From e4a148963e82ff2f34c794de0ad7ad3fa2e7b123 Mon Sep 17 00:00:00 2001
From: Jason Merrill <jason@redhat.com>
Date: Tue, 15 May 2018 20:57:56 -0400
Subject: [PATCH] cp-tree.h (cp_expr): Remove copy constructor.

	* cp-tree.h (cp_expr): Remove copy constructor.

	* mangle.c (struct releasing_vec): Declare copy constructor.

From-SVN: r260279
---
 gcc/cp/ChangeLog | 3 +++
 gcc/cp/cp-tree.h | 3 ---
 gcc/cp/mangle.c  | 4 ++++
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 912a96cc94d..3ccaebef47f 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,5 +1,8 @@
 2018-05-15  Jason Merrill  <jason@redhat.com>
 
+	* cp-tree.h (cp_expr): Remove copy constructor.
+	* mangle.c (struct releasing_vec): Declare copy constructor.
+
 	* constexpr.c (cxx_eval_vec_init_1): Pass tf_none if ctx->quiet.
 
 	PR c++/64372 - CWG 1560, gratuitous lvalue-rvalue conversion in ?:
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index 9a2eb3be4d1..cab926028b8 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -59,9 +59,6 @@ public:
   cp_expr (tree value, location_t loc):
     m_value (value), m_loc (loc) {}
 
-  cp_expr (const cp_expr &other) :
-    m_value (other.m_value), m_loc (other.m_loc) {}
-
   /* Implicit conversions to tree.  */
   operator tree () const { return m_value; }
   tree & operator* () { return m_value; }
diff --git a/gcc/cp/mangle.c b/gcc/cp/mangle.c
index 6a7df804caf..59a3111fba2 100644
--- a/gcc/cp/mangle.c
+++ b/gcc/cp/mangle.c
@@ -1555,6 +1555,10 @@ struct releasing_vec
   releasing_vec (vec_t *v): v(v) { }
   releasing_vec (): v(make_tree_vector ()) { }
 
+  /* Copy constructor is deliberately declared but not defined,
+     copies must always be elided.  */
+  releasing_vec (const releasing_vec &);
+
   vec_t &operator* () const { return *v; }
   vec_t *operator-> () const { return v; }
   vec_t *get () const { return v; }