Inline some more compare operations.

test/mjsunit/compare-known-objects.js

Index: test/mjsunit/compare-known-objects.js
diff --git a/test/mjsunit/compare-known-objects-slow.js b/test/mjsunit/compare-known-objects.js
similarity index 87%
copy from test/mjsunit/compare-known-objects-slow.js
copy to test/mjsunit/compare-known-objects.js
index afa198fcb352ea7f186a285146a61fd1ab70d51b..afffc07014f67312589a9b1ba46397b484ac0402 100644
--- a/test/mjsunit/compare-known-objects-slow.js
+++ b/test/mjsunit/compare-known-objects.js
@@ -50,9 +50,11 @@ function test(a, b) {
   assertFalse(eq_strict(a, b));
 }
 
-// Prepare two objects in slow mode that have the same map.
-var obj1 = %OptimizeObjectForAddingMultipleProperties({}, 1);
-var obj2 = %OptimizeObjectForAddingMultipleProperties({}, 1);
+function O(){};
+O.prototype.t = function() {}
+
+var obj1 = new O;
+var obj2 = new O;
 
 // Test original objects.
 assertTrue(%HaveSameMap(obj1, obj2));
@@ -60,10 +62,4 @@ test(obj1, obj2);
 
 // Test after adding property to first object.
 obj1.x = 1;
-assertTrue(%HaveSameMap(obj1, obj2));
-test(obj1, obj2);
-
-// Test after adding property to second object.
-obj2.y = 2;
-assertTrue(%HaveSameMap(obj1, obj2));
 test(obj1, obj2);