[PATCH] Fix PR70271

[Richard Biener]

I am testing the following to fix PR70271

Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.

Richard.

2016-03-17  Richard Biener  <rguent...@suse.de>

        PR debug/70271
        * dwarf2out.c (dwarf2out_early_finish): Process deferred_asm_name
        last.

        * g++.dg/debug/pr70271.C: New testcase.

Index: gcc/dwarf2out.c
===================================================================
*** gcc/dwarf2out.c     (revision 234279)
--- gcc/dwarf2out.c     (working copy)
*************** dwarf2out_finish (const char *filename)
*** 27686,27695 ****
  static void
  dwarf2out_early_finish (void)
  {
!   limbo_die_node *node;
  
    /* Add DW_AT_linkage_name for all deferred DIEs.  */
!   for (node = deferred_asm_name; node; node = node->next)
      {
        tree decl = node->created_for;
        if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl)
--- 27686,27700 ----
  static void
  dwarf2out_early_finish (void)
  {
!   /* The point here is to flush out the limbo list so that it is empty
!      and we don't need to stream it for LTO.  */
!   flush_limbo_die_list ();
! 
!   gen_scheduled_generic_parms_dies ();
!   gen_remaining_tmpl_value_param_die_attribute ();
  
    /* Add DW_AT_linkage_name for all deferred DIEs.  */
!   for (limbo_die_node *node = deferred_asm_name; node; node = node->next)
      {
        tree decl = node->created_for;
        if (DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl)
*************** dwarf2out_early_finish (void)
*** 27703,27715 ****
        }
      }
    deferred_asm_name = NULL;
- 
-   /* The point here is to flush out the limbo list so that it is empty
-      and we don't need to stream it for LTO.  */
-   flush_limbo_die_list ();
- 
-   gen_scheduled_generic_parms_dies ();
-   gen_remaining_tmpl_value_param_die_attribute ();
  }
  
  /* Reset all state within dwarf2out.c so that we can rerun the compiler
--- 27708,27713 ----
Index: gcc/testsuite/g++.dg/debug/pr70271.C
===================================================================
*** gcc/testsuite/g++.dg/debug/pr70271.C        (revision 0)
--- gcc/testsuite/g++.dg/debug/pr70271.C        (working copy)
***************
*** 0 ****
--- 1,36 ----
+ // { dg-do compile }
+ 
+ template <typename Function>
+ struct function_traits
+ : public function_traits<decltype(&Function::operator())> 
+ { };
+ 
+ template <typename ClassType, typename ReturnType, typename... Args>
+ struct function_traits<ReturnType(ClassType::*)(Args...) const> 
+ {
+   typedef ReturnType (*pointer)(Args...);
+   typedef ReturnType return_type;
+ };
+ 
+ template <typename Function>
+ typename function_traits<Function>::pointer
+ FunctionPointer (const Function& lambda) 
+ {
+   return static_cast<typename function_traits<Function>::pointer>(lambda);
+ }
+ 
+ template <typename Function>
+ typename function_traits<Function>::return_type
+ GetReturnValue (Function func) 
+ {
+   typename function_traits<Function>::return_type *dummy;
+   return *dummy;
+ }
+ template <typename T> class ClassFoo {};
+ template <typename T> void FuncBar () { }
+ 
+ template <> inline void FuncBar<double> ()
+ {
+   typedef void (*func_type)(ClassFoo<double> &);
+   func_type f1 = FunctionPointer ([](ClassFoo<double> & ref) { });
+ }