[llvm] [NFCI][msan] Use IntPtr for vscales origin for consistency (PR #90920)

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git-clang-format --diff 9058ce523a7300c68eeedf3fbd170cd18b73f27f 95f3d769283153db00c11bc5f48fbe47ac68c53f -- llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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View the diff from clang-format here.
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diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 63da2b8514..b352558a1c 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -1238,8 +1238,10 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     // however we prefer to unroll and specialize alignment below.
     if (TS.isScalable()) {
       Value *Size = IRB.CreateTypeSize(MS.IntptrTy, TS);
-      Value *RoundUp = IRB.CreateAdd(Size, ConstantInt::get(MS.IntptrTy, kOriginSize - 1));
-      Value *End = IRB.CreateUDiv(RoundUp, ConstantInt::get(MS.IntptrTy, kOriginSize));
+      Value *RoundUp =
+          IRB.CreateAdd(Size, ConstantInt::get(MS.IntptrTy, kOriginSize - 1));
+      Value *End =
+          IRB.CreateUDiv(RoundUp, ConstantInt::get(MS.IntptrTy, kOriginSize));
       auto [InsertPt, Index] =
         SplitBlockAndInsertSimpleForLoop(End, &*IRB.GetInsertPoint());
       IRB.SetInsertPoint(InsertPt);

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https://github.com/llvm/llvm-project/pull/90920