[PATCH] D31757: [clang-tidy] Add a clang-tidy check for possible inefficient vector operations

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
Herald added a subscriber: mgorny.

The "performance-inefficient-vector-operation" check finds vector oprations in
for-loop statements which may cause multiple memory reallocations.

This is the first version, only detects typical for-loop:

  std::vector<int> v;
  for (int i = 0; i < n; ++i) {
    v.push_back(i);
  }
  
  // or
  
  for (int i = 0; i < v2.size(); ++i) {
    v.push_back(v2[i]);
  }

We can extend it to handle more cases like for-range loop in the future.


https://reviews.llvm.org/D31757

Files:
  clang-tidy/performance/CMakeLists.txt
  clang-tidy/performance/InefficientVectorOperationCheck.cpp
  clang-tidy/performance/InefficientVectorOperationCheck.h
  clang-tidy/performance/PerformanceTidyModule.cpp
  docs/clang-tidy/checks/list.rst
  docs/clang-tidy/checks/performance-inefficient-vector-operation.rst
  test/clang-tidy/performance-inefficient-vector-operation.cpp

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