[PATCH] D48936: [X86][SSE] Prefer BLEND(SHL(v, c1), SHL(v, c2)) over MUL(v, c3)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon planned changes to this revision.
RKSimon added a comment.

Dammit, just realised that pre-SSE41 targets might introduce AND/ANDN/OR blend masks which will even more costly - I'll see if there is a better way to do this


Repository:
  rL LLVM

https://reviews.llvm.org/D48936