[PATCH] D57694: [DebugInfo][DAG] Either salvage dangling debug info or emit Undef DBG_VALUEs

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added inline comments.


================
Comment at: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp:1351
+  // Try to fixup any remaining dangling debug info -- and drop it if we can't.
+  for (auto &Pair : DanglingDebugInfoMap)
+    for (auto &DDI : Pair.getSecond())
----------------
```
  /// Keeps track of dbg_values for which we have not yet seen the referent.
  /// We defer handling these until we do see it.
  DenseMap<const Value*, DanglingDebugInfoVector> DanglingDebugInfoMap;
```
I don't think `DenseMap` iteration order is guaranteed, unlike `std::map`?



Repository:
  rL LLVM

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  https://reviews.llvm.org/D57694/new/

https://reviews.llvm.org/D57694