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[X86] Remove stale comment. NFC.
It turns out 256bit V[SZ]EXT nodes are still generated by the new shuffle lowering, so this is here to stay! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231422 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -5902,7 +5902,6 @@ multiclass SS41I_pmovx_avx2_patterns<string OpcPrefix, string ExtTy, SDNode ExtO
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(!cast<I>(OpcPrefix#DQYrr) VR128:$src)>;
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// On AVX2, we also support 256bit inputs.
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// FIXME: remove these patterns when the old shuffle lowering goes away.
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def : Pat<(v16i16 (ExtOp (v32i8 VR256:$src))),
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(!cast<I>(OpcPrefix#BWYrr) (EXTRACT_SUBREG VR256:$src, sub_xmm))>;
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def : Pat<(v8i32 (ExtOp (v32i8 VR256:$src))),
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