[PATCH] D48825: [DAGCombiner] Add EXTRACT_SUBVECTOR to SimplifyDemandedVectorElts

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: spatel, craig.topper, efriedma, lebedev.ri.

As discussed on PR37989, this patch adds EXTRACT_SUBVECTOR handling to TargetLowering::SimplifyDemandedVectorElts and calls it from DAGCombiner::visitEXTRACT_SUBVECTOR.


Repository:
  rL LLVM

https://reviews.llvm.org/D48825

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  lib/CodeGen/SelectionDAG/TargetLowering.cpp
  test/CodeGen/X86/avx-vperm2x128.ll
  test/CodeGen/X86/avx512-hadd-hsub.ll
  test/CodeGen/X86/oddshuffles.ll

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