Merged r11907 into 3.11 branch.

test/mjsunit/regress/regress-crbug-134055.js

 // Copyright 2012 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 array_fun() {
-  for (var i = 0; i < 2; i++) {
-    var a = [1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8];
-    var x = new Array();
-    x.fixed$length = true;
-    for (var j = 0; j < a.length; j++) {
-      x.push(a[j]);
-    }
-    for(var j = 0; j < x.length; j++) {
-      if (typeof x[j] != 'number') {
-        throw "foo";
-      }
-      x[j] = x[j];
-    }
-  }
+function crash(obj) {
+  return obj.foo;
 }
 
-try {
-  for (var i = 0; i < 10; ++i) {
-    array_fun();
+function base(number_of_properties) {
+  var result = new Array();
+  for (var i = 0; i < number_of_properties; i++) {
+    result["property" + i] = "value" + i;
   }
-  %OptimizeFunctionOnNextCall(array_fun);
-  for (var i = 0; i < 10; ++i) {
-    array_fun();
-  }
-} catch (e) {
-  assertUnreachable();
+  result.foo = number_of_properties;
+  return result;
 }
 
+var a = base(12);
+var b = base(13);
+var c = base(14);
+var d = base(15);
+
+crash(a);  // Premonomorphic.
+crash(a);
+crash(b);
+crash(c);
+crash(d);  // Polymorphic, degree 4.
+
+//Prepare ElementsKind transition map chain.
+var x = base(13);
+x[0] = "object";
+x = base(14);
+x[0] = "object";
+x = base(15);
+x[0] = "object";
+
+%OptimizeFunctionOnNextCall(crash);
+crash(a);