+      int last_named = 0, named_arg;
 
-      /* Set LAST_NAMED if this is last named arg before some
+      /* Set LAST_NAMED if this is last named arg before last
 	 anonymous args.  */
-      int last_named = ((TREE_CHAIN (parm) == 0
-			 || DECL_NAME (TREE_CHAIN (parm)) == 0)
-			&& (stdarg || current_function_varargs));
+      if (stdarg || current_function_varargs)
+	{
+	  tree tem;
+
+	  for (tem = TREE_CHAIN (parm); tem; tem = TREE_CHAIN (tem))
+	    if (DECL_NAME (tem))
+	      break;
+
+	  if (tem == 0)
+	    last_named = 1;
+	}
       /* Set NAMED_ARG if this arg should be treated as a named arg.  For
 	 most machines, if this is a varargs/stdarg function, then we treat
 	 the last named arg as if it were anonymous too.  */
-      int named_arg = STRICT_ARGUMENT_NAMING ? 1 : ! last_named;
+      named_arg = STRICT_ARGUMENT_NAMING ? 1 : ! last_named;
 
       if (TREE_TYPE (parm) == error_mark_node
 	  /* This can happen after weird syntax errors

gcc/testsuite/ChangeLog

+2001-12-04  Jakub Jelinek  <jakub@redhat.com>
+
+	* g++.dg/other/stdarg1.C: New test.
+
 2001-12-03  Janis Johnson  <janis187@us.ibm.com>
 
 	* gcc.c-torture/execute/builtin-prefetch-1.c: New test.

gcc/testsuite/g++.dg/other/stdarg1.C

+// Test stdarg function with anonymous argument
+// { dg-do run }
+
+#include <stdarg.h>
+
+extern "C" void abort (void);
+
+void baz (va_list list)
+{
+  if (va_arg (list, long) != 3)
+    abort ();
+}
+
+void foo (long p1, long, long p2, ...)
+{
+  va_list list;
+  va_start (list, p2);
+  baz (list);
+  va_end (list);
+}
+
+int main ()
+{
+  foo (0, 1, 2, 3);
+  return 0;
+}