[llvm] [LV] Support EVL for partial reduction and VPExpressionRecipe. (PR #205741)

[Florian Hahn via llvm-commits]

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@@ -3541,7 +3565,7 @@ void VPExpressionRecipe::decompose() {
     LiveInPlaceholders[Idx]->replaceAllUsesWith(Op);
 
   replaceAllUsesWith(ExpressionRecipes.back());
-  ExpressionRecipes.clear();
+  return std::move(ExpressionRecipes);
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fhahn wrote:

after this, I think the recipe must be removed, because any access now will access invalid data?

https://github.com/llvm/llvm-project/pull/205741