Rollback of r15267, r15263, r15193 in trunk branch in preparation for 3.19 branch

test/mjsunit/regress/regress-embedded-cons-string.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: --fold-constants --nodead-code-elimination
-// Flags: --expose-gc --allow-natives-syntax
-// Flags: --parallel-recompilation --parallel-recompilation-delay=300
-
-if (!%IsParallelRecompilationSupported()) {
-  print("Parallel recompilation is disabled. Skipping this test.");
-  quit();
-}
-
-function assertUnoptimized(fun) {
-  assertTrue(%GetOptimizationStatus(fun) != 1);
-}
-
-function test(fun) {
-  fun();
-  fun();
-  %OptimizeFunctionOnNextCall(fun, "parallel");
-  fun();  // Trigger optimization in the background.
-  gc();   // Tenure cons string.
-  assertUnoptimized(fun);      // Compilation not complete yet.
-  %CompleteOptimization(fun);  // Compilation embeds tenured cons string.
-  gc();   // Visit embedded cons string during mark compact.
-}
-
-function f() {
-  return "abcdefghijklmn" + "123456789";
-}
-
-function g() {
-  return "abcdefghijklmn\u2603" + "123456789";
-}
-
-function h() {
-  return "abcdefghijklmn\u2603" + "123456789\u2604";
-}
-
-test(f);
-test(g);
-test(h);