[llvm] [VPlan] Introduce VPSingleDefRecipe. (PR #77023)

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``````````bash
git-clang-format --diff 241fe83704476f81e3438e32b6d988ea123e624d da2fefb8ffa98d24c75f4cb03107158668f1313b -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlan.h llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
index 06593f99f5..b4d3a52878 100644
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -8944,7 +8944,8 @@ void LoopVectorizationPlanner::adjustRecipesForReductions(
       for (VPUser *U : Cur->users()) {
         auto *UserRecipe = dyn_cast<VPSingleDefRecipe>(U);
         if (!UserRecipe) {
-          assert(isa<VPLiveOut>(U) && "U must either be a VPSingleDef or VPLiveOut");
+          assert(isa<VPLiveOut>(U) &&
+                 "U must either be a VPSingleDef or VPLiveOut");
           continue;
         }
         Worklist.insert(UserRecipe);
diff --git a/llvm/lib/Transforms/Vectorize/VPlan.h b/llvm/lib/Transforms/Vectorize/VPlan.h
index 745bd699fb..60c7a31f25 100644
--- a/llvm/lib/Transforms/Vectorize/VPlan.h
+++ b/llvm/lib/Transforms/Vectorize/VPlan.h
@@ -702,7 +702,8 @@ public:
 /// VPRecipeBase is a base class modeling a sequence of one or more output IR
 /// instructions. VPRecipeBase owns the VPValues it defines through VPDef
 /// and is responsible for deleting its defined values. Single-value
-/// recipes must inherit from VPSingleDef instead of inheriting from both VPRecipeBase and VPValue separately.
+/// recipes must inherit from VPSingleDef instead of inheriting from both
+/// VPRecipeBase and VPValue separately.
 class VPRecipeBase : public ilist_node_with_parent<VPRecipeBase, VPBasicBlock>,
                      public VPDef,
                      public VPUser {
@@ -816,7 +817,8 @@ public:
     return R->getVPDefID() == VPDefID;                                         \
   }
 
-/// VPSingleDef is a base class for recipes for modeling a sequence of one or more output IR that define a single result VPValue.
+/// VPSingleDef is a base class for recipes for modeling a sequence of one or
+/// more output IR that define a single result VPValue.
 class VPSingleDefRecipe : public VPRecipeBase, public VPValue {
 public:
   template <typename IterT>
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 61c79283ab..d111e0a47b 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -415,8 +415,7 @@ void VPlanTransforms::removeRedundantInductionCasts(VPlan &Plan) {
       VPSingleDefRecipe *FoundUserCast = nullptr;
       for (auto *U : FindMyCast->users()) {
         auto *UserCast = dyn_cast<VPSingleDefRecipe>(U);
-        if (UserCast &&
-            UserCast->getUnderlyingValue() == IRCast) {
+        if (UserCast && UserCast->getUnderlyingValue() == IRCast) {
           FoundUserCast = UserCast;
           break;
         }

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https://github.com/llvm/llvm-project/pull/77023