llvm-project/clang/test/CodeGenCXX/debug-info-fwd-ref.cpp

// RUN: %clang_cc1 -emit-llvm -debug-info-kind=limited -triple x86_64-apple-darwin %s -o - | FileCheck %s

struct baz {
    int h;
    baz(int a) : h(a) {}
};

struct bar {
    baz b;
    baz& b_ref;
    bar(int x) : b(x), b_ref(b) {}
};

int main(int argc, char** argv) {
    bar myBar(1);
    return 0;
}

// Make sure we have two DW_TAG_structure_types for baz and bar and no forward
// references.
// CHECK-NOT: DIFlagFwdDecl
// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "bar"
// CHECK-NOT:              DIFlagFwdDecl
// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "baz"
// CHECK-NOT:              DIFlagFwdDecl