From 1b4be62ad3e153d2e4eda115698cbf33fca09781 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 28 Sep 2016 11:57:46 +0100
Subject: [PATCH] libstdc++/77686 use may_alias for std::function storage
PR libstdc++/77686
* include/std/functional (_Any_data): Add may_alias attribute.
From-SVN: r240567
---
libstdc++-v3/ChangeLog | 5 +++++
libstdc++-v3/include/std/functional | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 69ec081cd0c4..8c11aad83e1c 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2016-09-28 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/77686
+ * include/std/functional (_Any_data): Add may_alias attribute.
+
2016-09-27 Jonathan Wakely <jwakely@redhat.com>
* doc/xml/manual/status_cxx2017.xml: Update status.
diff --git a/libstdc++-v3/include/std/functional b/libstdc++-v3/include/std/functional
index 8b2389c7250a..74e65c7b96fa 100644
--- a/libstdc++-v3/include/std/functional
+++ b/libstdc++-v3/include/std/functional
@@ -1401,7 +1401,7 @@ _GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type)
void (_Undefined_class::*_M_member_pointer)();
};
- union _Any_data
+ union [[gnu::may_alias]] _Any_data
{
void* _M_access() { return &_M_pod_data[0]; }
const void* _M_access() const { return &_M_pod_data[0]; }
--
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