1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/jaeger/setPropTypeGuard.js b/js/src/jit-test/tests/jaeger/setPropTypeGuard.js
new file mode 100644
index 0000000000..3786fc88af
--- /dev/null
+++ b/js/src/jit-test/tests/jaeger/setPropTypeGuard.js
@@ -0,0 +1,23 @@
+
+/*
+ * Get a SETPROP site which is monitored (unknown lhs) and is repeatedly
+ * invoked on objects with the same shape but different types (and without
+ * triggering a recompile of the function). The SETPROP PIC needs a type guard
+ * when the object is being monitored.
+ */
+var x = {g:0};
+var y = {g:0,f:"fubar"};
+x.f = 10;
+
+function foo(x) {
+  for (var i = 0; i < 30; i++)
+    x.f = 10;
+}
+function access(x) {
+  return x.f + 10;
+}
+foo(Object.create({}));
+eval("foo(x)");
+assertEq(access(y), "fubar10");
+eval("foo(y)");
+assertEq(access(y), 20);