[clang] [clang][Itanium Mangle] Enable mangling of enclosing class for member… (PR #110503)

[Haojian Wu via cfe-commits]

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@@ -693,14 +693,13 @@ ItaniumMangleContextImpl::getEffectiveDeclContext(const Decl *D) {
     if (VD->isExternC())
       return getASTContext().getTranslationUnitDecl();
 
-  if (const auto *FD = D->getAsFunction()) {
-    if (FD->isExternC())
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hokein wrote:

why removing the `isExternC()`? this will change the behavior.

https://github.com/llvm/llvm-project/pull/110503