[PATCH] D14261: [X86][SSE] Recursive search for zeroable shuffle elements

[Simon Pilgrim via llvm-commits]

RKSimon added a comment.

It needs redoing (and reducing in scope) now that more of the target shuffle combine work is completed. We should be able to reduce it to a test for zero on BUILD_VECTORs with different number of elements to the mask (same as to what has been done in setTargetShuffleZeroElements).

It just hasn't been high enough on my todo list......


Repository:
  rL LLVM

http://reviews.llvm.org/D14261