https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #23 from Jonathan Wakely ---
Author: redi
Date: Wed Sep 28 12:47:24 2016
New Revision: 240574
URL: https://gcc.gnu.org/viewcvs?rev=240574&root=gcc&view=rev
Log:
libstdc++/77686 use may_alias for std::function storage
PR libs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #22 from rguenther at suse dot de ---
On Wed, 28 Sep 2016, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
>
> Jonathan Wakely changed:
>
>What|Removed |Added
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
Jonathan Wakely changed:
What|Removed |Added
Status|NEW |RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #20 from Jonathan Wakely ---
Author: redi
Date: Wed Sep 28 12:03:43 2016
New Revision: 240571
URL: https://gcc.gnu.org/viewcvs?rev=240571&root=gcc&view=rev
Log:
libstdc++/77686 use may_alias for std::function storage
PR libs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #19 from Jonathan Wakely ---
Author: redi
Date: Wed Sep 28 10:57:46 2016
New Revision: 240567
URL: https://gcc.gnu.org/viewcvs?rev=240567&root=gcc&view=rev
Log:
libstdc++/77686 use may_alias for std::function storage
PR libs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #18 from rguenther at suse dot de ---
On Tue, 27 Sep 2016, redi at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
>
> --- Comment #17 from Jonathan Wakely ---
> (In reply to Richard Biener from comment
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #17 from Jonathan Wakely ---
(In reply to Richard Biener from comment #14)
> Just to explain a little bit. Consider
>
> void foo (void)
> {
> union { float f; char c[4]; } u, v;
> *(int *)&u = 0;
> v = u;
> return *(int *)&v
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #16 from Jonathan Wakely ---
For C++ 12.8 [class.copy] says:
-16- The implicitly-defined copy/move constructor for a union X copies the
object representation (3.9) of X.
and
-29- The implicitly-defined copy assignment operator fo
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #15 from Richard Biener ---
Btw, what I fail to find is sth in the (C) standard that specifies the
semantics of an aggregate assignment of union type. Thus I interpret it to use
the
effective type of the object (determined by the las
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #14 from Richard Biener ---
Just to explain a little bit. Consider
void foo (void)
{
union { float f; char c[4]; } u, v;
*(int *)&u = 0;
v = u;
return *(int *)&v;
}
then C11 6.5/6,7 make it clear that it is not valid to use
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #13 from Jonathan Wakely ---
(In reply to Richard Biener from comment #12)
> Index: libstdc++-v3/include/std/functional
> ===
> --- libstdc++-v3/include/std/functional (r
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #12 from Richard Biener ---
Index: libstdc++-v3/include/std/functional
===
--- libstdc++-v3/include/std/functional (revision 240521)
+++ libstdc++-v3/include/std/function
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
--- Comment #11 from Richard Biener ---
;; Function void std::function<_Res(_ArgTypes
...)>::swap(std::function<_Res(_ArgTypes ...)>&) [with _Res = void; _ArgTypes =
{}] (null)
;; enabled by -tree-original
<<< Unknown tree: must_not_throw_expr
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77686
Richard Biener changed:
What|Removed |Added
CC||jwakely.gcc at gmail dot com
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