From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 29 Jan 2014 13:40:49 +0000 (+0000)
Subject: 	PR c++/59315
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=4b136559abb3f875a376e26f4c4c5d1109256308;p=thirdparty%2Fgcc.git

	PR c++/59315
	* decl.c (cxx_maybe_build_cleanup): Call mark_used.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@207236 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 3ed0ef8da7fc..f2ff37abb833 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+2014-01-29  Jason Merrill  <jason@redhat.com>
+
+	PR c++/59315
+	* decl.c (cxx_maybe_build_cleanup): Call mark_used.
+
 2014-01-29  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/58702
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index e14e401d0fce..10f4e647cfc6 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -14353,6 +14353,13 @@ cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
      destructor call instead.  */
   if (cleanup != NULL && EXPR_P (cleanup))
     SET_EXPR_LOCATION (cleanup, UNKNOWN_LOCATION);
+
+  if (cleanup
+      && !lookup_attribute ("warn_unused", TYPE_ATTRIBUTES (TREE_TYPE (decl))))
+    /* Treat objects with destructors as used; the destructor may do
+       something substantive.  */
+    mark_used (decl);
+
   return cleanup;
 }
 
diff --git a/gcc/testsuite/g++.dg/warn/Wunused-3.C b/gcc/testsuite/g++.dg/warn/Wunused-3.C
index 31009094352b..2d00dda3faaa 100644
--- a/gcc/testsuite/g++.dg/warn/Wunused-3.C
+++ b/gcc/testsuite/g++.dg/warn/Wunused-3.C
@@ -1,5 +1,5 @@
 // { dg-do compile }
-// { dg-options "-Wunused -O" }
+// { dg-options "-Wunused -O -fno-use-cxa-atexit" }
 
 void do_cleanups();