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-rw-r--r--llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
index efff06f79cb..e00541d3c81 100644
--- a/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnrollRuntime.cpp
@@ -648,8 +648,13 @@ bool llvm::UnrollRuntimeLoopRemainder(Loop *L, unsigned Count,
SmallVector<BasicBlock*, 4> Preds(predecessors(LatchExit));
NewExit = SplitBlockPredecessors(LatchExit, Preds, ".unr-lcssa",
DT, LI, PreserveLCSSA);
+ // NewExit gets its DebugLoc from LatchExit, which is not part of the
+ // original Loop.
+ // Fix this by setting Loop's DebugLoc to NewExit.
+ auto *NewExitTerminator = NewExit->getTerminator();
+ NewExitTerminator->setDebugLoc(Header->getTerminator()->getDebugLoc());
// Split NewExit to insert epilog remainder loop.
- EpilogPreHeader = SplitBlock(NewExit, NewExit->getTerminator(), DT, LI);
+ EpilogPreHeader = SplitBlock(NewExit, NewExitTerminator, DT, LI);
EpilogPreHeader->setName(Header->getName() + ".epil.preheader");
} else {
// If prolog remainder
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