[PATCH] D114071: [X86][Costmodel] `getReplicationShuffleCost()`: promote 1 bit-wide elements to 8 bit when have AVX512BW+AVX512VBMI

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: llvm/lib/Target/X86/X86TargetTransformInfo.cpp:3677
     }
     return bailout();
   default:
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AVX512F will use (pretty awful) vXi32 shuffles: https://simd.godbolt.org/z/YYzjaf7Wh


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D114071/new/

https://reviews.llvm.org/D114071