[clang] [Clang] Make enums trivially equality comparable (PR #133587)

[Shafik Yaghmour via cfe-commits]

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@@ -5240,9 +5249,13 @@ static bool HasNonDeletedDefaultedEqualityComparison(Sema &S,
 static bool isTriviallyEqualityComparableType(Sema &S, QualType Type, SourceLocation KeyLoc) {
   QualType CanonicalType = Type.getCanonicalType();
   if (CanonicalType->isIncompleteType() || CanonicalType->isDependentType() ||
-      CanonicalType->isEnumeralType() || CanonicalType->isArrayType())
+      CanonicalType->isArrayType())
     return false;
 
+  if (CanonicalType->isEnumeralType())
+    return EqualityComparisonIsDefaulted(
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shafik wrote:

I am probably being dense here but I thought for the both the test cases below `EqualityComparisonIsDefaulted` would return `true` so I was asking if there is a test case in which it returns `false`.

https://github.com/llvm/llvm-project/pull/133587