[PATCH] debug/110295 - mixed up early/late debug for member DIEs

[Richard Biener via Gcc-patches]

When we process a scope typedef during early debug creation and
we have already created a DIE for the type when the decl is
TYPE_DECL_IS_STUB and this DIE is still in limbo we end up
just re-parenting that type DIE instead of properly creating
a DIE for the decl, eventually picking up the now completed
type and creating DIEs for the members.  Instead this is currently
defered to the second time we come here, when we annotate the
DIEs with locations late where now the type DIE is no longer
in limbo and we fall through doing the job for the decl.

The following makes sure we perform the necessary early tasks
for this by continuing with the decl DIE creation after setting
a parent for the limbo type DIE.

[LTO] Bootstrapped on x86_64-unknown-linux-gnu.

OK for trunk?

Thanks,
Richard.

        PR debug/110295
        * dwarf2out.cc (process_scope_var): Continue processing
        the decl after setting a parent in case the existing DIE
        was in limbo.

        * g++.dg/debug/pr110295.C: New testcase.
---
 gcc/dwarf2out.cc                      |  3 ++-
 gcc/testsuite/g++.dg/debug/pr110295.C | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/debug/pr110295.C

diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index d89ffa66847..e70c47cec8d 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -26533,7 +26533,8 @@ process_scope_var (tree stmt, tree decl, tree origin, 
dw_die_ref context_die)
 
   if (die != NULL && die->die_parent == NULL)
     add_child_die (context_die, die);
-  else if (TREE_CODE (decl_or_origin) == IMPORTED_DECL)
+
+  if (TREE_CODE (decl_or_origin) == IMPORTED_DECL)
     {
       if (early_dwarf)
        dwarf2out_imported_module_or_decl_1 (decl_or_origin, DECL_NAME 
(decl_or_origin),
diff --git a/gcc/testsuite/g++.dg/debug/pr110295.C 
b/gcc/testsuite/g++.dg/debug/pr110295.C
new file mode 100644
index 00000000000..10cad557095
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/pr110295.C
@@ -0,0 +1,19 @@
+// { dg-do compile }
+// { dg-options "-g" }
+
+template <typename T>
+struct QCachedT
+{
+  void operator delete(void *, T *) {}
+};
+template<int a>
+void exercise()
+{
+  struct thing_t
+    : QCachedT<thing_t>
+  {
+  };
+  thing_t *list[1];
+  new thing_t; // { dg-warning "" }
+}
+int main() { exercise<1>(); }
-- 
2.35.3