[Bug libstdc++/51798] [4.7 regression] libstdc++ atomicity performance regression due to __sync_fetch_and_add

[bkoz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51798

--- Comment #26 from Benjamin Kosnik <bkoz at gcc dot gnu.org> 2012-02-09 
08:45:10 UTC ---
Created attachment 26620
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26620
complete transition to __atomic, modulo config


... and for config, plan would be to just remove check for atomic builtins and
resulting macros