[clang] [clang][Interp] IndirectMember initializers (PR #69900)

[Aaron Ballman via cfe-commits]

================
@@ -198,6 +198,27 @@ bool ByteCodeStmtGen<Emitter>::visitFunc(const FunctionDecl *F) {
           return false;
         if (!this->emitInitPtrPop(InitExpr))
           return false;
+      } else if (const IndirectFieldDecl *IFD = Init->getIndirectMember()) {
+        assert(IFD->getChainingSize() >= 2);
+
+        unsigned NestedFieldOffset = 0;
+        const Record::Field *NestedField = nullptr;
+        for (const NamedDecl *ND : IFD->chain()) {
+          // FIXME: Can this *not* be a FieldDecl?
----------------
AaronBallman wrote:

Yes, it could be an `IndirectFieldDecl`, for example. You should add some tests using anonymous structures and unions where the members are indirectly injected into the parent structure.

https://github.com/llvm/llvm-project/pull/69900