--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/func-attr-1.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,23 @@
+/* Test that setting -Os in a function attribute works.  */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-rtl-bbro" } */
+
+extern void f1 ();
+extern int f2 ();
+
+__attribute__ ((__optimize__ ("O2")))
+void
+f3()
+{
+}
+
+__attribute__ ((__optimize__ ("-Os", "-falign-functions", "-falign-jumps", "-falign-labels", "-falign-loops", "-fno-inline-functions", "-foptimize-strlen")))
+int
+f4 () {
+  if (f2 () == 0) {
+    f1 ();
+  }
+  return 0;
+}
+
+/* { dg-final { scan-rtl-dump-not "Duplicated bb" "bbro" } } */