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-rw-r--r--contrib/llvm/lib/Transforms/Utils/Local.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Transforms/Utils/Local.cpp b/contrib/llvm/lib/Transforms/Utils/Local.cpp
index 8e91138..52f0499 100644
--- a/contrib/llvm/lib/Transforms/Utils/Local.cpp
+++ b/contrib/llvm/lib/Transforms/Utils/Local.cpp
@@ -490,6 +490,9 @@ static bool CanPropagatePredecessorsForPHIs(BasicBlock *BB, BasicBlock *Succ) {
/// rewriting all the predecessors to branch to the successor block and return
/// true. If we can't transform, return false.
bool llvm::TryToSimplifyUncondBranchFromEmptyBlock(BasicBlock *BB) {
+ assert(BB != &BB->getParent()->getEntryBlock() &&
+ "TryToSimplifyUncondBranchFromEmptyBlock called on entry block!");
+
// We can't eliminate infinite loops.
BasicBlock *Succ = cast<BranchInst>(BB->getTerminator())->getSuccessor(0);
if (BB == Succ) return false;
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