[clang-tools-extra] [clang-tidy] Fix false negative in performance-inefficient-vector-ope… (PR #179484)

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Tue Feb 3 07:55:09 PST 2026


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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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<summary>
You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp clang-tools-extra/test/clang-tidy/checkers/performance/inefficient-vector-operation.cpp --diff_from_common_commit
``````````

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The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

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<details>
<summary>
View the diff from clang-format here.
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``````````diff
diff --git a/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp b/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
index 8f8bbbfd1..b6de5ac87 100644
--- a/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
+++ b/clang-tools-extra/clang-tidy/performance/InefficientVectorOperationCheck.cpp
@@ -113,8 +113,8 @@ void InefficientVectorOperationCheck::addMatcher(
 
   // Matchers for the loop whose body contains a push_back/emplace_back calling
   // statement.
-  const auto HasInterestingLoopBody = hasBody(
-      anyOf(compoundStmt(has(AppendCall)), AppendCall));
+  const auto HasInterestingLoopBody =
+      hasBody(anyOf(compoundStmt(has(AppendCall)), AppendCall));
   const auto InInterestingCompoundStmt =
       hasParent(compoundStmt(has(TargetVarDefStmt)).bind(LoopParentName));
 

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https://github.com/llvm/llvm-project/pull/179484


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