[llvm] [WebAssembly] v8i8 mul support (PR #151145)

[Derek Schuff via llvm-commits]

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@@ -3535,31 +3535,50 @@ static SDValue performMulCombine(SDNode *N,
   // We don't natively support v16i8 mul, but we do support v8i16 so split the
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dschuff wrote:

Update the comment?

https://github.com/llvm/llvm-project/pull/151145