[Bug c++/19531] NRV is performed on volatile temporary

[Bug c++/19531] NRV is performed on volatile temporary

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2007-09-23 12:26 -------
Why didn't you submit a patch?


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2006-01-26 05:35:43         |2007-09-23 12:26:37
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[bangerth at dealii dot org]

------- Comment #3 from bangerth at dealii dot org  2007-09-23 17:13 -------
Confirmed indeed. Core DR 20 added the following text to 12.8/15:

  This  elision  of  copy  operations  is  permitted  in  the  following
  circumstances (which may be combined to eliminate multiple copies):

  --  in a return statement in a function with a class return type, when
      the expression is the name of a non-volatile automatic object with
      the same cv-unqualified type as the function return type, the copy
      operation  can  be  omitted  by  constructing the automatic object
      directly into the function's return value

Note that the return expression is specifically restricted to the name of 
a *non-volatile automatic object*.

W.


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bangerth at dealii dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bangerth at dealii dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[chrbr at gcc dot gnu dot org]

------- Comment #4 from chrbr at gcc dot gnu dot org  2007-09-24 07:10 -------
Created an attachment (id=14248)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14248&action=view)
volatile nrv patch


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chrbr at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |chrbr at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[chrbr at gcc dot gnu dot org]

------- Comment #5 from chrbr at gcc dot gnu dot org  2007-09-24 07:14 -------
the attached patch was hanging in my sandbox. will submit it along with a
testsuite case.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[chrbr at gcc dot gnu dot org]

------- Comment #6 from chrbr at gcc dot gnu dot org  2007-10-08 11:02 -------
patch+testcase at http://gcc.gnu.org/ml/gcc-patches/2007-09/msg01902.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[chrbr at gcc dot gnu dot org]

------- Comment #7 from chrbr at gcc dot gnu dot org  2007-10-31 07:56 -------
Subject: Bug 19531

Author: chrbr
Date: Wed Oct 31 07:55:46 2007
New Revision: 129792

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129792
Log:
fix PR c++/19531: NRV is performed on volatile temporary

Added:
    trunk/gcc/testsuite/g++.dg/opt/nrv8.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/typeck.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[chrbr at gcc dot gnu dot org]

------- Comment #8 from chrbr at gcc dot gnu dot org  2007-10-31 08:01 -------
fixed check_return_expr


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chrbr at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|minor                       |normal


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531

[Bug c++/19531] NRV is performed on volatile temporary

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-19 15:38 -------
Confirmed.

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           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |wrong-code
      Known to fail|                            |4.0.0 3.1
   Last reconfirmed|0000-00-00 00:00:00         |2005-01-19 15:38:39
               date|                            |
            Summary|RVO is performed on volatile|NRV is performed on volatile
                   |temporary                   |temporary


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19531