Update

Author: ChuanqiXu9

clang/include/clang/CIR/Dialect/IR/CIRAttrs.td

@@ -96,10 +96,11 @@ def CIR_BoolAttr : CIR_Attr<"Bool", "bool", [TypedAttrInterface]> {
 // UninitializedUnionFieldAttr
 //===----------------------------------------------------------------------===//
 
-def UninitializedUnionFieldAttr : CIR_Attr<"UninitializedUnionField", "uninitialized_union_field", [TypedAttrInterface]> {
+def InactiveUnionFieldAttr : CIR_Attr<"InactiveUnionField", "inactive_field", [TypedAttrInterface]> {
   let summary = "Attribute to represent an uninitialized field for a union.";
   let description = [{
-    The UninitializedUnionFieldAttr is used to represent an uninitialized field for a union.
+    The InactiveUnionFieldAttr is used to represent an uninitialized field
+    for a union.
   }];
 
   let parameters = (ins AttributeSelfTypeParameter<"">:$type);

clang/lib/CIR/CodeGen/CIRGenExprConst.cpp

@@ -379,7 +379,7 @@ mlir::Attribute ConstantAggregateBuilder::buildFrom(
   bool Packed = false;
   ArrayRef<mlir::Attribute> UnpackedElems;
 
-  // Fullill the init elements for union. This comes from a fundamental
+  // Fill the init elements for union. This comes from a fundamental
   // difference between CIR and LLVM IR. In LLVM IR, the union is simply a
   // struct with the largest member. So it is fine to have only one init
   // element. But in CIR, the union has the information for all members. So if