[llvm] [LV][VPlan] Introduce VPScalarStore recipe to handle scalar stores in exit block. (PR #93148)

[Mel Chen via llvm-commits]

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@@ -1927,6 +1921,24 @@ void VPScalarCastRecipe ::print(raw_ostream &O, const Twine &Indent,
 }
 #endif
 
+void VPScalarStoreRecipe::execute(VPTransformState &State) {
+  IRBuilderBase &Builder = State.Builder;
+  Value *StoredVal = State.get(getStoredVal(), 0, /*IsScalar*/ true);
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Mel-Chen wrote:

ee8ce9f65a27313977403fd74f84292bac40d7ea
Check operands in the ::execute function. 
Initially, I attempted to check the operand in the constructor, but given the current application, the stored value is only correctly assigned in FixReduction.

https://github.com/llvm/llvm-project/pull/93148