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blockfreq: Implement clear() explicitly
This was implicitly with copy assignment before, which fails to actually clear `std::vector<>`'s heap storage. Move assignment would work, but since MSVC can't imply those anyway, explicitly `clear()`-ing members makes more sense. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206856 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -598,7 +598,11 @@ void Distribution::normalize() {
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}
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void BlockFrequencyInfoImplBase::clear() {
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void BlockFrequencyInfoImplBase::clear() {
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*this = BlockFrequencyInfoImplBase();
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// Swap with a default-constructed std::vector, since std::vector<>::clear()
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// does not actually clear heap storage.
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std::vector<FrequencyData>().swap(Freqs);
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std::vector<WorkingData>().swap(Working);
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std::vector<LoopData>().swap(PackagedLoops);
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}
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}
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/// \brief Clear all memory not needed downstream.
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/// \brief Clear all memory not needed downstream.
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