[clang] Always emit complete debug info for types which appear as a member of a standard-layout union. (PR #221615)

[Eli Friedman via cfe-commits]

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@@ -3244,6 +3244,17 @@ static bool canUseCtorHoming(const CXXRecordDecl *RD) {
       RD->hasConstexprNonCopyMoveConstructor())
     return false;
 
+  // Skip this optimization if this type is standard-layout and is a member of
+  // some standard-layout union in this translation unit. Per the C++ spec, "it
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efriedma-quic wrote:

Does this code execute at the end of the translation unit?

https://github.com/llvm/llvm-project/pull/221615