1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr40971.c b/gcc/testsuite/gcc.dg/pr40971.c
new file mode 100644
index 000000000..31dfd5e13
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr40971.c
@@ -0,0 +1,23 @@
+/* PR target/40971 */
+/* { dg-do compile } */
+/* { dg-options "-O -fstack-protector -fno-strict-aliasing" } */
+/* { dg-require-effective-target fstack_protector } */
+
+extern void bar (char *);
+
+void
+foo (int f, long a)
+{
+  {
+    char d[32768];
+    bar (d);
+  }
+  double b = f;
+  while (a)
+    {
+      char c[sizeof (double)];
+      __builtin_memcpy (c, &b, sizeof (c));
+      if (*(double *) c != 2.0)
+	break;
+    }
+}