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

[Matheus Izvekov via cfe-commits]

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@@ -3780,6 +3780,11 @@ void MicrosoftCXXNameMangler::mangleType(const HLSLInlineSpirvType *T,
   llvm_unreachable("HLSL uses Itanium name mangling");
 }
 
+void MicrosoftCXXNameMangler::mangleType(const OverflowBehaviorType *T,
+                                         Qualifiers, SourceRange Range) {
+  llvm_unreachable("OverflowBehaviorType uses Itanium name mangling");
+}
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mizvekov wrote:

I don't think this is right. On MS-ABI platforms, you still want to mangle the thing using the microsoft mangler, as it is not going to call out into the Itanium Mangler.

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