Merged r15193, r15263, r15267 into trunk 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: --track-fields --track-double-fields --allow-natives-syntax
-// Flags: --parallel-recompilation --parallel-recompilation-delay=50
+// 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 new_object() {
-  var o = {};
-  o.a = 1;
-  o.b = 2;
-  return o;
+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 add_field(obj) {
-  obj.c = 3;
+function f() {
+  return "abcdefghijklmn" + "123456789";
 }
 
-add_field(new_object());
-add_field(new_object());
-%OptimizeFunctionOnNextCall(add_field, "parallel");
+function g() {
+  return "abcdefghijklmn\u2603" + "123456789";
+}
 
-var o = new_object();
-add_field(o);                      // Trigger optimization.
-assertUnoptimized(add_field);      // Not yet optimized.
-o.c = 2.2;                         // Invalidate transition map.
-%CompleteOptimization(add_field);  // Conclude optimization with...
-assertUnoptimized(add_field);      // ... bailing out due to map dependency.
+function h() {
+  return "abcdefghijklmn\u2603" + "123456789\u2604";
+}
 
+test(f);
+test(g);
+test(h);