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

[Florian Hahn via llvm-commits]

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@@ -231,6 +231,53 @@ class VPLane {
   }
 };
 
+class VPInstruction;
+class VPCSAHeaderPHIRecipe;
+class VPCSADataUpdateRecipe;
+class VPCSAExtractScalarRecipe;
+
+/// VPCSAState holds information required to vectorize a conditional scalar
+/// assignment.
+class VPCSAState {
+  VPValue *VPInitScalar = nullptr;
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fhahn wrote:

Would be  good to avoid holding references to VPValues/Recipes, as they may be removed/replaced, in case the state here gets stale.

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