Initial check in

Bug: 137197907

src/llvm-project/clang/test/CodeGenCXX/debug-info-class-optzns.cpp

diff --git a/src/llvm-project/clang/test/CodeGenCXX/debug-info-class-optzns.cpp b/src/llvm-project/clang/test/CodeGenCXX/debug-info-class-optzns.cpp
new file mode 100644
index 0000000..d58510b
--- /dev/null
+++ b/src/llvm-project/clang/test/CodeGenCXX/debug-info-class-optzns.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -triple x86_64-unknown_unknown -emit-llvm -debug-info-kind=limited %s -O1 -o - | FileCheck %s
+
+// Ensure class definitions are not emitted to debug info just because the
+// vtable is emitted for optimization purposes (as available_externally). The
+// class definition debug info should only go where the vtable is actually
+// emitted into the object file.
+
+// CHECK: @_ZTV3foo = available_externally
+
+// Verify that this doesn't involve querying for the vtable of types that aren't
+// dynamic (that would cause an assertion in the case below)
+
+// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "bar<int>"
+template <typename> struct bar {};
+extern template struct bar<int>;
+bar<int> *p1;
+bar<int> a;
+
+// CHECK: !DICompositeType(tag: DW_TAG_structure_type, name: "foo"
+// CHECK-SAME: DIFlagFwdDecl
+
+struct foo {
+  virtual void f();
+};
+
+foo f;