Merged r11907 into 3.11 branch.

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

Index: test/mjsunit/regress/regress-crbug-134055.js
diff --git a/test/mjsunit/regress/regress-2170.js b/test/mjsunit/regress/regress-crbug-134055.js
similarity index 72%
copy from test/mjsunit/regress/regress-2170.js
copy to test/mjsunit/regress/regress-crbug-134055.js
index 01cb1eaf8f7b812429d4f36dee28b70f4af0b66d..9b658fb6f650f04520001f61f8e34d0202c5fb7d 100644
--- a/test/mjsunit/regress/regress-2170.js
+++ b/test/mjsunit/regress/regress-crbug-134055.js
@@ -27,32 +27,37 @@
 
 // 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();
-  }
-  %OptimizeFunctionOnNextCall(array_fun);
-  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;
   }
-} 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);