llvm dev - Oct 2021 - how to widen vector in target defined intrinsics

Hello Developers,
    I add an Intrinsic in my target called int_npp_veltadd
using llvm-11.0.0,  
&nbsp; &nbsp; Its declaration is <64 x i8&gt;
@llvm.nnp.veltadd(<64 x i8&gt; %a,&nbsp;<64 x i8&gt; %b,
<64 x i8&gt; %c, <64 x i8&gt; %d).
&nbsp; &nbsp;&nbsp;
&nbsp; &nbsp; But when the input is <28 x i8&gt;, my backend get
an error in&nbsp;LegalizeVectorTypes.cpp line 2733, it says "Do not
know how to widen the result of this operator!". &nbsp;Because of the
vector&nbsp;<28 x i8&gt; is extended, &nbsp;the
function&nbsp;TLI.getOperationAction return EXPAND. So the
target's&nbsp;ReplaceNodeResults cannot be called. so I cannot widen the
vector to 64 x i8 in my target.
&nbsp; how can&nbsp;I widen vector in this situation?
&nbsp; thanks a lot!~
Yao.Yu
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