llvm::SmallPtrSetImpl Class Reference
#include <SmallPtrSet.h>
Public Member Functions | |
| SmallPtrSetImpl (unsigned SmallSize) | |
| ~SmallPtrSetImpl () | |
| bool | empty () const |
| unsigned | size () const |
| void | clear () |
Static Public Member Functions | |
| static void * | getTombstoneMarker () |
| static void * | getEmptyMarker () |
Protected Member Functions | |
| SmallPtrSetImpl (const SmallPtrSetImpl &that) | |
| bool | insert_imp (const void *Ptr) |
| bool | erase_imp (const void *Ptr) |
| bool | count_imp (const void *Ptr) const |
| void | CopyFrom (const SmallPtrSetImpl &RHS) |
Protected Attributes | |
| const void ** | CurArray |
| unsigned | CurArraySize |
| unsigned | NumElements |
| unsigned | NumTombstones |
| const void * | SmallArray [1] |
Detailed Description
SmallPtrSetImpl - This is the common code shared among all the SmallPtrSet<>'s, which is almost everything. SmallPtrSet has two modes, one for small and one for large sets.Small sets use an array of pointers allocated in the SmallPtrSet object, which is treated as a simple array of pointers. When a pointer is added to the set, the array is scanned to see if the element already exists, if not the element is 'pushed back' onto the array. If we run out of space in the array, we grow into the 'large set' case. SmallSet should be used when the sets are often small. In this case, no memory allocation is used, and only light-weight and cache-efficient scanning is used.
Large sets use a classic exponentially-probed hash table. Empty buckets are represented with an illegal pointer value (-1) to allow null pointers to be inserted. Tombstones are represented with another illegal pointer value (-2), to allow deletion. The hash table is resized when the table is 3/4 or more. When this happens, the table is doubled in size.
Definition at line 42 of file SmallPtrSet.h.
Constructor & Destructor Documentation
| SmallPtrSetImpl::SmallPtrSetImpl | ( | const SmallPtrSetImpl & | that | ) | [protected] |
Definition at line 169 of file SmallPtrSet.cpp.
References CurArray, CurArraySize, isSmall(), NumElements, NumTombstones, and SmallArray.
| llvm::SmallPtrSetImpl::SmallPtrSetImpl | ( | unsigned | SmallSize | ) | [inline, explicit] |
Definition at line 60 of file SmallPtrSet.h.
References clear(), CurArray, CurArraySize, and SmallArray.
| SmallPtrSetImpl::~SmallPtrSetImpl | ( | ) |
Member Function Documentation
| bool llvm::SmallPtrSetImpl::empty | ( | ) | const [inline] |
Definition at line 72 of file SmallPtrSet.h.
References size().
Referenced by isLiveInButUnusedBefore(), and llvm::MemoryDependenceAnalysis::removeInstruction().
| unsigned llvm::SmallPtrSetImpl::size | ( | ) | const [inline] |
Definition at line 73 of file SmallPtrSet.h.
References NumElements.
Referenced by DeadPHICycle(), empty(), PHIsEqualValue(), and RemoveUnreachableBlocksFromFn().
| static void* llvm::SmallPtrSetImpl::getTombstoneMarker | ( | ) | [inline, static] |
Definition at line 75 of file SmallPtrSet.h.
Referenced by llvm::SmallPtrSetIteratorImpl::AdvanceIfNotValid(), erase_imp(), and insert_imp().
| static void* llvm::SmallPtrSetImpl::getEmptyMarker | ( | ) | [inline, static] |
Definition at line 76 of file SmallPtrSet.h.
Referenced by llvm::SmallPtrSetIteratorImpl::AdvanceIfNotValid(), and erase_imp().
| void llvm::SmallPtrSetImpl::clear | ( | ) | [inline] |
Definition at line 82 of file SmallPtrSet.h.
References CurArray, CurArraySize, NumElements, and NumTombstones.
Referenced by SmallPtrSetImpl().
| bool SmallPtrSetImpl::insert_imp | ( | const void * | Ptr | ) | [protected] |
insert_imp - This returns true if the pointer was new to the set, false if it was already in the set. This is hidden from the client so that the derived class can check that the right type of pointer is passed in.
Definition at line 39 of file SmallPtrSet.cpp.
References CurArraySize, E, getTombstoneMarker(), NumTombstones, and SmallArray.
Referenced by llvm::SmallPtrSet< const llvm::Function *, 16 >::insert().
| bool SmallPtrSetImpl::erase_imp | ( | const void * | Ptr | ) | [protected] |
erase_imp - If the set contains the specified pointer, remove it and return true, otherwise return false. This is hidden from the client so that the derived class can check that the right type of pointer is passed in.
Definition at line 72 of file SmallPtrSet.cpp.
References E, getEmptyMarker(), getTombstoneMarker(), NumTombstones, and SmallArray.
Referenced by llvm::SmallPtrSet< const llvm::Function *, 16 >::erase().
| bool llvm::SmallPtrSetImpl::count_imp | ( | const void * | Ptr | ) | const [inline, protected] |
Definition at line 106 of file SmallPtrSet.h.
References E, NumElements, and SmallArray.
Referenced by llvm::SmallPtrSet< const llvm::Function *, 16 >::count().
| void SmallPtrSetImpl::CopyFrom | ( | const SmallPtrSetImpl & | RHS | ) | [protected] |
CopyFrom - implement operator= from a smallptrset that has the same pointer type, but may have a different small size.
Definition at line 191 of file SmallPtrSet.cpp.
References CurArray, CurArraySize, isSmall(), NumElements, NumTombstones, and SmallArray.
Referenced by llvm::SmallPtrSet< const llvm::Function *, 16 >::operator=().
Member Data Documentation
const void** llvm::SmallPtrSetImpl::CurArray [protected] |
CurArray - This is the current set of buckets. If it points to SmallArray, then the set is in 'small mode'.
Definition at line 46 of file SmallPtrSet.h.
Referenced by llvm::SmallPtrSet< const llvm::Function *, 16 >::begin(), clear(), CopyFrom(), llvm::SmallPtrSet< const llvm::Function *, 16 >::end(), SmallPtrSetImpl(), and ~SmallPtrSetImpl().
unsigned llvm::SmallPtrSetImpl::CurArraySize [protected] |
CurArraySize - The allocated size of CurArray, always a power of two. Note that CurArray points to an array that has CurArraySize+1 elements in it, so that the end iterator actually points to valid memory.
Definition at line 50 of file SmallPtrSet.h.
Referenced by clear(), CopyFrom(), llvm::SmallPtrSet< const llvm::Function *, 16 >::end(), insert_imp(), and SmallPtrSetImpl().
unsigned llvm::SmallPtrSetImpl::NumElements [protected] |
Definition at line 53 of file SmallPtrSet.h.
Referenced by clear(), CopyFrom(), count_imp(), size(), and SmallPtrSetImpl().
unsigned llvm::SmallPtrSetImpl::NumTombstones [protected] |
Definition at line 54 of file SmallPtrSet.h.
Referenced by clear(), CopyFrom(), erase_imp(), insert_imp(), and SmallPtrSetImpl().
const void* llvm::SmallPtrSetImpl::SmallArray[1] [protected] |
Definition at line 55 of file SmallPtrSet.h.
Referenced by CopyFrom(), count_imp(), erase_imp(), insert_imp(), and SmallPtrSetImpl().
The documentation for this class was generated from the following files:
1.5.6