diff --git a/gcc/testsuite/g++.dg/ext/frounding-math1.C b/gcc/testsuite/g++.dg/ext/frounding-math1.C
new file mode 100644
index 00000000000..ecc46fd6017
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/frounding-math1.C
@@ -0,0 +1,8 @@
+// PR c++/109359
+// { dg-additional-options -frounding-math }
+
+// For a while we were emitting two doubles (4 .long directives) as the value
+// of a float array; it should only be two .longs.
+
+// { dg-final { scan-assembler-times "long" 2 { target x86_64-*-* } } }
+float xs[] = {0.001914, 0.630539};