Fix sharing of literal boilerplates for optimized code.

test/mjsunit/regress/regress-2193.js

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-// Test both the Harmony egal operator and it's function equivalent.
+// Flags: --allow-natives-syntax --cache-optimized-code
 
-function TestEgal(expected, x, y) {
-  // TODO(mstarzinger): Once we have the egal operator, we can test it here.
-  assertSame(expected, Object.is(x, y));
-}
-
-var test_set = [ {}, [], 1/0, -1/0, "s", 0, 0/-1, null, undefined ];
-print(test_set);
-for (var i = 0; i < test_set.length; i++) {
-  for (var j = 0; j < test_set.length; j++) {
-    if (i == j) {
-      assertSame(test_set[i], test_set[j]);
-      TestEgal(true, test_set[i], test_set[j]);
+function bozo() {};
+function MakeClosure() {
+  return function f(use_literals) {
+    if (use_literals) {
+      return [1,2,3,3,4,5,6,7,8,9,bozo];
     } else {
-      TestEgal(false, test_set[i], test_set[j]);
-      TestEgal(false, test_set[j], test_set[i]);
+      return 0;
     }
   }
 }
+
+// Create two closures that share the same literal boilerplates.
+var closure1 = MakeClosure();
+var closure2 = MakeClosure();
+var expected = [1,2,3,3,4,5,6,7,8,9,bozo];
+
+// Make sure we generate optimized code for the first closure after
+// warming it up properly so that the literals boilerplate is generated
+// and the optimized code uses CreateArrayLiteralShallow runtime call.
+assertEquals(0, closure1(false));
+assertEquals(expected, closure1(true));
+%OptimizeFunctionOnNextCall(closure1);
+assertEquals(expected, closure1(true));
+
+// Optimize the second closure, which should reuse the optimized code
+// from the first closure with the same literal boilerplates.
+assertEquals(0, closure2(false));
+%OptimizeFunctionOnNextCall(closure2);
+assertEquals(expected, closure2(true));