[llvm] [InstrRef] Skip clobbered EntryValue register recovery (PR #142478)

[Jeremy Morse via llvm-commits]

================
@@ -668,6 +668,16 @@ class TransferTracker {
 
     auto &[Var, DILoc] = DVMap.lookupDVID(VarID);
 
+    // If the expression is a DW_OP_entry_value, emit the variable location
+    // as-is.
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jmorse wrote:

```suggestion
    // If the expression is already a DW_OP_entry_value, emit the variable location
    // as-is.
```

https://github.com/llvm/llvm-project/pull/142478