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DenseMap: Use an early exit when there is nothing to do in DestroyAll().

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157550 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-05-27 22:53:10 +00:00
parent 65195411cc
commit 8e33712013
1 changed files with 5 additions and 4 deletions
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9
include/llvm/ADT/DenseMap.h
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@@ -273,6 +273,9 @@ public:
private: private:
void DestroyAll() { void DestroyAll() {
if (NumBuckets == 0) // Nothing to do.
return;
const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey(); const KeyT EmptyKey = getEmptyKey(), TombstoneKey = getTombstoneKey();
for (BucketT *P = Buckets, *E = Buckets+NumBuckets; P != E; ++P) { for (BucketT *P = Buckets, *E = Buckets+NumBuckets; P != E; ++P) {
if (!KeyInfoT::isEqual(P->first, EmptyKey) && if (!KeyInfoT::isEqual(P->first, EmptyKey) &&
@@ -281,12 +284,10 @@ private:
P->first.~KeyT(); P->first.~KeyT();
} }
if (NumBuckets) {
#ifndef NDEBUG #ifndef NDEBUG
memset((void*)Buckets, 0x5a, sizeof(BucketT)*NumBuckets); memset((void*)Buckets, 0x5a, sizeof(BucketT)*NumBuckets);
#endif #endif
operator delete(Buckets); operator delete(Buckets);
}
} }
void CopyFrom(const DenseMap& other) { void CopyFrom(const DenseMap& other) {