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

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h,cpp -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlan.h llvm/lib/Transforms/Vectorize/VPlanEVLTailFolding.cpp llvm/lib/Transforms/Vectorize/VPlanLowering.cpp llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp --diff_from_common_commit
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanEVLTailFolding.cpp b/llvm/lib/Transforms/Vectorize/VPlanEVLTailFolding.cpp
index 36d6f7948..b3fc846aa 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanEVLTailFolding.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanEVLTailFolding.cpp
@@ -268,7 +268,8 @@ static bool optimizeExpressionRecipeToEVL(VPValue *HeaderMask,
   ExpressionRecipes.back()->replaceAllUsesWith(NewExpr);
   NewExpr->insertBefore(Expr);
   Expr->eraseFromParent();
-  // Need to delete HeaderMask explicitly if the expression recipe is its only user.
+  // Need to delete HeaderMask explicitly if the expression recipe is its only
+  // user.
   vputils::recursivelyDeleteDeadRecipes(HeaderMask);
   return true;
 }

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