[llvm] [LV][VPlan] Add initial support for CSA vectorization (PR #121222)

[Florian Hahn via llvm-commits]

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@@ -2535,6 +2535,11 @@ bool RISCVTTIImpl::isLegalMaskedExpandLoad(Type *DataTy, Align Alignment) {
   return true;
 }
 
+bool RISCVTTIImpl::enableConditionalScalarAssignmentVectorization() const {
+  return ST->hasVInstructions() &&
+         ST->getProcFamily() == RISCVSubtarget::SiFive7;
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fhahn wrote:

It would be great to not limit this to a single processor family. IIUC there's nothing target-specific about the feature and the cost model should ideally accurately compute the cost, without needing a separate TTI hook?

https://github.com/llvm/llvm-project/pull/121222