| Issue |
91836
|
| Summary |
[DebugInfo][LoopLoadElim] Missing debug location updates
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
Apochens
|
Missing debug location updates for new instructions at LoopLoadElimination[-L447](https://github.com/llvm/llvm-project/blob/e62ce1f8842cca36eb14126d79dcca0a85bf6d36/llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp#L447), [-L452](https://github.com/llvm/llvm-project/blob/e62ce1f8842cca36eb14126d79dcca0a85bf6d36/llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp#L452), [-L466](https://github.com/llvm/llvm-project/blob/e62ce1f8842cca36eb14126d79dcca0a85bf6d36/llvm/lib/Transforms/Scalar/LoopLoadElimination.cpp#L466).
```cpp
-> Value *Initial =
new LoadInst(Cand.Load->getType(), InitialPtr, "load_initial",
/* isVolatile */ false, Cand.Load->getAlign(),
PH->getTerminator()->getIterator());
-> PHINode *PHI = PHINode::Create(Initial->getType(), 2, "store_forwarded");
PHI->insertBefore(L->getHeader()->begin());
PHI->addIncoming(Initial, PH);
...
Value *StoreValue = Cand.Store->getValueOperand();
if (LoadType != StoreType)
-> StoreValue = CastInst::CreateBitOrPointerCast(StoreValue, LoadType,
"store_forward_cast",
Cand.Store->getIterator());
PHI->addIncoming(StoreValue, L->getLoopLatch());
Cand.Load->replaceAllUsesWith(PHI);
```
I'll give a patch for this later.
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