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

[Justin Stitt via cfe-commits]

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@@ -4043,6 +4043,33 @@ def note_cannot_use_trivial_abi_reason : Note<
   "it has a __weak field|it has a field of a non-trivial class type|"
   "it has an address-discriminated '__ptrauth' field}1">;
 
+// OverflowBehavior attribute
+def err_overflow_behavior_unknown_ident
+    : Error<"'%0' is not a valid argument to attribute %1, only 'wrap' and "
+            "'no_wrap' "
+            "are supported">;
+def warn_overflow_behavior_non_integer_type
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JustinStitt wrote:

These should be errors. I'll change them over.

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