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Fixed bug in FoldingSetIteratorImpl where we did not correctly check if

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we had reached the "fake bucket" after the last bucket, allowing the iterator
in some cases to run off the end of the hashtable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47178 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ted Kremenek 2008-02-15 21:12:46 +00:00
parent 53c607f562
commit e3e09574ae
1 changed files with 4 additions and 2 deletions
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6
lib/Support/FoldingSet.cpp
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@ -326,7 +326,8 @@ FoldingSetImpl::Node *FoldingSetImpl::GetOrInsertNode(FoldingSetImpl::Node *N) {
FoldingSetIteratorImpl::FoldingSetIteratorImpl(void **Bucket) {
// Skip to the first non-null non-self-cycle bucket.
while (*Bucket == 0 || GetNextPtr(*Bucket) == 0)
while (*Bucket != reinterpret_cast<void*>(-1) &&
(*Bucket == 0 || GetNextPtr(*Bucket) == 0))
++Bucket;
NodePtr = static_cast<FoldingSetNode*>(*Bucket);
@ -345,7 +346,8 @@ void FoldingSetIteratorImpl::advance() {
// Skip to the next non-null non-self-cycle bucket.
do {
++Bucket;
} while (*Bucket == 0 || GetNextPtr(*Bucket) == 0);
} while (*Bucket != reinterpret_cast<void*>(-1) &&
(*Bucket == 0 || GetNextPtr(*Bucket) == 0));
NodePtr = static_cast<FoldingSetNode*>(*Bucket);
}