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when we tear down a module, we need to be careful to

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zap BlockAddress values.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85366 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-10-28 03:37:35 +00:00
parent 6d013fc381
commit 1e0dc8e123
1 changed files with 14 additions and 1 deletions
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15
lib/VMCore/Function.cpp
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@ -217,7 +217,20 @@ void Function::setParent(Module *parent) {
void Function::dropAllReferences() {
for (iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();
BasicBlocks.clear(); // Delete all basic blocks...
// Delete all basic blocks.
while (!BasicBlocks.empty()) {
// If there is still a reference to the block, it must be a 'blockaddress'
// constant pointing to it. Just replace the BlockAddress with undef.
BasicBlock *BB = BasicBlocks.begin();
if (!BB->use_empty()) {
BlockAddress *BA = cast<BlockAddress>(BB->use_back());
BA->replaceAllUsesWith(UndefValue::get(BA->getType()));
BA->destroyConstant();
}
BB->eraseFromParent();
}
}
void Function::addAttribute(unsigned i, Attributes attr) {