http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54146
--- Comment #10 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-08-01 14:32:15 UTC --- (In reply to comment #9) > clang compiles the test case with attribute((flatten)) because it doesn't > support that attribute (http://llvm.org/bugs/show_bug.cgi?id=7559). > > I'm beginning to think this is one of those cases of "Doctor it hurts if I > ..." > that should be closed as WONTFIX. Marc, do you know where the use of the > flatten attribute comes from in your code? indeed "flatten" will override any inlining heuristic that avoids creating gigant function bodies. Still eventually improving worst-case performance of some of our algorithms sounds good, even if it will never fix all issues that pop up when you for example put flatten on main () ;)
