[PATCH] D44942: [X86][SSE] Don't bother re-adding combined target shuffles to the work list

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: craig.topper, andreadb, spatel, zvi.

We are re-adding all the bitcasts, constant masks and target shuffles to the work list for no apparent gain.

Found while investigating adding SimplifyDemandedVectorElts to target shuffles.


Repository:
  rL LLVM

https://reviews.llvm.org/D44942

Files:
  lib/Target/X86/X86ISelLowering.cpp

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