Reapply load ICs for nonexistent properties....

test/mjsunit/regress/regress-675.js

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+
+// Regression test for http://code.google.com/p/v8/issues/detail?id=675.
+//
+// Test that load ICs for nonexistent properties check global
+// property cells.
+
+function f() { return this.x; }
+
+// Initialize IC for nonexistent x property on global object.
+f();
+f();
+
+// Assign to global property cell for x.
+this.x = 23;
+
+// Check that we bail out from the IC.
+assertEquals(23, f());
+
+
+// Same test, but test that the global property cell is also checked
+// if the global object is the last object in the prototype chain for
+// the load.
+this.__proto__ = null;
+function g() { return this.y; }
+
+// Initialize IC.
+g();
+g();
+
+// Update global property cell.
+this.y = 42;
+
+// Check that IC bails out.
+assertEquals(42, g());
+