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Allow FoldingSet clients to pump up the initial hash size.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31377 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2006-11-02 14:21:26 +00:00
parent 41562398b6
commit 1f67a99260
2 changed files with 9 additions and 3 deletions
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6
include/llvm/ADT/FoldingSet.h
View File

@ -117,7 +117,7 @@ private:
unsigned NumNodes;
public:
FoldingSetImpl();
FoldingSetImpl(unsigned Log2InitSize = 6);
virtual ~FoldingSetImpl();
// Forward declaration.
@ -229,6 +229,10 @@ private:
}
public:
FoldingSet(unsigned Log2InitSize = 6)
: FoldingSetImpl(Log2InitSize)
{}
/// GetOrInsertNode - If there is an existing simple Node exactly
/// equal to the specified node, return it. Otherwise, insert 'N' and
/// return it instead.

6
lib/Support/FoldingSet.cpp
View File

@ -151,8 +151,10 @@ static void **GetBucketFor(const FoldingSetImpl::NodeID &ID,
//===----------------------------------------------------------------------===//
// FoldingSetImpl Implementation
FoldingSetImpl::FoldingSetImpl() : NumNodes(0) {
NumBuckets = 64;
FoldingSetImpl::FoldingSetImpl(unsigned Log2InitSize) : NumNodes(0) {
assert(5 < Log2InitSize && Log2InitSize < 32 &&
"Initial hash table size out of range");
NumBuckets = 1 << Log2InitSize;
Buckets = new void*[NumBuckets];
memset(Buckets, 0, NumBuckets*sizeof(void*));
}