http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56493
--- Comment #9 from Christopher Berner <cberner at fb dot com> 2013-04-13 01:37:27 UTC --- Created attachment 29864 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29864 Simple test case Here's an even simpler test case. It seems that there's a fairly serious regression with inlining. Even adding the attribute always_inline doesn't seem to restore performance. However, manually inlining the code with a macro restores performance to gcc 4.6 level