Bug 891070 - IonMonkey: Minor cleanups for lsh range analysis: fix a -Wsign-compare warning, and use a 32-bit shift instead of a 64-bit shift. r=nbp
Bug 891070 - IonMonkey: Reimplement MUrsh::canOverflow using range information. r=nbp
Bug 891070 - IonMonkey: RangeAnalysis simplifications. r=nbp