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diff --git a/include/clang/Analysis/Support/BumpVector.h b/include/clang/Analysis/Support/BumpVector.h
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-//===-- BumpVector.h - Vector-like ADT that uses bump allocation --*- C++ -*-=//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file provides BumpVector, a vector-like ADT whose contents are
-// allocated from a BumpPtrAllocator.
-//
-//===----------------------------------------------------------------------===//
-
-// FIXME: Most of this is copy-and-paste from SmallVector.h. We can
-// refactor this core logic into something common that is shared between
-// the two. The main thing that is different is the allocation strategy.
-
-#ifndef LLVM_CLANG_ANALYSIS_SUPPORT_BUMPVECTOR_H
-#define LLVM_CLANG_ANALYSIS_SUPPORT_BUMPVECTOR_H
-
-#include "llvm/ADT/PointerIntPair.h"
-#include "llvm/Support/Allocator.h"
-#include "llvm/Support/type_traits.h"
-#include <algorithm>
-#include <cstring>
-#include <iterator>
-#include <memory>
-
-namespace clang {
-
-class BumpVectorContext {
- llvm::PointerIntPair<llvm::BumpPtrAllocator*, 1> Alloc;
-public:
- /// Construct a new BumpVectorContext that creates a new BumpPtrAllocator
- /// and destroys it when the BumpVectorContext object is destroyed.
- BumpVectorContext() : Alloc(new llvm::BumpPtrAllocator(), 1) {}
-
- BumpVectorContext(BumpVectorContext &&Other) : Alloc(Other.Alloc) {
- Other.Alloc.setInt(false);
- Other.Alloc.setPointer(nullptr);
- }
-
- /// Construct a new BumpVectorContext that reuses an existing
- /// BumpPtrAllocator. This BumpPtrAllocator is not destroyed when the
- /// BumpVectorContext object is destroyed.
- BumpVectorContext(llvm::BumpPtrAllocator &A) : Alloc(&A, 0) {}
-
- ~BumpVectorContext() {
- if (Alloc.getInt())
- delete Alloc.getPointer();
- }
-
- llvm::BumpPtrAllocator &getAllocator() { return *Alloc.getPointer(); }
-};
-
-template<typename T>
-class BumpVector {
- T *Begin, *End, *Capacity;
-public:
- // Default ctor - Initialize to empty.
- explicit BumpVector(BumpVectorContext &C, unsigned N)
- : Begin(nullptr), End(nullptr), Capacity(nullptr) {
- reserve(C, N);
- }
-
- ~BumpVector() {
- if (std::is_class<T>::value) {
- // Destroy the constructed elements in the vector.
- destroy_range(Begin, End);
- }
- }
-
- typedef size_t size_type;
- typedef ptrdiff_t difference_type;
- typedef T value_type;
- typedef T* iterator;
- typedef const T* const_iterator;
-
- typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
- typedef std::reverse_iterator<iterator> reverse_iterator;
-
- typedef T& reference;
- typedef const T& const_reference;
- typedef T* pointer;
- typedef const T* const_pointer;
-
- // forward iterator creation methods.
- iterator begin() { return Begin; }
- const_iterator begin() const { return Begin; }
- iterator end() { return End; }
- const_iterator end() const { return End; }
-
- // reverse iterator creation methods.
- reverse_iterator rbegin() { return reverse_iterator(end()); }
- const_reverse_iterator rbegin() const{ return const_reverse_iterator(end()); }
- reverse_iterator rend() { return reverse_iterator(begin()); }
- const_reverse_iterator rend() const { return const_reverse_iterator(begin());}
-
- bool empty() const { return Begin == End; }
- size_type size() const { return End-Begin; }
-
- reference operator[](unsigned idx) {
- assert(Begin + idx < End);
- return Begin[idx];
- }
- const_reference operator[](unsigned idx) const {
- assert(Begin + idx < End);
- return Begin[idx];
- }
-
- reference front() {
- return begin()[0];
- }
- const_reference front() const {
- return begin()[0];
- }
-
- reference back() {
- return end()[-1];
- }
- const_reference back() const {
- return end()[-1];
- }
-
- void pop_back() {
- --End;
- End->~T();
- }
-
- T pop_back_val() {
- T Result = back();
- pop_back();
- return Result;
- }
-
- void clear() {
- if (std::is_class<T>::value) {
- destroy_range(Begin, End);
- }
- End = Begin;
- }
-
- /// data - Return a pointer to the vector's buffer, even if empty().
- pointer data() {
- return pointer(Begin);
- }
-
- /// data - Return a pointer to the vector's buffer, even if empty().
- const_pointer data() const {
- return const_pointer(Begin);
- }
-
- void push_back(const_reference Elt, BumpVectorContext &C) {
- if (End < Capacity) {
- Retry:
- new (End) T(Elt);
- ++End;
- return;
- }
- grow(C);
- goto Retry;
- }
-
- /// insert - Insert some number of copies of element into a position. Return
- /// iterator to position after last inserted copy.
- iterator insert(iterator I, size_t Cnt, const_reference E,
- BumpVectorContext &C) {
- assert (I >= Begin && I <= End && "Iterator out of bounds.");
- if (End + Cnt <= Capacity) {
- Retry:
- move_range_right(I, End, Cnt);
- construct_range(I, I + Cnt, E);
- End += Cnt;
- return I + Cnt;
- }
- ptrdiff_t D = I - Begin;
- grow(C, size() + Cnt);
- I = Begin + D;
- goto Retry;
- }
-
- void reserve(BumpVectorContext &C, unsigned N) {
- if (unsigned(Capacity-Begin) < N)
- grow(C, N);
- }
-
- /// capacity - Return the total number of elements in the currently allocated
- /// buffer.
- size_t capacity() const { return Capacity - Begin; }
-
-private:
- /// grow - double the size of the allocated memory, guaranteeing space for at
- /// least one more element or MinSize if specified.
- void grow(BumpVectorContext &C, size_type MinSize = 1);
-
- void construct_range(T *S, T *E, const T &Elt) {
- for (; S != E; ++S)
- new (S) T(Elt);
- }
-
- void destroy_range(T *S, T *E) {
- while (S != E) {
- --E;
- E->~T();
- }
- }
-
- void move_range_right(T *S, T *E, size_t D) {
- for (T *I = E + D - 1, *IL = S + D - 1; I != IL; --I) {
- --E;
- new (I) T(*E);
- E->~T();
- }
- }
-};
-
-// Define this out-of-line to dissuade the C++ compiler from inlining it.
-template <typename T>
-void BumpVector<T>::grow(BumpVectorContext &C, size_t MinSize) {
- size_t CurCapacity = Capacity-Begin;
- size_t CurSize = size();
- size_t NewCapacity = 2*CurCapacity;
- if (NewCapacity < MinSize)
- NewCapacity = MinSize;
-
- // Allocate the memory from the BumpPtrAllocator.
- T *NewElts = C.getAllocator().template Allocate<T>(NewCapacity);
-
- // Copy the elements over.
- if (Begin != End) {
- if (std::is_class<T>::value) {
- std::uninitialized_copy(Begin, End, NewElts);
- // Destroy the original elements.
- destroy_range(Begin, End);
- } else {
- // Use memcpy for PODs (std::uninitialized_copy optimizes to memmove).
- memcpy(NewElts, Begin, CurSize * sizeof(T));
- }
- }
-
- // For now, leak 'Begin'. We can add it back to a freelist in
- // BumpVectorContext.
- Begin = NewElts;
- End = NewElts+CurSize;
- Capacity = Begin+NewCapacity;
-}
-
-} // end: clang namespace
-#endif
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