[llvm] [DebugInfo] Add Verifier check for local enums in CU's enums field (PR #185228)

[Shivam Kunwar via llvm-commits]

================
@@ -1574,6 +1574,10 @@ void Verifier::visitDICompileUnit(const DICompileUnit &N) {
       auto *Enum = dyn_cast_or_null<DICompositeType>(Op);
       CheckDI(Enum && Enum->getTag() == dwarf::DW_TAG_enumeration_type,
               "invalid enum type", &N, N.getEnumTypes(), Op);
+      if (Enum->getScope())
+        CheckDI(!isa<DILocalScope>(Enum->getScope()),
+                "function-local enum in a DICompileUnit's enum list", &N,
+                N.getEnumTypes(), Op);
     }
----------------
phyBrackets wrote:

might be worth combining into the existing CheckDI block rather than adding a separate if
```
CheckDI(!Enum->getScope() || !isa<DILocalScope>(Enum->getScope()),
        "function-local enum in a DICompileUnit's enum list", &N,
        N.getEnumTypes(), Op);
```

https://github.com/llvm/llvm-project/pull/185228