[llvm] [StackColoring] Delete dead stack slots (PR #72633)

[Nikita Popov via llvm-commits]

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@@ -899,6 +899,13 @@ void StackColoring::remapInstructions(DenseMap<int, int> &SlotRemap) {
   unsigned FixedMemOp = 0;
   unsigned FixedDbg = 0;
 
+  // Remove debug information for deleted slots.
+  erase_if(MF->getVariableDbgInfo(), [&](auto &VI) {
+    int Slot = VI.getStackSlot();
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nikic wrote:

Doesn't this need an inStackSlot() check? VariableDbgInfo can also hold a register.

https://github.com/llvm/llvm-project/pull/72633