1 files changed, 13 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/fold-needless-control-flow.js b/js/src/jit-test/tests/ion/fold-needless-control-flow.js
new file mode 100644
index 0000000000..7f5b461d43
--- /dev/null
+++ b/js/src/jit-test/tests/ion/fold-needless-control-flow.js
@@ -0,0 +1,13 @@
+function test(str, needle) {
+  // We should be able to fold away the complete indexOf instruction, because
+  // executing the right-hand side of the && operator is a no-op.
+  (str.indexOf(needle) > -1) && needle;
+}
+
+const needles = [
+  "a", "b",
+];
+
+for (let i = 0; i < 100; ++i) {
+  test("aaa", needles[i & 1]);
+}