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

[Florian Hahn 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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fhahn wrote:

if it is sunk outside, shouldn't it store the last lane of the last unrolled iteration? as is, it would generate incorrect code when interleaving with other users?

Or alternatively enforce that the operand are also defined outside any vector region?

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