JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / tests / stress / elide-new-object-dag-then-exit.js

diff --git a/tests/stress/elide-new-object-dag-then-exit.js b/tests/stress/elide-new-object-dag-then-exit.js
new file mode 100644 (file)
index 0000000..fbe99a5
--- /dev/null
+++ b/tests/stress/elide-new-object-dag-then-exit.js
@@ -0,0 +1,43 @@
+function sumOfArithSeries(limit) {
+    return limit * (limit + 1) / 2;
+}
+
+var n = 10000000;
+
+function bar() { }
+
+function verify(q, i) {
+    if (q.f == q.g)
+        throw "Error: q.f == q.g";
+    if (q.f.f != q.g.f)
+        throw "Error: q.f.f != q.g.f";
+    if (q.f.f.f != i)
+        throw "Error: q.f.f.f != i";
+}
+
+function foo() {
+    var result = 0;
+    for (var i = 0; i < n; ++i) {
+        var leaf = {f:i};
+        var o = {f:leaf};
+        var p = {f:leaf};
+        var q = {f:o, g:p};
+        result += q.f.f.f;
+        if (i >= n - 100) {
+            // We want the materialization to happen in the exit. So, before calling the thing that
+            // causes the materialization, we call bar(). We've never profiled this call at the time
+            // of FTL compilation, so this should be an exit.
+            bar();
+            verify(q, i);
+        }
+    }
+    return result;
+}
+
+noInline(foo);
+noInline(verify);
+noInline(bar);
+
+var result = foo();
+if (result != sumOfArithSeries(n - 1))
+    throw "Error: bad result: " + result;