Bug 866866 - Inspect phis at the start of loop header rather than trailing values, r=dvander.
Bug 866765 - Refactor compilation of JSOP_SETELEM to only pop operands at one point, r=dvander.
Bug 865960 - JS OOM should throw instead of silently stopping execution (r=billm)

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extra : rebase_source : 39eb34b736e142bb40b68ec25f335ed6283a1570