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optimize StringMap::clear

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llvm-svn: 53009
This commit is contained in:
Chris Lattner 2008-07-02 05:30:45 +00:00
parent 06545d1c4a
commit 441571cc05
1 changed files with 11 additions and 6 deletions
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17
include/llvm/ADT/StringMap.h
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@ -335,8 +335,16 @@ public:
// clear - Empties out the StringMap
void clear() {
while (!empty())
erase(begin());
if (empty()) return;
// Zap all values, resetting the keys back to non-present (not tombstone),
// which is safe because we're removing all elements.
for (ItemBucket *I = TheTable, *E = TheTable+NumBuckets; I != E; ++I) {
if (I->Item && I->Item != getTombstoneVal()) {
static_cast<MapEntryTy*>(I->Item)->Destroy(Allocator);
I->Item = 0;
}
}
}
/// GetOrCreateValue - Look up the specified key in the table. If a value
@ -398,10 +406,7 @@ public:
}
~StringMap() {
for (ItemBucket *I = TheTable, *E = TheTable+NumBuckets; I != E; ++I) {
if (I->Item && I->Item != getTombstoneVal())
static_cast<MapEntryTy*>(I->Item)->Destroy(Allocator);
}
clear();
free(TheTable);
}
private: