[llvm] [VPlan] Use SCEV optimize VecTC-materialization for scalable (PR #193703)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp llvm/lib/Transforms/Vectorize/VPlanTransforms.h --diff_from_common_commit
``````````

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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
index 6cc851c03..7d333ab11 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
@@ -5134,9 +5134,11 @@ void VPlanTransforms::materializePacksAndUnpacks(VPlan &Plan) {
   }
 }
 
-void VPlanTransforms::materializeVectorTripCount(
-    VPlan &Plan, VPBasicBlock *VectorPHVPBB,
-    bool TailByMasking, bool RequiresScalarEpilogue, VPValue *Step) {
+void VPlanTransforms::materializeVectorTripCount(VPlan &Plan,
+                                                 VPBasicBlock *VectorPHVPBB,
+                                                 bool TailByMasking,
+                                                 bool RequiresScalarEpilogue,
+                                                 VPValue *Step) {
   VPSymbolicValue &VectorTC = Plan.getVectorTripCount();
   // There's nothing to do if there are no users of the vector trip count or its
   // IR value has already been set.

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https://github.com/llvm/llvm-project/pull/193703