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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/50957] [C++0x][constexpr] complex<T> ctor drops sign of zero (sometimes) Date: Wed, 02 Nov 2011 09:37:00 -0000 [thread overview] Message-ID: <bug-50957-4-mIym08VwB5@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-50957-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50957 Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Keywords| |wrong-code Last reconfirmed| |2011-11-02 Component|libstdc++ |c++ CC| |jason at gcc dot gnu.org Ever Confirmed|0 |1 Summary|complex<T> ctor drops sign |[C++0x][constexpr] |of zero (sometimes) |complex<T> ctor drops sign | |of zero (sometimes) Known to fail| |4.6.2 --- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-11-02 09:36:44 UTC --- Confirmed. Looks like a frontend issue (probably related to constexpr?). In .initial we have { struct mock_complex z1 = {._M_real=-0.0, ._M_imag=1.0e+0}; struct complex z2 = {._M_value=__complex__ (0.0, 1.0e+0)}; <<cleanup_point struct mock_complex z1 = {._M_real=-0.0, ._M_imag=1.0e+0};>>; thus z2 is already initialized from a bogus value. Without -std=c++0x we have struct complex z2; <<cleanup_point <<< Unknown tree: expr_stmt std::complex<double>::complex (&z2, -0.0, 1.0e+0) >>>>>; which is correct.
next prev parent reply other threads:[~2011-11-02 9:37 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-11-02 8:24 [Bug libstdc++/50957] New: " kreckel at ginac dot de 2011-11-02 9:37 ` rguenth at gcc dot gnu.org [this message] 2011-11-02 9:40 ` [Bug c++/50957] [C++0x][constexpr] " paolo.carlini at oracle dot com
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