Bug 117719 does not depend on any bugs.

Bug 117719 blocks 6 bugs:

•    117719: FTL: Add another temp register regT4 to JSInterfaceJIT [RESOLVED FIXED; assigned to msaboff]
  •    116888: JSC Should use the C Stack for JIT code [RESOLVED FIXED; assigned to msaboff]
    •    113621: FTL should force LLVM to use our calling convention [RESOLVED FIXED; assigned to fpizlo]
      •    112840: Use LLVM as a backend for the fourth-tier DFG JIT (a.k.a. the FTL JIT) [RESOLVED FIXED; assigned to fpizlo]
        •    132356: Continue to expand FTL JIT coverage [NEW; assigned to fpizlo]
        •    112836: JSC should be a quadruple-tier VM [RESOLVED FIXED; assigned to fpizlo]
  •    117102: fourthTier: Arity fixup should be done while on same stack [RESOLVED FIXED; assigned to msaboff]
    •    116888: JSC Should use the C Stack for JIT code [RESOLVED FIXED; assigned to msaboff] (*)