[clang] [CIR] Upstream enum support (PR #136807)

[Bruno Cardoso Lopes via cfe-commits]

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@@ -399,6 +399,14 @@ mlir::Type CIRGenTypes::convertType(QualType type) {
     break;
   }
 
+  case Type::Enum: {
+    const EnumDecl *ED = cast<EnumType>(ty)->getDecl();
+    if (ED->isCompleteDefinition() || ED->isFixed())
+      return convertType(ED->getIntegerType());
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bcardosolopes wrote:

> do you think this is the best approach?

Works for me!

https://github.com/llvm/llvm-project/pull/136807