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add resize, move swap out of line
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29823 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -112,43 +112,20 @@ public:
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End = Begin;
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}
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void swap(SmallVectorImpl &RHS) {
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if (this == &RHS) return;
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// We can only avoid copying elements if neither vector is small.
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if (!isSmall() && !RHS.isSmall()) {
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std::swap(Begin, RHS.Begin);
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std::swap(End, RHS.End);
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std::swap(Capacity, RHS.Capacity);
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return;
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}
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if (Begin+RHS.size() > Capacity)
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grow(RHS.size());
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if (RHS.begin()+size() > RHS.Capacity)
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RHS.grow(size());
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// Swap the shared elements.
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unsigned NumShared = size();
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if (NumShared > RHS.size()) NumShared = RHS.size();
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for (unsigned i = 0; i != NumShared; ++i)
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std::swap(Begin[i], RHS[i]);
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// Copy over the extra elts.
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if (size() > RHS.size()) {
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unsigned EltDiff = size() - RHS.size();
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std::uninitialized_copy(Begin+NumShared, End, RHS.End);
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RHS.End += EltDiff;
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destroy_range(Begin+NumShared, End);
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End = Begin+NumShared;
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} else if (RHS.size() > size()) {
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unsigned EltDiff = RHS.size() - size();
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std::uninitialized_copy(RHS.Begin+NumShared, RHS.End, End);
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End += EltDiff;
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destroy_range(RHS.Begin+NumShared, RHS.End);
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RHS.End = RHS.Begin+NumShared;
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void resize(unsigned N) {
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if (N < size()) {
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destroy_range(Begin+N, End);
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End = Begin+N;
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} else if (N > size()) {
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if (Begin+N > Capacity)
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grow(N);
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construct_range(End, Begin+N, T());
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End = Begin+N;
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}
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}
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void swap(SmallVectorImpl &RHS);
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/// append - Add the specified range to the end of the SmallVector.
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///
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template<typename in_iter>
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@ -168,8 +145,7 @@ public:
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if (Begin+NumElts > Capacity)
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grow(NumElts);
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End = Begin+NumElts;
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for (; NumElts; --NumElts)
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new (Begin+NumElts-1) T(Elt);
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construct_range(Begin, End, Elt);
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}
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void erase(iterator I) {
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@ -220,6 +196,12 @@ private:
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/// grow - double the size of the allocated memory, guaranteeing space for at
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/// least one more element or MinSize if specified.
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void grow(unsigned MinSize = 0);
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void construct_range(T *S, T *E, const T &Elt) {
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for (; S != E; ++S)
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new (S) T(Elt);
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}
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void destroy_range(T *S, T *E) {
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while (S != E) {
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@ -253,6 +235,44 @@ void SmallVectorImpl<T>::grow(unsigned MinSize) {
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End = NewElts+CurSize;
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Capacity = Begin+NewCapacity;
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}
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template <typename T>
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void SmallVectorImpl<T>::swap(SmallVectorImpl<T> &RHS) {
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if (this == &RHS) return;
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// We can only avoid copying elements if neither vector is small.
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if (!isSmall() && !RHS.isSmall()) {
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std::swap(Begin, RHS.Begin);
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std::swap(End, RHS.End);
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std::swap(Capacity, RHS.Capacity);
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return;
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}
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if (Begin+RHS.size() > Capacity)
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grow(RHS.size());
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if (RHS.begin()+size() > RHS.Capacity)
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RHS.grow(size());
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// Swap the shared elements.
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unsigned NumShared = size();
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if (NumShared > RHS.size()) NumShared = RHS.size();
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for (unsigned i = 0; i != NumShared; ++i)
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std::swap(Begin[i], RHS[i]);
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// Copy over the extra elts.
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if (size() > RHS.size()) {
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unsigned EltDiff = size() - RHS.size();
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std::uninitialized_copy(Begin+NumShared, End, RHS.End);
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RHS.End += EltDiff;
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destroy_range(Begin+NumShared, End);
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End = Begin+NumShared;
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} else if (RHS.size() > size()) {
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unsigned EltDiff = RHS.size() - size();
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std::uninitialized_copy(RHS.Begin+NumShared, RHS.End, End);
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End += EltDiff;
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destroy_range(RHS.Begin+NumShared, RHS.End);
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RHS.End = RHS.Begin+NumShared;
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}
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}
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template <typename T>
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const SmallVectorImpl<T> &
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