1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr47028.c b/gcc/testsuite/gcc.dg/pr47028.c
new file mode 100644
index 000000000..3f80ff1c5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr47028.c
@@ -0,0 +1,19 @@
+/* PR rtl-optimization/47028 */
+/* { dg-do run } */
+/* { dg-options "-O -foptimize-sibling-calls -fno-forward-propagate -fno-tree-copy-prop -fno-tree-dominator-opts" } */
+
+int
+fib (int n)
+{
+  if (n <= 1)
+    return 1;
+  return fib (n - 2) + fib (n - 1);
+}
+
+int
+main (void)
+{
+  if (fib (5) != 8)
+    __builtin_abort ();
+  return 0;
+}