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On 10 February 2014 03:44, Renato Golin <renato.golin at linaro.org> wrote: > On 10 February 2014 02:59, Rafael Espíndola <rafael.espindola at gmail.com> wrote: >> It has to be an attribute because of LTO. You can LTO a file compiled >> with -fasynchronous-unwind-tables and one with >> -fno-asynchronous-unwind-tables. That is why we have the uwtable >>

...it is more about using >> unwind for control flow in the language. Having it allows us >> to prune information used for exception handling. > > nounwind translates into "doesNotThrow()", which is *also* used on > "needsUnwindTables()" which is used in "needsCFIMoves()". > > It's not simple. ;) > > cheers, > --renato Cheers, Rafael