Introduce runtime function %OptimizeFunctionOnNextCall to manually trigger optimization.

test/mjsunit/compiler/pic.js

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (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 GetX(o) { return o.x; }
 function CallF(o) { return o.f(); }
 function SetX(o) { o.x = 42; }
 function SetXY(o,y) { return o.x = y; }
 
 
 function Test(o) {
   SetX(o);
   assertEquals(42, GetX(o));
   assertEquals(87, SetXY(o, 87));
   assertEquals(87, GetX(o));
   assertTrue(SetXY(o, o) === o);
   assertTrue(o === GetX(o), "o === GetX(o)");
   assertEquals("hest", SetXY(o, "hest"));
   assertEquals("hest", GetX(o));
   assertTrue(SetXY(o, Test) === Test);
   assertTrue(Test === GetX(o), "Test === GetX(o)");
   assertEquals(99, CallF(o));
 }
 
 // Create a bunch of objects with different layouts.
 var o1 = { x: 0, y: 1 };
 var o2 = { y: 1, x: 0 };
 var o3 = { y: 1, z: 2, x: 0 };
 o1.f = o2.f = o3.f = function() { return 99; }
 
 // Run the test until we're fairly sure we've optimized the
 // polymorphic property access.
-for (var i = 0; i < 100000; i++) {
+for (var i = 0; i < 5; i++) {
   Test(o1);
   Test(o2);
   Test(o3);
 }
+%OptimizeFunctionOnNextCall(Test);
+Test(o1);
+Test(o2);
+Test(o3);
 
 // Make sure that the following doesn't crash.
 GetX(0);
 SetX(0);
 SetXY(0, 0);
 assertThrows("CallF(0)", TypeError);