1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/torture/pr81365.C b/gcc/testsuite/g++.dg/torture/pr81365.C
new file mode 100644
index 00000000000..fde5e503df9
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr81365.C
@@ -0,0 +1,39 @@
+// PR tree-optimization/81365
+// { dg-do run }
+
+struct A { unsigned a; };
+
+struct B {
+  B (const A *x)
+  {
+    __builtin_memcpy (b, x, 3 * sizeof (A));
+    __builtin_memcpy (c, x + 3, sizeof (A));
+    __builtin_memset (c + 1, 0, sizeof (A));
+  }
+  bool
+  foo (unsigned x)
+  {
+    A *it = c;
+    if (it->a == x || (++it)->a == x)
+      {
+	A t(b[0]);
+	b[0] = *it;
+	*it = t;
+	return true;
+      }
+    return false;
+  }
+  A b[3];
+  A c[2];
+};
+
+int
+main ()
+{
+  A x[] = { 4, 8, 12, 18 };
+  B y(x);
+  if (!y.foo (18))
+    __builtin_abort ();
+  if (!y.foo (4))
+    __builtin_abort ();
+}