[llvm] [VPlan] Create SCEV before any VPIRInstructions to check for overflow (PR #177911)

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

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``````````diff
diff --git a/llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp b/llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp
index fca6cf002..534b3d139 100644
--- a/llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp
+++ b/llvm/lib/Transforms/Vectorize/VPlanConstruction.cpp
@@ -1052,8 +1052,8 @@ void VPlanTransforms::addMinimumIterationCheck(
       // Don't execute the vector loop if (UMax - n) < (VF * UF).
       // FIXME: Should only check VF * UF, but currently checks Step=max(VF*UF,
       // minProfitableTripCount).
-      TripCountCheck = Builder.createICmp(ICmpInst::ICMP_ULT, DistanceToMax,
-                                          StepV, DL);
+      TripCountCheck =
+          Builder.createICmp(ICmpInst::ICMP_ULT, DistanceToMax, StepV, DL);
     } else {
       // TripCountCheck = false, folding tail implies positive vector trip
       // count.

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https://github.com/llvm/llvm-project/pull/177911