[Bug c++/84411] Missed optimization: static guard variable generated for empty virtual destructor

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84411
Bug 84411 depends on bug 19661, which changed state.

Bug 19661 Summary: unnecessary atexit calls emitted for static objects with 
empty destructors
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19661

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution|--- |FIXED

[Bug c++/84411] Missed optimization: static guard variable generated for empty virtual destructor

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84411

Andrew Pinski  changed:

   What|Removed |Added

 CC||antoshkka at gmail dot com

--- Comment #3 from Andrew Pinski  ---
*** Bug 87831 has been marked as a duplicate of this bug. ***

[Bug c++/84411] Missed optimization: static guard variable generated for empty virtual destructor

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84411

Andrew Pinski  changed:

   What|Removed |Added

 CC||barry.revzin at gmail dot com

--- Comment #2 from Andrew Pinski  ---
*** Bug 109268 has been marked as a duplicate of this bug. ***

[Bug c++/84411] Missed optimization: static guard variable generated for empty virtual destructor

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84411

Andrew Pinski  changed:

   What|Removed |Added

 Depends on||19661
 Status|UNCONFIRMED |NEW
   Last reconfirmed||2024-03-16
 Ever confirmed|0   |1
 CC||pinskia at gcc dot gnu.org

--- Comment #1 from Andrew Pinski  ---
This depends on PR 19661.

But then we still need to remove:
   [local count: 1073741824]:
  _1 = __atomic_load_1 (&_ZGVZ8get_basevE1d, 2);
  if (_1 == 0)
goto ; [33.00%]
  else
goto ; [67.00%]
   [local count: 956811341]:
  goto ; [100.00%]

   [local count: 354334800]:
  _2 = __cxa_guard_acquire (&_ZGVZ8get_basevE1d);
  if (_2 != 0)
goto ; [33.00%]
  else
goto ; [67.00%]

   [local count: 116930483]:
  __cxa_guard_release (&_ZGVZ8get_basevE1d);


Note clang/LLVM does not remove the use of the guard here either, even though
it does remove the __cxa_atexit.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19661
[Bug 19661] unnecessary atexit calls emitted for static objects with empty
destructors

[Bug c++/84411] Missed optimization: static guard variable generated for empty virtual destructor

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84411

Andrew Pinski  changed:

   What|Removed |Added

   Severity|normal  |enhancement