Bug 910782 - SpiderMonkey: Delete obsolete comments. r=jorendorff
Bug 910782 - SpiderMonkey: Simply uses of BRANCH. r=luke
Bug 910782 - SpiderMonkey: Inline check_backedge, which is only used in one place. r=luke
Bug 910782 - SpiderMonkey: Remove the for(;;) surrounding the interpreter loop, as it isn't needed, and adjust indentation for consistency. r=luke
Bug 910782 - SpiderMonkey: Use jsbytecode instead of int for the switch mask variables, and name the magic opcode used to enable interrupts. r=luke
Bug 910782 - SpiderMonkey: Add an explicit scope aroud the InvokeState object's lifetime. r=luke