From 67bf4ba6c32dfcdb258f6c97bc7a74f4d362d681 Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Thu, 7 Aug 2014 15:50:11 -0400
Subject: [PATCH] re PR c++/61959 (ICE: in tree_to_uhwi, at tree.h:3657 when
 building Mozilla code)

	PR c++/61959
	* semantics.c (cxx_eval_bare_aggregate): Handle POINTER_PLUS_EXPR.

From-SVN: r213735
---
 gcc/cp/ChangeLog                              |  3 ++
 gcc/cp/semantics.c                            |  4 ++-
 gcc/testsuite/g++.dg/cpp0x/constexpr-empty7.C | 28 +++++++++++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/cpp0x/constexpr-empty7.C

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index b0e1efd19732..82e61f5f6b7e 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
 2014-08-07  Jason Merrill  <jason@redhat.com>
 
+	PR c++/61959
+	* semantics.c (cxx_eval_bare_aggregate): Handle POINTER_PLUS_EXPR.
+
 	PR c++/58714
 	* tree.c (stabilize_expr): A stabilized prvalue is an xvalue.
 
diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index d5013c446f9f..9825dbe6aa40 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -7296,7 +7296,9 @@ cxx_eval_bare_aggregate (const constexpr_call *call, tree t,
 	  constructor_elt *inner = base_field_constructor_elt (n, ce->index);
 	  inner->value = elt;
 	}
-      else if (ce->index && TREE_CODE (ce->index) == NOP_EXPR)
+      else if (ce->index
+	       && (TREE_CODE (ce->index) == NOP_EXPR
+		   || TREE_CODE (ce->index) == POINTER_PLUS_EXPR))
 	{
 	  /* This is an initializer for an empty base; now that we've
 	     checked that it's constant, we can ignore it.  */
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-empty7.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-empty7.C
new file mode 100644
index 000000000000..f491994a1fed
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-empty7.C
@@ -0,0 +1,28 @@
+// PR c++/61959
+// { dg-do compile { target c++11 } }
+
+template <class Coord> struct BasePoint
+{
+  Coord x, y;
+  constexpr BasePoint (Coord, Coord) : x (0), y (0) {}
+};
+template <class T> struct BaseCoord
+{
+  int value;
+  constexpr BaseCoord (T) : value (1) {}
+};
+template <class units> struct IntCoordTyped : BaseCoord<int>, units
+{
+  typedef BaseCoord Super;
+  constexpr IntCoordTyped (int) : Super (0) {}
+};
+template <class units>
+struct IntPointTyped : BasePoint<IntCoordTyped<units> >, units
+{
+  typedef BasePoint<IntCoordTyped<units> > Super;
+  constexpr IntPointTyped (int, int) : Super (0, 0) {}
+};
+struct A
+{
+};
+IntPointTyped<A> a (0, 0);
-- 
2.47.2