Merged r17569 into 3.22 branch.

test/mjsunit/regress/regress-2987.js

 // Copyright 2013 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: --use-osr
+// Flags: --allow-natives-syntax --dead-code-elimination
 
-function f1(x) {
-  while (x > 0) {
-    x--;
-  }
-  return x;
+// This tests that stores on captured objects are correctly tracked even
+// when DCE is enabled. We cannot delete simulations of captured objects
+// that are still needed to replay the environment correctly.
+
+function constructor() {
+  this.x = 0;
 }
 
-assertEquals(0, f1(1));
-assertEquals(0, f1(10000000));
-
-function f2(x) {
-  var sum = 1;
-  while (x > 0) {
-    x--;
-    sum++;
+var deopt = { deopt:false };
+function boogeyman(mode, value) {
+  var object = new constructor();
+  if (mode) {
+    object.x = 1;
+  } else {
+    object.x = 2;
   }
-  return sum;
+  deopt.deopt;
+  assertEquals(value, object.x);
 }
 
-assertEquals(2, f2(1));
-assertEquals(10000001, f2(10000000));
+boogeyman(true, 1);
+boogeyman(true, 1);
+boogeyman(false, 2);
+boogeyman(false, 2);
+%OptimizeFunctionOnNextCall(boogeyman);
+boogeyman(false, 2);
+delete deopt.deopt;
+boogeyman(false, 2);