1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr47391.c b/gcc/testsuite/gcc.dg/pr47391.c
new file mode 100644
index 00000000000..5ec98f10850
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr47391.c
@@ -0,0 +1,22 @@
+/* PR tree-optimization/47391 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+const volatile int v = 1;
+int i = 0;
+
+void
+foo (void)
+{
+  i = v;
+}
+
+int
+main (void)
+{
+  foo ();
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "i = 1;" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */