--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/dfp/loop-index.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,57 @@
+/* C99 6.8.5.2: The for statement.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "dfp-dbg.h"
+
+void
+f32 (void)
+{
+  _Decimal32 d;
+  int i;
+
+  for (d = 1.1df, i=0; d <= 1.5df; d += 0.1df)
+    i++;
+
+  if (i != 5)
+    FAILURE
+}
+
+void
+f64 (void)
+{
+  _Decimal64 d;
+  int i;
+
+  for (d = 1.1dd, i=0; d <= 1.5dd; d += 0.1dd)
+    i++;
+
+  if (i != 5)
+    FAILURE
+}
+
+void
+f128 (void)
+{
+  _Decimal128 d;
+  int i;
+
+  for (d = 1.1dl, i=0; d <= 1.5dl; d += 0.1dl)
+    i++;
+
+  if (i != 5)
+    FAILURE
+}
+
+int
+main ()
+{
+  int i;
+
+  f32 ();
+  f64 ();
+  f128 ();
+  
+  FINISH
+  return (0);
+}