[PATCH] D16652: [X86][SSE] Find source of the inserted element of INSERTPS

[Simon Pilgrim via llvm-commits]

RKSimon added a comment.

Thanks Sanjay. I've added the isUndefOrZero helepr function - which can be used with target shuffle combines (but not lowering).


Repository:
  rL LLVM

http://reviews.llvm.org/D16652