From f19e6a9c0b51bb432f9754d489f369ab9c9ac052 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Wed, 19 Apr 2017 18:32:02 +0200
Subject: [PATCH] re PR debug/80461 (ICE in modified_type_die, at
 dwarf2out.c:12566)

	PR debug/80461
	* dwarf2out.c (modified_type_die, gen_type_die_with_usage):
	Check for t with zero TYPE_QUALS_NO_ADDR_SPACE.

	* g++.dg/debug/pr80461.C: New test.

From-SVN: r247002
---
 gcc/ChangeLog                        |  4 +++
 gcc/dwarf2out.c                      | 18 ++++++------
 gcc/testsuite/ChangeLog              |  3 ++
 gcc/testsuite/g++.dg/debug/pr80461.C | 42 ++++++++++++++++++++++++++++
 4 files changed, 59 insertions(+), 8 deletions(-)
 create mode 100644 gcc/testsuite/g++.dg/debug/pr80461.C

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 32af94d1b75..6b17e9a8b87 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2017-04-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/80461
+	* dwarf2out.c (modified_type_die, gen_type_die_with_usage):
+	Check for t with zero TYPE_QUALS_NO_ADDR_SPACE.
+
 	PR debug/80436
 	* tree-ssa-loop-manip.c (find_uses_to_rename_def): Ignore debug uses.
 
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 27fb9f05193..98c51576ec2 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -12690,7 +12690,9 @@ modified_type_die (tree type, int cv_quals, bool reverse,
 	     but try to canonicalize.  */
 	  tree main = TYPE_MAIN_VARIANT (type);
 	  for (tree t = main; t; t = TYPE_NEXT_VARIANT (t))
-	    if (check_base_type (t, main) && check_lang_type (t, type))
+	    if (TYPE_QUALS_NO_ADDR_SPACE (t) == 0
+		&& check_base_type (t, main)
+		&& check_lang_type (t, type))
 	      return lookup_type_die (t);
 	  return lookup_type_die (type);
 	}
@@ -24580,13 +24582,13 @@ gen_type_die_with_usage (tree type, dw_die_ref context_die,
 	 but try to canonicalize.  */
       tree main = TYPE_MAIN_VARIANT (type);
       for (tree t = main; t; t = TYPE_NEXT_VARIANT (t))
-	{
-	  if (check_base_type (t, main) && check_lang_type (t, type))
-	    {
-	      type = t;
-	      break;
-	    }
-	}
+	if (TYPE_QUALS_NO_ADDR_SPACE (t) == 0
+	    && check_base_type (t, main)
+	    && check_lang_type (t, type))
+	  {
+	    type = t;
+	    break;
+	  }
     }
   else if (TREE_CODE (type) != VECTOR_TYPE
 	   && TREE_CODE (type) != ARRAY_TYPE)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4c68324c1ff..048541d3107 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2017-04-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR debug/80461
+	* g++.dg/debug/pr80461.C: New test.
+
 	PR c++/80459
 	* c-c++-common/opaque-vector.c (SIZEOF_MAXINT): Define.
 	(f): Don't test long double vectors if __SIZEOF_LONG_DOUBLE__
diff --git a/gcc/testsuite/g++.dg/debug/pr80461.C b/gcc/testsuite/g++.dg/debug/pr80461.C
new file mode 100644
index 00000000000..df7b4229ddf
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/pr80461.C
@@ -0,0 +1,42 @@
+// PR debug/80461
+// { dg-do compile }
+// { dg-options "-g -O" }
+
+template <typename> class A;
+struct B
+{
+  template <typename T, typename U>
+  static bool foo (U T::*) {}
+};
+template <typename, typename> class J;
+template <typename T, typename U, typename V, typename... W>
+class J<V (W...), U T::*> : public J<void(), U T::*> {};
+template <typename T, typename U, typename... W>
+class J<void(W...), U T::*> : public B {};
+template <typename V, typename... W> struct A<V (W...)>
+{
+  template <typename, typename> using K = int;
+  template <typename L, typename = K<int, void>, typename = K<int, void>> A (L);
+};
+template <typename V, typename... W>
+template <typename L, typename, typename>
+A<V (W...)>::A (L x) { J<V (), L>::foo (x); }
+struct N;
+volatile int v;
+
+template <class O, class P>
+void
+bar ()
+{
+  O q;
+  A<P> f = q;
+  v++;
+}
+
+void
+baz ()
+{
+  bar<int (N::*) (...) &, int()> ();
+  bar<int (N::*) (...) const &, int()> ();
+  bar<int (N::*) (...) volatile &, int()> ();
+}
-- 
2.30.2