[PATCH] D20907: [IfConversion] Bugfix: don't add Undef flag on use if reg is live.

[Jonas Paulsson via llvm-commits]

jonpa added a comment.

A follow-up question here is if it is really such a good idea to just throw on extra implicit use-ops on the predicated MI? Wouldn't it generally make more sense in the case where a register is conditionally defined to model this as a tied use-operand?


http://reviews.llvm.org/D20907