Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 47 insertions, 0 deletions

diff --git a/js/src/tests/test262/language/expressions/call/tco-non-eval-function.js b/js/src/tests/test262/language/expressions/call/tco-non-eval-function.js
new file mode 100644
index 0000000000..1d704f4494
--- /dev/null
+++ b/js/src/tests/test262/language/expressions/call/tco-non-eval-function.js
@@ -0,0 +1,47 @@
+// |reftest| skip -- tail-call-optimization is not supported
+// Copyright (C) 2017 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-function-calls-runtime-semantics-evaluation
+description: >
+  Tail-call with identifier named "eval" in function environment.
+info: |
+  12.3.4.1 Runtime Semantics: Evaluation
+    ...
+    6. If Type(ref) is Reference and IsPropertyReference(ref) is false and
+       GetReferencedName(ref) is "eval", then
+      a. If SameValue(func, %eval%) is true, then
+        ...
+    ...
+    9. Return ? EvaluateCall(func, ref, arguments, tailCall).
+
+  12.3.4.2 Runtime Semantics: EvaluateCall( func, ref, arguments, tailPosition )
+    ...
+    7. If tailPosition is true, perform PrepareForTailCall().
+    8. Let result be Call(func, thisValue, argList).
+    ...
+
+flags: [noStrict]
+features: [tail-call-optimization]
+includes: [tcoHelper.js]
+---*/
+
+var callCount = 0;
+
+(function() {
+  function f(n) {
+    "use strict";
+    if (n === 0) {
+      callCount += 1
+      return;
+    }
+    return eval(n - 1);
+  }
+  var eval = f;
+  f($MAX_ITERATIONS);
+})();
+
+assert.sameValue(callCount, 1);
+
+reportCompare(0, 0);