[Bug c++/56894] performance regression in gcc 4.7.x due to a += operation

[laurent.alfonsi at st dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56894



--- Comment #1 from Laurent Aflonsi <laurent.alfonsi at st dot com> 2013-04-09 
15:23:16 UTC ---

Created attachment 29842

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29842

testcase to reproduce