--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/vect/vect-fma-2.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-fdump-tree-optimized -fassociative-math -fno-trapping-math -fno-signed-zeros" } */
+
+#include "tree-vect.h"
+
+#define N (VECTOR_BITS * 11 / 64 + 3)
+
+double
+dot_prod (double *x, double *y)
+{
+  double sum = 0;
+  for (int i = 0; i < N; ++i)
+    sum += x[i] * y[i];
+  return sum;
+}
+
+/* { dg-final { scan-tree-dump { = \.COND_FMA } "optimized" { target { vect_double && { vect_fully_masked && scalar_all_fma } } } } } */