FoldingSet.cpp File Reference

#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/SwapByteOrder.h"
#include <cassert>
#include <cstring>

Go to the source code of this file.

Functions
static FoldingSetBase::Node *	GetNextPtr (void *NextInBucketPtr)
	Helper functions for FoldingSetBase.
static void **	GetBucketPtr (void *NextInBucketPtr)
	testing.
static void **	GetBucketFor (unsigned Hash, void **Buckets, unsigned NumBuckets)
	GetBucketFor - Hash the specified node ID and return the hash bucket for the specified ID.
static void **	AllocateBuckets (unsigned NumBuckets)
	AllocateBuckets - Allocated initialized bucket memory.

Function Documentation

AllocateBuckets()

static void ** AllocateBuckets ( unsigned  NumBuckets )

static

AllocateBuckets - Allocated initialized bucket memory.

Definition at line 172 of file FoldingSet.cpp.

References llvm::safe_calloc().

Referenced by llvm::FoldingSetBase::FoldingSetBase().

GetBucketFor()

static void ** GetBucketFor ( unsigned  Hash, void **  Buckets, unsigned  NumBuckets  )

static

GetBucketFor - Hash the specified node ID and return the hash bucket for the specified ID.

Definition at line 165 of file FoldingSet.cpp.

Referenced by llvm::FoldingSetBase::FindNodeOrInsertPos(), and llvm::FoldingSetBase::InsertNode().

GetBucketPtr()

static void ** GetBucketPtr ( void *  NextInBucketPtr )

static

testing.

Definition at line 157 of file FoldingSet.cpp.

References assert(), and Ptr.

Referenced by llvm::FoldingSetIteratorImpl::advance(), and llvm::FoldingSetBase::RemoveNode().

GetNextPtr()

static FoldingSetBase::Node * GetNextPtr ( void *  NextInBucketPtr )

static

Helper functions for FoldingSetBase.

GetNextPtr - In order to save space, each bucket is a singly-linked-list. In order to make deletion more efficient, we make the list circular, so we can delete a node without computing its hash. The problem with this is that the start of the hash buckets are not Nodes. If NextInBucketPtr is a bucket pointer, this method returns null: use GetBucketPtr when this happens.

Definition at line 147 of file FoldingSet.cpp.

Referenced by llvm::FoldingSetIteratorImpl::advance(), llvm::FoldingSetBase::FindNodeOrInsertPos(), llvm::FoldingSetBucketIteratorImpl::FoldingSetBucketIteratorImpl(), llvm::FoldingSetIteratorImpl::FoldingSetIteratorImpl(), and llvm::FoldingSetBase::RemoveNode().