18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin -g -emit-llvm -o - | FileCheck %s 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// This test is for a crash when emitting debug info for not-yet-completed 38d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// types. 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// Test that we don't actually emit a forward decl for the offending class: 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt// CHECK: [ DW_TAG_structure_type ] [Derived<int>] {{.*}} [def] 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt// rdar://problem/15931354 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidttemplate <class A> class Derived; 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidttemplate <class A> class Base { 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt static Derived<A> *create(); 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidttemplate <class A> struct Derived : Base<A> { 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry ShmidtBase<int> *f; 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// During the instantiation of Derived<int>, Base<int> becomes required to be 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// complete - since the declaration has already been emitted (due to 'f', 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// above), we immediately try to build debug info for Base<int> which then 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// requires the (incomplete definition) of Derived<int> which is problematic. 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// (if 'f' is not present, the point at which Base<int> becomes required to be 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// complete during the instantiation of Derived<int> is a no-op because 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// Base<int> was never emitted so we ignore it and carry on until we 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt// wire up the base class of Derived<int> in the debug info later on) 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry ShmidtDerived<int> d; 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt