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[WinEH] Fix memory leak with catch-all mapping.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235328 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Kaylor 2015-04-20 18:48:45 +00:00
parent b54df5252a
commit 9cc1f32626
1 changed files with 12 additions and 5 deletions
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17
lib/CodeGen/WinEHPrepare.cpp
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@ -1425,11 +1425,18 @@ void WinEHPrepare::mapLandingPadBlocks(LandingPadInst *LPad,
findCleanupHandlers(Actions, BB, BB);
// Add the catch handler to the action list.
// Since this is a catch-all handler, the selector won't actually appear
// in the code anywhere. ExpectedSelector here is the constant null ptr
// that we got from the landing pad instruction.
CatchHandler *Action = new CatchHandler(BB, ExpectedSelector, nullptr);
CatchHandlerMap[BB] = Action;
CatchHandler *Action = nullptr;
if (CatchHandlerMap.count(BB) && CatchHandlerMap[BB] != nullptr) {
// If the CatchHandlerMap already has an entry for this BB, re-use it.
Action = CatchHandlerMap[BB];
assert(Action->getSelector() == ExpectedSelector);
} else {
// Since this is a catch-all handler, the selector won't actually appear
// in the code anywhere. ExpectedSelector here is the constant null ptr
// that we got from the landing pad instruction.
Action = new CatchHandler(BB, ExpectedSelector, nullptr);
CatchHandlerMap[BB] = Action;
}
Actions.insertCatchHandler(Action);
DEBUG(dbgs() << " Catch all handler at block " << BB->getName() << "\n");
++HandlersFound;