[clang] [clang] Respect field alignment in layout compatibility of structs (PR #84313)

[Erich Keane via cfe-commits]

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@@ -19185,7 +19185,7 @@ static bool isLayoutCompatible(ASTContext &C, EnumDecl *ED1, EnumDecl *ED2) {
 
 /// Check if two fields are layout-compatible.
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erichkeane wrote:

Can you update this comment for the new member?  Is it both fields that are union members, or just one?

https://github.com/llvm/llvm-project/pull/84313