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[X86][AVX] SimplifyDemandedVectorEltsForTargetNode - reduce width of X86ISD::VPERMIL2
authorSimon Pilgrim <llvm-dev@redking.me.uk>
Sat, 27 Jun 2020 14:06:49 +0000 (15:06 +0100)
committerSimon Pilgrim <llvm-dev@redking.me.uk>
Sat, 27 Jun 2020 14:06:49 +0000 (15:06 +0100)
commite855efe42407dd67f6a513927d0669cb7a66f448
tree75c26fe4f65801dce096309fe25c19c64abbfb25tree | snapshot
parentd56c6475a60aa44b040983fe4fd355399cc4c42dcommit | diff
[X86][AVX] SimplifyDemandedVectorEltsForTargetNode - reduce width of X86ISD::VPERMIL2

If we don't need the elements of the upper lanes, reduce the width of the X86ISD::VPERMIL2 node.
llvm/lib/Target/X86/X86ISelLowering.cpp diff | blob | history
llvm/test/CodeGen/X86/var-permute-256.ll diff | blob | history
external/llvm-project
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