Introduce runtime function %OptimizeFunctionOnNextCall to manually trigger optimization.

test/mjsunit/compiler/array-length.js

Index: test/mjsunit/compiler/array-length.js
diff --git a/test/mjsunit/compiler/array-length.js b/test/mjsunit/compiler/array-length.js
index 126c7a0243007d5c1fd76f8da9c7c7d701d071ed..462a1e77392c517f6ea0c5ab7e6ef975e428006e 100644
--- a/test/mjsunit/compiler/array-length.js
+++ b/test/mjsunit/compiler/array-length.js
@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+// Flags: --allow-natives-syntax
+
 function ArrayLength(a) { return a.length; }
 
 function Test(a0, a2, a5) {
@@ -36,7 +38,12 @@ function Test(a0, a2, a5) {
 var a0 = [];
 var a2 = [1,2];
 var a5 = [1,2,3,4,5];
-for (var i = 0; i < 100000; i++) Test(a0, a2, a5);
+for (var i = 0; i < 5; i++) Test(a0, a2, a5);
+%OptimizeFunctionOnNextCall(ArrayLength);
+%OptimizeFunctionOnNextCall(Test);
+Test(a0, a2, a5);
 assertEquals("undefined", typeof(ArrayLength(0)));
-for (var i = 0; i < 100000; i++) Test(a0, a2, a5);
+for (var i = 0; i < 5; i++) Test(a0, a2, a5);
+%OptimizeFunctionOnNextCall(Test);
+Test(a0, a2, a5);
 assertEquals(4, ArrayLength("hest"));