--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/builtin-assume-aligned-1.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,40 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -fdump-tree-optimized" } */
+
+void
+test1 (double *out1, double *out2, double *out3, double *in1,
+       double *in2, int len)
+{
+  int i;
+  double *__restrict o1 = __builtin_assume_aligned (out1, 16);
+  double *__restrict o2 = __builtin_assume_aligned (out2, 16);
+  double *__restrict o3 = __builtin_assume_aligned (out3, 16);
+  double *__restrict i1 = __builtin_assume_aligned (in1, 16);
+  double *__restrict i2 = __builtin_assume_aligned (in2, 16);
+  for (i = 0; i < len; ++i)
+    {
+      o1[i] = i1[i] * i2[i];
+      o2[i] = i1[i] + i2[i];
+      o3[i] = i1[i] - i2[i];
+    }
+}
+
+void
+test2 (double *out1, double *out2, double *out3, double *in1,
+       double *in2, int len)
+{
+  int i, align = 32, misalign = 16;
+  out1 = __builtin_assume_aligned (out1, align, misalign);
+  out2 = __builtin_assume_aligned (out2, align, 16);
+  out3 = __builtin_assume_aligned (out3, 32, misalign);
+  in1 = __builtin_assume_aligned (in1, 32, 16);
+  in2 = __builtin_assume_aligned (in2, 32, 0);
+  for (i = 0; i < len; ++i)
+    {
+      out1[i] = in1[i] * in2[i];
+      out2[i] = in1[i] + in2[i];
+      out3[i] = in1[i] - in2[i];
+    }
+}
+
+/* { dg-final { scan-tree-dump-not "__builtin_assume_aligned" "optimized" } } */