[clang] Fix codegen of consteval functions returning an empty class. (PR #93115)

[via cfe-commits]

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@@ -135,6 +135,17 @@ class AggExprEmitter : public StmtVisitor<AggExprEmitter> {
     EnsureDest(E->getType());
 
     if (llvm::Value *Result = ConstantEmitter(CGF).tryEmitConstantExpr(E)) {
+      // An empty record can overlap other data (if declared with
+      // no_unique_address); omit the store for such types - as there is no
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serge-sans-paille wrote:

Candide question: Empty record still need one byte when their address is taken (thus this comment about `no_unique_address` I guess), why don't we see that in the diff?

https://github.com/llvm/llvm-project/pull/93115