[PATCH] [ARM] Do not select SMULW[BT] or SMLAW[BT]

[Renato Golin]

Hi Oliver,

I'm assuming you're going to be working on it in the near future, right? I agree this pattern is unlikely to make any performance regressions for the time being, though.

cheers,
--renato

http://reviews.llvm.org/D5824