1 files changed, 64 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/getter-setter-guards1.js b/js/src/jit-test/tests/cacheir/getter-setter-guards1.js
new file mode 100644
index 0000000000..9ca64dd7da
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/getter-setter-guards1.js
@@ -0,0 +1,64 @@
+// Objects with same shape but different getter/setter.
+function testOwnProp() {
+  var count = 0;
+  var objects = [{get x() { count += 1; }, set x(v) { count += 2; }},
+                 {get x() { count += 3; }, set x(v) { count += 4; }},
+                 {get x() { count += 5; }, set x(v) { count += 6; }}];
+  assertEq(shapeOf(objects[0]), shapeOf(objects[1]));
+  assertEq(shapeOf(objects[0]), shapeOf(objects[2]));
+  for (var i = 0; i < 150; i++) {
+    var o = objects[i % objects.length];
+    o.x++;
+  }
+  assertEq(count, 1050);
+}
+testOwnProp();
+
+// Ensure optimized TypedArray length properly deoptimizes when the getter is
+// redefined.
+function testTypedArrayLength() {
+  var ta = new Int32Array(10);
+  var lengthHolder = Object.getPrototypeOf(Int32Array.prototype);
+  for (var i = 0; i < 150; i++) {
+    assertEq(ta.length, i <= 100 ? 10 : (i <= 130 ? "foo" : "bar"));
+    assertEq(ta.byteLength, 40);
+    assertEq(ta.byteOffset, 0);
+    if (i === 100) {
+      var desc = Object.getOwnPropertyDescriptor(lengthHolder, "length");
+      desc.get = () => "foo";
+      Object.defineProperty(lengthHolder, "length", desc);
+    }
+    if (i === 130) {
+      var desc = Object.getOwnPropertyDescriptor(lengthHolder, "length");
+      desc.get = () => "bar";
+      Object.defineProperty(lengthHolder, "length", desc);
+    }
+  }
+}
+testTypedArrayLength();
+
+// Native accessors on the global object. Redefine a few times and ensure the
+// right function is called. Use |useWindowProxy: false| to allow optimizing all
+// native getters.
+function testGlobalProp() {
+  var g = newGlobal({useWindowProxy: false});
+  g.evaluate("" + function test() {
+    var arr = [Math, Object];
+    var expected = 0;
+    for (var i = 0; i < 150; i++) {
+      assertEq(timesAccessed, i <= 100 ? i + 1 : (i > 130 ? Infinity : NaN));
+      if (i === 100) {
+        var desc = Object.getOwnPropertyDescriptor(this, "timesAccessed");
+        desc.get = Math.abs;
+        Object.defineProperty(this, "timesAccessed", desc);
+      }
+      if (i === 130) {
+        var desc = Object.getOwnPropertyDescriptor(this, "timesAccessed");
+        desc.get = Math.min;
+        Object.defineProperty(this, "timesAccessed", desc);
+      }
+    }
+  });
+  g.evaluate("test()");
+}
+testGlobalProp();