[clang] [Clang] Introduce OverflowBehaviorType for fine-grained overflow control (PR #148914)

[Justin Stitt via cfe-commits]

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@@ -8914,6 +8975,12 @@ inline bool Type::isIntegerType() const {
     return IsEnumDeclComplete(ET->getOriginalDecl()) &&
            !IsEnumDeclScoped(ET->getOriginalDecl());
   }
+
+  if (isOverflowBehaviorType())
+    return cast<OverflowBehaviorType>(CanonicalType)
+        ->getUnderlyingType()
+        ->isIntegerType();
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JustinStitt wrote:

fixed with fixed with [`04af8bf`](https://github.com/llvm/llvm-project/pull/148914/commits/04af8bf6e9620c71673a435d3b2eebccd7db3682).

https://github.com/llvm/llvm-project/pull/148914