zap BlockAddress values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85366
91177308-0d34-0410-b5e6-
96231b3b80d8
void Function::dropAllReferences() {
for (iterator I = begin(), E = end(); I != E; ++I)
I->dropAllReferences();
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) {
}
void Function::addAttribute(unsigned i, Attributes attr) {