1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/20181025-1.C b/gcc/testsuite/g++.dg/opt/20181025-1.C
new file mode 100644
index 00000000000..43d1614f023
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/20181025-1.C
@@ -0,0 +1,31 @@
+// { dg-do compile }
+// { dg-options "-Ofast" }
+
+template <typename Number>
+class Vector {
+    typedef Number value_type;
+    typedef const value_type *const_iterator;
+    Number norm_sqr () const;
+    const_iterator begin () const;
+    unsigned int dim;
+};
+template <typename Number>
+static inline Number
+local_sqr (const Number x)
+{
+  return x*x;
+}
+template <typename Number>
+Number
+Vector<Number>::norm_sqr () const
+{
+  Number sum0 = 0, sum1 = 0, sum2 = 0, sum3 = 0;
+  const_iterator ptr = begin(), eptr = ptr + (dim/4)*4;
+  while (ptr!=eptr) 
+    {
+      sum0 += ::local_sqr(*ptr++);
+      sum1 += ::local_sqr(*ptr++);
+    }
+  return sum0+sum1+sum2+sum3;
+}
+template class Vector<double>;