From dc2af9e31ccc511234f54e020afe88f52839793d Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 27 Nov 2018 21:04:41 +0000
Subject: [PATCH] 	PR c++/88181 	* class.c (fixup_attribute_variants):
 Also propagate TYPE_PACKED 	to variants.

	* g++.dg/debug/pr88181.C: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@266527 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/cp/ChangeLog                     |  6 ++++++
 gcc/cp/class.c                       |  2 ++
 gcc/testsuite/ChangeLog              |  3 +++
 gcc/testsuite/g++.dg/debug/pr88181.C | 29 ++++++++++++++++++++++++++++
 4 files changed, 40 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/debug/pr88181.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 8e157f6c25c1..41e66c082974 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2018-11-27  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/88181
+	* class.c (fixup_attribute_variants): Also propagate TYPE_PACKED
+	to variants.
+
 2018-11-26  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/88120 - ICE when calling save_expr in a template.
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 0b50f6715788..be3b4bbbe19e 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -1951,6 +1951,7 @@ fixup_attribute_variants (tree t)
   unsigned align = TYPE_ALIGN (t);
   bool user_align = TYPE_USER_ALIGN (t);
   bool may_alias = lookup_attribute ("may_alias", attrs);
+  bool packed = TYPE_PACKED (t);
 
   if (may_alias)
     fixup_may_alias (t);
@@ -1968,6 +1969,7 @@ fixup_attribute_variants (tree t)
       else
 	TYPE_USER_ALIGN (variants) = user_align;
       SET_TYPE_ALIGN (variants, valign);
+      TYPE_PACKED (variants) = packed;
       if (may_alias)
 	fixup_may_alias (variants);
     }
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 0e211c98e547..d35a3f87cd1b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,8 @@
 2018-11-27  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/88181
+	* g++.dg/debug/pr88181.C: New test.
+
 	PR middle-end/87157
 	* gcc.dg/vect/costmodel/ppc/costmodel-vect-33.c (main1): Add noipa
 	attribute.
diff --git a/gcc/testsuite/g++.dg/debug/pr88181.C b/gcc/testsuite/g++.dg/debug/pr88181.C
new file mode 100644
index 000000000000..fc6f8136b615
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/pr88181.C
@@ -0,0 +1,29 @@
+// PR c++/88181
+// { dg-do compile }
+// { dg-options "-fpack-struct -g -std=c++11" }
+
+template <typename T> struct A { typedef T B; };
+template <typename...> class C;
+template <typename e> struct D { constexpr D (e) {} };
+template <int, typename...> struct E;
+template <int N, typename T, typename... U>
+struct E<N, T, U...> : E<1, U...>, D<T> {
+  constexpr E (T x, U... y) : E<1, U...>(y...), D<T>(x) {}
+};
+template <int N, typename T> struct E<N, T> : D<T> {
+  constexpr E (T x) : D<T>(x) {}
+};
+template <typename T, typename U> struct C<T, U> : E<0, T, U> {
+  constexpr C (T x, U y) : E<0, T, U>(x, y) {}
+  void operator= (typename A<const C>::B);
+};
+struct F {};
+struct G {};
+
+int
+main ()
+{
+  F f;
+  G g;
+  constexpr C<F, G> c(f, g);
+}
-- 
2.47.2