Support for post-fix count operations (x++, x--) where x is a global...

test/mjsunit/compiler/globals.js

 // Copyright 2009 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
@@ skipping 35 matching lines @@
 // Test a load.
 assertEquals("2", eval('g'));
 
 // Test that patching the IC in the compiled code works.
 assertEquals("2", eval('g'));
 assertEquals("2", eval('g'));
 
 // Test a second load.
 g = 3;
 assertEquals(3, eval('g'));
+
+// Test postfix count operation
+var t;
+t = g++;
+assertEquals(3, t);
+assertEquals(4, g);
+
+code = "g--; 1";
+assertEquals(1, eval(code));
+assertEquals(3, g);