[llvm] Mark variable as maybe unused (only used in debug mode) (PR #157875)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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``````````diff
diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index e2da9aa7b..9899a2aae 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -3903,7 +3903,8 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
            ReturnType->getPrimitiveSizeInBits());
 
     if (I.arg_size() == 3) {
-      [[maybe_unused]] auto *AccumulatorType = cast<FixedVectorType>(I.getOperand(0)->getType());
+      [[maybe_unused]] auto *AccumulatorType =
+          cast<FixedVectorType>(I.getOperand(0)->getType());
       assert(AccumulatorType == ReturnType);
     }
 

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https://github.com/llvm/llvm-project/pull/157875