Introduce runtime function %OptimizeFunctionOnNextCall to manually trigger optimization.

test/mjsunit/const-eval-init.js

 // Copyright 2009 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
+
 // Test the handling of initialization of deleted const variables.
 // This only makes sense in local scopes since the declaration and
 // initialization of consts in the global scope happen at the same
 // time.
 
 function testIntroduceGlobal() {
   var source =
       // Deleting 'x' removes the local const property.
       "delete x;" +
       // Initialization turns into assignment to global 'x'.
@@ skipping 22 matching lines @@
 
 function testAssignmentArgument(x) {
   function local() {
     var source = "delete x; const x = 7; assertEquals(7, x)";
     eval(source);
   }
   local();
   assertEquals(7, x);
 }
 
-for (var i = 0; i < 10000; i++) {
+for (var i = 0; i < 5; i++) {
   testAssignmentArgument();
 }
+%OptimizeFunctionOnNextCall(testAssignmentArgument);
+testAssignmentArgument();
 assertEquals(6, x);
 
 __defineSetter__('x', function() { throw 42; });
 function testAssignGlobalThrows() {
   // Initialization turns into assignment to global 'x' which
   // throws an exception.
   var source = "delete x; const x = 8";
   eval(source);
 }
 
@@ skipping 21 matching lines @@
   var x = 12;
   function local() {
     var source = "delete x; const x = 13; assertEquals(13, x)";
     eval(source);
   }
   local();
   assertEquals(13, x);
 }
 
 testAssignSurroundingContextSlot();