Do not delete BBs if their addresses are taken. rdar://12396696
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164866 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 7856863..305d70f 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -226,7 +226,8 @@
// edge, just collapse it.
BasicBlock *SinglePred = BB->getSinglePredecessor();
- if (!SinglePred || SinglePred == BB) continue;
+ // Don't merge if BB's address is taken.
+ if (!SinglePred || SinglePred == BB || BB->hasAddressTaken()) continue;
BranchInst *Term = dyn_cast<BranchInst>(SinglePred->getTerminator());
if (Term && !Term->isConditional()) {
@@ -788,7 +789,7 @@
}
// If we eliminated all predecessors of the block, delete the block now.
- if (Changed && pred_begin(BB) == pred_end(BB))
+ if (Changed && !BB->hasAddressTaken() && pred_begin(BB) == pred_end(BB))
BB->eraseFromParent();
return Changed;