[llvm] [LV][VPlan] Add initial support for CSA vectorization (PR #106560)

[Florian Hahn via llvm-commits]

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@@ -550,6 +560,10 @@ class LoopVectorizationLegality {
   void addInductionPhi(PHINode *Phi, const InductionDescriptor &ID,
                        SmallPtrSetImpl<Value *> &AllowedExit);
 
+  // Updates the vetorization state by adding \p Phi to the CSA list.
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fhahn wrote:

```suggestion
/// Updates the vetorization state by adding \p Phi to the CSA list.
```

https://github.com/llvm/llvm-project/pull/106560