1 files changed, 62 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/is-constructing.js b/js/src/jit-test/tests/ion/is-constructing.js
new file mode 100644
index 0000000000..fc8abcbae4
--- /dev/null
+++ b/js/src/jit-test/tests/ion/is-constructing.js
@@ -0,0 +1,62 @@
+var isConstructing = getSelfHostedValue("_IsConstructing");
+
+function testBasic() {
+    var f = function(expected) {
+	with(this) {}; // Don't inline.
+	assertEq(isConstructing(), expected);
+    };
+    for (var i=0; i<40; i++) {
+	f(false);
+	new f(true);
+    }
+}
+testBasic();
+
+function testGeneric() {
+    var f1 = function(expected) {
+	with(this) {};
+	assertEq(isConstructing(), expected);
+    };
+    var f2 = function(expected) {
+	assertEq(isConstructing(), expected);
+    }
+    var funs = [f1, f2];
+    for (var i=0; i<40; i++) {
+	var f = funs[i % 2];
+	f(false);
+	new f(true);
+    }
+}
+testGeneric();
+
+function testArgsRectifier() {
+    var f = function(x) {
+	with(this) {};
+	assertEq(isConstructing(), true);
+    };
+    for (var i=0; i<40; i++)
+	new f();
+}
+testArgsRectifier();
+
+function testBailout() {
+    var f1 = function(x, expected) {
+	if (x > 20) {
+	    bailout();
+	    assertEq(isConstructing(), expected);
+	}
+    };
+    var f2 = function(x) {
+	return new f1(x, true);
+    };
+    var f3 = function(x) {
+	return f1(x, false);
+    };
+    for (var i=0; i<40; i++) {
+	f2(i);
+	f3(i);
+    }
+    for (var i=0; i<40; i++)
+	f1(i, false);
+}
+testBailout();