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-rw-r--r--llvm/lib/Transforms/Utils/BasicBlockUtils.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index 5396038..4941f92 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -333,6 +333,10 @@ bool llvm::MergeBlockIntoPredecessor(BasicBlock *BB, DomTreeUpdater *DTU,
// Finally, erase the old block and update dominator info.
DeleteDeadBlock(BB, DTU);
+ // Remove redundant "llvm.dbg" instrunctions after blocks have been merged.
+ if (PredBB->getParent()->getSubprogram())
+ RemoveRedundantDbgInstrs(PredBB);
+
return true;
}